/* * 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/gm.h" #include "include/core/SkBitmap.h" #include "include/core/SkBlendMode.h" #include "include/core/SkCanvas.h" #include "include/core/SkColor.h" #include "include/core/SkFont.h" #include "include/core/SkImageInfo.h" #include "include/core/SkMatrix.h" #include "include/core/SkPaint.h" #include "include/core/SkRect.h" #include "include/core/SkScalar.h" #include "include/core/SkShader.h" #include "include/core/SkSize.h" #include "include/core/SkString.h" #include "include/core/SkTileMode.h" #include "include/core/SkTypeface.h" #include "include/core/SkTypes.h" #include "include/utils/SkTextUtils.h" #include "tools/ToolUtils.h" enum SrcType { //! A WxH image with a rectangle in the lower right. kRectangleImage_SrcType = 0x01, //! kRectangleImage_SrcType with an alpha of 34.5%. kRectangleImageWithAlpha_SrcType = 0x02, //! kRectnagleImageWithAlpha_SrcType scaled down by half. kSmallRectangleImageWithAlpha_SrcType = 0x04, //! kRectangleImage_SrcType drawn directly instead in an image. kRectangle_SrcType = 0x08, //! Two rectangles, first on the right half, second on the bottom half. kQuarterClear_SrcType = 0x10, //! kQuarterClear_SrcType in a layer. kQuarterClearInLayer_SrcType = 0x20, //! A W/2xH/2 transparent image. kSmallTransparentImage_SrcType = 0x40, //! kRectangleImage_SrcType drawn directly with a mask. kRectangleWithMask_SrcType = 0x80, kAll_SrcType = 0xFF, //!< All the source types. kBasic_SrcType = 0x03, //!< Just basic source types. }; const struct { SkBlendMode fMode; int fSourceTypeMask; // The source types to use this // mode with. See draw_mode for // an explanation of each type. // PDF has to play some tricks // to support the base modes, // test those more extensively. } gModes[] = { { SkBlendMode::kClear, kAll_SrcType }, { SkBlendMode::kSrc, kAll_SrcType }, { SkBlendMode::kDst, kAll_SrcType }, { SkBlendMode::kSrcOver, kAll_SrcType }, { SkBlendMode::kDstOver, kAll_SrcType }, { SkBlendMode::kSrcIn, kAll_SrcType }, { SkBlendMode::kDstIn, kAll_SrcType }, { SkBlendMode::kSrcOut, kAll_SrcType }, { SkBlendMode::kDstOut, kAll_SrcType }, { SkBlendMode::kSrcATop, kAll_SrcType }, { SkBlendMode::kDstATop, kAll_SrcType }, { SkBlendMode::kXor, kBasic_SrcType }, { SkBlendMode::kPlus, kBasic_SrcType }, { SkBlendMode::kModulate, kAll_SrcType }, { SkBlendMode::kScreen, kBasic_SrcType }, { SkBlendMode::kOverlay, kBasic_SrcType }, { SkBlendMode::kDarken, kBasic_SrcType }, { SkBlendMode::kLighten, kBasic_SrcType }, { SkBlendMode::kColorDodge, kBasic_SrcType }, { SkBlendMode::kColorBurn, kBasic_SrcType }, { SkBlendMode::kHardLight, kBasic_SrcType }, { SkBlendMode::kSoftLight, kBasic_SrcType }, { SkBlendMode::kDifference, kBasic_SrcType }, { SkBlendMode::kExclusion, kBasic_SrcType }, { SkBlendMode::kMultiply, kAll_SrcType }, { SkBlendMode::kHue, kBasic_SrcType }, { SkBlendMode::kSaturation, kBasic_SrcType }, { SkBlendMode::kColor, kBasic_SrcType }, { SkBlendMode::kLuminosity, kBasic_SrcType }, }; static void make_bitmaps(int w, int h, SkBitmap* src, SkBitmap* dst, SkBitmap* transparent) { src->allocN32Pixels(w, h); src->eraseColor(SK_ColorTRANSPARENT); SkPaint p; p.setAntiAlias(true); SkRect r; SkScalar ww = SkIntToScalar(w); SkScalar hh = SkIntToScalar(h); { SkCanvas c(*src); p.setColor(ToolUtils::color_to_565(0xFFFFCC44)); r.setWH(ww*3/4, hh*3/4); c.drawOval(r, p); } dst->allocN32Pixels(w, h); dst->eraseColor(SK_ColorTRANSPARENT); { SkCanvas c(*dst); p.setColor(ToolUtils::color_to_565(0xFF66AAFF)); r.setLTRB(ww/3, hh/3, ww*19/20, hh*19/20); c.drawRect(r, p); } transparent->allocN32Pixels(w, h); transparent->eraseColor(SK_ColorTRANSPARENT); } static uint16_t gData[] = { 0xFFFF, 0xCCCF, 0xCCCF, 0xFFFF }; class XfermodesGM : public skiagm::GM { SkBitmap fBG; SkBitmap fSrcB, fDstB, fTransparent; /* The srcType argument indicates what to draw for the source part. Skia * uses the implied shape of the drawing command and these modes * demonstrate