/*
   +----------------------------------------------------------------------+
   | Copyright (c) The PHP Group                                          |
   +----------------------------------------------------------------------+
   | This source file is subject to version 3.01 of the PHP license,      |
   | that is bundled with this package in the file LICENSE, and is        |
   | available through the world-wide-web at the following url:           |
   | https://www.php.net/license/3_01.txt                                 |
   | If you did not receive a copy of the PHP license and are unable to   |
   | obtain it through the world-wide-web, please send a note to          |
   | license@php.net so we can mail you a copy immediately.               |
   +----------------------------------------------------------------------+
   | Authors: Rasmus Lerdorf <rasmus@php.net>                             |
   |          Stig Bakken <ssb@php.net>                                   |
   |          Jim Winstead <jimw@php.net>                                 |
   +----------------------------------------------------------------------+
 */

/* gd 1.2 is copyright 1994, 1995, Quest Protein Database Center,
   Cold Spring Harbor Labs. */

/* Note that there is no code from the gd package in this file */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "php.h"
#include "php_ini.h"
#include <math.h>
#include "SAPI.h"
#include "php_gd.h"
#include "ext/standard/php_image.h"
#include "ext/standard/info.h"
#include "php_open_temporary_file.h"
#include "php_memory_streams.h"
#include "zend_attributes.h"
#include "zend_object_handlers.h"

#ifdef HAVE_SYS_WAIT_H
# include <sys/wait.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef PHP_WIN32
# include <io.h>
# include <fcntl.h>
# include <windows.h>
# include <Winuser.h>
# include <Wingdi.h>
#endif

#if defined(HAVE_GD_XPM) && defined(HAVE_GD_BUNDLED)
# include <X11/xpm.h>
#endif

#include "gd_compat.h"

#ifdef HAVE_GD_BUNDLED
# include "libgd/gd.h"
# include "libgd/gd_errors.h"
# include "libgd/gdfontt.h"  /* 1 Tiny font */
# include "libgd/gdfonts.h"  /* 2 Small font */
# include "libgd/gdfontmb.h" /* 3 Medium bold font */
# include "libgd/gdfontl.h"  /* 4 Large font */
# include "libgd/gdfontg.h"  /* 5 Giant font */
#else
# include <gd.h>
# include <gd_errors.h>
# include <gdfontt.h>  /* 1 Tiny font */
# include <gdfonts.h>  /* 2 Small font */
# include <gdfontmb.h> /* 3 Medium bold font */
# include <gdfontl.h>  /* 4 Large font */
# include <gdfontg.h>  /* 5 Giant font */
#endif

#if defined(HAVE_GD_FREETYPE) && defined(HAVE_GD_BUNDLED)
# include <ft2build.h>
# include FT_FREETYPE_H
#endif

#if defined(HAVE_GD_XPM) && defined(HAVE_GD_BUNDLED)
# include "X11/xpm.h"
#endif

#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif

/* don't used libgd constants, not used, so going to be removed */
#define PHP_GD_FLIP_HORIZONTAL 1
#define PHP_GD_FLIP_VERTICAL   2
#define PHP_GD_FLIP_BOTH       3

#ifdef HAVE_GD_FREETYPE
static void php_imagettftext_common(INTERNAL_FUNCTION_PARAMETERS, int);
#endif

#include "gd_arginfo.h"

/* as it is not really public, duplicate declaration here to avoid
   pointless warnings */
int overflow2(int a, int b);

static void php_image_filter_negate(INTERNAL_FUNCTION_PARAMETERS);
static void php_image_filter_grayscale(INTERNAL_FUNCTION_PARAMETERS);
static void php_image_filter_brightness(INTERNAL_FUNCTION_PARAMETERS);
static void php_image_filter_contrast(INTERNAL_FUNCTION_PARAMETERS);
static void php_image_filter_colorize(INTERNAL_FUNCTION_PARAMETERS);
static void php_image_filter_edgedetect(INTERNAL_FUNCTION_PARAMETERS);
static void php_image_filter_emboss(INTERNAL_FUNCTION_PARAMETERS);
static void php_image_filter_gaussian_blur(INTERNAL_FUNCTION_PARAMETERS);
static void php_image_filter_selective_blur(INTERNAL_FUNCTION_PARAMETERS);
static void php_image_filter_mean_removal(INTERNAL_FUNCTION_PARAMETERS);
static void php_image_filter_smooth(INTERNAL_FUNCTION_PARAMETERS);
static void php_image_filter_pixelate(INTERNAL_FUNCTION_PARAMETERS);
static void php_image_filter_scatter(INTERNAL_FUNCTION_PARAMETERS);

/* End Section filters declarations */
static gdImagePtr _php_image_create_from_string(zend_string *Data, const char *tn, gdImagePtr (*ioctx_func_p)(gdIOCtxPtr));
static void _php_image_create_from(INTERNAL_FUNCTION_PARAMETERS, int image_type, const char *tn, gdImagePtr (*func_p)(FILE *), gdImagePtr (*ioctx_func_p)(gdIOCtxPtr));
static void _php_image_output(INTERNAL_FUNCTION_PARAMETERS, int image_type, const char *tn);
static gdIOCtx *create_stream_context(php_stream *stream, int close_stream);
static gdIOCtx *create_output_context(zval *to_zval, uint32_t arg_num);
static int _php_image_type(zend_string *data);

/*********************************************************
 *
 * GD Object Representation
 *
 ********************************************************/

zend_class_entry *gd_image_ce;

typedef struct _gd_ext_image_object {
	gdImagePtr image;
	zend_object std;
} php_gd_image_object;

static zend_object_handlers php_gd_image_object_handlers;

static zend_function *php_gd_image_object_get_constructor(zend_object *object)
{
	zend_throw_error(NULL, "You cannot initialize a GdImage object except through helper functions");
	return NULL;
}

/**
 * Returns the underlying php_gd_image_object from a zend_object
 */

static zend_always_inline php_gd_image_object* php_gd_exgdimage_from_zobj_p(zend_object* obj)
{
	return (php_gd_image_object *) ((char *) (obj) - XtOffsetOf(php_gd_image_object, std));
}

/**
 * Converts an extension GdImage instance contained within a zval into the gdImagePtr
 * for use with library APIs
 */
PHP_GD_API gdImagePtr php_gd_libgdimageptr_from_zval_p(zval* zp)
{
	return php_gd_exgdimage_from_zobj_p(Z_OBJ_P(zp))->image;
}


zend_object *php_gd_image_object_create(zend_class_entry *class_type)
{
	php_gd_image_object *intern = zend_object_alloc(sizeof(php_gd_image_object), class_type);

	zend_object_std_init(&intern->std, class_type);
	object_properties_init(&intern->std, class_type);

	return &intern->std;
}

static void php_gd_image_object_free(zend_object *intern)
{
	php_gd_image_object *img_obj_ptr = php_gd_exgdimage_from_zobj_p(intern);
	if (img_obj_ptr->image) {
		gdImageDestroy(img_obj_ptr->image);
	}
	zend_object_std_dtor(intern);
}

/**
 * Creates a new GdImage object wrapping the gdImagePtr and attaches it
 * to the zval (usually return_value).
 *
 * This function must only be called once per valid gdImagePtr
 */
void php_gd_assign_libgdimageptr_as_extgdimage(zval *val, gdImagePtr image)
{
	object_init_ex(val, gd_image_ce);
	php_gd_exgdimage_from_zobj_p(Z_OBJ_P(val))->image = image;
}

static void php_gd_object_minit_helper(void)
{
	gd_image_ce = register_class_GdImage();
	gd_image_ce->create_object = php_gd_image_object_create;
	gd_image_ce->default_object_handlers = &php_gd_image_object_handlers;

	/* setting up the object handlers for the GdImage class */
	memcpy(&php_gd_image_object_handlers, &std_object_handlers, sizeof(zend_object_handlers));
	php_gd_image_object_handlers.clone_obj = NULL;
	php_gd_image_object_handlers.free_obj = php_gd_image_object_free;
	php_gd_image_object_handlers.get_constructor = php_gd_image_object_get_constructor;
	php_gd_image_object_handlers.compare = zend_objects_not_comparable;
	php_gd_image_object_handlers.offset = XtOffsetOf(php_gd_image_object, std);
}

static zend_class_entry *gd_font_ce = NULL;
static zend_object_handlers php_gd_font_object_handlers;

typedef struct _php_gd_font_object {
	gdFontPtr font;
	zend_object std;
} php_gd_font_object;

static php_gd_font_object *php_gd_font_object_from_zend_object(zend_object *zobj)
{
	return ((php_gd_font_object*)(zobj + 1)) - 1;
}

static zend_object *php_gd_font_object_to_zend_object(php_gd_font_object *obj)
{
	return ((zend_object*)(obj + 1)) - 1;
}

static zend_object *php_gd_font_object_create(zend_class_entry *ce)
{
	php_gd_font_object *obj = zend_object_alloc(sizeof(php_gd_font_object), ce);
	zend_object *zobj = php_gd_font_object_to_zend_object(obj);

	obj->font = NULL;
	zend_object_std_init(zobj, ce);
	object_properties_init(zobj, ce);
	zobj->handlers = &php_gd_font_object_handlers;

	return zobj;
}

static void php_gd_font_object_free(zend_object *zobj)
{
	php_gd_font_object *obj = php_gd_font_object_from_zend_object(zobj);

	if (obj->font) {
		if (obj->font->data) {
			efree(obj->font->data);
		}
		efree(obj->font);
		obj->font = NULL;
	}

	zend_object_std_dtor(zobj);
}

static zend_function *php_gd_font_object_get_constructor(zend_object *object)
{
	zend_throw_error(NULL, "You cannot initialize a GdFont object except through helper functions");
	return NULL;
}

static void php_gd_font_minit_helper(void)
{
	gd_font_ce = register_class_GdFont();
	gd_font_ce->create_object = php_gd_font_object_create;

	/* setting up the object handlers for the GdFont class */
	memcpy(&php_gd_font_object_handlers, &std_object_handlers, sizeof(zend_object_handlers));
	php_gd_font_object_handlers.clone_obj = NULL;
	php_gd_font_object_handlers.free_obj = php_gd_font_object_free;
	php_gd_font_object_handlers.get_constructor = php_gd_font_object_get_constructor;
	php_gd_font_object_handlers.offset = XtOffsetOf(php_gd_font_object, std);
}

/*********************************************************
 *
 * Extension Implementation
 *
 ********************************************************/

zend_module_entry gd_module_entry = {
	STANDARD_MODULE_HEADER,
	"gd",
	ext_functions,
	PHP_MINIT(gd),
	PHP_MSHUTDOWN(gd),
	NULL,
	PHP_RSHUTDOWN(gd),
	PHP_MINFO(gd),
	PHP_GD_VERSION,
	STANDARD_MODULE_PROPERTIES
};

#ifdef COMPILE_DL_GD
ZEND_GET_MODULE(gd)
#endif

/* {{{ PHP_INI_BEGIN */
PHP_INI_BEGIN()
	PHP_INI_ENTRY_EX("gd.jpeg_ignore_warning", "1", PHP_INI_ALL, NULL, zend_ini_boolean_displayer_cb)
PHP_INI_END()
/* }}} */

/* {{{ php_gd_error_method */
void php_gd_error_method(int type, const char *format, va_list args)
{
	switch (type) {
#ifndef PHP_WIN32
		case GD_DEBUG:
		case GD_INFO:
#endif
		case GD_NOTICE:
			type = E_NOTICE;
			break;
		case GD_WARNING:
			type = E_WARNING;
			break;
		default:
			type = E_ERROR;
	}
	php_verror(NULL, "", type, format, args);
}
/* }}} */

/* {{{ PHP_MINIT_FUNCTION */
PHP_MINIT_FUNCTION(gd)
{
	php_gd_object_minit_helper();
	php_gd_font_minit_helper();

#if defined(HAVE_GD_FREETYPE) && defined(HAVE_GD_BUNDLED)
	gdFontCacheMutexSetup();
#endif
	gdSetErrorMethod(php_gd_error_method);

	REGISTER_INI_ENTRIES();

	register_gd_symbols(module_number);

	return SUCCESS;
}
/* }}} */

/* {{{ PHP_MSHUTDOWN_FUNCTION */
PHP_MSHUTDOWN_FUNCTION(gd)
{
#if defined(HAVE_GD_FREETYPE) && defined(HAVE_GD_BUNDLED)
	gdFontCacheMutexShutdown();
#endif
	UNREGISTER_INI_ENTRIES();
	return SUCCESS;
}
/* }}} */

/* {{{ PHP_RSHUTDOWN_FUNCTION */
PHP_RSHUTDOWN_FUNCTION(gd)
{
#ifdef HAVE_GD_FREETYPE
	gdFontCacheShutdown();
#endif
	return SUCCESS;
}
/* }}} */

#ifdef HAVE_GD_BUNDLED
#define PHP_GD_VERSION_STRING "bundled (2.1.0 compatible)"
#else
# define PHP_GD_VERSION_STRING GD_VERSION_STRING
#endif

/* {{{ PHP_MINFO_FUNCTION */
PHP_MINFO_FUNCTION(gd)
{
	php_info_print_table_start();
	php_info_print_table_row(2, "GD Support", "enabled");

	/* need to use a PHPAPI function here because it is external module in windows */

#ifdef HAVE_GD_BUNDLED
	php_info_print_table_row(2, "GD Version", PHP_GD_VERSION_STRING);
#else
	php_info_print_table_row(2, "GD headers Version", PHP_GD_VERSION_STRING);
#ifdef HAVE_GD_LIBVERSION
	php_info_print_table_row(2, "GD library Version", gdVersionString());
#endif
#endif

#ifdef HAVE_GD_FREETYPE
	php_info_print_table_row(2, "FreeType Support", "enabled");
	php_info_print_table_row(2, "FreeType Linkage", "with freetype");
#ifdef HAVE_GD_BUNDLED
	{
		char tmp[256];

#ifdef FREETYPE_PATCH
		snprintf(tmp, sizeof(tmp), "%d.%d.%d", FREETYPE_MAJOR, FREETYPE_MINOR, FREETYPE_PATCH);
#elif defined(FREETYPE_MAJOR)
		snprintf(tmp, sizeof(tmp), "%d.%d", FREETYPE_MAJOR, FREETYPE_MINOR);
#else
		snprintf(tmp, sizeof(tmp), "1.x");
#endif
		php_info_print_table_row(2, "FreeType Version", tmp);
	}
#endif
#endif

	php_info_print_table_row(2, "GIF Read Support", "enabled");
	php_info_print_table_row(2, "GIF Create Support", "enabled");

#ifdef HAVE_GD_JPG
	{
		php_info_print_table_row(2, "JPEG Support", "enabled");
#ifdef HAVE_GD_BUNDLED
		php_info_print_table_row(2, "libJPEG Version", gdJpegGetVersionString());
#endif
	}
#endif

#ifdef HAVE_GD_PNG
	php_info_print_table_row(2, "PNG Support", "enabled");
#ifdef HAVE_GD_BUNDLED
	php_info_print_table_row(2, "libPNG Version", gdPngGetVersionString());
#endif
#endif
	php_info_print_table_row(2, "WBMP Support", "enabled");
#ifdef HAVE_GD_XPM
	php_info_print_table_row(2, "XPM Support", "enabled");
#ifdef HAVE_GD_BUNDLED
	{
		char tmp[12];
		snprintf(tmp, sizeof(tmp), "%d", XpmLibraryVersion());
		php_info_print_table_row(2, "libXpm Version", tmp);
	}
#endif
#endif
	php_info_print_table_row(2, "XBM Support", "enabled");
#ifdef USE_GD_JISX0208
	php_info_print_table_row(2, "JIS-mapped Japanese Font Support", "enabled");
#endif
#ifdef HAVE_GD_WEBP
	php_info_print_table_row(2, "WebP Support", "enabled");
#endif
	php_info_print_table_row(2, "BMP Support", "enabled");
#ifdef HAVE_GD_AVIF
	php_info_print_table_row(2, "AVIF Support", "enabled");
#endif
	php_info_print_table_row(2, "TGA Read Support", "enabled");
	php_info_print_table_end();
	DISPLAY_INI_ENTRIES();
}
/* }}} */

/* {{{ */
PHP_FUNCTION(gd_info)
{
	ZEND_PARSE_PARAMETERS_NONE();

	array_init(return_value);

	add_assoc_string(return_value, "GD Version", PHP_GD_VERSION_STRING);

