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gd.c
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/*
+----------------------------------------------------------------------+
| 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 |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Rasmus Lerdorf <[email protected]> |
| Stig Bakken <[email protected]> |
| Jim Winstead <[email protected]> |
+----------------------------------------------------------------------+
*/
/* 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 "ext/standard/head.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_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, char *tn, gdImagePtr (*ioctx_func_p)(gdIOCtxPtr));
static void _php_image_create_from(INTERNAL_FUNCTION_PARAMETERS, int image_type, char *tn, gdImagePtr (*func_p)(FILE *), gdImagePtr (*ioctx_func_p)(gdIOCtxPtr));
static void _php_image_output(INTERNAL_FUNCTION_PARAMETERS, int image_type, char *tn);
static gdIOCtx *create_stream_context_from_zval(zval *to_zval);
static gdIOCtx *create_stream_context(php_stream *stream, int close_stream);
static gdIOCtx *create_output_context(void);
static int _php_image_type(zend_string *data);
/* output streaming (formerly gd_ctx.c) */
static void _php_image_output_ctx(INTERNAL_FUNCTION_PARAMETERS, int image_type, char *tn);
/*********************************************************
*
* 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)
{
size_t block_len = sizeof(php_gd_image_object) + zend_object_properties_size(class_type);
php_gd_image_object *intern = emalloc(block_len);
memset(intern, 0, block_len);
zend_object_std_init(&intern->std, class_type);
object_properties_init(&intern->std, class_type);
intern->std.handlers = &php_gd_image_object_handlers;
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;
/* 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
#ifdef HAVE_GD_BMP
php_info_print_table_row(2, "BMP Support", "enabled");
#endif
#ifdef HAVE_GD_AVIF
php_info_print_table_row(2, "AVIF Support", "enabled");
#endif
#ifdef HAVE_GD_TGA
php_info_print_table_row(2, "TGA Read Support", "enabled");
#endif
php_info_print_table_end();
DISPLAY_INI_ENTRIES();
}
/* }}} */
/* {{{ */
PHP_FUNCTION(gd_info)
{
if (zend_parse_parameters_none() == FAILURE) {
RETURN_THROWS();
}
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
#ifdef HAVE_GD_BMP
add_assoc_bool(return_value, "BMP Support", 1);
#else
add_assoc_bool(return_value, "BMP Support", 0);
#endif
#ifdef HAVE_GD_AVIF
add_assoc_bool(return_value, "AVIF Support", 1);
#else
add_assoc_bool(return_value, "AVIF Support", 0);
#endif
#ifdef HAVE_GD_TGA
add_assoc_bool(return_value, "TGA Read Support", 1);
#else
add_assoc_bool(return_value, "TGA Read Support", 0);
#endif
#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;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "P", &file) == FAILURE) {
RETURN_THROWS();
}
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;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "Oa", &IM, gd_image_ce, &styles) == FAILURE) {
RETURN_THROWS();
}
im = php_gd_libgdimageptr_from_zval_p(IM);
num_styles = zend_hash_num_elements(Z_ARRVAL_P(styles));
if (num_styles == 0) {
zend_argument_value_error(2, "cannot be empty");
RETURN_THROWS();
}
/* copy the style values in the stylearr */
stylearr = safe_emalloc(sizeof(int), num_styles, 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;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "ll", &x_size, &y_size) == FAILURE) {
RETURN_THROWS();
}
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;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "O", &IM, gd_image_ce) == FAILURE) {
RETURN_THROWS();
}
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;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "Obl", &IM, gd_image_ce, &dither, &ncolors) == FAILURE) {
RETURN_THROWS();
}
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;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "O", &IM, gd_image_ce) == FAILURE) {
RETURN_THROWS();
}
im = php_gd_libgdimageptr_from_zval_p(IM);
if (gdImagePaletteToTrueColor(im) == 0) {
RETURN_FALSE;
}
RETURN_TRUE;
}
/* }}} */
/* {{{ 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;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "OO", &IM1, gd_image_ce, &IM2, gd_image_ce) == FAILURE) {
RETURN_THROWS();
}
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;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "Ol", &IM, gd_image_ce, &thick) == FAILURE) {
RETURN_THROWS();
}
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;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "Olllll", &IM, gd_image_ce, &cx, &cy, &w, &h, &color) == FAILURE) {
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;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "Ollllllll", &IM, gd_image_ce, &cx, &cy, &w, &h, &ST, &E, &col, &style) == FAILURE) {
RETURN_THROWS();
}
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;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "Ob", &IM, gd_image_ce, &blend) == FAILURE) {
RETURN_THROWS();
}
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;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "Ob", &IM, gd_image_ce, &save) == FAILURE) {
RETURN_THROWS();
}
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;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "Ol", &IM, gd_image_ce, &effect) == FAILURE) {
RETURN_THROWS();
}
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);
if (zend_parse_parameters(ZEND_NUM_ARGS(), "Ollll", &IM, gd_image_ce, &red, &green, &blue, &alpha) == FAILURE) {
RETURN_THROWS();
}
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;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "Ollll", &IM, gd_image_ce, &red, &green, &blue, &alpha) == FAILURE) {
RETURN_THROWS();
}
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;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "Ollll", &IM, gd_image_ce, &red, &green, &blue, &alpha) == FAILURE) {
RETURN_THROWS();
}
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);