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Removed internal fbconfig enum and selection.

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This commit is contained in:
Camilla Berglund 2013-01-15 20:00:27 +01:00
parent 0517a82467
commit a8ea120cae
6 changed files with 448 additions and 1010 deletions
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163
src/context.c
View File

@ -92,169 +92,6 @@ static GLboolean parseGLVersion(int* api, int* major, int* minor, int* rev)
////// GLFW internal API ////// ////// GLFW internal API //////
////////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////////
//========================================================================
// Return the available framebuffer config closest to the desired values
// This is based on the manual GLX Visual selection from 2.6
//========================================================================
const _GLFWfbconfig* _glfwChooseFBConfig(const _GLFWfbconfig* desired,
const _GLFWfbconfig* alternatives,
unsigned int count)
{
unsigned int i;
unsigned int missing, leastMissing = UINT_MAX;
unsigned int colorDiff, leastColorDiff = UINT_MAX;
unsigned int extraDiff, leastExtraDiff = UINT_MAX;
const _GLFWfbconfig* current;
const _GLFWfbconfig* closest = NULL;
for (i = 0; i < count; i++)
{
current = alternatives + i;
if (desired->stereo > 0 && current->stereo == 0)
{
// Stereo is a hard constraint
continue;
}
// Count number of missing buffers
{
missing = 0;
if (desired->alphaBits > 0 && current->alphaBits == 0)
missing++;
if (desired->depthBits > 0 && current->depthBits == 0)
missing++;
if (desired->stencilBits > 0 && current->stencilBits == 0)
missing++;
if (desired->auxBuffers > 0 && current->auxBuffers < desired->auxBuffers)
missing += desired->auxBuffers - current->auxBuffers;
if (desired->samples > 0 && current->samples == 0)
{
// Technically, several multisampling buffers could be
// involved, but that's a lower level implementation detail and
// not important to us here, so we count them as one
missing++;
}
}
// These polynomials make many small channel size differences matter
// less than one large channel size difference
// Calculate color channel size difference value
{
colorDiff = 0;
if (desired->redBits > 0)
{
colorDiff += (desired->redBits - current->redBits) *
(desired->redBits - current->redBits);
}
if (desired->greenBits > 0)
{
colorDiff += (desired->greenBits - current->greenBits) *
(desired->greenBits - current->greenBits);
}
if (desired->blueBits > 0)
{
colorDiff += (desired->blueBits - current->blueBits) *
(desired->blueBits - current->blueBits);
}
}
// Calculate non-color channel size difference value
{
extraDiff = 0;
if (desired->alphaBits > 0)
{
extraDiff += (desired->alphaBits - current->alphaBits) *
(desired->alphaBits - current->alphaBits);
}
if (desired->depthBits > 0)
{
extraDiff += (desired->depthBits - current->depthBits) *
(desired->depthBits - current->depthBits);
}
if (desired->stencilBits > 0)
{
extraDiff += (desired->stencilBits - current->stencilBits) *
(desired->stencilBits - current->stencilBits);
}
if (desired->accumRedBits > 0)
{
extraDiff += (desired->accumRedBits - current->accumRedBits) *
(desired->accumRedBits - current->accumRedBits);
}
if (desired->accumGreenBits > 0)
{
extraDiff += (desired->accumGreenBits - current->accumGreenBits) *
(desired->accumGreenBits - current->accumGreenBits);
}
if (desired->accumBlueBits > 0)
{
extraDiff += (desired->accumBlueBits - current->accumBlueBits) *
(desired->accumBlueBits - current->accumBlueBits);
}
if (desired->accumAlphaBits > 0)
{
extraDiff += (desired->accumAlphaBits - current->accumAlphaBits) *
(desired->accumAlphaBits - current->accumAlphaBits);
}
if (desired->samples > 0)
{
extraDiff += (desired->samples - current->samples) *
(desired->samples - current->samples);
}
if (desired->sRGB)
{
if (!current->sRGB)
extraDiff++;
}
}
// Figure out if the current one is better than the best one found so far
// Least number of missing buffers is the most important heuristic,
// then color buffer size match and lastly size match for other buffers
if (missing < leastMissing)
closest = current;
else if (missing == leastMissing)
{
if ((colorDiff < leastColorDiff) ||
(colorDiff == leastColorDiff && extraDiff < leastExtraDiff))
{
closest = current;
}
}
if (current == closest)
{
leastMissing = missing;
leastColorDiff = colorDiff;
leastExtraDiff = extraDiff;
}
}
return closest;
}
//======================================================================== //========================================================================
// Checks whether the client API part of the window config is sane // Checks whether the client API part of the window config is sane
//======================================================================== //========================================================================

249
src/egl_context.c
View File

@ -32,6 +32,7 @@
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <assert.h>
//======================================================================== //========================================================================
@ -52,139 +53,62 @@
static _GLFW_TLS _GLFWwindow* _glfwCurrentWindow = NULL; static _GLFW_TLS _GLFWwindow* _glfwCurrentWindow = NULL;
//////////////////////////////////////////////////////////////////////////
////// GLFW internal API //////
