blob: d7d6691550b2113b4991d157c68d9155f8a7e453 [file] [log] [blame]
#include "DMUtil.h"
#include "SkColorPriv.h"
#include "SkPicture.h"
#include "SkPictureRecorder.h"
namespace DM {
SkString UnderJoin(const char* a, const char* b) {
SkString s;
s.appendf("%s_%s", a, b);
return s;
}
SkPicture* RecordPicture(skiagm::GM* gm, uint32_t recordFlags, SkBBHFactory* factory) {
const SkISize size = gm->getISize();
SkPictureRecorder recorder;
SkCanvas* canvas = recorder.beginRecording(size.width(), size.height(), factory, recordFlags);
canvas->concat(gm->getInitialTransform());
gm->draw(canvas);
canvas->flush();
return recorder.endRecording();
}
void AllocatePixels(SkColorType ct, int width, int height, SkBitmap* bitmap) {
bitmap->allocPixels(SkImageInfo::Make(width, height, ct, kPremul_SkAlphaType));
bitmap->eraseColor(0x00000000);
}
void AllocatePixels(const SkBitmap& reference, SkBitmap* bitmap) {
AllocatePixels(reference.colorType(), reference.width(), reference.height(), bitmap);
}
void DrawPicture(SkPicture* picture, SkBitmap* bitmap) {
SkASSERT(picture != NULL);
SkASSERT(bitmap != NULL);
SkCanvas canvas(*bitmap);
canvas.drawPicture(*picture);
canvas.flush();
}
static void unpack_565(uint16_t pixel, unsigned* r, unsigned* g, unsigned* b) {
*r = SkGetPackedR16(pixel);
*g = SkGetPackedG16(pixel);
*b = SkGetPackedB16(pixel);
}
// Returns |a-b|.
static unsigned abs_diff(unsigned a, unsigned b) {
return a > b ? a - b : b - a;
}
unsigned MaxComponentDifference(const SkBitmap& a, const SkBitmap& b) {
if (a.info() != b.info()) {
SkFAIL("Can't compare bitmaps of different shapes.");
}
unsigned max = 0;
const SkAutoLockPixels lockA(a), lockB(b);
if (a.info().colorType() == kRGB_565_SkColorType) {
// 565 is special/annoying because its 3 components straddle 2 bytes.
const uint16_t* aPixels = (const uint16_t*)a.getPixels();
const uint16_t* bPixels = (const uint16_t*)b.getPixels();
for (size_t i = 0; i < a.getSize() / 2; i++) {
unsigned ar, ag, ab,
br, bg, bb;
unpack_565(aPixels[i], &ar, &ag, &ab);
unpack_565(bPixels[i], &br, &bg, &bb);
max = SkTMax(max, abs_diff(ar, br));
max = SkTMax(max, abs_diff(ag, bg));
max = SkTMax(max, abs_diff(ab, bb));
}
} else {
// Everything else we produce is byte aligned, so max component diff == max byte diff.
const uint8_t* aBytes = (const uint8_t*)a.getPixels();
const uint8_t* bBytes = (const uint8_t*)b.getPixels();
for (size_t i = 0; i < a.getSize(); i++) {
max = SkTMax(max, abs_diff(aBytes[i], bBytes[i]));
}
}
return max;
}
bool BitmapsEqual(const SkBitmap& a, const SkBitmap& b) {
return a.info() == b.info() && 0 == MaxComponentDifference(a, b);
}
} // namespace DM