#ifdef HAVE_GD_FREETYPE
	add_assoc_bool(return_value, "FreeType Support", 1);
	add_assoc_string(return_value, "FreeType Linkage", "with freetype");
#else
	add_assoc_bool(return_value, "FreeType Support", 0);
#endif
	add_assoc_bool(return_value, "GIF Read Support", 1);
	add_assoc_bool(return_value, "GIF Create Support", 1);
#ifdef HAVE_GD_JPG
	add_assoc_bool(return_value, "JPEG Support", 1);
#else
	add_assoc_bool(return_value, "JPEG Support", 0);
#endif
#ifdef HAVE_GD_PNG
	add_assoc_bool(return_value, "PNG Support", 1);
#else
	add_assoc_bool(return_value, "PNG Support", 0);
#endif
	add_assoc_bool(return_value, "WBMP Support", 1);
#ifdef HAVE_GD_XPM
	add_assoc_bool(return_value, "XPM Support", 1);
#else
	add_assoc_bool(return_value, "XPM Support", 0);
#endif
	add_assoc_bool(return_value, "XBM Support", 1);
#ifdef HAVE_GD_WEBP
	add_assoc_bool(return_value, "WebP Support", 1);
#else
	add_assoc_bool(return_value, "WebP Support", 0);
#endif
	add_assoc_bool(return_value, "BMP Support", 1);
#ifdef HAVE_GD_AVIF
	add_assoc_bool(return_value, "AVIF Support", 1);
#else
	add_assoc_bool(return_value, "AVIF Support", 0);
#endif
	add_assoc_bool(return_value, "TGA Read Support", 1);
#ifdef USE_GD_JISX0208
	add_assoc_bool(return_value, "JIS-mapped Japanese Font Support", 1);
#else
	add_assoc_bool(return_value, "JIS-mapped Japanese Font Support", 0);
#endif
}
/* }}} */

#define FLIPWORD(a) (((a & 0xff000000) >> 24) | ((a & 0x00ff0000) >> 8) | ((a & 0x0000ff00) << 8) | ((a & 0x000000ff) << 24))

/* {{{ Load a new font */
PHP_FUNCTION(imageloadfont)
{
	zend_string *file;
	int hdr_size = sizeof(gdFont) - sizeof(char *);
	int body_size, n = 0, b, i, body_size_check;
	gdFontPtr font;
	php_stream *stream;

	ZEND_PARSE_PARAMETERS_START(1, 1)
		Z_PARAM_PATH_STR(file)
	ZEND_PARSE_PARAMETERS_END();

	stream = php_stream_open_wrapper(ZSTR_VAL(file), "rb", IGNORE_PATH | REPORT_ERRORS, NULL);
	if (stream == NULL) {
		RETURN_FALSE;
	}

	/* Only supports a architecture-dependent binary dump format
	 * at the moment.
	 * The file format is like this on machines with 32-byte integers:
	 *
	 * byte 0-3:   (int) number of characters in the font
	 * byte 4-7:   (int) value of first character in the font (often 32, space)
	 * byte 8-11:  (int) pixel width of each character
	 * byte 12-15: (int) pixel height of each character
	 * bytes 16-:  (char) array with character data, one byte per pixel
	 *                    in each character, for a total of
	 *                    (nchars*width*height) bytes.
	 */
	font = (gdFontPtr) emalloc(sizeof(gdFont));
	b = 0;
	while (b < hdr_size && (n = php_stream_read(stream, (char*)&font[b], hdr_size - b)) > 0) {
		b += n;
	}

	if (n <= 0) {
		efree(font);
		if (php_stream_eof(stream)) {
			php_error_docref(NULL, E_WARNING, "End of file while reading header");
		} else {
			php_error_docref(NULL, E_WARNING, "Error while reading header");
		}
		php_stream_close(stream);
		RETURN_FALSE;
	}
	i = php_stream_tell(stream);
	php_stream_seek(stream, 0, SEEK_END);
	body_size_check = php_stream_tell(stream) - hdr_size;
	php_stream_seek(stream, i, SEEK_SET);

	if (overflow2(font->nchars, font->h) || overflow2(font->nchars * font->h, font->w )) {
		php_error_docref(NULL, E_WARNING, "Error reading font, invalid font header");
		efree(font);
		php_stream_close(stream);
		RETURN_FALSE;
	}

	body_size = font->w * font->h * font->nchars;
	if (body_size != body_size_check) {
		font->w = FLIPWORD(font->w);
		font->h = FLIPWORD(font->h);
		font->nchars = FLIPWORD(font->nchars);
		if (overflow2(font->nchars, font->h) || overflow2(font->nchars * font->h, font->w )) {
			php_error_docref(NULL, E_WARNING, "Error reading font, invalid font header");
			efree(font);
			php_stream_close(stream);
			RETURN_FALSE;
		}
		body_size = font->w * font->h * font->nchars;
	}

	if (body_size != body_size_check) {
		php_error_docref(NULL, E_WARNING, "Error reading font");
		efree(font);
		php_stream_close(stream);
		RETURN_FALSE;
	}

	ZEND_ASSERT(body_size > 0);
	font->data = emalloc(body_size);
	b = 0;
	while (b < body_size && (n = php_stream_read(stream, &font->data[b], body_size - b)) > 0) {
		b += n;
	}

	if (n <= 0) {
		efree(font->data);
		efree(font);
		if (php_stream_eof(stream)) {
			php_error_docref(NULL, E_WARNING, "End of file while reading body");
		} else {
			php_error_docref(NULL, E_WARNING, "Error while reading body");
		}
		php_stream_close(stream);
		RETURN_FALSE;
	}
	php_stream_close(stream);

	object_init_ex(return_value, gd_font_ce);
	php_gd_font_object_from_zend_object(Z_OBJ_P(return_value))->font = font;
}
/* }}} */

/* {{{ Set the line drawing styles for use with imageline and IMG_COLOR_STYLED. */
PHP_FUNCTION(imagesetstyle)
{
	zval *IM, *styles, *item;
	gdImagePtr im;
	int *stylearr;
	int index = 0;
	uint32_t num_styles;

	ZEND_PARSE_PARAMETERS_START(2, 2)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_ARRAY(styles)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	num_styles = zend_hash_num_elements(Z_ARRVAL_P(styles));
	if (num_styles == 0) {
		zend_argument_must_not_be_empty_error(2);
		RETURN_THROWS();
	}

	/* copy the style values in the stylearr */
	stylearr = safe_emalloc(num_styles, sizeof(int), 0);

	ZEND_HASH_FOREACH_VAL(Z_ARRVAL_P(styles), item) {
		stylearr[index++] = zval_get_long(item);
	} ZEND_HASH_FOREACH_END();

	gdImageSetStyle(im, stylearr, index);

	efree(stylearr);

	RETURN_TRUE;
}
/* }}} */

/* {{{ Create a new true color image */
PHP_FUNCTION(imagecreatetruecolor)
{
	zend_long x_size, y_size;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(2, 2)
		Z_PARAM_LONG(x_size)
		Z_PARAM_LONG(y_size)
	ZEND_PARSE_PARAMETERS_END();

	if (x_size <= 0 || x_size >= INT_MAX) {
		zend_argument_value_error(1, "must be greater than 0");
		RETURN_THROWS();
	}

	if (y_size <= 0 || y_size >= INT_MAX) {
		zend_argument_value_error(2, "must be greater than 0");
		RETURN_THROWS();
	}

	im = gdImageCreateTrueColor(x_size, y_size);

	if (!im) {
		RETURN_FALSE;
	}

	php_gd_assign_libgdimageptr_as_extgdimage(return_value, im);
}
/* }}} */

/* {{{ return true if the image uses truecolor */
PHP_FUNCTION(imageistruecolor)
{
	zval *IM;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(1, 1)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	RETURN_BOOL(im->trueColor);
}
/* }}} */

/* {{{ Convert a true color image to a palette based image with a number of colors, optionally using dithering. */
PHP_FUNCTION(imagetruecolortopalette)
{
	zval *IM;
	bool dither;
	zend_long ncolors;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(3, 3)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_BOOL(dither)
		Z_PARAM_LONG(ncolors)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	if (ncolors <= 0 || ZEND_LONG_INT_OVFL(ncolors)) {
		zend_argument_value_error(3, "must be greater than 0 and less than %d", INT_MAX);
		RETURN_THROWS();
	}

	if (gdImageTrueColorToPalette(im, dither, (int)ncolors)) {
		RETURN_TRUE;
	} else {
		php_error_docref(NULL, E_WARNING, "Couldn't convert to palette");
		RETURN_FALSE;
	}
}
/* }}} */

/* {{{ Convert a palette based image to a true color image. */
PHP_FUNCTION(imagepalettetotruecolor)
{
	zval *IM;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(1, 1)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	RETURN_BOOL(gdImagePaletteToTrueColor(im) != 0);
}
/* }}} */

/* {{{ Makes the colors of the palette version of an image more closely match the true color version */
PHP_FUNCTION(imagecolormatch)
{
	zval *IM1, *IM2;
	gdImagePtr im1, im2;
	int result;

	ZEND_PARSE_PARAMETERS_START(2, 2)
		Z_PARAM_OBJECT_OF_CLASS(IM1, gd_image_ce)
		Z_PARAM_OBJECT_OF_CLASS(IM2, gd_image_ce)
	ZEND_PARSE_PARAMETERS_END();

	im1 = php_gd_libgdimageptr_from_zval_p(IM1);
	im2 = php_gd_libgdimageptr_from_zval_p(IM2);

	result = gdImageColorMatch(im1, im2);
	switch (result) {
		case -1:
			zend_argument_value_error(1, "must be TrueColor");
			RETURN_THROWS();
			break;
		case -2:
			zend_argument_value_error(2, "must be Palette");
			RETURN_THROWS();
			break;
		case -3:
			zend_argument_value_error(2, "must be the same size as argument #1 ($im1)");
			RETURN_THROWS();
			break;
		case -4:
			zend_argument_value_error(2, "must have at least one color");
			RETURN_THROWS();
			break;
	}

	RETURN_TRUE;
}
/* }}} */

/* {{{ Set line thickness for drawing lines, ellipses, rectangles, polygons etc. */
PHP_FUNCTION(imagesetthickness)
{
	zval *IM;
	zend_long thick;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(2, 2)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(thick)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	gdImageSetThickness(im, thick);

	RETURN_TRUE;
}
/* }}} */

/* {{{ Draw an ellipse */
PHP_FUNCTION(imagefilledellipse)
{
	zval *IM;
	zend_long cx, cy, w, h, color;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(6, 6)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(cx)
		Z_PARAM_LONG(cy)
		Z_PARAM_LONG(w)
		Z_PARAM_LONG(h)
		Z_PARAM_LONG(color)
	ZEND_PARSE_PARAMETERS_END();

    if (w < 0 || ZEND_LONG_INT_OVFL(w)) {
        zend_argument_value_error(4, "must be between 0 and %d", INT_MAX);
        RETURN_THROWS();
    }

	im = php_gd_libgdimageptr_from_zval_p(IM);

	gdImageFilledEllipse(im, cx, cy, w, h, color);
	RETURN_TRUE;
}
/* }}} */

/* {{{ Draw a filled partial ellipse */
PHP_FUNCTION(imagefilledarc)
{
	zval *IM;
	zend_long cx, cy, w, h, ST, E, col, style;
	gdImagePtr im;
	int e, st;

	ZEND_PARSE_PARAMETERS_START(9, 9)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(cx)
		Z_PARAM_LONG(cy)
		Z_PARAM_LONG(w)
		Z_PARAM_LONG(h)
		Z_PARAM_LONG(ST)
		Z_PARAM_LONG(E)
		Z_PARAM_LONG(col)
		Z_PARAM_LONG(style)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	e = E;
	if (e < 0) {
		e %= 360;
	}

	st = ST;
	if (st < 0) {
		st %= 360;
	}

	gdImageFilledArc(im, cx, cy, w, h, st, e, col, style);

	RETURN_TRUE;
}
/* }}} */

/* {{{ Turn alpha blending mode on or off for the given image */
PHP_FUNCTION(imagealphablending)
{
	zval *IM;
	bool blend;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(2, 2)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_BOOL(blend)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	gdImageAlphaBlending(im, blend);

	RETURN_TRUE;
}
/* }}} */

/* {{{ Include alpha channel to a saved image */
PHP_FUNCTION(imagesavealpha)
{
	zval *IM;
	bool save;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(2, 2)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_BOOL(save)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	gdImageSaveAlpha(im, save);

	RETURN_TRUE;
}
/* }}} */

/* {{{ Set the alpha blending flag to use the bundled libgd layering effects */
PHP_FUNCTION(imagelayereffect)
{
	zval *IM;
	zend_long effect;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(2, 2)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(effect)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	gdImageAlphaBlending(im, effect);

	RETURN_TRUE;
}
/* }}} */

#define CHECK_RGBA_RANGE(component, name, argument_number) \
	if (component < 0 || component > gd##name##Max) { \
		zend_argument_value_error(argument_number, "must be between 0 and %d (inclusive)", gd##name##Max); \
		RETURN_THROWS(); \
	}

/* {{{ Allocate a color with an alpha level.  Works for true color and palette based images */
PHP_FUNCTION(imagecolorallocatealpha)
{
	zval *IM;
	zend_long red, green, blue, alpha;
	gdImagePtr im;
	int ct = (-1);

	ZEND_PARSE_PARAMETERS_START(5, 5)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(red)
		Z_PARAM_LONG(green)
		Z_PARAM_LONG(blue)
		Z_PARAM_LONG(alpha)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	CHECK_RGBA_RANGE(red, Red, 2);
	CHECK_RGBA_RANGE(green, Green, 3);
	CHECK_RGBA_RANGE(blue, Blue, 4);
	CHECK_RGBA_RANGE(alpha, Alpha, 5);

	ct = gdImageColorAllocateAlpha(im, red, green, blue, alpha);
	if (ct < 0) {
		RETURN_FALSE;
	}
	RETURN_LONG((zend_long)ct);
}
/* }}} */

/* {{{ Resolve/Allocate a colour with an alpha level.  Works for true colour and palette based images */
PHP_FUNCTION(imagecolorresolvealpha)
{
	zval *IM;
	zend_long red, green, blue, alpha;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(5, 5)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(red)
		Z_PARAM_LONG(green)
		Z_PARAM_LONG(blue)
		Z_PARAM_LONG(alpha)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	CHECK_RGBA_RANGE(red, Red, 2);
	CHECK_RGBA_RANGE(green, Green, 3);
	CHECK_RGBA_RANGE(blue, Blue, 4);
	CHECK_RGBA_RANGE(alpha, Alpha, 5);

	RETURN_LONG(gdImageColorResolveAlpha(im, red, green, blue, alpha));
}
/* }}} */

/* {{{ Find the closest matching colour with alpha transparency */
PHP_FUNCTION(imagecolorclosestalpha)
{
	zval *IM;
	zend_long red, green, blue, alpha;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(5, 5)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(red)
		Z_PARAM_LONG(green)
		Z_PARAM_LONG(blue)
		Z_PARAM_LONG(alpha)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	CHECK_RGBA_RANGE(red, Red, 2);
	CHECK_RGBA_RANGE(green, Green, 3);
	CHECK_RGBA_RANGE(blue, Blue, 4);
	CHECK_RGBA_RANGE(alpha, Alpha, 5);

	RETURN_LONG(gdImageColorClosestAlpha(im, red, green, blue, alpha));
}
/* }}} */

/* {{{ Find exact match for colour with transparency */
PHP_FUNCTION(imagecolorexactalpha)
{
	zval *IM;
	zend_long red, green, blue, alpha;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(5, 5)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(red)
		Z_PARAM_LONG(green)
		Z_PARAM_LONG(blue)
		Z_PARAM_LONG(alpha)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	CHECK_RGBA_RANGE(red, Red, 2);
	CHECK_RGBA_RANGE(green, Green, 3);
	CHECK_RGBA_RANGE(blue, Blue, 4);
	CHECK_RGBA_RANGE(alpha, Alpha, 5);

	RETURN_LONG(gdImageColorExactAlpha(im, red, green, blue, alpha));
}
/* }}} */

/* {{{ Copy and resize part of an image using resampling to help ensure clarity */
PHP_FUNCTION(imagecopyresampled)
{
	zval *SIM, *DIM;
	zend_long SX, SY, SW, SH, DX, DY, DW, DH;
	gdImagePtr im_dst, im_src;
	int srcH, srcW, dstH, dstW, srcY, srcX, dstY, dstX;

	ZEND_PARSE_PARAMETERS_START(10, 10)
		Z_PARAM_OBJECT_OF_CLASS(DIM, gd_image_ce)
		Z_PARAM_OBJECT_OF_CLASS(SIM, gd_image_ce)
		Z_PARAM_LONG(DX)
		Z_PARAM_LONG(DY)
		Z_PARAM_LONG(SX)
		Z_PARAM_LONG(SY)
		Z_PARAM_LONG(DW)
		Z_PARAM_LONG(DH)
		Z_PARAM_LONG(SW)
		Z_PARAM_LONG(SH)
	ZEND_PARSE_PARAMETERS_END();

	im_src = php_gd_libgdimageptr_from_zval_p(SIM);
	im_dst = php_gd_libgdimageptr_from_zval_p(DIM);

	srcX = SX;
	srcY = SY;
	srcH = SH;
	srcW = SW;
	dstX = DX;
	dstY = DY;
	dstH = DH;
	dstW = DW;

	gdImageCopyResampled(im_dst, im_src, dstX, dstY, srcX, srcY, dstW, dstH, srcW, srcH);

	RETURN_TRUE;
}
/* }}} */

#ifdef PHP_WIN32
/* {{{ Grab a window or its client area using a windows handle (HWND property in COM instance) */
PHP_FUNCTION(imagegrabwindow)
{
	HWND window;
	bool client_area = false;
	RECT rc = {0};
	int Width, Height;
	HDC		hdc;
	HDC memDC;
	HBITMAP memBM;
	HBITMAP hOld;
	zend_long lwindow_handle;
	gdImagePtr im = NULL;

