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egl: Ensure that the dummy pbuffer surface is compatible with the supplied context

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In order to be able to make an egl context current when using a
pbuffer surface, that surface must have been created with a config
that is compatible with the context config. For Mesa, this means that
the configs must be the same.
This commit is contained in:
Alexandros Frantzis 2011-02-11 16:11:43 +02:00 • committed by Kristian Høgsberg
parent 3245d6e120
commit 2181a53f61
1 changed files with 16 additions and 10 deletions
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26
src/cairo-egl-context.c
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@ -140,7 +140,7 @@ cairo_egl_device_create (EGLDisplay dpy, EGLContext egl)
EGL_HEIGHT, 1,
EGL_NONE,
};
EGLConfig *configs;
EGLConfig config;
EGLint numConfigs;
ctx = calloc (1, sizeof (cairo_egl_context_t));
@ -158,15 +158,21 @@ cairo_egl_device_create (EGLDisplay dpy, EGLContext egl)
if (!_egl_make_current_surfaceless (ctx)) {
/* Fall back to dummy surface, meh. */
eglGetConfigs (dpy, NULL, 0, &numConfigs);
configs = malloc (sizeof(*configs) *numConfigs);
if (configs == NULL) {
free (ctx);
return _cairo_gl_context_create_in_error (CAIRO_STATUS_NO_MEMORY);
}
eglGetConfigs (dpy, configs, numConfigs, &numConfigs);
ctx->dummy_surface = eglCreatePbufferSurface (dpy, configs[0], attribs);
free (configs);
EGLint config_attribs[] = {
EGL_CONFIG_ID, 0,
EGL_NONE
};
/*
* In order to be able to make an egl context current when using a
* pbuffer surface, that surface must have been created with a config
* that is compatible with the context config. For Mesa, this means
* that the configs must be the same.
*/
eglQueryContext (dpy, egl, EGL_CONFIG_ID, &config_attribs[1]);
eglChooseConfig (dpy, config_attribs, &config, 1, &numConfigs);
ctx->dummy_surface = eglCreatePbufferSurface (dpy, config, attribs);
if (ctx->dummy_surface == NULL) {
free (ctx);