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| 1 | |
| 2 /* | |
| 3 * Copyright 2011 Google Inc. | |
| 4 * | |
| 5 * Use of this source code is governed by a BSD-style license that can be | |
| 6 * found in the LICENSE file. | |
| 7 */ | |
| 8 | |
| 9 #include "SkRefCnt.h" | |
| 10 | |
| 11 #ifndef SkWGL_DEFINED | |
| 12 #define SkWGL_DEFINED | |
| 13 | |
| 14 /** | |
| 15 * Working with WGL extensions can be a pain. Among the reasons is that You must | |
| 16 * have a GL context to get the proc addresses, but you want to use the procs to | |
| 17 * create a context in the first place. So you have to create a dummy GL ctx to | |
| 18 * get the proc addresses. | |
| 19 * | |
| 20 * This file helps by providing SkCreateWGLInterface(). It returns a struct of | |
| 21 * function pointers that it initializes. It also has a helper function to query | |
| 22 * for WGL extensions. It handles the fact that wglGetExtensionsString is itself | |
| 23 * an extension. | |
| 24 */ | |
| 25 | |
| 26 #if !defined(WIN32_LEAN_AND_MEAN) | |
| 27 #define WIN32_LEAN_AND_MEAN | |
| 28 #define SK_LOCAL_LEAN_AND_MEAN | |
| 29 #endif | |
| 30 #include <windows.h> | |
| 31 #if defined(SK_LOCAL_LEAN_AND_MEAN) | |
| 32 #undef WIN32_LEAN_AND_MEAN | |
| 33 #undef SK_LOCAL_LEAN_AND_MEAN | |
| 34 #endif | |
| 35 | |
| 36 #define SK_WGL_DRAW_TO_WINDOW 0x2001 | |
| 37 #define SK_WGL_ACCELERATION 0x2003 | |
| 38 #define SK_WGL_SUPPORT_OPENGL 0x2010 | |
| 39 #define SK_WGL_DOUBLE_BUFFER 0x2011 | |
| 40 #define SK_WGL_COLOR_BITS 0x2014 | |
| 41 #define SK_WGL_ALPHA_BITS 0x201B | |
| 42 #define SK_WGL_STENCIL_BITS 0x2023 | |
| 43 #define SK_WGL_FULL_ACCELERATION 0x2027 | |
| 44 #define SK_WGL_SAMPLE_BUFFERS 0x2041 | |
| 45 #define SK_WGL_SAMPLES 0x2042 | |
| 46 #define SK_WGL_CONTEXT_MAJOR_VERSION 0x2091 | |
| 47 #define SK_WGL_CONTEXT_MINOR_VERSION 0x2092 | |
| 48 #define SK_WGL_CONTEXT_LAYER_PLANE 0x2093 | |
| 49 #define SK_WGL_CONTEXT_FLAGS 0x2094 | |
| 50 #define SK_WGL_CONTEXT_PROFILE_MASK 0x9126 | |
| 51 #define SK_WGL_CONTEXT_DEBUG_BIT 0x0001 | |
| 52 #define SK_WGL_CONTEXT_FORWARD_COMPATIBLE_BIT 0x0002 | |
| 53 #define SK_WGL_CONTEXT_CORE_PROFILE_BIT 0x00000001 | |
| 54 #define SK_WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT 0x00000002 | |
| 55 #define SK_WGL_CONTEXT_ES2_PROFILE_BIT 0x00000004 | |
| 56 #define SK_ERROR_INVALID_VERSION 0x2095 | |
| 57 #define SK_ERROR_INVALID_PROFILE 0x2096 | |
| 58 | |
| 59 DECLARE_HANDLE(HPBUFFER); | |
| 60 | |
| 61 class SkWGLExtensions { | |
| 62 public: | |
| 63 SkWGLExtensions(); | |
| 64 /** | |
| 65 * Determines if an extensions is available for a given DC. | |
| 66 * WGL_extensions_string is considered a prerequisite for all other | |
| 67 * extensions. It is necessary to check this before calling other class | |
| 68 * functions. | |
| 69 */ | |
| 70 bool hasExtension(HDC dc, const char* ext) const; | |
| 71 | |
| 72 const char* getExtensionsString(HDC hdc) const; | |
| 73 BOOL choosePixelFormat(HDC hdc, const int*, const FLOAT*, UINT, int*, UINT*)
const; | |
| 74 BOOL getPixelFormatAttribiv(HDC, int, int, UINT, const int*, int*) const; | |
| 75 BOOL getPixelFormatAttribfv(HDC hdc, int, int, UINT, const int*, FLOAT*) con
st; | |
| 76 HGLRC createContextAttribs(HDC, HGLRC, const int *) const; | |
| 77 | |
| 78 BOOL swapInterval(int interval) const; | |
| 79 | |
| 80 HPBUFFER createPbuffer(HDC, int , int, int, const int*) const; | |
| 81 HDC getPbufferDC(HPBUFFER) const; | |
| 82 int releasePbufferDC(HPBUFFER, HDC) const; | |
| 83 BOOL destroyPbuffer(HPBUFFER) const; | |
| 84 | |
| 85 /** | |
| 86 * WGL doesn't have precise rules for the ordering of formats returned | |
| 87 * by wglChoosePixelFormat. This function helps choose among the set of | |
| 88 * formats returned by wglChoosePixelFormat. The rules in decreasing | |
| 89 * priority are: | |
| 90 * * Choose formats with the smallest sample count that is >= | |
| 91 * desiredSampleCount (or the largest sample count if all formats have | |
