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Moved WGL context logic into OpenGL module.

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This commit is contained in:
Camilla Berglund 2012-07-31 22:48:28 +02:00
parent 6c37c84d91
commit fc74a5533e
3 changed files with 594 additions and 563 deletions
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582
src/win32_opengl.c
View File

@ -31,6 +31,588 @@
#include "internal.h"
//========================================================================
// Initialize WGL-specific extensions
// This function is called once before initial context creation, i.e. before
// any WGL extensions could be present. This is done in order to have both
// extension variable clearing and loading in the same place, hopefully
// decreasing the possibility of forgetting to add one without the other.
//========================================================================
static void initWGLExtensions(_GLFWwindow* window)
{
// This needs to include every function pointer loaded below
window->WGL.SwapIntervalEXT = NULL;
window->WGL.GetPixelFormatAttribivARB = NULL;
window->WGL.GetExtensionsStringARB = NULL;
window->WGL.GetExtensionsStringEXT = NULL;
window->WGL.CreateContextAttribsARB = NULL;
// This needs to include every extension used below except for
// WGL_ARB_extensions_string and WGL_EXT_extensions_string
window->WGL.ARB_multisample = GL_FALSE;
window->WGL.ARB_create_context = GL_FALSE;
window->WGL.ARB_create_context_profile = GL_FALSE;
window->WGL.EXT_create_context_es2_profile = GL_FALSE;
window->WGL.ARB_create_context_robustness = GL_FALSE;
window->WGL.EXT_swap_control = GL_FALSE;
window->WGL.ARB_pixel_format = GL_FALSE;
window->WGL.GetExtensionsStringEXT = (PFNWGLGETEXTENSIONSSTRINGEXTPROC)
wglGetProcAddress("wglGetExtensionsStringEXT");
if (!window->WGL.GetExtensionsStringEXT)
{
window->WGL.GetExtensionsStringARB = (PFNWGLGETEXTENSIONSSTRINGARBPROC)
wglGetProcAddress("wglGetExtensionsStringARB");
if (!window->WGL.GetExtensionsStringARB)
return;
}
if (_glfwPlatformExtensionSupported("WGL_ARB_multisample"))
window->WGL.ARB_multisample = GL_TRUE;
if (_glfwPlatformExtensionSupported("WGL_ARB_create_context"))
{
window->WGL.CreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC)
wglGetProcAddress("wglCreateContextAttribsARB");
if (window->WGL.CreateContextAttribsARB)
window->WGL.ARB_create_context = GL_TRUE;
}
if (window->WGL.ARB_create_context)
{
if (_glfwPlatformExtensionSupported("WGL_ARB_create_context_profile"))
window->WGL.ARB_create_context_profile = GL_TRUE;
}
if (window->WGL.ARB_create_context &&
window->WGL.ARB_create_context_profile)
{
if (_glfwPlatformExtensionSupported("WGL_EXT_create_context_es2_profile"))
window->WGL.EXT_create_context_es2_profile = GL_TRUE;
}
if (window->WGL.ARB_create_context)
{
if (_glfwPlatformExtensionSupported("WGL_ARB_create_context_robustness"))
window->WGL.ARB_create_context_robustness = GL_TRUE;
}
if (_glfwPlatformExtensionSupported("WGL_EXT_swap_control"))
{
window->WGL.SwapIntervalEXT = (PFNWGLSWAPINTERVALEXTPROC)
wglGetProcAddress("wglSwapIntervalEXT");
if (window->WGL.SwapIntervalEXT)
window->WGL.EXT_swap_control = GL_TRUE;
}
if (_glfwPlatformExtensionSupported("WGL_ARB_pixel_format"))
{
window->WGL.GetPixelFormatAttribivARB = (PFNWGLGETPIXELFORMATATTRIBIVARBPROC)
wglGetProcAddress("wglGetPixelFormatAttribivARB");
if (window->WGL.GetPixelFormatAttribivARB)
window->WGL.ARB_pixel_format = GL_TRUE;
}
}
//========================================================================
// Returns the specified attribute of the specified pixel format
// NOTE: Do not call this unless we have found WGL_ARB_pixel_format
//========================================================================
static int getPixelFormatAttrib(_GLFWwindow* window, int pixelFormat, int attrib)
{
int value = 0;
if (!window->WGL.GetPixelFormatAttribivARB(window->WGL.DC,
pixelFormat,
0, 1, &attrib, &value))
{
// NOTE: We should probably handle this error somehow
return 0;
}
return value;
}
//========================================================================
// Return a list of available and usable framebuffer configs
//========================================================================
static _GLFWfbconfig* getFBConfigs(_GLFWwindow* window, unsigned int* found)
{
_GLFWfbconfig* fbconfigs;
PIXELFORMATDESCRIPTOR pfd;
int i, available;
*found = 0;
if (window->WGL.ARB_pixel_format)
{
available = getPixelFormatAttrib(window,
1,
WGL_NUMBER_PIXEL_FORMATS_ARB);
}
else
{
available = DescribePixelFormat(window->WGL.DC,
1,
sizeof(PIXELFORMATDESCRIPTOR),
NULL);
}
if (!available)
{
_glfwSetError(GLFW_OPENGL_UNAVAILABLE, "Win32/WGL: No pixel formats found");
return NULL;
}
