| #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(0); |
| |
| SkCanvas c(*src); |
| SkPaint p; |
| SkRect r; |
| SkScalar ww = SkIntToScalar(w); |
| SkScalar hh = SkIntToScalar(h); |
| |
| p.setAntiAlias(true); |
| 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(0); |
| c.setBitmapDevice(*dst); |
| |
| p.setColor(0xFF66AAFF); |
| r.set(ww/3, hh/3, ww*19/20, hh*19/20); |
| c.drawRect(r, p); |
| } |
| |
| static uint16_t gBG[] = { 0xFFFF, 0xCCCF, 0xCCCF, 0xFFFF }; |
| |
| class XfermodesGM : public GM { |
| SkBitmap fBitmap; |
| SkBitmap fBG; |
| SkBitmap fSrcB, fDstB; |
| |
| void draw_mode(SkCanvas* canvas, SkXfermode* mode, int alpha) { |
| SkPaint p; |
| |
| canvas->drawBitmap(fSrcB, 0, 0, &p); |
| p.setAlpha(alpha); |
| p.setXfermode(mode); |
| canvas->drawBitmap(fDstB, 0, 0, &p); |
| } |
| |
| public: |
| XfermodesGM() { |
| const int W = 64; |
| const int H = 64; |
| |
| fBitmap.setConfig(SkBitmap::kARGB_8888_Config, W, H); |
| fBitmap.allocPixels(); |
| |
| fBG.setConfig(SkBitmap::kARGB_4444_Config, 2, 2, 4); |
| fBG.setPixels(gBG); |
| fBG.setIsOpaque(true); |
| |
| make_bitmaps(W, H, &fSrcB, &fDstB); |
| } |
| |
| protected: |
| SkString onShortName() { |
| return SkString("xfermodes"); |
| } |
| |
| SkISize onISize() { return make_isize(640, 380); } |
| |
| void drawBG(SkCanvas* canvas) { |
| canvas->drawColor(SK_ColorWHITE); |
| return; |
| SkShader* s = SkShader::CreateBitmapShader(fBG, |
| SkShader::kRepeat_TileMode, |
| SkShader::kRepeat_TileMode); |
| SkPaint p; |
| SkMatrix m; |
| |
| p.setShader(s)->unref(); |
| m.setScale(SkIntToScalar(8), SkIntToScalar(8)); |
| s->setLocalMatrix(m); |
| canvas->drawPaint(p); |
| } |
| |
| virtual void onDraw(SkCanvas* canvas) { |
| this->drawBG(canvas); |
| |
| const struct { |
| SkPorterDuff::Mode fMode; |
| const char* fLabel; |
| } gModes[] = { |
| { SkPorterDuff::kClear_Mode, "Clear" }, |
| { SkPorterDuff::kSrc_Mode, "Src" }, |
| { SkPorterDuff::kDst_Mode, "Dst" }, |
| { SkPorterDuff::kSrcOver_Mode, "SrcOver" }, |
| { SkPorterDuff::kDstOver_Mode, "DstOver" }, |
| { SkPorterDuff::kSrcIn_Mode, "SrcIn" }, |
| { SkPorterDuff::kDstIn_Mode, "DstIn" }, |
| { SkPorterDuff::kSrcOut_Mode, "SrcOut" }, |
| { SkPorterDuff::kDstOut_Mode, "DstOut" }, |
| { SkPorterDuff::kSrcATop_Mode, "SrcATop" }, |
| { SkPorterDuff::kDstATop_Mode, "DstATop" }, |
| { SkPorterDuff::kXor_Mode, "Xor" }, |
| { SkPorterDuff::kDarken_Mode, "Darken" }, |
| { SkPorterDuff::kLighten_Mode, "Lighten" }, |
| { SkPorterDuff::kMultiply_Mode, "Multiply" }, |
| { SkPorterDuff::kScreen_Mode, "Screen" } |
| }; |
| |
| canvas->translate(SkIntToScalar(10), SkIntToScalar(20)); |
| |
| SkCanvas c(fBitmap); |
| const SkScalar w = SkIntToScalar(fBitmap.width()); |
| const SkScalar h = SkIntToScalar(fBitmap.height()); |
| 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); |
| |
| 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 = SkPorterDuff::CreateXfermode(gModes[i].fMode); |
| |
| fBitmap.eraseColor(0); |
| draw_mode(&c, mode, twice ? 0x88 : 0xFF); |
| mode->safeUnref(); |
| |
| SkPaint p; |
| SkRect r; |
| r.set(x, y, x+w, y+h); |
| r.inset(-SK_ScalarHalf, -SK_ScalarHalf); |
| p.setStyle(SkPaint::kStroke_Style); |
| canvas->drawRect(r, p); |
| p.setStyle(SkPaint::kFill_Style); |
| p.setShader(s); |
| r.inset(SK_ScalarHalf, SK_ScalarHalf); |
| canvas->drawRect(r, p); |
| |
| canvas->drawBitmap(fBitmap, x, y, NULL); |
| |
| #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 & 3) == 3) { |
| x = x0; |
| y += h + SkIntToScalar(30); |
| } |
| } |
| x0 += SkIntToScalar(330); |
| } |
| s->unref(); |
| } |
| |
| private: |
| typedef GM INHERITED; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| static GM* MyFactory(void*) { return new XfermodesGM; } |
| static GMRegistry reg(MyFactory); |
| |
| } |
| |