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