gd.c

php-4.4.7学习linux时下载的源代码

/*
   +----------------------------------------------------------------------+
   | PHP Version 4                                                        |
   +----------------------------------------------------------------------+
   | Copyright (c) 1997-2007 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:           |
   | http://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          |
   | [e-mail] so we can mail you a copy immediately.               |
   +----------------------------------------------------------------------+
   | Authors: Rasmus Lerdorf <[e-mail]>                             |
   |          Stig Bakken <[e-mail]>                                   |
   |          Jim Winstead <[e-mail]>                                 |
   +----------------------------------------------------------------------+
 */

/* $Id: gd.c,v 1.221.2.56.2.5 2007/01/01 09:46:42 sebastian Exp $ */

/* 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 "ext/standard/head.h"
#include <math.h>
#include "SAPI.h"
#include "php_gd.h"
#include "ext/standard/info.h"
#include "php_open_temporary_file.h"

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

#if HAVE_LIBGD

static int le_gd, le_gd_font;
#if HAVE_LIBT1
#include <t1lib.h>
static int le_ps_font, le_ps_enc;
static void php_free_ps_font(zend_rsrc_list_entry *rsrc TSRMLS_DC);
static void php_free_ps_enc(zend_rsrc_list_entry *rsrc TSRMLS_DC);
#endif

#include <gd.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 */
#ifdef HAVE_GD_WBMP
#include "libgd/wbmp.h"
#endif
#ifdef ENABLE_GD_TTF
# include "gdttf.h"
#endif

#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif

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

#if HAVE_LIBGD15
/* it's >= 1.5, i.e. has IOCtx */
#define USE_GD_IOCTX 1
#else
#undef USE_GD_IOCTX
#endif

#ifdef USE_GD_IOCTX
#include "gd_ctx.c"
#else
#define gdImageCreateFromGdCtx      NULL
#define gdImageCreateFromGd2Ctx     NULL
#define gdImageCreateFromGd2partCtx NULL
#define gdImageCreateFromGifCtx     NULL
#define gdImageCreateFromJpegCtx    NULL
#define gdImageCreateFromPngCtx     NULL
#define gdImageCreateFromWBMPCtx    NULL
typedef FILE gdIOCtx;
#define CTX_PUTC(c, fp) fputc(c, fp)
#endif

#ifndef HAVE_GDIMAGECOLORRESOLVE
extern int gdImageColorResolve(gdImagePtr, int, int, int);
#endif

#if HAVE_COLORCLOSESTHWB
int gdImageColorClosestHWB(gdImagePtr im, int r, int g, int b);
#endif

#ifndef HAVE_GD_DYNAMIC_CTX_EX
#define gdNewDynamicCtxEx(len, data, val) gdNewDynamicCtx(len, data)
#endif

static gdImagePtr _php_image_create_from_string (zval **Data, char *tn, gdImagePtr (*ioctx_func_p)() TSRMLS_DC);
static void _php_image_create_from(INTERNAL_FUNCTION_PARAMETERS, int image_type, char *tn, gdImagePtr (*func_p)(), gdImagePtr (*ioctx_func_p)());
static void _php_image_output(INTERNAL_FUNCTION_PARAMETERS, int image_type, char *tn, void (*func_p)());
static int _php_image_type(char data[8]);
static void _php_image_convert(INTERNAL_FUNCTION_PARAMETERS, int image_type);
static void _php_image_bw_convert(gdImagePtr im_org, gdIOCtx *out, int threshold);

