/* * 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 "SampleCode.h" #include "SkView.h" #include "SkCanvas.h" #include "Sk64.h" #include "SkCornerPathEffect.h" #include "SkGradientShader.h" #include "SkGraphics.h" #include "SkImageDecoder.h" #include "SkKernel33MaskFilter.h" #include "SkPath.h" #include "SkRandom.h" #include "SkRegion.h" #include "SkShader.h" #include "SkUtils.h" #include "SkColorPriv.h" #include "SkColorFilter.h" #include "SkTime.h" #include "SkTypeface.h" #include "SkXfermode.h" #include "SkStream.h" #include "SkXMLParser.h" #include "SkColorPriv.h" #include "SkImageDecoder.h" static void setNamedTypeface(SkPaint* paint, const char name[]) { SkTypeface* face = SkTypeface::CreateFromName(name, SkTypeface::kNormal); paint->setTypeface(face); SkSafeUnref(face); } #if 0 static int newscale(U8CPU a, U8CPU b, int shift) { unsigned prod = a * b + (1 << (shift - 1)); return (prod + (prod >> shift)) >> shift; } static void test_srcover565(SkCanvas* canvas) { const int width = 32; SkBitmap bm1, bm2, bm3; bm1.setConfig(SkBitmap::kRGB_565_Config, width, 256); bm1.allocPixels(NULL); bm2.setConfig(SkBitmap::kRGB_565_Config, width, 256); bm2.allocPixels(NULL); bm3.setConfig(SkBitmap::kRGB_565_Config, width, 256); bm3.allocPixels(NULL); int rgb = 0x18; int r = rgb >> 3; int g = rgb >> 2; uint16_t dst = SkPackRGB16(r, g, r); for (int alpha = 0; alpha <= 255; alpha++) { SkPMColor pm = SkPreMultiplyARGB(alpha, rgb, rgb, rgb); uint16_t newdst = SkSrcOver32To16(pm, dst); sk_memset16(bm1.getAddr16(0, alpha), newdst, bm1.width()); int ia = 255 - alpha; int iscale = SkAlpha255To256(ia); int dr = (SkGetPackedR32(pm) + (r * iscale >> 5)) >> 3; int dg = (SkGetPackedG32(pm) + (g * iscale >> 6)) >> 2; sk_memset16(bm2.getAddr16(0, alpha), SkPackRGB16(dr, dg, dr), bm2.width()); int dr2 = (SkMulDiv255Round(alpha, rgb) + newscale(r, ia, 5)) >> 3; int dg2 = (SkMulDiv255Round(alpha, rgb) + newscale(g, ia, 6)) >> 2; sk_memset16(bm3.getAddr16(0, alpha), SkPackRGB16(dr2, dg2, dr2), bm3.width()); // if (mr != dr || mg != dg) { // SkDebugf("[%d] macro [%d %d] inline [%d %d] new [%d %d]\n", alpha, mr, mg, dr, dg, dr2, dg2); } } SkScalar dx = SkIntToScalar(width+4); canvas->drawBitmap(bm1, 0, 0, NULL); canvas->translate(dx, 0); canvas->drawBitmap(bm2, 0, 0, NULL); canvas->translate(dx, 0); canvas->drawBitmap(bm3, 0, 0, NULL); canvas->translate(dx, 0); SkRect rect = { 0, 0, SkIntToScalar(bm1.width()), SkIntToScalar(bm1.height()) }; SkPaint p; p.setARGB(0xFF, rgb, rgb, rgb); canvas->drawRect(rect, p); } #endif 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 XfermodesView : public SampleView { 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); } public: const static int W = 64; const static int H = 64; XfermodesView() { const int W = 64; const int H = 64; fBG.setConfig(SkBitmap::kARGB_4444_Config, 2, 2, 4); fBG.setPixels(gBG); fBG.setIsOpaque(true); make_bitmaps(W, H, &fSrcB, &fDstB); } protected: // overrides from SkEventSink virtual bool onQuery(SkEvent* evt) { if (SampleCode::TitleQ(*evt)) { SampleCode::TitleR(evt, "Xfermodes"); return true; } return this->INHERITED::onQuery(evt); } virtual void onDrawContent(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::kMultiply_Mode, "Multiply" }, { 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.setLCDRenderText(true); labelP.setTextAlign(SkPaint::kCenter_Align); setNamedTypeface(&labelP, "Menlo Regular"); // labelP.setTextSize(SkIntToScalar(11)); 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); // canvas->save(); 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 SampleView INHERITED; }; ////////////////////////////////////////////////////////////////////////////// static SkView* MyFactory() { return new XfermodesView; } static SkViewRegister reg(MyFactory);