diff options
Diffstat (limited to 'src/utils/win')
-rw-r--r-- | src/utils/win/SkWGL.h | 20 | ||||
-rw-r--r-- | src/utils/win/SkWGL_win.cpp | 112 |
2 files changed, 70 insertions, 62 deletions
diff --git a/src/utils/win/SkWGL.h b/src/utils/win/SkWGL.h index 1fafd2fe52..315be24cd9 100644 --- a/src/utils/win/SkWGL.h +++ b/src/utils/win/SkWGL.h @@ -105,16 +105,16 @@ private: typedef int (WINAPI* ReleasePbufferDCProc)(HPBUFFER, HDC); typedef BOOL (WINAPI* DestroyPbufferProc)(HPBUFFER); - GetExtensionsStringProc fGetExtensionsString; - ChoosePixelFormatProc fChoosePixelFormat; - GetPixelFormatAttribfvProc fGetPixelFormatAttribfv; - GetPixelFormatAttribivProc fGetPixelFormatAttribiv; - CreateContextAttribsProc fCreateContextAttribs; - SwapIntervalProc fSwapInterval; - CreatePbufferProc fCreatePbuffer; - GetPbufferDCProc fGetPbufferDC; - ReleasePbufferDCProc fReleasePbufferDC; - DestroyPbufferProc fDestroyPbuffer; + static GetExtensionsStringProc fGetExtensionsString; + static ChoosePixelFormatProc fChoosePixelFormat; + static GetPixelFormatAttribfvProc fGetPixelFormatAttribfv; + static GetPixelFormatAttribivProc fGetPixelFormatAttribiv; + static CreateContextAttribsProc fCreateContextAttribs; + static SwapIntervalProc fSwapInterval; + static CreatePbufferProc fCreatePbuffer; + static GetPbufferDCProc fGetPbufferDC; + static ReleasePbufferDCProc fReleasePbufferDC; + static DestroyPbufferProc fDestroyPbuffer; }; enum SkWGLContextRequest { diff --git a/src/utils/win/SkWGL_win.cpp b/src/utils/win/SkWGL_win.cpp index cce7a56b75..cc95f4988d 100644 --- a/src/utils/win/SkWGL_win.cpp +++ b/src/utils/win/SkWGL_win.cpp @@ -10,6 +10,7 @@ #include "SkWGL.h" +#include "SkOnce.h" #include "SkTDArray.h" #include "SkTSearch.h" #include "SkTSort.h" @@ -231,58 +232,65 @@ void destroy_dummy_window(HWND dummy) { #define GET_PROC(NAME, SUFFIX) f##NAME = \ (NAME##Proc) wglGetProcAddress("wgl" #NAME #SUFFIX) -SkWGLExtensions::SkWGLExtensions() - : fGetExtensionsString(nullptr) - , fChoosePixelFormat(nullptr) - , fGetPixelFormatAttribfv(nullptr) - , fGetPixelFormatAttribiv(nullptr) - , fCreateContextAttribs(nullptr) - , fSwapInterval(nullptr) - , fCreatePbuffer(nullptr) - , fGetPbufferDC(nullptr) - , fReleasePbufferDC(nullptr) - , fDestroyPbuffer(nullptr) - { - HDC prevDC = wglGetCurrentDC(); - HGLRC prevGLRC = wglGetCurrentContext(); - PIXELFORMATDESCRIPTOR dummyPFD; - - ZeroMemory(&dummyPFD, sizeof(dummyPFD)); - dummyPFD.nSize = sizeof(dummyPFD); - dummyPFD.nVersion = 1; - dummyPFD.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL; - dummyPFD.iPixelType = PFD_TYPE_RGBA; - dummyPFD.cColorBits = 32; - dummyPFD.cDepthBits = 0; - dummyPFD.cStencilBits = 8; - dummyPFD.iLayerType = PFD_MAIN_PLANE; - HWND dummyWND = create_dummy_window(); - if (dummyWND) { - HDC dummyDC = GetDC(dummyWND); - int dummyFormat = ChoosePixelFormat(dummyDC, &dummyPFD); - SetPixelFormat(dummyDC, dummyFormat, &dummyPFD); - HGLRC dummyGLRC = wglCreateContext(dummyDC); - SkASSERT(dummyGLRC); - wglMakeCurrent(dummyDC, dummyGLRC); - - GET_PROC(GetExtensionsString, ARB); - GET_PROC(ChoosePixelFormat, ARB); - GET_PROC(GetPixelFormatAttribiv, ARB); - GET_PROC(GetPixelFormatAttribfv, ARB); - GET_PROC(CreateContextAttribs, ARB); - GET_PROC(SwapInterval, EXT); - GET_PROC(CreatePbuffer, ARB); - GET_PROC(GetPbufferDC, ARB); - GET_PROC(ReleasePbufferDC, ARB); - GET_PROC(DestroyPbuffer, ARB); - - wglMakeCurrent(dummyDC, nullptr); - wglDeleteContext(dummyGLRC); - destroy_dummy_window(dummyWND); - } +SkWGLExtensions::GetExtensionsStringProc