//////////////////////////////////////////////////////////////////////////
//======================================================================== //========================================================================
// Returns the specified attribute of the specified EGLConfig // Initialize EGL
//======================================================================== //========================================================================
static int getConfigAttrib(EGLConfig config, int attrib) int _glfwInitOpenGL(void)
{ {
int value; _glfw.egl.display = eglGetDisplay(_GLFW_EGL_NATIVE_DISPLAY);
eglGetConfigAttrib(_glfw.egl.display, config, attrib, &value); if (_glfw.egl.display == EGL_NO_DISPLAY)
return value; {
_glfwInputError(GLFW_API_UNAVAILABLE, "EGL: Failed to get EGL display");
return GL_FALSE;
}
if (!eglInitialize(_glfw.egl.display,
&_glfw.egl.versionMajor,
&_glfw.egl.versionMinor))
{
_glfwInputError(GLFW_API_UNAVAILABLE, "EGL: Failed to initialize EGL");
return GL_FALSE;
}
if (_glfwPlatformExtensionSupported("EGL_KHR_create_context"))
_glfw.egl.KHR_create_context = GL_TRUE;
return GL_TRUE;
} }
//======================================================================== //========================================================================
// Return a list of available and usable framebuffer configs // Terminate EGL
//======================================================================== //========================================================================
static _GLFWfbconfig* getFBConfigs(_GLFWwindow* window, void _glfwTerminateOpenGL(void)
const _GLFWwndconfig* wndconfig,
unsigned int* found)
{ {
EGLConfig* configs; eglTerminate(_glfw.egl.display);
_GLFWfbconfig* result;
int i, count = 0;
*found = 0;
eglGetConfigs(_glfw.egl.display, NULL, 0, &count);
configs = (EGLConfig*) malloc(sizeof(EGLConfig) * count);
if (!configs)
{
_glfwInputError(GLFW_OUT_OF_MEMORY, NULL);
return NULL;
}
eglGetConfigs(_glfw.egl.display, configs, count, &count);
if (!count)
{
free(configs);
_glfwInputError(GLFW_API_UNAVAILABLE, "EGL: No EGLConfigs returned");
return NULL;
}
result = (_GLFWfbconfig*) malloc(sizeof(_GLFWfbconfig) * count);
if (!result)
{
free(configs);
_glfwInputError(GLFW_OUT_OF_MEMORY, NULL);
return NULL;
}
for (i = 0; i < count; i++)
{
_GLFWfbconfig* f = result + *found;
#if defined(_GLFW_X11)
if (!getConfigAttrib(configs[i], EGL_NATIVE_VISUAL_ID))
{
// Only consider EGLConfigs with associated visuals
continue;
}
#endif // _GLFW_X11
if (!(getConfigAttrib(configs[i], EGL_COLOR_BUFFER_TYPE) & EGL_RGB_BUFFER))
{
// Only consider RGB(A) EGLConfigs
continue;
}
if (!(getConfigAttrib(configs[i], EGL_SURFACE_TYPE) & EGL_WINDOW_BIT))
{
// Only consider window EGLConfigs
continue;
}
if (wndconfig->clientAPI == GLFW_OPENGL_ES_API)
{
if (wndconfig->glMajor == 1)
{
if (!(getConfigAttrib(configs[i], EGL_RENDERABLE_TYPE) & EGL_OPENGL_ES_BIT))
continue;
}
else
{
if (!(getConfigAttrib(configs[i], EGL_RENDERABLE_TYPE) & EGL_OPENGL_ES2_BIT))
continue;
}
}
else if (wndconfig->clientAPI == GLFW_OPENGL_API)
{
if (!(getConfigAttrib(configs[i], EGL_RENDERABLE_TYPE) & EGL_OPENGL_BIT))
continue;
}
f->redBits = getConfigAttrib(configs[i], EGL_RED_SIZE);
f->greenBits = getConfigAttrib(configs[i], EGL_GREEN_SIZE);
f->blueBits = getConfigAttrib(configs[i], EGL_BLUE_SIZE);
f->alphaBits = getConfigAttrib(configs[i], EGL_ALPHA_SIZE);
f->depthBits = getConfigAttrib(configs[i], EGL_DEPTH_SIZE);
f->stencilBits = getConfigAttrib(configs[i], EGL_STENCIL_SIZE);
f->samples = getConfigAttrib(configs[i], EGL_SAMPLES);
// NOTE: There does not appear to be any way to request sRGB
// framebuffers for OpenGL or GLES contexts; only for OpenVG ones
f->sRGB = GL_FALSE;
f->platformID = (GLFWintptr) getConfigAttrib(configs[i], EGL_CONFIG_ID);
(*found)++;
}
free(configs);
return result;
} }
//======================================================================== //========================================================================
// Create the actual OpenGL(|ES) context // Prepare for creation of the OpenGL context
//======================================================================== //========================================================================
#define setEGLattrib(attribName, attribValue) \ #define setEGLattrib(attribName, attribValue) \
{ \ { \
attribs[index++] = attribName; \ attribs[index++] = attribName; \
attribs[index++] = attribValue; \ attribs[index++] = attribValue; \
assert(index < sizeof(attribs) / sizeof(attribs[0])); \
} }
static int createContext(_GLFWwindow* window, int _glfwCreateContext(_GLFWwindow* window,
const _GLFWwndconfig* wndconfig, const _GLFWwndconfig* wndconfig,
EGLint fbconfigID) const _GLFWfbconfig* fbconfig)
{ {
int attribs[40]; int attribs[40];
EGLint count; EGLint count;
@ -198,7 +122,28 @@ static int createContext(_GLFWwindow* window,
{ {
int index = 0; int index = 0;
setEGLattrib(EGL_CONFIG_ID, fbconfigID); setEGLattrib(EGL_COLOR_BUFFER_TYPE, EGL_RGB_BUFFER);
if (fbconfig->redBits)
setEGLattrib(EGL_RED_SIZE, fbconfig->redBits);
if (fbconfig->greenBits)
setEGLattrib(EGL_GREEN_SIZE, fbconfig->greenBits);
if (fbconfig->blueBits)
setEGLattrib(EGL_BLUE_SIZE, fbconfig->blueBits);
if (fbconfig->alphaBits)
setEGLattrib(EGL_BLUE_SIZE, fbconfig->alphaBits);
if (fbconfig->depthBits)
setEGLattrib(EGL_DEPTH_SIZE, fbconfig->depthBits);
