2008-11-05 09:21:04 -08:00
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdio.h>
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#include <png.h>
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2008-11-05 12:39:10 -08:00
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#include <setjmp.h>
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2008-11-05 09:21:04 -08:00
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#ifdef HAVE_EVIL
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# include <Evil.h>
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#endif
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2006-01-14 12:03:42 -08:00
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#include "evas_common.h"
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#include "evas_private.h"
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#define PNG_BYTES_TO_CHECK 4
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2009-12-22 15:11:57 -08:00
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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);
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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);
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2006-01-14 12:03:42 -08:00
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2009-06-16 06:01:36 -07:00
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static Evas_Image_Load_Func evas_image_load_png_func =
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2006-01-14 12:03:42 -08:00
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{
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2009-12-24 05:15:34 -08:00
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EINA_TRUE,
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2006-01-14 12:03:42 -08:00
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evas_image_load_file_head_png,
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2011-08-10 23:04:08 -07:00
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evas_image_load_file_data_png,
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2011-12-13 08:58:20 -08:00
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NULL,
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EINA_FALSE
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2006-01-14 12:03:42 -08:00
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};
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2013-01-02 23:57:18 -08:00
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typedef struct _Evas_PNG_Info Evas_PNG_Info;
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struct _Evas_PNG_Info
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{
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unsigned char *map;
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size_t length;
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size_t position;
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};
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static void
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_evas_image_png_read(png_structp png_ptr, png_bytep out, png_size_t count)
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{
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2013-01-03 04:04:37 -08:00
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Evas_PNG_Info *epi = png_get_io_ptr(png_ptr);
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2013-01-02 23:57:18 -08:00
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if (!epi) return ;
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if (epi->position == epi->length) return ;
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if (epi->position + count > epi->length) count = epi->length - epi->position;
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memcpy(out, epi->map + epi->position, count);
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epi->position += count;
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}
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2009-12-22 15:11:57 -08:00
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static Eina_Bool
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2012-11-04 03:51:42 -08:00
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evas_image_load_file_head_png(Image_Entry *ie, const char *file, const char *key EINA_UNUSED, int *error)
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2006-01-14 12:03:42 -08:00
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{
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2013-01-02 23:57:18 -08:00
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Eina_File *f;
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Evas_PNG_Info epi;
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2006-01-14 12:03:42 -08:00
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png_structp png_ptr = NULL;
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png_infop info_ptr = NULL;
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2013-01-02 23:57:18 -08:00
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png_uint_32 w32, h32;
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2006-01-14 12:03:42 -08:00
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int bit_depth, color_type, interlace_type;
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2007-08-24 19:36:18 -07:00
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char hasa;
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2013-01-02 23:57:18 -08:00
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Eina_Bool r = EINA_FALSE;
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2006-01-14 12:03:42 -08:00
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hasa = 0;
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2013-01-02 23:57:18 -08:00
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f = eina_file_open(file, EINA_FALSE);
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2009-12-22 15:11:57 -08:00
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if (!f)
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{
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*error = EVAS_LOAD_ERROR_DOES_NOT_EXIST;