fbconfigs = (_GLFWfbconfig*) malloc(sizeof(_GLFWfbconfig) * available);
if (!fbconfigs)
{
_glfwSetError(GLFW_OUT_OF_MEMORY,
"Win32/WGL: Failed to allocate _GLFWfbconfig array");
return NULL;
}
for (i = 1; i <= available; i++)
{
_GLFWfbconfig* f = fbconfigs + *found;
if (window->WGL.ARB_pixel_format)
{
// Get pixel format attributes through WGL_ARB_pixel_format
if (!getPixelFormatAttrib(window, i, WGL_SUPPORT_OPENGL_ARB) ||
!getPixelFormatAttrib(window, i, WGL_DRAW_TO_WINDOW_ARB) ||
!getPixelFormatAttrib(window, i, WGL_DOUBLE_BUFFER_ARB))
{
continue;
}
if (getPixelFormatAttrib(window, i, WGL_PIXEL_TYPE_ARB) !=
WGL_TYPE_RGBA_ARB)
{
continue;
}
if (getPixelFormatAttrib(window, i, WGL_ACCELERATION_ARB) ==
WGL_NO_ACCELERATION_ARB)
{
continue;
}
f->redBits = getPixelFormatAttrib(window, i, WGL_RED_BITS_ARB);
f->greenBits = getPixelFormatAttrib(window, i, WGL_GREEN_BITS_ARB);
f->blueBits = getPixelFormatAttrib(window, i, WGL_BLUE_BITS_ARB);
f->alphaBits = getPixelFormatAttrib(window, i, WGL_ALPHA_BITS_ARB);
f->depthBits = getPixelFormatAttrib(window, i, WGL_DEPTH_BITS_ARB);
f->stencilBits = getPixelFormatAttrib(window, i, WGL_STENCIL_BITS_ARB);
f->accumRedBits = getPixelFormatAttrib(window, i, WGL_ACCUM_RED_BITS_ARB);
f->accumGreenBits = getPixelFormatAttrib(window, i, WGL_ACCUM_GREEN_BITS_ARB);
f->accumBlueBits = getPixelFormatAttrib(window, i, WGL_ACCUM_BLUE_BITS_ARB);
f->accumAlphaBits = getPixelFormatAttrib(window, i, WGL_ACCUM_ALPHA_BITS_ARB);
f->auxBuffers = getPixelFormatAttrib(window, i, WGL_AUX_BUFFERS_ARB);
f->stereo = getPixelFormatAttrib(window, i, WGL_STEREO_ARB);
if (window->WGL.ARB_multisample)
f->samples = getPixelFormatAttrib(window, i, WGL_SAMPLES_ARB);
else
f->samples = 0;
}
else
{
// Get pixel format attributes through old-fashioned PFDs
if (!DescribePixelFormat(window->WGL.DC,
i,
sizeof(PIXELFORMATDESCRIPTOR),
&pfd))
{
continue;
}
if (!(pfd.dwFlags & PFD_DRAW_TO_WINDOW) ||
!(pfd.dwFlags & PFD_SUPPORT_OPENGL) ||
!(pfd.dwFlags & PFD_DOUBLEBUFFER))
{
continue;
}
if (!(pfd.dwFlags & PFD_GENERIC_ACCELERATED) &&
(pfd.dwFlags & PFD_GENERIC_FORMAT))
{
continue;
}
if (pfd.iPixelType != PFD_TYPE_RGBA)
continue;
f->redBits = pfd.cRedBits;
f->greenBits = pfd.cGreenBits;
f->blueBits = pfd.cBlueBits;
f->alphaBits = pfd.cAlphaBits;
f->depthBits = pfd.cDepthBits;
f->stencilBits = pfd.cStencilBits;
f->accumRedBits = pfd.cAccumRedBits;
f->accumGreenBits = pfd.cAccumGreenBits;
f->accumBlueBits = pfd.cAccumBlueBits;
f->accumAlphaBits = pfd.cAccumAlphaBits;
f->auxBuffers = pfd.cAuxBuffers;
f->stereo = (pfd.dwFlags & PFD_STEREO) ? GL_TRUE : GL_FALSE;
// PFD pixel formats do not support FSAA
f->samples = 0;
}
f->platformID = i;
(*found)++;
}
if (*found == 0)
{
free(fbconfigs);
return NULL;
}
return fbconfigs;
}
//========================================================================
// Read back framebuffer parameters from the context
//========================================================================
static void refreshContextParams(_GLFWwindow* window, int pixelFormat)
{
PIXELFORMATDESCRIPTOR pfd;
if (window->WGL.ARB_pixel_format)
{
if (getPixelFormatAttrib(window, pixelFormat, WGL_ACCELERATION_ARB) !=
WGL_NO_ACCELERATION_ARB)
{
window->accelerated = GL_TRUE;
}
else
window->accelerated = GL_FALSE;
window->redBits =
getPixelFormatAttrib(window, pixelFormat, WGL_RED_BITS_ARB);
window->greenBits =
getPixelFormatAttrib(window, pixelFormat, WGL_GREEN_BITS_ARB);
window->blueBits =
getPixelFormatAttrib(window, pixelFormat, WGL_BLUE_BITS_ARB);
window->alphaBits =
getPixelFormatAttrib(window, pixelFormat, WGL_ALPHA_BITS_ARB);
window->depthBits =
getPixelFormatAttrib(window, pixelFormat, WGL_DEPTH_BITS_ARB);
window->stencilBits =
getPixelFormatAttrib(window, pixelFormat, WGL_STENCIL_BITS_ARB);
window->accumRedBits =
getPixelFormatAttrib(window, pixelFormat, WGL_ACCUM_RED_BITS_ARB);
window->accumGreenBits =
getPixelFormatAttrib(window, pixelFormat, WGL_ACCUM_GREEN_BITS_ARB);
window->accumBlueBits =
getPixelFormatAttrib(window, pixelFormat, WGL_ACCUM_BLUE_BITS_ARB);
window->accumAlphaBits =
getPixelFormatAttrib(window, pixelFormat, WGL_ACCUM_ALPHA_BITS_ARB);
window->auxBuffers =
getPixelFormatAttrib(window, pixelFormat, WGL_AUX_BUFFERS_ARB);
window->stereo =
getPixelFormatAttrib(window, pixelFormat, WGL_STEREO_ARB) ? GL_TRUE : GL_FALSE;
if (window->WGL.ARB_multisample)
{
window->samples = getPixelFormatAttrib(window, pixelFormat, WGL_SAMPLES_ARB);
// We force 1 to zero here because all the other APIs say zero when
// they really mean 1
if (window->samples == 1)
window->samples = 0;
}
else
window->samples = 0;
}
else
{
DescribePixelFormat(window->WGL.DC, pixelFormat,
sizeof(PIXELFORMATDESCRIPTOR), &pfd);
// Is current OpenGL context accelerated?
