filename | src/drivers/video_glx.c |
changeset | 1159:580436b01b6c |
prev | 1134:f502f3d32f90 |
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author | Nathan Keynes <nkeynes@lxdream.org> |
date | Sat Sep 17 22:39:36 2011 +1000 (12 years ago) |
permissions | -rw-r--r-- |
last change | Fix structure packing on v55 nero images (64-bit) Add basic support for track mode 16 (CDDA + subchannel data, 2448 bytes) |
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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 <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;
45 static void video_glx_swap_buffers( void );
46 static void video_glx_print_info( FILE *out );
48 /* Prototypes for pbuffer support methods */
49 static void glx_pbuffer_init( display_driver_t driver );
50 static render_buffer_t glx_pbuffer_create_render_buffer( uint32_t width, uint32_t height, GLuint tex_id );
51 static void glx_pbuffer_destroy_render_buffer( render_buffer_t buffer );
52 static gboolean glx_pbuffer_set_render_target( render_buffer_t buffer );
53 static void glx_pbuffer_finish_render( render_buffer_t buffer );
54 static void glx_pbuffer_display_render_buffer( render_buffer_t buffer );
55 static void glx_pbuffer_load_frame_buffer( frame_buffer_t frame, render_buffer_t buffer );
56 static void glx_pbuffer_display_blank( uint32_t colour );
57 static gboolean glx_pbuffer_read_render_buffer( unsigned char *target, render_buffer_t buffer, int rowstride, int format );
59 /**
60 * Test if a specific extension is supported. From opengl.org
61 * @param extension extension name to check for
62 * @return TRUE if supported, otherwise FALSE.
63 */
64 gboolean isServerGLXExtensionSupported( Display *display, int screen,
65 const char *extension )
66 {
67 const char *extensions = NULL;
68 const char *start;
69 char *where, *terminator;
71 /* Extension names should not have spaces. */
72 where = strchr(extension, ' ');
73 if (where || *extension == '\0')
74 return 0;
75 extensions = glXQueryServerString(display, screen, GLX_EXTENSIONS);
76 start = extensions;
77 for (;;) {
78 where = strstr((const char *) start, extension);
79 if (!where)
80 break;
81 terminator = where + strlen(extension);
82 if (where == start || *(where - 1) == ' ')
83 if (*terminator == ' ' || *terminator == '\0')
84 return TRUE;
85 start = terminator;
86 }
87 return FALSE;
88 }
90 gboolean video_glx_init( Display *display, int screen )
91 {
92 int major, minor;
93 int glx_major, glx_minor, glx_error;
95 if( glx_is_initialized ) {
96 return TRUE;
97 }
99 Bool result = XQueryExtension( display, "GLX", &glx_major, &glx_minor, &glx_error ) &&
100 glXQueryVersion( display, &major, &minor );
101 if( result == False ) {
102 ERROR( "GLX not supported on display" );
103 return FALSE;
104 }
106 glx_version = (major*100) + minor;
108 #ifdef APPLE_BUILD
109 /* fbconfig is broken on at least the 10.5 GLX implementation */
110 glx_fbconfig_supported = FALSE;
111 #else
112 glx_fbconfig_supported = (glx_version >= 103 ||
113 isServerGLXExtensionSupported(display, screen,
114 "GLX_SGIX_fbconfig") );
115 #endif
116 glx_pbuffer_supported = (glx_version >= 103 ||
117 isServerGLXExtensionSupported(display, screen,
118 "GLX_SGIX_pbuffer") );
119 // glx_fbconfig_supported = FALSE;
120 if( glx_fbconfig_supported ) {