if (fbconfig->stencilBits)
setEGLattrib(EGL_STENCIL_SIZE, fbconfig->stencilBits);
if (fbconfig->samples)
{
setEGLattrib(EGL_SAMPLE_BUFFERS, 1);
setEGLattrib(EGL_SAMPLES, fbconfig->samples);
}
setEGLattrib(EGL_NONE, EGL_NONE); setEGLattrib(EGL_NONE, EGL_NONE);
eglChooseConfig(_glfw.egl.display, attribs, &config, 1, &count); eglChooseConfig(_glfw.egl.display, attribs, &config, 1, &count);
@ -351,90 +296,6 @@ static int createContext(_GLFWwindow* window,
#undef setEGLattrib #undef setEGLattrib
//////////////////////////////////////////////////////////////////////////
////// GLFW internal API //////
//////////////////////////////////////////////////////////////////////////
//========================================================================
// Initialize EGL
//========================================================================
int _glfwInitOpenGL(void)
{
_glfw.egl.display = eglGetDisplay(_GLFW_EGL_NATIVE_DISPLAY);
if (_glfw.egl.display == EGL_NO_DISPLAY)
{
_glfwInputError(GLFW_API_UNAVAILABLE, "EGL: Failed to get EGL display");
return GL_FALSE;
}
if (!eglInitialize(_glfw.egl.display,
&_glfw.egl.versionMajor,
&_glfw.egl.versionMinor))
{
_glfwInputError(GLFW_API_UNAVAILABLE, "EGL: Failed to initialize EGL");
return GL_FALSE;
}
if (_glfwPlatformExtensionSupported("EGL_KHR_create_context"))
_glfw.egl.KHR_create_context = GL_TRUE;
return GL_TRUE;
}
//========================================================================
// Terminate EGL
//========================================================================
void _glfwTerminateOpenGL(void)
{
eglTerminate(_glfw.egl.display);
}
//========================================================================
// Prepare for creation of the OpenGL context
//========================================================================
int _glfwCreateContext(_GLFWwindow* window,
const _GLFWwndconfig* wndconfig,
const _GLFWfbconfig* fbconfig)
{
_GLFWfbconfig closest;
// Choose the best available fbconfig
{
unsigned int fbcount;
_GLFWfbconfig* fbconfigs;
const _GLFWfbconfig* result;
fbconfigs = getFBConfigs(window, wndconfig, &fbcount);
if (!fbconfigs)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"EGL: No usable EGLFBConfigs found");
return GL_FALSE;
}
result = _glfwChooseFBConfig(fbconfig, fbconfigs, fbcount);
if (!result)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"EGL: No EGLFBConfig matched the criteria");
free(fbconfigs);
return GL_FALSE;
}
closest = *result;
free(fbconfigs);
}
return createContext(window, wndconfig, closest.platformID);
}
//======================================================================== //========================================================================
// Destroy the OpenGL context // Destroy the OpenGL context
//======================================================================== //========================================================================

628
src/glx_context.c
View File

@ -32,6 +32,7 @@
#include <string.h> #include <string.h>
#include <stdlib.h> #include <stdlib.h>
#include <assert.h>
// This is the only glXGetProcAddress variant not declared by glxext.h // This is the only glXGetProcAddress variant not declared by glxext.h
@ -65,156 +66,6 @@ static unsigned long _glfwErrorCode = Success;
static _GLFW_TLS _GLFWwindow* _glfwCurrentWindow = NULL; static _GLFW_TLS _GLFWwindow* _glfwCurrentWindow = NULL;
//========================================================================
// Returns the specified attribute of the specified GLXFBConfig
// NOTE: Do not call this unless we have found GLX 1.3+ or GLX_SGIX_fbconfig
//========================================================================
static int getFBConfigAttrib(_GLFWwindow* window, GLXFBConfig fbconfig, int attrib)
{
int value;
if (_glfw.glx.SGIX_fbconfig)
{
_glfw.glx.GetFBConfigAttribSGIX(_glfw.x11.display,
fbconfig, attrib, &value);
}
else
glXGetFBConfigAttrib(_glfw.x11.display, fbconfig, attrib, &value);
return value;
}
//========================================================================
// Return a list of available and usable framebuffer configs
//========================================================================
static _GLFWfbconfig* getFBConfigs(_GLFWwindow* window, unsigned int* found)
{
GLXFBConfig* fbconfigs;
_GLFWfbconfig* result;
int i, count = 0;
const char* vendor;
GLboolean trustWindowBit = GL_TRUE;
*found = 0;
if (_glfw.glx.versionMajor == 1 && _glfw.glx.versionMinor < 3)
{
if (!_glfw.glx.SGIX_fbconfig)
{
_glfwInputError(GLFW_API_UNAVAILABLE,
"GLX: GLXFBConfig support not found");
return NULL;
}
}
vendor = glXGetClientString(_glfw.x11.display, GLX_VENDOR);
if (strcmp(vendor, "Chromium") == 0)
{
// HACK: This is a (hopefully temporary) workaround for Chromium
// (VirtualBox GL) not setting the window bit on any GLXFBConfigs
trustWindowBit = GL_FALSE;
}
if (_glfw.glx.SGIX_fbconfig)
{
fbconfigs = _glfw.glx.ChooseFBConfigSGIX(_glfw.x11.display,
_glfw.x11.screen,
NULL,
&count);
if (!count)
{
_glfwInputError(GLFW_API_UNAVAILABLE,
"GLX: No GLXFBConfigs returned");
return NULL;
}
}
else
{
fbconfigs = glXGetFBConfigs(_glfw.x11.display, _glfw.x11.screen, &count);
if (!count)
{
_glfwInputError(GLFW_API_UNAVAILABLE,
"GLX: No GLXFBConfigs returned");
return NULL;
}
}
result = (_GLFWfbconfig*) malloc(sizeof(_GLFWfbconfig) * count);
if (!result)
{
_glfwInputError(GLFW_OUT_OF_MEMORY, NULL);