window->accelerated = (pfd.dwFlags & PFD_GENERIC_ACCELERATED) ||
!(pfd.dwFlags & PFD_GENERIC_FORMAT) ? 1 : 0;
// "Standard" window parameters
window->redBits = pfd.cRedBits;
window->greenBits = pfd.cGreenBits;
window->blueBits = pfd.cBlueBits;
window->alphaBits = pfd.cAlphaBits;
window->depthBits = pfd.cDepthBits;
window->stencilBits = pfd.cStencilBits;
window->accumRedBits = pfd.cAccumRedBits;
window->accumGreenBits = pfd.cAccumGreenBits;
window->accumBlueBits = pfd.cAccumBlueBits;
window->accumAlphaBits = pfd.cAccumAlphaBits;
window->auxBuffers = pfd.cAuxBuffers;
window->stereo = (pfd.dwFlags & PFD_STEREO) ? GL_TRUE : GL_FALSE;
// If we don't have WGL_ARB_pixel_format then we can't have created a
// multisampling context, so it's safe to hardcode zero here
window->samples = 0;
}
}
//========================================================================
// Creates an OpenGL context on the specified device context
//========================================================================
static GLboolean createContext(_GLFWwindow* window,
const _GLFWwndconfig* wndconfig,
int pixelFormat)
{
PIXELFORMATDESCRIPTOR pfd;
int i = 0, attribs[40];
HGLRC share = NULL;
if (wndconfig->share)
share = wndconfig->share->WGL.context;
if (!DescribePixelFormat(window->WGL.DC, pixelFormat, sizeof(pfd), &pfd))
{
_glfwSetError(GLFW_OPENGL_UNAVAILABLE,
"Win32/WGL: Failed to retrieve PFD for selected pixel format");
return GL_FALSE;
}
if (!SetPixelFormat(window->WGL.DC, pixelFormat, &pfd))
{
_glfwSetError(GLFW_OPENGL_UNAVAILABLE,
"Win32/WGL: Failed to set selected pixel format");
return GL_FALSE;
}
if (window->WGL.ARB_create_context)
{
// Use the newer wglCreateContextAttribsARB creation method
if (wndconfig->glMajor != 1 || wndconfig->glMinor != 0)
{
// Request an explicitly versioned context
attribs[i++] = WGL_CONTEXT_MAJOR_VERSION_ARB;
attribs[i++] = wndconfig->glMajor;
attribs[i++] = WGL_CONTEXT_MINOR_VERSION_ARB;
attribs[i++] = wndconfig->glMinor;
}
if (wndconfig->glForward || wndconfig->glDebug || wndconfig->glRobustness)
{
int flags = 0;
if (wndconfig->glForward)
flags |= WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;
if (wndconfig->glDebug)
flags |= WGL_CONTEXT_DEBUG_BIT_ARB;
if (wndconfig->glRobustness)
flags |= WGL_CONTEXT_ROBUST_ACCESS_BIT_ARB;
attribs[i++] = WGL_CONTEXT_FLAGS_ARB;
attribs[i++] = flags;
}
if (wndconfig->glProfile)
{
int flags = 0;
if (!window->WGL.ARB_create_context_profile)
{
_glfwSetError(GLFW_VERSION_UNAVAILABLE,
"Win32/WGL: OpenGL profile requested but "
"WGL_ARB_create_context_profile is unavailable");
return GL_FALSE;
}
if (wndconfig->glProfile == GLFW_OPENGL_ES2_PROFILE &&
!window->WGL.EXT_create_context_es2_profile)
{
_glfwSetError(GLFW_VERSION_UNAVAILABLE,
"Win32/WGL: OpenGL ES 2.x profile requested but "
"WGL_EXT_create_context_es2_profile is unavailable");
return GL_FALSE;
}
if (wndconfig->glProfile == GLFW_OPENGL_CORE_PROFILE)
flags = WGL_CONTEXT_CORE_PROFILE_BIT_ARB;
else if (wndconfig->glProfile == GLFW_OPENGL_COMPAT_PROFILE)
flags = WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB;
else if (wndconfig->glProfile == GLFW_OPENGL_ES2_PROFILE)
flags = WGL_CONTEXT_ES2_PROFILE_BIT_EXT;
attribs[i++] = WGL_CONTEXT_PROFILE_MASK_ARB;
attribs[i++] = flags;
}
if (wndconfig->glRobustness)
{
int strategy;
if (!window->WGL.ARB_create_context_robustness)
{
_glfwSetError(GLFW_VERSION_UNAVAILABLE,
"Win32/WGL: An OpenGL robustness strategy was "
"requested but WGL_ARB_create_context_robustness "
"is unavailable");
return GL_FALSE;
}
if (wndconfig->glRobustness == GLFW_OPENGL_NO_RESET_NOTIFICATION)
strategy = WGL_NO_RESET_NOTIFICATION_ARB;
else if (wndconfig->glRobustness == GLFW_OPENGL_LOSE_CONTEXT_ON_RESET)
strategy = WGL_LOSE_CONTEXT_ON_RESET_ARB;
attribs[i++] = WGL_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB;
attribs[i++] = strategy;
}
attribs[i++] = 0;
