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https://github.com/flutter/flutter.git
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099b4eeada
Moved the frame buffer specific logic from IOSGLContext to IOSGLRenderTarget. use recording canvases for overlays Support platform view overlays with gl rendering. This also changes the overlay canvases (for both software and gl rendering) be recording canvases, and only rasterize them after finishing the paint traversal.
98 lines
2.5 KiB
C++
98 lines
2.5 KiB
C++
// Copyright 2013 The Flutter Authors. All rights reserved.
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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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#ifndef SHELL_GPU_GPU_SURFACE_GL_H_
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#define SHELL_GPU_GPU_SURFACE_GL_H_
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#include <functional>
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#include <memory>
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#include "flutter/flow/embedded_views.h"
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#include "flutter/fml/macros.h"
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#include "flutter/fml/memory/weak_ptr.h"
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#include "flutter/shell/common/surface.h"
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#include "third_party/skia/include/gpu/GrContext.h"
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namespace shell {
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class GPUSurfaceGLDelegate {
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public:
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virtual bool GLContextMakeCurrent() = 0;
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virtual bool GLContextClearCurrent() = 0;
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virtual bool GLContextPresent() = 0;
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virtual intptr_t GLContextFBO() const = 0;
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virtual bool GLContextFBOResetAfterPresent() const { return false; }
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virtual bool UseOffscreenSurface() const { return false; }
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virtual SkMatrix GLContextSurfaceTransformation() const {
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SkMatrix matrix;
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matrix.setIdentity();
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return matrix;
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}
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virtual flow::ExternalViewEmbedder* GetExternalViewEmbedder() {
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return nullptr;
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}
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using GLProcResolver =
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std::function<void* /* proc name */ (const char* /* proc address */)>;
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virtual GLProcResolver GetGLProcResolver() const { return nullptr; }
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};
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class GPUSurfaceGL : public Surface {
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public:
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GPUSurfaceGL(GPUSurfaceGLDelegate* delegate);
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// Creates a new GL surface reusing an existing GrContext.
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GPUSurfaceGL(sk_sp<GrContext> gr_context, GPUSurfaceGLDelegate* delegate);
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~GPUSurfaceGL() override;
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// |shell::Surface|
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bool IsValid() override;
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// |shell::Surface|
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std::unique_ptr<SurfaceFrame> AcquireFrame(const SkISize& size) override;
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// |shell::Surface|
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SkMatrix GetRootTransformation() const override;
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// |shell::Surface|
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GrContext* GetContext() override;
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// |shell::Surface|
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flow::ExternalViewEmbedder* GetExternalViewEmbedder() override;
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private:
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GPUSurfaceGLDelegate* delegate_;
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GPUSurfaceGLDelegate::GLProcResolver proc_resolver_;
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sk_sp<GrContext> context_;
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sk_sp<SkSurface> onscreen_surface_;
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sk_sp<SkSurface> offscreen_surface_;
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bool valid_ = false;
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fml::WeakPtrFactory<GPUSurfaceGL> weak_factory_;
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bool context_owner_;
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bool CreateOrUpdateSurfaces(const SkISize& size);
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sk_sp<SkSurface> AcquireRenderSurface(
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const SkISize& untransformed_size,
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const SkMatrix& root_surface_transformation);
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bool PresentSurface(SkCanvas* canvas);
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bool IsProcResolverOpenGLES();
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FML_DISALLOW_COPY_AND_ASSIGN(GPUSurfaceGL);
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};
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} // namespace shell
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#endif // SHELL_GPU_GPU_SURFACE_GL_H_
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