| |
| /* |
| * Copyright 2011 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" |
| |
| namespace skiagm { |
| |
| static void make_bitmaps(int w, int h, SkBitmap* src, SkBitmap* dst) { |
| src->setConfig(SkBitmap::kARGB_8888_Config, w, h); |
| src->allocPixels(); |
| src->eraseColor(SK_ColorTRANSPARENT); |
| |
| SkPaint p; |
| p.setAntiAlias(true); |
| |
| SkRect r; |
| SkScalar ww = SkIntToScalar(w); |
| SkScalar hh = SkIntToScalar(h); |
| |
| { |
| SkCanvas c(*src); |
| p.setColor(0xFFFFCC44); |
| r.set(0, 0, ww*3/4, hh*3/4); |
| c.drawOval(r, p); |
| } |
| |
| dst->setConfig(SkBitmap::kARGB_8888_Config, w, h); |
| dst->allocPixels(); |
| dst->eraseColor(SK_ColorTRANSPARENT); |
| |
| { |
| SkCanvas c(*dst); |
| p.setColor(0xFF66AAFF); |
| r.set(ww/3, hh/3, ww*19/20, hh*19/20); |
| c.drawRect(r, p); |
| } |
| } |
| |
| static uint16_t gData[] = { 0xFFFF, 0xCCCF, 0xCCCF, 0xFFFF }; |
| |
| class XfermodesGM : public GM { |
| SkBitmap fBG; |
| SkBitmap fSrcB, fDstB; |
| |
| void draw_mode(SkCanvas* canvas, SkXfermode* mode, int alpha, |
| SkScalar x, SkScalar y) { |
| SkPaint p; |
| |
| canvas->drawBitmap(fSrcB, x, y, &p); |
| p.setAlpha(alpha); |
| p.setXfermode(mode); |
| canvas->drawBitmap(fDstB, x, y, &p); |
| } |
| |
| virtual void onOnceBeforeDraw() SK_OVERRIDE { |
| fBG.setConfig(SkBitmap::kARGB_4444_Config, 2, 2, 4); |
| fBG.setPixels(gData); |
| fBG.setIsOpaque(true); |
| |
| make_bitmaps(W, H, &fSrcB, &fDstB); |
| } |
| |
| public: |
| const static int W = 64; |
| const static int H = 64; |
| XfermodesGM() {} |
| |
| protected: |
| virtual SkString onShortName() { |
| return SkString("xfermodes"); |
| } |
| |
| virtual SkISize onISize() { |
| return make_isize(790, 640); |
| } |
| |
| virtual void onDraw(SkCanvas* canvas) { |
| canvas->translate(SkIntToScalar(10), SkIntToScalar(20)); |
| |
| const struct { |
| SkXfermode::Mode fMode; |
| const char* fLabel; |
| } gModes[] = { |
| { SkXfermode::kClear_Mode, "Clear" }, |
| { SkXfermode::kSrc_Mode, "Src" }, |
| { SkXfermode::kDst_Mode, "Dst" }, |
| { SkXfermode::kSrcOver_Mode, "SrcOver" }, |
| { SkXfermode::kDstOver_Mode, "DstOver" }, |
| { SkXfermode::kSrcIn_Mode, "SrcIn" }, |
| { SkXfermode::kDstIn_Mode, "DstIn" }, |
| { SkXfermode::kSrcOut_Mode, "SrcOut" }, |
| { SkXfermode::kDstOut_Mode, "DstOut" }, |
| { SkXfermode::kSrcATop_Mode, "SrcATop" }, |
| { SkXfermode::kDstATop_Mode, "DstATop" }, |
| { SkXfermode::kXor_Mode, "Xor" }, |
| |
| { SkXfermode::kPlus_Mode, "Plus" }, |
| { SkXfermode::kModulate_Mode, "Modulate" }, |
| { SkXfermode::kScreen_Mode, "Screen" }, |
| { SkXfermode::kOverlay_Mode, "Overlay" }, |
| { SkXfermode::kDarken_Mode, "Darken" }, |
| { SkXfermode::kLighten_Mode, "Lighten" }, |
| { SkXfermode::kColorDodge_Mode, "ColorDodge" }, |
| { SkXfermode::kColorBurn_Mode, "ColorBurn" }, |
| { SkXfermode::kHardLight_Mode, "HardLight" }, |
| { SkXfermode::kSoftLight_Mode, "SoftLight" }, |
| { SkXfermode::kDifference_Mode, "Difference" }, |
| { SkXfermode::kExclusion_Mode, "Exclusion" }, |
| }; |
| |
| const SkScalar w = SkIntToScalar(W); |
| const SkScalar h = SkIntToScalar(H); |
| SkShader* s = SkShader::CreateBitmapShader(fBG, |
| SkShader::kRepeat_TileMode, |
| SkShader::kRepeat_TileMode); |
| SkMatrix m; |
| m.setScale(SkIntToScalar(6), SkIntToScalar(6)); |
| s->setLocalMatrix(m); |
| |
| SkPaint labelP; |
| labelP.setAntiAlias(true); |
| labelP.setTextAlign(SkPaint::kCenter_Align); |
| |
| const int W = 5; |
| |
| SkScalar x0 = 0; |
| for (int twice = 0; twice < 2; twice++) { |
| SkScalar x = x0, y = 0; |
| for (size_t i = 0; i < SK_ARRAY_COUNT(gModes); i++) { |
| SkXfermode* mode = SkXfermode::Create(gModes[i].fMode); |
| SkAutoUnref aur(mode); |
| SkRect r; |
| r.set(x, y, x+w, y+h); |
| |
| SkPaint p; |
| p.setStyle(SkPaint::kFill_Style); |
| p.setShader(s); |
| canvas->drawRect(r, p); |
| |
| canvas->saveLayer(&r, NULL, SkCanvas::kARGB_ClipLayer_SaveFlag); |
| draw_mode(canvas, mode, twice ? 0x88 : 0xFF, r.fLeft, r.fTop); |
| canvas->restore(); |
| |
| r.inset(-SK_ScalarHalf, -SK_ScalarHalf); |
| p.setStyle(SkPaint::kStroke_Style); |
| p.setShader(NULL); |
| canvas->drawRect(r, p); |
| |
| #if 1 |
| canvas->drawText(gModes[i].fLabel, strlen(gModes[i].fLabel), |
| x + w/2, y - labelP.getTextSize()/2, labelP); |
| #endif |
| x += w + SkIntToScalar(10); |
| if ((i % W) == W - 1) { |
| x = x0; |
| y += h + SkIntToScalar(30); |
| } |
| } |
| x0 += SkIntToScalar(400); |
| } |
| s->unref(); |
| } |
| |
| private: |
| typedef GM INHERITED; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| static GM* MyFactory(void*) { return new XfermodesGM; } |
| static GMRegistry reg(MyFactory); |
| |
| } |