| |
| /* |
| * 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.h" |
| #include "SkBitmap.h" |
| #include "SkShader.h" |
| #include "SkXfermode.h" |
| #include "SkColorPriv.h" |
| |
| namespace skiagm { |
| |
| class Xfermodes2GM : public GM { |
| public: |
| Xfermodes2GM() {} |
| |
| protected: |
| virtual SkString onShortName() SK_OVERRIDE { |
| return SkString("xfermodes2"); |
| } |
| |
| virtual SkISize onISize() SK_OVERRIDE { |
| return make_isize(455, 475); |
| } |
| |
| virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { |
| canvas->translate(SkIntToScalar(10), SkIntToScalar(20)); |
| |
| const SkScalar w = SkIntToScalar(kSize); |
| const SkScalar h = SkIntToScalar(kSize); |
| |
| SkPaint labelP; |
| labelP.setAntiAlias(true); |
| labelP.setTextAlign(SkPaint::kCenter_Align); |
| |
| const int W = 6; |
| |
| SkScalar x = 0, y = 0; |
| for (size_t m = 0; m <= SkXfermode::kLastMode; m++) { |
| SkXfermode::Mode mode = static_cast<SkXfermode::Mode>(m); |
| SkXfermode* xm = SkXfermode::Create(mode); |
| SkAutoUnref aur(xm); |
| |
| 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, NULL, SkCanvas::kARGB_ClipLayer_SaveFlag); |
| |
| p.setShader(fDst); |
| canvas->drawRect(r, p); |
| p.setShader(fSrc); |
| p.setXfermode(xm); |
| canvas->drawRect(r, p); |
| |
| canvas->restore(); |
| |
| r.inset(-SK_ScalarHalf, -SK_ScalarHalf); |
| p.setStyle(SkPaint::kStroke_Style); |
| p.setShader(NULL); |
| p.setXfermode(NULL); |
| canvas->drawRect(r, p); |
| |
| canvas->restore(); |
| |
| #if 1 |
| canvas->drawText(SkXfermode::ModeName(mode), strlen(SkXfermode::ModeName(mode)), |
| x + w/2, y - labelP.getTextSize()/2, labelP); |
| #endif |
| x += w + SkIntToScalar(10); |
| if ((m % W) == W - 1) { |
| x = 0; |
| y += h + SkIntToScalar(30); |
| } |
| } |
| } |
| |
| private: |
| virtual void onOnceBeforeDraw() SK_OVERRIDE { |
| static const uint32_t kCheckData[] = { |
| SkPackARGB32(0xFF, 0x40, 0x40, 0x40), |
| SkPackARGB32(0xFF, 0xD0, 0xD0, 0xD0), |
| SkPackARGB32(0xFF, 0xD0, 0xD0, 0xD0), |
| SkPackARGB32(0xFF, 0x40, 0x40, 0x40) |
| }; |
| SkBitmap bg; |
| bg.setConfig(SkBitmap::kARGB_8888_Config, 2, 2, 0, kOpaque_SkAlphaType); |
| bg.allocPixels(); |
| SkAutoLockPixels bgAlp(bg); |
| memcpy(bg.getPixels(), kCheckData, sizeof(kCheckData)); |
| |
| fBG.reset(SkShader::CreateBitmapShader(bg, |
| SkShader::kRepeat_TileMode, |
| SkShader::kRepeat_TileMode)); |
| SkMatrix lm; |
| lm.setScale(SkIntToScalar(16), SkIntToScalar(16)); |
| fBG->setLocalMatrix(lm); |
| |
| SkBitmap dstBmp; |
| dstBmp.setConfig(SkBitmap::kARGB_8888_Config, kSize, kSize); |
| dstBmp.allocPixels(); |
| SkAutoLockPixels dstAlp(dstBmp); |
| SkPMColor* pixels = reinterpret_cast<SkPMColor*>(dstBmp.getPixels()); |
| |
| for (int y = 0; y < kSize; ++y) { |
| int c = y * (1 << kShift); |
| SkPMColor rowColor = SkPackARGB32(c, c, 0, c/2); |
| for (int x = 0; x < kSize; ++x) { |
| pixels[kSize * y + x] = rowColor; |
| } |
| } |
| fSrc.reset(SkShader::CreateBitmapShader(dstBmp, |
| SkShader::kClamp_TileMode, |
| SkShader::kClamp_TileMode)); |
| SkBitmap srcBmp; |
| srcBmp.setConfig(SkBitmap::kARGB_8888_Config, kSize, kSize); |
| srcBmp.allocPixels(); |
| SkAutoLockPixels srcAlp(srcBmp); |
| pixels = reinterpret_cast<SkPMColor*>(srcBmp.getPixels()); |
| |
| for (int x = 0; x < kSize; ++x) { |
| int c = x * (1 << kShift); |
| SkPMColor colColor = SkPackARGB32(c, 0, c, c/2); |
| for (int y = 0; y < kSize; ++y) { |
| pixels[kSize * y + x] = colColor; |
| } |
| } |
| fDst.reset(SkShader::CreateBitmapShader(srcBmp, |
| SkShader::kClamp_TileMode, |
| SkShader::kClamp_TileMode)); |
| } |
| |
| enum { |
| kShift = 2, |
| kSize = 256 >> kShift, |
| }; |
| |
| SkAutoTUnref<SkShader> fBG; |
| SkAutoTUnref<SkShader> fSrc; |
| SkAutoTUnref<SkShader> fDst; |
| |
| typedef GM INHERITED; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| static GM* MyFactory(void*) { return new Xfermodes2GM; } |
| static GMRegistry reg(MyFactory); |
| |
| } |