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

Tests to ensure images of a solid color stay the same solid color after resampling.

Browse Source
This commit is contained in:
Jorge Rodriguez 2014-09-07 16:47:02 -07:00
parent e6c47ec657
commit 118f28557e
1 changed files with 40 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
tests/resample_test.cpp
View File

@ -566,6 +566,22 @@ void verify_box(void)
STBIR_ASSERT(output11[j][i] == ((t+32)>>6)); STBIR_ASSERT(output11[j][i] == ((t+32)>>6));
} }
void verify_filter_normalized(stbir_filter filter, unsigned char* output, int output_size)
{
int value = 64;
int i, j;
for (j = 0; j < 8; ++j)
for (i = 0; i < 8; ++i)
image88[j][i] = value;
stbir_resize_uint8_generic(image88[0], 8, 8, 0, output, output_size, output_size, 0, 1, -1, 0, STBIR_EDGE_CLAMP, filter, STBIR_COLORSPACE_LINEAR, NULL);
for (j = 0; j < output_size; ++j)
for (i = 0; i < output_size; ++i)
STBIR_ASSERT(value == output[j*output_size + i]);
}
void test_filters(void) void test_filters(void)
{ {
int i,j; int i,j;
@ -588,6 +604,30 @@ void test_filters(void)
for (i=0; i < 8; ++i) for (i=0; i < 8; ++i)
image88[j][i] = i&2 ? 255 : 0; image88[j][i] = i&2 ? 255 : 0;
verify_box(); verify_box();
verify_filter_normalized(STBIR_FILTER_BOX, &output88[0][0], 8);
verify_filter_normalized(STBIR_FILTER_BILINEAR, &output88[0][0], 8);
verify_filter_normalized(STBIR_FILTER_BICUBIC, &output88[0][0], 8);
verify_filter_normalized(STBIR_FILTER_CATMULLROM, &output88[0][0], 8);
verify_filter_normalized(STBIR_FILTER_MITCHELL, &output88[0][0], 8);
verify_filter_normalized(STBIR_FILTER_BOX, &output44[0][0], 4);
verify_filter_normalized(STBIR_FILTER_BILINEAR, &output44[0][0], 4);
verify_filter_normalized(STBIR_FILTER_BICUBIC, &output44[0][0], 4);
verify_filter_normalized(STBIR_FILTER_CATMULLROM, &output44[0][0], 4);
verify_filter_normalized(STBIR_FILTER_MITCHELL, &output44[0][0], 4);
verify_filter_normalized(STBIR_FILTER_BOX, &output22[0][0], 2);
verify_filter_normalized(STBIR_FILTER_BILINEAR, &output22[0][0], 2);
verify_filter_normalized(STBIR_FILTER_BICUBIC, &output22[0][0], 2);
verify_filter_normalized(STBIR_FILTER_CATMULLROM, &output22[0][0], 2);
verify_filter_normalized(STBIR_FILTER_MITCHELL, &output22[0][0], 2);
verify_filter_normalized(STBIR_FILTER_BOX, &output11[0][0], 1);
verify_filter_normalized(STBIR_FILTER_BILINEAR, &output11[0][0], 1);
verify_filter_normalized(STBIR_FILTER_BICUBIC, &output11[0][0], 1);
verify_filter_normalized(STBIR_FILTER_CATMULLROM, &output11[0][0], 1);
verify_filter_normalized(STBIR_FILTER_MITCHELL, &output11[0][0], 1);
} }