that. */ void draw_mode(SkCanvas* canvas, SkBlendMode mode, SrcType srcType, SkScalar x, SkScalar y) { SkPaint p; SkSamplingOptions sampling; SkMatrix m; bool restoreNeeded = false; m.setTranslate(x, y); canvas->drawImage(fSrcB.asImage(), x, y, sampling, &p); p.setBlendMode(mode); switch (srcType) { case kSmallTransparentImage_SrcType: { m.postScale(SK_ScalarHalf, SK_ScalarHalf, x, y); SkAutoCanvasRestore acr(canvas, true); canvas->concat(m); canvas->drawImage(fTransparent.asImage(), 0, 0, sampling, &p); break; } case kQuarterClearInLayer_SrcType: { SkRect bounds = SkRect::MakeXYWH(x, y, SkIntToScalar(W), SkIntToScalar(H)); canvas->saveLayer(&bounds, &p); restoreNeeded = true; p.setBlendMode(SkBlendMode::kSrcOver); [[fallthrough]]; } case kQuarterClear_SrcType: { SkScalar halfW = SkIntToScalar(W) / 2; SkScalar halfH = SkIntToScalar(H) / 2; p.setColor(ToolUtils::color_to_565(0xFF66AAFF)); SkRect r = SkRect::MakeXYWH(x + halfW, y, halfW, SkIntToScalar(H)); canvas->drawRect(r, p); p.setColor(ToolUtils::color_to_565(0xFFAA66FF)); r = SkRect::MakeXYWH(x, y + halfH, SkIntToScalar(W), halfH); canvas->drawRect(r, p); break; } case kRectangleWithMask_SrcType: { canvas->save(); restoreNeeded = true; SkScalar w = SkIntToScalar(W); SkScalar h = SkIntToScalar(H); SkRect r = SkRect::MakeXYWH(x, y + h / 4, w, h * 23 / 60); canvas->clipRect(r); [[fallthrough]]; } case kRectangle_SrcType: { SkScalar w = SkIntToScalar(W); SkScalar h = SkIntToScalar(H); SkRect r = SkRect::MakeXYWH(x + w / 3, y + h / 3, w * 37 / 60, h * 37 / 60); p.setColor(ToolUtils::color_to_565(0xFF66AAFF)); canvas->drawRect(r, p); break; } case kSmallRectangleImageWithAlpha_SrcType: m.postScale(SK_ScalarHalf, SK_ScalarHalf, x, y); [[fallthrough]]; case kRectangleImageWithAlpha_SrcType: p.setAlpha(0x88); [[fallthrough]]; case kRectangleImage_SrcType: { SkAutoCanvasRestore acr(canvas, true); canvas->concat(m); canvas->drawImage(fDstB.asImage(), 0, 0, sampling, &p); break; } default: break; } if (restoreNeeded) { canvas->restore(); } } void onOnceBeforeDraw() override { fBG.installPixels(SkImageInfo::Make(2, 2, kARGB_4444_SkColorType, kOpaque_SkAlphaType), gData, 4); make_bitmaps(W, H, &fSrcB, &fDstB, &fTransparent); } public: const static int W = 64; const static int H = 64; XfermodesGM() {} protected: SkString onShortName() override { return SkString("xfermodes"); } SkISize onISize() override { return SkISize::Make(1990, 570); } void onDraw(SkCanvas* canvas) override { canvas->translate(SkIntToScalar(10), SkIntToScalar(20)); const SkScalar w = SkIntToScalar(W); const SkScalar h = SkIntToScalar(H); SkMatrix m; m.setScale(SkIntToScalar(6), SkIntToScalar(6)); auto s = fBG.makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat, SkSamplingOptions(), m); SkPaint labelP; labelP.setAntiAlias(true); SkFont font(ToolUtils::create_portable_typeface()); const int kWrap = 5; SkScalar x0 = 0; SkScalar y0 = 0; for (int sourceType = 1; sourceType & kAll_SrcType; sourceType <<= 1) { SkScalar x = x0, y = y0; for (size_t i = 0; i < std::size(gModes); i++) { if ((gModes[i].fSourceTypeMask & sourceType) == 0) { continue; } SkRect r{ x, y, x+w, y+h }; SkPaint p; p.setStyle(SkPaint::kFill_Style); p.setShader(s); canvas->drawRect(r, p); canvas->saveLayer(&r, nullptr); draw_mode(canvas, gModes[i].fMode, static_cast<SrcType>(sourceType), r.fLeft, r.fTop); canvas->restore(); r.inset(-SK_ScalarHalf, -SK_ScalarHalf); p.setStyle(SkPaint::kStroke_Style); p.setShader(nullptr); canvas->drawRect(r, p); #if 1 const char* label = SkBlendMode_Name(gModes[i].fMode); SkTextUtils::DrawString(canvas, label, x + w/2, y - font.getSize()/2, font, labelP, SkTextUtils::kCenter_Align); #endif x += w + SkIntToScalar(10); if ((i % kWrap) == kWrap - 1) { x = x0; y += h + SkIntToScalar(30); } } if (y < 320) { if (x > x0) { y += h + SkIntToScalar(30); } y0 = y; } else { x0 += SkIntToScalar(400); y0 = 0; } } } private: using INHERITED = GM; }; DEF_GM( return new XfermodesGM; )