bsalomon@google.com | bd7c641 | 2011-12-01 16:34:28 +0000 | [diff] [blame] | 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 | |
bsalomon@google.com | eedef25 | 2011-12-01 16:50:24 +0000 | [diff] [blame^] | 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 |
bsalomon@google.com | bd7c641 | 2011-12-01 16:34:28 +0000 | [diff] [blame] | 58 | |
| 59 | class SkWGLExtensions { |
| 60 | public: |
| 61 | SkWGLExtensions(); |
| 62 | /** |
| 63 | * Determines if an extensions is available for a given DC. |
bsalomon@google.com | eedef25 | 2011-12-01 16:50:24 +0000 | [diff] [blame^] | 64 | * WGL_extensions_string is considered a prerequisite for all other |
bsalomon@google.com | bd7c641 | 2011-12-01 16:34:28 +0000 | [diff] [blame] | 65 | * extensions. It is necessary to check this before calling other class |
| 66 | * functions. |
| 67 | */ |
| 68 | bool hasExtension(HDC dc, const char* ext) const; |
| 69 | |
| 70 | const char* getExtensionsString(HDC hdc) const; |
| 71 | BOOL choosePixelFormat(HDC hdc, const int*, const FLOAT*, UINT, int*, UINT*) const; |
| 72 | BOOL getPixelFormatAttribiv(HDC, int, int, UINT, const int*, int*) const; |
| 73 | BOOL getPixelFormatAttribfv(HDC hdc, int, int, UINT, const int*, FLOAT*) const; |
| 74 | HGLRC createContextAttribs(HDC, HGLRC, const int *) const; |
| 75 | |
| 76 | private: |
| 77 | typedef const char* (WINAPI *GetExtensionsStringProc)(HDC hdc); |
| 78 | typedef BOOL (WINAPI *ChoosePixelFormatProc)(HDC hdc, const int *, const FLOAT *, UINT, int *, UINT *); |
| 79 | typedef BOOL (WINAPI *GetPixelFormatAttribivProc)(HDC, int, int, UINT, const int*, int*); |
| 80 | typedef BOOL (WINAPI *GetPixelFormatAttribfvProc)(HDC hdc, int, int, UINT, const int*, FLOAT*); |
| 81 | typedef HGLRC (WINAPI *CreateContextAttribsProc)(HDC hDC, HGLRC, const int *); |
| 82 | |
| 83 | GetExtensionsStringProc fGetExtensionsString; |
| 84 | ChoosePixelFormatProc fChoosePixelFormat; |
| 85 | GetPixelFormatAttribfvProc fGetPixelFormatAttribfv; |
| 86 | GetPixelFormatAttribivProc fGetPixelFormatAttribiv; |
| 87 | CreateContextAttribsProc fCreateContextAttribs; |
| 88 | }; |
| 89 | |
| 90 | #endif |