window->WGL.context = window->WGL.CreateContextAttribsARB(window->WGL.DC,
share,
attribs);
if (!window->WGL.context)
{
_glfwSetError(GLFW_VERSION_UNAVAILABLE,
"Win32/WGL: Failed to create OpenGL context");
return GL_FALSE;
}
}
else
{
window->WGL.context = wglCreateContext(window->WGL.DC);
if (!window->WGL.context)
{
_glfwSetError(GLFW_PLATFORM_ERROR,
"Win32/WGL: Failed to create OpenGL context");
return GL_FALSE;
}
if (share)
{
if (!wglShareLists(share, window->WGL.context))
{
_glfwSetError(GLFW_PLATFORM_ERROR,
"Win32/WGL: Failed to enable sharing with "
"specified OpenGL context");
return GL_FALSE;
}
}
}
glfwMakeContextCurrent(window);
initWGLExtensions(window);
refreshContextParams(window, pixelFormat);
return GL_TRUE;
}
//////////////////////////////////////////////////////////////////////////
////// GLFW internal API //////
//////////////////////////////////////////////////////////////////////////
//========================================================================
// Prepare for creation of the OpenGL context
//========================================================================
int _glfwCreateContext(_GLFWwindow* window,
const _GLFWwndconfig* wndconfig,
const _GLFWfbconfig* fbconfig)
{
_GLFWfbconfig closest;
window->WGL.DC = GetDC(window->Win32.handle);
if (!window->WGL.DC)
{
_glfwSetError(GLFW_PLATFORM_ERROR,
"Win32/WGL: Failed to retrieve DC for window");
return GL_FALSE;
}
// Choose the best available fbconfig
{
unsigned int fbcount;
_GLFWfbconfig* fbconfigs;
const _GLFWfbconfig* result;
fbconfigs = getFBConfigs(window, &fbcount);
if (!fbconfigs)
{
_glfwSetError(GLFW_PLATFORM_ERROR,
"Win32/WGL: No usable pixel formats found");
return GL_FALSE;
}
result = _glfwChooseFBConfig(fbconfig, fbconfigs, fbcount);
if (!result)
{
_glfwSetError(GLFW_PLATFORM_ERROR,
"Win32/WGL: No pixel format matched the criteria");
free(fbconfigs);
return GL_FALSE;
}
closest = *result;
free(fbconfigs);
}
return createContext(window, wndconfig, (int) closest.platformID);
}
//========================================================================
// Destroy the OpenGL context
//========================================================================
void _glfwDestroyContext(_GLFWwindow* window)
{
// This is duplicated from glfwCloseWindow
// TODO: Stop duplicating code
if (window == _glfwLibrary.currentWindow)
glfwMakeContextCurrent(NULL);
if (window->WGL.context)
{
wglDeleteContext(window->WGL.context);
window->WGL.context = NULL;
}
if (window->WGL.DC)
{
ReleaseDC(window->Win32.handle, window->WGL.DC);
window->WGL.DC = NULL;
}
}
//////////////////////////////////////////////////////////////////////////
////// GLFW platform API //////
//////////////////////////////////////////////////////////////////////////

6
src/win32_platform.h
View File

@ -232,6 +232,12 @@ char* _glfwCreateUTF8FromWideString(const WCHAR* source);
// Time
void _glfwInitTimer(void);
// OpenGL support
int _glfwCreateContext(_GLFWwindow* window,
const _GLFWwndconfig* wndconfig,
const _GLFWfbconfig* fbconfig);
void _glfwDestroyContext(_GLFWwindow* window);
// Fullscreen support
void _glfwSetVideoMode(int* width, int* height,
int* bpp, int* refreshRate,

569
src/win32_window.c
View File

@ -122,329 +122,6 @@ static void setForegroundWindow(HWND hWnd)
}
//========================================================================
// Returns the specified attribute of the specified pixel format
// NOTE: Do not call this unless we have found WGL_ARB_pixel_format
//========================================================================
static int getPixelFormatAttrib(_GLFWwindow* window, int pixelFormat, int attrib)
{
int value = 0;
if (!window->WGL.GetPixelFormatAttribivARB(window->WGL.DC,
pixelFormat,
0, 1, &attrib, &value))
{
// NOTE: We should probably handle this error somehow
return 0;
}
return value;
}
//========================================================================