return NULL;
}
for (i = 0; i < count; i++)
{
_GLFWfbconfig* f = result + *found;
if (!getFBConfigAttrib(window, fbconfigs[i], GLX_DOUBLEBUFFER) ||
!getFBConfigAttrib(window, fbconfigs[i], GLX_VISUAL_ID))
{
// Only consider double-buffered GLXFBConfigs with associated visuals
continue;
}
if (!(getFBConfigAttrib(window,
fbconfigs[i],
GLX_RENDER_TYPE) & GLX_RGBA_BIT))
{
// Only consider RGBA GLXFBConfigs
continue;
}
if (!(getFBConfigAttrib(window, fbconfigs[i], GLX_DRAWABLE_TYPE) & GLX_WINDOW_BIT))
{
if (trustWindowBit)
{
// Only consider window GLXFBConfigs
continue;
}
}
f->redBits = getFBConfigAttrib(window, fbconfigs[i], GLX_RED_SIZE);
f->greenBits = getFBConfigAttrib(window, fbconfigs[i], GLX_GREEN_SIZE);
f->blueBits = getFBConfigAttrib(window, fbconfigs[i], GLX_BLUE_SIZE);
f->alphaBits = getFBConfigAttrib(window, fbconfigs[i], GLX_ALPHA_SIZE);
f->depthBits = getFBConfigAttrib(window, fbconfigs[i], GLX_DEPTH_SIZE);
f->stencilBits = getFBConfigAttrib(window, fbconfigs[i], GLX_STENCIL_SIZE);
f->accumRedBits = getFBConfigAttrib(window, fbconfigs[i], GLX_ACCUM_RED_SIZE);
f->accumGreenBits = getFBConfigAttrib(window, fbconfigs[i], GLX_ACCUM_GREEN_SIZE);
f->accumBlueBits = getFBConfigAttrib(window, fbconfigs[i], GLX_ACCUM_BLUE_SIZE);
f->accumAlphaBits = getFBConfigAttrib(window, fbconfigs[i], GLX_ACCUM_ALPHA_SIZE);
f->auxBuffers = getFBConfigAttrib(window, fbconfigs[i], GLX_AUX_BUFFERS);
f->stereo = getFBConfigAttrib(window, fbconfigs[i], GLX_STEREO);
if (_glfw.glx.ARB_multisample)
f->samples = getFBConfigAttrib(window, fbconfigs[i], GLX_SAMPLES);
else
f->samples = 0;
if (_glfw.glx.ARB_framebuffer_sRGB)
f->sRGB = getFBConfigAttrib(window, fbconfigs[i], GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB);
else
f->sRGB = GL_FALSE;
f->platformID = (GLFWintptr) getFBConfigAttrib(window, fbconfigs[i], GLX_FBCONFIG_ID);
(*found)++;
}
XFree(fbconfigs);
return result;
}
//======================================================================== //========================================================================
// Error handler used when creating a context with the GLX_ARB_create_context // Error handler used when creating a context with the GLX_ARB_create_context
// extension set // extension set
@ -231,15 +82,13 @@ static int errorHandler(Display *display, XErrorEvent* event)
// Create the OpenGL context using legacy API // Create the OpenGL context using legacy API
//======================================================================== //========================================================================
static void createLegacyContext(_GLFWwindow* window, static GLXContext createLegacyContext(_GLFWwindow* window,
const _GLFWwndconfig* wndconfig,
GLXFBConfig fbconfig, GLXFBConfig fbconfig,
GLXContext share) GLXContext share)
{ {
if (_glfw.glx.SGIX_fbconfig) if (_glfw.glx.SGIX_fbconfig)
{ {
window->glx.context = return _glfw.glx.CreateContextWithConfigSGIX(_glfw.x11.display,
_glfw.glx.CreateContextWithConfigSGIX(_glfw.x11.display,
fbconfig, fbconfig,
GLX_RGBA_TYPE, GLX_RGBA_TYPE,
share, share,
@ -247,7 +96,7 @@ static void createLegacyContext(_GLFWwindow* window,
} }
else else
{ {
window->glx.context = glXCreateNewContext(_glfw.x11.display, return glXCreateNewContext(_glfw.x11.display,
fbconfig, fbconfig,
GLX_RGBA_TYPE, GLX_RGBA_TYPE,
share, share,
@ -256,217 +105,6 @@ static void createLegacyContext(_GLFWwindow* window,
} }
//========================================================================
// Create the OpenGL context
//========================================================================
#define setGLXattrib(attribName, attribValue) \
attribs[index++] = attribName; \
attribs[index++] = attribValue;
static int createContext(_GLFWwindow* window,
const _GLFWwndconfig* wndconfig,
GLXFBConfigID fbconfigID)
{
int attribs[40];
GLXFBConfig* fbconfig;
GLXContext share = NULL;
if (wndconfig->share)
share = wndconfig->share->glx.context;
// Retrieve the previously selected GLXFBConfig
{
int dummy, index = 0;
setGLXattrib(GLX_FBCONFIG_ID, (int) fbconfigID);
setGLXattrib(None, None);
if (_glfw.glx.SGIX_fbconfig)
{
fbconfig = _glfw.glx.ChooseFBConfigSGIX(_glfw.x11.display,
_glfw.x11.screen,
attribs,
&dummy);
}
else
{
fbconfig = glXChooseFBConfig(_glfw.x11.display,
_glfw.x11.screen,
attribs,
&dummy);
}
if (fbconfig == NULL)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"GLX: Failed to retrieve the selected GLXFBConfig");
return GL_FALSE;
}
}
// Retrieve the corresponding visual
if (_glfw.glx.SGIX_fbconfig)
{
window->glx.visual =
_glfw.glx.GetVisualFromFBConfigSGIX(_glfw.x11.display, *fbconfig);
}
else
{
window->glx.visual = glXGetVisualFromFBConfig(_glfw.x11.display,
*fbconfig);
}
if (window->glx.visual == NULL)
{
XFree(fbconfig);
_glfwInputError(GLFW_PLATFORM_ERROR,
"GLX: Failed to retrieve visual for GLXFBConfig");
return GL_FALSE;
}
if (wndconfig->clientAPI == GLFW_OPENGL_ES_API)
{
if (!_glfw.glx.ARB_create_context ||
!_glfw.glx.ARB_create_context_profile ||
!_glfw.glx.EXT_create_context_es2_profile)
{
_glfwInputError(GLFW_VERSION_UNAVAILABLE,
"GLX: OpenGL ES requested but "
"GLX_EXT_create_context_es2_profile is unavailable");
return GL_FALSE;
}
}
if (wndconfig->glForward)
{
if (!_glfw.glx.ARB_create_context)
{
_glfwInputError(GLFW_VERSION_UNAVAILABLE,
"GLX: Forward compatibility requested but "
"GLX_ARB_create_context_profile is unavailable");
