| /* |
| * Copyright 2015 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/SkBlendMode.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkColor.h" |
| #include "include/core/SkFont.h" |
| #include "include/core/SkImage.h" |
| #include "include/core/SkImageInfo.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkRSXform.h" |
| #include "include/core/SkRect.h" |
| #include "include/core/SkRefCnt.h" |
| #include "include/core/SkScalar.h" |
| #include "include/core/SkSize.h" |
| #include "include/core/SkString.h" |
| #include "include/core/SkSurface.h" |
| #include "include/core/SkTypeface.h" |
| #include "include/core/SkTypes.h" |
| #include "tools/ToolUtils.h" |
| |
| // Create a square atlas of: |
| // opaque white | opaque red |
| // ------------------------------------ |
| // opaque green | transparent black |
| // |
| static sk_sp<SkImage> make_atlas(SkCanvas* caller, int atlasSize) { |
| const int kBlockSize = atlasSize/2; |
| |
| SkImageInfo info = SkImageInfo::MakeN32Premul(atlasSize, atlasSize); |
| auto surface(ToolUtils::makeSurface(caller, info)); |
| SkCanvas* canvas = surface->getCanvas(); |
| |
| SkPaint paint; |
| paint.setBlendMode(SkBlendMode::kSrc); |
| |
| paint.setColor(SK_ColorWHITE); |
| SkRect r = SkRect::MakeXYWH(0, 0, |
| SkIntToScalar(kBlockSize), SkIntToScalar(kBlockSize)); |
| canvas->drawRect(r, paint); |
| |
| paint.setColor(SK_ColorRED); |
| r = SkRect::MakeXYWH(SkIntToScalar(kBlockSize), 0, |
| SkIntToScalar(kBlockSize), SkIntToScalar(kBlockSize)); |
| canvas->drawRect(r, paint); |
| |
| paint.setColor(SK_ColorGREEN); |
| r = SkRect::MakeXYWH(0, SkIntToScalar(kBlockSize), |
| SkIntToScalar(kBlockSize), SkIntToScalar(kBlockSize)); |
| canvas->drawRect(r, paint); |
| |
| paint.setColor(SK_ColorTRANSPARENT); |
| r = SkRect::MakeXYWH(SkIntToScalar(kBlockSize), SkIntToScalar(kBlockSize), |
| SkIntToScalar(kBlockSize), SkIntToScalar(kBlockSize)); |
| canvas->drawRect(r, paint); |
| |
| return surface->makeImageSnapshot(); |
| } |
| |
| // This GM tests the drawAtlas API with colors, different xfer modes |
| // and transparency in the atlas image |
| class DrawAtlasColorsGM : public skiagm::GM { |
| public: |
| DrawAtlasColorsGM() { |
| this->setBGColor(0xFFCCCCCC); |
| } |
| |
| protected: |
| SkString onShortName() override { |
| return SkString("draw-atlas-colors"); |
| } |
| |
| SkISize onISize() override { |
| return SkISize::Make(kNumXferModes * (kAtlasSize + kPad) + kPad, |
| 2 * kNumColors * (kAtlasSize + kPad) + kTextPad + kPad); |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| const SkRect target = SkRect::MakeWH(SkIntToScalar(kAtlasSize), SkIntToScalar(kAtlasSize)); |
| |
| auto atlas = make_atlas(canvas, kAtlasSize); |
| |
| const SkBlendMode gModes[] = { |
| SkBlendMode::kClear, |
| SkBlendMode::kSrc, |
| SkBlendMode::kDst, |
| SkBlendMode::kSrcOver, |
| SkBlendMode::kDstOver, |
| SkBlendMode::kSrcIn, |
| SkBlendMode::kDstIn, |
| SkBlendMode::kSrcOut, |
| SkBlendMode::kDstOut, |
| SkBlendMode::kSrcATop, |
| SkBlendMode::kDstATop, |
| SkBlendMode::kXor, |
| SkBlendMode::kPlus, |
| SkBlendMode::kModulate, |
| SkBlendMode::kScreen, |
| SkBlendMode::kOverlay, |
| SkBlendMode::kDarken, |
| SkBlendMode::kLighten, |
| SkBlendMode::kColorDodge, |
| SkBlendMode::kColorBurn, |
| SkBlendMode::kHardLight, |
| SkBlendMode::kSoftLight, |
| SkBlendMode::kDifference, |
| SkBlendMode::kExclusion, |
| SkBlendMode::kMultiply, |
| SkBlendMode::kHue, |
| SkBlendMode::kSaturation, |
| SkBlendMode::kColor, |
| SkBlendMode::kLuminosity, |
| }; |
| |
| SkColor gColors[] = { |
| SK_ColorWHITE, |
| SK_ColorRED, |
| 0x88888888, // transparent grey |
| 0x88000088 // transparent blue |
| }; |
| |
| const int numModes = SK_ARRAY_COUNT(gModes); |
| SkASSERT(numModes == kNumXferModes); |
| const int numColors = SK_ARRAY_COUNT(gColors); |
| SkASSERT(numColors == kNumColors); |
| SkRSXform xforms[numColors]; |
| SkRect rects[numColors]; |
| SkColor quadColors[numColors]; |
| |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| |
| for (int i = 0; i < numColors; ++i) { |
| xforms[i].set(1.0f, 0.0f, SkIntToScalar(kPad), i*(target.width()+kPad)); |
| rects[i] = target; |
| quadColors[i] = gColors[i]; |
| } |
| |
| SkFont font(ToolUtils::create_portable_typeface(), kTextPad); |
| |
| for (int i = 0; i < numModes; ++i) { |
| const char* label = SkBlendMode_Name(gModes[i]); |
| canvas->drawString(label, i*(target.width()+kPad)+kPad, SkIntToScalar(kTextPad), |
| font, paint); |
| } |
| |
| for (int i = 0; i < numModes; ++i) { |
| canvas->save(); |
| canvas->translate(SkIntToScalar(i*(target.height()+kPad)), |
| SkIntToScalar(kTextPad+kPad)); |
| // w/o a paint |
| canvas->drawAtlas(atlas.get(), xforms, rects, quadColors, numColors, |
| gModes[i], nullptr, nullptr); |
| canvas->translate(0.0f, numColors*(target.height()+kPad)); |
| // w a paint |
| canvas->drawAtlas(atlas.get(), xforms, rects, quadColors, numColors, |
| gModes[i], nullptr, &paint); |
| canvas->restore(); |
| } |
| } |
| |
| private: |
| static constexpr int kNumXferModes = 29; |
| static constexpr int kNumColors = 4; |
| static constexpr int kAtlasSize = 30; |
| static constexpr int kPad = 2; |
| static constexpr int kTextPad = 8; |
| |
| typedef GM INHERITED; |
| }; |
| DEF_GM( return new DrawAtlasColorsGM; ) |