c29454d1c9
This will make it possible for drawVertices and drawCustomMesh to share implementation in Ganesh. Bug: skia:12720 Change-Id: I8b84119a29b47071ef389879bb5287873629ed3e Reviewed-on: https://skia-review.googlesource.com/c/skia/+/487978 Reviewed-by: Greg Daniel <egdaniel@google.com> Commit-Queue: Brian Salomon <bsalomon@google.com>
360 lines
14 KiB
C++
360 lines
14 KiB
C++
/*
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* Copyright 2021 Google LLC
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm/gm.h"
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#include "include/core/SkBlender.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkCustomMesh.h"
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#include "include/core/SkSurface.h"
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#include "include/effects/SkGradientShader.h"
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#include "src/core/SkCanvasPriv.h"
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#include <memory>
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namespace skiagm {
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class CustomMeshGM : public skiagm::GM {
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public:
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CustomMeshGM() {}
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protected:
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using Attribute = SkCustomMeshSpecification::Attribute;
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using Varying = SkCustomMeshSpecification::Varying;
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SkISize onISize() override { return {435, 1180}; }
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void onOnceBeforeDraw() override {
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{
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static const Attribute kAttributes[]{
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{Attribute::Type::kFloat4, 8, SkString{"xuyv"}},
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{Attribute::Type::kUByte4_unorm, 4, SkString{"brag"}},
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};
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static const Varying kVaryings[]{
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{Varying::Type::kHalf4, SkString{"color"}},
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{Varying::Type::kFloat2, SkString{"uv"} },
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};
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static constexpr char kVS[] = R"(
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half4 unswizzle_color(half4 color) { return color.garb; }
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float2 main(in Attributes attributes, out Varyings varyings) {
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varyings.color = unswizzle_color(attributes.brag);
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varyings.uv = attributes.xuyv.yw;
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return attributes.xuyv.xz;
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}
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)";
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static constexpr char kFS[] = R"(
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float2 main(in Varyings varyings, out float4 color) {
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color = varyings.color;
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return varyings.uv;
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}
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)";
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auto [spec, error] = SkCustomMeshSpecification::Make(
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SkMakeSpan(kAttributes, SK_ARRAY_COUNT(kAttributes)),
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sizeof(ColorVertex),
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SkMakeSpan(kVaryings, SK_ARRAY_COUNT(kVaryings)),
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SkString(kVS),
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SkString(kFS));
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if (!spec) {
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SkDebugf("%s\n", error.c_str());
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}
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fSpecWithColor = std::move(spec);
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}
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{
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static const Attribute kAttributes[]{
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{Attribute::Type::kFloat4, 0, SkString{"xuyv"}},
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};
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static const Varying kVaryings[]{
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{Varying::Type::kFloat2, SkString{"vux2"}},
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};
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static constexpr char kVS[] = R"(
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float2 main(in Attributes a, out Varyings v) {
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v.vux2 = 2*a.xuyv.wy;
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return a.xuyv.xz;
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}
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)";
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static constexpr char kFS[] = R"(
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float2 helper(in float2 vux2) { return vux2.yx/2; }
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float2 main(in Varyings varyings) {
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return helper(varyings.vux2);
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}
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)";
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auto [spec, error] = SkCustomMeshSpecification::Make(
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SkMakeSpan(kAttributes, SK_ARRAY_COUNT(kAttributes)),
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sizeof(NoColorVertex),
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SkMakeSpan(kVaryings, SK_ARRAY_COUNT(kVaryings)),
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SkString(kVS),
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SkString(kFS));
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if (!spec) {
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SkDebugf("%s\n", error.c_str());
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}
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fSpecWithNoColor = std::move(spec);
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}
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static constexpr SkColor kColors[] = {SK_ColorTRANSPARENT, SK_ColorWHITE};
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fShader = SkGradientShader::MakeRadial({10, 10},
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3,
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kColors,
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nullptr,
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2,
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SkTileMode::kMirror);
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}
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SkString onShortName() override { return SkString("custommesh"); }
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DrawResult onDraw(SkCanvas* canvas, SkString*) override {
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int i = 0;
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for (const sk_sp<SkBlender>& blender : {SkBlender::Mode(SkBlendMode::kDst),
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SkBlender::Mode(SkBlendMode::kSrc),
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SkBlender::Mode(SkBlendMode::kSaturation)}) {
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canvas->save();
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for (uint8_t alpha : {0xFF , 0x40})
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for (bool colors : {false, true})
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for (bool shader : {false, true}) {
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SkCustomMesh cm;
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cm.spec = colors ? fSpecWithColor : fSpecWithNoColor;
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cm.bounds = kRect;
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// Rather than pile onto the combinatorics we draw every other test case indexed.
