lxdream 0.9.1| filename | src/drivers/video_glx.c |
| changeset | 669:ab344e42bca9 |
| prev | 665:99ae9dc4cab7 |
| next | 676:705a5707da13 |
| author | nkeynes |
| date | Mon May 26 11:01:42 2008 +0000 (15 years ago) |
| permissions | -rw-r--r-- |
| last change | hange 64-bit configuration to use sizeof(void *) rather than the system id returned by config.guess - config.guess gets it wrong in some situations. |
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1 /**
2 * $Id$
3 *
4 * Shared functions for all X11-based display drivers.
5 *
6 * Copyright (c) 2005 Nathan Keynes.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 */
19 #include <string.h>
20 #include "display.h"
21 #include <X11/Xlib.h>
22 #include <GL/glx.h>
23 #include "pvr2/pvr2.h"
24 #include "pvr2/glutil.h"
25 #include "drivers/video_glx.h"
26 #include "drivers/video_gl.h"
28 /**
29 * General X11 parameters. The front-end driver is expected to set this up
30 * by calling video_glx_init after initializing itself.
31 */
32 Display *video_x11_display = NULL;
33 Window video_x11_window = 0;
35 static int glx_version = 100;
36 static XVisualInfo *glx_visual = NULL;
37 static GLXFBConfig glx_fbconfig;
38 static GLXContext glx_context = NULL;
39 static gboolean glx_is_initialized = FALSE;
40 static gboolean glx_fbconfig_supported = FALSE;
41 static gboolean glx_pbuffer_supported = FALSE;
42 static GLuint glx_pbuffer_texture = 0;
44 /* Prototypes for pbuffer support methods */
45 static void glx_pbuffer_init( display_driver_t driver );
46 static render_buffer_t glx_pbuffer_create_render_buffer( uint32_t width, uint32_t height );
47 static void glx_pbuffer_destroy_render_buffer( render_buffer_t buffer );
48 static gboolean glx_pbuffer_set_render_target( render_buffer_t buffer );
49 static void glx_pbuffer_display_render_buffer( render_buffer_t buffer );
50 static void glx_pbuffer_load_frame_buffer( frame_buffer_t frame, render_buffer_t buffer );
51 static void glx_pbuffer_display_blank( uint32_t colour );
52 static gboolean glx_pbuffer_read_render_buffer( unsigned char *target, render_buffer_t buffer, int rowstride, int format );
54 /**
55 * Test if a specific extension is supported. From opengl.org
56 * @param extension extension name to check for
57 * @return TRUE if supported, otherwise FALSE.
58 */
59 gboolean isServerGLXExtensionSupported( Display *display, int screen,
60 const char *extension )
61 {
62 const char *extensions = NULL;
63 const char *start;
64 char *where, *terminator;
66 /* Extension names should not have spaces. */
67 where = strchr(extension, ' ');
68 if (where || *extension == '\0')
69 return 0;
70 extensions = glXQueryServerString(display, screen, GLX_EXTENSIONS);
71 start = extensions;
72 for (;;) {
73 where = strstr((const char *) start, extension);
74 if (!where)
75 break;
76 terminator = where + strlen(extension);
77 if (where == start || *(where - 1) == ' ')
78 if (*terminator == ' ' || *terminator == '\0')
79 return TRUE;
80 start = terminator;
81 }
82 return FALSE;
83 }
85 gboolean video_glx_init( Display *display, int screen )
86 {
87 int major, minor;
89 if( glx_is_initialized ) {
90 return TRUE;
91 }
93 Bool result = glXQueryVersion( display, &major, &minor );
94 if( result != False ) {
95 glx_version = (major*100) + minor;
96 }
98 glx_fbconfig_supported = (glx_version >= 103 ||
99 isServerGLXExtensionSupported(display, screen,
100 "GLX_SGIX_fbconfig") );
101 glx_pbuffer_supported = (glx_version >= 103 ||
102 isServerGLXExtensionSupported(display, screen,
