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Improved User Context Win32 implementation

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_glfwCreateContextWGL and _glfwPlatformCreateUserContext now use  new function _glfwCreateContextForDCWGL.
This commit is contained in:
Doug Binks 2020-07-12 12:21:18 +01:00
parent a08bfd9891
commit 0ae4eb4d26
2 changed files with 64 additions and 50 deletions
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112
src/wgl_context.c
View File

@ -538,46 +538,17 @@ void _glfwTerminateWGL(void)
attribs[index++] = v; \
}
// Create the OpenGL or OpenGL ES context
// Create the OpenGL or OpenGL ES context for the given HDC
//
GLFWbool _glfwCreateContextWGL(_GLFWwindow* window,
const _GLFWctxconfig* ctxconfig,
const _GLFWfbconfig* fbconfig)
GLFWbool _glfwCreateContextForDCWGL(HDC dc, const _GLFWctxconfig* ctxconfig, HGLRC* context)
{
int attribs[40];
int pixelFormat;
PIXELFORMATDESCRIPTOR pfd;
HGLRC share = NULL;
*context = NULL;
if (ctxconfig->share)
share = ctxconfig->share->context.wgl.handle;
window->context.wgl.dc = GetDC(window->win32.handle);
if (!window->context.wgl.dc)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"WGL: Failed to retrieve DC for window");
return GLFW_FALSE;
}
pixelFormat = choosePixelFormat(window, ctxconfig, fbconfig);
if (!pixelFormat)
return GLFW_FALSE;
if (!DescribePixelFormat(window->context.wgl.dc,
pixelFormat, sizeof(pfd), &pfd))
{
_glfwInputErrorWin32(GLFW_PLATFORM_ERROR,
"WGL: Failed to retrieve PFD for selected pixel format");
return GLFW_FALSE;
}
if (!SetPixelFormat(window->context.wgl.dc, pixelFormat, &pfd))
{
_glfwInputErrorWin32(GLFW_PLATFORM_ERROR,
"WGL: Failed to set selected pixel format");
return GLFW_FALSE;
}
if (ctxconfig->client == GLFW_OPENGL_API)
{
@ -692,9 +663,9 @@ GLFWbool _glfwCreateContextWGL(_GLFWwindow* window,
setAttrib(0, 0);
window->context.wgl.handle =
wglCreateContextAttribsARB(window->context.wgl.dc, share, attribs);
if (!window->context.wgl.handle)
*context =
wglCreateContextAttribsARB(dc, share, attribs);
if (!(*context))
{
const DWORD error = GetLastError();
@ -744,8 +715,8 @@ GLFWbool _glfwCreateContextWGL(_GLFWwindow* window,
}
else
{
window->context.wgl.handle = wglCreateContext(window->context.wgl.dc);
if (!window->context.wgl.handle)
*context = wglCreateContext(dc);
if (!(*context) )
{
_glfwInputErrorWin32(GLFW_VERSION_UNAVAILABLE,
"WGL: Failed to create OpenGL context");
@ -754,7 +725,7 @@ GLFWbool _glfwCreateContextWGL(_GLFWwindow* window,
if (share)
{
if (!wglShareLists(share, window->context.wgl.handle))
if (!wglShareLists(share, *context))
{
_glfwInputErrorWin32(GLFW_PLATFORM_ERROR,
"WGL: Failed to enable sharing with specified OpenGL context");
@ -763,6 +734,50 @@ GLFWbool _glfwCreateContextWGL(_GLFWwindow* window,
}
}
return GLFW_TRUE;
}
// Create the OpenGL or OpenGL ES context
//
GLFWbool _glfwCreateContextWGL(_GLFWwindow* window,
const _GLFWctxconfig* ctxconfig,
const _GLFWfbconfig* fbconfig)
{
int pixelFormat;
PIXELFORMATDESCRIPTOR pfd;
window->context.wgl.dc = GetDC(window->win32.handle);
if (!window->context.wgl.dc)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"WGL: Failed to retrieve DC for window");
return GLFW_FALSE;
}
pixelFormat = choosePixelFormat(window, ctxconfig, fbconfig);
if (!pixelFormat)
return GLFW_FALSE;
if (!DescribePixelFormat(window->context.wgl.dc,
pixelFormat, sizeof(pfd), &pfd))
{
_glfwInputErrorWin32(GLFW_PLATFORM_ERROR,
"WGL: Failed to retrieve PFD for selected pixel format");
return GLFW_FALSE;
}
if (!SetPixelFormat(window->context.wgl.dc, pixelFormat, &pfd))
{
_glfwInputErrorWin32(GLFW_PLATFORM_ERROR,
"WGL: Failed to set selected pixel format");
return GLFW_FALSE;
}
if(!_glfwCreateContextForDCWGL( window->context.wgl.dc, ctxconfig, &window->context.wgl.handle ))
{
return GLFW_FALSE;
}
window->context.makeCurrent = makeContextCurrentWGL;
window->context.swapBuffers = swapBuffersWGL;
window->context.swapInterval = swapIntervalWGL;
@ -783,25 +798,22 @@ GLFWbool _glfwCreateContextWGL(_GLFWwindow* window,
_GLFWusercontext* _glfwPlatformCreateUserContext(_GLFWwindow* window)
{
_GLFWusercontext* context;
_GLFWctxconfig ctxconfig;
context = calloc(1, sizeof(_GLFWusercontext));
context->handle = wglCreateContext(window->context.wgl.dc);
context->window = window;
if (!context->handle)
{
_glfwInputErrorWin32(GLFW_VERSION_UNAVAILABLE,
"WGL: Failed to create user OpenGL context");
free(context);
return GLFW_FALSE;
}
if (!wglShareLists(window->context.wgl.handle,context->handle))
ctxconfig = _glfw.hints.context;
ctxconfig.share = window;
if (!_glfwCreateContextForDCWGL(window->context.wgl.dc, &ctxconfig, &context->handle))
{
_glfwInputErrorWin32(GLFW_PLATFORM_ERROR,
"WGL: Failed to enable sharing with window OpenGL context and user context");
"WGL: Failed to create user OpenGL context");
free(context);
return GLFW_FALSE;
return NULL;
}
return context;
}

2
src/wgl_context.h
View File

@ -151,6 +151,8 @@ typedef struct _GLFWlibraryWGL
} _GLFWlibraryWGL;
// WGL-specific user context data
//
typedef struct _GLFWusercontext
{
_GLFWwindow* window;