209 lines
4.5 KiB
C
209 lines
4.5 KiB
C
#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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#ifdef HAVE_EVIL
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# include <Evil.h>
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#endif
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#include "evas_common.h"
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#include "evas_private.h"
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static int
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read_mb(unsigned int *data, void *map, size_t length, size_t *position)
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{
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int ac = 0, ct;
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unsigned char buf;
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for (ct = 0;;)
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{
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if ((ct++) == 5) return -1;
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if (*position > length) return -1;
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buf = ((unsigned char *) map)[(*position)++];
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ac = (ac << 7) | (buf & 0x7f);
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if ((buf & 0x80) == 0) break;
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}
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*data = ac;
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return 0;
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}
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static void *
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evas_image_load_file_open_wbmp(Eina_File *f, const char *key EINA_UNUSED,
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Evas_Image_Load_Opts *opts EINA_UNUSED,
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Evas_Image_Animated *animated EINA_UNUSED,
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int *error EINA_UNUSED)
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{
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return f;
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}
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static void
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evas_image_load_file_close_wbmp(void *loader_data EINA_UNUSED)
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{
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}
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static Eina_Bool
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evas_image_load_file_head_wbmp(void *loader_data,
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Evas_Image_Property *prop,
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int *error)
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{
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Eina_File *f = loader_data;
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void *map = NULL;
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size_t position = 0;
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size_t length;
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unsigned int type, w, h;
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Eina_Bool r = EINA_FALSE;
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*error = EVAS_LOAD_ERROR_GENERIC;
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length = eina_file_size_get(f);
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if (length <= 4) goto bail;
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map = eina_file_map_all(f, EINA_FILE_SEQUENTIAL);
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if (!map) goto bail;
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if (read_mb(&type, map, length, &position) < 0) goto bail;
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if (type != 0)
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{
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*error = EVAS_LOAD_ERROR_UNKNOWN_FORMAT;
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goto bail;
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}
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position++; /* skipping one byte */
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if (read_mb(&w, map, length, &position) < 0) goto bail;
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if (read_mb(&h, map, length, &position) < 0) goto bail;
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if ((w < 1) || (h < 1) || (w > IMG_MAX_SIZE) || (h > IMG_MAX_SIZE) ||
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IMG_TOO_BIG(w, h))
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{
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*error = EVAS_LOAD_ERROR_RESOURCE_ALLOCATION_FAILED;
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goto bail;
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}
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prop->w = w;
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prop->h = h;
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*error = EVAS_LOAD_ERROR_NONE;
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r = EINA_TRUE;
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bail:
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if (map) eina_file_map_free(f, map);
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return r;
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}
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static Eina_Bool
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evas_image_load_file_data_wbmp(void *loader_data,
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Evas_Image_Property *prop,
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void *pixels,
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int *error)
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{
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Eina_File *f = loader_data;
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void *map = NULL;
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size_t position = 0;
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size_t length;
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unsigned int type, w, h;
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unsigned int line_length;
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unsigned char *line = NULL;
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int cur = 0, x, y;
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DATA32 *dst_data;
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Eina_Bool r = EINA_FALSE;
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*error = EVAS_LOAD_ERROR_GENERIC;
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length = eina_file_size_get(f);
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if (length <= 4) goto bail;
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map = eina_file_map_all(f, EINA_FILE_SEQUENTIAL);
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if (!map) goto bail;
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if (read_mb(&type, map, length, &position) < 0) goto bail;
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position++; /* skipping one byte */
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if (read_mb(&w, map, length, &position) < 0) goto bail;
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if (read_mb(&h, map, length, &position) < 0) goto bail;
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if (type != 0)
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{
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*error = EVAS_LOAD_ERROR_UNKNOWN_FORMAT;
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goto bail;
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}
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if ((w < 1) || (h < 1) || (w > IMG_MAX_SIZE) || (h > IMG_MAX_SIZE) ||
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IMG_TOO_BIG(w, h))
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{
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*error = EVAS_LOAD_ERROR_RESOURCE_ALLOCATION_FAILED;
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goto bail;
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}
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if (prop->w != w || prop->h != h)
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{
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*error = EVAS_LOAD_ERROR_RESOURCE_ALLOCATION_FAILED;
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goto bail;
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}
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dst_data = pixels;
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line_length = (prop->w + 7) >> 3;
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for (y = 0; y < (int)prop->h; y++)
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{
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if (position + line_length > length) goto bail;
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line = ((unsigned char*) map) + position;
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position += line_length;
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for (x = 0; x < (int)prop->w; x++)
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{
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int idx = x >> 3;
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int offset = 1 << (0x07 - (x & 0x07));
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if (line[idx] & offset) dst_data[cur] = 0xffffffff;
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else dst_data[cur] = 0xff000000;
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cur++;
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}
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}
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*error = EVAS_LOAD_ERROR_NONE;
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r = EINA_TRUE;
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bail:
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if (map) eina_file_map_free(f, map);
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return r;
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}
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static Evas_Image_Load_Func evas_image_load_wbmp_func =
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{
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EINA_TRUE,
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evas_image_load_file_open_wbmp,
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evas_image_load_file_close_wbmp,
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evas_image_load_file_head_wbmp,
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evas_image_load_file_data_wbmp,
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NULL,
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EINA_FALSE
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};
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static int
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module_open(Evas_Module *em)
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{
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if (!em) return 0;
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em->functions = (void *)(&evas_image_load_wbmp_func);
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return 1;
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}
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static void
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module_close(Evas_Module *em EINA_UNUSED)
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{
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}
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static Evas_Module_Api evas_modapi =
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{
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EVAS_MODULE_API_VERSION,
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"wbmp",
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"none",
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{
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module_open,
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module_close
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}
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};
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EVAS_MODULE_DEFINE(EVAS_MODULE_TYPE_IMAGE_LOADER, image_loader, wbmp);
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#ifndef EVAS_STATIC_BUILD_WBMP
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EVAS_EINA_MODULE_DEFINE(image_loader, wbmp);
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#endif
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