/* {{{ gd_functions[]
 */
function_entry gd_functions[] = {
	PHP_FE(gd_info,                                 NULL)
	PHP_FE(imagearc,								NULL)
	PHP_FE(imageellipse,							NULL)
	PHP_FE(imagechar,								NULL)
	PHP_FE(imagecharup,								NULL)
	PHP_FE(imagecolorat,							NULL)
	PHP_FE(imagecolorallocate,						NULL)
#if HAVE_LIBGD15
	PHP_FE(imagepalettecopy,						NULL)
	PHP_FE(imagecreatefromstring,					NULL)
#endif
	PHP_FE(imagecolorclosest,						NULL)
#if HAVE_COLORCLOSESTHWB
	PHP_FE(imagecolorclosesthwb,					NULL)
#endif
	PHP_FE(imagecolordeallocate,					NULL)
	PHP_FE(imagecolorresolve,						NULL)
	PHP_FE(imagecolorexact,							NULL)
	PHP_FE(imagecolorset,							NULL)
	PHP_FE(imagecolortransparent,					NULL)
	PHP_FE(imagecolorstotal,						NULL)
	PHP_FE(imagecolorsforindex,						NULL)
	PHP_FE(imagecopy,								NULL)
#if HAVE_LIBGD15
	PHP_FE(imagecopymerge,							NULL)
	PHP_FE(imagecopymergegray,						NULL)
#endif
	PHP_FE(imagecopyresized,						NULL)
	PHP_FE(imagecreate,								NULL)
#if HAVE_LIBGD20
	PHP_FE(imagecreatetruecolor,					NULL)
	PHP_FE(imageistruecolor,						NULL)
	PHP_FE(imagetruecolortopalette,					NULL)
	PHP_FE(imagesetthickness,						NULL)
	PHP_FE(imagefilledarc,							NULL)
	PHP_FE(imagefilledellipse,						NULL)
	PHP_FE(imagealphablending,						NULL)
	PHP_FE(imagesavealpha,							NULL)
	PHP_FE(imagecolorallocatealpha,					NULL)
	PHP_FE(imagecolorresolvealpha, 					NULL)
	PHP_FE(imagecolorclosestalpha,					NULL)
	PHP_FE(imagecolorexactalpha,					NULL)
	PHP_FE(imagecopyresampled,						NULL)
#endif

#ifdef HAVE_GD_BUNDLED
	PHP_FE(imagerotate,     						NULL)
	PHP_FE(imageantialias,							NULL)
#endif

#if HAVE_GD_IMAGESETTILE
	PHP_FE(imagesettile,							NULL)
#endif

#if HAVE_GD_IMAGESETBRUSH
	PHP_FE(imagesetbrush,							NULL)
#endif

	PHP_FE(imagesetstyle,							NULL)

#ifdef HAVE_GD_PNG
	PHP_FE(imagecreatefrompng,						NULL)
#endif
#ifdef HAVE_GD_GIF_READ
	PHP_FE(imagecreatefromgif,						NULL)
#endif
#ifdef HAVE_GD_JPG
	PHP_FE(imagecreatefromjpeg,						NULL)
#endif
#ifdef HAVE_GD_WBMP
	PHP_FE(imagecreatefromwbmp,						NULL)
#endif
#ifdef HAVE_GD_XBM
	PHP_FE(imagecreatefromxbm,						NULL)
#endif
#if defined(HAVE_GD_XPM) && defined(HAVE_GD_BUNDLED)
	PHP_FE(imagecreatefromxpm,						NULL)
#endif
	PHP_FE(imagecreatefromgd,						NULL)
#ifdef HAVE_GD_GD2
	PHP_FE(imagecreatefromgd2,						NULL)
	PHP_FE(imagecreatefromgd2part,					NULL)
#endif
#ifdef HAVE_GD_PNG
	PHP_FE(imagepng,								NULL)
#endif
#ifdef HAVE_GD_GIF_CREATE
	PHP_FE(imagegif,								NULL)
#endif
#ifdef HAVE_GD_JPG
	PHP_FE(imagejpeg,								NULL)
#endif
#ifdef HAVE_GD_WBMP
	PHP_FE(imagewbmp,                               NULL)
#endif
	PHP_FE(imagegd,									NULL)
#ifdef HAVE_GD_GD2
	PHP_FE(imagegd2,								NULL)
#endif

	PHP_FE(imagedestroy,							NULL)
	PHP_FE(imagegammacorrect,						NULL)
	PHP_FE(imagefill,								NULL)
	PHP_FE(imagefilledpolygon,						NULL)
	PHP_FE(imagefilledrectangle,					NULL)
	PHP_FE(imagefilltoborder,						NULL)
	PHP_FE(imagefontwidth,							NULL)
	PHP_FE(imagefontheight,							NULL)
	PHP_FE(imageinterlace,							NULL)
	PHP_FE(imageline,								NULL)
	PHP_FE(imageloadfont,							NULL)
	PHP_FE(imagepolygon,							NULL)
	PHP_FE(imagerectangle,							NULL)
	PHP_FE(imagesetpixel,							NULL)
	PHP_FE(imagestring,								NULL)
	PHP_FE(imagestringup,							NULL)
	PHP_FE(imagesx,									NULL)
	PHP_FE(imagesy,									NULL)
	PHP_FE(imagedashedline,							NULL)

#ifdef ENABLE_GD_TTF
	PHP_FE(imagettfbbox,							NULL)
	PHP_FE(imagettftext,							NULL)
#if HAVE_LIBGD20 && HAVE_LIBFREETYPE && HAVE_GD_STRINGFTEX
	PHP_FE(imageftbbox,								NULL)
	PHP_FE(imagefttext,								NULL)
#endif
#endif

