lxdream 0.9.1| filename | src/drivers/video_glx.c |
| changeset | 681:1755a126b109 |
| prev | 676:705a5707da13 |
| next | 703:585c66692be7 |
| author | nkeynes |
| date | Sun Jun 22 04:01:27 2008 +0000 (15 years ago) |
| permissions | -rw-r--r-- |
| last change | Commit work-in-progress CoreAudio driver (along with various changes to the audio subsystem) |
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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 <string.h>
24 #include "pvr2/pvr2.h"
25 #include "pvr2/glutil.h"
26 #include "drivers/video_glx.h"
27 #include "drivers/video_gl.h"
29 /**
30 * General X11 parameters. The front-end driver is expected to set this up
31 * by calling video_glx_init after initializing itself.
32 */
33 Display *video_x11_display = NULL;
34 Window video_x11_window = 0;
36 static int glx_version = 100;
37 static XVisualInfo *glx_visual = NULL;
38 static GLXFBConfig glx_fbconfig;
39 static GLXContext glx_context = NULL;
40 static gboolean glx_is_initialized = FALSE;
41 static gboolean glx_fbconfig_supported = FALSE;
42 static gboolean glx_pbuffer_supported = FALSE;
43 static GLuint glx_pbuffer_texture = 0;
45 /* Prototypes for pbuffer support methods */
46 static void glx_pbuffer_init( display_driver_t driver );
47 static render_buffer_t glx_pbuffer_create_render_buffer( uint32_t width, uint32_t height );
48 static void glx_pbuffer_destroy_render_buffer( render_buffer_t buffer );
49 static gboolean glx_pbuffer_set_render_target( render_buffer_t buffer );
50 static void glx_pbuffer_display_render_buffer( render_buffer_t buffer );
51 static void glx_pbuffer_load_frame_buffer( frame_buffer_t frame, render_buffer_t buffer );
52 static void glx_pbuffer_display_blank( uint32_t colour );
53 static gboolean glx_pbuffer_read_render_buffer( unsigned char *target, render_buffer_t buffer, int rowstride, int format );
55 /**
56 * Test if a specific extension is supported. From opengl.org
57 * @param extension extension name to check for
58 * @return TRUE if supported, otherwise FALSE.
59 */
60 gboolean isServerGLXExtensionSupported( Display *display, int screen,
61 const char *extension )
62 {
63 const char *extensions = NULL;
64 const char *start;
65 char *where, *terminator;
67 /* Extension names should not have spaces. */
68 where = strchr(extension, ' ');
69 if (where || *extension == '\0')
70 return 0;
71 extensions = glXQueryServerString(display, screen, GLX_EXTENSIONS);
72 start = extensions;
73 for (;;) {
74 where = strstr((const char *) start, extension);
75 if (!where)
76 break;
77 terminator = where + strlen(extension);
78 if (where == start || *(where - 1) == ' ')
79 if (*terminator == ' ' || *terminator == '\0')
80 return TRUE;
81 start = terminator;
82 }
83 return FALSE;
84 }
86 gboolean video_glx_init( Display *display, int screen )
87 {
88 int major, minor;
90 if( glx_is_initialized ) {
91 return TRUE;
92 }
94 Bool result = glXQueryVersion( display, &major, &minor );
95 if( result != False ) {
96 glx_version = (major*100) + minor;
97 }
99 glx_fbconfig_supported = (glx_version >= 103 ||
100 isServerGLXExtensionSupported(display, screen,
101 "GLX_SGIX_fbconfig") );
102 glx_pbuffer_supported = (glx_version >= 103 ||
103 isServerGLXExtensionSupported(display, screen,
104 "GLX_SGIX_pbuffer") );
105 glx_fbconfig_supported = FALSE;
106 if( glx_fbconfig_supported ) {
107 int nelem;
108 int fb_attribs[] = { GLX_DRAWABLE_TYPE,
109 GLX_PBUFFER_BIT|GLX_WINDOW_BIT,
110 GLX_RENDER_TYPE, GLX_RGBA_BIT,
111 GLX_DEPTH_SIZE, 24, 0 };
112 GLXFBConfig *configs = glXChooseFBConfig( display, screen,
113 fb_attribs, &nelem );
115 if( configs == NULL || nelem == 0 ) {
