279 lines
7.5 KiB
C
279 lines
7.5 KiB
C
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
|
|
#include <stdio.h>
|
|
#include <png.h>
|
|
#include <setjmp.h>
|
|
|
|
#ifdef HAVE_EVIL
|
|
# include <Evil.h>
|
|
#endif
|
|
|
|
#ifdef _WIN32_WCE
|
|
# define E_FOPEN(file, mode) evil_fopen_native((file), (mode))
|
|
# define E_FREAD(buffer, size, count, stream) evil_fread_native(buffer, size, count, stream)
|
|
# define E_FCLOSE(stream) evil_fclose_native(stream)
|
|
#else
|
|
# define E_FOPEN(file, mode) fopen((file), (mode))
|
|
# define E_FREAD(buffer, size, count, stream) fread(buffer, size, count, stream)
|
|
# define E_FCLOSE(stream) fclose(stream)
|
|
#endif
|
|
|
|
#include "evas_common.h"
|
|
#include "evas_private.h"
|
|
|
|
|
|
#define PNG_BYTES_TO_CHECK 4
|
|
|
|
|
|
static Eina_Bool evas_image_load_file_head_png(Image_Entry *ie, const char *file, const char *key, int *error) EINA_ARG_NONNULL(1, 2, 4);
|
|
static Eina_Bool evas_image_load_file_data_png(Image_Entry *ie, const char *file, const char *key, int *error) EINA_ARG_NONNULL(1, 2, 4);
|
|
|
|
static Evas_Image_Load_Func evas_image_load_png_func =
|
|
{
|
|
EINA_TRUE,
|
|
evas_image_load_file_head_png,
|
|
evas_image_load_file_data_png
|
|
};
|
|
|
|
static Eina_Bool
|
|
evas_image_load_file_head_png(Image_Entry *ie, const char *file, const char *key __UNUSED__, int *error)
|
|
{
|
|
png_uint_32 w32, h32;
|
|
FILE *f;
|
|
png_structp png_ptr = NULL;
|
|
png_infop info_ptr = NULL;
|
|
int bit_depth, color_type, interlace_type;
|
|
unsigned char buf[PNG_BYTES_TO_CHECK];
|
|
char hasa;
|
|
|
|
hasa = 0;
|
|
f = E_FOPEN(file, "rb");
|
|
if (!f)
|
|
{
|
|
*error = EVAS_LOAD_ERROR_DOES_NOT_EXIST;
|
|
return EINA_FALSE;
|
|
}
|
|
|
|
/* if we havent read the header before, set the header data */
|
|
if (E_FREAD(buf, PNG_BYTES_TO_CHECK, 1, f) != 1)
|
|
{
|
|
*error = EVAS_LOAD_ERROR_UNKNOWN_FORMAT;
|
|
goto close_file;
|
|
}
|
|
|
|
if (png_sig_cmp(buf, 0, PNG_BYTES_TO_CHECK))
|
|
{
|
|
*error = EVAS_LOAD_ERROR_UNKNOWN_FORMAT;
|
|
goto close_file;
|
|
}
|
|
|
|
png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
|
|
if (!png_ptr)
|
|
{
|
|
*error = EVAS_LOAD_ERROR_RESOURCE_ALLOCATION_FAILED;
|
|
goto close_file;
|
|
}
|
|
|
|
info_ptr = png_create_info_struct(png_ptr);
|
|
if (!info_ptr)
|
|
{
|
|
png_destroy_read_struct(&png_ptr, NULL, NULL);
|
|
*error = EVAS_LOAD_ERROR_RESOURCE_ALLOCATION_FAILED;
|
|
goto close_file;
|
|
}
|
|
if (setjmp(png_jmpbuf(png_ptr)))
|
|
{
|
|
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
|
|
*error = EVAS_LOAD_ERROR_CORRUPT_FILE;
|
|
goto close_file;
|
|
}
|
|
png_init_io(png_ptr, f);
|
|
png_set_sig_bytes(png_ptr, PNG_BYTES_TO_CHECK);
|
|
png_read_info(png_ptr, info_ptr);
|
|
