| /* |
| * Copyright 2013 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/SkColorFilter.h" |
| #include "include/core/SkMatrix.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkPoint.h" |
| #include "include/core/SkRefCnt.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/SkTypes.h" |
| #include "include/core/SkVertices.h" |
| #include "include/effects/SkGradientShader.h" |
| #include "include/effects/SkRuntimeEffect.h" |
| #include "include/private/base/SkTDArray.h" |
| #include "include/utils/SkRandom.h" |
| #include "src/core/SkVerticesPriv.h" |
| #include "src/shaders/SkLocalMatrixShader.h" |
| #include "src/utils/SkPatchUtils.h" |
| #include "tools/Resources.h" |
| #include "tools/ToolUtils.h" |
| |
| #include <initializer_list> |
| #include <utility> |
| |
| static constexpr SkScalar kShaderSize = 40; |
| static sk_sp<SkShader> make_shader1(SkScalar shaderScale) { |
| const SkColor colors[] = { |
| SK_ColorRED, SK_ColorCYAN, SK_ColorGREEN, SK_ColorWHITE, |
| SK_ColorMAGENTA, SK_ColorBLUE, SK_ColorYELLOW, |
| }; |
| const SkPoint pts[] = {{kShaderSize / 4, 0}, {3 * kShaderSize / 4, kShaderSize}}; |
| const SkMatrix localMatrix = SkMatrix::Scale(shaderScale, shaderScale); |
| |
| sk_sp<SkShader> grad = SkGradientShader::MakeLinear(pts, colors, nullptr, |
| std::size(colors), |
| SkTileMode::kMirror, 0, |
| &localMatrix); |
| // Throw in a couple of local matrix wrappers for good measure. |
| return shaderScale == 1 |
| ? grad |
| : sk_make_sp<SkLocalMatrixShader>( |
| sk_make_sp<SkLocalMatrixShader>(std::move(grad), SkMatrix::Translate(-10, 0)), |
| SkMatrix::Translate(10, 0)); |
| } |
| |
| static sk_sp<SkShader> make_shader2() { |
| return SkShaders::Color(SK_ColorBLUE); |
| } |
| |
| static sk_sp<SkColorFilter> make_color_filter() { |
| return SkColorFilters::Blend(0xFFAABBCC, SkBlendMode::kDarken); |
| } |
| |
| static constexpr SkScalar kMeshSize = 30; |
| |
| // start with the center of a 3x3 grid of vertices. |
| static constexpr uint16_t kMeshFan[] = { |
| 4, |
| 0, 1, 2, 5, 8, 7, 6, 3, 0 |
| }; |
| |
| static const int kMeshIndexCnt = (int)std::size(kMeshFan); |
| static const int kMeshVertexCnt = 9; |
| |
| static void fill_mesh(SkPoint pts[kMeshVertexCnt], SkPoint texs[kMeshVertexCnt], |
| SkColor colors[kMeshVertexCnt], SkScalar shaderScale) { |
| pts[0].set(0, 0); |
| pts[1].set(kMeshSize / 2, 3); |
| pts[2].set(kMeshSize, 0); |
| pts[3].set(3, kMeshSize / 2); |
| pts[4].set(kMeshSize / 2, kMeshSize / 2); |
| pts[5].set(kMeshSize - 3, kMeshSize / 2); |
| pts[6].set(0, kMeshSize); |
| pts[7].set(kMeshSize / 2, kMeshSize - 3); |
| pts[8].set(kMeshSize, kMeshSize); |
| |
| const auto shaderSize = kShaderSize * shaderScale; |
| texs[0].set(0, 0); |
| texs[1].set(shaderSize / 2, 0); |
| texs[2].set(shaderSize, 0); |
| texs[3].set(0, shaderSize / 2); |
| texs[4].set(shaderSize / 2, shaderSize / 2); |
| texs[5].set(shaderSize, shaderSize / 2); |
| texs[6].set(0, shaderSize); |
| texs[7].set(shaderSize / 2, shaderSize); |
| texs[8].set(shaderSize, shaderSize); |
| |
