mirror of https://github.com/xemu-project/xemu.git
145 lines
4.4 KiB
C
145 lines
4.4 KiB
C
/*
|
|
* Offscreen OpenGL abstraction layer - GLX (X11) specific
|
|
*
|
|
* Copyright (c) 2013 Wayo
|
|
* Copyright (c) 2014 JayFoxRox
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include "qemu-common.h"
|
|
|
|
#include <GL/glew.h>
|
|
#include <GL/glx.h>
|
|
#include <GL/glut.h>
|
|
#include <X11/Xlib.h>
|
|
|
|
#include "gloffscreen.h"
|
|
|
|
struct _GloContext {
|
|
GLXDrawable glx_drawable;
|
|
GLXContext glx_context;
|
|
};
|
|
|
|
static Display* x_display;
|
|
|
|
|
|
/* Create an OpenGL context for a certain pixel format. formatflags are from
|
|
* the GLO_ constants */
|
|
GloContext *glo_context_create(int formatFlags)
|
|
{
|
|
|
|
static bool initialized = false;
|
|
|
|
if (!initialized) {
|
|
x_display = XOpenDisplay(0);
|
|
printf("gloffscreen: GLX_VERSION = %s\n", glXGetClientString(x_display, GLX_VERSION));
|
|
printf("gloffscreen: GLX_VENDOR = %s\n", glXGetClientString(x_display, GLX_VENDOR));
|
|
} else {
|
|
printf("gloffscreen already inited\n");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
GloContext *context = (GloContext *)g_malloc0(sizeof(GloContext));
|
|
|
|
int rgbaBits[4];
|
|
glo_flags_get_rgba_bits(formatFlags, rgbaBits);
|
|
|
|
int fb_attribute_list[] = {
|
|
GLX_RENDER_TYPE, GLX_RGBA_BIT,
|
|
GLX_RED_SIZE, rgbaBits[0],
|
|
GLX_GREEN_SIZE, rgbaBits[1],
|
|
GLX_BLUE_SIZE, rgbaBits[2],
|
|
GLX_ALPHA_SIZE, rgbaBits[3],
|
|
GLX_DEPTH_SIZE, glo_flags_get_depth_bits(formatFlags),
|
|
GLX_STENCIL_SIZE, glo_flags_get_stencil_bits(formatFlags),
|
|
GLX_DRAWABLE_TYPE, GLX_PBUFFER_BIT,
|
|
None
|
|
};
|
|
|
|
int nelements;
|
|
GLXFBConfig* configs = glXChooseFBConfig(x_display, DefaultScreen(x_display), fb_attribute_list, &nelements);
|
|
if (configs == NULL) { return NULL; }
|
|
if (nelements == 0) { return NULL; }
|
|
|
|
#if 1
|
|
/* Tiny surface because apitrace doesn't handle no surface yet */
|
|
int surface_attribute_list[] = {
|
|
GLX_PBUFFER_WIDTH,16,
|
|
GLX_PBUFFER_HEIGHT,16,
|
|
GLX_LARGEST_PBUFFER, True,
|
|
None
|
|
};
|
|
context->glx_drawable = glXCreatePbuffer(x_display, configs[0], surface_attribute_list);
|
|
if (context->glx_drawable == None) { return NULL; }
|
|
#else
|
|
context->glx_drawable = None;
|
|
#endif
|
|
|
|
/* Create GLX context */
|
|
context->glx_context = glXCreateNewContext(x_display, configs[0], GLX_RGBA_TYPE, NULL, True);
|
|
if (context->glx_context == NULL) return NULL;
|
|
glo_set_current(context);
|
|
|
|
if (!initialized) {
|
|
/* Initialize glew */
|
|
if (GLEW_OK != glewInit()) {
|
|
/* GLEW failed! */
|
|
printf("Glew init failed.");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
initialized = true;
|
|
return context;
|
|
}
|
|
|
|
/* Check if an extension is available. */
|
|
GLboolean glo_check_extension(const GLubyte *extName,
|
|
const GLubyte *extString)
|
|
{
|
|
return gluCheckExtension(extName, extString);
|
|
}
|
|
|
|
void* glo_get_extension_proc(const GLubyte *extProc)
|
|
{
|
|
return glXGetProcAddress(extProc);
|
|
}
|
|
|
|
/* Set current context */
|
|
void glo_set_current(GloContext *context)
|
|
{
|
|
if (context == NULL) {
|
|
glXMakeCurrent(x_display, None, NULL);
|
|
} else {
|
|
glXMakeCurrent(x_display, context->glx_drawable, context->glx_context);
|
|
}
|
|
}
|
|
|
|
/* Destroy a previously created OpenGL context */
|
|
void glo_context_destroy(GloContext *context)
|
|
{
|
|
if (!context) { return; }
|
|
glo_set_current(NULL);
|
|
glXDestroyContext(x_display, context->glx_context);
|
|
}
|
|
|