lxdream 0.9.1| filename | src/drivers/video_gdk.c |
| changeset | 653:3202ff01d48e |
| next | 661:99d9494955a9 |
| author | nkeynes |
| date | Wed Apr 02 01:46:58 2008 +0000 (16 years ago) |
| permissions | -rw-r--r-- |
| last change | Add configure-time checks for fbo and shader functions in libGL (so linking doesn't fail on really old libGL implementations) |
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1 /**
2 * $Id$
3 *
4 * The PC side of the video support (responsible for actually displaying /
5 * rendering frames)
6 *
7 * Copyright (c) 2005 Nathan Keynes.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 */
19 #include <assert.h>
20 #include <stdlib.h>
21 #include <gdk/gdk.h>
22 #include <gdk-pixbuf/gdk-pixbuf.h>
23 #include <gtk/gtkwidget.h>
24 #include <GL/osmesa.h>
25 #include "lxdream.h"
26 #include "display.h"
28 #define MAX_PIXBUF 16
30 extern GtkWidget *gtk_video_win;
31 extern int video_width, video_height;
33 static render_buffer_t gdk_pixbuf_create_render_buffer( uint32_t width, uint32_t height );
34 static void gdk_pixbuf_destroy_render_buffer( render_buffer_t buffer );
35 static gboolean gdk_pixbuf_set_render_target( render_buffer_t buffer );
36 static gboolean gdk_pixbuf_display_render_buffer( render_buffer_t buffer );
37 static void gdk_pixbuf_load_frame_buffer( frame_buffer_t frame, render_buffer_t buffer );
38 static gboolean gdk_pixbuf_display_blank( uint32_t colour );
39 static gboolean gdk_pixbuf_read_render_buffer( unsigned char *target, render_buffer_t buffer, int rowstride, int format );
41 static void *pixbuf_array[MAX_PIXBUF];
42 unsigned int pixbuf_max = 0;
43 OSMesaContext osmesa_context = NULL;
45 void video_gdk_init_driver( display_driver_t driver )
46 {
47 pixbuf_max = 0;
48 driver->create_render_buffer = gdk_pixbuf_create_render_buffer;
49 driver->destroy_render_buffer = gdk_pixbuf_destroy_render_buffer;
50 driver->set_render_target = gdk_pixbuf_set_render_target;
51 driver->display_render_buffer = gdk_pixbuf_display_render_buffer;
52 driver->load_frame_buffer = gdk_pixbuf_load_frame_buffer;
53 driver->display_blank = gdk_pixbuf_display_blank;
54 driver->read_render_buffer = gdk_pixbuf_read_render_buffer;
56 osmesa_context = OSMesaCreateContextExt( OSMESA_RGBA, 32, 0, 0, 0 );
57 OSMesaMakeCurrent( osmesa_context, NULL, GL_UNSIGNED_BYTE, 640, 480 );
58 pvr2_setup_gl_context();
59 }
61 int video_gdk_find_free()
62 {
63 unsigned int i;
64 for( i=0; i<pixbuf_max; i++ ) {
65 if( pixbuf_array[i] == NULL ) {
66 return i;
67 }
68 }
69 if( i < MAX_PIXBUF ) {
70 return pixbuf_max++;
71 }
72 return -1;
73 }
75 void video_gdk_shutdown()
76 {
77 unsigned int i;
78 for( i=0; i<pixbuf_max; i++ ) {
79 if( pixbuf_array[i] != NULL ) {
80 g_free(pixbuf_array[i]);
81 pixbuf_array[i] = NULL;
82 }
83 }
84 pixbuf_max = 0;
85 OSMesaDestroyContext( osmesa_context );
86 }
89 static render_buffer_t gdk_pixbuf_create_render_buffer( uint32_t width, uint32_t height )
90 {
91 render_buffer_t buf = g_malloc0(sizeof(struct render_buffer));
92 gboolean alpha = FALSE;
93 buf->width = width;
94 buf->height = height;
95 buf->buf_id = video_gdk_find_free();
96 pixbuf_array[buf->buf_id] = g_malloc0( width * height * 4 );
97 return buf;
98 }
100 static void gdk_pixbuf_destroy_render_buffer( render_buffer_t buffer )
101 {
102 g_free(pixbuf_array[buffer->buf_id] );
103 pixbuf_array[buffer->buf_id] = NULL;
