filename | src/drivers/video_glx.c |
changeset | 1258:f8a9c0fd2abb |
prev | 1256:a9d29fe74bf3 |
author | nkeynes |
date | Sat Jan 26 14:00:48 2013 +1000 (11 years ago) |
permissions | -rw-r--r-- |
last change | Change glib includes to #include <glib.h> rather than the individual headers, as recent glib versions are breaking on this |
view | annotate | diff | log | raw |
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 <stdlib.h>
20 #include <string.h>
21 #include "display.h"
22 #include <X11/Xlib.h>
23 #include <GL/glx.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;
44 static int glx_depth_bits = 0;
46 static void video_glx_swap_buffers( void );
47 static void video_glx_print_info( FILE *out );
49 /* Prototypes for pbuffer support methods */
50 static void glx_pbuffer_init( display_driver_t driver );
51 static render_buffer_t glx_pbuffer_create_render_buffer( uint32_t width, uint32_t height, GLuint tex_id );
52 static void glx_pbuffer_destroy_render_buffer( render_buffer_t buffer );
53 static gboolean glx_pbuffer_set_render_target( render_buffer_t buffer );
54 static void glx_pbuffer_finish_render( render_buffer_t buffer );
55 static void glx_pbuffer_display_render_buffer( render_buffer_t buffer );
56 static void glx_pbuffer_load_frame_buffer( frame_buffer_t frame, render_buffer_t buffer );
57 static void glx_pbuffer_display_blank( uint32_t colour );
58 static gboolean glx_pbuffer_read_render_buffer( unsigned char *target, render_buffer_t buffer, int rowstride, int format );
60 /**
61 * Test if a specific extension is supported. From opengl.org
62 * @param extension extension name to check for
63 * @return TRUE if supported, otherwise FALSE.
64 */
65 gboolean isServerGLXExtensionSupported( Display *display, int screen,
66 const char *extension )
67 {
68 const char *extensions = NULL;
69 const char *start;
70 char *where, *terminator;
72 /* Extension names should not have spaces. */
73 where = strchr(extension, ' ');
74 if (where || *extension == '\0')
75 return 0;
76 extensions = glXQueryServerString(display, screen, GLX_EXTENSIONS);
77 start = extensions;
78 for (;;) {
79 where = strstr((const char *) start, extension);
80 if (!where)
81 break;
82 terminator = where + strlen(extension);
83 if (where == start || *(where - 1) == ' ')
84 if (*terminator == ' ' || *terminator == '\0')
85 return TRUE;
86 start = terminator;
87 }
88 return FALSE;
89 }
91 gboolean video_glx_init( Display *display, int screen )
92 {
93 int major, minor;
94 int glx_major, glx_minor, glx_error;
96 if( glx_is_initialized ) {
97 return TRUE;
98 }
100 Bool result = XQueryExtension( display, "GLX", &glx_major, &glx_minor, &glx_error ) &&
101 glXQueryVersion( display, &major, &minor );
102 if( result == False ) {
103 ERROR( "GLX not supported on display" );
104 return FALSE;
105 }
107 glx_version = (major*100) + minor;
109 #ifdef APPLE_BUILD
110 /* fbconfig is broken on at least the 10.5 GLX implementation */
111 glx_fbconfig_supported = FALSE;
112 #else
113 glx_fbconfig_supported = (glx_version >= 103 ||
114 isServerGLXExtensionSupported(display, screen,
115 "GLX_SGIX_fbconfig") );
116 #endif
117 glx_pbuffer_supported = (glx_version >= 103 ||
118 isServerGLXExtensionSupported(display, screen,
119 "GLX_SGIX_pbuffer") );
