gwm17/glfw
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Make all WGL functions dynamically loaded

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This commit is contained in:
Camilla Berglund 2015-08-11 15:49:19 +02:00
parent 1343ef5915
commit 84b512c62c
3 changed files with 52 additions and 13 deletions
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1
README.md
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@ -87,6 +87,7 @@ GLFW bundles a number of dependencies in the `deps/` directory.
- [X11] Bugfix: The original video mode was not restored on iconification of
full screen windows
- [X11] Bugfix: `GLFW_ARROW_CURSOR` selected the wrong cursor image
- [WGL] Made all WGL functions dynamically loaded
- [WGL] Removed `GLFW_USE_DWM_SWAP_INTERVAL` compile-time option
- [WGL] Bugfix: Swap interval was ignored when DWM was enabled
- [GLX] Added dependency on `libdl` on systems where it provides `dlopen`

44
src/wgl_context.c
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@ -39,21 +39,21 @@ static void initWGLExtensions(_GLFWwindow* window)
// Functions for WGL_EXT_extension_string
// NOTE: These are needed by _glfwPlatformExtensionSupported
window->wgl.GetExtensionsStringEXT = (PFNWGLGETEXTENSIONSSTRINGEXTPROC)
wglGetProcAddress("wglGetExtensionsStringEXT");
_glfw_wglGetProcAddress("wglGetExtensionsStringEXT");
window->wgl.GetExtensionsStringARB = (PFNWGLGETEXTENSIONSSTRINGARBPROC)
wglGetProcAddress("wglGetExtensionsStringARB");
_glfw_wglGetProcAddress("wglGetExtensionsStringARB");
// Functions for WGL_ARB_create_context
window->wgl.CreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC)
wglGetProcAddress("wglCreateContextAttribsARB");
_glfw_wglGetProcAddress("wglCreateContextAttribsARB");
// Functions for WGL_EXT_swap_control
window->wgl.SwapIntervalEXT = (PFNWGLSWAPINTERVALEXTPROC)
wglGetProcAddress("wglSwapIntervalEXT");
_glfw_wglGetProcAddress("wglSwapIntervalEXT");
// Functions for WGL_ARB_pixel_format
window->wgl.GetPixelFormatAttribivARB = (PFNWGLGETPIXELFORMATATTRIBIVARBPROC)
wglGetProcAddress("wglGetPixelFormatAttribivARB");
_glfw_wglGetProcAddress("wglGetPixelFormatAttribivARB");
// This needs to include every extension used below except for
// WGL_ARB_extensions_string and WGL_EXT_extensions_string
@ -282,6 +282,28 @@ int _glfwInitContextAPI(void)
return GL_FALSE;
}
_glfw.wgl.opengl32.CreateContext = (WGLCREATECONTEXT_T)
GetProcAddress(_glfw.wgl.opengl32.instance, "wglCreateContext");
_glfw.wgl.opengl32.DeleteContext = (WGLDELETECONTEXT_T)
GetProcAddress(_glfw.wgl.opengl32.instance, "wglDeleteContext");
_glfw.wgl.opengl32.GetProcAddress = (WGLGETPROCADDRESS_T)
GetProcAddress(_glfw.wgl.opengl32.instance, "wglGetProcAddress");
_glfw.wgl.opengl32.MakeCurrent = (WGLMAKECURRENT_T)
GetProcAddress(_glfw.wgl.opengl32.instance, "wglMakeCurrent");
_glfw.wgl.opengl32.ShareLists = (WGLSHARELISTS_T)
GetProcAddress(_glfw.wgl.opengl32.instance, "wglShareLists");
if (!_glfw.wgl.opengl32.CreateContext ||
!_glfw.wgl.opengl32.DeleteContext ||
!_glfw.wgl.opengl32.GetProcAddress ||
!_glfw.wgl.opengl32.MakeCurrent ||
!_glfw.wgl.opengl32.ShareLists)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"WGL: Failed to load opengl32 functions");
return GL_FALSE;
}
return GL_TRUE;
}
@ -426,7 +448,7 @@ int _glfwCreateContext(_GLFWwindow* window,
}
else
{
window->wgl.context = wglCreateContext(window->wgl.dc);
window->wgl.context = _glfw_wglCreateContext(window->wgl.dc);
if (!window->wgl.context)
{
_glfwInputError(GLFW_VERSION_UNAVAILABLE,
@ -436,7 +458,7 @@ int _glfwCreateContext(_GLFWwindow* window,
if (share)
{
if (!wglShareLists(share, window->wgl.context))
if (!_glfw_wglShareLists(share, window->wgl.context))
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"WGL: Failed to enable sharing with specified OpenGL context");
@ -459,7 +481,7 @@ void _glfwDestroyContext(_GLFWwindow* window)
{
if (window->wgl.context)
{
wglDeleteContext(window->wgl.context);
_glfw_wglDeleteContext(window->wgl.context);
window->wgl.context = NULL;
}
@ -568,9 +590,9 @@ int _glfwAnalyzeContext(const _GLFWwindow* window,
void _glfwPlatformMakeContextCurrent(_GLFWwindow* window)
{
if (window)
wglMakeCurrent(window->wgl.dc, window->wgl.context);
_glfw_wglMakeCurrent(window->wgl.dc, window->wgl.context);
else
wglMakeCurrent(NULL, NULL);
_glfw_wglMakeCurrent(NULL, NULL);
_glfwSetContextTLS(window);
}
@ -634,7 +656,7 @@ int _glfwPlatformExtensionSupported(const char* extension)
GLFWglproc _glfwPlatformGetProcAddress(const char* procname)
{
const GLFWglproc proc = (GLFWglproc) wglGetProcAddress(procname);
const GLFWglproc proc = (GLFWglproc) _glfw_wglGetProcAddress(procname);
if (proc)
return proc;