	ZEND_PARSE_PARAMETERS_START(1, 2)
		Z_PARAM_LONG(lwindow_handle)
		Z_PARAM_OPTIONAL
		Z_PARAM_BOOL(client_area)
	ZEND_PARSE_PARAMETERS_END();

	window = (HWND) lwindow_handle;

	if (!IsWindow(window)) {
		php_error_docref(NULL, E_NOTICE, "Invalid window handle");
		RETURN_FALSE;
	}

	hdc		= GetDC(0);

	if (client_area) {
		GetClientRect(window, &rc);
		Width = rc.right;
		Height = rc.bottom;
	} else {
		GetWindowRect(window, &rc);
		Width	= rc.right - rc.left;
		Height	= rc.bottom - rc.top;
	}

	Width		= (Width/4)*4;

	memDC	= CreateCompatibleDC(hdc);
	memBM	= CreateCompatibleBitmap(hdc, Width, Height);
	hOld	= (HBITMAP) SelectObject (memDC, memBM);

	PrintWindow(window, memDC, (UINT) client_area);

	im = gdImageCreateTrueColor(Width, Height);
	if (im) {
		int x,y;
		for (y=0; y <= Height; y++) {
			for (x=0; x <= Width; x++) {
				int c = GetPixel(memDC, x,y);
				gdImageSetPixel(im, x, y, gdTrueColor(GetRValue(c), GetGValue(c), GetBValue(c)));
			}
		}
	}

	SelectObject(memDC,hOld);
	DeleteObject(memBM);
	DeleteDC(memDC);
	ReleaseDC( 0, hdc );

	if (!im) {
		RETURN_FALSE;
	}

	php_gd_assign_libgdimageptr_as_extgdimage(return_value, im);
}
/* }}} */

/* {{{ Grab a screenshot */
PHP_FUNCTION(imagegrabscreen)
{
	HWND window = GetDesktopWindow();
	RECT rc = {0};
	int Width, Height;
	HDC		hdc;
	HDC memDC;
	HBITMAP memBM;
	HBITMAP hOld;
	gdImagePtr im;
	hdc		= GetDC(0);

	ZEND_PARSE_PARAMETERS_NONE();

	if (!hdc) {
		RETURN_FALSE;
	}

	GetWindowRect(window, &rc);
	Width	= rc.right - rc.left;
	Height	= rc.bottom - rc.top;

	Width		= (Width/4)*4;

	memDC	= CreateCompatibleDC(hdc);
	memBM	= CreateCompatibleBitmap(hdc, Width, Height);
	hOld	= (HBITMAP) SelectObject (memDC, memBM);
	BitBlt( memDC, 0, 0, Width, Height , hdc, rc.left, rc.top , SRCCOPY );

	im = gdImageCreateTrueColor(Width, Height);
	if (im) {
		int x,y;
		for (y=0; y <= Height; y++) {
			for (x=0; x <= Width; x++) {
				int c = GetPixel(memDC, x,y);
				gdImageSetPixel(im, x, y, gdTrueColor(GetRValue(c), GetGValue(c), GetBValue(c)));
			}
		}
	}

	SelectObject(memDC,hOld);
	DeleteObject(memBM);
	DeleteDC(memDC);
	ReleaseDC( 0, hdc );

	if (!im) {
		RETURN_FALSE;
	}

	php_gd_assign_libgdimageptr_as_extgdimage(return_value, im);
}
/* }}} */
#endif /* PHP_WIN32 */

/* {{{ Rotate an image using a custom angle */
PHP_FUNCTION(imagerotate)
{
	zval *SIM;
	gdImagePtr im_dst, im_src;
	double degrees;
	zend_long color;

	ZEND_PARSE_PARAMETERS_START(3, 3)
		Z_PARAM_OBJECT_OF_CLASS(SIM, gd_image_ce)
		Z_PARAM_DOUBLE(degrees)
		Z_PARAM_LONG(color)
	ZEND_PARSE_PARAMETERS_END();

	if (degrees < (double)(INT_MIN / 100) || degrees > (double)(INT_MAX / 100)) {
		zend_argument_value_error(2, "must be between %d and %d", (INT_MIN / 100), (INT_MAX / 100));
		RETURN_THROWS();
	}

	im_src = php_gd_libgdimageptr_from_zval_p(SIM);
	im_dst = gdImageRotateInterpolated(im_src, (const float)degrees, color);

	if (im_dst == NULL) {
		RETURN_FALSE;
	}

	php_gd_assign_libgdimageptr_as_extgdimage(return_value, im_dst);
}
/* }}} */

/* {{{ Set the tile image to $tile when filling $image with the "IMG_COLOR_TILED" color */
PHP_FUNCTION(imagesettile)
{
	zval *IM, *TILE;
	gdImagePtr im, tile;

	ZEND_PARSE_PARAMETERS_START(2, 2)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_OBJECT_OF_CLASS(TILE, gd_image_ce)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);
	tile = php_gd_libgdimageptr_from_zval_p(TILE);

	gdImageSetTile(im, tile);

	RETURN_TRUE;
}
/* }}} */

/* {{{ Set the brush image to $brush when filling $image with the "IMG_COLOR_BRUSHED" color */
PHP_FUNCTION(imagesetbrush)
{
	zval *IM, *TILE;
	gdImagePtr im, tile;

	ZEND_PARSE_PARAMETERS_START(2, 2)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_OBJECT_OF_CLASS(TILE, gd_image_ce)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);
	tile = php_gd_libgdimageptr_from_zval_p(TILE);

	gdImageSetBrush(im, tile);

	RETURN_TRUE;
}
/* }}} */

/* {{{ Create a new image */
PHP_FUNCTION(imagecreate)
{
	zend_long x_size, y_size;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(2, 2)
		Z_PARAM_LONG(x_size)
		Z_PARAM_LONG(y_size)
	ZEND_PARSE_PARAMETERS_END();

	if (x_size <= 0 || x_size >= INT_MAX) {
		zend_argument_value_error(1, "must be greater than 0");
		RETURN_THROWS();
	}

	if (y_size <= 0 || y_size >= INT_MAX) {
		zend_argument_value_error(2, "must be greater than 0");
		RETURN_THROWS();
	}

	im = gdImageCreate(x_size, y_size);

	if (!im) {
		RETURN_FALSE;
	}

	php_gd_assign_libgdimageptr_as_extgdimage(return_value, im);
}
/* }}} */

/* {{{ Return the types of images supported in a bitfield - 1=GIF, 2=JPEG, 4=PNG, 8=WBMP, 16=XPM, etc */
PHP_FUNCTION(imagetypes)
{
	int ret = 0;
	ret = PHP_IMG_GIF;
#ifdef HAVE_GD_JPG
	ret |= PHP_IMG_JPG;
#endif
#ifdef HAVE_GD_PNG
	ret |= PHP_IMG_PNG;
#endif
	ret |= PHP_IMG_WBMP;
#ifdef HAVE_GD_XPM
	ret |= PHP_IMG_XPM;
#endif
#ifdef HAVE_GD_WEBP
	ret |= PHP_IMG_WEBP;
#endif
	ret |= PHP_IMG_BMP;
	ret |= PHP_IMG_TGA;
#ifdef HAVE_GD_AVIF
	ret |= PHP_IMG_AVIF;
#endif

	ZEND_PARSE_PARAMETERS_NONE();

	RETURN_LONG(ret);
}
/* }}} */

/* {{{ _php_image_type
 * Based on ext/standard/image.c
 */
static const char php_sig_gd2[3] = {'g', 'd', '2'};

static int _php_image_type(zend_string *data)
{
	if (ZSTR_LEN(data) < 12) {
		/* Handle this the same way as an unknown image type. */
		return -1;
	}

	if (!memcmp(ZSTR_VAL(data), php_sig_gd2, sizeof(php_sig_gd2))) {
		return PHP_GDIMG_TYPE_GD2;
	} else if (!memcmp(ZSTR_VAL(data), php_sig_jpg, sizeof(php_sig_jpg))) {
		return PHP_GDIMG_TYPE_JPG;
	} else if (!memcmp(ZSTR_VAL(data), php_sig_png, sizeof(php_sig_png))) {
		return PHP_GDIMG_TYPE_PNG;
	} else if (!memcmp(ZSTR_VAL(data), php_sig_gif, sizeof(php_sig_gif))) {
		return PHP_GDIMG_TYPE_GIF;
	} else if (!memcmp(ZSTR_VAL(data), php_sig_bmp, sizeof(php_sig_bmp))) {
		return PHP_GDIMG_TYPE_BMP;
	} else if(!memcmp(ZSTR_VAL(data), php_sig_riff, sizeof(php_sig_riff)) && !memcmp(ZSTR_VAL(data) + sizeof(php_sig_riff) + sizeof(uint32_t), php_sig_webp, sizeof(php_sig_webp))) {
		return PHP_GDIMG_TYPE_WEBP;
	}

	php_stream *image_stream = php_stream_memory_open(TEMP_STREAM_READONLY, data);

	if (image_stream != NULL) {
		bool is_avif = php_is_image_avif(image_stream);
		php_stream_close(image_stream);

		if (is_avif) {
			return PHP_GDIMG_TYPE_AVIF;
		}
	}

	if (ZSTR_VAL(data)[0] == 0) {
		return PHP_GDIMG_TYPE_WBM;
	}

	return -1;
}
/* }}} */

/* {{{ _php_image_create_from_string */
gdImagePtr _php_image_create_from_string(zend_string *data, const char *tn, gdImagePtr (*ioctx_func_p)(gdIOCtxPtr))
{
	gdImagePtr im;
	gdIOCtx *io_ctx;

	ZEND_ASSERT(ZSTR_LEN(data) <= INT_MAX); /* checked in imagecreatefromstring() */
	io_ctx = gdNewDynamicCtxEx((int) ZSTR_LEN(data), ZSTR_VAL(data), 0);

	if (!io_ctx) {
		return NULL;
	}

	im = (*ioctx_func_p)(io_ctx);
	if (!im) {
		php_error_docref(NULL, E_WARNING, "Passed data is not in \"%s\" format", tn);
		io_ctx->gd_free(io_ctx);
		return NULL;
	}

	io_ctx->gd_free(io_ctx);

	return im;
}
/* }}} */

/* {{{ Create a new image from the image stream in the string */
PHP_FUNCTION(imagecreatefromstring)
{
	zend_string *data;
	gdImagePtr im;
	int imtype;

	ZEND_PARSE_PARAMETERS_START(1, 1)
		Z_PARAM_STR(data)
	ZEND_PARSE_PARAMETERS_END();

	if (ZSTR_LEN(data) > INT_MAX) {
		zend_argument_value_error(1, "is too long");
	}

	imtype = _php_image_type(data);

	switch (imtype) {
		case PHP_GDIMG_TYPE_JPG:
#ifdef HAVE_GD_JPG
			im = _php_image_create_from_string(data, "JPEG", gdImageCreateFromJpegCtx);
#else
			php_error_docref(NULL, E_WARNING, "No JPEG support in this PHP build");
			RETURN_FALSE;
#endif
			break;

		case PHP_GDIMG_TYPE_PNG:
#ifdef HAVE_GD_PNG
			im = _php_image_create_from_string(data, "PNG", gdImageCreateFromPngCtx);
#else
			php_error_docref(NULL, E_WARNING, "No PNG support in this PHP build");
			RETURN_FALSE;
#endif
			break;

		case PHP_GDIMG_TYPE_GIF:
			im = _php_image_create_from_string(data, "GIF", gdImageCreateFromGifCtx);
			break;

		case PHP_GDIMG_TYPE_WBM:
			im = _php_image_create_from_string(data, "WBMP", gdImageCreateFromWBMPCtx);
			break;

		case PHP_GDIMG_TYPE_GD2:
			im = _php_image_create_from_string(data, "GD2", gdImageCreateFromGd2Ctx);
			break;

		case PHP_GDIMG_TYPE_BMP:
			im = _php_image_create_from_string(data, "BMP", gdImageCreateFromBmpCtx);
			break;

		case PHP_GDIMG_TYPE_WEBP:
#ifdef HAVE_GD_WEBP
			im = _php_image_create_from_string(data, "WEBP", gdImageCreateFromWebpCtx);
			break;
#else
			php_error_docref(NULL, E_WARNING, "No WEBP support in this PHP build");
			RETURN_FALSE;
#endif

		case PHP_GDIMG_TYPE_AVIF:
#ifdef HAVE_GD_AVIF
			im = _php_image_create_from_string(data, "AVIF", gdImageCreateFromAvifCtx);
			break;
#else
			php_error_docref(NULL, E_WARNING, "No AVIF support in this PHP build");
			RETURN_FALSE;
#endif

		default:
			php_error_docref(NULL, E_WARNING, "Data is not in a recognized format");
			RETURN_FALSE;
	}

	if (!im) {
		php_error_docref(NULL, E_WARNING, "Couldn't create GD Image Stream out of Data");
		RETURN_FALSE;
	}

	php_gd_assign_libgdimageptr_as_extgdimage(return_value, im);
}
/* }}} */

/* {{{ _php_image_create_from */
static void _php_image_create_from(INTERNAL_FUNCTION_PARAMETERS, int image_type, const char *tn, gdImagePtr (*func_p)(FILE *), gdImagePtr (*ioctx_func_p)(gdIOCtxPtr))
{
	char *file;
	size_t file_len;
	zend_long srcx, srcy, width, height;
	gdImagePtr im = NULL;
	php_stream *stream;
	FILE * fp = NULL;
#ifdef HAVE_GD_JPG
	long ignore_warning;
#endif

	if (image_type == PHP_GDIMG_TYPE_GD2PART) {
		if (zend_parse_parameters(ZEND_NUM_ARGS(), "pllll", &file, &file_len, &srcx, &srcy, &width, &height) == FAILURE) {
			RETURN_THROWS();
		}

		if (width < 1) {
			zend_argument_value_error(4, "must be greater than or equal to 1");
			RETURN_THROWS();
		}

		if (height < 1) {
			zend_argument_value_error(5, "must be greater than or equal to 1");
			RETURN_THROWS();
		}

	} else {
		if (zend_parse_parameters(ZEND_NUM_ARGS(), "p", &file, &file_len) == FAILURE) {
			RETURN_THROWS();
		}
	}


	stream = php_stream_open_wrapper(file, "rb", REPORT_ERRORS|IGNORE_PATH, NULL);
	if (stream == NULL)	{
		RETURN_FALSE;
	}

	/* try and avoid allocating a FILE* if the stream is not naturally a FILE* */
	if (php_stream_is(stream, PHP_STREAM_IS_STDIO))	{
		if (FAILURE == php_stream_cast(stream, PHP_STREAM_AS_STDIO, (void**)&fp, REPORT_ERRORS)) {
			goto out_err;
		}
	} else if (ioctx_func_p || image_type == PHP_GDIMG_TYPE_GD2PART) {
		/* we can create an io context */
		gdIOCtx* io_ctx;
		zend_string *buff;
		char *pstr;

		buff = php_stream_copy_to_mem(stream, PHP_STREAM_COPY_ALL, 0);

		if (!buff) {
			php_error_docref(NULL, E_WARNING, "Cannot read image data");
			goto out_err;
		}

		if (ZSTR_LEN(buff) > INT_MAX) {
			zend_string_release_ex(buff, 0);
			php_error_docref(NULL, E_WARNING, "Cannot read images with more than %d bytes", INT_MAX);
			goto out_err;
		}

		/* needs to be malloc (persistent) - GD will free() it later */
		pstr = pestrndup(ZSTR_VAL(buff), ZSTR_LEN(buff), 1);
		io_ctx = gdNewDynamicCtxEx((int) ZSTR_LEN(buff), pstr, 0);
		if (!io_ctx) {
			pefree(pstr, 1);
			zend_string_release_ex(buff, 0);
			php_error_docref(NULL, E_WARNING, "Cannot allocate GD IO context");
			goto out_err;
		}

		if (image_type == PHP_GDIMG_TYPE_GD2PART) {
			im = gdImageCreateFromGd2PartCtx(io_ctx, srcx, srcy, width, height);
		} else {
			im = (*ioctx_func_p)(io_ctx);
		}
		io_ctx->gd_free(io_ctx);
		pefree(pstr, 1);
		zend_string_release_ex(buff, 0);
	}
	else if (php_stream_can_cast(stream, PHP_STREAM_AS_STDIO) == SUCCESS) {
		/* try and force the stream to be FILE* */
		if (FAILURE == php_stream_cast(stream, PHP_STREAM_AS_STDIO | PHP_STREAM_CAST_TRY_HARD, (void **) &fp, REPORT_ERRORS)) {
			goto out_err;
		}
	}

	if (!im && fp) {
		switch (image_type) {
			case PHP_GDIMG_TYPE_GD2PART:
				im = gdImageCreateFromGd2Part(fp, srcx, srcy, width, height);
				break;
#ifdef HAVE_GD_XPM
			case PHP_GDIMG_TYPE_XPM:
				im = gdImageCreateFromXpm(file);
				break;
#endif

