91 lines
4.0 KiB
C
91 lines
4.0 KiB
C
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/*
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* Copyright 2011 Google Inc.
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*
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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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*/
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#include "SkRefCnt.h"
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#ifndef SkWGL_DEFINED
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#define SkWGL_DEFINED
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/**
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* Working with WGL extensions can be a pain. Among the reasons is that You must
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* have a GL context to get the proc addresses, but you want to use the procs to
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* create a context in the first place. So you have to create a dummy GL ctx to
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* get the proc addresses.
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*
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* This file helps by providing SkCreateWGLInterface(). It returns a struct of
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* function pointers that it initializes. It also has a helper function to query
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* for WGL extensions. It handles the fact that wglGetExtensionsString is itself
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* an extension.
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*/
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#if !defined(WIN32_LEAN_AND_MEAN)
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#define WIN32_LEAN_AND_MEAN
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#define SK_LOCAL_LEAN_AND_MEAN
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#endif
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#include <Windows.h>
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#if defined(SK_LOCAL_LEAN_AND_MEAN)
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#undef WIN32_LEAN_AND_MEAN
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#undef SK_LOCAL_LEAN_AND_MEAN
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#endif
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#define SK_WGL_DRAW_TO_WINDOW_ARB 0x2001
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#define SK_WGL_ACCELERATION_ARB 0x2003
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#define SK_WGL_SUPPORT_OPENGL_ARB 0x2010
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#define SK_WGL_DOUBLE_BUFFER_ARB 0x2011
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#define SK_WGL_COLOR_BITS_ARB 0x2014
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#define SK_WGL_ALPHA_BITS_ARB 0x201B
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#define SK_WGL_STENCIL_BITS_ARB 0x2023
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#define SK_WGL_FULL_ACCELERATION_ARB 0x2027
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#define SK_WGL_SAMPLE_BUFFERS_ARB 0x2041
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#define SK_WGL_SAMPLES_ARB 0x2042
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#define SK_WGL_CONTEXT_MAJOR_VERSION_ARB 0x2091
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#define SK_WGL_CONTEXT_MINOR_VERSION_ARB 0x2092
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#define SK_WGL_CONTEXT_LAYER_PLANE_ARB 0x2093
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#define SK_WGL_CONTEXT_FLAGS_ARB 0x2094
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#define SK_WGL_CONTEXT_PROFILE_MASK_ARB 0x9126
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#define SK_WGL_CONTEXT_DEBUG_BIT_ARB 0x0001
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#define SK_WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x0002
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#define SK_WGL_CONTEXT_CORE_PROFILE_BIT_ARB 0x00000001
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#define SK_WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB 0x00000002
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#define SK_WGL_CONTEXT_ES2_PROFILE_BIT_EXT 0x00000004
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#define SK_ERROR_INVALID_VERSION_ARB 0x2095
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#define SK_ERROR_INVALID_PROFILE_ARB 0x2096
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class SkWGLExtensions {
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public:
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SkWGLExtensions();
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/**
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* Determines if an extensions is available for a given DC.
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* WGL_ARB_extensions_string is considered a prerequisite for all other
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* extensions. It is necessary to check this before calling other class
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* functions.
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*/
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bool hasExtension(HDC dc, const char* ext) const;
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const char* getExtensionsString(HDC hdc) const;
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BOOL choosePixelFormat(HDC hdc, const int*, const FLOAT*, UINT, int*, UINT*) const;
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BOOL getPixelFormatAttribiv(HDC, int, int, UINT, const int*, int*) const;
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BOOL getPixelFormatAttribfv(HDC hdc, int, int, UINT, const int*, FLOAT*) const;
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HGLRC createContextAttribs(HDC, HGLRC, const int *) const;
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private:
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typedef const char* (WINAPI *GetExtensionsStringProc)(HDC hdc);
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typedef BOOL (WINAPI *ChoosePixelFormatProc)(HDC hdc, const int *, const FLOAT *, UINT, int *, UINT *);
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typedef BOOL (WINAPI *GetPixelFormatAttribivProc)(HDC, int, int, UINT, const int*, int*);
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typedef BOOL (WINAPI *GetPixelFormatAttribfvProc)(HDC hdc, int, int, UINT, const int*, FLOAT*);
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typedef HGLRC (WINAPI *CreateContextAttribsProc)(HDC hDC, HGLRC, const int *);
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GetExtensionsStringProc fGetExtensionsString;
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ChoosePixelFormatProc fChoosePixelFormat;
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GetPixelFormatAttribfvProc fGetPixelFormatAttribfv;
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GetPixelFormatAttribivProc fGetPixelFormatAttribiv;
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CreateContextAttribsProc fCreateContextAttribs;
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};
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#endif
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