116 /* Try a 16-bit depth buffer and see if it helps */
117 fb_attribs[5] = 16;
118 configs = glXChooseFBConfig( display, screen, fb_attribs, &nelem );
119 if( nelem > 0 ) {
120 WARN( "Using a 16-bit depth buffer - expect video glitches" );
121 }
123 }
124 if( configs == NULL || nelem == 0 ) {
125 /* Still didn't work. Fallback to 1.2 methods */
126 glx_fbconfig_supported = FALSE;
127 glx_pbuffer_supported = FALSE;
128 } else {
129 glx_fbconfig = configs[0];
130 glx_visual = glXGetVisualFromFBConfig(display, glx_fbconfig);
131 XFree(configs);
132 }
133 }
135 if( !glx_fbconfig_supported ) {
136 int attribs[] = { GLX_RGBA, GLX_DEPTH_SIZE, 24, 0 };
137 glx_visual = glXChooseVisual( display, screen, attribs );
138 if( glx_visual == NULL ) {
139 /* Try the 16-bit fallback here too */
140 attribs[2] = 16;
141 glx_visual = glXChooseVisual( display, screen, attribs );
142 if( glx_visual != NULL ) {
143 WARN( "Using a 16-bit depth buffer - expect video glitches" );
144 }
145 }
146 }
148 if( glx_visual == NULL ) {
149 return FALSE;
150 }
152 glx_is_initialized = TRUE;
153 return TRUE;
154 }
156 gboolean video_glx_init_context( Display *display, Window window )
157 {
158 if( glx_fbconfig_supported ) {
159 glx_context = glXCreateNewContext( display, glx_fbconfig,
160 GLX_RGBA_TYPE, NULL, True );
161 if( glx_context == NULL ) {
162 ERROR( "Unable to create a GLX Context.");
163 return FALSE;
164 }
166 if( glXMakeContextCurrent( display, window, window,
167 glx_context ) == False ) {
168 ERROR( "Unable to prepare GLX context for drawing" );
169 glXDestroyContext( display, glx_context );
170 return FALSE;
171 }
172 } else {
173 glx_context = glXCreateContext( display, glx_visual, None, True );
174 if( glx_context == NULL ) {
175 ERROR( "Unable to create a GLX Context.");
176 return FALSE;
177 }
179 if( glXMakeCurrent( display, window, glx_context ) == False ) {
180 ERROR( "Unable to prepare GLX context for drawing" );
181 glXDestroyContext( display, glx_context );
182 return FALSE;
183 }
184 }
186 if( !glXIsDirect(display, glx_context) ) {
187 WARN( "Not using direct rendering - this is likely to be slow" );
188 }
190 video_x11_display = display;
191 video_x11_window = window;
193 return TRUE;
194 }
196 gboolean video_glx_init_driver( display_driver_t driver )
197 {
198 if( gl_fbo_is_supported() ) { // First preference
199 gl_fbo_init(driver);
200 } else if( glx_pbuffer_supported ) {
201 glx_pbuffer_init(driver);
202 } else {
203 ERROR( "Unable to create render buffers (requires either EXT_framebuffer_object or GLX 1.3+)" );
204 video_glx_shutdown();
205 return FALSE;
206 }
207 return TRUE;
208 }
211 void video_glx_shutdown()
212 {
213 // texcache_gl_shutdown();
214 glx_is_initialized = FALSE;
215 if( glx_context != NULL ) {
216 glXDestroyContext( video_x11_display, glx_context );
217 glx_context = NULL;
218 }
219 if( glx_visual != NULL ) {
220 XFree(glx_visual);
221 glx_visual = NULL;
222 }
223 }
226 XVisualInfo *video_glx_get_visual()
227 {
228 return glx_visual;
229 }
232 int video_glx_load_font( const gchar *font_name )
233 {
234 int lists;
235 XFontStruct *font = XLoadQueryFont(video_x11_display, font_name );
236 if (font == NULL)
237 return -1;
239 lists = glGenLists(96);
240 glXUseXFont(font->fid, 32, 96, lists);
241 XFreeFont(video_x11_display, font);
242 return lists;
243 }
246 void video_glx_swap_buffers( void )
247 {
248 glXSwapBuffers( video_x11_display, video_x11_window );
249 }
251 void video_glx_make_window_current( void )
252 {
253 glXMakeCurrent( video_x11_display, video_x11_window, glx_context );
254 }
257 // Pbuffer support
259 /**
260 * Construct the initial frame buffers and allocate ids for everything.