return GL_FALSE;
}
}
if (wndconfig->glProfile)
{
if (!_glfw.glx.ARB_create_context ||
!_glfw.glx.ARB_create_context_profile)
{
_glfwInputError(GLFW_VERSION_UNAVAILABLE,
"GLX: An OpenGL profile requested but "
"GLX_ARB_create_context_profile is unavailable");
return GL_FALSE;
}
}
if (_glfw.glx.ARB_create_context)
{
int index = 0, mask = 0, flags = 0, strategy = 0;
if (wndconfig->clientAPI == GLFW_OPENGL_API)
{
if (wndconfig->glForward)
flags |= GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;
if (wndconfig->glDebug)
flags |= GLX_CONTEXT_DEBUG_BIT_ARB;
if (wndconfig->glProfile)
{
if (wndconfig->glProfile == GLFW_OPENGL_CORE_PROFILE)
mask |= GLX_CONTEXT_CORE_PROFILE_BIT_ARB;
else if (wndconfig->glProfile == GLFW_OPENGL_COMPAT_PROFILE)
mask |= GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB;
}
}
else
mask |= GLX_CONTEXT_ES2_PROFILE_BIT_EXT;
if (wndconfig->glRobustness != GLFW_NO_ROBUSTNESS)
{
if (_glfw.glx.ARB_create_context_robustness)
{
if (wndconfig->glRobustness == GLFW_NO_RESET_NOTIFICATION)
strategy = GLX_NO_RESET_NOTIFICATION_ARB;
else if (wndconfig->glRobustness == GLFW_LOSE_CONTEXT_ON_RESET)
strategy = GLX_LOSE_CONTEXT_ON_RESET_ARB;
flags |= GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB;
}
}
if (wndconfig->glMajor != 1 || wndconfig->glMinor != 0)
{
// NOTE: Only request an explicitly versioned context when
// necessary, as explicitly requesting version 1.0 does not always
// return the highest available version
setGLXattrib(GLX_CONTEXT_MAJOR_VERSION_ARB, wndconfig->glMajor);
setGLXattrib(GLX_CONTEXT_MINOR_VERSION_ARB, wndconfig->glMinor);
}
if (mask)
setGLXattrib(GLX_CONTEXT_PROFILE_MASK_ARB, mask);
if (flags)
setGLXattrib(GLX_CONTEXT_FLAGS_ARB, flags);
if (strategy)
setGLXattrib(GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB, strategy);
setGLXattrib(None, None);
// This is the only place we set an Xlib error handler, and we only do
// it because glXCreateContextAttribsARB generates a BadMatch error if
// the requested OpenGL version is unavailable (instead of a civilized
// response like returning NULL)
_glfwErrorCode = Success;
XSetErrorHandler(errorHandler);
window->glx.context =
_glfw.glx.CreateContextAttribsARB(_glfw.x11.display,
*fbconfig,
share,
True,
attribs);
// We are done, so unset the error handler again (see above)
XSetErrorHandler(NULL);
if (window->glx.context == NULL)
{
// HACK: This is a fallback for the broken Mesa implementation of
// GLX_ARB_create_context_profile, which fails default 1.0 context
// creation with a GLXBadProfileARB error in violation of the spec
if (_glfwErrorCode == _glfw.glx.errorBase + GLXBadProfileARB &&
wndconfig->clientAPI == GLFW_OPENGL_API &&
wndconfig->glProfile == GLFW_OPENGL_NO_PROFILE &&
wndconfig->glForward == GL_FALSE)
{
createLegacyContext(window, wndconfig, *fbconfig, share);
}
}
}
else
createLegacyContext(window, wndconfig, *fbconfig, share);
XFree(fbconfig);
if (window->glx.context == NULL)
{
_glfwInputError(GLFW_PLATFORM_ERROR, "GLX: Failed to create context");
return GL_FALSE;
}
return GL_TRUE;
}
#undef setGLXattrib
////////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////////
////// GLFW internal API ////// ////// GLFW internal API //////
////////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////////
@ -616,39 +254,267 @@ void _glfwTerminateOpenGL(void)
// Prepare for creation of the OpenGL context // Prepare for creation of the OpenGL context
//======================================================================== //========================================================================
#define setGLXattrib(attribName, attribValue) \
{ \
attribs[index++] = attribName; \
attribs[index++] = attribValue; \
assert(index < sizeof(attribs) / sizeof(attribs[0])); \
}
int _glfwCreateContext(_GLFWwindow* window, int _glfwCreateContext(_GLFWwindow* window,
const _GLFWwndconfig* wndconfig, const _GLFWwndconfig* wndconfig,
const _GLFWfbconfig* fbconfig) const _GLFWfbconfig* fbconfig)
{ {
_GLFWfbconfig closest; int attribs[40];
GLXFBConfig* native;
GLXContext share = NULL;
// Choose the best available fbconfig if (wndconfig->share)
share = wndconfig->share->glx.context;
// Find a suitable GLXFBConfig
{ {
unsigned int fbcount; int count, index = 0;
_GLFWfbconfig* fbconfigs;
const _GLFWfbconfig* result;
fbconfigs = getFBConfigs(window, &fbcount); setGLXattrib(GLX_DOUBLEBUFFER, True);
if (!fbconfigs) setGLXattrib(GLX_X_RENDERABLE, True);
return GL_FALSE;
result = _glfwChooseFBConfig(fbconfig, fbconfigs, fbcount); if (fbconfig->redBits)
if (!result) setGLXattrib(GLX_RED_SIZE, fbconfig->redBits);
if (fbconfig->greenBits)
setGLXattrib(GLX_GREEN_SIZE, fbconfig->greenBits);
if (fbconfig->blueBits)
setGLXattrib(GLX_BLUE_SIZE, fbconfig->blueBits);
if (fbconfig->alphaBits)
setGLXattrib(GLX_BLUE_SIZE, fbconfig->alphaBits);
if (fbconfig->depthBits)
setGLXattrib(GLX_DEPTH_SIZE, fbconfig->depthBits);
if (fbconfig->stencilBits)
setGLXattrib(GLX_STENCIL_SIZE, fbconfig->stencilBits);
if (fbconfig->auxBuffers)
setGLXattrib(GLX_AUX_BUFFERS, fbconfig->auxBuffers);
if (fbconfig->accumRedBits)
setGLXattrib(GLX_ACCUM_RED_SIZE, fbconfig->accumRedBits);
if (fbconfig->accumGreenBits)
setGLXattrib(GLX_ACCUM_GREEN_SIZE, fbconfig->accumGreenBits);
if (fbconfig->accumBlueBits)
setGLXattrib(GLX_ACCUM_BLUE_SIZE, fbconfig->accumBlueBits);
if (fbconfig->accumAlphaBits)
setGLXattrib(GLX_ACCUM_BLUE_SIZE, fbconfig->accumAlphaBits);