18
src/wgl_context.h
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@ -33,6 +33,18 @@
// extensions and not all operating systems come with an up-to-date version
#include "../deps/GL/wglext.h"
// opengl32.dll function pointer typedefs
typedef HGLRC (WINAPI * WGLCREATECONTEXT_T)(HDC);
typedef BOOL (WINAPI * WGLDELETECONTEXT_T)(HGLRC);
typedef PROC (WINAPI * WGLGETPROCADDRESS_T)(LPCSTR);
typedef BOOL (WINAPI * WGLMAKECURRENT_T)(HDC,HGLRC);
typedef BOOL (WINAPI * WGLSHARELISTS_T)(HGLRC,HGLRC);
#define _glfw_wglCreateContext _glfw.wgl.opengl32.CreateContext
#define _glfw_wglDeleteContext _glfw.wgl.opengl32.DeleteContext
#define _glfw_wglGetProcAddress _glfw.wgl.opengl32.GetProcAddress
#define _glfw_wglMakeCurrent _glfw.wgl.opengl32.MakeCurrent
#define _glfw_wglShareLists _glfw.wgl.opengl32.ShareLists
#define _GLFW_PLATFORM_FBCONFIG int wgl
#define _GLFW_PLATFORM_CONTEXT_STATE _GLFWcontextWGL wgl
#define _GLFW_PLATFORM_LIBRARY_CONTEXT_STATE _GLFWlibraryWGL wgl
@ -70,9 +82,13 @@ typedef struct _GLFWcontextWGL
//
typedef struct _GLFWlibraryWGL
{
// opengl32.dll (for glfwGetProcAddress)
struct {
HINSTANCE instance;
WGLCREATECONTEXT_T CreateContext;
WGLDELETECONTEXT_T DeleteContext;
WGLGETPROCADDRESS_T GetProcAddress;
WGLMAKECURRENT_T MakeCurrent;
WGLSHARELISTS_T ShareLists;
} opengl32;
} _GLFWlibraryWGL;