// Return a list of available and usable framebuffer configs
//========================================================================
static _GLFWfbconfig* getFBConfigs(_GLFWwindow* window, unsigned int* found)
{
_GLFWfbconfig* fbconfigs;
PIXELFORMATDESCRIPTOR pfd;
int i, available;
*found = 0;
if (window->WGL.ARB_pixel_format)
{
available = getPixelFormatAttrib(window,
1,
WGL_NUMBER_PIXEL_FORMATS_ARB);
}
else
{
available = DescribePixelFormat(window->WGL.DC,
1,
sizeof(PIXELFORMATDESCRIPTOR),
NULL);
}
if (!available)
{
_glfwSetError(GLFW_OPENGL_UNAVAILABLE, "Win32/WGL: No pixel formats found");
return NULL;
}
fbconfigs = (_GLFWfbconfig*) malloc(sizeof(_GLFWfbconfig) * available);
if (!fbconfigs)
{
_glfwSetError(GLFW_OUT_OF_MEMORY,
"Win32/WGL: Failed to allocate _GLFWfbconfig array");
return NULL;
}
for (i = 1; i <= available; i++)
{
_GLFWfbconfig* f = fbconfigs + *found;
if (window->WGL.ARB_pixel_format)
{
// Get pixel format attributes through WGL_ARB_pixel_format
if (!getPixelFormatAttrib(window, i, WGL_SUPPORT_OPENGL_ARB) ||
!getPixelFormatAttrib(window, i, WGL_DRAW_TO_WINDOW_ARB) ||
!getPixelFormatAttrib(window, i, WGL_DOUBLE_BUFFER_ARB))
{
continue;
}
if (getPixelFormatAttrib(window, i, WGL_PIXEL_TYPE_ARB) !=
WGL_TYPE_RGBA_ARB)
{
continue;
}
if (getPixelFormatAttrib(window, i, WGL_ACCELERATION_ARB) ==
WGL_NO_ACCELERATION_ARB)
{
continue;
}
f->redBits = getPixelFormatAttrib(window, i, WGL_RED_BITS_ARB);
f->greenBits = getPixelFormatAttrib(window, i, WGL_GREEN_BITS_ARB);
f->blueBits = getPixelFormatAttrib(window, i, WGL_BLUE_BITS_ARB);
f->alphaBits = getPixelFormatAttrib(window, i, WGL_ALPHA_BITS_ARB);
f->depthBits = getPixelFormatAttrib(window, i, WGL_DEPTH_BITS_ARB);
f->stencilBits = getPixelFormatAttrib(window, i, WGL_STENCIL_BITS_ARB);
f->accumRedBits = getPixelFormatAttrib(window, i, WGL_ACCUM_RED_BITS_ARB);
f->accumGreenBits = getPixelFormatAttrib(window, i, WGL_ACCUM_GREEN_BITS_ARB);
f->accumBlueBits = getPixelFormatAttrib(window, i, WGL_ACCUM_BLUE_BITS_ARB);
f->accumAlphaBits = getPixelFormatAttrib(window, i, WGL_ACCUM_ALPHA_BITS_ARB);
f->auxBuffers = getPixelFormatAttrib(window, i, WGL_AUX_BUFFERS_ARB);
f->stereo = getPixelFormatAttrib(window, i, WGL_STEREO_ARB);
if (window->WGL.ARB_multisample)
f->samples = getPixelFormatAttrib(window, i, WGL_SAMPLES_ARB);
else
f->samples = 0;
}
else
{
// Get pixel format attributes through old-fashioned PFDs
if (!DescribePixelFormat(window->WGL.DC,
i,
sizeof(PIXELFORMATDESCRIPTOR),
&pfd))
{
continue;
}
if (!(pfd.dwFlags & PFD_DRAW_TO_WINDOW) ||
!(pfd.dwFlags & PFD_SUPPORT_OPENGL) ||
!(pfd.dwFlags & PFD_DOUBLEBUFFER))
{
continue;
}
if (!(pfd.dwFlags & PFD_GENERIC_ACCELERATED) &&
(pfd.dwFlags & PFD_GENERIC_FORMAT))
{
continue;
}
if (pfd.iPixelType != PFD_TYPE_RGBA)
continue;
f->redBits = pfd.cRedBits;
f->greenBits = pfd.cGreenBits;
f->blueBits = pfd.cBlueBits;
f->alphaBits = pfd.cAlphaBits;
f->depthBits = pfd.cDepthBits;
f->stencilBits = pfd.cStencilBits;
f->accumRedBits = pfd.cAccumRedBits;
f->accumGreenBits = pfd.cAccumGreenBits;
f->accumBlueBits = pfd.cAccumBlueBits;
f->accumAlphaBits = pfd.cAccumAlphaBits;
f->auxBuffers = pfd.cAuxBuffers;
f->stereo = (pfd.dwFlags & PFD_STEREO) ? GL_TRUE : GL_FALSE;
// PFD pixel formats do not support FSAA
f->samples = 0;
}
f->platformID = i;
(*found)++;
}
if (*found == 0)
{
free(fbconfigs);
return NULL;
}
return fbconfigs;
}
//========================================================================
// Creates an OpenGL context on the specified device context
//========================================================================
static GLboolean createContext(_GLFWwindow* window,
const _GLFWwndconfig* wndconfig,
int pixelFormat)
{
PIXELFORMATDESCRIPTOR pfd;
int i = 0, attribs[40];
HGLRC share = NULL;
if (wndconfig->share)
share = wndconfig->share->WGL.context;