png_get_IHDR(png_ptr, info_ptr, (png_uint_32 *) (&w32),
|
|
(png_uint_32 *) (&h32), &bit_depth, &color_type,
|
|
&interlace_type, NULL, NULL);
|
|
if ((w32 < 1) || (h32 < 1) || (w32 > IMG_MAX_SIZE) || (h32 > IMG_MAX_SIZE) ||
|
|
IMG_TOO_BIG(w32, h32))
|
|
{
|
|
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
|
|
if (IMG_TOO_BIG(w32, h32))
|
|
*error = EVAS_LOAD_ERROR_RESOURCE_ALLOCATION_FAILED;
|
|
else
|
|
*error = EVAS_LOAD_ERROR_GENERIC;
|
|
goto close_file;
|
|
}
|
|
ie->w = (int) w32;
|
|
ie->h = (int) h32;
|
|
if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)) hasa = 1;
|
|
if (color_type == PNG_COLOR_TYPE_RGB_ALPHA) hasa = 1;
|
|
if (color_type == PNG_COLOR_TYPE_GRAY_ALPHA) hasa = 1;
|
|
if (hasa) ie->flags.alpha = 1;
|
|
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
|
|
E_FCLOSE(f);
|
|
|
|
*error = EVAS_LOAD_ERROR_NONE;
|
|
return EINA_TRUE;
|
|
|
|
close_file:
|
|
E_FCLOSE(f);
|
|
return EINA_FALSE;
|
|
}
|
|
|
|
static Eina_Bool
|
|
evas_image_load_file_data_png(Image_Entry *ie, const char *file, const char *key __UNUSED__, int *error)
|
|
{
|
|
unsigned char *surface;
|
|
png_uint_32 w32, h32;
|
|
int w, h;
|
|
FILE *f;
|
|
png_structp png_ptr = NULL;
|
|
png_infop info_ptr = NULL;
|
|
int bit_depth, color_type, interlace_type;
|
|
unsigned char buf[PNG_BYTES_TO_CHECK];
|
|
unsigned char **lines;
|
|
char hasa;
|
|
int i;
|
|
|
|
hasa = 0;
|
|
f = E_FOPEN(file, "rb");
|
|
if (!f)
|
|
{
|
|
*error = EVAS_LOAD_ERROR_DOES_NOT_EXIST;
|
|
return EINA_FALSE;
|
|
}
|
|
|
|
/* if we havent read the header before, set the header data */
|
|
if (E_FREAD(buf, PNG_BYTES_TO_CHECK, 1, f) != 1)
|
|
{
|
|
*error = EVAS_LOAD_ERROR_CORRUPT_FILE;
|
|
goto close_file;
|
|
}
|
|
if (png_sig_cmp(buf, 0, PNG_BYTES_TO_CHECK))
|
|
{
|
|
*error = EVAS_LOAD_ERROR_CORRUPT_FILE;
|
|
goto close_file;
|
|
}
|
|
png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
|
|
if (!png_ptr)
|
|
{
|
|
*error = EVAS_LOAD_ERROR_RESOURCE_ALLOCATION_FAILED;
|
|
goto close_file;
|
|
}
|
|
|
|
info_ptr = png_create_info_struct(png_ptr);
|
|
if (!info_ptr)
|
|
{
|
|
png_destroy_read_struct(&png_ptr, NULL, NULL);
|
|
*error = EVAS_LOAD_ERROR_RESOURCE_ALLOCATION_FAILED;
|
|
goto close_file;
|
|
}
|
|
if (setjmp(png_jmpbuf(png_ptr)))
|
|
{
|
|
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
|
|
*error = EVAS_LOAD_ERROR_CORRUPT_FILE;
|
|
goto close_file;
|
|
}
|
|
png_init_io(png_ptr, f);
|
|
png_set_sig_bytes(png_ptr, PNG_BYTES_TO_CHECK);
|
|
png_read_info(png_ptr, info_ptr);
|
|
png_get_IHDR(png_ptr, info_ptr, (png_uint_32 *) (&w32),
|
|
(png_uint_32 *) (&h32), &bit_depth, &color_type,
|
|
&interlace_type, NULL, NULL);
|
|
evas_cache_image_surface_alloc(ie, w32, h32);
|
|