#ifdef HAVE_GD_JPG
			case PHP_GDIMG_TYPE_JPG:
				ignore_warning = INI_INT("gd.jpeg_ignore_warning");
				im = gdImageCreateFromJpegEx(fp, ignore_warning);
			break;
#endif

			default:
				im = (*func_p)(fp);
				break;
		}

		fflush(fp);
	}

/* register_im: */
	if (im) {
		php_stream_close(stream);
		php_gd_assign_libgdimageptr_as_extgdimage(return_value, im);
		return;
	}

	php_error_docref(NULL, E_WARNING, "\"%s\" is not a valid %s file", file, tn);
out_err:
	php_stream_close(stream);
	RETURN_FALSE;

}
/* }}} */

/* {{{ Create a new image from GIF file or URL */
PHP_FUNCTION(imagecreatefromgif)
{
	_php_image_create_from(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_GDIMG_TYPE_GIF, "GIF", gdImageCreateFromGif, gdImageCreateFromGifCtx);
}
/* }}} */

#ifdef HAVE_GD_JPG
/* {{{ Create a new image from JPEG file or URL */
PHP_FUNCTION(imagecreatefromjpeg)
{
	_php_image_create_from(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_GDIMG_TYPE_JPG, "JPEG", gdImageCreateFromJpeg, gdImageCreateFromJpegCtx);
}
/* }}} */
#endif /* HAVE_GD_JPG */

#ifdef HAVE_GD_PNG
/* {{{ Create a new image from PNG file or URL */
PHP_FUNCTION(imagecreatefrompng)
{
	_php_image_create_from(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_GDIMG_TYPE_PNG, "PNG", gdImageCreateFromPng, gdImageCreateFromPngCtx);
}
/* }}} */
#endif /* HAVE_GD_PNG */

#ifdef HAVE_GD_WEBP
/* {{{ Create a new image from WEBP file or URL */
PHP_FUNCTION(imagecreatefromwebp)
{
	_php_image_create_from(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_GDIMG_TYPE_WEBP, "WEBP", gdImageCreateFromWebp, gdImageCreateFromWebpCtx);
}
/* }}} */
#endif /* HAVE_GD_WEBP */

/* {{{ Create a new image from XBM file or URL */
PHP_FUNCTION(imagecreatefromxbm)
{
	_php_image_create_from(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_GDIMG_TYPE_XBM, "XBM", gdImageCreateFromXbm, NULL);
}
/* }}} */

#ifdef HAVE_GD_AVIF
/* {{{ Create a new image from AVIF file or URL */
PHP_FUNCTION(imagecreatefromavif)
{
	_php_image_create_from(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_GDIMG_TYPE_AVIF, "AVIF", gdImageCreateFromAvif, gdImageCreateFromAvifCtx);
}
/* }}} */
#endif /* HAVE_GD_AVIF */

#ifdef HAVE_GD_XPM
/* {{{ Create a new image from XPM file or URL */
PHP_FUNCTION(imagecreatefromxpm)
{
	_php_image_create_from(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_GDIMG_TYPE_XPM, "XPM", NULL, NULL);
}
/* }}} */
#endif

/* {{{ Create a new image from WBMP file or URL */
PHP_FUNCTION(imagecreatefromwbmp)
{
	_php_image_create_from(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_GDIMG_TYPE_WBM, "WBMP", gdImageCreateFromWBMP, gdImageCreateFromWBMPCtx);
}
/* }}} */

/* {{{ Create a new image from GD file or URL */
PHP_FUNCTION(imagecreatefromgd)
{
	_php_image_create_from(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_GDIMG_TYPE_GD, "GD", gdImageCreateFromGd, gdImageCreateFromGdCtx);
}
/* }}} */

/* {{{ Create a new image from GD2 file or URL */
PHP_FUNCTION(imagecreatefromgd2)
{
	_php_image_create_from(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_GDIMG_TYPE_GD2, "GD2", gdImageCreateFromGd2, gdImageCreateFromGd2Ctx);
}
/* }}} */

/* {{{ Create a new image from a given part of GD2 file or URL */
PHP_FUNCTION(imagecreatefromgd2part)
{
	_php_image_create_from(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_GDIMG_TYPE_GD2PART, "GD2", NULL, NULL);
}
/* }}} */

/* {{{ Create a new image from BMP file or URL */
PHP_FUNCTION(imagecreatefrombmp)
{
	_php_image_create_from(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_GDIMG_TYPE_BMP, "BMP", gdImageCreateFromBmp, gdImageCreateFromBmpCtx);
}
/* }}} */

/* {{{ Create a new image from TGA file or URL */
PHP_FUNCTION(imagecreatefromtga)
{
	_php_image_create_from(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_GDIMG_TYPE_TGA, "TGA", gdImageCreateFromTga, gdImageCreateFromTgaCtx);
}
/* }}} */

/* {{{ _php_image_output */
static void _php_image_output(INTERNAL_FUNCTION_PARAMETERS, int image_type, const char *tn)
{
	zval *imgind;
	char *file = NULL;
	zend_long quality = 128, type = 1;
	gdImagePtr im;
	size_t file_len = 0;

	/* The quality parameter for gd2 stands for chunk size */

	switch (image_type) {
		case PHP_GDIMG_TYPE_GD:
			if (zend_parse_parameters(ZEND_NUM_ARGS(), "O|p!", &imgind, gd_image_ce, &file, &file_len) == FAILURE) {
				RETURN_THROWS();
			}
			break;
		case PHP_GDIMG_TYPE_GD2:
			if (zend_parse_parameters(ZEND_NUM_ARGS(), "O|p!ll", &imgind, gd_image_ce, &file, &file_len, &quality, &type) == FAILURE) {
				RETURN_THROWS();
			}
			break;
		EMPTY_SWITCH_DEFAULT_CASE()
	}

	/* quality must fit in an int */
	if (quality < INT_MIN || quality > INT_MAX) {
		php_error_docref(NULL, E_WARNING, "Argument #3 ($chunk_size) must be between %d and %d", INT_MIN, INT_MAX);
		RETURN_FALSE;
	}

	im = php_gd_libgdimageptr_from_zval_p(imgind);

	if (file_len) {
		PHP_GD_CHECK_OPEN_BASEDIR(file, "Invalid filename");

		FILE *fp = VCWD_FOPEN(file, "wb");
		if (!fp) {
			php_error_docref(NULL, E_WARNING, "Unable to open \"%s\" for writing", file);
			RETURN_FALSE;
		}

		switch (image_type) {
			case PHP_GDIMG_TYPE_GD:
				gdImageGd(im, fp);
				break;
			case PHP_GDIMG_TYPE_GD2:
				if (quality == -1) {
					quality = 128;
				}
				gdImageGd2(im, fp, quality, type);
				break;
			EMPTY_SWITCH_DEFAULT_CASE()
		}
		fflush(fp);
		fclose(fp);
	} else {
		size_t b;
		FILE *tmp;
		char  buf[4096];
		zend_string *path;

		tmp = php_open_temporary_file(NULL, NULL, &path);
		if (tmp == NULL) {
			php_error_docref(NULL, E_WARNING, "Unable to open temporary file");
			RETURN_FALSE;
		}

		switch (image_type) {
			case PHP_GDIMG_TYPE_GD:
				gdImageGd(im, tmp);
				break;
			case PHP_GDIMG_TYPE_GD2:
				if (quality == -1) {
					quality = 128;
				}
				gdImageGd2(im, tmp, quality, type);
				break;
			EMPTY_SWITCH_DEFAULT_CASE()
		}

		fseek(tmp, 0, SEEK_SET);

		while ((b = fread(buf, 1, sizeof(buf), tmp)) > 0) {
			php_write(buf, b);
		}

		fclose(tmp);
		VCWD_UNLINK((const char *)ZSTR_VAL(path)); /* make sure that the temporary file is removed */
		zend_string_release_ex(path, 0);
	}
	RETURN_TRUE;
}
/* }}} */

/* {{{ Output XBM image to browser or file */
PHP_FUNCTION(imagexbm)
{
	zval *imgind;
	char *file = NULL;
	size_t file_len = 0;
	zend_long foreground_color;
	bool foreground_color_is_null = true;
	gdImagePtr im;
	gdIOCtx *ctx = NULL;

	ZEND_PARSE_PARAMETERS_START(2, 3)
		Z_PARAM_OBJECT_OF_CLASS(imgind, gd_image_ce)
		Z_PARAM_PATH_OR_NULL(file, file_len)
		Z_PARAM_OPTIONAL
		Z_PARAM_LONG_OR_NULL(foreground_color, foreground_color_is_null)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(imgind);

	if (file != NULL) {
		php_stream *stream = php_stream_open_wrapper(file, "wb", REPORT_ERRORS|IGNORE_PATH, NULL);
		if (stream == NULL) {
			RETURN_FALSE;
		}

		ctx = create_stream_context(stream, 1);
	} else {
		ctx = create_output_context(NULL, 0);
	}

	if (foreground_color_is_null) {
		int i;
		for (i = 0; i < gdImageColorsTotal(im); i++) {
			if (!gdImageRed(im, i) && !gdImageGreen(im, i) && !gdImageBlue(im, i)) {
				break;
			}
		}

		foreground_color = i;
	}

	gdImageXbmCtx(im, file ? file : "", (int) foreground_color, ctx);

	ctx->gd_free(ctx);

	RETURN_TRUE;
}
/* }}} */

/* {{{ Output GIF image to browser or file */
PHP_FUNCTION(imagegif)
{
	zval *imgind;
	gdImagePtr im;
	gdIOCtx *ctx;
	zval *to_zval = NULL;

	if (zend_parse_parameters(ZEND_NUM_ARGS(), "O|z!", &imgind, gd_image_ce, &to_zval) == FAILURE) {
		RETURN_THROWS();
	}

	im = php_gd_libgdimageptr_from_zval_p(imgind);

	ctx = create_output_context(to_zval, 2);
	if (!ctx) {
		RETURN_FALSE;
	}

	gdImageGifCtx(im, ctx);

	ctx->gd_free(ctx);

	RETURN_TRUE;
}
/* }}} */

#ifdef HAVE_GD_PNG
/* {{{ Output PNG image to browser or file */
PHP_FUNCTION(imagepng)
{
	zval *imgind;
	zend_long quality = -1, basefilter = -1;
	gdImagePtr im;
	gdIOCtx *ctx;
	zval *to_zval = NULL;

	if (zend_parse_parameters(ZEND_NUM_ARGS(), "O|z!ll", &imgind, gd_image_ce, &to_zval, &quality, &basefilter) == FAILURE) {
		RETURN_THROWS();
	}

	im = php_gd_libgdimageptr_from_zval_p(imgind);

	ctx = create_output_context(to_zval, 2);
	if (!ctx) {
		RETURN_FALSE;
	}

	if (quality < -1 || quality > 9) {
		zend_argument_value_error(3, "must be between -1 and 9");
		ctx->gd_free(ctx);
		RETURN_THROWS();
	}

#ifdef HAVE_GD_BUNDLED
	gdImagePngCtxEx(im, ctx, (int) quality, (int) basefilter);
#else
	gdImagePngCtxEx(im, ctx, (int) quality);
#endif

	ctx->gd_free(ctx);

	RETURN_TRUE;
}
/* }}} */
#endif /* HAVE_GD_PNG */

#ifdef HAVE_GD_WEBP
/* {{{ Output WEBP image to browser or file */
PHP_FUNCTION(imagewebp)
{
	zval *imgind;
	zend_long quality = -1;
	gdImagePtr im;
	gdIOCtx *ctx;
	zval *to_zval = NULL;

	if (zend_parse_parameters(ZEND_NUM_ARGS(), "O|z!l", &imgind, gd_image_ce, &to_zval, &quality) == FAILURE) {
		RETURN_THROWS();
	}

	im = php_gd_libgdimageptr_from_zval_p(imgind);

	ctx = create_output_context(to_zval, 2);
	if (!ctx) {
		RETURN_FALSE;
	}

	if (quality < -1) {
		zend_argument_value_error(3, "must be greater than or equal to -1");
		ctx->gd_free(ctx);
		RETURN_THROWS();
	}

	gdImageWebpCtx(im, ctx, (int) quality);

	ctx->gd_free(ctx);

	RETURN_TRUE;
}
/* }}} */
#endif /* HAVE_GD_WEBP */

#ifdef HAVE_GD_AVIF
/* {{{ Output AVIF image to browser or file */
PHP_FUNCTION(imageavif)
{
	zval *imgind;
	zend_long quality = -1, speed = -1;
	gdImagePtr im;
	gdIOCtx *ctx;
	zval *to_zval = NULL;

	if (zend_parse_parameters(ZEND_NUM_ARGS(), "O|z!ll", &imgind, gd_image_ce, &to_zval, &quality, &speed) == FAILURE) {
		RETURN_THROWS();
	}

	im = php_gd_libgdimageptr_from_zval_p(imgind);

	ctx = create_output_context(to_zval, 2);
	if (!ctx) {
		RETURN_FALSE;
	}

	if (quality < -1 || quality > 100) {
		zend_argument_value_error(3, "must be between -1 and 100");
		ctx->gd_free(ctx);
		RETURN_THROWS();
	}

	if (speed < -1 || speed > 10) {
		zend_argument_value_error(4, "must be between -1 and 10");
		ctx->gd_free(ctx);
		RETURN_THROWS();
	} else if (speed == -1) {
		speed = 6;
	}

	gdImageAvifCtx(im, ctx, (int) quality, (int) speed);

	ctx->gd_free(ctx);

	RETURN_TRUE;
}
/* }}} */
#endif /* HAVE_GD_AVIF */

#ifdef HAVE_GD_JPG
/* {{{ Output JPEG image to browser or file */
PHP_FUNCTION(imagejpeg)
{
	zval *imgind;
	zend_long quality = -1;
	gdImagePtr im;
	gdIOCtx *ctx;
	zval *to_zval = NULL;

	if (zend_parse_parameters(ZEND_NUM_ARGS(), "O|z!l", &imgind, gd_image_ce, &to_zval, &quality) == FAILURE) {
		RETURN_THROWS();
	}

	im = php_gd_libgdimageptr_from_zval_p(imgind);

	ctx = create_output_context(to_zval, 2);
	if (!ctx) {
		RETURN_FALSE;
	}

	if (quality < -1 || quality > 100) {
		zend_argument_value_error(3, "must be at between -1 and 100");
		ctx->gd_free(ctx);
		RETURN_THROWS();
	}

	gdImageJpegCtx(im, ctx, (int) quality);

	ctx->gd_free(ctx);

	RETURN_TRUE;
}
/* }}} */
#endif /* HAVE_GD_JPG */

/* {{{ Output WBMP image to browser or file */
PHP_FUNCTION(imagewbmp)
{
	zval *imgind;
	zend_long foreground_color;
	bool foreground_color_is_null = true;
	gdImagePtr im;
	gdIOCtx *ctx;
	zval *to_zval = NULL;

	ZEND_PARSE_PARAMETERS_START(1, 3)
		Z_PARAM_OBJECT_OF_CLASS(imgind, gd_image_ce)
		Z_PARAM_OPTIONAL
		Z_PARAM_ZVAL_OR_NULL(to_zval)
		Z_PARAM_LONG_OR_NULL(foreground_color, foreground_color_is_null)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(imgind);

	ctx = create_output_context(to_zval, 2);
	if (!ctx) {
		RETURN_FALSE;
	}

	if (foreground_color_is_null) {
		int i;
		for (i = 0; i < gdImageColorsTotal(im); i++) {
			if (!gdImageRed(im, i) && !gdImageGreen(im, i) && !gdImageBlue(im, i)) {
				break;
			}
		}

		foreground_color = i;
	}

	gdImageWBMPCtx(im, foreground_color, ctx);

	ctx->gd_free(ctx);

	RETURN_TRUE;
}
/* }}} */

/* {{{ Output GD image to browser or file */
PHP_FUNCTION(imagegd)
{
	_php_image_output(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_GDIMG_TYPE_GD, "GD");
}
/* }}} */

/* {{{ Output GD2 image to browser or file */
PHP_FUNCTION(imagegd2)
{
	_php_image_output(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_GDIMG_TYPE_GD2, "GD2");
}
/* }}} */

/* {{{ Output BMP image to browser or file */
PHP_FUNCTION(imagebmp)
{
	zval *imgind;
	bool compressed = true;
	gdImagePtr im;
	gdIOCtx *ctx;
	zval *to_zval = NULL;

	ZEND_PARSE_PARAMETERS_START(1, 3)
		Z_PARAM_OBJECT_OF_CLASS(imgind, gd_image_ce)
		Z_PARAM_OPTIONAL
		Z_PARAM_ZVAL_OR_NULL(to_zval)
		Z_PARAM_BOOL(compressed)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(imgind);

	ctx = create_output_context(to_zval, 2);
	if (!ctx) {
		RETURN_FALSE;
	}

	gdImageBmpCtx(im, ctx, (int) compressed);

	ctx->gd_free(ctx);

	RETURN_TRUE;
}
/* }}} */

/* {{{ Destroy an image - No effect as of PHP 8.0 */
PHP_FUNCTION(imagedestroy)
{
	/* This function used to free the resource, as resources are no longer used, it does nothing */
	zval *IM;

	ZEND_PARSE_PARAMETERS_START(1, 1)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
	ZEND_PARSE_PARAMETERS_END();

	RETURN_TRUE;
}
/* }}} */

/* {{{ Allocate a color for an image */
PHP_FUNCTION(imagecolorallocate)
{
	zval *IM;
	zend_long red, green, blue;
	gdImagePtr im;
	int ct = -1;