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return EINA_FALSE;
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}
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2006-01-14 12:03:42 -08:00
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2013-01-02 23:57:18 -08:00
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epi.map = eina_file_map_all(f, EINA_FILE_SEQUENTIAL);
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if (!epi.map)
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{
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*error = EVAS_LOAD_ERROR_CORRUPT_FILE;
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goto close_file;
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}
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epi.length = eina_file_size_get(f);
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epi.position = 0;
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if (epi.length < PNG_BYTES_TO_CHECK)
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2009-12-22 15:11:57 -08:00
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{
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*error = EVAS_LOAD_ERROR_UNKNOWN_FORMAT;
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goto close_file;
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}
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2008-11-09 11:32:12 -08:00
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2013-01-02 23:57:18 -08:00
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if (png_sig_cmp(epi.map, 0, PNG_BYTES_TO_CHECK))
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2009-12-22 15:11:57 -08:00
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{
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*error = EVAS_LOAD_ERROR_UNKNOWN_FORMAT;
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goto close_file;
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}
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2008-11-09 11:32:12 -08:00
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2006-01-14 12:03:42 -08:00
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png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
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if (!png_ptr)
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2009-12-22 15:11:57 -08:00
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{
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*error = EVAS_LOAD_ERROR_RESOURCE_ALLOCATION_FAILED;
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goto close_file;
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}
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2008-11-09 11:32:12 -08:00
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2006-01-14 12:03:42 -08:00
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info_ptr = png_create_info_struct(png_ptr);
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if (!info_ptr)
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{
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2009-12-22 15:11:57 -08:00
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*error = EVAS_LOAD_ERROR_RESOURCE_ALLOCATION_FAILED;
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2008-11-09 11:32:12 -08:00
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goto close_file;
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2006-01-14 12:03:42 -08:00
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}
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2013-01-02 23:57:18 -08:00
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png_set_read_fn(png_ptr, &epi, _evas_image_png_read);
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2008-11-06 10:54:19 -08:00
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if (setjmp(png_jmpbuf(png_ptr)))
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2006-01-14 12:03:42 -08:00
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{
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2009-12-22 15:11:57 -08:00
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*error = EVAS_LOAD_ERROR_CORRUPT_FILE;
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2008-11-09 11:32:12 -08:00
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goto close_file;
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2006-01-14 12:03:42 -08:00
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}
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2013-01-02 23:57:18 -08:00
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2006-01-14 12:03:42 -08:00
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png_read_info(png_ptr, info_ptr);
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png_get_IHDR(png_ptr, info_ptr, (png_uint_32 *) (&w32),
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(png_uint_32 *) (&h32), &bit_depth, &color_type,
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&interlace_type, NULL, NULL);
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2009-09-16 02:48:05 -07:00
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if ((w32 < 1) || (h32 < 1) || (w32 > IMG_MAX_SIZE) || (h32 > IMG_MAX_SIZE) ||
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IMG_TOO_BIG(w32, h32))
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2006-11-04 21:07:53 -08:00
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{
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2009-12-22 15:11:57 -08:00
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if (IMG_TOO_BIG(w32, h32))
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*error = EVAS_LOAD_ERROR_RESOURCE_ALLOCATION_FAILED;
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else
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*error = EVAS_LOAD_ERROR_GENERIC;
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2008-11-09 11:32:12 -08:00
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goto close_file;
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2006-11-04 21:07:53 -08:00
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}
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2011-10-19 02:04:34 -07:00
