chromium/third_party/skia/src/gpu/ganesh/ops/AtlasPathRenderer.cpp

/*
 * Copyright 2019 Google LLC.
 *
 * 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/AtlasPathRenderer.h"

#include "include/core/SkMatrix.h"
#include "include/core/SkPath.h"
#include "include/core/SkRect.h"
#include "include/core/SkSize.h"
#include "include/gpu/GpuTypes.h"
#include "include/gpu/ganesh/GrBackendSurface.h"
#include "include/gpu/ganesh/GrContextOptions.h"
#include "include/gpu/ganesh/GrDirectContext.h"
#include "include/gpu/ganesh/GrRecordingContext.h"
#include "include/gpu/ganesh/GrTypes.h"
#include "include/private/base/SkAssert.h"
#include "include/private/base/SkDebug.h"
#include "include/private/base/SkSpan_impl.h"
#include "include/private/gpu/ganesh/GrTypesPriv.h"
#include "src/base/SkMathPriv.h"
#include "src/base/SkVx.h"
#include "src/core/SkIPoint16.h"
#include "src/gpu/ganesh/GrCaps.h"
#include "src/gpu/ganesh/GrClip.h"
#include "src/gpu/ganesh/GrDirectContextPriv.h"
#include "src/gpu/ganesh/GrDrawingManager.h"
#include "src/gpu/ganesh/GrDynamicAtlas.h"
#include "src/gpu/ganesh/GrPaint.h"
#include "src/gpu/ganesh/GrRecordingContextPriv.h"
#include "src/gpu/ganesh/GrRenderTargetProxy.h"
#include "src/gpu/ganesh/GrRenderTask.h"
#include "src/gpu/ganesh/GrStyle.h"
#include "src/gpu/ganesh/GrSurfaceProxy.h"
#include "src/gpu/ganesh/GrSurfaceProxyView.h"
#include "src/gpu/ganesh/GrTexture.h"
#include "src/gpu/ganesh/GrTextureProxy.h"
#include "src/gpu/ganesh/SurfaceDrawContext.h"
#include "src/gpu/ganesh/effects/GrModulateAtlasCoverageEffect.h"
#include "src/gpu/ganesh/geometry/GrStyledShape.h"
#include "src/gpu/ganesh/ops/AtlasRenderTask.h"
#include "src/gpu/ganesh/ops/DrawAtlasPathOp.h"
#include "src/gpu/ganesh/ops/GrOp.h"
#include "src/gpu/ganesh/ops/TessellationPathRenderer.h"

#include <algorithm>
#include <utility>

usingnamespaceskia_private;

namespace {

// Returns the rect [topLeftFloor, botRightCeil], which is the rect [r] rounded out to integer
// boundaries.
std::pair<skvx::float2, skvx::float2> round_out(const SkRect& r) { … }

// Returns whether the given proxyOwner uses the atlasProxy.
template<typename T> bool refs_atlas(const T* proxyOwner, const GrSurfaceProxy* atlasProxy) { … }

bool is_visible(const SkRect& pathDevBounds, const SkIRect& clipBounds) { … }

#ifdef SK_DEBUG
// Ensures the atlas dependencies are set up such that each atlas will be totally out of service
// before we render the next one in line. This means there will only ever be one atlas active at a
// time and that they can all share the same texture.
void validate_atlas_dependencies(
        const TArray<sk_sp<skgpu::ganesh::AtlasRenderTask>>& atlasTasks) { … }
#endif

} // anonymous namespace

namespace skgpu::ganesh {

constexpr static auto kAtlasAlpha8Type = …;
constexpr static int kAtlasInitialSize = …;

// The atlas is only used for small-area paths, which means at least one dimension of every path is
// guaranteed to be quite small. So if we transpose tall paths, then every path will have a small
// height, which lends very well to efficient pow2 atlas packing.
constexpr static auto kAtlasAlgorithm = …;

// Ensure every path in the atlas falls in or below the 256px high rectanizer band.
constexpr static int kAtlasMaxPathHeight = …;

// If we have MSAA to fall back on, paths are already fast enough that we really only benefit from
// atlasing when they are very small.
constexpr static int kAtlasMaxPathHeightWithMSAAFallback = …;

// http://skbug.com/12291 -- The way GrDynamicAtlas works, a single 2048x1 path is given an entire
// 2048x2048 atlas with draw bounds of 2048x1025. Limit the max width to 1024 to avoid this landmine
// until it's resolved.
constexpr static int kAtlasMaxPathWidth = …;

bool AtlasPathRenderer::IsSupported(GrRecordingContext* rContext) { … }

sk_sp<AtlasPathRenderer> AtlasPathRenderer::Make(GrRecordingContext* rContext) { … }

AtlasPathRenderer::AtlasPathRenderer(GrDirectContext* dContext) { … }

bool AtlasPathRenderer::pathFitsInAtlas(const SkRect& pathDevBounds,
                                        GrAAType fallbackAAType) const { … }

void AtlasPathRenderer::AtlasPathKey::set(const SkMatrix& m, const SkPath& path) { … }

bool AtlasPathRenderer::addPathToAtlas(GrRecordingContext* rContext,
                                       const SkMatrix& viewMatrix,
                                       const SkPath& path,
                                       const SkRect& pathDevBounds,
                                       SkIRect* devIBounds,
                                       SkIPoint16* locationInAtlas,
                                       bool* transposedInAtlas,
                                       const DrawRefsAtlasCallback& drawRefsAtlasCallback) { … }

PathRenderer::CanDrawPath AtlasPathRenderer::onCanDrawPath(const CanDrawPathArgs& args) const { … }

bool AtlasPathRenderer::onDrawPath(const DrawPathArgs& args) { … }

GrFPResult AtlasPathRenderer::makeAtlasClipEffect(const SurfaceDrawContext* sdc,
                                                  const GrOp* opBeingClipped,
                                                  std::unique_ptr<GrFragmentProcessor> inputFP,
                                                  const SkIRect& drawBounds,
                                                  const SkMatrix& viewMatrix,
                                                  const SkPath& path) { … }

bool AtlasPathRenderer::preFlush(GrOnFlushResourceProvider* onFlushRP) { … }

}  // namespace skgpu::ganesh