120 // glx_fbconfig_supported = FALSE;
121 if( glx_fbconfig_supported ) {
122 int nelem;
123 glx_depth_bits = 24;
124 int fb_attribs[] = { GLX_DRAWABLE_TYPE,
125 GLX_PBUFFER_BIT|GLX_WINDOW_BIT,
126 GLX_RENDER_TYPE, GLX_RGBA_BIT,
127 GLX_DEPTH_SIZE, 24,
128 GLX_STENCIL_SIZE, 8, 0 };
129 GLXFBConfig *configs = glXChooseFBConfig( display, screen,
130 fb_attribs, &nelem );
132 if( configs == NULL || nelem == 0 ) {
133 /* Try a 16-bit depth buffer and see if it helps */
134 fb_attribs[5] = 16;
135 glx_depth_bits = 16;
136 configs = glXChooseFBConfig( display, screen, fb_attribs, &nelem );
137 if( nelem > 0 ) {
138 WARN( "Using a 16-bit depth buffer - expect video glitches" );
139 }
141 }
142 if( configs == NULL || nelem == 0 ) {
143 /* Still didn't work. Fallback to 1.2 methods */
144 glx_fbconfig_supported = FALSE;
145 glx_pbuffer_supported = FALSE;
146 } else {
147 glx_fbconfig = configs[0];
148 glx_visual = glXGetVisualFromFBConfig(display, glx_fbconfig);
149 XFree(configs);
150 }
151 }
153 if( !glx_fbconfig_supported ) {
154 glx_depth_bits = 24;
155 int attribs[] = { GLX_RGBA, GLX_DEPTH_SIZE, 24, GLX_STENCIL_SIZE, 8, 0 };
156 glx_visual = glXChooseVisual( display, screen, attribs );
157 if( glx_visual == NULL ) {
158 /* Try the 16-bit fallback here too */
159 glx_depth_bits = 16;
160 attribs[2] = 16;
161 glx_visual = glXChooseVisual( display, screen, attribs );
162 if( glx_visual != NULL ) {
163 WARN( "Using a 16-bit depth buffer - expect video glitches" );
164 }
165 }
166 }
168 if( glx_visual == NULL ) {
169 return FALSE;
170 }
172 glx_is_initialized = TRUE;
173 return TRUE;
174 }
176 static void video_glx_print_info( FILE *out )
177 {
178 XWindowAttributes attr;
180 if( !XGetWindowAttributes(video_x11_display, video_x11_window, &attr) )
181 return; /* Failed */
182 int screen = XScreenNumberOfScreen(attr.screen);
184 fprintf( out, "GLX Server: %s %s\n", glXQueryServerString(video_x11_display, screen, GLX_VENDOR),
185 glXQueryServerString(video_x11_display, screen, GLX_VERSION) );
186 fprintf( out, "GLX Client: %s %s\n", glXGetClientString(video_x11_display, GLX_VENDOR),
187 glXGetClientString(video_x11_display, GLX_VERSION) );
188 fprintf( out, "GLX Server Extensions:\n" );
189 fprint_extensions( out, glXQueryServerString(video_x11_display, screen, GLX_EXTENSIONS) );
190 fprintf( out, "GLX Client Extensions:\n" );
191 fprint_extensions( out, glXGetClientString(video_x11_display, GLX_EXTENSIONS) );
192 fprintf( out, "GLX Extensions:\n" );
193 fprint_extensions( out, glXQueryExtensionsString(video_x11_display, screen) );
195 }
197 gboolean video_glx_init_context( Display *display, Window window )
198 {
199 if( glx_fbconfig_supported ) {
200 glx_context = glXCreateNewContext( display, glx_fbconfig,
201 GLX_RGBA_TYPE, NULL, True );
202 if( glx_context == NULL ) {
203 ERROR( "Unable to create a GLX Context.");
204 return FALSE;
205 }
207 if( glXMakeCurrent( display, window,
208 glx_context ) == False ) {
209 ERROR( "Unable to prepare GLX context for drawing" );
210 glXDestroyContext( display, glx_context );
211 return FALSE;
212 }
213 } else {
214 glx_context = glXCreateContext( display, glx_visual, None, True );
215 if( glx_context == NULL ) {
216 ERROR( "Unable to create a GLX Context.");