103 "GLX_SGIX_pbuffer") );
105 if( glx_fbconfig_supported ) {
106 int nelem;
107 int fb_attribs[] = { GLX_DRAWABLE_TYPE,
108 GLX_PBUFFER_BIT|GLX_WINDOW_BIT,
109 GLX_RENDER_TYPE, GLX_RGBA_BIT,
110 GLX_DEPTH_SIZE, 24, 0 };
111 GLXFBConfig *configs = glXChooseFBConfig( display, screen,
112 fb_attribs, &nelem );
114 if( configs == NULL || nelem == 0 ) {
115 /* Didn't work. Fallback to 1.2 methods */
116 glx_fbconfig_supported = FALSE;
117 glx_pbuffer_supported = FALSE;
118 } else {
119 glx_fbconfig = configs[0];
120 glx_visual = glXGetVisualFromFBConfig(display, glx_fbconfig);
121 XFree(configs);
122 }
123 }
125 if( !glx_fbconfig_supported ) {
126 int attribs[] = { GLX_RGBA, GLX_DEPTH_SIZE, 24, 0 };
127 glx_visual = glXChooseVisual( display, screen, attribs );
128 }
130 if( glx_visual == NULL ) {
131 return FALSE;
132 }
134 glx_is_initialized = TRUE;
135 return TRUE;
136 }
138 gboolean video_glx_init_context( Display *display, Window window )
139 {
140 if( glx_fbconfig_supported ) {
141 glx_context = glXCreateNewContext( display, glx_fbconfig,
142 GLX_RGBA_TYPE, NULL, True );
143 if( glx_context == NULL ) {
144 ERROR( "Unable to create a GLX Context.");
145 return FALSE;
146 }
148 if( glXMakeContextCurrent( display, window, window,
149 glx_context ) == False ) {
150 ERROR( "Unable to prepare GLX context for drawing" );
151 glXDestroyContext( display, glx_context );
152 return FALSE;
153 }
154 } else {
155 glx_context = glXCreateContext( display, glx_visual, None, True );
156 if( glx_context == NULL ) {
157 ERROR( "Unable to create a GLX Context.");
158 return FALSE;
159 }
161 if( glXMakeCurrent( display, window, glx_context ) == False ) {
162 ERROR( "Unable to prepare GLX context for drawing" );
163 glXDestroyContext( display, glx_context );
164 return FALSE;
165 }
166 }
168 if( !glXIsDirect(display, glx_context) ) {
169 WARN( "Not using direct rendering - this is likely to be slow" );
170 }
172 video_x11_display = display;
173 video_x11_window = window;
175 return TRUE;
176 }
178 gboolean video_glx_init_driver( display_driver_t driver )
179 {
180 if( gl_fbo_is_supported() ) { // First preference
181 gl_fbo_init(driver);
182 } else if( glx_pbuffer_supported ) {
183 glx_pbuffer_init(driver);
184 } else {
185 ERROR( "Unable to create render buffers (requires either EXT_framebuffer_object or GLX 1.3+)" );
186 video_glx_shutdown();
187 return FALSE;
188 }
189 return TRUE;
190 }
193 void video_glx_shutdown()
194 {
195 // texcache_gl_shutdown();
196 glx_is_initialized = FALSE;
197 if( glx_context != NULL ) {
198 glXDestroyContext( video_x11_display, glx_context );
199 glx_context = NULL;
200 }
201 if( glx_visual != NULL ) {
202 XFree(glx_visual);
203 glx_visual = NULL;
204 }
205 }
208 XVisualInfo *video_glx_get_visual()
209 {
210 return glx_visual;
211 }
214 int video_glx_load_font( const gchar *font_name )
215 {
216 int lists;
217 XFontStruct *font = XLoadQueryFont(video_x11_display, font_name );
218 if (font == NULL)
219 return -1;
221 lists = glGenLists(96);
222 glXUseXFont(font->fid, 32, 96, lists);
223 XFreeFont(video_x11_display, font);
224 return lists;
225 }
228 void video_glx_swap_buffers( void )
229 {
230 glXSwapBuffers( video_x11_display, video_x11_window );
231 }
233 void video_glx_make_window_current( void )
234 {
235 glXMakeCurrent( video_x11_display, video_x11_window, glx_context );
236 }
239 // Pbuffer support
241 /**
242 * Construct the initial frame buffers and allocate ids for everything.
243 * The render handling driver methods are set to the fbo versions.