if (!DescribePixelFormat(window->WGL.DC, pixelFormat, sizeof(pfd), &pfd))
{
_glfwSetError(GLFW_OPENGL_UNAVAILABLE,
"Win32/WGL: Failed to retrieve PFD for selected pixel format");
return GL_FALSE;
}
if (!SetPixelFormat(window->WGL.DC, pixelFormat, &pfd))
{
_glfwSetError(GLFW_OPENGL_UNAVAILABLE,
"Win32/WGL: Failed to set selected pixel format");
return GL_FALSE;
}
if (window->WGL.ARB_create_context)
{
// Use the newer wglCreateContextAttribsARB creation method
if (wndconfig->glMajor != 1 || wndconfig->glMinor != 0)
{
// Request an explicitly versioned context
attribs[i++] = WGL_CONTEXT_MAJOR_VERSION_ARB;
attribs[i++] = wndconfig->glMajor;
attribs[i++] = WGL_CONTEXT_MINOR_VERSION_ARB;
attribs[i++] = wndconfig->glMinor;
}
if (wndconfig->glForward || wndconfig->glDebug || wndconfig->glRobustness)
{
int flags = 0;
if (wndconfig->glForward)
flags |= WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;
if (wndconfig->glDebug)
flags |= WGL_CONTEXT_DEBUG_BIT_ARB;
if (wndconfig->glRobustness)
flags |= WGL_CONTEXT_ROBUST_ACCESS_BIT_ARB;
attribs[i++] = WGL_CONTEXT_FLAGS_ARB;
attribs[i++] = flags;
}
if (wndconfig->glProfile)
{
int flags = 0;
if (!window->WGL.ARB_create_context_profile)
{
_glfwSetError(GLFW_VERSION_UNAVAILABLE,
"Win32/WGL: OpenGL profile requested but "
"WGL_ARB_create_context_profile is unavailable");
return GL_FALSE;
}
if (wndconfig->glProfile == GLFW_OPENGL_ES2_PROFILE &&
!window->WGL.EXT_create_context_es2_profile)
{
_glfwSetError(GLFW_VERSION_UNAVAILABLE,
"Win32/WGL: OpenGL ES 2.x profile requested but "
"WGL_EXT_create_context_es2_profile is unavailable");
return GL_FALSE;
}
if (wndconfig->glProfile == GLFW_OPENGL_CORE_PROFILE)
flags = WGL_CONTEXT_CORE_PROFILE_BIT_ARB;
else if (wndconfig->glProfile == GLFW_OPENGL_COMPAT_PROFILE)
flags = WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB;
else if (wndconfig->glProfile == GLFW_OPENGL_ES2_PROFILE)
flags = WGL_CONTEXT_ES2_PROFILE_BIT_EXT;
attribs[i++] = WGL_CONTEXT_PROFILE_MASK_ARB;
attribs[i++] = flags;
}
if (wndconfig->glRobustness)
{
int strategy;
if (!window->WGL.ARB_create_context_robustness)
{
_glfwSetError(GLFW_VERSION_UNAVAILABLE,
"Win32/WGL: An OpenGL robustness strategy was "
"requested but WGL_ARB_create_context_robustness "
"is unavailable");
return GL_FALSE;
}
if (wndconfig->glRobustness == GLFW_OPENGL_NO_RESET_NOTIFICATION)
strategy = WGL_NO_RESET_NOTIFICATION_ARB;
else if (wndconfig->glRobustness == GLFW_OPENGL_LOSE_CONTEXT_ON_RESET)
strategy = WGL_LOSE_CONTEXT_ON_RESET_ARB;
attribs[i++] = WGL_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB;
attribs[i++] = strategy;
}
attribs[i++] = 0;
window->WGL.context = window->WGL.CreateContextAttribsARB(window->WGL.DC,
share,
attribs);
if (!window->WGL.context)
{
_glfwSetError(GLFW_VERSION_UNAVAILABLE,
"Win32/WGL: Failed to create OpenGL context");
return GL_FALSE;
}
}
else
{
window->WGL.context = wglCreateContext(window->WGL.DC);
if (!window->WGL.context)
{
_glfwSetError(GLFW_PLATFORM_ERROR,
"Win32/WGL: Failed to create OpenGL context");
return GL_FALSE;
}
if (share)
{
if (!wglShareLists(share, window->WGL.context))
{
_glfwSetError(GLFW_PLATFORM_ERROR,
"Win32/WGL: Failed to enable sharing with "
"specified OpenGL context");
return GL_FALSE;
}
}
}
return GL_TRUE;
}
//========================================================================
// Hide mouse cursor
//========================================================================
@ -1104,94 +781,6 @@ static void getFullWindowSize(_GLFWwindow* window,
}
//========================================================================
// Initialize WGL-specific extensions
// This function is called once before initial context creation, i.e. before
// any WGL extensions could be present. This is done in order to have both
// extension variable clearing and loading in the same place, hopefully
// decreasing the possibility of forgetting to add one without the other.