	ZEND_PARSE_PARAMETERS_START(4, 4)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(red)
		Z_PARAM_LONG(green)
		Z_PARAM_LONG(blue)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	CHECK_RGBA_RANGE(red, Red, 2);
	CHECK_RGBA_RANGE(green, Green, 3);
	CHECK_RGBA_RANGE(blue, Blue, 4);

	ct = gdImageColorAllocate(im, red, green, blue);
	if (ct < 0) {
		RETURN_FALSE;
	}
	RETURN_LONG(ct);
}
/* }}} */

/* {{{ Copy the palette from the src image onto the dst image */
PHP_FUNCTION(imagepalettecopy)
{
	zval *dstim, *srcim;
	gdImagePtr dst, src;

	ZEND_PARSE_PARAMETERS_START(2, 2)
		Z_PARAM_OBJECT_OF_CLASS(dstim, gd_image_ce)
		Z_PARAM_OBJECT_OF_CLASS(srcim, gd_image_ce)
	ZEND_PARSE_PARAMETERS_END();

	src = php_gd_libgdimageptr_from_zval_p(srcim);
	dst = php_gd_libgdimageptr_from_zval_p(dstim);

	gdImagePaletteCopy(dst, src);
}
/* }}} */

/* {{{ Get the index of the color of a pixel */
PHP_FUNCTION(imagecolorat)
{
	zval *IM;
	zend_long x, y;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(3, 3)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(x)
		Z_PARAM_LONG(y)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	if (gdImageTrueColor(im)) {
		if (im->tpixels && gdImageBoundsSafe(im, x, y)) {
			RETURN_LONG(gdImageTrueColorPixel(im, x, y));
		} else {
			php_error_docref(NULL, E_NOTICE, "" ZEND_LONG_FMT "," ZEND_LONG_FMT " is out of bounds", x, y);
			RETURN_FALSE;
		}
	} else {
		if (im->pixels && gdImageBoundsSafe(im, x, y)) {
			RETURN_LONG(im->pixels[y][x]);
		} else {
			php_error_docref(NULL, E_NOTICE, "" ZEND_LONG_FMT "," ZEND_LONG_FMT " is out of bounds", x, y);
			RETURN_FALSE;
		}
	}
}
/* }}} */

/* {{{ Get the index of the closest color to the specified color */
PHP_FUNCTION(imagecolorclosest)
{
	zval *IM;
	zend_long red, green, blue;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(4, 4)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(red)
		Z_PARAM_LONG(green)
		Z_PARAM_LONG(blue)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	CHECK_RGBA_RANGE(red, Red, 2);
	CHECK_RGBA_RANGE(green, Green, 3);
	CHECK_RGBA_RANGE(blue, Blue, 4);

	RETURN_LONG(gdImageColorClosest(im, red, green, blue));
}
/* }}} */

/* {{{ Get the index of the color which has the hue, white and blackness nearest to the given color */
PHP_FUNCTION(imagecolorclosesthwb)
{
	zval *IM;
	zend_long red, green, blue;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(4, 4)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(red)
		Z_PARAM_LONG(green)
		Z_PARAM_LONG(blue)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	CHECK_RGBA_RANGE(red, Red, 2);
	CHECK_RGBA_RANGE(green, Green, 3);
	CHECK_RGBA_RANGE(blue, Blue, 4);

	RETURN_LONG(gdImageColorClosestHWB(im, red, green, blue));
}
/* }}} */

/* {{{ De-allocate a color for an image */
PHP_FUNCTION(imagecolordeallocate)
{
	zval *IM;
	zend_long index;
	int col;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(2, 2)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(index)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	/* We can return right away for a truecolor image as deallocating colours is meaningless here */
	if (gdImageTrueColor(im)) {
		RETURN_TRUE;
	}

	col = index;

	if (col >= 0 && col < gdImageColorsTotal(im)) {
		gdImageColorDeallocate(im, col);
		RETURN_TRUE;
	} else {
		zend_argument_value_error(2, "must be between 0 and %d", gdImageColorsTotal(im));
		RETURN_THROWS();
	}
}
/* }}} */

/* {{{ Get the index of the specified color or its closest possible alternative */
PHP_FUNCTION(imagecolorresolve)
{
	zval *IM;
	zend_long red, green, blue;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(4, 4)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(red)
		Z_PARAM_LONG(green)
		Z_PARAM_LONG(blue)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	CHECK_RGBA_RANGE(red, Red, 2);
	CHECK_RGBA_RANGE(green, Green, 3);
	CHECK_RGBA_RANGE(blue, Blue, 4);

	RETURN_LONG(gdImageColorResolve(im, red, green, blue));
}
/* }}} */

/* {{{ Get the index of the specified color */
PHP_FUNCTION(imagecolorexact)
{
	zval *IM;
	zend_long red, green, blue;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(4, 4)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(red)
		Z_PARAM_LONG(green)
		Z_PARAM_LONG(blue)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	CHECK_RGBA_RANGE(red, Red, 2);
	CHECK_RGBA_RANGE(green, Green, 3);
	CHECK_RGBA_RANGE(blue, Blue, 4);

	RETURN_LONG(gdImageColorExact(im, red, green, blue));
}
/* }}} */

/* {{{ Set the color for the specified palette index */
PHP_FUNCTION(imagecolorset)
{
	zval *IM;
	zend_long color, red, green, blue, alpha = 0;
	int col;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(5, 6)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(color)
		Z_PARAM_LONG(red)
		Z_PARAM_LONG(green)
		Z_PARAM_LONG(blue)
		Z_PARAM_OPTIONAL
		Z_PARAM_LONG(alpha)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	CHECK_RGBA_RANGE(red, Red, 3);
	CHECK_RGBA_RANGE(green, Green, 4);
	CHECK_RGBA_RANGE(blue, Blue, 5);
	CHECK_RGBA_RANGE(alpha, Alpha, 6);

	col = color;

	if (col >= 0 && col < gdImageColorsTotal(im)) {
		im->red[col]   = red;
		im->green[col] = green;
		im->blue[col]  = blue;
		im->alpha[col]  = alpha;
	} else {
		RETURN_FALSE;
	}
}
/* }}} */

/* {{{ Get the colors for an index */
PHP_FUNCTION(imagecolorsforindex)
{
	zval *IM;
	zend_long index;
	int col;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(2, 2)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(index)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	col = index;

	if ((col >= 0 && gdImageTrueColor(im)) || (!gdImageTrueColor(im) && col >= 0 && col < gdImageColorsTotal(im))) {
		array_init_size(return_value, 4);

		add_assoc_long(return_value,"red",  gdImageRed(im,col));
		add_assoc_long(return_value,"green", gdImageGreen(im,col));
		add_assoc_long(return_value,"blue", gdImageBlue(im,col));
		add_assoc_long(return_value,"alpha", gdImageAlpha(im,col));
	} else {
		zend_argument_value_error(2, "is out of range");
		RETURN_THROWS();
	}
}
/* }}} */

/* {{{ Apply a gamma correction to a GD image */
PHP_FUNCTION(imagegammacorrect)
{
	zval *IM;
	gdImagePtr im;
	double input, output, gamma;

	ZEND_PARSE_PARAMETERS_START(3, 3)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_DOUBLE(input)
		Z_PARAM_DOUBLE(output)
	ZEND_PARSE_PARAMETERS_END();

	if (input <= 0.0) {
		zend_argument_value_error(2, "must be greater than 0");
		RETURN_THROWS();
	}

	if (!zend_finite(input)) {
		zend_argument_value_error(2, "must be finite");
		RETURN_THROWS();
	}

	if (output <= 0.0) {
		zend_argument_value_error(3, "must be greater than 0");
		RETURN_THROWS();
	}

	if (!zend_finite(output)) {
		zend_argument_value_error(3, "must be finite");
		RETURN_THROWS();
	}

	gamma = input / output;

	im = php_gd_libgdimageptr_from_zval_p(IM);

	if (gdImageTrueColor(im))	{
		for (int y = 0; y < gdImageSY(im); y++)	{
			for (int x = 0; x < gdImageSX(im); x++)	{
				int c = gdImageGetPixel(im, x, y);
				gdImageSetPixel(im, x, y,
					gdTrueColorAlpha(
						(int) ((pow((gdTrueColorGetRed(c)   / 255.0), gamma) * 255) + .5),
						(int) ((pow((gdTrueColorGetGreen(c) / 255.0), gamma) * 255) + .5),
						(int) ((pow((gdTrueColorGetBlue(c)  / 255.0), gamma) * 255) + .5),
						gdTrueColorGetAlpha(c)
					)
				);
			}
		}
		RETURN_TRUE;
	}

	for (int i = 0; i < gdImageColorsTotal(im); i++) {
		im->red[i]   = (int)((pow((im->red[i]   / 255.0), gamma) * 255) + .5);
		im->green[i] = (int)((pow((im->green[i] / 255.0), gamma) * 255) + .5);
		im->blue[i]  = (int)((pow((im->blue[i]  / 255.0), gamma) * 255) + .5);
	}

	RETURN_TRUE;
}
/* }}} */

/* {{{ Set a single pixel */
PHP_FUNCTION(imagesetpixel)
{
	zval *IM;
	zend_long x, y, col;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(4, 4)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(x)
		Z_PARAM_LONG(y)
		Z_PARAM_LONG(col)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	gdImageSetPixel(im, x, y, col);
	RETURN_TRUE;
}
/* }}} */

/* {{{ Draw a line */
PHP_FUNCTION(imageline)
{
	zval *IM;
	zend_long x1, y1, x2, y2, col;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(6, 6)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(x1)
		Z_PARAM_LONG(y1)
		Z_PARAM_LONG(x2)
		Z_PARAM_LONG(y2)
		Z_PARAM_LONG(col)
	ZEND_PARSE_PARAMETERS_END();


	im = php_gd_libgdimageptr_from_zval_p(IM);

	if (im->AA) {
		gdImageSetAntiAliased(im, col);
		col = gdAntiAliased;
	}
	gdImageLine(im, x1, y1, x2, y2, col);
	RETURN_TRUE;
}
/* }}} */

/* {{{ Draw a dashed line */
PHP_FUNCTION(imagedashedline)
{
	zval *IM;
	zend_long x1, y1, x2, y2, col;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(6, 6)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(x1)
		Z_PARAM_LONG(y1)
		Z_PARAM_LONG(x2)
		Z_PARAM_LONG(y2)
		Z_PARAM_LONG(col)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	gdImageDashedLine(im, x1, y1, x2, y2, col);
	RETURN_TRUE;
}
/* }}} */

/* {{{ Draw a rectangle */
PHP_FUNCTION(imagerectangle)
{
	zval *IM;
	zend_long x1, y1, x2, y2, col;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(6, 6)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(x1)
		Z_PARAM_LONG(y1)
		Z_PARAM_LONG(x2)
		Z_PARAM_LONG(y2)
		Z_PARAM_LONG(col)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	gdImageRectangle(im, x1, y1, x2, y2, col);
	RETURN_TRUE;
}
/* }}} */

/* {{{ Draw a filled rectangle */
PHP_FUNCTION(imagefilledrectangle)
{
	zval *IM;
	zend_long x1, y1, x2, y2, col;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(6, 6)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(x1)
		Z_PARAM_LONG(y1)
		Z_PARAM_LONG(x2)
		Z_PARAM_LONG(y2)
		Z_PARAM_LONG(col)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);
	gdImageFilledRectangle(im, x1, y1, x2, y2, col);
	RETURN_TRUE;
}
/* }}} */

/* {{{ Draw a partial ellipse */
PHP_FUNCTION(imagearc)
{
	zval *IM;
	zend_long cx, cy, w, h, ST, E, col;
	gdImagePtr im;
	int e, st;

	ZEND_PARSE_PARAMETERS_START(8, 8)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(cx)
		Z_PARAM_LONG(cy)
		Z_PARAM_LONG(w)
		Z_PARAM_LONG(h)
		Z_PARAM_LONG(ST)
		Z_PARAM_LONG(E)
		Z_PARAM_LONG(col)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	e = E;
	if (e < 0) {
		e %= 360;
	}

	st = ST;
	if (st < 0) {
		st %= 360;
	}

	gdImageArc(im, cx, cy, w, h, st, e, col);
	RETURN_TRUE;
}
/* }}} */

/* {{{ Draw an ellipse */
PHP_FUNCTION(imageellipse)
{
	zval *IM;
	zend_long cx, cy, w, h, color;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(6, 6)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(cx)
		Z_PARAM_LONG(cy)
		Z_PARAM_LONG(w)
		Z_PARAM_LONG(h)
		Z_PARAM_LONG(color)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	gdImageEllipse(im, cx, cy, w, h, color);
	RETURN_TRUE;
}
/* }}} */

/* {{{ Flood fill to specific color */
PHP_FUNCTION(imagefilltoborder)
{
	zval *IM;
	zend_long x, y, border, col;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(5, 5)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(x)
		Z_PARAM_LONG(y)
		Z_PARAM_LONG(border)
		Z_PARAM_LONG(col)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	gdImageFillToBorder(im, x, y, border, col);
	RETURN_TRUE;
}
/* }}} */

/* {{{ Flood fill */
PHP_FUNCTION(imagefill)
{
	zval *IM;
	zend_long x, y, col;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(4, 4)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(x)
		Z_PARAM_LONG(y)
		Z_PARAM_LONG(col)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	gdImageFill(im, x, y, col);
	RETURN_TRUE;
}
/* }}} */

/* {{{ Find out the number of colors in an image's palette */
PHP_FUNCTION(imagecolorstotal)
{
	zval *IM;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(1, 1)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	RETURN_LONG(gdImageColorsTotal(im));
}
/* }}} */

/* {{{ Define a color as transparent */
PHP_FUNCTION(imagecolortransparent)
{
	zval *IM;
	zend_long COL = 0;
	bool COL_IS_NULL = true;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(1, 2)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_OPTIONAL
		Z_PARAM_LONG_OR_NULL(COL, COL_IS_NULL)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	if (!COL_IS_NULL) {
		gdImageColorTransparent(im, COL);
	}

	RETURN_LONG(gdImageGetTransparent(im));
}
/* }}} */

/* {{{ Enable or disable interlace */
PHP_FUNCTION(imageinterlace)
{
	zval *IM;
	bool INT = false;
	bool INT_IS_NULL = true;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(1, 2)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_OPTIONAL
		Z_PARAM_BOOL_OR_NULL(INT, INT_IS_NULL)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	if (!INT_IS_NULL) {
		gdImageInterlace(im, INT);
	}

	RETURN_BOOL(gdImageGetInterlaced(im));
}
/* }}} */

/* {{{ php_imagepolygon
   arg = -1 open polygon
   arg = 0  normal polygon
   arg = 1  filled polygon */
/* im, points, num_points, col */
static void php_imagepolygon(INTERNAL_FUNCTION_PARAMETERS, int filled)
{
	zval *IM, *POINTS;
	zend_long NPOINTS, COL;
	bool COL_IS_NULL = true;
	zval *var = NULL;
	gdImagePtr im;
	gdPointPtr points;
	int npoints, col, nelem;

	ZEND_PARSE_PARAMETERS_START(3, 4)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_ARRAY(POINTS)
		Z_PARAM_LONG(NPOINTS)
		Z_PARAM_OPTIONAL
		Z_PARAM_LONG_OR_NULL(COL, COL_IS_NULL)
	ZEND_PARSE_PARAMETERS_END();

	if (COL_IS_NULL) {
		COL = NPOINTS;
		NPOINTS = zend_hash_num_elements(Z_ARRVAL_P(POINTS));
		if (NPOINTS % 2 != 0) {
			zend_argument_value_error(2, "must have an even number of elements");
			RETURN_THROWS();
		}
		NPOINTS /= 2;
	} else {
		php_error_docref(NULL, E_DEPRECATED, "Using the $num_points parameter is deprecated");
	}

	im = php_gd_libgdimageptr_from_zval_p(IM);

	npoints = NPOINTS;
	col = COL;

	nelem = zend_hash_num_elements(Z_ARRVAL_P(POINTS));
	if (npoints < 3) {
		zend_argument_value_error(3, "must be greater than or equal to 3");
		RETURN_THROWS();
	}

	if (nelem < npoints * 2) {
		zend_value_error("Trying to use %d points in array with only %d points", npoints, nelem/2);
		RETURN_THROWS();
	}

	points = (gdPointPtr) safe_emalloc(npoints, sizeof(gdPoint), 0);

	for (int i = 0; i < npoints; i++) {
		if ((var = zend_hash_index_find(Z_ARRVAL_P(POINTS), (i * 2))) != NULL) {
			points[i].x = zval_get_long(var);
		}
		if ((var = zend_hash_index_find(Z_ARRVAL_P(POINTS), (i * 2) + 1)) != NULL) {
			points[i].y = zval_get_long(var);
		}
	}

	if (im->AA) {
		gdImageSetAntiAliased(im, col);
		col = gdAntiAliased;
	}
	switch (filled) {
		case -1:
			gdImageOpenPolygon(im, points, npoints, col);
			break;
		case 0:
			gdImagePolygon(im, points, npoints, col);
			break;
		case 1:
			gdImageFilledPolygon(im, points, npoints, col);
			break;
	}

	efree(points);
	RETURN_TRUE;
}
/* }}} */

/* {{{ Draw a polygon */
PHP_FUNCTION(imagepolygon)
{
	php_imagepolygon(INTERNAL_FUNCTION_PARAM_PASSTHRU, 0);
}
/* }}} */

