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/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
Copyright (C) 2009 Red Hat, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <X11/Xlib.h>
#include <GL/glx.h>
#include "ogl_ctx.h"
#include "spice_common.h"
enum {
OGLCTX_TYPE_PBUF,
OGLCTX_TYPE_PIXMAP,
};
struct OGLCtx {
int type;
Display *x_display;
GLXContext glx_context;
GLXDrawable drawable;
};
typedef struct OGLPixmapCtx {
OGLCtx base;
Pixmap pixmap;
} OGLPixmapCtx;
const char *oglctx_type_str(OGLCtx *ctx)
{
static const char *pbuf_str = "pbuf";
static const char *pixmap_str = "pixmap";
static const char *invalid_str = "invalid";
switch (ctx->type) {
case OGLCTX_TYPE_PBUF:
return pbuf_str;
case OGLCTX_TYPE_PIXMAP:
return pixmap_str;
default:
return invalid_str;
}
}
void oglctx_make_current(OGLCtx *ctx)
{
if (!glXMakeCurrent(ctx->x_display, ctx->drawable, ctx->glx_context)) {
printf("%s: failed\n", __FUNCTION__);
}
}
OGLCtx *pbuf_create(int width, int heigth)
{
OGLCtx *ctx;
Display *x_display;
int num_configs;
GLXFBConfig *fb_config;
GLXPbuffer glx_pbuf;
GLXContext glx_context;
const int glx_attributes[] = { GLX_RENDER_TYPE, GLX_RGBA_BIT,
GLX_DRAWABLE_TYPE, GLX_PBUFFER_BIT,
GLX_RED_SIZE, 8,
GLX_GREEN_SIZE, 8,
GLX_BLUE_SIZE, 8,
GLX_ALPHA_SIZE, 8,
GLX_STENCIL_SIZE, 4,
0 };
int pbuf_attrib[] = { GLX_PRESERVED_CONTENTS, True,
GLX_PBUFFER_WIDTH, width,
GLX_PBUFFER_HEIGHT, heigth,
GLX_LARGEST_PBUFFER, False,
0, 0 };
if (!(ctx = calloc(1, sizeof(*ctx)))) {
printf("%s: alloc pbuf failed\n", __FUNCTION__);
return NULL;
}
if (!(x_display = XOpenDisplay(NULL))) {
printf("%s: open display failed\n", __FUNCTION__);
goto error_1;
}
if (!(fb_config = glXChooseFBConfig(x_display, 0, glx_attributes, &num_configs)) ||
!num_configs) {
printf("%s: choose fb config failed\n", __FUNCTION__);
goto error_2;
}
if (!(glx_pbuf = glXCreatePbuffer(x_display, fb_config[0], pbuf_attrib))) {
goto error_3;
}
if (!(glx_context = glXCreateNewContext(x_display, fb_config[0], GLX_RGBA_TYPE, NULL, True))) {
printf("%s: create context failed\n", __FUNCTION__);
goto error_4;
}
XFree(fb_config);
ctx->type = OGLCTX_TYPE_PBUF;
ctx->drawable = glx_pbuf;
ctx->glx_context = glx_context;
ctx->x_display = x_display;
return ctx;
error_4:
glXDestroyPbuffer(x_display, glx_pbuf);
error_3:
XFree(fb_config);
error_2:
XCloseDisplay(x_display);
error_1:
free(ctx);
return NULL;
}
OGLCtx *pixmap_create(int width, int heigth)
{
Display *x_display;
int num_configs;
GLXFBConfig *fb_config;
GLXPixmap glx_pixmap;
GLXContext glx_context;
Pixmap pixmap;
int screen;
Window root_window;
OGLPixmapCtx *pix;
const int glx_attributes[] = { GLX_RENDER_TYPE, GLX_RGBA_BIT,
GLX_DRAWABLE_TYPE, GLX_PIXMAP_BIT,
GLX_RED_SIZE, 8,
GLX_GREEN_SIZE, 8,
GLX_BLUE_SIZE, 8,
GLX_ALPHA_SIZE, 8,
GLX_STENCIL_SIZE, 4,
0 };
if (!(pix = calloc(1, sizeof(*pix)))) {
printf("%s: alloc pix failed\n", __FUNCTION__);
return NULL;
}
if (!(x_display = XOpenDisplay(NULL))) {
printf("%s: open display failed\n", __FUNCTION__);
goto error_1;
}
screen = DefaultScreen(x_display);
root_window = RootWindow(x_display, screen);
if (!(fb_config = glXChooseFBConfig(x_display, 0, glx_attributes, &num_configs)) ||
!num_configs) {
printf("%s: choose fb config failed\n", __FUNCTION__);
goto error_2;
}
if (!(pixmap = XCreatePixmap(x_display, root_window, width, heigth, 32 /*use fb config*/))) {
printf("%s: create x pixmap failed\n", __FUNCTION__);
goto error_3;
}
if (!(glx_pixmap = glXCreatePixmap(x_display, fb_config[0], pixmap, NULL))) {
printf("%s: create glx pixmap failed\n", __FUNCTION__);
goto error_4;
}
if (!(glx_context = glXCreateNewContext(x_display, fb_config[0], GLX_RGBA_TYPE, NULL, True))) {
printf("%s: create context failed\n", __FUNCTION__);
goto error_5;
}
XFree(fb_config);
pix->base.type = OGLCTX_TYPE_PIXMAP;
pix->base.x_display = x_display;
pix->base.drawable = glx_pixmap;
pix->base.glx_context = glx_context;
pix->pixmap = pixmap;
return &pix->base;
error_5:
glXDestroyPixmap(x_display, glx_pixmap);
error_4:
XFreePixmap(x_display, pixmap);
error_3:
XFree(fb_config);
error_2:
XCloseDisplay(x_display);
error_1:
free(pix);
return NULL;
}
void oglctx_destroy(OGLCtx *ctx)
{
if (!ctx) {
return;
}
// test is current ?
glXDestroyContext(ctx->x_display, ctx->glx_context);
switch (ctx->type) {
case OGLCTX_TYPE_PBUF:
glXDestroyPbuffer(ctx->x_display, ctx->drawable);
break;
case OGLCTX_TYPE_PIXMAP:
glXDestroyPixmap(ctx->x_display, ctx->drawable);
XFreePixmap(ctx->x_display, ((OGLPixmapCtx *)ctx)->pixmap);
break;
default:
spice_error("invalid ogl ctx type");
}
XCloseDisplay(ctx->x_display);
free(ctx);
}
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