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Add OpenGL 3.X context creation support

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Matthias Bentrup 2011-10-30 03:58:24 PDT

I've updated the context creation patch to include the bugfixes by Martin
Schreiber and also included a profile bit to request a ES2 compatible profile.

The wgl context creation may use 2 call to wglChoosePixelFormat if no
acceleration attribute is selected, this should work around a bug with buggy
AMD drivers (see #1254).
This commit is contained in:
Sam Lantinga 2012-02-20 23:37:57 -05:00
parent e4461d199e
commit 38463b3a0c
5 changed files with 144 additions and 22 deletions
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72
src/video/x11/SDL_x11opengl.c
View file

@ -67,11 +67,6 @@
#define GLX_CONTEXT_DEBUG_BIT_ARB 0x0001
#define GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x0002
#ifndef GLX_EXT_swap_control
#define GLX_SWAP_INTERVAL_EXT 0x20F1
#define GLX_MAX_SWAP_INTERVAL_EXT 0x20F2
#endif
/* Typedef for the GL 3.0 context creation function */
typedef GLXContext(*PFNGLXCREATECONTEXTATTRIBSARBPROC) (Display * dpy,
GLXFBConfig config,
@ -80,6 +75,31 @@ typedef GLXContext(*PFNGLXCREATECONTEXTATTRIBSARBPROC) (Display * dpy,
Bool direct,
const int
*attrib_list);
#ifndef GLX_ARB_create_context_profile
#define GLX_ARB_create_context_profile
#define GLX_CONTEXT_PROFILE_MASK_ARB 0x9126
#define GLX_CONTEXT_CORE_PROFILE_BIT_ARB 0x00000001
#define GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB 0x00000002
#endif
#ifndef GLX_ARB_create_context_robustness
#define GLX_ARB_create_context_robustness
#define GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB 0x00000004
#define GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB 0x8256
#define GLX_NO_RESET_NOTIFICATION_ARB 0x8261
#define GLX_LOSE_CONTEXT_ON_RESET_ARB 0x8252
#endif
#endif
#ifndef GLX_EXT_create_context_es2_profile
#define GLX_EXT_create_context_es2_profile
#define GLX_CONTEXT_ES2_PROFILE_BIT_EXT 0x00000002
#endif
#ifndef GLX_EXT_swap_control
#define GLX_SWAP_INTERVAL_EXT 0x20F1
#define GLX_MAX_SWAP_INTERVAL_EXT 0x20F2
#endif
#define OPENGL_REQUIRES_DLOPEN
@ -305,8 +325,11 @@ X11_GL_InitExtensions(_THIS)
X11_PumpEvents(_this);
}
/* glXChooseVisual and glXChooseFBConfig have some small differences in
* the attribute encoding, it can be chosen with the for_FBConfig parameter.
*/
int
X11_GL_GetAttributes(_THIS, Display * display, int screen, int * attribs, int size)
X11_GL_GetAttributes(_THIS, Display * display, int screen, int * attribs, int size, Bool for_FBConfig)
{
int i = 0;
@ -314,7 +337,12 @@ X11_GL_GetAttributes(_THIS, Display * display, int screen, int * attribs, int si
SDL_assert(size >= 32);
/* Setup our GLX attributes according to the gl_config. */
attribs[i++] = GLX_RGBA;
if( for_FBConfig ) {
attribs[i++] = GLX_RENDER_TYPE;
attribs[i++] = GLX_RGBA_BIT;
} else {
attribs[i++] = GLX_RGBA;
}
attribs[i++] = GLX_RED_SIZE;
attribs[i++] = _this->gl_config.red_size;
attribs[i++] = GLX_GREEN_SIZE;
@ -329,6 +357,8 @@ X11_GL_GetAttributes(_THIS, Display * display, int screen, int * attribs, int si
if (_this->gl_config.double_buffer) {
attribs[i++] = GLX_DOUBLEBUFFER;
if( for_FBConfig )
attribs[i++] = True;
}
attribs[i++] = GLX_DEPTH_SIZE;
@ -361,6 +391,8 @@ X11_GL_GetAttributes(_THIS, Display * display, int screen, int * attribs, int si
if (_this->gl_config.stereo) {
attribs[i++] = GLX_STEREO;
if( for_FBConfig )
attribs[i++] = True;
}
if (_this->gl_config.multisamplebuffers) {
@ -391,10 +423,8 @@ X11_GL_GetVisual(_THIS, Display * display, int screen)
XVisualInfo *vinfo;
/* 64 seems nice. */
const int max_attrs = 64;
int attribs[max_attrs];
const int i = X11_GL_GetAttributes(_this,display,screen,attribs,max_attrs);
SDL_assert(i <= max_attrs);
int attribs[64];
int i = X11_GL_GetAttributes(_this,display,screen,attribs,64,SDL_FALSE);
if (!_this->gl_data) {
/* The OpenGL library wasn't loaded, SDL_GetError() should have info */
@ -439,13 +469,29 @@ X11_GL_CreateContext(_THIS, SDL_Window * window)
SDL_SetError("Could not create GL context");
return NULL;
} else {
int attribs[] = {
/* max 8 attributes plus terminator */
int attribs[9] = {
GLX_CONTEXT_MAJOR_VERSION_ARB,
_this->gl_config.major_version,
GLX_CONTEXT_MINOR_VERSION_ARB,
_this->gl_config.minor_version,
0
};
int iattr = 4;
/* SDL profile bits match GLX profile bits */
if( _this->gl_config.profile_mask != 0 ) {
attribs[iattr++] = GLX_CONTEXT_PROFILE_MASK_ARB;
attribs[iattr++] = _this->gl_config.profile_mask;
}
/* SDL flags match GLX flags */
if( _this->gl_config.flags != 0 ) {
attribs[iattr++] = GLX_CONTEXT_FLAGS_ARB;
attribs[iattr++] = _this->gl_config.flags;
}
attribs[iattr++] = 0;
/* Get a pointer to the context creation function for GL 3.0 */
PFNGLXCREATECONTEXTATTRIBSARBPROC glXCreateContextAttribs =
@ -472,7 +518,7 @@ X11_GL_CreateContext(_THIS, SDL_Window * window)
int *)) _this->gl_data->
glXGetProcAddress((GLubyte *) "glXChooseFBConfig");
X11_GL_GetAttributes(_this,display,screen,glxAttribs,64);
X11_GL_GetAttributes(_this,display,screen,glxAttribs,64,SDL_TRUE);
if (!glXChooseFBConfig
|| !(framebuffer_config =