1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/drivers/video_gdk.c	Fri Mar 28 12:32:25 2008 +0000
     1.3 @@ -0,0 +1,203 @@
     1.4 +/**
     1.5 + * $Id$
     1.6 + *
     1.7 + * The PC side of the video support (responsible for actually displaying / 
     1.8 + * rendering frames)
     1.9 + *
    1.10 + * Copyright (c) 2005 Nathan Keynes.
    1.11 + *
    1.12 + * This program is free software; you can redistribute it and/or modify
    1.13 + * it under the terms of the GNU General Public License as published by
    1.14 + * the Free Software Foundation; either version 2 of the License, or
    1.15 + * (at your option) any later version.
    1.16 + *
    1.17 + * This program is distributed in the hope that it will be useful,
    1.18 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.19 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1.20 + * GNU General Public License for more details.
    1.21 + */
    1.22 +#include <assert.h>
    1.23 +#include <stdlib.h>
    1.24 +#include <gdk/gdk.h>
    1.25 +#include <gdk-pixbuf/gdk-pixbuf.h>
    1.26 +#include <gtk/gtkwidget.h>
    1.27 +#include <GL/osmesa.h>
    1.28 +#include "lxdream.h"
    1.29 +#include "display.h"
    1.30 +
    1.31 +#define MAX_PIXBUF 16
    1.32 +
    1.33 +extern GtkWidget *gtk_video_win;
    1.34 +extern int video_width, video_height;
    1.35 +
    1.36 +static render_buffer_t gdk_pixbuf_create_render_buffer( uint32_t width, uint32_t height );
    1.37 +static void gdk_pixbuf_destroy_render_buffer( render_buffer_t buffer );
    1.38 +static gboolean gdk_pixbuf_set_render_target( render_buffer_t buffer );
    1.39 +static gboolean gdk_pixbuf_display_render_buffer( render_buffer_t buffer );
    1.40 +static void gdk_pixbuf_load_frame_buffer( frame_buffer_t frame, render_buffer_t buffer );
    1.41 +static gboolean gdk_pixbuf_display_blank( uint32_t colour );
    1.42 +static gboolean gdk_pixbuf_read_render_buffer( unsigned char *target, render_buffer_t buffer, int rowstride, int format );
    1.43 +
    1.44 +static void *pixbuf_array[MAX_PIXBUF];
    1.45 +unsigned int pixbuf_max = 0;
    1.46 +OSMesaContext osmesa_context = NULL;
    1.47 +
    1.48 +void video_gdk_init_driver( display_driver_t driver )
    1.49 +{
    1.50 +    pixbuf_max = 0;
    1.51 +    driver->create_render_buffer = gdk_pixbuf_create_render_buffer;
    1.52 +    driver->destroy_render_buffer = gdk_pixbuf_destroy_render_buffer;
    1.53 +    driver->set_render_target = gdk_pixbuf_set_render_target;
    1.54 +    driver->display_render_buffer = gdk_pixbuf_display_render_buffer;
    1.55 +    driver->load_frame_buffer = gdk_pixbuf_load_frame_buffer;
    1.56 +    driver->display_blank = gdk_pixbuf_display_blank;
    1.57 +    driver->read_render_buffer = gdk_pixbuf_read_render_buffer;
    1.58 +
    1.59 +    osmesa_context = OSMesaCreateContextExt( OSMESA_RGBA, 32, 0, 0, 0 );
    1.60 +    OSMesaMakeCurrent( osmesa_context, NULL, GL_UNSIGNED_BYTE, 640, 480 );
    1.61 +    pvr2_setup_gl_context();
    1.62 +}
    1.63 +
    1.64 +int video_gdk_find_free()
    1.65 +{
    1.66 +    unsigned int i;
    1.67 +    for( i=0; i<pixbuf_max; i++ ) {
    1.68 +	if( pixbuf_array[i] == NULL ) {
    1.69 +	    return i;
    1.70 +	}
    1.71 +    }
    1.72 +    if( i < MAX_PIXBUF ) {
    1.73 +	return pixbuf_max++;
    1.74 +    }
    1.75 +    return -1;
    1.76 +}
    1.77 +
    1.78 +void video_gdk_shutdown()
    1.79 +{
    1.80 +    unsigned int i;
    1.81 +    for( i=0; i<pixbuf_max; i++ ) {
    1.82 +	if( pixbuf_array[i] != NULL ) {
    1.83 +	    g_free(pixbuf_array[i]);
    1.84 +	    pixbuf_array[i] = NULL;
    1.85 +	}
    1.86 +    }
    1.87 +    pixbuf_max = 0;
    1.88 +    OSMesaDestroyContext( osmesa_context );
    1.89 +}
    1.90 +
    1.91 +
    1.92 +static render_buffer_t gdk_pixbuf_create_render_buffer( uint32_t width, uint32_t height )
    1.93 +{
    1.94 +    render_buffer_t buf = g_malloc0(sizeof(struct render_buffer));
    1.95 +    gboolean alpha = FALSE;
    1.96 +    buf->width = width;
    1.97 +    buf->height = height;
    1.98 +    buf->buf_id = video_gdk_find_free();
    1.99 +    pixbuf_array[buf->buf_id] = g_malloc0( width * height * 4 );
   1.100 +    return buf;
   1.101 +}
   1.102 +
   1.103 +static void gdk_pixbuf_destroy_render_buffer( render_buffer_t buffer )
   1.104 +{
   1.105 +    g_free(pixbuf_array[buffer->buf_id] );
