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// Copyright 2012 Intel Corporation
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// - Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
//
// - Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#define GLX_GLXEXT_PROTOTYPES
#include <assert.h>
#include <stdlib.h>
#include <waffle/waffle_enum.h>
#include <waffle/core/wcore_error.h>
#include "glx_config.h"
#include "glx_context.h"
#include "glx_display.h"
#include "glx_platform.h"
static const struct wcore_context_vtbl glx_context_wcore_vtbl;
enum {
WAFFLE_GLX_CONTEXT_ATTRS_LENGTH = 7,
};
static bool
glx_context_destroy(struct wcore_context *wc_self)
{
struct glx_context *self;
struct glx_display *dpy;
bool ok = true;
if (!wc_self)
return ok;
self = glx_context(wc_self);
dpy = glx_display(wc_self->display);
if (self->glx)
glXDestroyContext(dpy->x11.xlib, self->glx);
ok &= wcore_context_teardown(wc_self);
free(self);
return ok;
}
/// @brief Fill @a attrib_list, which will be given to glXCreateContextAttribsARB().
///
/// This does not validate the `config->context_*` attributes. That validation
/// occurred during waffle_config_choose().
static bool
glx_context_fill_attrib_list(struct glx_config *config,
int attrib_list[])
{
struct glx_display *dpy = glx_display(config->wcore.display);
int i = 0;
attrib_list[i++] = GLX_CONTEXT_MAJOR_VERSION_ARB;
attrib_list[i++] = config->waffle_context_major_version;
attrib_list[i++] = GLX_CONTEXT_MINOR_VERSION_ARB;
attrib_list[i++] = config->waffle_context_minor_version;
if (dpy->extensions.ARB_create_context_profile) {
attrib_list[i++] = GLX_CONTEXT_PROFILE_MASK_ARB;
switch (config->waffle_context_api) {
case WAFFLE_CONTEXT_OPENGL:
switch (config->waffle_context_profile) {
case WAFFLE_CONTEXT_CORE_PROFILE:
attrib_list[i++] = GLX_CONTEXT_CORE_PROFILE_BIT_ARB;
break;
case WAFFLE_CONTEXT_COMPATIBILITY_PROFILE:
attrib_list[i++] = GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB;
break;
case WAFFLE_NONE:
attrib_list[i++] = 0;
break;
}
break;
case WAFFLE_CONTEXT_OPENGL_ES2:
attrib_list[i++] = GLX_CONTEXT_ES2_PROFILE_BIT_EXT;
break;
}
}
attrib_list[i++] = GLX_NONE;
return true;
}
static GLXContext
glx_context_create_native(struct glx_config *config,
struct glx_context *share_ctx)
{
GLXContext ctx;
GLXContext real_share_ctx = share_ctx ? share_ctx->glx : NULL;
struct glx_display *dpy = glx_display(config->wcore.display);
struct glx_platform *platform = glx_platform(dpy->wcore.platform);
if (dpy->extensions.ARB_create_context) {
bool ok;
int attrib_list[WAFFLE_GLX_CONTEXT_ATTRS_LENGTH];
ok = glx_context_fill_attrib_list(config, attrib_list);
if (!ok)
return false;
ctx = platform->glXCreateContextAttribsARB(dpy->x11.xlib,
config->glx_fbconfig,
real_share_ctx,
true /*direct?*/,
attrib_list);
if (!ctx) {
wcore_errorf(WAFFLE_UNKNOWN_ERROR,
"glXCreateContextAttribsARB failed");
return NULL;
}
}
else {
ctx = glXCreateNewContext(dpy->x11.xlib,
config->glx_fbconfig,
GLX_RGBA_TYPE,
real_share_ctx,
true /*direct?*/);
if (!ctx) {
wcore_errorf(WAFFLE_UNKNOWN_ERROR, "glXCreateContext failed");
return NULL;
}
}
return ctx;
}
struct wcore_context*
glx_context_create(struct wcore_platform *wc_plat,
struct wcore_config *wc_config,
struct wcore_context *wc_share_ctx)
{
struct glx_context *self;
struct glx_config *config = glx_config(wc_config);
struct glx_context *share_ctx = glx_context(wc_share_ctx);
bool ok = true;
self = calloc(1, sizeof(*self));
if (!self) {
wcore_error(WAFFLE_OUT_OF_MEMORY);
return NULL;
}
ok = wcore_context_init(&self->wcore, wc_config);
if (!ok)
goto error;
self->glx = glx_context_create_native(config, share_ctx);
if (!self->glx)
goto error;
self->wcore.vtbl = &glx_context_wcore_vtbl;
return &self->wcore;
error:
glx_context_destroy(&self->wcore);
return NULL;
}
static const struct wcore_context_vtbl glx_context_wcore_vtbl = {
.destroy = glx_context_destroy,
};
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