if (fbconfig->stereo)
setGLXattrib(GLX_STEREO, True);
if (_glfw.glx.ARB_multisample)
{
if (fbconfig->samples)
{
setGLXattrib(GLX_SAMPLE_BUFFERS_ARB, 1);
setGLXattrib(GLX_SAMPLES_ARB, fbconfig->samples);
}
}
if (_glfw.glx.ARB_framebuffer_sRGB)
{
if (fbconfig->sRGB)
setGLXattrib(GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB, True);
}
setGLXattrib(None, None);
if (_glfw.glx.SGIX_fbconfig)
{
native = _glfw.glx.ChooseFBConfigSGIX(_glfw.x11.display,
_glfw.x11.screen,
attribs,
&count);
}
else
{
native = glXChooseFBConfig(_glfw.x11.display,
_glfw.x11.screen,
attribs,
&count);
}
if (native == NULL)
{ {
_glfwInputError(GLFW_PLATFORM_ERROR, _glfwInputError(GLFW_PLATFORM_ERROR,
"GLX: No GLXFBConfig matched the criteria"); "GLX: Failed to find a suitable GLXFBConfig");
return GL_FALSE;
}
}
free(fbconfigs); // Retrieve the corresponding visual
if (_glfw.glx.SGIX_fbconfig)
{
window->glx.visual =
_glfw.glx.GetVisualFromFBConfigSGIX(_glfw.x11.display, *native);
}
else
{
window->glx.visual = glXGetVisualFromFBConfig(_glfw.x11.display,
*native);
}
if (window->glx.visual == NULL)
{
XFree(native);
_glfwInputError(GLFW_PLATFORM_ERROR,
"GLX: Failed to retrieve visual for GLXFBConfig");
return GL_FALSE; return GL_FALSE;
} }
closest = *result; if (wndconfig->clientAPI == GLFW_OPENGL_ES_API)
free(fbconfigs); {
if (!_glfw.glx.ARB_create_context ||
!_glfw.glx.ARB_create_context_profile ||
!_glfw.glx.EXT_create_context_es2_profile)
{
XFree(native);
_glfwInputError(GLFW_VERSION_UNAVAILABLE,
"GLX: OpenGL ES requested but "
"GLX_EXT_create_context_es2_profile is unavailable");
return GL_FALSE;
}
} }
return createContext(window, wndconfig, closest.platformID); if (wndconfig->glForward)
{
if (!_glfw.glx.ARB_create_context)
{
XFree(native);
_glfwInputError(GLFW_VERSION_UNAVAILABLE,
"GLX: Forward compatibility requested but "
"GLX_ARB_create_context_profile is unavailable");
return GL_FALSE;
}
}
if (wndconfig->glProfile)
{
if (!_glfw.glx.ARB_create_context ||
!_glfw.glx.ARB_create_context_profile)
{
XFree(native);
_glfwInputError(GLFW_VERSION_UNAVAILABLE,
"GLX: An OpenGL profile requested but "
"GLX_ARB_create_context_profile is unavailable");
return GL_FALSE;
}
}
if (_glfw.glx.ARB_create_context)
{
int index = 0, mask = 0, flags = 0, strategy = 0;
if (wndconfig->clientAPI == GLFW_OPENGL_API)
{
if (wndconfig->glForward)
flags |= GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;
if (wndconfig->glDebug)
flags |= GLX_CONTEXT_DEBUG_BIT_ARB;
if (wndconfig->glProfile)
{
if (wndconfig->glProfile == GLFW_OPENGL_CORE_PROFILE)
mask |= GLX_CONTEXT_CORE_PROFILE_BIT_ARB;
else if (wndconfig->glProfile == GLFW_OPENGL_COMPAT_PROFILE)
mask |= GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB;
}
}
else
mask |= GLX_CONTEXT_ES2_PROFILE_BIT_EXT;
if (wndconfig->glRobustness != GLFW_NO_ROBUSTNESS)
{
if (_glfw.glx.ARB_create_context_robustness)
{
if (wndconfig->glRobustness == GLFW_NO_RESET_NOTIFICATION)
strategy = GLX_NO_RESET_NOTIFICATION_ARB;
else if (wndconfig->glRobustness == GLFW_LOSE_CONTEXT_ON_RESET)
strategy = GLX_LOSE_CONTEXT_ON_RESET_ARB;
flags |= GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB;
}
}
if (wndconfig->glMajor != 1 || wndconfig->glMinor != 0)
{
// NOTE: Only request an explicitly versioned context when
// necessary, as explicitly requesting version 1.0 does not always
// return the highest available version
setGLXattrib(GLX_CONTEXT_MAJOR_VERSION_ARB, wndconfig->glMajor);
setGLXattrib(GLX_CONTEXT_MINOR_VERSION_ARB, wndconfig->glMinor);
}
if (mask)
setGLXattrib(GLX_CONTEXT_PROFILE_MASK_ARB, mask);
if (flags)
setGLXattrib(GLX_CONTEXT_FLAGS_ARB, flags);
if (strategy)
setGLXattrib(GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB, strategy);
setGLXattrib(None, None);
// This is the only place we set an Xlib error handler, and we only do
// it because glXCreateContextAttribsARB generates a BadMatch error if
// the requested OpenGL version is unavailable (instead of a civilized
// response like returning NULL)
_glfwErrorCode = Success;
XSetErrorHandler(errorHandler);
window->glx.context =
_glfw.glx.CreateContextAttribsARB(_glfw.x11.display,
*native,
share,
True,
attribs);
// We are done, so unset the error handler again (see above)
XSetErrorHandler(NULL);
if (window->glx.context == NULL)
{
// HACK: This is a fallback for the broken Mesa implementation of
// GLX_ARB_create_context_profile, which fails default 1.0 context
// creation with a GLXBadProfileARB error in violation of the spec
if (_glfwErrorCode == _glfw.glx.errorBase + GLXBadProfileARB &&
wndconfig->clientAPI == GLFW_OPENGL_API &&
wndconfig->glProfile == GLFW_OPENGL_NO_PROFILE &&
wndconfig->glForward == GL_FALSE)
{
window->glx.context = createLegacyContext(window, *native, share);
}
}
}
else
window->glx.context = createLegacyContext(window, *native, share);
XFree(native);
if (window->glx.context == NULL)
{
_glfwInputError(GLFW_PLATFORM_ERROR, "GLX: Failed to create context");
return GL_FALSE;
}
return GL_TRUE;
} }
#undef setGLXattrib
//======================================================================== //========================================================================
// Destroy the OpenGL context // Destroy the OpenGL context

20
src/internal.h
View File

@ -177,11 +177,8 @@ struct _GLFWwndconfig
/*! @brief Framebuffer configuration. /*! @brief Framebuffer configuration.