   1.106 +    pixbuf_array[buffer->buf_id] = NULL;
   1.107 +    if( buffer->buf_id == (pixbuf_max-1) ) {
   1.108 +	pixbuf_max--;
   1.109 +    }
   1.110 +}
   1.111 +
   1.112 +static gboolean gdk_pixbuf_display_render_buffer( render_buffer_t buffer )
   1.113 +{
   1.114 +    glFinish();
   1.115 +
   1.116 +    void *pb = pixbuf_array[buffer->buf_id];
   1.117 +    GdkGC *gc = gtk_video_win->style->fg_gc[GTK_STATE_NORMAL];
   1.118 +    GdkColor black = {0,0,0,0};
   1.119 +
   1.120 +    assert(gc);
   1.121 +
   1.122 +    int x1=0,y1=0,x2=video_width,y2=video_height;
   1.123 +
   1.124 +    int ah = video_width * 0.75;
   1.125 +
   1.126 +
   1.127 +    if( ah > video_height ) {
   1.128 +	int w = (video_height/0.75);
   1.129 +	x1 = (video_width - w)/2;
   1.130 +	x2 -= x1;
   1.131 +	gdk_gc_set_foreground( gc, &black );
   1.132 +	gdk_gc_set_background( gc, &black );
   1.133 +	gdk_draw_rectangle( gtk_video_win->window, gc, TRUE, 0, 0, x1, video_height );
   1.134 +	gdk_draw_rectangle( gtk_video_win->window, gc, TRUE, x2, 0, video_width, video_height );
   1.135 +    } else if( ah < video_height ) {
   1.136 +	y1 = (video_height - ah)/2;
   1.137 +	y2 -= y1;
   1.138 +	gdk_gc_set_foreground( gc, &black );
   1.139 +	gdk_gc_set_background( gc, &black );
   1.140 +	gdk_draw_rectangle( gtk_video_win->window, gc, TRUE, 0, 0, video_width, y1 );
   1.141 +	gdk_draw_rectangle( gtk_video_win->window, gc, TRUE, 0, y2, video_width, video_height );
   1.142 +    }
   1.143 +    int w = x2-x1;
   1.144 +    int h = y2-y1;
   1.145 +    
   1.146 +    if( w != buffer->width || h != buffer->height ) {
   1.147 +	gdk_draw_rgb_32_image( gtk_video_win->window, gc, x1, y1, buffer->width, buffer->height, GDK_RGB_DITHER_NONE,
   1.148 +			       pb, buffer->width*4 );
   1.149 +    } else {
   1.150 +	gdk_draw_rgb_32_image( gtk_video_win->window, gc, x1, y1, buffer->width, buffer->height, GDK_RGB_DITHER_NONE,
   1.151 +			       pb, buffer->width*4 );
   1.152 +    }
   1.153 +}
   1.154 +
   1.155 +static gboolean gdk_pixbuf_display_blank( uint32_t colour )
   1.156 +{
   1.157 +    GdkGC *gc = gtk_video_win->style->fg_gc[GTK_STATE_NORMAL];
   1.158 +    GdkColor col = { };
   1.159 +
   1.160 +    gdk_gc_set_foreground( gc, &col );
   1.161 +    gdk_gc_set_background( gc, &col );
   1.162 +    gdk_draw_rectangle( gtk_video_win->window, gc, TRUE, 0, 0, video_width, video_height );
   1.163 +    return TRUE;
   1.164 +}
   1.165 +
   1.166 +static gboolean gdk_pixbuf_set_render_target( render_buffer_t buffer )
   1.167 +{
   1.168 +    glFinish();
   1.169 +    void *pb = pixbuf_array[buffer->buf_id];
   1.170 +    OSMesaMakeCurrent( osmesa_context, pb, GL_UNSIGNED_BYTE,
   1.171 +		       buffer->width, buffer->height );
   1.172 +    //OSMesaPixelStore( OSMESA_Y_UP, 0 );
   1.173 +    glViewport( 0, 0, buffer->width, buffer->height );
   1.174 +    glDrawBuffer(GL_FRONT);
   1.175 +    return TRUE;
   1.176 +}
   1.177 +
   1.178 +static void gdk_pixbuf_load_frame_buffer( frame_buffer_t frame, render_buffer_t buffer )
   1.179 +{
   1.180 +    glFinish();
   1.181 +    void *pb = pixbuf_array[buffer->buf_id];
   1.182 +    OSMesaMakeCurrent( osmesa_context, pb, GL_UNSIGNED_BYTE,
   1.183 +		       buffer->width, buffer->height );
   1.184 +    GLenum type = colour_formats[frame->colour_format].type;
   1.185 +    GLenum format = colour_formats[frame->colour_format].format;
   1.186 +    int bpp = colour_formats[frame->colour_format].bpp;
   1.187 +    int rowstride = (frame->rowstride / bpp) - frame->width;
   1.188 +    
   1.189 +    gl_reset_state();
   1.190 +    glPixelStorei( GL_UNPACK_ROW_LENGTH, rowstride );
   1.191 +    glRasterPos2f(0.375, frame->height-0.375);
   1.192 +    glPixelZoom( 1.0, 1.0 );
   1.193 +    glDrawPixels( frame->width, frame->height, format, type, frame->data );
   1.194 +    glFlush();
   1.195 +}
   1.196 +
   1.197 +static gboolean gdk_pixbuf_read_render_buffer( unsigned char *target, render_buffer_t buffer, int rowstride, int format )
   1.198 +{
   1.199 +    glFinish();
   1.200 +    void *pb = pixbuf_array[buffer->buf_id];
   1.201 +    OSMesaMakeCurrent( osmesa_context, pb, GL_UNSIGNED_BYTE,
   1.202 +		       buffer->width, buffer->height );
   1.203 +    glReadBuffer( GL_FRONT );
   1.204 +    return gl_read_render_buffer( target, buffer, rowstride, format );
   1.205 +
   1.206 +}