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Flutter Engine
The Flutter Engine
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Go to the source code of this file.
Classes | |
| class | SkWGLExtensions |
| class | SkWGLPbufferContext |
Macros | |
| #define | SK_WGL_DRAW_TO_WINDOW 0x2001 |
| #define | SK_WGL_ACCELERATION 0x2003 |
| #define | SK_WGL_SUPPORT_OPENGL 0x2010 |
| #define | SK_WGL_DOUBLE_BUFFER 0x2011 |
| #define | SK_WGL_COLOR_BITS 0x2014 |
| #define | SK_WGL_RED_BITS 0x2015 |
| #define | SK_WGL_GREEN_BITS 0x2017 |
| #define | SK_WGL_BLUE_BITS 0x2019 |
| #define | SK_WGL_ALPHA_BITS 0x201B |
| #define | SK_WGL_STENCIL_BITS 0x2023 |
| #define | SK_WGL_FULL_ACCELERATION 0x2027 |
| #define | SK_WGL_SAMPLE_BUFFERS 0x2041 |
| #define | SK_WGL_SAMPLES 0x2042 |
| #define | SK_WGL_CONTEXT_MAJOR_VERSION 0x2091 |
| #define | SK_WGL_CONTEXT_MINOR_VERSION 0x2092 |
| #define | SK_WGL_CONTEXT_LAYER_PLANE 0x2093 |
| #define | SK_WGL_CONTEXT_FLAGS 0x2094 |
| #define | SK_WGL_CONTEXT_PROFILE_MASK 0x9126 |
| #define | SK_WGL_CONTEXT_DEBUG_BIT 0x0001 |
| #define | SK_WGL_CONTEXT_FORWARD_COMPATIBLE_BIT 0x0002 |
| #define | SK_WGL_CONTEXT_CORE_PROFILE_BIT 0x00000001 |
| #define | SK_WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT 0x00000002 |
| #define | SK_WGL_CONTEXT_ES2_PROFILE_BIT 0x00000004 |
| #define | SK_ERROR_INVALID_VERSION 0x2095 |
| #define | SK_ERROR_INVALID_PROFILE 0x2096 |
Enumerations | |
| enum | SkWGLContextRequest { kGLPreferCoreProfile_SkWGLContextRequest , kGLPreferCompatibilityProfile_SkWGLContextRequest , kGLES_SkWGLContextRequest } |
Functions | |
| DECLARE_HANDLE (HPBUFFER) | |
| HGLRC | SkCreateWGLContext (HDC dc, int msaaSampleCount, bool deepColor, SkWGLContextRequest context, HGLRC shareContext=nullptr) |
| #define SK_WGL_DRAW_TO_WINDOW 0x2001 |
Working with WGL extensions can be a pain. Among the reasons is that you must have a GL context to get the proc addresses, but you want to use the procs to create a context in the first place. So you have to create a placeholder GL ctx to get the proc addresses.
This file helps by providing SkCreateWGLInterface(). It returns a struct of function pointers that it initializes. It also has a helper function to query for WGL extensions. It handles the fact that wglGetExtensionsString is itself an extension.
| enum SkWGLContextRequest |
Definition at line 119 of file SkWGL.h.
| DECLARE_HANDLE | ( | HPBUFFER | ) |
| HGLRC SkCreateWGLContext | ( | HDC | dc, |
| int | msaaSampleCount, | ||
| bool | deepColor, | ||
| SkWGLContextRequest | context, | ||
| HGLRC | shareContext = nullptr |
||
| ) |
Helper to create an OpenGL context for a DC using WGL. Configs with a sample count >= to msaaSampleCount are preferred but if none is available then a context with a lower sample count (including non-MSAA) will be created. If msaaSampleCount is 1 then this will fail if a non-msaa context cannot be created. If preferCoreProfile is true but a core profile cannot be created then a compatible profile context will be created.
1.9.8