#ifdef HAVE_LIBT1
	PHP_FE(imagepsloadfont,							NULL)
	/*
	PHP_FE(imagepscopyfont,							NULL)
	*/
	PHP_FE(imagepsfreefont,							NULL)
	PHP_FE(imagepsencodefont,						NULL)
	PHP_FE(imagepsextendfont,						NULL)
	PHP_FE(imagepsslantfont,						NULL)
	PHP_FE(imagepstext,								NULL)
	PHP_FE(imagepsbbox,								NULL)
#endif
	PHP_FE(imagetypes,								NULL)

#if defined(HAVE_GD_JPG) && defined(HAVE_GD_WBMP)
	PHP_FE(jpeg2wbmp,								NULL)
#endif
#if defined(HAVE_GD_PNG) && defined(HAVE_GD_WBMP)
	PHP_FE(png2wbmp,								NULL)
#endif
#ifdef HAVE_GD_WBMP
	PHP_FE(image2wbmp,								NULL)
#endif
#if HAVE_GD_BUNDLED
	PHP_FE(imagelayereffect,						NULL)
	PHP_FE(imagecolormatch,							NULL)
#endif

	{NULL, NULL, NULL}
};
/* }}} */

zend_module_entry gd_module_entry = {
	STANDARD_MODULE_HEADER,
	"gd",
	gd_functions,
	PHP_MINIT(gd),
	PHP_MSHUTDOWN(gd),
	NULL,
#if HAVE_LIBGD20 && HAVE_GD_STRINGFT && (HAVE_GD_FONTCACHESHUTDOWN || HAVE_GD_FREEFONTCACHE)
	PHP_RSHUTDOWN(gd),
#else
	NULL,
#endif
	PHP_MINFO(gd),
	NO_VERSION_YET,
	STANDARD_MODULE_PROPERTIES
};

#ifdef COMPILE_DL_GD
ZEND_GET_MODULE(gd)
#endif

/* {{{ php_free_gd_image
 */
static void php_free_gd_image(zend_rsrc_list_entry *rsrc TSRMLS_DC)
{
	gdImageDestroy((gdImagePtr) rsrc->ptr);
}
/* }}} */

/* {{{ php_free_gd_font
 */
static void php_free_gd_font(zend_rsrc_list_entry *rsrc TSRMLS_DC)
{
	gdFontPtr fp = (gdFontPtr) rsrc->ptr;

	if (fp->data) {
		efree(fp->data);
	}

	efree(fp);
}
/* }}} */

/* {{{ PHP_MSHUTDOWN_FUNCTION
 */
PHP_MSHUTDOWN_FUNCTION(gd)
{
#if HAVE_LIBT1
	T1_CloseLib();
#endif
	return SUCCESS;
}
/* }}} */


/* {{{ PHP_MINIT_FUNCTION
 */
PHP_MINIT_FUNCTION(gd)
{
	le_gd = zend_register_list_destructors_ex(php_free_gd_image, NULL, "gd", module_number);
	le_gd_font = zend_register_list_destructors_ex(php_free_gd_font, NULL, "gd font", module_number);
#if HAVE_LIBT1
	T1_SetBitmapPad(8);
	T1_InitLib(NO_LOGFILE | IGNORE_CONFIGFILE | IGNORE_FONTDATABASE);
	T1_SetLogLevel(T1LOG_DEBUG);
	le_ps_font = zend_register_list_destructors_ex(php_free_ps_font, NULL, "gd PS font", module_number);
	le_ps_enc = zend_register_list_destructors_ex(php_free_ps_enc, NULL, "gd PS encoding", module_number);
#endif

