| |
| /* |
| * 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); |
| |
