| /* |
| * Copyright 2013 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gm/gm.h" |
| #include "include/core/SkBitmap.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkColor.h" |
| #include "include/core/SkImageInfo.h" |
| #include "include/core/SkPixmap.h" |
| #include "include/core/SkScalar.h" |
| #include "include/core/SkSize.h" |
| #include "include/core/SkString.h" |
| #include "include/core/SkTypes.h" |
| #include "tools/DecodeUtils.h" |
| #include "tools/Resources.h" |
| #include "tools/ToolUtils.h" |
| |
| namespace { |
| /** |
| * Test copying an image from 8888 to 4444. |
| */ |
| class CopyTo4444GM : public skiagm::GM { |
| SkString getName() const override { return SkString("copyTo4444"); } |
| |
| SkISize getISize() override { return {360, 180}; } |
| |
| DrawResult onDraw(SkCanvas* canvas, SkString* errorMsg) override { |
| SkBitmap bm, bm4444; |
| if (!ToolUtils::GetResourceAsBitmap("images/dog.jpg", &bm)) { |
| *errorMsg = "Could not decode the file. Did you forget to set the resourcePath?"; |
| return DrawResult::kFail; |
| } |
| canvas->drawImage(bm.asImage(), 0, 0); |
| |
| // This should dither or we will see artifacts in the background of the image. |
| SkAssertResult(ToolUtils::copy_to(&bm4444, kARGB_4444_SkColorType, bm)); |
| canvas->drawImage(bm4444.asImage(), SkIntToScalar(bm.width()), 0); |
| return DrawResult::kOk; |
| } |
| }; |
| } // namespace |
| |
| DEF_GM( return new CopyTo4444GM; ) |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_SIMPLE_GM(format4444, canvas, 64, 64) { |
| canvas->scale(16, 16); |
| SkBitmap bitmap; |
| SkImageInfo imageInfo = SkImageInfo::Make(1, 1, kARGB_4444_SkColorType, kPremul_SkAlphaType); |
| bitmap.allocPixels(imageInfo); |
| SkCanvas offscreen(bitmap); |
| offscreen.clear(SK_ColorRED); |
| canvas->drawImage(bitmap.asImage(), 0, 0); |
| offscreen.clear(SK_ColorBLUE); |
| canvas->drawImage(bitmap.asImage(), 1, 1); |
| auto pack4444 = [](unsigned a, unsigned r, unsigned g, unsigned b) -> uint16_t { |
| return (a << 0) | (b << 4) | (g << 8) | (r << 12); |
| }; |
| uint16_t red4444 = pack4444(0xF, 0xF, 0x0, 0x0); |
| uint16_t blue4444 = pack4444(0xF, 0x0, 0x0, 0x0F); |
| SkPixmap redPixmap(imageInfo, &red4444, 2); |
| if (bitmap.writePixels(redPixmap, 0, 0)) { |
| canvas->drawImage(bitmap.asImage(), 2, 2); |
| } |
| SkPixmap bluePixmap(imageInfo, &blue4444, 2); |
| if (bitmap.writePixels(bluePixmap, 0, 0)) { |
| canvas->drawImage(bitmap.asImage(), 3, 3); |
| } |
| } |