/* {{{ Draw a polygon */
PHP_FUNCTION(imageopenpolygon)
{
	php_imagepolygon(INTERNAL_FUNCTION_PARAM_PASSTHRU, -1);
}
/* }}} */

/* {{{ Draw a filled polygon */
PHP_FUNCTION(imagefilledpolygon)
{
	php_imagepolygon(INTERNAL_FUNCTION_PARAM_PASSTHRU, 1);
}
/* }}} */

/* {{{ php_find_gd_font */
static gdFontPtr php_find_gd_font(zend_object *font_obj, zend_long font_int)
{
	if (font_obj) {
		return php_gd_font_object_from_zend_object(font_obj)->font;
	}

	switch (font_int) {
		case 1: return gdFontTiny;
		case 2: return gdFontSmall;
		case 3: return gdFontMediumBold;
		case 4: return gdFontLarge;
		case 5: return gdFontGiant;
	}

	return font_int < 1 ? gdFontTiny : gdFontGiant;
}
/* }}} */

/* {{{ php_imagefontsize
 * arg = 0  ImageFontWidth
 * arg = 1  ImageFontHeight
 */
static void php_imagefontsize(INTERNAL_FUNCTION_PARAMETERS, int arg)
{
	zend_object *font_obj = NULL;
	zend_long font_int = 0;
	gdFontPtr font;

	ZEND_PARSE_PARAMETERS_START(1, 1)
		Z_PARAM_OBJ_OF_CLASS_OR_LONG(font_obj, gd_font_ce, font_int)
	ZEND_PARSE_PARAMETERS_END();

	font = php_find_gd_font(font_obj, font_int);
	RETURN_LONG(arg ? font->h : font->w);
}
/* }}} */

/* {{{ Get font width */
PHP_FUNCTION(imagefontwidth)
{
	php_imagefontsize(INTERNAL_FUNCTION_PARAM_PASSTHRU, 0);
}
/* }}} */

/* {{{ Get font height */
PHP_FUNCTION(imagefontheight)
{
	php_imagefontsize(INTERNAL_FUNCTION_PARAM_PASSTHRU, 1);
}
/* }}} */

/* {{{ php_gdimagecharup
 * workaround for a bug in gd 1.2 */
static void php_gdimagecharup(gdImagePtr im, gdFontPtr f, int x, int y, int c, int color)
{
	int cx, cy, px, py, fline;
	cx = 0;
	cy = 0;

	if ((c < f->offset) || (c >= (f->offset + f->nchars))) {
		return;
	}

	fline = (c - f->offset) * f->h * f->w;
	for (py = y; (py > (y - f->w)); py--) {
		for (px = x; (px < (x + f->h)); px++) {
			if (f->data[fline + cy * f->w + cx]) {
				gdImageSetPixel(im, px, py, color);
			}
			cy++;
		}
		cy = 0;
		cx++;
	}
}
/* }}} */

/* {{{ php_imagechar
 * arg = 0  ImageChar
 * arg = 1  ImageCharUp
 * arg = 2  ImageString
 * arg = 3  ImageStringUp
 */
static void php_imagechar(INTERNAL_FUNCTION_PARAMETERS, int mode)
{
	zval *IM;
	zend_long X, Y, COL;
	zend_string *C;
	gdImagePtr im;
	int ch = 0, col, x, y, i;
	size_t l = 0;
	unsigned char *str = NULL;
	zend_object *font_obj = NULL;
	zend_long font_int = 0;

	ZEND_PARSE_PARAMETERS_START(6, 6)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_OBJ_OF_CLASS_OR_LONG(font_obj, gd_font_ce, font_int)
		Z_PARAM_LONG(X)
		Z_PARAM_LONG(Y)
		Z_PARAM_STR(C)
		Z_PARAM_LONG(COL)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	col = COL;

	if (mode < 2) {
		ch = (int)((unsigned char)*ZSTR_VAL(C));
	} else {
		str = (unsigned char *) estrndup(ZSTR_VAL(C), ZSTR_LEN(C));
		l = strlen((char *)str);
	}

	y = Y;
	x = X;

	gdFontPtr font = php_find_gd_font(font_obj, font_int);

	switch (mode) {
		case 0:
			gdImageChar(im, font, x, y, ch, col);
			break;
		case 1:
			php_gdimagecharup(im, font, x, y, ch, col);
			break;
		case 2:
			for (i = 0; (i < l); i++) {
				gdImageChar(im, font, x, y, (int) ((unsigned char) str[i]), col);
				x += font->w;
			}
			break;
		case 3: {
			for (i = 0; (i < l); i++) {
				/* php_gdimagecharup(im, font, x, y, (int) str[i], col); */
				gdImageCharUp(im, font, x, y, (int) str[i], col);
				y -= font->w;
			}
			break;
		}
	}
	if (str) {
		efree(str);
	}
	RETURN_TRUE;
}
/* }}} */

/* {{{ Draw a character */
PHP_FUNCTION(imagechar)
{
	php_imagechar(INTERNAL_FUNCTION_PARAM_PASSTHRU, 0);
}
/* }}} */

/* {{{ Draw a character rotated 90 degrees counter-clockwise */
PHP_FUNCTION(imagecharup)
{
	php_imagechar(INTERNAL_FUNCTION_PARAM_PASSTHRU, 1);
}
/* }}} */

/* {{{ Draw a string horizontally */
PHP_FUNCTION(imagestring)
{
	php_imagechar(INTERNAL_FUNCTION_PARAM_PASSTHRU, 2);
}
/* }}} */

/* {{{ Draw a string vertically - rotated 90 degrees counter-clockwise */
PHP_FUNCTION(imagestringup)
{
	php_imagechar(INTERNAL_FUNCTION_PARAM_PASSTHRU, 3);
}
/* }}} */

/* {{{ Copy part of an image */
PHP_FUNCTION(imagecopy)
{
	zval *SIM, *DIM;
	zend_long SX, SY, SW, SH, DX, DY;
	gdImagePtr im_dst, im_src;
	int srcH, srcW, srcY, srcX, dstY, dstX;

	ZEND_PARSE_PARAMETERS_START(8, 8)
		Z_PARAM_OBJECT_OF_CLASS(DIM, gd_image_ce)
		Z_PARAM_OBJECT_OF_CLASS(SIM, gd_image_ce)
		Z_PARAM_LONG(DX)
		Z_PARAM_LONG(DY)
		Z_PARAM_LONG(SX)
		Z_PARAM_LONG(SY)
		Z_PARAM_LONG(SW)
		Z_PARAM_LONG(SH)
	ZEND_PARSE_PARAMETERS_END();

	im_dst = php_gd_libgdimageptr_from_zval_p(DIM);
	im_src = php_gd_libgdimageptr_from_zval_p(SIM);

	srcX = SX;
	srcY = SY;
	srcH = SH;
	srcW = SW;
	dstX = DX;
	dstY = DY;

	gdImageCopy(im_dst, im_src, dstX, dstY, srcX, srcY, srcW, srcH);
	RETURN_TRUE;
}
/* }}} */

/* {{{ Merge one part of an image with another */
PHP_FUNCTION(imagecopymerge)
{
	zval *SIM, *DIM;
	zend_long SX, SY, SW, SH, DX, DY, PCT;
	gdImagePtr im_dst, im_src;
	int srcH, srcW, srcY, srcX, dstY, dstX, pct;

	ZEND_PARSE_PARAMETERS_START(9, 9)
		Z_PARAM_OBJECT_OF_CLASS(DIM, gd_image_ce)
		Z_PARAM_OBJECT_OF_CLASS(SIM, gd_image_ce)
		Z_PARAM_LONG(DX)
		Z_PARAM_LONG(DY)
		Z_PARAM_LONG(SX)
		Z_PARAM_LONG(SY)
		Z_PARAM_LONG(SW)
		Z_PARAM_LONG(SH)
		Z_PARAM_LONG(PCT)
	ZEND_PARSE_PARAMETERS_END();

	im_src = php_gd_libgdimageptr_from_zval_p(SIM);
	im_dst = php_gd_libgdimageptr_from_zval_p(DIM);

	srcX = SX;
	srcY = SY;
	srcH = SH;
	srcW = SW;
	dstX = DX;
	dstY = DY;
	pct  = PCT;

	gdImageCopyMerge(im_dst, im_src, dstX, dstY, srcX, srcY, srcW, srcH, pct);
	RETURN_TRUE;
}
/* }}} */

/* {{{ Merge one part of an image with another */
PHP_FUNCTION(imagecopymergegray)
{
	zval *SIM, *DIM;
	zend_long SX, SY, SW, SH, DX, DY, PCT;
	gdImagePtr im_dst, im_src;
	int srcH, srcW, srcY, srcX, dstY, dstX, pct;

	ZEND_PARSE_PARAMETERS_START(9, 9)
		Z_PARAM_OBJECT_OF_CLASS(DIM, gd_image_ce)
		Z_PARAM_OBJECT_OF_CLASS(SIM, gd_image_ce)
		Z_PARAM_LONG(DX)
		Z_PARAM_LONG(DY)
		Z_PARAM_LONG(SX)
		Z_PARAM_LONG(SY)
		Z_PARAM_LONG(SW)
		Z_PARAM_LONG(SH)
		Z_PARAM_LONG(PCT)
	ZEND_PARSE_PARAMETERS_END();

	im_src = php_gd_libgdimageptr_from_zval_p(SIM);
	im_dst = php_gd_libgdimageptr_from_zval_p(DIM);

	srcX = SX;
	srcY = SY;
	srcH = SH;
	srcW = SW;
	dstX = DX;
	dstY = DY;
	pct  = PCT;

	gdImageCopyMergeGray(im_dst, im_src, dstX, dstY, srcX, srcY, srcW, srcH, pct);
	RETURN_TRUE;
}
/* }}} */

/* {{{ Copy and resize part of an image */
PHP_FUNCTION(imagecopyresized)
{
	zval *SIM, *DIM;
	zend_long SX, SY, SW, SH, DX, DY, DW, DH;
	gdImagePtr im_dst, im_src;
	int srcH, srcW, dstH, dstW, srcY, srcX, dstY, dstX;

	ZEND_PARSE_PARAMETERS_START(10, 10)
		Z_PARAM_OBJECT_OF_CLASS(DIM, gd_image_ce)
		Z_PARAM_OBJECT_OF_CLASS(SIM, gd_image_ce)
		Z_PARAM_LONG(DX)
		Z_PARAM_LONG(DY)
		Z_PARAM_LONG(SX)
		Z_PARAM_LONG(SY)
		Z_PARAM_LONG(DW)
		Z_PARAM_LONG(DH)
		Z_PARAM_LONG(SW)
		Z_PARAM_LONG(SH)
	ZEND_PARSE_PARAMETERS_END();

	im_src = php_gd_libgdimageptr_from_zval_p(SIM);
	im_dst = php_gd_libgdimageptr_from_zval_p(DIM);

	srcX = SX;
	srcY = SY;
	srcH = SH;
	srcW = SW;
	dstX = DX;
	dstY = DY;
	dstH = DH;
	dstW = DW;

	if (dstW <= 0) {
		zend_argument_value_error(7, "must be greater than 0");
		RETURN_THROWS();
	}

	if (dstH <= 0) {
		zend_argument_value_error(8, "must be greater than 0");
		RETURN_THROWS();
	}

	if (srcW <= 0) {
		zend_argument_value_error(9, "must be greater than 0");
		RETURN_THROWS();
	}

	if (srcH <= 0) {
		zend_argument_value_error(10, "must be greater than 0");
		RETURN_THROWS();
	}

	gdImageCopyResized(im_dst, im_src, dstX, dstY, srcX, srcY, dstW, dstH, srcW, srcH);
	RETURN_TRUE;
}
/* }}} */

/* {{{ Get image width */
PHP_FUNCTION(imagesx)
{
	zval *IM;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(1, 1)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	RETURN_LONG(gdImageSX(im));
}
/* }}} */

/* {{{ Get image height */
PHP_FUNCTION(imagesy)
{
	zval *IM;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(1, 1)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	RETURN_LONG(gdImageSY(im));
}
/* }}} */

/* {{{ Set the clipping rectangle. */
PHP_FUNCTION(imagesetclip)
{
	zval *im_zval;
	gdImagePtr im;
	zend_long x1, y1, x2, y2;

	ZEND_PARSE_PARAMETERS_START(5, 5)
		Z_PARAM_OBJECT_OF_CLASS(im_zval, gd_image_ce)
		Z_PARAM_LONG(x1)
		Z_PARAM_LONG(y1)
		Z_PARAM_LONG(x2)
		Z_PARAM_LONG(y2)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(im_zval);

	gdImageSetClip(im, x1, y1, x2, y2);
	RETURN_TRUE;
}
/* }}} */

/* {{{ Get the clipping rectangle. */
PHP_FUNCTION(imagegetclip)
{
	zval *im_zval;
	gdImagePtr im;
	int x1, y1, x2, y2;

	ZEND_PARSE_PARAMETERS_START(1, 1)
		Z_PARAM_OBJECT_OF_CLASS(im_zval, gd_image_ce)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(im_zval);

	gdImageGetClip(im, &x1, &y1, &x2, &y2);

	array_init_size(return_value, 4);
	zend_hash_real_init_packed(Z_ARRVAL_P(return_value));
	add_index_long(return_value, 0, x1);
	add_index_long(return_value, 1, y1);
	add_index_long(return_value, 2, x2);
	add_index_long(return_value, 3, y2);
}
/* }}} */

#ifdef HAVE_GD_FREETYPE

#define TTFTEXT_DRAW 0
#define TTFTEXT_BBOX 1

/* {{{ Give the bounding box of a text using fonts via freetype2 */
PHP_FUNCTION(imageftbbox)
{
	php_imagettftext_common(INTERNAL_FUNCTION_PARAM_PASSTHRU, TTFTEXT_BBOX);
}
/* }}} */

/* {{{ Write text to the image using fonts via freetype2 */
PHP_FUNCTION(imagefttext)
{
	php_imagettftext_common(INTERNAL_FUNCTION_PARAM_PASSTHRU, TTFTEXT_DRAW);
}
/* }}} */

/* {{{ php_imagettftext_common */
static void php_imagettftext_common(INTERNAL_FUNCTION_PARAMETERS, int mode)
{
	zval *IM, *EXT = NULL;
	gdImagePtr im=NULL;
	zend_long col = -1, x = 0, y = 0;
	size_t str_len, fontname_len;
	int i, brect[8];
	double ptsize, angle;
	char *str = NULL, *fontname = NULL;
	char *error = NULL;
	gdFTStringExtra strex = {0};

	if (mode == TTFTEXT_BBOX) {
		if (zend_parse_parameters(ZEND_NUM_ARGS(), "ddss|a", &ptsize, &angle, &fontname, &fontname_len, &str, &str_len, &EXT) == FAILURE) {
			RETURN_THROWS();
		}
	} else {
		if (zend_parse_parameters(ZEND_NUM_ARGS(), "Oddlllss|a", &IM, gd_image_ce, &ptsize, &angle, &x, &y, &col, &fontname, &fontname_len, &str, &str_len, &EXT) == FAILURE) {
			RETURN_THROWS();
		}
		im = php_gd_libgdimageptr_from_zval_p(IM);
	}

	// FT_F26Dot6 is a signed long alias
	if (ptsize < (double)LONG_MIN / 64 || ptsize > (double)LONG_MAX / 64) {
		zend_argument_value_error(2, "must be between " ZEND_LONG_FMT " and " ZEND_LONG_FMT, (zend_long)((double)LONG_MIN / 64), (zend_long)((double)LONG_MAX / 64));
		RETURN_THROWS();
	}

	if (UNEXPECTED(!zend_finite(ptsize))) {
		zend_argument_value_error(2, "must be finite");
		RETURN_THROWS();
	}

	/* convert angle to radians */
	angle = angle * (M_PI/180);

	if (EXT) {	/* parse extended info */
		zval *item;
		zend_string *key;

		/* walk the assoc array */
		if (!HT_IS_PACKED(Z_ARRVAL_P(EXT))) {
			ZEND_HASH_MAP_FOREACH_STR_KEY_VAL(Z_ARRVAL_P(EXT), key, item) {
				if (key == NULL) {
					continue;
				}
				if (zend_string_equals_literal(key, "linespacing")) {
					strex.flags |= gdFTEX_LINESPACE;
					strex.linespacing = zval_get_double(item);
				}
			} ZEND_HASH_FOREACH_END();
		}
	}

	// libgd note: Those should return const char * ideally, but backward compatibility ..
	if (EXT) {
		error = gdImageStringFTEx(im, brect, col, fontname, ptsize, angle, x, y, str, &strex);
	} else {
		error = gdImageStringFT(im, brect, col, fontname, ptsize, angle, x, y, str);
	}

	if (error) {
		php_error_docref(NULL, E_WARNING, "%s", error);
		RETURN_FALSE;
	}

	array_init_size(return_value, 8);
	zend_hash_real_init_packed(Z_ARRVAL_P(return_value));

