mirror of
https://github.com/encounter/engine.git
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Dan Field
67 lines
2.7 KiB
C++
67 lines
2.7 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 FLUTTER_SHELL_GPU_GPU_SURFACE_GL_DELEGATE_H_
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#define FLUTTER_SHELL_GPU_GPU_SURFACE_GL_DELEGATE_H_
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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/shell/gpu/gpu_surface_delegate.h"
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#include "third_party/skia/include/core/SkMatrix.h"
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#include "third_party/skia/include/gpu/gl/GrGLInterface.h"
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namespace flutter {
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class GPUSurfaceGLDelegate : public GPUSurfaceDelegate {
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public:
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// Called to make the main GL context current on the current thread.
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virtual bool GLContextMakeCurrent() = 0;
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// Called to clear the current GL context on the thread. This may be called on
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// either the GPU or IO threads.
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virtual bool GLContextClearCurrent() = 0;
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// Called to present the main GL surface. This is only called for the main GL
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// context and not any of the contexts dedicated for IO.
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virtual bool GLContextPresent() = 0;
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// The ID of the main window bound framebuffer. Typically FBO0.
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virtual intptr_t GLContextFBO() const = 0;
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// The rendering subsystem assumes that the ID of the main window bound
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// framebuffer remains constant throughout. If this assumption in incorrect,
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// embedders are required to return true from this method. In such cases,
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// GLContextFBO() will be called again to acquire the new FBO ID for rendering
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// subsequent frames.
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virtual bool GLContextFBOResetAfterPresent() const;
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// Create an offscreen surface to render into before onscreen composition.
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virtual bool UseOffscreenSurface() const;
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// A transformation applied to the onscreen surface before the canvas is
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// flushed.
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virtual SkMatrix GLContextSurfaceTransformation() const;
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sk_sp<const GrGLInterface> GetGLInterface() const;
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// TODO(chinmaygarde): The presence of this method is to work around the fact
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// that not all platforms can accept a custom GL proc table. Migrate all
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// platforms to move GL proc resolution to the embedder and remove this
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// method.
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static sk_sp<const GrGLInterface> GetDefaultPlatformGLInterface();
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using GLProcResolver =
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std::function<void* /* proc name */ (const char* /* proc address */)>;
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// Provide a custom GL proc resolver. If no such resolver is present, Skia
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// will attempt to do GL proc address resolution on its own. Embedders that
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// have specific opinions on GL API selection or need to add their own
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// instrumentation to specific GL calls can specify custom GL functions
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// here.
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virtual GLProcResolver GetGLProcResolver() const;
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};
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} // namespace flutter
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#endif // FLUTTER_SHELL_GPU_GPU_SURFACE_GL_DELEGATE_H_
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