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- /*
- * Copyright 2011 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #ifndef GrPathRendererChain_DEFINED
- #define GrPathRendererChain_DEFINED
- #include "src/gpu/GrPathRenderer.h"
- #include "include/core/SkTypes.h"
- #include "include/private/GrTypesPriv.h"
- #include "include/private/SkNoncopyable.h"
- #include "include/private/SkTArray.h"
- class GrContext;
- class GrCoverageCountingPathRenderer;
- /**
- * Keeps track of an ordered list of path renderers. When a path needs to be
- * drawn this list is scanned to find the most preferred renderer. To add your
- * path renderer to the list implement the GrPathRenderer::AddPathRenderers
- * function.
- */
- class GrPathRendererChain : public SkNoncopyable {
- public:
- struct Options {
- bool fAllowPathMaskCaching = false;
- GpuPathRenderers fGpuPathRenderers = GpuPathRenderers::kAll;
- };
- GrPathRendererChain(GrRecordingContext* context, const Options&);
- /** Documents how the caller plans to use a GrPathRenderer to draw a path. It affects the PR
- returned by getPathRenderer */
- enum class DrawType {
- kColor, // draw to the color buffer, no AA
- kStencil, // draw just to the stencil buffer
- kStencilAndColor, // draw the stencil and color buffer, no AA
- };
- /** Returns a GrPathRenderer compatible with the request if one is available. If the caller
- is drawing the path to the stencil buffer then stencilSupport can be used to determine
- whether the path can be rendered with arbitrary stencil rules or not. See comments on
- StencilSupport in GrPathRenderer.h. */
- GrPathRenderer* getPathRenderer(const GrPathRenderer::CanDrawPathArgs& args,
- DrawType drawType,
- GrPathRenderer::StencilSupport* stencilSupport);
- /** Returns a direct pointer to the coverage counting path renderer, or null if it is not in the
- chain. */
- GrCoverageCountingPathRenderer* getCoverageCountingPathRenderer() {
- return fCoverageCountingPathRenderer;
- }
- private:
- enum {
- kPreAllocCount = 8,
- };
- SkSTArray<kPreAllocCount, sk_sp<GrPathRenderer>> fChain;
- GrCoverageCountingPathRenderer* fCoverageCountingPathRenderer = nullptr;
- };
- #endif
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