//========================================================================
static void initWGLExtensions(_GLFWwindow* window)
{
// This needs to include every function pointer loaded below
window->WGL.SwapIntervalEXT = NULL;
window->WGL.GetPixelFormatAttribivARB = NULL;
window->WGL.GetExtensionsStringARB = NULL;
window->WGL.GetExtensionsStringEXT = NULL;
window->WGL.CreateContextAttribsARB = NULL;
// This needs to include every extension used below except for
// WGL_ARB_extensions_string and WGL_EXT_extensions_string
window->WGL.ARB_multisample = GL_FALSE;
window->WGL.ARB_create_context = GL_FALSE;
window->WGL.ARB_create_context_profile = GL_FALSE;
window->WGL.EXT_create_context_es2_profile = GL_FALSE;
window->WGL.ARB_create_context_robustness = GL_FALSE;
window->WGL.EXT_swap_control = GL_FALSE;
window->WGL.ARB_pixel_format = GL_FALSE;
window->WGL.GetExtensionsStringEXT = (PFNWGLGETEXTENSIONSSTRINGEXTPROC)
wglGetProcAddress("wglGetExtensionsStringEXT");
if (!window->WGL.GetExtensionsStringEXT)
{
window->WGL.GetExtensionsStringARB = (PFNWGLGETEXTENSIONSSTRINGARBPROC)
wglGetProcAddress("wglGetExtensionsStringARB");
if (!window->WGL.GetExtensionsStringARB)
return;
}
if (_glfwPlatformExtensionSupported("WGL_ARB_multisample"))
window->WGL.ARB_multisample = GL_TRUE;
if (_glfwPlatformExtensionSupported("WGL_ARB_create_context"))
{
window->WGL.CreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC)
wglGetProcAddress("wglCreateContextAttribsARB");
if (window->WGL.CreateContextAttribsARB)
window->WGL.ARB_create_context = GL_TRUE;
}
if (window->WGL.ARB_create_context)
{
if (_glfwPlatformExtensionSupported("WGL_ARB_create_context_profile"))
window->WGL.ARB_create_context_profile = GL_TRUE;
}
if (window->WGL.ARB_create_context &&
window->WGL.ARB_create_context_profile)
{
if (_glfwPlatformExtensionSupported("WGL_EXT_create_context_es2_profile"))
window->WGL.EXT_create_context_es2_profile = GL_TRUE;
}
if (window->WGL.ARB_create_context)
{
if (_glfwPlatformExtensionSupported("WGL_ARB_create_context_robustness"))
window->WGL.ARB_create_context_robustness = GL_TRUE;
}
if (_glfwPlatformExtensionSupported("WGL_EXT_swap_control"))
{
window->WGL.SwapIntervalEXT = (PFNWGLSWAPINTERVALEXTPROC)
wglGetProcAddress("wglSwapIntervalEXT");
if (window->WGL.SwapIntervalEXT)
window->WGL.EXT_swap_control = GL_TRUE;
}
if (_glfwPlatformExtensionSupported("WGL_ARB_pixel_format"))
{
window->WGL.GetPixelFormatAttribivARB = (PFNWGLGETPIXELFORMATATTRIBIVARBPROC)
wglGetProcAddress("wglGetPixelFormatAttribivARB");
if (window->WGL.GetPixelFormatAttribivARB)
window->WGL.ARB_pixel_format = GL_TRUE;
}
}
//========================================================================
// Registers the GLFW window class
//========================================================================
@ -1232,38 +821,6 @@ static ATOM registerWindowClass(void)
}
//========================================================================
// Returns the closest matching pixel format, or zero on error
//========================================================================
static int choosePixelFormat(_GLFWwindow* window, const _GLFWfbconfig* fbconfig)
{
unsigned int fbcount;
int pixelFormat;
_GLFWfbconfig* fbconfigs;
const _GLFWfbconfig* closest;
fbconfigs = getFBConfigs(window, &fbcount);
if (!fbconfigs)
return 0;
closest = _glfwChooseFBConfig(fbconfig, fbconfigs, fbcount);
if (!closest)
{
free(fbconfigs);
return 0;
}
pixelFormat = (int) closest->platformID;
free(fbconfigs);
fbconfigs = NULL;
closest = NULL;
return pixelFormat;
}
//========================================================================
// Creates the GLFW window and rendering context
//========================================================================
@ -1273,7 +830,7 @@ static int createWindow(_GLFWwindow* window,
const _GLFWfbconfig* fbconfig)
{
DWORD dwStyle, dwExStyle;
int pixelFormat, fullWidth, fullHeight;
int fullWidth, fullHeight;
RECT wa;
POINT pos;
WCHAR* wideTitle;
@ -1353,31 +910,15 @@ static int createWindow(_GLFWwindow* window,
free(wideTitle);
window->WGL.DC = GetDC(window->Win32.handle);
if (!window->WGL.DC)
{
_glfwSetError(GLFW_PLATFORM_ERROR,
