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anim_diff: add a -raw_comparison flag

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If this flag is not used, RGB is premultiplied before comparison.
Otherwise, the raw R/G/B values are compared, which can be a problem
in transparent area (alpha=0 R/G/B=anything)

Change-Id: I131cc10ec92414ad508b81f599a60d0097cac470
This commit is contained in:
Pascal Massimino
2015-07-07 22:45:49 +00:00
committed by James Zern
parent 155c1b222b
commit acb297e9c2
3 changed files with 40 additions and 12 deletions
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11
examples/anim_diff.cc
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@ -37,6 +37,7 @@ bool CompareValues(T a, T b, const std::string& output_str) {
// is OK for other aspects like offsets, dispose/blend method to vary.
bool CompareAnimatedImagePair(const AnimatedImage& img1,
const AnimatedImage& img2,
bool premultiply,
double min_psnr) {
bool ok = true;
ok = CompareValues(img1.canvas_width, img2.canvas_width,
@ -68,7 +69,7 @@ bool CompareAnimatedImagePair(const AnimatedImage& img1,
int max_diff;
double psnr;
GetDiffAndPSNR(rgba1, rgba2, img1.canvas_width, img1.canvas_height,
&max_diff, &psnr);
premultiply, &max_diff, &psnr);
if (min_psnr > 0.) {
if (psnr < min_psnr) {
fprintf(stderr, "Frame #%zu, psnr = %.2lf (min_psnr = %f)\n", i,
@ -87,7 +88,7 @@ bool CompareAnimatedImagePair(const AnimatedImage& img1,
void Help() {
printf("\nUsage: anim_diff <image1> <image2> [-dump_frames <folder>] "
"[-min_psnr <float>]\n");
"[-min_psnr <float>][-raw_comparison]\n");
}
} // namespace
@ -98,6 +99,7 @@ int main(int argc, const char* argv[]) {
double min_psnr = 0.;
bool got_input1 = false;
bool got_input2 = false;
bool premultiply = true;
const char* files[2];
if (argc < 3) {
@ -127,6 +129,8 @@ int main(int argc, const char* argv[]) {
} else {
parse_error = true;
}
} else if (!strcmp(argv[c], "-raw_comparison")) {
premultiply = false;
} else {
if (!got_input1) {
files[0] = argv[c];
@ -161,7 +165,8 @@ int main(int argc, const char* argv[]) {
}
}
if (!CompareAnimatedImagePair(images[0], images[1], min_psnr)) {
if (!CompareAnimatedImagePair(images[0], images[1],
premultiply, min_psnr)) {
fprintf(stderr, "\nFiles %s and %s differ.\n", files[0], files[1]);
return -3;
}