| /* |
| * 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/SkBlendMode.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkColor.h" |
| #include "include/core/SkColorPriv.h" |
| #include "include/core/SkFont.h" |
| #include "include/core/SkMatrix.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkRect.h" |
| #include "include/core/SkRefCnt.h" |
| #include "include/core/SkScalar.h" |
| #include "include/core/SkShader.h" |
| #include "include/core/SkSize.h" |
| #include "include/core/SkString.h" |
| #include "include/core/SkTileMode.h" |
| #include "include/core/SkTypeface.h" |
| #include "include/utils/SkTextUtils.h" |
| #include "tools/ToolUtils.h" |
| #include <stdint.h> |
| #include <string.h> |
| |
| namespace skiagm { |
| |
| class Xfermodes2GM : public GM { |
| public: |
| Xfermodes2GM(bool grayscale) : fGrayscale(grayscale) {} |
| |
| protected: |
| SkString onShortName() override { |
| return fGrayscale ? SkString("xfermodes2_gray") : SkString("xfermodes2"); |
| } |
| |
| SkISize onISize() override { |
| return SkISize::Make(455, 475); |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| canvas->translate(SkIntToScalar(10), SkIntToScalar(20)); |
| |
| const SkScalar w = SkIntToScalar(kSize); |
| const SkScalar h = SkIntToScalar(kSize); |
| |
| SkFont font(ToolUtils::create_portable_typeface()); |
| |
| const int W = 6; |
| |
| SkScalar x = 0, y = 0; |
| for (size_t m = 0; m < kSkBlendModeCount; m++) { |
| SkBlendMode mode = static_cast<SkBlendMode>(m); |
| |
| canvas->save(); |
| |
| canvas->translate(x, y); |
| SkPaint p; |
| p.setAntiAlias(false); |
| p.setStyle(SkPaint::kFill_Style); |
| p.setShader(fBG); |
| SkRect r = SkRect::MakeWH(w, h); |
| canvas->drawRect(r, p); |
| |
| canvas->saveLayer(&r, nullptr); |
| |
| p.setShader(fDst); |
| canvas->drawRect(r, p); |
| p.setShader(fSrc); |
| p.setBlendMode(mode); |
| canvas->drawRect(r, p); |
| |
| canvas->restore(); |
| |
| r.inset(-SK_ScalarHalf, -SK_ScalarHalf); |
| p.setStyle(SkPaint::kStroke_Style); |
| p.setShader(nullptr); |
| p.setBlendMode(SkBlendMode::kSrcOver); |
| canvas->drawRect(r, p); |
| |
| canvas->restore(); |
| |
| #if 1 |
| SkTextUtils::DrawString(canvas, SkBlendMode_Name(mode), x + w/2, y - font.getSize()/2, font, SkPaint(), |
| SkTextUtils::kCenter_Align); |
| #endif |
| x += w + SkIntToScalar(10); |
| if ((m % W) == W - 1) { |
| x = 0; |
| y += h + SkIntToScalar(30); |
| } |
| } |
| } |
| |
| private: |
| void onOnceBeforeDraw() override { |
| const uint32_t kCheckData[] = { |
| SkPackARGB32(0xFF, 0x42, 0x41, 0x42), |
| SkPackARGB32(0xFF, 0xD6, 0xD3, 0xD6), |
| SkPackARGB32(0xFF, 0xD6, 0xD3, 0xD6), |
| SkPackARGB32(0xFF, 0x42, 0x41, 0x42) |
| }; |
| SkBitmap bg; |
| bg.allocN32Pixels(2, 2, true); |
| memcpy(bg.getPixels(), kCheckData, sizeof(kCheckData)); |
| |
| SkMatrix lm; |
| lm.setScale(SkIntToScalar(16), SkIntToScalar(16)); |
| fBG = bg.makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat, SkSamplingOptions(), lm); |
| |
| SkBitmap srcBmp; |
| srcBmp.allocN32Pixels(kSize, kSize); |
| SkPMColor* pixels = reinterpret_cast<SkPMColor*>(srcBmp.getPixels()); |
| |
| for (int y = 0; y < kSize; ++y) { |
| int c = y * (1 << kShift); |
| SkPMColor rowColor = fGrayscale ? SkPackARGB32(c, c, c, c) : SkPackARGB32(c, c, 0, c/2); |
| for (int x = 0; x < kSize; ++x) { |
| pixels[kSize * y + x] = rowColor; |
| } |
| } |
| fSrc = srcBmp.makeShader(SkSamplingOptions()); |
| SkBitmap dstBmp; |
| dstBmp.allocN32Pixels(kSize, kSize); |
| pixels = reinterpret_cast<SkPMColor*>(dstBmp.getPixels()); |
| |
| for (int x = 0; x < kSize; ++x) { |
| int c = x * (1 << kShift); |
| SkPMColor colColor = fGrayscale ? SkPackARGB32(c, c, c, c) : SkPackARGB32(c, 0, c, c/2); |
| for (int y = 0; y < kSize; ++y) { |
| pixels[kSize * y + x] = colColor; |
| } |
| } |
| fDst = dstBmp.makeShader(SkSamplingOptions()); |
| } |
| |
| enum { |
| kShift = 2, |
| kSize = 256 >> kShift, |
| }; |
| |
| bool fGrayscale; |
| sk_sp<SkShader> fBG; |
| sk_sp<SkShader> fSrc; |
| sk_sp<SkShader> fDst; |
| |
| using INHERITED = GM; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_GM( return new Xfermodes2GM(false); ) |
| DEF_GM( return new Xfermodes2GM(true); ) |
| |
| } // namespace skiagm |