261 * The render handling driver methods are set to the fbo versions.
262 */
263 static void glx_pbuffer_init( display_driver_t driver )
264 {
265 glGenTextures( 1, &glx_pbuffer_texture );
266 driver->create_render_buffer = glx_pbuffer_create_render_buffer;
267 driver->destroy_render_buffer = glx_pbuffer_destroy_render_buffer;
268 driver->set_render_target = glx_pbuffer_set_render_target;
269 driver->display_render_buffer = glx_pbuffer_display_render_buffer;
270 driver->load_frame_buffer = glx_pbuffer_load_frame_buffer;
271 driver->display_blank = glx_pbuffer_display_blank;
272 driver->read_render_buffer = glx_pbuffer_read_render_buffer;
273 }
275 void glx_pbuffer_shutdown()
276 {
277 glDeleteTextures( 1, &glx_pbuffer_texture );
278 }
280 static render_buffer_t glx_pbuffer_create_render_buffer( uint32_t width, uint32_t height )
281 {
282 int attribs[] = { GLX_PBUFFER_WIDTH, width, GLX_PBUFFER_HEIGHT, height,
283 GLX_PRESERVED_CONTENTS, True, 0 };
284 GLXPbuffer pb = glXCreatePbuffer( video_x11_display, glx_fbconfig, attribs );
285 if( pb == (GLXPbuffer)NULL ) {
286 ERROR( "Unable to create pbuffer" );
287 return NULL;
288 }
289 render_buffer_t buffer = calloc( sizeof(struct render_buffer), 1 );
290 buffer->width = width;
291 buffer->height = height;
292 buffer->buf_id = pb;
293 return buffer;
294 }
296 static void glx_pbuffer_destroy_render_buffer( render_buffer_t buffer )
297 {
298 glXDestroyPbuffer( video_x11_display, (GLXPbuffer)buffer->buf_id );
299 buffer->buf_id = 0;
300 free( buffer );
301 }
303 static gboolean glx_pbuffer_set_render_target( render_buffer_t buffer )
304 {
305 glFinish();
306 if( glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context ) == False ) {
307 ERROR( "Make context current (pbuffer) failed!" );
308 }
309 /* setup the gl context */
310 glViewport( 0, 0, buffer->width, buffer->height );
311 glDrawBuffer(GL_FRONT);
313 return TRUE;
314 }
316 /**
317 * Render the texture holding the given buffer to the front window
318 * buffer.
319 */
320 static void glx_pbuffer_display_render_buffer( render_buffer_t buffer )
321 {
322 glFinish();
323 glReadBuffer( GL_FRONT );
324 glDrawBuffer( GL_FRONT );
325 glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context );
326 glBindTexture( GL_TEXTURE_RECTANGLE_ARB, glx_pbuffer_texture );
327 glCopyTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, 0, 0, buffer->width, buffer->height, 0 );
328 video_glx_make_window_current();
329 gl_texture_window( buffer->width, buffer->height, glx_pbuffer_texture, buffer->inverted );
330 }
332 static void glx_pbuffer_load_frame_buffer( frame_buffer_t frame, render_buffer_t buffer )
333 {
334 glFinish();
335 glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context );
336 GLenum type = colour_formats[frame->colour_format].type;
337 GLenum format = colour_formats[frame->colour_format].format;
338 int bpp = colour_formats[frame->colour_format].bpp;
339 int rowstride = (frame->rowstride / bpp) - frame->width;
341 gl_reset_state();
342 glPixelStorei( GL_UNPACK_ROW_LENGTH, rowstride );
343 glRasterPos2f(0.375, frame->height-0.375);
344 glPixelZoom( 1.0, 1.0 );
345 glDrawPixels( frame->width, frame->height, format, type, frame->data );
346 glFlush();
347 }
349 static void glx_pbuffer_display_blank( uint32_t colour )
350 {
351 glFinish();
352 video_glx_make_window_current();
353 gl_display_blank( colour );
354 }
356 static gboolean glx_pbuffer_read_render_buffer( unsigned char *target, render_buffer_t buffer,
357 int rowstride, int format )
358 {
359 glXMakeCurrent( video_x11_display, (GLXDrawable)buffer->buf_id, glx_context );
360 glReadBuffer( GL_FRONT );
361 return gl_read_render_buffer( target, buffer, rowstride, format );
362 }
.