| /* |
| * 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.h" |
| #include "SkBitmap.h" |
| #include "SkShader.h" |
| #include "SkXfermode.h" |
| #include "SkPM4f.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 { |
| SkXfermode::Mode fMode; |
| const char* fLabel; |
| 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[] = { |
| { SkXfermode::kClear_Mode, "Clear", kAll_SrcType }, |
| { SkXfermode::kSrc_Mode, "Src", kAll_SrcType }, |
| { SkXfermode::kDst_Mode, "Dst", kAll_SrcType }, |
| { SkXfermode::kSrcOver_Mode, "SrcOver", kAll_SrcType }, |
| { SkXfermode::kDstOver_Mode, "DstOver", kAll_SrcType }, |
| { SkXfermode::kSrcIn_Mode, "SrcIn", kAll_SrcType }, |
| { SkXfermode::kDstIn_Mode, "DstIn", kAll_SrcType }, |
| { SkXfermode::kSrcOut_Mode, "SrcOut", kAll_SrcType }, |
| { SkXfermode::kDstOut_Mode, "DstOut", kAll_SrcType }, |
| { SkXfermode::kSrcATop_Mode, "SrcATop", kAll_SrcType }, |
| { SkXfermode::kDstATop_Mode, "DstATop", kAll_SrcType }, |
| |
| { SkXfermode::kXor_Mode, "Xor", kBasic_SrcType }, |
| { SkXfermode::kPlus_Mode, "Plus", kBasic_SrcType }, |
| { SkXfermode::kModulate_Mode, "Modulate", kAll_SrcType }, |
| { SkXfermode::kScreen_Mode, "Screen", kBasic_SrcType }, |
| { SkXfermode::kOverlay_Mode, "Overlay", kBasic_SrcType }, |
| { SkXfermode::kDarken_Mode, "Darken", kBasic_SrcType }, |
| { SkXfermode::kLighten_Mode, "Lighten", kBasic_SrcType }, |
| { SkXfermode::kColorDodge_Mode, "ColorDodge", kBasic_SrcType }, |
| { SkXfermode::kColorBurn_Mode, "ColorBurn", kBasic_SrcType }, |
| { SkXfermode::kHardLight_Mode, "HardLight", kBasic_SrcType }, |
| { SkXfermode::kSoftLight_Mode, "SoftLight", kBasic_SrcType }, |
| { SkXfermode::kDifference_Mode, "Difference", kBasic_SrcType }, |
| { SkXfermode::kExclusion_Mode, "Exclusion", kBasic_SrcType }, |
| { SkXfermode::kMultiply_Mode, "Multiply", kAll_SrcType }, |
| { SkXfermode::kHue_Mode, "Hue", kBasic_SrcType }, |
| { SkXfermode::kSaturation_Mode, "Saturation", kBasic_SrcType }, |
| { SkXfermode::kColor_Mode, "Color", kBasic_SrcType }, |
| { SkXfermode::kLuminosity_Mode, "Luminosity", 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(sk_tool_utils::color_to_565(0xFFFFCC44)); |
| r.set(0, 0, ww*3/4, hh*3/4); |
| c.drawOval(r, p); |
| } |
| |
| dst->allocN32Pixels(w, h); |
| dst->eraseColor(SK_ColorTRANSPARENT); |
| |
| { |
| SkCanvas c(*dst); |
| p.setColor(sk_tool_utils::color_to_565(0xFF66AAFF)); |
| r.set(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, SkXfermode* mode, SrcType srcType, |
| SkScalar x, SkScalar y) { |
| SkPaint p; |
| SkMatrix m; |
| bool restoreNeeded = false; |
| m.setTranslate(x, y); |
| |
| canvas->drawBitmap(fSrcB, x, y, &p); |
| p.setXfermode(mode); |
| switch (srcType) { |
| case kSmallTransparentImage_SrcType: { |
| m.postScale(SK_ScalarHalf, SK_ScalarHalf, x, y); |
| |
| SkAutoCanvasRestore acr(canvas, true); |
| canvas->concat(m); |
| canvas->drawBitmap(fTransparent, 0, 0, &p); |
| break; |
| } |
| case kQuarterClearInLayer_SrcType: { |
| SkRect bounds = SkRect::MakeXYWH(x, y, SkIntToScalar(W), |
| SkIntToScalar(H)); |
| canvas->saveLayer(&bounds, &p); |
| restoreNeeded = true; |
| p.setXfermodeMode(SkXfermode::kSrcOver_Mode); |
| // Fall through. |
| } |
| case kQuarterClear_SrcType: { |
| SkScalar halfW = SkIntToScalar(W) / 2; |
| SkScalar halfH = SkIntToScalar(H) / 2; |
| p.setColor(sk_tool_utils::color_to_565(0xFF66AAFF)); |
| SkRect r = SkRect::MakeXYWH(x + halfW, y, halfW, |
| SkIntToScalar(H)); |
| canvas->drawRect(r, p); |
| p.setColor(sk_tool_utils::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); |
| // Fall through. |
| } |
| 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(sk_tool_utils::color_to_565(0xFF66AAFF)); |
| canvas->drawRect(r, p); |
| break; |
| } |
| case kSmallRectangleImageWithAlpha_SrcType: |
| m.postScale(SK_ScalarHalf, SK_ScalarHalf, x, y); |
| // Fall through. |
| case kRectangleImageWithAlpha_SrcType: |
| p.setAlpha(0x88); |
| // Fall through. |
| case kRectangleImage_SrcType: { |
| SkAutoCanvasRestore acr(canvas, true); |
| canvas->concat(m); |