217 return FALSE;
218 }
220 if( glXMakeCurrent( display, window, glx_context ) == False ) {
221 ERROR( "Unable to prepare GLX context for drawing" );
222 glXDestroyContext( display, glx_context );
223 return FALSE;
224 }
225 }
227 if( !glXIsDirect(display, glx_context) ) {
228 WARN( "Not using direct rendering - this is likely to be slow" );
229 }
231 video_x11_display = display;
232 video_x11_window = window;
234 return TRUE;
235 }
237 gboolean video_glx_init_driver( display_driver_t driver )
238 {
239 driver->swap_buffers = video_glx_swap_buffers;
240 driver->print_info = video_glx_print_info;
241 driver->capabilities.has_gl = TRUE;
242 driver->capabilities.depth_bits = glx_depth_bits;
243 if( !gl_init_driver(driver, !glx_pbuffer_supported) ) {
244 video_glx_shutdown();
245 return FALSE;
246 }
247 if( driver->create_render_buffer == NULL ) {
248 /* If we get here, pbuffers are supported and FBO didn't work */
249 glx_pbuffer_init(driver);
250 }
251 return TRUE;
252 }
255 void video_glx_shutdown()
256 {
257 // texcache_gl_shutdown();
258 glx_is_initialized = FALSE;
259 if( glx_context != NULL ) {
260 glXDestroyContext( video_x11_display, glx_context );
261 glx_context = NULL;
262 }
263 if( glx_visual != NULL ) {
264 XFree(glx_visual);
265 glx_visual = NULL;
266 }
267 }
270 XVisualInfo *video_glx_get_visual()
271 {
272 return glx_visual;
273 }
276 int video_glx_load_font( const gchar *font_name )
277 {
278 int lists;
279 XFontStruct *font = XLoadQueryFont(video_x11_display, font_name );
280 if (font == NULL)
281 return -1;
283 lists = glGenLists(96);
284 glXUseXFont(font->fid, 32, 96, lists);
285 XFreeFont(video_x11_display, font);
286 return lists;
287 }
290 static void video_glx_swap_buffers( void )
291 {
292 glXSwapBuffers( video_x11_display, video_x11_window );
293 }
295 void video_glx_make_window_current( void )
296 {
297 glXMakeCurrent( video_x11_display, video_x11_window, glx_context );
298 }
301 // Pbuffer support
303 /**
304 * Construct the initial frame buffers and allocate ids for everything.
305 * The render handling driver methods are set to the fbo versions.
306 */
307 static void glx_pbuffer_init( display_driver_t driver )
308 {
309 GLint stencil_bits = 0;
311 /* Retrieve the number of stencil bits */
312 glGetIntegerv( GL_STENCIL_BITS, &stencil_bits );
313 driver->capabilities.stencil_bits = stencil_bits;
315 glGenTextures( 1, &glx_pbuffer_texture );
316 driver->create_render_buffer = glx_pbuffer_create_render_buffer;
317 driver->destroy_render_buffer = glx_pbuffer_destroy_render_buffer;
318 driver->set_render_target = glx_pbuffer_set_render_target;
319 driver->finish_render = glx_pbuffer_finish_render;
320 driver->display_render_buffer = glx_pbuffer_display_render_buffer;
321 driver->load_frame_buffer = glx_pbuffer_load_frame_buffer;
322 driver->display_blank = glx_pbuffer_display_blank;
323 driver->read_render_buffer = glx_pbuffer_read_render_buffer;
324 }
326 void glx_pbuffer_shutdown()
327 {
328 glDeleteTextures( 1, &glx_pbuffer_texture );
329 }
331 static render_buffer_t glx_pbuffer_create_render_buffer( uint32_t width, uint32_t height, GLuint tex_id )
332 {
333 int attribs[] = { GLX_PBUFFER_WIDTH, width, GLX_PBUFFER_HEIGHT, height,
334 GLX_PRESERVED_CONTENTS, True, 0 };