"Win32/WGL: Failed to retrieve DC for window");
return GL_FALSE;
}
pixelFormat = choosePixelFormat(window, fbconfig);
if (!pixelFormat)
return GL_FALSE;
if (!createContext(window, wndconfig, pixelFormat))
return GL_FALSE;
glfwMakeContextCurrent(window);
initWGLExtensions(window);
// Initialize cursor position data
GetCursorPos(&pos);
ScreenToClient(window->Win32.handle, &pos);
window->Win32.oldCursorX = window->cursorPosX = pos.x;
window->Win32.oldCursorY = window->cursorPosY = pos.y;
if (!_glfwCreateContext(window, wndconfig, fbconfig))
return GL_FALSE;
return GL_TRUE;
}
@ -1388,28 +929,13 @@ static int createWindow(_GLFWwindow* window,
static void destroyWindow(_GLFWwindow* window)
{
// This is duplicated from glfwCloseWindow
// TODO: Stop duplicating code
if (window == _glfwLibrary.currentWindow)
glfwMakeContextCurrent(NULL);
_glfwDestroyContext(window);
// This is duplicated from glfwCloseWindow
// TODO: Stop duplicating code
if (window == _glfwLibrary.activeWindow)
_glfwLibrary.activeWindow = NULL;
if (window->WGL.context)
{
wglDeleteContext(window->WGL.context);
window->WGL.context = NULL;
}
if (window->WGL.DC)
{
ReleaseDC(window->Win32.handle, window->WGL.DC);
window->WGL.DC = NULL;
}
if (window->Win32.handle)
{
DestroyWindow(window->Win32.handle);
@ -1669,93 +1195,10 @@ void _glfwPlatformRestoreWindow(_GLFWwindow* window)
void _glfwPlatformRefreshWindowParams(void)
{
PIXELFORMATDESCRIPTOR pfd;
DEVMODE dm;
int pixelFormat;
_GLFWwindow* window = _glfwLibrary.currentWindow;
// Obtain a detailed description of current pixel format
pixelFormat = GetPixelFormat(window->WGL.DC);
if (window->WGL.ARB_pixel_format)
{
if (getPixelFormatAttrib(window, pixelFormat, WGL_ACCELERATION_ARB) !=
WGL_NO_ACCELERATION_ARB)
{
window->accelerated = GL_TRUE;
}
else
window->accelerated = GL_FALSE;
window->redBits =
getPixelFormatAttrib(window, pixelFormat, WGL_RED_BITS_ARB);
window->greenBits =
getPixelFormatAttrib(window, pixelFormat, WGL_GREEN_BITS_ARB);
window->blueBits =
getPixelFormatAttrib(window, pixelFormat, WGL_BLUE_BITS_ARB);
window->alphaBits =
getPixelFormatAttrib(window, pixelFormat, WGL_ALPHA_BITS_ARB);
window->depthBits =
getPixelFormatAttrib(window, pixelFormat, WGL_DEPTH_BITS_ARB);
window->stencilBits =
getPixelFormatAttrib(window, pixelFormat, WGL_STENCIL_BITS_ARB);
window->accumRedBits =
getPixelFormatAttrib(window, pixelFormat, WGL_ACCUM_RED_BITS_ARB);
window->accumGreenBits =
getPixelFormatAttrib(window, pixelFormat, WGL_ACCUM_GREEN_BITS_ARB);
window->accumBlueBits =
getPixelFormatAttrib(window, pixelFormat, WGL_ACCUM_BLUE_BITS_ARB);
window->accumAlphaBits =
getPixelFormatAttrib(window, pixelFormat, WGL_ACCUM_ALPHA_BITS_ARB);
window->auxBuffers =
getPixelFormatAttrib(window, pixelFormat, WGL_AUX_BUFFERS_ARB);
window->stereo =
getPixelFormatAttrib(window, pixelFormat, WGL_STEREO_ARB) ? GL_TRUE : GL_FALSE;
if (window->WGL.ARB_multisample)
{
window->samples = getPixelFormatAttrib(window, pixelFormat, WGL_SAMPLES_ARB);
// We force 1 to zero here because all the other APIs say zero when
// they really mean 1
if (window->samples == 1)
window->samples = 0;
}
else
window->samples = 0;
}
else
{
DescribePixelFormat(window->WGL.DC, pixelFormat,
sizeof(PIXELFORMATDESCRIPTOR), &pfd);
// Is current OpenGL context accelerated?
window->accelerated = (pfd.dwFlags & PFD_GENERIC_ACCELERATED) ||
!(pfd.dwFlags & PFD_GENERIC_FORMAT) ? 1 : 0;
// "Standard" window parameters
window->redBits = pfd.cRedBits;
window->greenBits = pfd.cGreenBits;
window->blueBits = pfd.cBlueBits;
window->alphaBits = pfd.cAlphaBits;
window->depthBits = pfd.cDepthBits;
window->stencilBits = pfd.cStencilBits;
window->accumRedBits = pfd.cAccumRedBits;
window->accumGreenBits = pfd.cAccumGreenBits;
window->accumBlueBits = pfd.cAccumBlueBits;
window->accumAlphaBits = pfd.cAccumAlphaBits;
window->auxBuffers = pfd.cAuxBuffers;
window->stereo = (pfd.dwFlags & PFD_STEREO) ? GL_TRUE : GL_FALSE;
// If we don't have WGL_ARB_pixel_format then we can't have created a
// multisampling context, so it's safe to hardcode zero here
window->samples = 0;
}
ZeroMemory(&dm, sizeof(DEVMODE));
dm.dmSize = sizeof(DEVMODE);
if (EnumDisplaySettings(NULL, ENUM_CURRENT_SETTINGS, &dm))