| /* |
| * 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; ) |