surface = (unsigned char *) evas_cache_image_pixels(ie);
|
|
if (!surface)
|
|
{
|
|
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
|
|
*error = EVAS_LOAD_ERROR_RESOURCE_ALLOCATION_FAILED;
|
|
goto close_file;
|
|
}
|
|
if ((w32 != ie->w) || (h32 != ie->h))
|
|
{
|
|
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
|
|
*error = EVAS_LOAD_ERROR_GENERIC;
|
|
goto close_file;
|
|
}
|
|
if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)) hasa = 1;
|
|
if (color_type == PNG_COLOR_TYPE_RGB_ALPHA) hasa = 1;
|
|
if (color_type == PNG_COLOR_TYPE_GRAY_ALPHA) hasa = 1;
|
|
if (hasa) ie->flags.alpha = 1;
|
|
|
|
/* Prep for transformations... ultimately we want ARGB */
|
|
/* expand palette -> RGB if necessary */
|
|
if (color_type == PNG_COLOR_TYPE_PALETTE) png_set_palette_to_rgb(png_ptr);
|
|
/* expand gray (w/reduced bits) -> 8-bit RGB if necessary */
|
|
if ((color_type == PNG_COLOR_TYPE_GRAY) ||
|
|
(color_type == PNG_COLOR_TYPE_GRAY_ALPHA))
|
|
{
|
|
png_set_gray_to_rgb(png_ptr);
|
|
if (bit_depth < 8) png_set_expand_gray_1_2_4_to_8(png_ptr);
|
|
}
|
|
/* expand transparency entry -> alpha channel if present */
|
|
if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))
|
|
png_set_tRNS_to_alpha(png_ptr);
|
|
/* reduce 16bit color -> 8bit color if necessary */
|
|
if (bit_depth > 8) png_set_strip_16(png_ptr);
|
|
/* pack all pixels to byte boundaries */
|
|
png_set_packing(png_ptr);
|
|
|
|
w = ie->w;
|
|
h = ie->h;
|
|
/* we want ARGB */
|
|
#ifdef WORDS_BIGENDIAN
|
|
png_set_swap_alpha(png_ptr);
|
|
if (!hasa) png_set_filler(png_ptr, 0xff, PNG_FILLER_BEFORE);
|
|
#else
|
|
png_set_bgr(png_ptr);
|
|
if (!hasa) png_set_filler(png_ptr, 0xff, PNG_FILLER_AFTER);
|
|
#endif
|
|
lines = (unsigned char **) alloca(h * sizeof(unsigned char *));
|
|
|
|
for (i = 0; i < h; i++)
|
|
lines[i] = surface + (i * w * sizeof(DATA32));
|
|
png_read_image(png_ptr, lines);
|
|
png_read_end(png_ptr, info_ptr);
|
|
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
|
|
E_FCLOSE(f);
|
|
evas_common_image_premul(ie);
|
|
|
|
*error = EVAS_LOAD_ERROR_NONE;
|
|
return EINA_TRUE;
|
|
|
|
close_file:
|
|
E_FCLOSE(f);
|
|
return EINA_FALSE;
|
|
}
|
|
|
|
static int
|
|
module_open(Evas_Module *em)
|
|
{
|
|
if (!em) return 0;
|
|
em->functions = (void *)(&evas_image_load_png_func);
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
module_close(Evas_Module *em __UNUSED__)
|
|
{
|
|
}
|
|
|
|
static Evas_Module_Api evas_modapi =
|
|
{
|
|
EVAS_MODULE_API_VERSION,
|
|
"png",
|
|
"none",
|
|
{
|
|
module_open,
|
|
module_close
|
|
}
|
|
};
|
|
|
|
EVAS_MODULE_DEFINE(EVAS_MODULE_TYPE_IMAGE_LOADER, image_loader, png);
|
|
|
|
#ifndef EVAS_STATIC_BUILD_PNG
|
|
EVAS_EINA_MODULE_DEFINE(image_loader, png);
|
|
#endif
|