QuadPerEdgeAA.cpp | Explore in Territory

/*
 * Copyright 2018 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
#include "src/gpu/ganesh/ops/QuadPerEdgeAA.h"

#include "include/core/SkBlendMode.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkRect.h"
#include "include/private/base/SkMath.h"
#include "src/base/SkArenaAlloc.h"
#include "src/base/SkVx.h"
#include "src/core/SkSLTypeShared.h"
#include "src/gpu/KeyBuilder.h"
#include "src/gpu/ganesh/GrBuffer.h"
#include "src/gpu/ganesh/GrCaps.h"
#include "src/gpu/ganesh/GrColorSpaceXform.h"
#include "src/gpu/ganesh/GrGeometryProcessor.h"
#include "src/gpu/ganesh/GrMeshDrawTarget.h"
#include "src/gpu/ganesh/GrOpsRenderPass.h"
#include "src/gpu/ganesh/GrResourceProvider.h"
#include "src/gpu/ganesh/GrShaderVar.h"
#include "src/gpu/ganesh/geometry/GrQuadUtils.h"
#include "src/gpu/ganesh/glsl/GrGLSLColorSpaceXformHelper.h"
#include "src/gpu/ganesh/glsl/GrGLSLFragmentShaderBuilder.h"
#include "src/gpu/ganesh/glsl/GrGLSLVarying.h"
#include "src/gpu/ganesh/glsl/GrGLSLVertexGeoBuilder.h"

#include <cstdint>
#include <memory>
#include <utility>

class GrBackendFormat;
class GrGLSLProgramDataManager;
namespace skgpu {
class Swizzle;
}

static_assert …;
static_assert …;
static_assert …;
static_assert …;
static_assert …;
static_assert …;

namespace skgpu::ganesh::QuadPerEdgeAA {

namespace {

VertexSpec;
CoverageMode;
ColorType;

// Generic WriteQuadProc that can handle any VertexSpec. It writes the 4 vertices in triangle strip
// order, although the data per-vertex is dependent on the VertexSpec.
void write_quad_generic(VertexWriter* vb,
                        const VertexSpec& spec,
                        const GrQuad* deviceQuad,
                        const GrQuad* localQuad,
                        const float coverage[4],
                        const SkPMColor4f& color,
                        const SkRect& geomSubset,
                        const SkRect& texSubset) { … }

// Specialized WriteQuadProcs for particular VertexSpecs that show up frequently (determined
// experimentally through recorded GMs, SKPs, and SVGs, as well as SkiaRenderer's usage patterns):

// 2D (XY), no explicit coverage, vertex color, no locals, no geometry subset, no texture subsetn
// This represents simple, solid color or shader, non-AA (or AA with cov. as alpha) rects.
void write_2d_color(VertexWriter* vb,
                    const VertexSpec& spec,
                    const GrQuad* deviceQuad,
                    const GrQuad* localQuad,
                    const float coverage[4],
                    const SkPMColor4f& color,
                    const SkRect& geomSubset,
                    const SkRect& texSubset) { … }

// 2D (XY), no explicit coverage, UV locals, no color, no geometry subset, no texture subset
// This represents opaque, non AA, textured rects
void write_2d_uv(VertexWriter* vb,
                 const VertexSpec& spec,
                 const GrQuad* deviceQuad,
                 const GrQuad* localQuad,
                 const float coverage[4],
                 const SkPMColor4f& color,
                 const SkRect& geomSubset,
                 const SkRect& texSubset) { … }

// 2D (XY), no explicit coverage, UV locals, vertex color, no geometry or texture subsets
// This represents transparent, non AA (or AA with cov. as alpha), textured rects
void write_2d_color_uv(VertexWriter* vb,
                       const VertexSpec& spec,
                       const GrQuad* deviceQuad,
                       const GrQuad* localQuad,
                       const float coverage[4],
                       const SkPMColor4f& color,
                       const SkRect& geomSubset,
                       const SkRect& texSubset) { … }

// 2D (XY), explicit coverage, UV locals, no color, no geometry subset, no texture subset
// This represents opaque, AA, textured rects
void write_2d_cov_uv(VertexWriter* vb,
                     const VertexSpec& spec,
                     const GrQuad* deviceQuad,
                     const GrQuad* localQuad,
                     const float coverage[4],
                     const SkPMColor4f& color,
                     const SkRect& geomSubset,
                     const SkRect& texSubset) { … }

// NOTE: The three _strict specializations below match the non-strict uv functions above, except
// that they also write the UV subset. These are included to benefit SkiaRenderer, which must make
// use of both fast and strict constrained subsets. When testing _strict was not that common across
// GMS, SKPs, and SVGs but we have little visibility into actual SkiaRenderer statistics. If
// SkiaRenderer can avoid subsets more, these 3 functions should probably be removed for simplicity.