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if ((i & 1) == 0) {
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cm.vb = colors ? static_cast<const void*>(kColorQuad)
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: static_cast<const void*>(kNoColorQuad);
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cm.vcount = 4;
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cm.mode = SkCustomMesh::Mode::kTriangleStrip;
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} else {
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cm.vb = colors ? static_cast<const void*>(kColorIndexedQuad)
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: static_cast<const void*>(kNoColorIndexedQuad);
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cm.vcount = 6;
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cm.icount = 6;
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cm.indices = kIndices;
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cm.mode = SkCustomMesh::Mode::kTriangles;
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}
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SkPaint paint;
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paint.setColor(SK_ColorGREEN);
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paint.setShader(shader ? fShader : nullptr);
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paint.setAlpha(alpha);
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SkCanvasPriv::DrawCustomMesh(canvas, std::move(cm), blender, paint);
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canvas->translate(0, 150);
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++i;
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}
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canvas->restore();
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canvas->translate(150, 0);
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}
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return DrawResult::kOk;
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}
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private:
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struct ColorVertex {
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uint32_t pad;
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uint32_t brag;
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float xuyv[4];
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};
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struct NoColorVertex {
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float xuyv[4];
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};
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static constexpr auto kRect = SkRect::MakeLTRB(20, 20, 120, 120);
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static constexpr auto kUV = SkRect::MakeLTRB( 0, 0, 20, 20);
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static constexpr ColorVertex kColorQuad[] {
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{0, 0x00FFFF00, {kRect.left(), kUV.left(), kRect.top(), kUV.top() }},
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{0, 0x00FFFFFF, {kRect.right(), kUV.right(), kRect.top(), kUV.top() }},
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{0, 0xFFFF00FF, {kRect.left(), kUV.left(), kRect.bottom(), kUV.bottom()}},
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{0, 0xFFFFFF00, {kRect.right(), kUV.right(), kRect.bottom(), kUV.bottom()}},
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};
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static constexpr NoColorVertex kNoColorQuad[]{
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{{kRect.left(), kUV.left(), kRect.top(), kUV.top() }},
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{{kRect.right(), kUV.right(), kRect.top(), kUV.top() }},
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{{kRect.left(), kUV.left(), kRect.bottom(), kUV.bottom()}},
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{{kRect.right(), kUV.right(), kRect.bottom(), kUV.bottom()}},
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};
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// The indexed quads draw the same as the non-indexed. They just have unused vertices that the
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// index buffer skips over draw with triangles instead of a triangle strip.
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static constexpr ColorVertex kColorIndexedQuad[] {
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{0, 0x00FFFF00, {kRect.left(), kUV.left(), kRect.top(), kUV.top() }},
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{0, 0x00000000, { 100.f, 0.f, 100.f, 5.f }}, // unused
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{0, 0x00FFFFFF, {kRect.right(), kUV.right(), kRect.top(), kUV.top() }},
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{0, 0x00000000, { 200.f, 10.f, 200.f, 10.f }}, // unused
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{0, 0xFFFF00FF, {kRect.left(), kUV.left(), kRect.bottom(), kUV.bottom()}},
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{0, 0xFFFFFF00, {kRect.right(), kUV.right(), kRect.bottom(), kUV.bottom()}},
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};
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static constexpr NoColorVertex kNoColorIndexedQuad[]{
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{{kRect.left(), kUV.left(), kRect.top(), kUV.top() }},
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{{ 100.f, 0.f, 100.f, 5.f }}, // unused
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{{kRect.right(), kUV.right(), kRect.top(), kUV.top() }},
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{{ 200.f, 10.f, 200.f, 10.f }}, // unused
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{{kRect.left(), kUV.left(), kRect.bottom(), kUV.bottom()}},
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{{kRect.right(), kUV.right(), kRect.bottom(), kUV.bottom()}},
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};
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static constexpr uint16_t kIndices[]{0, 2, 4, 2, 5, 4};
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sk_sp<SkShader> fShader;
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sk_sp<SkCustomMeshSpecification> fSpecWithColor;
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sk_sp<SkCustomMeshSpecification> fSpecWithNoColor;
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};
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constexpr SkRect CustomMeshGM::kRect;
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constexpr SkRect CustomMeshGM::kUV;
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constexpr CustomMeshGM::ColorVertex CustomMeshGM::kColorQuad[];
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constexpr CustomMeshGM::NoColorVertex CustomMeshGM::kNoColorQuad[];
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constexpr CustomMeshGM::ColorVertex CustomMeshGM::kColorIndexedQuad[];
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constexpr CustomMeshGM::NoColorVertex CustomMeshGM::kNoColorIndexedQuad[];
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constexpr uint16_t CustomMeshGM::kIndices[];
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DEF_GM( return new CustomMeshGM; )
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class CustomMeshColorSpaceGM : public skiagm::GM {
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public:
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CustomMeshColorSpaceGM() {}
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protected:
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using Attribute = SkCustomMeshSpecification::Attribute;
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using Varying = SkCustomMeshSpecification::Varying;
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SkISize onISize() override { return {468, 258}; }
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void onOnceBeforeDraw() override {
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static const Attribute kAttributes[]{
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{Attribute::Type::kFloat2, 0, SkString{"pos"} },
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{Attribute::Type::kFloat4, 8, SkString{"color"}},
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};
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static const Varying kVaryings[]{
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{Varying::Type::kHalf4, SkString{"color"}},
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};
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static constexpr char kPremulVS[] = R"(
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float2 main(in Attributes attributes, out Varyings varyings) {