104 if( buffer->buf_id == (pixbuf_max-1) ) {
105 pixbuf_max--;
106 }
107 }
109 static gboolean gdk_pixbuf_display_render_buffer( render_buffer_t buffer )
110 {
111 glFinish();
113 void *pb = pixbuf_array[buffer->buf_id];
114 GdkGC *gc = gtk_video_win->style->fg_gc[GTK_STATE_NORMAL];
115 GdkColor black = {0,0,0,0};
117 assert(gc);
119 int x1=0,y1=0,x2=video_width,y2=video_height;
121 int ah = video_width * 0.75;
124 if( ah > video_height ) {
125 int w = (video_height/0.75);
126 x1 = (video_width - w)/2;
127 x2 -= x1;
128 gdk_gc_set_foreground( gc, &black );
129 gdk_gc_set_background( gc, &black );
130 gdk_draw_rectangle( gtk_video_win->window, gc, TRUE, 0, 0, x1, video_height );
131 gdk_draw_rectangle( gtk_video_win->window, gc, TRUE, x2, 0, video_width, video_height );
132 } else if( ah < video_height ) {
133 y1 = (video_height - ah)/2;
134 y2 -= y1;
135 gdk_gc_set_foreground( gc, &black );
136 gdk_gc_set_background( gc, &black );
137 gdk_draw_rectangle( gtk_video_win->window, gc, TRUE, 0, 0, video_width, y1 );
138 gdk_draw_rectangle( gtk_video_win->window, gc, TRUE, 0, y2, video_width, video_height );
139 }
140 int w = x2-x1;
141 int h = y2-y1;
143 if( w != buffer->width || h != buffer->height ) {
144 gdk_draw_rgb_32_image( gtk_video_win->window, gc, x1, y1, buffer->width, buffer->height, GDK_RGB_DITHER_NONE,
145 pb, buffer->width*4 );
146 } else {
147 gdk_draw_rgb_32_image( gtk_video_win->window, gc, x1, y1, buffer->width, buffer->height, GDK_RGB_DITHER_NONE,
148 pb, buffer->width*4 );
149 }
150 }
152 static gboolean gdk_pixbuf_display_blank( uint32_t colour )
153 {
154 GdkGC *gc = gtk_video_win->style->fg_gc[GTK_STATE_NORMAL];
155 GdkColor col = { };
157 gdk_gc_set_foreground( gc, &col );
158 gdk_gc_set_background( gc, &col );
159 gdk_draw_rectangle( gtk_video_win->window, gc, TRUE, 0, 0, video_width, video_height );
160 return TRUE;
161 }
163 static gboolean gdk_pixbuf_set_render_target( render_buffer_t buffer )
164 {
165 glFinish();
166 void *pb = pixbuf_array[buffer->buf_id];
167 OSMesaMakeCurrent( osmesa_context, pb, GL_UNSIGNED_BYTE,
168 buffer->width, buffer->height );
169 //OSMesaPixelStore( OSMESA_Y_UP, 0 );
170 glViewport( 0, 0, buffer->width, buffer->height );
171 glDrawBuffer(GL_FRONT);
172 return TRUE;
173 }
175 static void gdk_pixbuf_load_frame_buffer( frame_buffer_t frame, render_buffer_t buffer )
176 {
177 glFinish();
178 void *pb = pixbuf_array[buffer->buf_id];
179 OSMesaMakeCurrent( osmesa_context, pb, GL_UNSIGNED_BYTE,
180 buffer->width, buffer->height );
181 GLenum type = colour_formats[frame->colour_format].type;
182 GLenum format = colour_formats[frame->colour_format].format;
183 int bpp = colour_formats[frame->colour_format].bpp;
184 int rowstride = (frame->rowstride / bpp) - frame->width;
186 gl_reset_state();
187 glPixelStorei( GL_UNPACK_ROW_LENGTH, rowstride );
188 glRasterPos2f(0.375, frame->height-0.375);
189 glPixelZoom( 1.0, 1.0 );
190 glDrawPixels( frame->width, frame->height, format, type, frame->data );
191 glFlush();
192 }
194 static gboolean gdk_pixbuf_read_render_buffer( unsigned char *target, render_buffer_t buffer, int rowstride, int format )
195 {
196 glFinish();
197 void *pb = pixbuf_array[buffer->buf_id];
198 OSMesaMakeCurrent( osmesa_context, pb, GL_UNSIGNED_BYTE,
199 buffer->width, buffer->height );
200 glReadBuffer( GL_FRONT );
201 return gl_read_render_buffer( target, buffer, rowstride, format );
203 }
.