// 2D (XY), no explicit coverage, UV locals, no color, tex subset but no geometry subset
// This represents opaque, non AA, textured rects with strict uv sampling
void write_2d_uv_strict(VertexWriter* vb,
                        const VertexSpec& spec,
                        const GrQuad* deviceQuad,
                        const GrQuad* localQuad,
                        const float coverage[4],
                        const SkPMColor4f& color,
                        const SkRect& geomSubset,
                        const SkRect& texSubset) { … }

// 2D (XY), no explicit coverage, UV locals, vertex color, tex subset but no geometry subset
// This represents transparent, non AA (or AA with cov. as alpha), textured rects with strict sample
void write_2d_color_uv_strict(VertexWriter* vb,
                              const VertexSpec& spec,
                              const GrQuad* deviceQuad,
                              const GrQuad* localQuad,
                              const float coverage[4],
                              const SkPMColor4f& color,
                              const SkRect& geomSubset,
                              const SkRect& texSubset) { … }

// 2D (XY), explicit coverage, UV locals, no color, tex subset but no geometry subset
// This represents opaque, AA, textured rects with strict uv sampling
void write_2d_cov_uv_strict(VertexWriter* vb,
                            const VertexSpec& spec,
                            const GrQuad* deviceQuad,
                            const GrQuad* localQuad,
                            const float coverage[4],
                            const SkPMColor4f& color,
                            const SkRect& geomSubset,
                            const SkRect& texSubset) { … }

} // anonymous namespace

IndexBufferOption CalcIndexBufferOption(GrAAType aa, int numQuads) { … }

// This is a more elaborate version of fitsInBytes() that allows "no color" for white
ColorType MinColorType(SkPMColor4f color) { … }

////////////////// Tessellator Implementation

Tessellator::WriteQuadProc Tessellator::GetWriteQuadProc(const VertexSpec& spec) { … }

Tessellator::Tessellator(const VertexSpec& spec, char* vertices)
        : … { … }

void Tessellator::append(GrQuad* deviceQuad, GrQuad* localQuad,
                         const SkPMColor4f& color, const SkRect& uvSubset, GrQuadAAFlags aaFlags) { … }

sk_sp<const GrBuffer> GetIndexBuffer(GrMeshDrawTarget* target,
                                     IndexBufferOption indexBufferOption) { … }

int QuadLimit(IndexBufferOption option) { … }

void IssueDraw(const GrCaps& caps, GrOpsRenderPass* renderPass, const VertexSpec& spec,
               int runningQuadCount, int quadsInDraw, int maxVerts, int absVertBufferOffset) { … }

////////////////// VertexSpec Implementation

int VertexSpec::deviceDimensionality() const { … }

int VertexSpec::localDimensionality() const { … }

CoverageMode VertexSpec::coverageMode() const { … }

// This needs to stay in sync w/ QuadPerEdgeAAGeometryProcessor::initializeAttrs
size_t VertexSpec::vertexSize() const { … }

////////////////// Geometry Processor Implementation

class QuadPerEdgeAAGeometryProcessor : public GrGeometryProcessor { … };

GrGeometryProcessor* MakeProcessor(SkArenaAlloc* arena, const VertexSpec& spec) { … }

GrGeometryProcessor* MakeTexturedProcessor(SkArenaAlloc* arena,
                                           const VertexSpec& spec,
                                           const GrShaderCaps& caps,
                                           const GrBackendFormat& backendFormat,
                                           GrSamplerState samplerState,
                                           const skgpu::Swizzle& swizzle,
                                           sk_sp<GrColorSpaceXform> textureColorSpaceXform,
                                           Saturate saturate) { … }

}  // namespace skgpu::ganesh::QuadPerEdgeAA
chromium/third_party/skia/src/gpu/ganesh/ops/QuadPerEdgeAA.cpp