| 92 * fewer samples than desiredSampleCount.) | |
| 93 * * Choose formats with the fewest color samples when coverage sampling | |
| 94 * is available. | |
| 95 * * If the above rules leave multiple formats, choose the one that | |
| 96 * appears first in the formats array parameter. | |
| 97 */ | |
| 98 int selectFormat(const int formats[], | |
| 99 int formatCount, | |
| 100 HDC dc, | |
| 101 int desiredSampleCount) const; | |
| 102 private: | |
| 103 typedef const char* (WINAPI *GetExtensionsStringProc)(HDC); | |
| 104 typedef BOOL (WINAPI *ChoosePixelFormatProc)(HDC, const int *, const FLOAT *
, UINT, int *, UINT *); | |
| 105 typedef BOOL (WINAPI *GetPixelFormatAttribivProc)(HDC, int, int, UINT, const
int*, int*); | |
| 106 typedef BOOL (WINAPI *GetPixelFormatAttribfvProc)(HDC, int, int, UINT, const
int*, FLOAT*); | |
| 107 typedef HGLRC (WINAPI *CreateContextAttribsProc)(HDC, HGLRC, const int *); | |
| 108 typedef BOOL (WINAPI* SwapIntervalProc)(int); | |
| 109 typedef HPBUFFER (WINAPI* CreatePbufferProc)(HDC, int , int, int, const int*
); | |
| 110 typedef HDC (WINAPI* GetPbufferDCProc)(HPBUFFER); | |
| 111 typedef int (WINAPI* ReleasePbufferDCProc)(HPBUFFER, HDC); | |
| 112 typedef BOOL (WINAPI* DestroyPbufferProc)(HPBUFFER); | |
| 113 | |
| 114 GetExtensionsStringProc fGetExtensionsString; | |
| 115 ChoosePixelFormatProc fChoosePixelFormat; | |
| 116 GetPixelFormatAttribfvProc fGetPixelFormatAttribfv; | |
| 117 GetPixelFormatAttribivProc fGetPixelFormatAttribiv; | |
| 118 CreateContextAttribsProc fCreateContextAttribs; | |
| 119 SwapIntervalProc fSwapInterval; | |
| 120 CreatePbufferProc fCreatePbuffer; | |
| 121 GetPbufferDCProc fGetPbufferDC; | |
| 122 ReleasePbufferDCProc fReleasePbufferDC; | |
| 123 DestroyPbufferProc fDestroyPbuffer; | |
| 124 }; | |
| 125 | |
| 126 enum SkWGLContextRequest { | |
| 127 /** Requests to create core profile context if possible, otherwise | |
| 128 compatibility profile. */ | |
| 129 kGLPreferCoreProfile_SkWGLContextRequest, | |
| 130 /** Requests to create compatibility profile context if possible, otherwise | |
| 131 core profile. */ | |
| 132 kGLPreferCompatibilityProfile_SkWGLContextRequest, | |
| 133 /** Requests to create GL ES profile context. */ | |
| 134 kGLES_SkWGLContextRequest | |
| 135 }; | |
| 136 /** | |
| 137 * Helper to create an OpenGL context for a DC using WGL. Configs with a sample
count >= to | |
| 138 * msaaSampleCount are preferred but if none is available then a context with a
lower sample count | |
| 139 * (including non-MSAA) will be created. If preferCoreProfile is true but a core
profile cannot be | |
| 140 * created then a compatible profile context will be created. | |
| 141 */ | |
| 142 HGLRC SkCreateWGLContext(HDC dc, int msaaSampleCount, SkWGLContextRequest contex
t); | |
| 143 | |
| 144 /** | |
| 145 * Helper class for creating a pbuffer context and deleting all the handles when
finished. This | |
| 146 * requires that a device context has been created. However, the pbuffer gets it
s own device | |
| 147 * context. The original device context can be released once the pbuffer context
is created. | |
| 148 */ | |
| 149 class SkWGLPbufferContext : public SkRefCnt { | |
| 150 public: | |
| 151 static SkWGLPbufferContext* Create(HDC parentDC, int msaaSampleCount, | |
| 152 SkWGLContextRequest contextType); | |
| 153 | |
| 154 virtual ~SkWGLPbufferContext(); | |
| 155 | |
| 156 HDC getDC() const { return fDC; } | |
| 157 HGLRC getGLRC() const { return fGLRC; } | |
| 158 | |
| 159 private: | |
| 160 SkWGLPbufferContext(HPBUFFER pbuffer, HDC dc, HGLRC glrc); | |
| 161 | |
| 162 HPBUFFER fPbuffer; | |
| 163 HDC fDC; | |
| 164 HGLRC fGLRC; | |
| 165 SkWGLExtensions fExtensions; | |
| 166 }; | |
| 167 | |
| 168 #endif | |
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Chromium Code Reviews
Issue 728823002:
Move WGL header from include to src (Closed)
Base URL: https://skia.googlesource.com/skia.git@master