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115 lines
3.8 KiB
C++
115 lines
3.8 KiB
C++
// Copyright (c) 2012 The Chromium 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 UI_GL_GL_IMPLEMENTATION_H_
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#define UI_GL_GL_IMPLEMENTATION_H_
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#include <string>
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#include <vector>
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#include "base/native_library.h"
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#include "build/build_config.h"
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#include "ui/gl/gl_export.h"
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#include "ui/gl/gl_switches.h"
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namespace gfx {
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class GLContext;
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// The GL implementation currently in use.
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enum GLImplementation {
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kGLImplementationNone,
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kGLImplementationDesktopGL,
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kGLImplementationOSMesaGL,
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kGLImplementationAppleGL,
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kGLImplementationEGLGLES2,
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kGLImplementationMockGL
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};
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struct GL_EXPORT GLWindowSystemBindingInfo {
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GLWindowSystemBindingInfo();
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std::string vendor;
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std::string version;
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std::string extensions;
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bool direct_rendering;
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};
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void GetAllowedGLImplementations(std::vector<GLImplementation>* impls);
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typedef void* (*GLGetProcAddressProc)(const char* name);
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// Initialize a particular GL implementation.
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GL_EXPORT bool InitializeStaticGLBindings(GLImplementation implementation);
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// Initialize function bindings that depend on the context for a GL
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// implementation.
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GL_EXPORT bool InitializeDynamicGLBindings(GLImplementation implementation,
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GLContext* context);
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// Initialize Debug logging wrappers for GL bindings.
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void InitializeDebugGLBindings();
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// Initialize stub methods for drawing operations in the GL bindings. The
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// null draw bindings default to enabled, so that draw operations do nothing.
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void InitializeNullDrawGLBindings();
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// TODO(danakj): Remove this when all test suites are using null-draw.
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GL_EXPORT bool HasInitializedNullDrawGLBindings();
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// Once initialized, instantiating this turns the stub methods for drawing
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// operations off allowing drawing will occur while the object is alive.
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class GL_EXPORT DisableNullDrawGLBindings {
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public:
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DisableNullDrawGLBindings();
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~DisableNullDrawGLBindings();
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private:
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bool initial_enabled_;
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};
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GL_EXPORT void ClearGLBindings();
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// Set the current GL implementation.
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GL_EXPORT void SetGLImplementation(GLImplementation implementation);
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// Get the current GL implementation.
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GL_EXPORT GLImplementation GetGLImplementation();
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// Does the underlying GL support all features from Desktop GL 2.0 that were
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// removed from the ES 2.0 spec without requiring specific extension strings.
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GL_EXPORT bool HasDesktopGLFeatures();
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// Get the GL implementation with a given name.
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GLImplementation GetNamedGLImplementation(const std::string& name);
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// Get the name of a GL implementation.
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const char* GetGLImplementationName(GLImplementation implementation);
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// Add a native library to those searched for GL entry points.
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void AddGLNativeLibrary(base::NativeLibrary library);
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// Unloads all native libraries.
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void UnloadGLNativeLibraries();
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// Set an additional function that will be called to find GL entry points.
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// Exported so that tests may set the function used in the mock implementation.
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GL_EXPORT void SetGLGetProcAddressProc(GLGetProcAddressProc proc);
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// Find an entry point in the current GL implementation. Note that the function
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// may return a non-null pointer to something else than the GL function if an
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// unsupported function is queried. Spec-compliant eglGetProcAddress and
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// glxGetProcAddress are allowed to return garbage for unsupported functions,
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// and when querying functions from the EGL library supplied by Android, it may
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// return a function that prints a log message about the function being
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// unsupported.
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void* GetGLProcAddress(const char* name);
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// Return information about the GL window system binding implementation (e.g.,
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// EGL, GLX, WGL). Returns true if the information was retrieved successfully.
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GL_EXPORT bool GetGLWindowSystemBindingInfo(GLWindowSystemBindingInfo* info);
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} // namespace gfx
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#endif // UI_GL_GL_IMPLEMENTATION_H_
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