| SkRandom rand; |
| for (size_t i = 0; i < kMeshVertexCnt; ++i) { |
| colors[i] = rand.nextU() | 0xFF000000; |
| } |
| } |
| |
| class VerticesGM : public skiagm::GM { |
| SkPoint fPts[kMeshVertexCnt]; |
| SkPoint fTexs[kMeshVertexCnt]; |
| SkColor fColors[kMeshVertexCnt]; |
| sk_sp<SkShader> fShader1; |
| sk_sp<SkShader> fShader2; |
| sk_sp<SkColorFilter> fColorFilter; |
| SkScalar fShaderScale; |
| |
| public: |
| VerticesGM(SkScalar shaderScale) : fShaderScale(shaderScale) {} |
| |
| protected: |
| |
| void onOnceBeforeDraw() override { |
| fill_mesh(fPts, fTexs, fColors, fShaderScale); |
| fShader1 = make_shader1(fShaderScale); |
| fShader2 = make_shader2(); |
| fColorFilter = make_color_filter(); |
| } |
| |
| SkString onShortName() override { |
| SkString name("vertices"); |
| if (fShaderScale != 1) { |
| name.append("_scaled_shader"); |
| } |
| return name; |
| } |
| |
| SkISize onISize() override { |
| return SkISize::Make(975, 1175); |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| const SkBlendMode modes[] = { |
| 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, |
| }; |
| |
| SkPaint paint; |
| |
| canvas->translate(4, 4); |
| for (auto mode : modes) { |
| canvas->save(); |
| for (float alpha : {1.0f, 0.5f}) { |
| for (const auto& cf : {sk_sp<SkColorFilter>(nullptr), fColorFilter}) { |
| for (const auto& shader : {fShader1, fShader2}) { |
| static constexpr struct { |
| bool fHasColors; |
| bool fHasTexs; |
| } kAttrs[] = {{true, false}, {false, true}, {true, true}}; |
| for (auto attrs : kAttrs) { |
| paint.setShader(shader); |
| paint.setColorFilter(cf); |
| paint.setAlphaf(alpha); |
| |
| const SkColor* colors = attrs.fHasColors ? fColors : nullptr; |
| const SkPoint* texs = attrs.fHasTexs ? fTexs : nullptr; |
| auto v = SkVertices::MakeCopy(SkVertices::kTriangleFan_VertexMode, |
| kMeshVertexCnt, fPts, texs, colors, |
| kMeshIndexCnt, kMeshFan); |
| canvas->drawVertices(v, mode, paint); |
| canvas->translate(40, 0); |
| } |
| } |
| } |
| } |
| canvas->restore(); |
| canvas->translate(0, 40); |
| } |
| } |
| |
| private: |
| using INHERITED = skiagm::GM; |
| }; |
| |
| ///////////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_GM(return new VerticesGM(1);) |
| DEF_GM(return new VerticesGM(1 / kShaderSize);) |
| |
| static void draw_batching(SkCanvas* canvas) { |
| // Triangle fans can't batch so we convert to regular triangles, |
| static constexpr int kNumTris = kMeshIndexCnt - 2; |
| SkVertices::Builder builder(SkVertices::kTriangles_VertexMode, kMeshVertexCnt, 3 * kNumTris, |
| SkVertices::kHasColors_BuilderFlag | |
| SkVertices::kHasTexCoords_BuilderFlag); |
| |
| SkPoint* pts = builder.positions(); |
| SkPoint* texs = builder.texCoords(); |
| SkColor* colors = builder.colors(); |
| fill_mesh(pts, texs, colors, 1); |
| |
| SkTDArray<SkMatrix> matrices; |
| matrices.append()->reset(); |
| matrices.append()->setTranslate(0, 40); |
| matrices.append() |
| ->setRotate(45, kMeshSize / 2, kMeshSize / 2) |
| .postScale(1.2f, .8f, kMeshSize / 2, kMeshSize / 2) |