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if (ie->load_opts.scale_down_by > 1)
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{
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ie->w = (int) w32 / ie->load_opts.scale_down_by;
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ie->h = (int) h32 / ie->load_opts.scale_down_by;
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if ((ie->w < 1) || (ie->h < 1))
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{
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*error = EVAS_LOAD_ERROR_GENERIC;
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goto close_file;
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}
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}
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else
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{
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ie->w = (int) w32;
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ie->h = (int) h32;
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}
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2007-08-24 19:36:18 -07:00
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if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)) hasa = 1;
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if (color_type == PNG_COLOR_TYPE_RGB_ALPHA) hasa = 1;
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if (color_type == PNG_COLOR_TYPE_GRAY_ALPHA) hasa = 1;
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2008-06-03 02:09:39 -07:00
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if (hasa) ie->flags.alpha = 1;
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2009-12-22 15:11:57 -08:00
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*error = EVAS_LOAD_ERROR_NONE;
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2013-01-02 23:57:18 -08:00
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r = EINA_TRUE;
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2008-11-09 11:32:12 -08:00
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close_file:
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2013-01-02 23:57:18 -08:00
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if (png_ptr) png_destroy_read_struct(&png_ptr,
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info_ptr ? &info_ptr : NULL,
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NULL);
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if (epi.map) eina_file_map_free(f, epi. map);
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eina_file_close(f);
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return r;
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2006-01-14 12:03:42 -08:00
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}
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2009-12-22 15:11:57 -08:00
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static Eina_Bool
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2012-11-04 03:51:42 -08:00
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evas_image_load_file_data_png(Image_Entry *ie, const char *file, const char *key EINA_UNUSED, int *error)
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2006-01-14 12:03:42 -08:00
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{
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2013-01-02 23:57:18 -08:00
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Eina_File *f;
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2008-06-03 02:09:39 -07:00
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unsigned char *surface;
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2013-01-02 23:57:18 -08:00
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unsigned char **lines;
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unsigned char *tmp_line;
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DATA32 *src_ptr, *dst_ptr;
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2006-01-14 12:03:42 -08:00
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png_structp png_ptr = NULL;
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png_infop info_ptr = NULL;
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2013-01-02 23:57:18 -08:00
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Evas_PNG_Info epi;
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png_uint_32 w32, h32;
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int w, h;
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2006-01-14 12:03:42 -08:00
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int bit_depth, color_type, interlace_type;
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2007-08-24 19:36:18 -07:00
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char hasa;
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2011-10-19 02:04:34 -07:00
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int i, j;
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int scale_ratio = 1, image_w = 0;
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2013-01-02 23:57:18 -08:00
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Eina_Bool r = EINA_FALSE;
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2006-01-14 12:03:42 -08:00
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hasa = 0;
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2013-01-02 23:57:18 -08:00
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f = eina_file_open(file, EINA_FALSE);
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2009-12-22 15:11:57 -08:00
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if (!f)
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{
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*error = EVAS_LOAD_ERROR_DOES_NOT_EXIST;
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return EINA_FALSE;
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}
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2006-01-14 12:03:42 -08:00
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2013-01-02 23:57:18 -08:00
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epi.map = eina_file_map_all(f, EINA_FILE_SEQUENTIAL);
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if (!epi.map)