244 */
245 static void glx_pbuffer_init( display_driver_t driver )
246 {
247 glGenTextures( 1, &glx_pbuffer_texture );
248 driver->create_render_buffer = glx_pbuffer_create_render_buffer;
249 driver->destroy_render_buffer = glx_pbuffer_destroy_render_buffer;
250 driver->set_render_target = glx_pbuffer_set_render_target;
251 driver->display_render_buffer = glx_pbuffer_display_render_buffer;
252 driver->load_frame_buffer = glx_pbuffer_load_frame_buffer;
253 driver->display_blank = glx_pbuffer_display_blank;
254 driver->read_render_buffer = glx_pbuffer_read_render_buffer;
255 }
257 void glx_pbuffer_shutdown()
258 {
259 glDeleteTextures( 1, &glx_pbuffer_texture );
260 }
262 static render_buffer_t glx_pbuffer_create_render_buffer( uint32_t width, uint32_t height )
263 {
264 int attribs[] = { GLX_PBUFFER_WIDTH, width, GLX_PBUFFER_HEIGHT, height,
265 GLX_PRESERVED_CONTENTS, True, 0 };
266 GLXPbuffer pb = glXCreatePbuffer( video_x11_display, glx_fbconfig, attribs );
267 if( pb == (GLXPbuffer)NULL ) {
268 ERROR( "Unable to create pbuffer" );
269 return NULL;
270 }
271 render_buffer_t buffer = calloc( sizeof(struct render_buffer), 1 );
272 buffer->width = width;
273 buffer->height = height;
274 buffer->buf_id = pb;
275 return buffer;
276 }
278 static void glx_pbuffer_destroy_render_buffer( render_buffer_t buffer )
279 {
280 glXDestroyPbuffer( video_x11_display, (GLXPbuffer)buffer->buf_id );
281 buffer->buf_id = 0;
282 free( buffer );
283 }
285 static gboolean glx_pbuffer_set_render_target( render_buffer_t buffer )
286 {
287 glFinish();
288 if( glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context ) == False ) {
289 ERROR( "Make context current (pbuffer) failed!" );
290 }
291 /* setup the gl context */
292 glViewport( 0, 0, buffer->width, buffer->height );
293 glDrawBuffer(GL_FRONT);
295 return TRUE;
296 }
298 /**
299 * Render the texture holding the given buffer to the front window
300 * buffer.
301 */
302 static void glx_pbuffer_display_render_buffer( render_buffer_t buffer )
303 {
304 glFinish();
305 glReadBuffer( GL_FRONT );
306 glDrawBuffer( GL_FRONT );
307 glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context );
308 glBindTexture( GL_TEXTURE_RECTANGLE_ARB, glx_pbuffer_texture );
309 glCopyTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, 0, 0, buffer->width, buffer->height, 0 );
310 video_glx_make_window_current();
311 gl_texture_window( buffer->width, buffer->height, glx_pbuffer_texture, buffer->inverted );
312 }
314 static void glx_pbuffer_load_frame_buffer( frame_buffer_t frame, render_buffer_t buffer )
315 {
316 glFinish();
317 glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context );
318 GLenum type = colour_formats[frame->colour_format].type;
319 GLenum format = colour_formats[frame->colour_format].format;
320 int bpp = colour_formats[frame->colour_format].bpp;
321 int rowstride = (frame->rowstride / bpp) - frame->width;
323 gl_reset_state();
324 glPixelStorei( GL_UNPACK_ROW_LENGTH, rowstride );
325 glRasterPos2f(0.375, frame->height-0.375);
326 glPixelZoom( 1.0, 1.0 );
327 glDrawPixels( frame->width, frame->height, format, type, frame->data );
328 glFlush();
329 }
331 static void glx_pbuffer_display_blank( uint32_t colour )
332 {
333 glFinish();
334 video_glx_make_window_current();
335 gl_display_blank( colour );
336 }
338 static gboolean glx_pbuffer_read_render_buffer( unsigned char *target, render_buffer_t buffer,
339 int rowstride, int format )
340 {
341 glXMakeCurrent( video_x11_display, (GLXDrawable)buffer->buf_id, glx_context );
342 glReadBuffer( GL_FRONT );
343 return gl_read_render_buffer( target, buffer, rowstride, format );
344 }
.