| .postTranslate(0, 80); |
| |
| auto shader = make_shader1(1); |
| |
| uint16_t* indices = builder.indices(); |
| for (size_t i = 0; i < kNumTris; ++i) { |
| indices[3 * i] = kMeshFan[0]; |
| indices[3 * i + 1] = kMeshFan[i + 1]; |
| indices[3 * i + 2] = kMeshFan[i + 2]; |
| |
| } |
| |
| canvas->save(); |
| canvas->translate(10, 10); |
| for (bool useShader : {false, true}) { |
| for (bool useTex : {false, true}) { |
| for (const auto& m : matrices) { |
| canvas->save(); |
| canvas->concat(m); |
| SkPaint paint; |
| paint.setShader(useShader ? shader : nullptr); |
| paint.setColor(SK_ColorWHITE); |
| |
| const SkPoint* t = useTex ? texs : nullptr; |
| auto v = SkVertices::MakeCopy(SkVertices::kTriangles_VertexMode, kMeshVertexCnt, |
| pts, t, colors, kNumTris * 3, indices); |
| canvas->drawVertices(v, SkBlendMode::kModulate, paint); |
| canvas->restore(); |
| } |
| canvas->translate(0, 120); |
| } |
| } |
| canvas->restore(); |
| } |
| |
| // This test exists to exercise batching in the gpu backend. |
| DEF_SIMPLE_GM(vertices_batching, canvas, 100, 500) { |
| draw_batching(canvas); |
| canvas->translate(50, 0); |
| draw_batching(canvas); |
| } |
| |
| // Test case for skbug.com/10069. We need to draw the vertices twice (with different matrices) to |
| // trigger the bug. |
| DEF_SIMPLE_GM(vertices_perspective, canvas, 256, 256) { |
| SkPaint paint; |
| paint.setShader(ToolUtils::create_checkerboard_shader(SK_ColorBLACK, SK_ColorWHITE, 32)); |
| |
| SkRect r = SkRect::MakeWH(128, 128); |
| |
| SkPoint pos[4]; |
| r.toQuad(pos); |
| auto verts = SkVertices::MakeCopy(SkVertices::kTriangleFan_VertexMode, 4, pos, pos, nullptr); |
| |
| SkMatrix persp; |
| persp.setPerspY(SK_Scalar1 / 100); |
| |
| canvas->save(); |
| canvas->concat(persp); |
| canvas->drawRect(r, paint); |
| canvas->restore(); |
| |
| canvas->save(); |
| canvas->translate(r.width(), 0); |
| canvas->concat(persp); |
| canvas->drawRect(r, paint); |
| canvas->restore(); |
| |
| canvas->save(); |
| canvas->translate(0, r.height()); |
| canvas->concat(persp); |
| canvas->drawVertices(verts, SkBlendMode::kModulate, paint); |
| canvas->restore(); |
| |
| canvas->save(); |
| canvas->translate(r.width(), r.height()); |
| canvas->concat(persp); |
| canvas->drawVertices(verts, SkBlendMode::kModulate, paint); |
| canvas->restore(); |
| } |
| |
| DEF_SIMPLE_GM(skbug_13047, canvas, 200, 200) { |
| auto image = GetResourceAsImage("images/mandrill_128.png"); |
| |
| const float w = image->width(); |
| const float h = image->height(); |
| |
| SkPoint verts[] = {{0, 0}, {200, 0}, {200, 200}, {0, 200}}; |
| SkPoint texs[] = {{0, 0}, {w, 0}, {w, h}, {0, h}}; |
| uint16_t indices[] = {0, 1, 2, 2, 3, 0}; |
| |
| auto v = SkVertices::MakeCopy( |
| SkVertices::kTriangles_VertexMode, 4, verts, texs, nullptr, 6, indices); |
| |
| auto m = SkMatrix::Scale(2, 2); // ignored in CPU ??? |
| auto s = image->makeShader(SkSamplingOptions(SkFilterMode::kLinear), &m); |
| |
| SkPaint p; |
| p.setShader(s); |
| |
| canvas->drawVertices(v, SkBlendMode::kModulate, p); |
| } |