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varyings.color = half4(attributes.color.a*attributes.color.rgb,
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attributes.color.a);
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return attributes.pos;
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}
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)";
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static constexpr char kUnpremulVS[] = R"(
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float2 main(in Attributes attributes, out Varyings varyings) {
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varyings.color = attributes.color;
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return attributes.pos;
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}
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)";
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static constexpr char kFS[] = R"(
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void main(in Varyings varyings, out half4 color) {
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color = varyings.color;
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}
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)";
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for (bool unpremul : {false, true}) {
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auto at = unpremul ? kUnpremul_SkAlphaType : kPremul_SkAlphaType;
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auto vs = unpremul ? kUnpremulVS : kPremulVS;
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for (bool spin : {false, true}) {
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auto cs = SkColorSpace::MakeSRGB();
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if (spin) {
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cs = cs->makeColorSpin();
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}
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auto [spec, error] = SkCustomMeshSpecification::Make(
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SkMakeSpan(kAttributes, SK_ARRAY_COUNT(kAttributes)),
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sizeof(Vertex),
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SkMakeSpan(kVaryings, SK_ARRAY_COUNT(kVaryings)),
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SkString(vs),
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SkString(kFS),
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std::move(cs),
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at);
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if (!spec) {
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SkDebugf("%s\n", error.c_str());
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}
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fSpecs[SpecIndex(unpremul, spin)] = std::move(spec);
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}
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}
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SkPoint pts[] = {{kRect.fLeft, 0}, {kRect.centerX(), 0}};
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SkColor colors[] = {SK_ColorWHITE, SK_ColorTRANSPARENT};
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fShader = SkGradientShader::MakeLinear(pts, colors, nullptr, 2, SkTileMode::kMirror);
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}
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SkString onShortName() override { return SkString("custommesh_cs"); }
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DrawResult onDraw(SkCanvas* canvas, SkString* error) override {
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// Force an intermediate surface if the canvas is in "legacy" mode
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SkCanvas* c = canvas;
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sk_sp<SkSurface> surface;
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if (!c->imageInfo().colorSpace()) {
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SkImageInfo info = canvas->imageInfo().makeColorSpace(SkColorSpace::MakeSRGB());
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surface = canvas->makeSurface(info);
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if (!surface) {
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// This GM won't work on configs that use a recording canvas.
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return DrawResult::kSkip;
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}
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c = surface->getCanvas();
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c->clear(SK_ColorWHITE);
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}
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for (bool useShader : {false, true})
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for (bool unpremul : {false, true}) {
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c->save();
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for (bool spin : {false, true}) {
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SkCustomMesh cm;
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cm.spec = fSpecs[SpecIndex(unpremul, spin)];
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cm.bounds = kRect;
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cm.vb = kQuad;
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cm.vcount = 4;
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cm.mode = SkCustomMesh::Mode::kTriangleStrip;
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SkPaint paint;
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paint.setShader(useShader ? fShader : nullptr);
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SkBlendMode mode = useShader ? SkBlendMode::kModulate : SkBlendMode::kDst;
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SkCanvasPriv::DrawCustomMesh(c,
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std::move(cm),
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SkBlender::Mode(mode),
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paint);
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c->translate(0, kRect.height() + 10);
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}
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c->restore();
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c->translate(kRect.width() + 10, 0);
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c->save();
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}
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if (surface) {
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surface->draw(canvas, 0, 0);
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}
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return DrawResult::kOk;
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}
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private:
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struct Vertex {
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SkPoint pos;
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SkColor4f color;
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};
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static int SpecIndex(bool spin, bool unpremul) {
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return static_cast<int>(spin) + 2*static_cast<int>(unpremul);
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}
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static constexpr auto kRect = SkRect::MakeLTRB(20, 20, 120, 120);
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static constexpr Vertex kQuad[] {
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{{kRect.left() , kRect.top() }, {1, 0, 0, 1}},
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{{kRect.right(), kRect.top() }, {0, 1, 0, 0}},
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{{kRect.left() , kRect.bottom()}, {1, 1, 0, 0}},
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{{kRect.right(), kRect.bottom()}, {0, 0, 1, 1}},
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};
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sk_sp<SkCustomMeshSpecification> fSpecs[4];
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sk_sp<SkShader> fShader;
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};
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constexpr SkRect CustomMeshColorSpaceGM::kRect;
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constexpr CustomMeshColorSpaceGM::Vertex CustomMeshColorSpaceGM::kQuad[];
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DEF_GM( return new CustomMeshColorSpaceGM; )
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} // namespace skiagm
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