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#include "DMUtil.h"
#include "SkColorPriv.h"
#include "SkCommandLineFlags.h"
#include "SkPicture.h"
#include "SkPictureRecorder.h"
DEFINE_string(matrix, "1 0 0 0 1 0 0 0 1",
"Matrix to apply to the canvas before drawing.");
namespace DM {
void CanvasPreflight(SkCanvas* canvas) {
if (FLAGS_matrix.count() == 9) {
SkMatrix m;
for (int i = 0; i < 9; i++) {
m[i] = (SkScalar)atof(FLAGS_matrix[i]);
}
canvas->concat(m);
}
}
SkString UnderJoin(const char* a, const char* b) {
SkString s;
s.appendf("%s_%s", a, b);
return s;
}
SkString FileToTaskName(SkString filename) {
for (size_t i = 0; i < filename.size(); i++) {
if ('_' == filename[i]) { filename[i] = '-'; }
if ('.' == filename[i]) { filename[i] = '_'; }
}
return filename;
}
SkPicture* RecordPicture(skiagm::GM* gm, SkBBHFactory* factory) {
const SkScalar w = SkIntToScalar(gm->getISize().width()),
h = SkIntToScalar(gm->getISize().height());
SkPictureRecorder recorder;
SkCanvas* canvas = recorder.beginRecording(w, h, factory);
CanvasPreflight(canvas);
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(const SkPicture& picture, SkBitmap* bitmap) {
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) {
if (a.info() != b.info()) {
return false;
}
const SkAutoLockPixels lockA(a), lockB(b);
return 0 == memcmp(a.getPixels(), b.getPixels(), a.getSize());
}
} // namespace DM
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