| canvas->drawBitmap(fDstB, 0, 0, &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, 640); |
| } |
| |
| 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)); |
| SkShader* s = SkShader::CreateBitmapShader(fBG, |
| SkShader::kRepeat_TileMode, |
| SkShader::kRepeat_TileMode, |
| &m); |
| |
| SkPaint labelP; |
| labelP.setAntiAlias(true); |
| sk_tool_utils::set_portable_typeface(&labelP); |
| labelP.setTextAlign(SkPaint::kCenter_Align); |
| |
| const int W = 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 < SK_ARRAY_COUNT(gModes); i++) { |
| if ((gModes[i].fSourceTypeMask & sourceType) == 0) { |
| continue; |
| } |
| 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, nullptr); |
| draw_mode(canvas, mode, 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 |
| 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); |
| } |
| } |
| if (y < 320) { |
| if (x > x0) { |
| y += h + SkIntToScalar(30); |
| } |
| y0 = y; |
| } else { |
| x0 += SkIntToScalar(400); |
| y0 = 0; |
| } |
| } |
| s->unref(); |
| } |
| |
| private: |
| typedef GM INHERITED; |
| }; |
| DEF_GM( return new XfermodesGM; ) |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| #include "SkNx.h" |
| |
| static SkPMColor apply_proc(SkPMColor src, SkPMColor dst, SkXfermodeProc4f proc, float src_alpha) { |
| SkPM4f src4 = SkPM4f::FromPMColor(src); |
| for (int i = 0; i < 4; ++i) { |
| src4.fVec[i] *= src_alpha; |
| } |
| SkPM4f dst4 = SkPM4f::FromPMColor(dst); |
| SkPM4f res4 = proc(src4, dst4); |
| SkPMColor res; |
| SkNx_cast<uint8_t>(Sk4f::Load(res4.fVec) * Sk4f(255) + Sk4f(0.5f)).store(&res); |
| return res; |
| } |
| |
| static bool apply_mode(const SkPixmap& res, const SkPixmap& src, const SkPixmap& dst, |
| SkXfermode* xfer, float src_alpha) { |
| SkXfermode::Mode mode; |
| if (!xfer) { |
| mode = SkXfermode::kSrcOver_Mode; |
| } else if (!xfer->asMode(&mode)) { |
| return false; |
| } |
| SkXfermodeProc4f proc = SkXfermode::GetProc4f(mode); |
| if (!proc) { |
| return false; |
| } |
| |
| for (int y = 0; y < res.height(); ++y) { |
| for (int x = 0; x < res.width(); ++x) { |
| *res.writable_addr32(x, y) = apply_proc(*src.addr32(x, y), *dst.addr32(x, y), |
| proc, src_alpha); |
| } |
| } |
| return true; |
| } |
| |
| void draw_mode(const SkBitmap& srcB, const SkBitmap& dstB, |
| SkCanvas* canvas, SkXfermode* mode, SkScalar x, SkScalar y, float src_alpha) { |
| SkBitmap resB; |
| resB.allocN32Pixels(64, 64); |
| |
| SkPixmap srcPM, dstPM, resPM; |
| srcB.peekPixels(&srcPM); |
| dstB.peekPixels(&dstPM); |
| resB.peekPixels(&resPM); |
| |
| if (apply_mode(resPM, srcPM, dstPM, mode, src_alpha)) { |
| canvas->drawBitmap(resB, x, y, nullptr); |
| } |
| } |
| |
| DEF_SIMPLE_GM(xfermodes_proc4f, canvas, 1000, 1000) { |
| SkBitmap bg, srcB, dstB, transparent; |
| |
| bg.installPixels(SkImageInfo::Make(2, 2, kARGB_4444_SkColorType, kOpaque_SkAlphaType), |
| gData, 4); |
| make_bitmaps(64, 64, &dstB, &srcB, &transparent); |
| |
| canvas->translate(10, 20); |
| |
| const SkScalar w = 64; |
| const SkScalar h = 64; |
| SkMatrix m = SkMatrix::MakeScale(6, 6); |
| SkShader* s = SkShader::CreateBitmapShader(bg, |
| SkShader::kRepeat_TileMode, |
| SkShader::kRepeat_TileMode, |
| &m); |
| |
| SkPaint labelP; |
| labelP.setAntiAlias(true); |
| sk_tool_utils::set_portable_typeface(&labelP); |
| labelP.setTextAlign(SkPaint::kCenter_Align); |
| |
| const int W = 5; |
| |
| const float alphas[] = { 1.0f, 0.5f }; |
| |
| for (auto alpha : alphas) { |
| SkScalar x0 = 0; |
| SkScalar y0 = 0; |
| SkScalar x = x0, y = y0; |
| 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); |
| |
| draw_mode(srcB, dstB, canvas, mode, r.fLeft, r.fTop, alpha); |
| |
| r.inset(-SK_ScalarHalf, -SK_ScalarHalf); |
| p.setStyle(SkPaint::kStroke_Style); |
| p.setShader(nullptr); |
| 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); |
| } |
| } |
| if (y < 320) { |
| if (x > x0) { |
| y += h + SkIntToScalar(30); |
| } |
| y0 = y; |
| } else { |
| x0 += SkIntToScalar(400); |
| y0 = 0; |
| } |
| |
| canvas->translate(400, 0); |
| } |
| s->unref(); |
| } |