*error = EVAS_LOAD_ERROR_GENERIC;
goto close_file;
}
- if (opts->scale_down_by > 1)
+
+ if (opts->region.w > 0 && opts->region.h > 0)
+ {
+ if ((w32 < opts->region.x + opts->region.w) ||
+ (h32 < opts->region.y + opts->region.h))
+ {
+ *error = EVAS_LOAD_ERROR_GENERIC;
+ goto close_file;
+ }
+ if(opts->scale_down_by > 1)
+ {
+ prop->w = opts->region.w / opts->scale_down_by;
+ prop->h = opts->region.h / opts->scale_down_by;
+ }
+ else
+ {
+ prop->w = opts->region.w;
+ prop->h = opts->region.h;
+ }
+ }
+ else if (opts->scale_down_by > 1)
{
prop->w = (int) w32 / opts->scale_down_by;
prop->h = (int) h32 / opts->scale_down_by;
char passes;
int i, j, p, k;
volatile int scale_ratio = 1;
+ volatile int region_set = 0;
int image_w = 0, image_h = 0;
volatile Eina_Bool r = EINA_FALSE;
w32 /= scale_ratio;
h32 /= scale_ratio;
}
+
+ if ((opts->region.w > 0 && opts->region.h > 0) &&
+ (opts->region.w != image_w || opts->region.h != image_h))
+ {
+ w32 = opts->region.w / scale_ratio;
+ h32 = opts->region.h / scale_ratio;
+ region_set = 1;
+ }
+
if (prop->w != w32 ||
prop->h != h32)
{
- *error = EVAS_LOAD_ERROR_GENERIC;
- goto close_file;
+ *error = EVAS_LOAD_ERROR_GENERIC;
+ goto close_file;
}
surface = pixels;
passes = png_set_interlace_handling(png_ptr);
/* we read image line by line if scale down was set */
- if (scale_ratio == 1)
+ if (scale_ratio == 1 && region_set == 0)
{
for (p = 0; p < passes; p++)
{
else
{
unsigned char *src_ptr, *dst_ptr;
-
+ int skip_row = 0, region_x = 0, region_y = 0;
dst_ptr = surface;
+
+ if (region_set)
+ {
+ region_x = opts->region.x;
+ region_y = opts->region.y;
+ }
+
if (passes == 1)
{
tmp_line = (unsigned char *) alloca(image_w * pack_offset);
+
+ for (skip_row = 0; skip_row < region_y; skip_row++)
+ png_read_row(png_ptr, tmp_line, NULL);
+
for (i = 0; i < h; i++)
{
png_read_row(png_ptr, tmp_line, NULL);
- src_ptr = tmp_line;
+ src_ptr = tmp_line + region_x * pack_offset;
for (j = 0; j < w; j++)
{
for (k = 0; k < (int)pack_offset; k++)
for (j = 0; j < (scale_ratio - 1); j++)
png_read_row(png_ptr, tmp_line, NULL);
}
+ for (skip_row = region_y + h * scale_ratio; skip_row < image_h; skip_row++)
+ png_read_row(png_ptr, tmp_line, NULL);
}
else
{
for (i = 0; i < image_h; i++)
png_read_row(png_ptr, pixels2 + (i * image_w * pack_offset), NULL);
}
-
+
+ src_ptr = pixels2 + (region_y * image_w * pack_offset) + region_x * pack_offset;
+
for (i = 0; i < h; i++)
{
- src_ptr = pixels2 + (i * scale_ratio * image_w * pack_offset);
for (j = 0; j < w; j++)
{
for (k = 0; k < (int)pack_offset; k++)
- dst_ptr[k] = src_ptr[k];
- src_ptr += scale_ratio * pack_offset;
+ dst_ptr[k] = src_ptr[k + scale_ratio * j * pack_offset];
dst_ptr += pack_offset;
}
+ src_ptr += scale_ratio * image_w * pack_offset;
}
free(pixels2);
}