diff options
Diffstat (limited to 'samplecode/SampleDitherBitmap.cpp')
| -rw-r--r-- | samplecode/SampleDitherBitmap.cpp | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/samplecode/SampleDitherBitmap.cpp b/samplecode/SampleDitherBitmap.cpp index bd604cf84c..35816a213a 100644 --- a/samplecode/SampleDitherBitmap.cpp +++ b/samplecode/SampleDitherBitmap.cpp @@ -10,7 +10,7 @@ static SkBitmap make_bitmap() { SkPMColor* c = ctable->lockColors(); for (int i = 0; i < 256; i++) { - c[i] = SkPackARGB32(0xFF, 0, 0, i); + c[i] = SkPackARGB32(0xFF, i, 0, 0); } ctable->unlockColors(true); bm.setConfig(SkBitmap::kIndex8_Config, 256, 32); @@ -51,12 +51,31 @@ protected: canvas->drawColor(0xFFDDDDDD); } + static void setBitmapOpaque(SkBitmap* bm, bool isOpaque) { + SkAutoLockPixels alp(*bm); // needed for ctable + bm->setIsOpaque(isOpaque); + SkColorTable* ctable = bm->getColorTable(); + if (ctable) { + ctable->setIsOpaque(isOpaque); + } + } + static void draw2(SkCanvas* canvas, const SkBitmap& bm) { SkPaint paint; - - canvas->drawBitmap(bm, 0, 0, &paint); + SkBitmap bitmap(bm); + + setBitmapOpaque(&bitmap, false); + paint.setDither(false); + canvas->drawBitmap(bitmap, 0, 0, &paint); + paint.setDither(true); + canvas->drawBitmap(bitmap, 0, SkIntToScalar(bm.height() + 10), &paint); + + setBitmapOpaque(&bitmap, true); + SkScalar x = SkIntToScalar(bm.width() + 10); + paint.setDither(false); + canvas->drawBitmap(bitmap, x, 0, &paint); paint.setDither(true); - canvas->drawBitmap(bm, 0, SkIntToScalar(bm.height() + 10), &paint); + canvas->drawBitmap(bitmap, x, SkIntToScalar(bm.height() + 10), &paint); } virtual void onDraw(SkCanvas* canvas) { |