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2010-09-18 16:39:30 -07:00
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{
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2013-01-02 23:57:18 -08:00
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*error = EVAS_LOAD_ERROR_CORRUPT_FILE;
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2010-09-18 16:39:30 -07:00
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goto close_file;
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}
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2013-01-02 23:57:18 -08:00
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epi.length = eina_file_size_get(f);
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epi.position = 0;
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if (epi.length < PNG_BYTES_TO_CHECK)
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2009-12-22 15:11:57 -08:00
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{
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2013-01-02 23:57:18 -08:00
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*error = EVAS_LOAD_ERROR_UNKNOWN_FORMAT;
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goto close_file;
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}
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/* if we havent read the header before, set the header data */
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if (png_sig_cmp(epi.map, 0, PNG_BYTES_TO_CHECK))
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{
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*error = EVAS_LOAD_ERROR_UNKNOWN_FORMAT;
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2009-12-22 15:11:57 -08:00
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goto close_file;
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}
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2006-01-14 12:03:42 -08:00
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png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
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if (!png_ptr)
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2009-12-22 15:11:57 -08:00
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{
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*error = EVAS_LOAD_ERROR_RESOURCE_ALLOCATION_FAILED;
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goto close_file;
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}
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2008-11-09 11:32:12 -08:00
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2006-01-14 12:03:42 -08:00
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info_ptr = png_create_info_struct(png_ptr);
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if (!info_ptr)
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{
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png_destroy_read_struct(&png_ptr, NULL, NULL);
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2009-12-22 15:11:57 -08:00
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*error = EVAS_LOAD_ERROR_RESOURCE_ALLOCATION_FAILED;
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2008-11-09 11:32:12 -08:00
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goto close_file;
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2006-01-14 12:03:42 -08:00
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}
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2013-01-02 23:57:18 -08:00
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png_set_read_fn(png_ptr, &epi, _evas_image_png_read);
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2008-11-06 10:54:19 -08:00
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if (setjmp(png_jmpbuf(png_ptr)))
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2006-01-14 12:03:42 -08:00
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{
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png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
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2009-12-22 15:11:57 -08:00
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*error = EVAS_LOAD_ERROR_CORRUPT_FILE;
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2008-11-09 11:32:12 -08:00
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goto close_file;
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2006-01-14 12:03:42 -08:00
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}
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2013-01-02 23:57:18 -08:00
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2006-01-14 12:03:42 -08:00
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png_read_info(png_ptr, info_ptr);
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png_get_IHDR(png_ptr, info_ptr, (png_uint_32 *) (&w32),
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(png_uint_32 *) (&h32), &bit_depth, &color_type,
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&interlace_type, NULL, NULL);
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2011-10-19 02:04:34 -07:00
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image_w = w32;
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if (ie->load_opts.scale_down_by > 1)
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{
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scale_ratio = ie->load_opts.scale_down_by;
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w32 /= scale_ratio;
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h32 /= scale_ratio;
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}
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2008-06-03 02:09:39 -07:00
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evas_cache_image_surface_alloc(ie, w32, h32);
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surface = (unsigned char *) evas_cache_image_pixels(ie);
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if (!surface)
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2008-04-11 17:32:30 -07:00
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{
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2009-12-22 15:11:57 -08:00
