EGLAPI EGLBoolean EGLAPIENTRY eglGetConfigAttrib(EGLDisplay dpy, EGLConfig config, EGLint attribute, EGLint *value)
{
CLIENT_THREAD_STATE_T *thread;
CLIENT_PROCESS_STATE_T *process;
EGLBoolean result;
if (CLIENT_LOCK_AND_GET_STATES(dpy, &thread, &process))
{
if (!value) {
thread->error = EGL_BAD_PARAMETER;
result = EGL_FALSE;
} else if (egl_config_to_id(config) < 0 || egl_config_to_id(config) >= EGL_MAX_CONFIGS) {
thread->error = EGL_BAD_CONFIG;
result = EGL_FALSE;
} else if (!egl_config_get_attrib(egl_config_to_id(config), attribute, value)) {
thread->error = EGL_BAD_ATTRIBUTE;
result = EGL_FALSE;
} else {
thread->error = EGL_SUCCESS;
result = EGL_TRUE;
}
CLIENT_UNLOCK();
}
else
result = EGL_FALSE;
return result;
}
bool egl_config_filter(int id, const EGLint *attrib_list)
{
if (!attrib_list)
return true;
while (*attrib_list != EGL_NONE) {
EGLint name = *attrib_list++;
EGLint value = *attrib_list++;
EGLint actual_value;
if (!egl_config_get_attrib(id, name, &actual_value) )
{
UNREACHABLE();
return false;
}
switch (name) {
/* Selection Criteria: AtLeast */
case EGL_BUFFER_SIZE:
case EGL_RED_SIZE:
case EGL_GREEN_SIZE:
case EGL_BLUE_SIZE:
case EGL_LUMINANCE_SIZE:
case EGL_ALPHA_SIZE:
case EGL_ALPHA_MASK_SIZE:
case EGL_DEPTH_SIZE:
case EGL_SAMPLE_BUFFERS:
case EGL_SAMPLES:
case EGL_STENCIL_SIZE:
if (value != EGL_DONT_CARE && value > actual_value)
return false;
break;
/* Selection Criteria: Exact */
/*
Excluding EGL_TRANSPARENT_x_VALUE and EGL_MATCH_FORMAT_KHR which are listed in
the table as Exact, but seem to have special rules attached to them.
Excluding EGL_NATIVE_VISUAL_TYPE which is in the ignore list
Excluding EGL_LEVEL because EGL_DONT_CARE is not allowed
*/
case EGL_BIND_TO_TEXTURE_RGB:
case EGL_BIND_TO_TEXTURE_RGBA:
case EGL_COLOR_BUFFER_TYPE:
case EGL_CONFIG_CAVEAT:
case EGL_CONFIG_ID:
case EGL_MAX_SWAP_INTERVAL:
case EGL_MIN_SWAP_INTERVAL:
case EGL_NATIVE_RENDERABLE:
case EGL_TRANSPARENT_TYPE:
#if EGL_ANDROID_recordable
case EGL_RECORDABLE_ANDROID:
#endif
if (value != EGL_DONT_CARE && value != actual_value)
return false;
break;
case EGL_LEVEL:
if (value != actual_value)
return false;
break;
/* Selection Criteria: Mask */
case EGL_CONFORMANT:
case EGL_RENDERABLE_TYPE:
case EGL_SURFACE_TYPE:
if (value != EGL_DONT_CARE && (value & ~actual_value))
return false;
break;
/* Selection Criteria: Special */
case EGL_MATCH_NATIVE_PIXMAP:
if (value != EGL_DONT_CARE) { /* see comments in egl_config_check_attribs */
EGLNativePixmapType pixmap = (EGLNativePixmapType)(intptr_t)value;
KHRN_IMAGE_WRAP_T image;
if (!platform_get_pixmap_info(pixmap, &image)) {
/*
Not actually unreachable in theory!
We should have detected this in egl_config_check_attribs
It's possible that the validity of pixmap has changed since then however...
*/
UNREACHABLE();
return false;
}
if (!egl_config_match_pixmap_info(id, &image) ||
!platform_match_pixmap_api_support(pixmap, egl_config_get_api_support(id)))
{
khrn_platform_release_pixmap_info(pixmap, &image);
return false;
}
khrn_platform_release_pixmap_info(pixmap, &image);
}
break;
#if EGL_KHR_lock_surface
case EGL_MATCH_FORMAT_KHR:
if (!(value == EGL_DONT_CARE || value == actual_value
|| (value == EGL_FORMAT_RGB_565_KHR && actual_value == EGL_FORMAT_RGB_565_EXACT_KHR)
|| (value == EGL_FORMAT_RGBA_8888_KHR && actual_value == EGL_FORMAT_RGBA_8888_EXACT_KHR)))
{
return false;
}
break;
#endif
/* Attributes we can completely ignore */
case EGL_MAX_PBUFFER_WIDTH:
case EGL_MAX_PBUFFER_HEIGHT:
case EGL_MAX_PBUFFER_PIXELS:
case EGL_NATIVE_VISUAL_ID:
/*
"If EGL_MAX_PBUFFER_WIDTH, EGL_MAX_PBUFFER_HEIGHT,
EGL_MAX_PBUFFER_PIXELS, or EGL_NATIVE_VISUAL_ID are specified in
attrib_list, then they are ignored"
*/
case EGL_NATIVE_VISUAL_TYPE:
/*
"if there are no native visual types, then the EGL NATIVE VISUAL TYPE attribute is
ignored."
*/
case EGL_TRANSPARENT_BLUE_VALUE:
case EGL_TRANSPARENT_GREEN_VALUE:
case EGL_TRANSPARENT_RED_VALUE:
/*
"If EGL_TRANSPARENT_TYPE is set to EGL_NONE in attrib_list, then
the EGL_TRANSPARENT_RED_VALUE, EGL_TRANSPARENT_GREEN_VALUE, and
EGL_TRANSPARENT_BLUE_VALUE attributes are ignored."
Possible spec deviation if EGL_TRANSPARENT_TYPE is specified as EGL_DONT_CARE
and EGL_TRANSPARENT_*_VALUE is also specified?
*/
break;
default:
UNREACHABLE();
break;
}
}
return true;
}
