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// Copyright 2012 Intel Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "glx_config.h"
#include <stdlib.h>
#include <string.h>
#include <waffle/native.h>
#include <waffle/waffle_enum.h>
#include <waffle/core/wcore_config_attrs.h>
#include <waffle/core/wcore_error.h>
#include "glx_priv_types.h"
union native_config*
glx_config_choose(
union native_display *dpy,
const struct wcore_config_attrs *attrs)
{
bool ok = true;
GLXFBConfig *configs = NULL;
int num_configs;
XVisualInfo *vi = NULL;
int attrib_list[] = {
GLX_BUFFER_SIZE, attrs->color_buffer_size,
GLX_RED_SIZE, attrs->red_size,
GLX_GREEN_SIZE, attrs->green_size,
GLX_BLUE_SIZE, attrs->blue_size,
GLX_ALPHA_SIZE, attrs->alpha_size,
GLX_DEPTH_SIZE, attrs->depth_size,
GLX_STENCIL_SIZE, attrs->stencil_size,
GLX_SAMPLE_BUFFERS, attrs->sample_buffers,
GLX_SAMPLES, attrs->samples,
GLX_DOUBLEBUFFER, attrs->double_buffered,
// According to the GLX 1.4 spec Table 3.4, the default value of
// GLX_DRAWABLE_TYPE is GLX_WINDOW_BIT. Explicitly set the default
// here for the sake of self-documentation.
GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT,
0,
};
union native_config *self;
NATIVE_ALLOC(self, glx);
if (!self) {
wcore_error(WAFFLE_OUT_OF_MEMORY);
return NULL;
}
self->glx->display = dpy;
// Set glx_fbconfig.
configs = glXChooseFBConfig(dpy->glx->xlib_display,
DefaultScreen(dpy->glx->xlib_display),
attrib_list,
&num_configs);
if (!configs || num_configs == 0) {
wcore_errorf(WAFFLE_UNKNOWN_ERROR,
"glXChooseFBConfig returned no matching configs");
goto error;
}
// Simply take the first.
self->glx->glx_fbconfig = configs[0];
// Set glx_fbconfig_id.
ok = !glXGetFBConfigAttrib(dpy->glx->xlib_display,
self->glx->glx_fbconfig,
GLX_FBCONFIG_ID,
&self->glx->glx_fbconfig_id);
if (!ok) {
wcore_errorf(WAFFLE_UNKNOWN_ERROR, "glxGetFBConfigAttrib failed");
goto error;
}
// Set xcb_visual_id.
vi = glXGetVisualFromFBConfig(dpy->glx->xlib_display,
self->glx->glx_fbconfig);
if (!vi) {
wcore_errorf(WAFFLE_UNKNOWN_ERROR,
"glXGetVisualInfoFromFBConfig failed with "
"GLXFBConfigID=0x%x\n", self->glx->glx_fbconfig_id);
goto error;
}
self->glx->xcb_visual_id = vi->visualid;
goto end;
error:
WCORE_ERROR_DISABLED({
glx_config_destroy(self);
self = NULL;
});
end:
if (configs)
XFree(configs);
if (vi)
XFree(vi);
return self;
}
bool
glx_config_destroy(union native_config *self)
{
free(self);
return true;
}
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