* *
* This describes buffers and their sizes. It also contains * This describes buffers and their sizes. It is used to pass framebuffer
* a platform-specific ID used to map back to the backend API's object. * parameters from shared code to the platform API.
*
* It is used to pass framebuffer parameters from shared code to the
* platform API and also to enumerate and select available framebuffer configs.
*/ */
struct _GLFWfbconfig struct _GLFWfbconfig
{ {
@ -199,7 +196,6 @@ struct _GLFWfbconfig
GLboolean stereo; GLboolean stereo;
int samples; int samples;
GLboolean sRGB; GLboolean sRGB;
GLFWintptr platformID;
}; };
@ -671,18 +667,6 @@ void _glfwSplitBPP(int bpp, int* red, int* green, int* blue);
*/ */
int _glfwStringInExtensionString(const char* string, const GLubyte* extensions); int _glfwStringInExtensionString(const char* string, const GLubyte* extensions);
/*! @brief Chooses the framebuffer config that best matches the desired one.
* @param[in] desired The desired framebuffer config.
* @param[in] alternatives The framebuffer configs supported by the system.
* @param[in] count The number of entries in the alternatives array.
* @return The framebuffer config most closely matching the desired one, or @c
* NULL if none fulfilled the hard constraints of the desired values.
* @ingroup utility
*/
const _GLFWfbconfig* _glfwChooseFBConfig(const _GLFWfbconfig* desired,
const _GLFWfbconfig* alternatives,
unsigned int count);
/*! @brief Checks and reads back properties from the current context. /*! @brief Checks and reads back properties from the current context.
* @return @c GL_TRUE if successful, or @c GL_FALSE if the context is unusable. * @return @c GL_TRUE if successful, or @c GL_FALSE if the context is unusable.
* @ingroup utility * @ingroup utility

366
src/wgl_context.c
View File

@ -32,6 +32,7 @@
#include <stdlib.h> #include <stdlib.h>
#include <malloc.h> #include <malloc.h>
#include <assert.h>
//======================================================================== //========================================================================
@ -64,7 +65,7 @@ static void initWGLExtensions(_GLFWwindow* window)
{ {
// This needs to include every function pointer loaded below // This needs to include every function pointer loaded below
window->wgl.SwapIntervalEXT = NULL; window->wgl.SwapIntervalEXT = NULL;
window->wgl.GetPixelFormatAttribivARB = NULL; window->wgl.ChoosePixelFormatARB = NULL;
window->wgl.GetExtensionsStringARB = NULL; window->wgl.GetExtensionsStringARB = NULL;
window->wgl.GetExtensionsStringEXT = NULL; window->wgl.GetExtensionsStringEXT = NULL;
window->wgl.CreateContextAttribsARB = NULL; window->wgl.CreateContextAttribsARB = NULL;
@ -135,215 +136,146 @@ static void initWGLExtensions(_GLFWwindow* window)
if (_glfwPlatformExtensionSupported("WGL_ARB_pixel_format")) if (_glfwPlatformExtensionSupported("WGL_ARB_pixel_format"))
{ {
window->wgl.GetPixelFormatAttribivARB = (PFNWGLGETPIXELFORMATATTRIBIVARBPROC) window->wgl.ChoosePixelFormatARB = (PFNWGLCHOOSEPIXELFORMATARBPROC)
wglGetProcAddress("wglGetPixelFormatAttribivARB"); wglGetProcAddress("wglChoosePixelFormatARB");
if (window->wgl.GetPixelFormatAttribivARB) if (window->wgl.ChoosePixelFormatARB)
window->wgl.ARB_pixel_format = GL_TRUE; window->wgl.ARB_pixel_format = GL_TRUE;
} }
} }
//======================================================================== //////////////////////////////////////////////////////////////////////////
// Returns the specified attribute of the specified pixel format ////// GLFW internal API //////
// 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 // Prepare for creation of the OpenGL context
//========================================================================
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)
{
_glfwInputError(GLFW_API_UNAVAILABLE, "WGL: No pixel formats found");
return NULL;
}
fbconfigs = (_GLFWfbconfig*) malloc(sizeof(_GLFWfbconfig) * available);
if (!fbconfigs)
{
_glfwInputError(GLFW_OUT_OF_MEMORY, NULL);
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;
if (window->wgl.ARB_framebuffer_sRGB)
f->sRGB = getPixelFormatAttrib(window, i, WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB);
else
f->sRGB = GL_FALSE;
}
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;
// PFD pixel formats do not support sRGB
f->sRGB = GL_FALSE;
}
f->platformID = i;
(*found)++;
}
if (*found == 0)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"Win32/WGL: No usable pixel formats found");
free(fbconfigs);
return NULL;
}
return fbconfigs;
}
//========================================================================
// Creates an OpenGL context on the specified device context
//======================================================================== //========================================================================
#define setWGLattrib(attribName, attribValue) \ #define setWGLattrib(attribName, attribValue) \
{ \
attribs[index++] = attribName; \ attribs[index++] = attribName; \
attribs[index++] = attribValue; attribs[index++] = attribValue; \
assert(index < sizeof(attribs) / sizeof(attribs[0])); \
}
static GLboolean createContext(_GLFWwindow* window, int _glfwCreateContext(_GLFWwindow* window,
