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Fix float conversion.

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This commit is contained in:
Jorge Rodriguez 2014-07-30 08:47:55 -07:00
parent 6625259959
commit 59cb71ea18
1 changed files with 48 additions and 4 deletions
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52
tests/resample_test.cpp
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@ -166,6 +166,50 @@ void test_format(const char* file, float width_percent, float height_percent, st
free(output_data);
}
void convert_image_float(const unsigned char* input, float* output, int length)
{
for (int i = 0; i < length; i++)
output[i] = ((float)input[i])/255;
}
void convert_image_float(const float* input, unsigned char* output, int length)
{
for (int i = 0; i < length; i++)
output[i] = (unsigned char)(input[i] * 255);
}
void test_float(const char* file, float width_percent, float height_percent, stbr_type type, stbr_colorspace colorspace)
{
int w, h, n;
unsigned char* input_data = stbi_load(file, &w, &h, &n, 0);
int new_w = (int)(w * width_percent);
int new_h = (int)(h * height_percent);
float* T_data = (float*)malloc(w * h * n * sizeof(float));
convert_image_float(input_data, T_data, w * h * n);
float* output_data = (float*)malloc(new_w * new_h * n * sizeof(float));
size_t required = stbr_calculate_memory(w, h, new_w, new_h, n, STBR_FILTER_CATMULLROM);
void* extra_memory = malloc(required);
stbr_resize_arbitrary(T_data, w, h, 0, output_data, new_w, new_h, 0, n, type, STBR_FILTER_CATMULLROM, STBR_EDGE_CLAMP, colorspace, extra_memory, required);
free(extra_memory);
free(T_data);
stbi_image_free(input_data);
unsigned char* char_data = (unsigned char*)malloc(new_w * new_h * n * sizeof(char));
convert_image_float(output_data, char_data, new_w * new_h * n);
char output[200];
sprintf(output, "test-output/type-%d-%d-%d-%d-%s", type, colorspace, new_w, new_h, file);
stbi_write_png(output, new_w, new_h, n, char_data, 0);
free(char_data);
free(output_data);
}
void test_suite()
{
// sRGB tests
@ -218,10 +262,10 @@ void test_suite()
test_format<unsigned int>("barbara.png", 2.0, 0.5, STBR_TYPE_UINT32, STBR_COLORSPACE_SRGB);
test_format<unsigned int>("barbara.png", 2.0, 0.5, STBR_TYPE_UINT32, STBR_COLORSPACE_LINEAR);
test_format<float>("barbara.png", 0.5, 2.0, STBR_TYPE_FLOAT, STBR_COLORSPACE_SRGB);
test_format<float>("barbara.png", 0.5, 2.0, STBR_TYPE_FLOAT, STBR_COLORSPACE_LINEAR);
test_format<float>("barbara.png", 2.0, 0.5, STBR_TYPE_FLOAT, STBR_COLORSPACE_SRGB);
test_format<float>("barbara.png", 2.0, 0.5, STBR_TYPE_FLOAT, STBR_COLORSPACE_LINEAR);
test_float("barbara.png", 0.5, 2.0, STBR_TYPE_FLOAT, STBR_COLORSPACE_SRGB);
test_float("barbara.png", 0.5, 2.0, STBR_TYPE_FLOAT, STBR_COLORSPACE_LINEAR);
test_float("barbara.png", 2.0, 0.5, STBR_TYPE_FLOAT, STBR_COLORSPACE_SRGB);
test_float("barbara.png", 2.0, 0.5, STBR_TYPE_FLOAT, STBR_COLORSPACE_LINEAR);
}