	REGISTER_LONG_CONSTANT("IMG_GIF", 1, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("IMG_JPG", 2, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("IMG_JPEG", 2, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("IMG_PNG", 4, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("IMG_WBMP", 8, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("IMG_XPM", 16, CONST_CS | CONST_PERSISTENT);
#ifdef gdTiled
	/* special colours for gd */
	REGISTER_LONG_CONSTANT("IMG_COLOR_TILED", gdTiled, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("IMG_COLOR_STYLED", gdStyled, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("IMG_COLOR_BRUSHED", gdBrushed, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("IMG_COLOR_STYLEDBRUSHED", gdStyledBrushed, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("IMG_COLOR_TRANSPARENT", gdTransparent, CONST_CS | CONST_PERSISTENT);
#endif
#if HAVE_LIBGD20
	/* for imagefilledarc */
	REGISTER_LONG_CONSTANT("IMG_ARC_ROUNDED", gdArc, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("IMG_ARC_PIE", gdPie, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("IMG_ARC_CHORD", gdChord, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("IMG_ARC_NOFILL", gdNoFill, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("IMG_ARC_EDGED", gdEdged, CONST_CS | CONST_PERSISTENT);
#endif
/* GD2 image format types */
#ifdef GD2_FMT_RAW
	REGISTER_LONG_CONSTANT("IMG_GD2_RAW", GD2_FMT_RAW, CONST_CS | CONST_PERSISTENT);
#endif
#ifdef GD2_FMT_COMPRESSED
	REGISTER_LONG_CONSTANT("IMG_GD2_COMPRESSED", GD2_FMT_COMPRESSED, CONST_CS | CONST_PERSISTENT);
#endif
#if HAVE_GD_BUNDLED
	REGISTER_LONG_CONSTANT("IMG_EFFECT_REPLACE", gdEffectReplace, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("IMG_EFFECT_ALPHABLEND", gdEffectAlphaBlend, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("IMG_EFFECT_NORMAL", gdEffectNormal, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("IMG_EFFECT_OVERLAY", gdEffectOverlay, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("GD_BUNDLED", 1, CONST_CS | CONST_PERSISTENT);
#else
	REGISTER_LONG_CONSTANT("GD_BUNDLED", 0, CONST_CS | CONST_PERSISTENT);
#endif
	return SUCCESS;
}
/* }}} */

/* {{{ PHP_RSHUTDOWN_FUNCTION
 */
#if HAVE_LIBGD20 && HAVE_GD_STRINGFT && (HAVE_GD_FONTCACHESHUTDOWN || HAVE_GD_FREEFONTCACHE)
PHP_RSHUTDOWN_FUNCTION(gd)
{
#if HAVE_GD_FONTCACHESHUTDOWN
	gdFontCacheShutdown();
#else
	gdFreeFontCache();
#endif
	return SUCCESS;
}
#endif
/* }}} */

#if HAVE_GD_BUNDLED
#define PHP_GD_VERSION_STRING "bundled (2.0.28 compatible)"
#elif HAVE_LIBGD20
#define PHP_GD_VERSION_STRING "2.0 or higher"
#elif HAVE_GDIMAGECOLORRESOLVE
#define PHP_GD_VERSION_STRING "1.6.2 or higher"
#elif HAVE_LIBGD13
#define PHP_GD_VERSION_STRING "between 1.3 and 1.6.1"
#else
#define PHP_GD_VERSION_STRING "1.2"
#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 */

	php_info_print_table_row(2, "GD Version", PHP_GD_VERSION_STRING);

#ifdef ENABLE_GD_TTF
	php_info_print_table_row(2, "FreeType Support", "enabled");
#if HAVE_LIBFREETYPE
	php_info_print_table_row(2, "FreeType Linkage", "with freetype");
#elif HAVE_LIBTTF
	php_info_print_table_row(2, "FreeType Linkage", "with TTF library");
#else
	php_info_print_table_row(2, "FreeType Linkage", "with unknown library");
#endif
#endif

#ifdef HAVE_LIBT1
	php_info_print_table_row(2, "T1Lib Support", "enabled");
#endif

/* this next part is stupid ... if I knew better, I'd put them all on one row (cmv) */

#ifdef HAVE_GD_GIF_READ
	php_info_print_table_row(2, "GIF Read Support", "enabled");
#endif
#ifdef HAVE_GD_GIF_CREATE
	php_info_print_table_row(2, "GIF Create Support", "enabled");
#endif
#ifdef HAVE_GD_JPG
	php_info_print_table_row(2, "JPG Support", "enabled");
#endif
#ifdef HAVE_GD_PNG
	php_info_print_table_row(2, "PNG Support", "enabled");
#endif
#ifdef HAVE_GD_WBMP
	php_info_print_table_row(2, "WBMP Support", "enabled");
#endif
#ifdef HAVE_GD_XBM
	php_info_print_table_row(2, "XBM Support", "enabled");
#endif
#if defined(USE_GD_JISX0208) && defined(HAVE_GD_BUNDLED)
	php_info_print_table_row(2, "JIS-mapped Japanese Font Support", "enabled");
#endif
	php_info_print_table_end();
}
/* }}} */

/* {{{ proto array gd_info()
 */
PHP_FUNCTION(gd_info)
{
	if (ZEND_NUM_ARGS() != 0) {
		ZEND_WRONG_PARAM_COUNT();