	/* return array with the text's bounding box */
	for (i = 0; i < 8; i++) {
		add_index_long(return_value, i, brect[i]);
	}
}
/* }}} */
#endif /* HAVE_GD_FREETYPE */

/* Section Filters */
#define PHP_GD_SINGLE_RES	\
	zval *SIM;	\
	gdImagePtr im_src;	\
	if (zend_parse_parameters(1, "O", &SIM, gd_image_ce) == FAILURE) {	\
		RETURN_THROWS();	\
	}	\
	im_src = php_gd_libgdimageptr_from_zval_p(SIM);

static void php_image_filter_negate(INTERNAL_FUNCTION_PARAMETERS)
{
	PHP_GD_SINGLE_RES

	RETURN_BOOL(gdImageNegate(im_src) == 1);
}

static void php_image_filter_grayscale(INTERNAL_FUNCTION_PARAMETERS)
{
	PHP_GD_SINGLE_RES

	RETURN_BOOL(gdImageGrayScale(im_src) == 1);
}

static void php_image_filter_brightness(INTERNAL_FUNCTION_PARAMETERS)
{
	zval *SIM;
	gdImagePtr im_src;
	zend_long brightness, tmp;

	ZEND_PARSE_PARAMETERS_START(3, 3)
		Z_PARAM_OBJECT_OF_CLASS(SIM, gd_image_ce)
		Z_PARAM_LONG(tmp)
		Z_PARAM_LONG(brightness)
	ZEND_PARSE_PARAMETERS_END();

	im_src = php_gd_libgdimageptr_from_zval_p(SIM);

	RETURN_BOOL(gdImageBrightness(im_src, (int)brightness) == 1);
}

static void php_image_filter_contrast(INTERNAL_FUNCTION_PARAMETERS)
{
	zval *SIM;
	gdImagePtr im_src;
	zend_long contrast, tmp;

	ZEND_PARSE_PARAMETERS_START(3, 3)
		Z_PARAM_OBJECT_OF_CLASS(SIM, gd_image_ce)
		Z_PARAM_LONG(tmp)
		Z_PARAM_LONG(contrast)
	ZEND_PARSE_PARAMETERS_END();

	im_src = php_gd_libgdimageptr_from_zval_p(SIM);

	RETURN_BOOL(gdImageContrast(im_src, (int)contrast) == 1);
}

static void php_image_filter_colorize(INTERNAL_FUNCTION_PARAMETERS)
{
	zval *SIM;
	gdImagePtr im_src;
	zend_long r,g,b,tmp;
	zend_long a = 0;

	ZEND_PARSE_PARAMETERS_START(5, 6)
		Z_PARAM_OBJECT_OF_CLASS(SIM, gd_image_ce)
		Z_PARAM_LONG(tmp)
		Z_PARAM_LONG(r)
		Z_PARAM_LONG(g)
		Z_PARAM_LONG(b)
		Z_PARAM_OPTIONAL
		Z_PARAM_LONG(a)
	ZEND_PARSE_PARAMETERS_END();

	im_src = php_gd_libgdimageptr_from_zval_p(SIM);

	RETURN_BOOL(gdImageColor(im_src, (int) r, (int) g, (int) b, (int) a) == 1);
}

static void php_image_filter_edgedetect(INTERNAL_FUNCTION_PARAMETERS)
{
	PHP_GD_SINGLE_RES

	RETURN_BOOL(gdImageEdgeDetectQuick(im_src) == 1);
}

static void php_image_filter_emboss(INTERNAL_FUNCTION_PARAMETERS)
{
	PHP_GD_SINGLE_RES

	RETURN_BOOL(gdImageEmboss(im_src) == 1);
}

static void php_image_filter_gaussian_blur(INTERNAL_FUNCTION_PARAMETERS)
{
	PHP_GD_SINGLE_RES

	RETURN_BOOL(gdImageGaussianBlur(im_src) == 1);
}

static void php_image_filter_selective_blur(INTERNAL_FUNCTION_PARAMETERS)
{
	PHP_GD_SINGLE_RES

	RETURN_BOOL(gdImageSelectiveBlur(im_src) == 1);
}

static void php_image_filter_mean_removal(INTERNAL_FUNCTION_PARAMETERS)
{
	PHP_GD_SINGLE_RES

	RETURN_BOOL(gdImageMeanRemoval(im_src) == 1);
}

static void php_image_filter_smooth(INTERNAL_FUNCTION_PARAMETERS)
{
	zval *SIM;
	zend_long tmp;
	gdImagePtr im_src;
	double weight;

	ZEND_PARSE_PARAMETERS_START(3, 3)
		Z_PARAM_OBJECT_OF_CLASS(SIM, gd_image_ce)
		Z_PARAM_LONG(tmp)
		Z_PARAM_DOUBLE(weight)
	ZEND_PARSE_PARAMETERS_END();

	im_src = php_gd_libgdimageptr_from_zval_p(SIM);

	RETURN_BOOL(gdImageSmooth(im_src, (float)weight) == 1);
}

static void php_image_filter_pixelate(INTERNAL_FUNCTION_PARAMETERS)
{
	zval *IM;
	gdImagePtr im;
	zend_long tmp, blocksize;
	bool mode = false;

	ZEND_PARSE_PARAMETERS_START(3, 4)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(tmp)
		Z_PARAM_LONG(blocksize)
		Z_PARAM_OPTIONAL
		Z_PARAM_BOOL(mode)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	RETURN_BOOL(gdImagePixelate(im, (int) blocksize, (const unsigned int) mode));;
}

static void php_image_filter_scatter(INTERNAL_FUNCTION_PARAMETERS)
{
	zval *IM;
	zval *hash_colors = NULL;
	gdImagePtr im;
	zend_long tmp;
	zend_long scatter_sub, scatter_plus;

	ZEND_PARSE_PARAMETERS_START(4, 5)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(tmp)
		Z_PARAM_LONG(scatter_sub)
		Z_PARAM_LONG(scatter_plus)
		Z_PARAM_OPTIONAL
		Z_PARAM_ARRAY(hash_colors)
	ZEND_PARSE_PARAMETERS_END();

	if (scatter_sub < 0 || ZEND_SIZE_T_INT_OVFL(scatter_sub)) {
		zend_argument_value_error(3, "must be between 0 and %d", INT_MAX);
		RETURN_THROWS();
	}

	if (scatter_plus < 0 || ZEND_SIZE_T_INT_OVFL(scatter_plus)) {
		zend_argument_value_error(4, "must be between 0 and %d", INT_MAX);
		RETURN_THROWS();
	}

	im = php_gd_libgdimageptr_from_zval_p(IM);

	if (hash_colors) {
		uint32_t i = 0;
		uint32_t num_colors = zend_hash_num_elements(Z_ARRVAL_P(hash_colors));
		zval *color;
		int *colors;

		if (num_colors == 0) {
			RETURN_BOOL(gdImageScatter(im, (int)scatter_sub, (int)scatter_plus));
		}

		colors = safe_emalloc(num_colors, sizeof(int), 0);

		ZEND_HASH_FOREACH_VAL(Z_ARRVAL_P(hash_colors), color) {
			*(colors + i++) = (int) zval_get_long(color);
		} ZEND_HASH_FOREACH_END();

		RETVAL_BOOL(gdImageScatterColor(im, (int)scatter_sub, (int)scatter_plus, colors, num_colors));

		efree(colors);
	} else {
		RETURN_BOOL(gdImageScatter(im, (int) scatter_sub, (int) scatter_plus));
	}
}

/* {{{ Applies Filter an image using a custom angle */
PHP_FUNCTION(imagefilter)
{
	zval *tmp;

	typedef void (*image_filter)(INTERNAL_FUNCTION_PARAMETERS);
	zend_long filtertype;
	image_filter filters[] =
	{
		php_image_filter_negate ,
		php_image_filter_grayscale,
		php_image_filter_brightness,
		php_image_filter_contrast,
		php_image_filter_colorize,
		php_image_filter_edgedetect,
		php_image_filter_emboss,
		php_image_filter_gaussian_blur,
		php_image_filter_selective_blur,
		php_image_filter_mean_removal,
		php_image_filter_smooth,
		php_image_filter_pixelate,
		php_image_filter_scatter
	};

	if (ZEND_NUM_ARGS() < 2 || ZEND_NUM_ARGS() > IMAGE_FILTER_MAX_ARGS) {
		WRONG_PARAM_COUNT;
	} else if (zend_parse_parameters(2, "Ol", &tmp, gd_image_ce, &filtertype) == FAILURE) {
		RETURN_THROWS();
	}

	if (UNEXPECTED(filtertype < 0 || filtertype > IMAGE_FILTER_MAX)) {
		zend_argument_value_error(2, "must be one of the IMG_FILTER_* filter constants");
		RETURN_THROWS();
	}
	filters[filtertype](INTERNAL_FUNCTION_PARAM_PASSTHRU);
}
/* }}} */

/* {{{ Apply a 3x3 convolution matrix, using coefficient div and offset */
PHP_FUNCTION(imageconvolution)
{
	zval *SIM, *hash_matrix;
	zval *var = NULL, *var2 = NULL;
	gdImagePtr im_src = NULL;
	double div, offset;
	float matrix[3][3] = {{0,0,0}, {0,0,0}, {0,0,0}};

	ZEND_PARSE_PARAMETERS_START(4, 4)
		Z_PARAM_OBJECT_OF_CLASS(SIM, gd_image_ce)
		Z_PARAM_ARRAY(hash_matrix)
		Z_PARAM_DOUBLE(div)
		Z_PARAM_DOUBLE(offset)
	ZEND_PARSE_PARAMETERS_END();

	im_src = php_gd_libgdimageptr_from_zval_p(SIM);

	if (zend_hash_num_elements(Z_ARRVAL_P(hash_matrix)) != 3) {
		zend_argument_value_error(2, "must be a 3x3 array");
		RETURN_THROWS();
	}

	for (uint8_t i = 0; i < 3; i++) {
		if ((var = zend_hash_index_find_deref(Z_ARRVAL_P(hash_matrix), (i))) != NULL && Z_TYPE_P(var) == IS_ARRAY) {
			if (zend_hash_num_elements(Z_ARRVAL_P(var)) != 3 ) {
				zend_argument_value_error(2, "must be a 3x3 array, matrix[%d] only has %d elements", i, zend_hash_num_elements(Z_ARRVAL_P(var)));
				RETURN_THROWS();
			}

			for (uint8_t j = 0; j < 3; j++) {
				if ((var2 = zend_hash_index_find(Z_ARRVAL_P(var), j)) != NULL) {
					matrix[i][j] = (float) zval_get_double(var2);
				} else {
					zend_argument_value_error(2, "must be a 3x3 array, matrix[%d][%d] cannot be found (missing integer key)", i, j);
					RETURN_THROWS();
				}
			}
		}
	}

	if (UNEXPECTED(!zend_finite(div))) {
		zend_argument_value_error(3, "must be finite");
		RETURN_THROWS();
	}

	float div_float = (float) div;
	if (UNEXPECTED(div_float == 0.0f)) {
		zend_argument_value_error(3, "must not be 0");
		RETURN_THROWS();
	}

	if (UNEXPECTED(!zend_finite(offset))) {
		zend_argument_value_error(4, "must be finite");
		RETURN_THROWS();
	}

	RETURN_BOOL(gdImageConvolution(im_src, matrix, div_float, (float) offset));
}
/* }}} */
/* End section: Filters */

/* {{{ Flip an image (in place) horizontally, vertically or both directions. */
PHP_FUNCTION(imageflip)
{
	zval *IM;
	zend_long mode;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(2, 2)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(mode)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	switch (mode) {
		case PHP_GD_FLIP_VERTICAL:
			gdImageFlipVertical(im);
			break;

		case PHP_GD_FLIP_HORIZONTAL:
			gdImageFlipHorizontal(im);
			break;

		case PHP_GD_FLIP_BOTH:
			gdImageFlipBoth(im);
			break;

		default:
			zend_argument_value_error(2, "must be one of IMG_FLIP_VERTICAL, IMG_FLIP_HORIZONTAL, or IMG_FLIP_BOTH");
			RETURN_THROWS();
	}

	RETURN_TRUE;
}
/* }}} */

/* {{{ Should antialiased functions used or not*/
PHP_FUNCTION(imageantialias)
{
	zval *IM;
	bool alias;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(2, 2)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_BOOL(alias)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);
	if (im->trueColor) {
		im->AA = alias;
	}

	RETURN_TRUE;
}
/* }}} */

/* {{{ Crop an image using the given coordinates and size, x, y, width and height. */
PHP_FUNCTION(imagecrop)
{
	zval *IM;
	gdImagePtr im;
	gdImagePtr im_crop;
	gdRect rect;
	zval *z_rect;
	zval *tmp;

	ZEND_PARSE_PARAMETERS_START(2, 2)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_ARRAY(z_rect)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	if ((tmp = zend_hash_str_find(Z_ARRVAL_P(z_rect), "x", sizeof("x") -1)) != NULL) {
		rect.x = zval_get_long(tmp);
	} else {
		zend_argument_value_error(2, "must have an \"x\" key");
		RETURN_THROWS();
	}

	if ((tmp = zend_hash_str_find(Z_ARRVAL_P(z_rect), "y", sizeof("y") - 1)) != NULL) {
		rect.y = zval_get_long(tmp);
	} else {
		zend_argument_value_error(2, "must have a \"y\" key");
		RETURN_THROWS();
	}

	if ((tmp = zend_hash_str_find(Z_ARRVAL_P(z_rect), "width", sizeof("width") - 1)) != NULL) {
		rect.width = zval_get_long(tmp);
	} else {
		zend_argument_value_error(2, "must have a \"width\" key");
		RETURN_THROWS();
	}

	if ((tmp = zend_hash_str_find(Z_ARRVAL_P(z_rect), "height", sizeof("height") - 1)) != NULL) {
		rect.height = zval_get_long(tmp);
	} else {
		zend_argument_value_error(2, "must have a \"height\" key");
		RETURN_THROWS();
	}

	if ((rect.width > 0 && rect.x > INT_MAX - rect.width)) {
		zend_argument_value_error(2, "overflow with \"x\" and \"width\" keys");
		RETURN_THROWS();
	}

	if ((rect.width < 0 && rect.x < INT_MIN - rect.width)) {
		zend_argument_value_error(2, "underflow with \"x\" and \"width\" keys");
		RETURN_THROWS();
	}

	if ((rect.height > 0 && rect.y > INT_MAX - rect.height)) {
		zend_argument_value_error(2, "overflow with \"y\" and \"height\" keys");
		RETURN_THROWS();
	}

	if ((rect.height < 0 && rect.y < INT_MIN - rect.height)) {
		zend_argument_value_error(2, "underflow with \"y\" and \"height\" keys");
		RETURN_THROWS();
	}

	im_crop = gdImageCrop(im, &rect);

	if (im_crop == NULL) {
		RETURN_FALSE;
	}

	php_gd_assign_libgdimageptr_as_extgdimage(return_value, im_crop);
}
/* }}} */

/* {{{ Crop an image automatically using one of the available modes. */
PHP_FUNCTION(imagecropauto)
{
	zval *IM;
	zend_long mode = GD_CROP_DEFAULT;
	zend_long color = -1;
	double threshold = 0.5f;
	gdImagePtr im;
	gdImagePtr im_crop;

	ZEND_PARSE_PARAMETERS_START(1, 4)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_OPTIONAL
		Z_PARAM_LONG(mode)
		Z_PARAM_DOUBLE(threshold)
		Z_PARAM_LONG(color)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	switch (mode) {
		case GD_CROP_DEFAULT:
		case GD_CROP_TRANSPARENT:
		case GD_CROP_BLACK:
		case GD_CROP_WHITE:
		case GD_CROP_SIDES:
			im_crop = gdImageCropAuto(im, mode);
			break;

		case GD_CROP_THRESHOLD:
			if (color < 0 || (!gdImageTrueColor(im) && color >= gdImageColorsTotal(im))) {
				zend_argument_value_error(4, "must be greater than or equal to 0 when using the threshold mode");
				RETURN_THROWS();
			}
			im_crop = gdImageCropThreshold(im, color, (float) threshold);
			break;

		default:
			zend_argument_value_error(2, "must be a valid mode");
			RETURN_THROWS();
	}

	if (im_crop == NULL) {
		RETURN_FALSE;
	}

	php_gd_assign_libgdimageptr_as_extgdimage(return_value, im_crop);
}
/* }}} */

/* {{{ Scale an image using the given new width and height. */
PHP_FUNCTION(imagescale)
{
	zval *IM;
	gdImagePtr im;
	gdImagePtr im_scaled = NULL;
	int new_width, new_height;
	zend_long tmp_w, tmp_h=-1, tmp_m = GD_BILINEAR_FIXED;
	gdInterpolationMethod method, old_method;

