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tree revision 635:76c63aac3590 lxdream-render
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filename src/drivers/video_gdk.c
changeset 635:76c63aac3590
next636:2ccf94f966fc
author nkeynes
date Thu Feb 14 13:54:11 2008 +0000 (12 years ago)
branchlxdream-render
permissions -rw-r--r--
last change Commit render work in progress. Main changes:
* Preliminary OSMesa support
* Move the generic gl code out to pvr2/
* Implement scene data structure + reader
* Remove the 1/z adjustments
file annotate diff log raw 
     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000

     1.2 +++ b/src/drivers/video_gdk.c	Thu Feb 14 13:54:11 2008 +0000

     1.3 @@ -0,0 +1,203 @@

     1.4 +/**

     1.5 + * $Id: video_gtk.c 636 2008-01-30 11:31:21Z nkeynes $

     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 +    texcache_gl_init();

    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 +}
.