335 GLXPbuffer pb = glXCreatePbuffer( video_x11_display, glx_fbconfig, attribs );
336 if( pb == (GLXPbuffer)NULL ) {
337 ERROR( "Unable to create pbuffer" );
338 return NULL;
339 }
340 render_buffer_t buffer = calloc( sizeof(struct render_buffer), 1 );
341 buffer->width = width;
342 buffer->height = height;
343 buffer->buf_id = pb;
344 buffer->tex_id = tex_id;
345 return buffer;
346 }
348 static void glx_pbuffer_destroy_render_buffer( render_buffer_t buffer )
349 {
350 glXDestroyPbuffer( video_x11_display, (GLXPbuffer)buffer->buf_id );
351 buffer->buf_id = 0;
352 free( buffer );
353 }
355 static gboolean glx_pbuffer_set_render_target( render_buffer_t buffer )
356 {
357 glFinish();
358 if( glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context ) == False ) {
359 ERROR( "Make context current (pbuffer) failed!" );
360 }
361 /* setup the gl context */
362 glViewport( 0, 0, buffer->width, buffer->height );
363 glDrawBuffer(GL_FRONT);
365 return TRUE;
366 }
368 static void glx_pbuffer_finish_render( render_buffer_t buffer )
369 {
370 glFinish();
371 if( buffer->tex_id != 0 ) {
372 // The pbuffer should already be the current context, but just in case...
373 glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context );
374 glBindTexture( GL_TEXTURE_2D, buffer->tex_id );
375 glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 0, 0, buffer->width, buffer->height, 0 );
376 }
377 }
380 /**
381 * Render the texture holding the given buffer to the front window
382 * buffer.
383 */
384 static void glx_pbuffer_display_render_buffer( render_buffer_t buffer )
385 {
386 glFinish();
387 glReadBuffer( GL_FRONT );
388 glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context );
389 glBindTexture( GL_TEXTURE_2D, glx_pbuffer_texture );
390 glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 0, 0, buffer->width, buffer->height, 0 );
391 video_glx_make_window_current();
392 gl_texture_window( buffer->width, buffer->height, glx_pbuffer_texture, buffer->inverted );
393 }
395 static void glx_pbuffer_load_frame_buffer( frame_buffer_t frame, render_buffer_t buffer )
396 {
397 glFinish();
398 glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context );
399 GLenum type = colour_formats[frame->colour_format].type;
400 GLenum format = colour_formats[frame->colour_format].format;
401 int bpp = colour_formats[frame->colour_format].bpp;
402 int rowstride = (frame->rowstride / bpp) - frame->width;
404 gl_framebuffer_setup();
405 glPixelStorei( GL_UNPACK_ROW_LENGTH, rowstride );
406 glRasterPos2f(0.375, frame->height-0.375);
407 glPixelZoom( 1.0, 1.0 );
408 glDrawPixels( frame->width, frame->height, format, type, frame->data );
409 glPixelStorei( GL_UNPACK_ROW_LENGTH, 0 );
410 glFlush();
411 gl_framebuffer_cleanup();
412 }
414 static void glx_pbuffer_display_blank( uint32_t colour )
415 {
416 glFinish();
417 video_glx_make_window_current();
418 gl_display_blank( colour );
419 }
421 static gboolean glx_pbuffer_read_render_buffer( unsigned char *target, render_buffer_t buffer,
422 int rowstride, int format )
423 {
424 glXMakeCurrent( video_x11_display, (GLXDrawable)buffer->buf_id, glx_context );
425 glReadBuffer( GL_FRONT );
426 return gl_read_render_buffer( target, buffer, rowstride, format );
427 }
.