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*error = EVAS_LOAD_ERROR_RESOURCE_ALLOCATION_FAILED;
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2008-11-09 11:32:12 -08:00
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goto close_file;
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2008-04-11 17:32:30 -07:00
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}
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2008-06-03 02:09:39 -07:00
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if ((w32 != ie->w) || (h32 != ie->h))
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2006-11-04 21:07:53 -08:00
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{
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2009-12-22 15:11:57 -08:00
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*error = EVAS_LOAD_ERROR_GENERIC;
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2008-11-09 11:32:12 -08:00
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goto close_file;
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2006-11-04 21:07:53 -08:00
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}
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2007-08-24 19:36:18 -07:00
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if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)) hasa = 1;
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if (color_type == PNG_COLOR_TYPE_RGB_ALPHA) hasa = 1;
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if (color_type == PNG_COLOR_TYPE_GRAY_ALPHA) hasa = 1;
|
2008-06-03 02:09:39 -07:00
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if (hasa) ie->flags.alpha = 1;
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2006-01-14 12:03:42 -08:00
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2007-08-24 19:36:18 -07:00
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/* Prep for transformations... ultimately we want ARGB */
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/* expand palette -> RGB if necessary */
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if (color_type == PNG_COLOR_TYPE_PALETTE) png_set_palette_to_rgb(png_ptr);
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/* expand gray (w/reduced bits) -> 8-bit RGB if necessary */
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if ((color_type == PNG_COLOR_TYPE_GRAY) ||
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(color_type == PNG_COLOR_TYPE_GRAY_ALPHA))
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{
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png_set_gray_to_rgb(png_ptr);
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if (bit_depth < 8) png_set_expand_gray_1_2_4_to_8(png_ptr);
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}
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/* expand transparency entry -> alpha channel if present */
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if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))
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png_set_tRNS_to_alpha(png_ptr);
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/* reduce 16bit color -> 8bit color if necessary */
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if (bit_depth > 8) png_set_strip_16(png_ptr);
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|
|
|
/* pack all pixels to byte boundaries */
|
|
|
|
png_set_packing(png_ptr);
|
2008-04-11 17:32:30 -07:00
|
|
|
|
2008-06-03 02:09:39 -07:00
|
|
|
w = ie->w;
|
|
|
|
h = ie->h;
|
2006-01-14 12:03:42 -08:00
|
|
|
/* we want ARGB */
|
|
|
|
#ifdef WORDS_BIGENDIAN
|
|
|
|
png_set_swap_alpha(png_ptr);
|
2007-08-24 19:36:18 -07:00
|
|
|
if (!hasa) png_set_filler(png_ptr, 0xff, PNG_FILLER_BEFORE);
|
2006-01-14 12:03:42 -08:00
|
|
|
#else
|
|
|
|
png_set_bgr(png_ptr);
|
2007-08-24 19:36:18 -07:00
|
|
|
if (!hasa) png_set_filler(png_ptr, 0xff, PNG_FILLER_AFTER);
|
2006-01-14 12:03:42 -08:00
|
|
|
#endif
|
|
|
|
|
2011-10-19 02:04:34 -07:00
|
|
|
/* we read image line by line if scale down was set */
|
|
|
|
if (scale_ratio == 1)
|
|
|
|
{
|
|
|
|
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);
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
tmp_line = (unsigned char *) alloca(image_w * sizeof(DATA32));
|
|
|
|
dst_ptr = (DATA32 *)surface;
|
|
|
|
for (i = 0; i < h; i++)
|
|
|
|
{
|
|
|
|
png_read_row(png_ptr, tmp_line, NULL);
|
|
|
|
src_ptr = (DATA32 *)tmp_line;
|
|
|
|
for (j = 0; j < w; j++)
|
|
|
|
{
|
|
|
|
*dst_ptr = *src_ptr;
|
|
|
|
dst_ptr++;
|
|
|
|
src_ptr += scale_ratio;
|
|
|
|
}
|
|
|
|
for (j = 0; j < (scale_ratio - 1); j++)
|
|
|
|
{
|
|
|
|
png_read_row(png_ptr, tmp_line, NULL);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-06-03 02:09:39 -07:00
|
|
|
evas_common_image_premul(ie);
|
2008-04-11 17:32:30 -07:00
|
|
|
|
2009-12-22 15:11:57 -08:00
|
|
|
*error = EVAS_LOAD_ERROR_NONE;
|
2013-01-02 23:57:18 -08:00
|
|
|
r = EINA_TRUE;
|
2008-11-09 11:32:12 -08:00
|
|
|
|
|
|
|
close_file:
|
2013-01-02 23:57:18 -08:00
|
|
|
if (png_ptr) png_destroy_read_struct(&png_ptr,
|
|
|
|
info_ptr ? &info_ptr : NULL,
|
|
|
|
NULL);
|
|
|
|
if (epi.map) eina_file_map_free(f, epi.map);
|
|
|
|
eina_file_close(f);
|
|
|
|
return r;
|
2006-01-14 12:03:42 -08:00
|
|
|
}
|
|
|
|
|
2009-06-16 06:01:36 -07:00
|
|
|
static int
|
2006-09-06 00:28:46 -07:00
|
|
|
module_open(Evas_Module *em)
|
2006-01-14 12:03:42 -08:00
|
|
|
{
|
|
|
|
if (!em) return 0;
|
|
|
|
em->functions = (void *)(&evas_image_load_png_func);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2009-06-16 06:01:36 -07:00
|
|
|
static void
|
2012-11-04 03:51:42 -08:00
|
|
|
module_close(Evas_Module *em EINA_UNUSED)
|
2006-01-14 12:03:42 -08:00
|
|
|
{
|
|
|
|
}
|
|
|
|
|
2009-06-16 06:01:36 -07:00
|
|
|
static Evas_Module_Api evas_modapi =
|
2006-01-14 12:03:42 -08:00
|
|
|
{
|
|
|
|
EVAS_MODULE_API_VERSION,
|
2009-06-16 06:01:36 -07:00
|
|
|
"png",
|
|
|
|
"none",
|
|
|
|
{
|
|
|
|
module_open,
|
|
|
|
module_close
|
|
|
|
}
|
2006-01-14 12:03:42 -08:00
|
|
|
};
|
2009-06-16 06:01:36 -07:00
|
|
|
|
|
|
|
EVAS_MODULE_DEFINE(EVAS_MODULE_TYPE_IMAGE_LOADER, image_loader, png);
|
|
|
|
|
|
|
|
#ifndef EVAS_STATIC_BUILD_PNG
|
|
|
|
EVAS_EINA_MODULE_DEFINE(image_loader, png);
|
|
|
|
#endif
|