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/*
(c) Copyright 2001-2009 The world wide DirectFB Open Source Community (directfb.org)
(c) Copyright 2000-2004 Convergence (integrated media) GmbH
All rights reserved.
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 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, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include <stdio.h>
#include <directfb.h>
#include <direct/debug.h>
#include <direct/messages.h>
#include <core/gfxcard.h>
#include <core/system.h>
#include <misc/conf.h>
#include <GL/glx.h>
#include <x11/x11.h>
#include "gl_2d.h"
#include "gl_gfxdriver.h"
D_DEBUG_DOMAIN( GL_Driver, "GL/Driver", "GL graphics driver for X11" );
#include <core/graphics_driver.h>
DFB_GRAPHICS_DRIVER( gl )
static int error_code = 0;
/**********************************************************************************************************************/
static int
error_handler( Display *display, XErrorEvent *event )
{
char buf[512];
XGetErrorText( display, event->error_code, buf, sizeof(buf) );
D_ERROR( "GL/Driver: Error! %s\n", buf );
error_code = event->error_code;
return 0;
}
/**********************************************************************************************************************/
static int
driver_probe( CoreGraphicsDevice *device )
{
switch (dfb_system_type()) {
case CORE_X11: {
int ee;
DFBX11 *x11 = dfb_system_data();
return glXQueryExtension( x11->display, &ee, &ee );
}
default:
break;
}
return 0;
}
static void
driver_get_info( CoreGraphicsDevice *device,
GraphicsDriverInfo *info )
{
/* fill driver info structure */
snprintf( info->name,
DFB_GRAPHICS_DRIVER_INFO_NAME_LENGTH,
"OpenGL Driver" );
snprintf( info->vendor,
DFB_GRAPHICS_DRIVER_INFO_VENDOR_LENGTH,
"Denis Oliver Kropp" );
info->version.major = 0;
info->version.minor = 5;
info->driver_data_size = sizeof(GLDriverData);
info->device_data_size = sizeof(GLDeviceData);
}
static DFBResult
driver_init_driver( CoreGraphicsDevice *device,
GraphicsDeviceFuncs *funcs,
void *driver_data,
void *device_data,
CoreDFB *core )
{
D_DEBUG_AT( GL_Driver, "%s()\n", __FUNCTION__ );
/* initialize function pointers */
funcs->EngineSync = glEngineSync;
funcs->EngineReset = glEngineReset;
funcs->EmitCommands = glEmitCommands;
funcs->CheckState = glCheckState;
funcs->SetState = glSetState;
funcs->FillRectangle = glFillRectangle;
funcs->DrawRectangle = glDrawRectangle;
funcs->DrawLine = glDrawLine;
funcs->FillTriangle = glFillTriangle;
funcs->Blit = glBlit;
funcs->StretchBlit = glStretchBlit;
/* Choose accelerated font format */
if (!dfb_config->software_only) {
dfb_config->font_format = DSPF_ARGB;
dfb_config->font_premult = true;
}
return DFB_OK;
}
static DFBResult
driver_init_device( CoreGraphicsDevice *device,
GraphicsDeviceInfo *device_info,
void *driver_data,
void *device_data )
{
const char *renderer;
Display *display;
XVisualInfo *visual;
GLXContext context;
DFBX11 *x11;
int attr[] = {
GLX_RGBA,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
None
};
D_DEBUG_AT( GL_Driver, "%s()\n", __FUNCTION__ );
XSetErrorHandler( error_handler );
error_code = 0;
x11 = dfb_system_data();
display = x11->display;
visual = glXChooseVisual( display, DefaultScreen(display), attr );
if (!visual || error_code) {
D_ERROR( "GL/Driver: Could not find a suitable visual!\n" );
return DFB_INIT;
}
context = glXCreateContext( display, visual, NULL, GL_TRUE );
if (!context || error_code) {
D_ERROR( "GL/Driver: Could not create a context!\n" );
return DFB_INIT;
}
glXMakeCurrent( display, RootWindowOfScreen(DefaultScreenOfDisplay(display)), context );
if( error_code )
return DFB_INIT;
renderer = (const char*) glGetString( GL_RENDERER );
glXMakeCurrent( display, None, NULL );
/* fill device info */
snprintf( device_info->vendor, DFB_GRAPHICS_DEVICE_INFO_VENDOR_LENGTH, "OpenGL Acceleration -" );
snprintf( device_info->name, DFB_GRAPHICS_DEVICE_INFO_NAME_LENGTH, "%s", renderer ?: "Unknown" );
glXDestroyContext( display, context );
/* device limitations */
device_info->limits.surface_byteoffset_alignment = 8;
device_info->limits.surface_bytepitch_alignment = 8;
device_info->caps.flags = CCF_CLIPPING | CCF_RENDEROPTS;
device_info->caps.accel = GL_SUPPORTED_DRAWINGFUNCTIONS |
GL_SUPPORTED_BLITTINGFUNCTIONS;
device_info->caps.drawing = GL_SUPPORTED_DRAWINGFLAGS;
device_info->caps.blitting = GL_SUPPORTED_BLITTINGFLAGS;
return DFB_OK;
}
static void
driver_close_device( CoreGraphicsDevice *device,
void *driver_data,
void *device_data )
{
}
static void
driver_close_driver( CoreGraphicsDevice *device,
void *driver_data )
{
}
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