const _GLFWwndconfig* wndconfig, const _GLFWwndconfig* wndconfig,
int pixelFormat) const _GLFWfbconfig* fbconfig)
{ {
int attribs[40]; int attribs[40];
int pixelFormat;
PIXELFORMATDESCRIPTOR pfd; PIXELFORMATDESCRIPTOR pfd;
HGLRC share = NULL; HGLRC share = NULL;
if (wndconfig->share) if (wndconfig->share)
share = wndconfig->share->wgl.context; share = wndconfig->share->wgl.context;
window->wgl.dc = GetDC(window->win32.handle);
if (!window->wgl.dc)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"Win32: Failed to retrieve DC for window");
return GL_FALSE;
}
if (window->wgl.ARB_pixel_format)
{
int index = 0;
UINT count;
setWGLattrib(WGL_SUPPORT_OPENGL_ARB, TRUE);
setWGLattrib(WGL_DRAW_TO_WINDOW_ARB, TRUE);
setWGLattrib(WGL_PIXEL_TYPE_ARB, WGL_TYPE_RGBA_ARB);
setWGLattrib(WGL_DOUBLE_BUFFER_ARB, TRUE);
if (fbconfig->redBits)
setWGLattrib(WGL_RED_BITS_ARB, fbconfig->redBits);
if (fbconfig->greenBits)
setWGLattrib(WGL_GREEN_BITS_ARB, fbconfig->greenBits);
if (fbconfig->blueBits)
setWGLattrib(WGL_BLUE_BITS_ARB, fbconfig->blueBits);
if (fbconfig->alphaBits)
setWGLattrib(WGL_BLUE_BITS_ARB, fbconfig->alphaBits);
if (fbconfig->depthBits)
setWGLattrib(WGL_DEPTH_BITS_ARB, fbconfig->depthBits);
if (fbconfig->stencilBits)
setWGLattrib(WGL_STENCIL_BITS_ARB, fbconfig->stencilBits);
if (fbconfig->auxBuffers)
setWGLattrib(WGL_AUX_BUFFERS_ARB, fbconfig->auxBuffers);
if (fbconfig->accumRedBits)
setWGLattrib(WGL_ACCUM_RED_BITS_ARB, fbconfig->accumRedBits);
if (fbconfig->accumGreenBits)
setWGLattrib(WGL_ACCUM_GREEN_BITS_ARB, fbconfig->accumGreenBits);
if (fbconfig->accumBlueBits)
setWGLattrib(WGL_ACCUM_BLUE_BITS_ARB, fbconfig->accumBlueBits);
if (fbconfig->accumAlphaBits)
setWGLattrib(WGL_ACCUM_BLUE_BITS_ARB, fbconfig->accumAlphaBits);
if (fbconfig->stereo)
setWGLattrib(WGL_STEREO_ARB, TRUE);
if (window->wgl.ARB_multisample)
{
if (fbconfig->samples)
{
setWGLattrib(WGL_SAMPLE_BUFFERS_ARB, 1);
setWGLattrib(WGL_SAMPLES_ARB, fbconfig->samples);
}
}
if (window->wgl.ARB_framebuffer_sRGB)
{
if (fbconfig->sRGB)
setWGLattrib(WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB, TRUE);
}
setWGLattrib(0, 0);
if (!window->wgl.ChoosePixelFormatARB(window->wgl.dc,
attribs,
NULL,
1,
&pixelFormat,
&count))
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"WGL: Failed to find a suitable pixel format");
return GL_FALSE;
}
}
else
{
ZeroMemory(&pfd, sizeof(pfd));
pfd.nSize = sizeof(pfd);
pfd.nVersion = 1;
pfd.dwFlags |= PFD_DRAW_TO_WINDOW |
PFD_SUPPORT_OPENGL |
PFD_DOUBLEBUFFER;
if (fbconfig->stereo)
pfd.dwFlags |= PFD_STEREO;
pfd.iPixelType = PFD_TYPE_RGBA;
pfd.cColorBits = fbconfig->redBits +
fbconfig->greenBits +
fbconfig->blueBits;
pfd.cAlphaBits = fbconfig->alphaBits;
pfd.cAccumBits = fbconfig->accumRedBits +
fbconfig->accumGreenBits +
fbconfig->accumBlueBits;
pfd.cDepthBits = fbconfig->depthBits;
pfd.cStencilBits = fbconfig->stencilBits;
pfd.cAuxBuffers = fbconfig->auxBuffers;
pixelFormat = ChoosePixelFormat(window->wgl.dc, &pfd);
}
if (!DescribePixelFormat(window->wgl.dc, pixelFormat, sizeof(pfd), &pfd)) if (!DescribePixelFormat(window->wgl.dc, pixelFormat, sizeof(pfd), &pfd))
{ {
_glfwInputError(GLFW_PLATFORM_ERROR, _glfwInputError(GLFW_PLATFORM_ERROR,
@ -352,6 +284,14 @@ static GLboolean createContext(_GLFWwindow* window,
return GL_FALSE; return GL_FALSE;
} }
if (!(pfd.dwFlags & PFD_GENERIC_ACCELERATED) &&
(pfd.dwFlags & PFD_GENERIC_FORMAT))
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"Win32: Failed to find an accelerated pixel format");
return GL_FALSE;
}
if (!SetPixelFormat(window->wgl.dc, pixelFormat, &pfd)) if (!SetPixelFormat(window->wgl.dc, pixelFormat, &pfd))
{ {
_glfwInputError(GLFW_PLATFORM_ERROR, _glfwInputError(GLFW_PLATFORM_ERROR,
@ -453,56 +393,6 @@ static GLboolean createContext(_GLFWwindow* window,
#undef setWGLattrib #undef setWGLattrib
//////////////////////////////////////////////////////////////////////////
////// 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)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"Win32: 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)
return GL_FALSE;
result = _glfwChooseFBConfig(fbconfig, fbconfigs, fbcount);
if (!result)
{
_glfwInputError(GLFW_FORMAT_UNAVAILABLE,
"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 // Destroy the OpenGL context
//======================================================================== //========================================================================

2
src/wgl_platform.h
View File

@ -56,7 +56,7 @@ typedef struct _GLFWcontextWGL
// Platform specific extensions (context specific) // Platform specific extensions (context specific)
PFNWGLSWAPINTERVALEXTPROC SwapIntervalEXT; PFNWGLSWAPINTERVALEXTPROC SwapIntervalEXT;
PFNWGLGETPIXELFORMATATTRIBIVARBPROC GetPixelFormatAttribivARB; PFNWGLCHOOSEPIXELFORMATARBPROC ChoosePixelFormatARB;
PFNWGLGETEXTENSIONSSTRINGEXTPROC GetExtensionsStringEXT; PFNWGLGETEXTENSIONSSTRINGEXTPROC GetExtensionsStringEXT;
PFNWGLGETEXTENSIONSSTRINGARBPROC GetExtensionsStringARB; PFNWGLGETEXTENSIONSSTRINGARBPROC GetExtensionsStringARB;
PFNWGLCREATECONTEXTATTRIBSARBPROC CreateContextAttribsARB; PFNWGLCREATECONTEXTATTRIBSARBPROC CreateContextAttribsARB;