	ZEND_PARSE_PARAMETERS_START(2, 4)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_LONG(tmp_w)
		Z_PARAM_OPTIONAL
		Z_PARAM_LONG(tmp_h)
		Z_PARAM_LONG(tmp_m)
	ZEND_PARSE_PARAMETERS_END();

	if (tmp_m < GD_DEFAULT || tmp_m >= GD_METHOD_COUNT) {
		zend_argument_value_error(4, "must be one of the GD_* constants");
		RETURN_THROWS();
	}

	method = tmp_m;

	im = php_gd_libgdimageptr_from_zval_p(IM);

	if (tmp_h < 0 && tmp_w < 0) {
		zend_value_error("Argument #2 ($width) and argument #3 ($height) cannot be both negative");
		RETURN_THROWS();
	}

	if (tmp_h < 0 || tmp_w < 0) {
		/* preserve ratio */
		long src_x, src_y;

		src_x = gdImageSX(im);
		src_y = gdImageSY(im);

		if (src_x && tmp_h < 0) {
			if (tmp_w > (ZEND_LONG_MAX / src_y)) {
				zend_argument_value_error(2, "must be less than or equal to " ZEND_LONG_FMT, (zend_long)(ZEND_LONG_MAX / src_y));
				RETURN_THROWS();
			}
			tmp_h = tmp_w * src_y / src_x;
		}
		if (src_y && tmp_w < 0) {
			if (tmp_h > (ZEND_LONG_MAX / src_x)) {
				zend_argument_value_error(3, "must be less than or equal to " ZEND_LONG_FMT, (zend_long)(ZEND_LONG_MAX / src_x));
				RETURN_THROWS();
			}
			tmp_w = tmp_h * src_x / src_y;
		}
	}

	if (tmp_w <= 0 || ZEND_SIZE_T_INT_OVFL(tmp_w)) {
		zend_argument_value_error(2, "must be between 1 and %d", INT_MAX);
		RETURN_THROWS();
	}

	if (tmp_h <= 0 || ZEND_SIZE_T_INT_OVFL(tmp_h)) {
		zend_argument_value_error(3, "must be between 1 and %d", INT_MAX);
		RETURN_THROWS();
	}


	new_width = tmp_w;
	new_height = tmp_h;

	/* gdImageGetInterpolationMethod() is only available as of GD 2.1.1 */
	old_method = im->interpolation_id;
	if (gdImageSetInterpolationMethod(im, method)) {
		im_scaled = gdImageScale(im, new_width, new_height);
	}
	gdImageSetInterpolationMethod(im, old_method);

	if (im_scaled == NULL) {
		RETURN_FALSE;
	}

	php_gd_assign_libgdimageptr_as_extgdimage(return_value, im_scaled);
}
/* }}} */

/* {{{ Return an image containing the affine tramsformed src image, using an optional clipping area */
PHP_FUNCTION(imageaffine)
{
	zval *IM;
	gdImagePtr src;
	gdImagePtr dst;
	gdRect rect;
	gdRectPtr pRect = NULL;
	zval *z_rect = NULL;
	zval *z_affine;
	double affine[6];

	ZEND_PARSE_PARAMETERS_START(2, 3)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_ARRAY(z_affine)
		Z_PARAM_OPTIONAL
		Z_PARAM_ARRAY_OR_NULL(z_rect)
	ZEND_PARSE_PARAMETERS_END();


	src = php_gd_libgdimageptr_from_zval_p(IM);
	uint32_t nelems = zend_hash_num_elements(Z_ARRVAL_P(z_affine));
	if (nelems != 6) {
		zend_argument_value_error(2, "must have 6 elements");
		RETURN_THROWS();
	}

	for (uint32_t i = 0; i < nelems; i++) {
		zval *zval_affine_elem = zend_hash_index_find_deref(Z_ARRVAL_P(z_affine), i);
		if (zval_affine_elem != NULL) {
			switch (Z_TYPE_P(zval_affine_elem)) {
				case IS_LONG:
				case IS_DOUBLE:
				case IS_STRING:
					affine[i] = zval_get_double(zval_affine_elem);
					if (affine[i] < INT_MIN || affine[i] > INT_MAX) {
						zend_argument_value_error(2, "element %i must be between %d and %d", i, INT_MIN, INT_MAX);
						RETURN_THROWS();
					}
					break;
				default:
					zend_argument_type_error(3, "contains invalid type for element %i", i);
					RETURN_THROWS();
			}
		}
	}

	if (z_rect != NULL) {
		zval *tmp;
		if ((tmp = zend_hash_str_find(Z_ARRVAL_P(z_rect), "x", sizeof("x") - 1)) != NULL) {
			rect.x = zval_get_long(tmp);
		} else {
			zend_argument_value_error(3, "must have an \"x\" key");
			RETURN_THROWS();
		}

		if ((tmp = zend_hash_str_find(Z_ARRVAL_P(z_rect), "y", sizeof("y") - 1)) != NULL) {
			rect.y = zval_get_long(tmp);
		} else {
			zend_argument_value_error(3, "must have a \"y\" key");
			RETURN_THROWS();
		}

		if ((tmp = zend_hash_str_find(Z_ARRVAL_P(z_rect), "width", sizeof("width") - 1)) != NULL) {
			rect.width = zval_get_long(tmp);
		} else {
			zend_argument_value_error(3, "must have a \"width\" key");
			RETURN_THROWS();
		}

		if ((tmp = zend_hash_str_find(Z_ARRVAL_P(z_rect), "height", sizeof("height") - 1)) != NULL) {
			rect.height = zval_get_long(tmp);
		} else {
			zend_argument_value_error(3, "must have a \"height\" key");
			RETURN_THROWS();
		}
		pRect = &rect;
	}

	if (gdTransformAffineGetImage(&dst, src, pRect, affine) != GD_TRUE) {
		RETURN_FALSE;
	}

	if (dst == NULL) {
		RETURN_FALSE;
	}

	php_gd_assign_libgdimageptr_as_extgdimage(return_value, dst);
}
/* }}} */

/* {{{ Return an image containing the affine tramsformed src image, using an optional clipping area */
PHP_FUNCTION(imageaffinematrixget)
{
	double affine[6];
	zend_long type;
	zval *options = NULL;
	zval *tmp;
	int res = GD_FALSE;

	ZEND_PARSE_PARAMETERS_START(2, 2)
		Z_PARAM_LONG(type)
		Z_PARAM_ZVAL(options)
	ZEND_PARSE_PARAMETERS_END();

	switch((gdAffineStandardMatrix)type) {
		case GD_AFFINE_TRANSLATE:
		case GD_AFFINE_SCALE: {
			double x, y;
			if (Z_TYPE_P(options) != IS_ARRAY) {
				zend_argument_type_error(1, "must be of type array when using translate or scale");
				RETURN_THROWS();
			}

			if ((tmp = zend_hash_str_find(Z_ARRVAL_P(options), "x", sizeof("x") - 1)) != NULL) {
				x = zval_get_double(tmp);
			} else {
				zend_argument_value_error(2, "must have an \"x\" key");
				RETURN_THROWS();
			}

			if ((tmp = zend_hash_str_find(Z_ARRVAL_P(options), "y", sizeof("y") - 1)) != NULL) {
				y = zval_get_double(tmp);
			} else {
				zend_argument_value_error(2, "must have a \"y\" key");
				RETURN_THROWS();
			}

			if (type == GD_AFFINE_TRANSLATE) {
				res = gdAffineTranslate(affine, x, y);
			} else {
				res = gdAffineScale(affine, x, y);
			}
			break;
		}

		case GD_AFFINE_ROTATE:
		case GD_AFFINE_SHEAR_HORIZONTAL:
		case GD_AFFINE_SHEAR_VERTICAL: {
			double angle;

			angle = zval_get_double(options);

			if (type == GD_AFFINE_SHEAR_HORIZONTAL) {
				res = gdAffineShearHorizontal(affine, angle);
			} else if (type == GD_AFFINE_SHEAR_VERTICAL) {
				res = gdAffineShearVertical(affine, angle);
			} else {
				res = gdAffineRotate(affine, angle);
			}
			break;
		}

		default:
			zend_argument_value_error(1, "must be a valid element type");
			RETURN_THROWS();
	}

	if (res == GD_FALSE) {
		RETURN_FALSE;
	} else {
		array_init_size(return_value, 6);
		zend_hash_real_init_packed(Z_ARRVAL_P(return_value));
		for (uint8_t i = 0; i < 6; i++) {
			add_index_double(return_value, i, affine[i]);
		}
	}
} /* }}} */

/* {{{ Concat two matrices (as in doing many ops in one go) */
PHP_FUNCTION(imageaffinematrixconcat)
{
	double m1[6];
	double m2[6];
	double mr[6];

	zval *tmp;
	zval *z_m1;
	zval *z_m2;
	int i;

	ZEND_PARSE_PARAMETERS_START(2, 2)
		Z_PARAM_ARRAY(z_m1)
		Z_PARAM_ARRAY(z_m2)
	ZEND_PARSE_PARAMETERS_END();

	if (zend_hash_num_elements(Z_ARRVAL_P(z_m1)) != 6) {
		zend_argument_value_error(1, "must have 6 elements");
		RETURN_THROWS();
	}

	if (zend_hash_num_elements(Z_ARRVAL_P(z_m2)) != 6) {
		zend_argument_value_error(1, "must have 6 elements");
		RETURN_THROWS();
	}

	for (i = 0; i < 6; i++) {
		if ((tmp = zend_hash_index_find_deref(Z_ARRVAL_P(z_m1), i)) != NULL) {
			switch (Z_TYPE_P(tmp)) {
				case IS_LONG:
				case IS_DOUBLE:
				case IS_STRING:
					m1[i] = zval_get_double(tmp);
					break;
				default:
					zend_argument_type_error(1, "contains invalid type for element %i", i);
					RETURN_THROWS();
			}
		}

		if ((tmp = zend_hash_index_find_deref(Z_ARRVAL_P(z_m2), i)) != NULL) {
			switch (Z_TYPE_P(tmp)) {
				case IS_LONG:
				case IS_DOUBLE:
				case IS_STRING:
					m2[i] = zval_get_double(tmp);
					break;
				default:
					zend_argument_type_error(2, "contains invalid type for element %i", i);
					RETURN_THROWS();
			}
		}
	}

	if (gdAffineConcat (mr, m1, m2) != GD_TRUE) {
		RETURN_FALSE;
	}

	array_init_size(return_value, 6);
	zend_hash_real_init_packed(Z_ARRVAL_P(return_value));
	for (i = 0; i < 6; i++) {
		add_index_double(return_value, i, mr[i]);
	}
} /* }}} */

/* {{{ Get the default interpolation method. */
PHP_FUNCTION(imagegetinterpolation)
{
	zval *IM;
	gdImagePtr im;

	ZEND_PARSE_PARAMETERS_START(1, 1)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

#ifdef HAVE_GD_GET_INTERPOLATION
	RETURN_LONG(gdImageGetInterpolationMethod(im));
#else
	RETURN_LONG(im->interpolation_id);
#endif
}
/* }}} */

/* {{{ Set the default interpolation method, passing -1 or 0 sets it to the libgd default (bilinear). */
PHP_FUNCTION(imagesetinterpolation)
{
	zval *IM;
	gdImagePtr im;
	zend_long method = GD_BILINEAR_FIXED;

	ZEND_PARSE_PARAMETERS_START(1, 2)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_OPTIONAL
		Z_PARAM_LONG(method)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	if (method == -1) {
		 method = GD_BILINEAR_FIXED;
	}
	RETURN_BOOL(gdImageSetInterpolationMethod(im, (gdInterpolationMethod) method));
}
/* }}} */

/* {{{ Get or set the resolution of the image in DPI. */
PHP_FUNCTION(imageresolution)
{
	zval *IM;
	gdImagePtr im;
	zend_long res_x, res_y;
	bool res_x_is_null = true, res_y_is_null = true;

	ZEND_PARSE_PARAMETERS_START(1, 3)
		Z_PARAM_OBJECT_OF_CLASS(IM, gd_image_ce)
		Z_PARAM_OPTIONAL
		Z_PARAM_LONG_OR_NULL(res_x, res_x_is_null)
		Z_PARAM_LONG_OR_NULL(res_y, res_y_is_null)
	ZEND_PARSE_PARAMETERS_END();

	im = php_gd_libgdimageptr_from_zval_p(IM);

	if (!res_x_is_null && !res_y_is_null) {
		if (res_x < 0 || ZEND_SIZE_T_UINT_OVFL(res_x)) {
			zend_argument_value_error(2, "must be between 0 and %u", UINT_MAX);
			RETURN_THROWS();
		}
		if (res_y < 0 || ZEND_SIZE_T_UINT_OVFL(res_y)) {
			zend_argument_value_error(3, "must be between 0 and %u", UINT_MAX);
			RETURN_THROWS();
		}
		gdImageSetResolution(im, res_x, res_y);
		RETURN_TRUE;
	} else if (!res_x_is_null && res_y_is_null) {
		if (res_x < 0 || ZEND_SIZE_T_UINT_OVFL(res_x)) {
			zend_argument_value_error(2, "must be between 0 and %u", UINT_MAX);
			RETURN_THROWS();
		}
		gdImageSetResolution(im, res_x, res_x);
		RETURN_TRUE;
	} else if (res_x_is_null && !res_y_is_null) {
		if (res_y < 0 || ZEND_SIZE_T_UINT_OVFL(res_y)) {
			zend_argument_value_error(3, "must be between 0 and %u", UINT_MAX);
			RETURN_THROWS();
		}
		gdImageSetResolution(im, res_y, res_y);
		RETURN_TRUE;
	}

	zval imx, imy;
	ZVAL_LONG(&imx, gdImageResolutionX(im));
	ZVAL_LONG(&imy, gdImageResolutionY(im));
	RETURN_ARR(zend_new_pair(&imx, &imy));
}
/* }}} */


/*********************************************************
 *
 * Stream Handling
 * Formerly contained within ext/gd/gd_ctx.c and included
 * at the the top of this file
 *
 ********************************************************/

#define CTX_PUTC(c,ctx) ctx->putC(ctx, c)

static void _php_image_output_putc(struct gdIOCtx *ctx, int c) /* {{{ */
{
	/* without the following downcast, the write will fail
	 * (i.e., will write a zero byte) for all
	 * big endian architectures:
	 */
	unsigned char ch = (unsigned char) c;
	php_write(&ch, 1);
} /* }}} */

static int _php_image_output_putbuf(struct gdIOCtx *ctx, const void* buf, int l) /* {{{ */
{
	size_t written = php_write((void *)buf, l);
	ZEND_ASSERT(written <= INT_MAX); /* since l <= INT_MAX */
	return (int) written;
} /* }}} */

static void _php_image_output_ctxfree(struct gdIOCtx *ctx) /* {{{ */
{
	efree(ctx);
} /* }}} */

static void _php_image_stream_putc(struct gdIOCtx *ctx, int c) /* {{{ */ {
	char ch = (char) c;
	php_stream * stream = (php_stream *)ctx->data;
	php_stream_write(stream, &ch, 1);
} /* }}} */

static int _php_image_stream_putbuf(struct gdIOCtx *ctx, const void* buf, int l) /* {{{ */
{
	php_stream * stream = (php_stream *)ctx->data;
	return php_stream_write(stream, (void *)buf, l);
} /* }}} */

static void _php_image_stream_ctxfree(struct gdIOCtx *ctx) /* {{{ */
{
	if(ctx->data) {
		ctx->data = NULL;
	}
	efree(ctx);
} /* }}} */

static void _php_image_stream_ctxfreeandclose(struct gdIOCtx *ctx) /* {{{ */
{
	if(ctx->data) {
		php_stream_close((php_stream *) ctx->data);
		ctx->data = NULL;
	}
	efree(ctx);
} /* }}} */

static gdIOCtx *create_stream_context(php_stream *stream, int close_stream) {
	gdIOCtx *ctx = ecalloc(1, sizeof(gdIOCtx));

	ctx->putC = _php_image_stream_putc;
	ctx->putBuf = _php_image_stream_putbuf;
	if (close_stream) {
		ctx->gd_free = _php_image_stream_ctxfreeandclose;
	} else {
		ctx->gd_free = _php_image_stream_ctxfree;
	}
	ctx->data = (void *)stream;

	return ctx;
}

static gdIOCtx *create_output_context(zval *to_zval, uint32_t arg_num) {
	gdIOCtx *ctx;

	if (to_zval != NULL) {
		php_stream *stream;
		int close_stream = 1;

		ZEND_ASSERT(arg_num > 0);

		if (Z_TYPE_P(to_zval) == IS_RESOURCE) {
			php_stream_from_zval_no_verify(stream, to_zval);
			if (stream == NULL) {
				return NULL;
			}
			close_stream = 0;
		} else if (Z_TYPE_P(to_zval) == IS_STRING) {
			if (CHECK_ZVAL_NULL_PATH(to_zval)) {
				zend_argument_type_error(arg_num, "must not contain null bytes");
				return NULL;
			}

			stream = php_stream_open_wrapper(Z_STRVAL_P(to_zval), "wb", REPORT_ERRORS|IGNORE_PATH, NULL);
			if (stream == NULL) {
				return NULL;
			}
		} else {
			zend_argument_type_error(arg_num, "must be a file name or a stream resource, %s given", zend_zval_value_name(to_zval));
			return NULL;
		}

		ctx = create_stream_context(stream, close_stream);
	} else {
		ctx = ecalloc(1, sizeof(gdIOCtx));

		ctx->putC = _php_image_output_putc;
		ctx->putBuf = _php_image_output_putbuf;
		ctx->gd_free = _php_image_output_ctxfree;
	}

	return ctx;
}

/* }}} */
