yyc12345/stb
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Sub pixel source area test cases. No problems.

Browse Source
This commit is contained in:
Jorge Rodriguez 2014-07-31 16:31:45 -07:00
parent aae1c7ca41
commit daf325dc03
1 changed files with 42 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
tests/resample_test.cpp
View File

@ -31,7 +31,7 @@ int main(int argc, char** argv)
int n;
int out_w, out_h, out_stride;
#if 0
#if 1
test_suite();
return 0;
#endif
@ -251,8 +251,49 @@ void test_channels(const char* file, float width_percent, float height_percent,
free(output_data);
}
void test_subpixel(const char* file, float width_percent, float height_percent, float s1, float t1)
{
int w, h, n;
unsigned char* input_data = stbi_load(file, &w, &h, &n, 0);
s1 = ((float)w - 1 + s1)/w;
t1 = ((float)h - 1 + t1)/h;
int new_w = (int)(w * width_percent);
int new_h = (int)(h * height_percent);
unsigned char* output_data = (unsigned char*)malloc(new_w * new_h * n * sizeof(unsigned char));
size_t tempmem_size = stbr_calculate_memory(w, h, new_w, new_h, 0, 0, s1, t1, n, STBR_FILTER_CATMULLROM);
void* tempmem = malloc(tempmem_size);
stbr_resize_arbitrary(input_data, w, h, 0, output_data, new_w, new_h, 0, 0, 0, s1, t1, n, STBR_TYPE_UINT8, STBR_FILTER_CATMULLROM, STBR_EDGE_CLAMP, STBR_COLORSPACE_SRGB, tempmem, tempmem_size);
free(tempmem);
stbi_image_free(input_data);
char output[200];
sprintf(output, "test-output/subpixel-%d-%d-%f-%f-%s", new_w, new_h, s1, t1, file);
stbi_write_png(output, new_w, new_h, n, output_data, 0);
free(output_data);
}
void test_suite()
{
for (int i = 0; i < 10; i++)
test_subpixel("barbara.png", 0.5f, 0.5f, (float)i / 10, 1);
for (int i = 0; i < 10; i++)
test_subpixel("barbara.png", 0.5f, 0.5f, 1, (float)i / 10);
for (int i = 0; i < 10; i++)
test_subpixel("barbara.png", 2, 2, (float)i / 10, 1);
for (int i = 0; i < 10; i++)
test_subpixel("barbara.png", 2, 2, 1, (float)i / 10);
// Channels test
test_channels("barbara.png", 0.5f, 0.5f, 1);
test_channels("barbara.png", 0.5f, 0.5f, 2);