SkWGLExtensions::fGetExtensionsString = nullptr; +SkWGLExtensions::ChoosePixelFormatProc SkWGLExtensions::fChoosePixelFormat = nullptr; +SkWGLExtensions::GetPixelFormatAttribfvProc SkWGLExtensions::fGetPixelFormatAttribfv = nullptr; +SkWGLExtensions::GetPixelFormatAttribivProc SkWGLExtensions::fGetPixelFormatAttribiv = nullptr; +SkWGLExtensions::CreateContextAttribsProc SkWGLExtensions::fCreateContextAttribs = nullptr; +SkWGLExtensions::SwapIntervalProc SkWGLExtensions::fSwapInterval = nullptr; +SkWGLExtensions::CreatePbufferProc SkWGLExtensions::fCreatePbuffer = nullptr; +SkWGLExtensions::GetPbufferDCProc SkWGLExtensions::fGetPbufferDC = nullptr; +SkWGLExtensions::ReleasePbufferDCProc SkWGLExtensions::fReleasePbufferDC = nullptr; +SkWGLExtensions::DestroyPbufferProc SkWGLExtensions::fDestroyPbuffer = nullptr; + +SkWGLExtensions::SkWGLExtensions() { + // We cache these function pointers once, and then reuse them. That's possibly incorrect if + // there are multiple GPUs, or if we intend to use these for rendering contexts of different + // pixel formats (where wglGetProcAddress is not guaranteed to return the same pointer). + static SkOnce once; + once([] { + HDC prevDC = wglGetCurrentDC(); + HGLRC prevGLRC = wglGetCurrentContext(); + + PIXELFORMATDESCRIPTOR dummyPFD; + + ZeroMemory(&dummyPFD, sizeof(dummyPFD)); + dummyPFD.nSize = sizeof(dummyPFD); + dummyPFD.nVersion = 1; + dummyPFD.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL; + dummyPFD.iPixelType = PFD_TYPE_RGBA; + dummyPFD.cColorBits = 32; + dummyPFD.cDepthBits = 0; + dummyPFD.cStencilBits = 8; + dummyPFD.iLayerType = PFD_MAIN_PLANE; + HWND dummyWND = create_dummy_window(); + if (dummyWND) { + HDC dummyDC = GetDC(dummyWND); + int dummyFormat = ChoosePixelFormat(dummyDC, &dummyPFD); + SetPixelFormat(dummyDC, dummyFormat, &dummyPFD); + HGLRC dummyGLRC = wglCreateContext(dummyDC); + SkASSERT(dummyGLRC); + wglMakeCurrent(dummyDC, dummyGLRC); + + GET_PROC(GetExtensionsString, ARB); + GET_PROC(ChoosePixelFormat, ARB); + GET_PROC(GetPixelFormatAttribiv, ARB); + GET_PROC(GetPixelFormatAttribfv, ARB); + GET_PROC(CreateContextAttribs, ARB); + GET_PROC(SwapInterval, EXT); + GET_PROC(CreatePbuffer, ARB); + GET_PROC(GetPbufferDC, ARB); + GET_PROC(ReleasePbufferDC, ARB); + GET_PROC(DestroyPbuffer, ARB); + + wglMakeCurrent(dummyDC, nullptr); + wglDeleteContext(dummyGLRC); + destroy_dummy_window(dummyWND); + } - wglMakeCurrent(prevDC, prevGLRC); + wglMakeCurrent(prevDC, prevGLRC); + }); } /////////////////////////////////////////////////////////////////////////////// @@ -334,8 +342,8 @@ static void get_pixel_formats_to_try(HDC dc, const SkWGLExtensions& extensions, extensions.choosePixelFormat(dc, iAttrs.begin(), fAttrs, 1, format, &num); } -static HGLRC create_gl_context(HDC dc, SkWGLExtensions extensions, SkWGLContextRequest contextType, - HGLRC shareContext) { +static HGLRC create_gl_context(HDC dc, const SkWGLExtensions& extensions, + SkWGLContextRequest contextType, HGLRC shareContext) { HDC prevDC = wglGetCurrentDC(); HGLRC prevGLRC = wglGetCurrentContext(); |