121 int nelem;
122 int fb_attribs[] = { GLX_DRAWABLE_TYPE,
123 GLX_PBUFFER_BIT|GLX_WINDOW_BIT,
124 GLX_RENDER_TYPE, GLX_RGBA_BIT,
125 GLX_DEPTH_SIZE, 24,
126 GLX_STENCIL_SIZE, 8, 0 };
127 GLXFBConfig *configs = glXChooseFBConfig( display, screen,
128 fb_attribs, &nelem );
130 if( configs == NULL || nelem == 0 ) {
131 /* Try a 16-bit depth buffer and see if it helps */
132 fb_attribs[5] = 16;
133 configs = glXChooseFBConfig( display, screen, fb_attribs, &nelem );
134 if( nelem > 0 ) {
135 WARN( "Using a 16-bit depth buffer - expect video glitches" );
136 }
138 }
139 if( configs == NULL || nelem == 0 ) {
140 /* Still didn't work. Fallback to 1.2 methods */
141 glx_fbconfig_supported = FALSE;
142 glx_pbuffer_supported = FALSE;
143 } else {
144 glx_fbconfig = configs[0];
145 glx_visual = glXGetVisualFromFBConfig(display, glx_fbconfig);
146 XFree(configs);
147 }
148 }
150 if( !glx_fbconfig_supported ) {
151 int attribs[] = { GLX_RGBA, GLX_DEPTH_SIZE, 24, GLX_STENCIL_SIZE, 8, 0 };
152 glx_visual = glXChooseVisual( display, screen, attribs );
153 if( glx_visual == NULL ) {
154 /* Try the 16-bit fallback here too */
155 attribs[2] = 16;
156 glx_visual = glXChooseVisual( display, screen, attribs );
157 if( glx_visual != NULL ) {
158 WARN( "Using a 16-bit depth buffer - expect video glitches" );
159 }
160 }
161 }
163 if( glx_visual == NULL ) {
164 return FALSE;
165 }
167 glx_is_initialized = TRUE;
168 return TRUE;
169 }
171 static void video_glx_print_info( FILE *out )
172 {
173 XWindowAttributes attr;
175 if( !XGetWindowAttributes(video_x11_display, video_x11_window, &attr) )
176 return; /* Failed */
177 int screen = XScreenNumberOfScreen(attr.screen);
179 fprintf( out, "GLX Server: %s %s\n", glXQueryServerString(video_x11_display, screen, GLX_VENDOR),
180 glXQueryServerString(video_x11_display, screen, GLX_VERSION) );
181 fprintf( out, "GLX Client: %s %s\n", glXGetClientString(video_x11_display, GLX_VENDOR),
182 glXGetClientString(video_x11_display, GLX_VERSION) );
183 fprintf( out, "GLX Server Extensions:\n" );
184 fprint_extensions( out, glXQueryServerString(video_x11_display, screen, GLX_EXTENSIONS) );
185 fprintf( out, "GLX Client Extensions:\n" );
186 fprint_extensions( out, glXGetClientString(video_x11_display, GLX_EXTENSIONS) );
187 fprintf( out, "GLX Extensions:\n" );
188 fprint_extensions( out, glXQueryExtensionsString(video_x11_display, screen) );
190 }
192 gboolean video_glx_init_context( Display *display, Window window )
193 {
194 if( glx_fbconfig_supported ) {
195 glx_context = glXCreateNewContext( display, glx_fbconfig,
196 GLX_RGBA_TYPE, NULL, True );
197 if( glx_context == NULL ) {
198 ERROR( "Unable to create a GLX Context.");
199 return FALSE;
200 }
202 if( glXMakeCurrent( display, window,
203 glx_context ) == False ) {
204 ERROR( "Unable to prepare GLX context for drawing" );
205 glXDestroyContext( display, glx_context );
206 return FALSE;
207 }
208 } else {
209 glx_context = glXCreateContext( display, glx_visual, None, True );
210 if( glx_context == NULL ) {
211 ERROR( "Unable to create a GLX Context.");
212 return FALSE;
213 }
215 if( glXMakeCurrent( display, window, glx_context ) == False ) {
216 ERROR( "Unable to prepare GLX context for drawing" );
217 glXDestroyContext( display, glx_context );
218 return FALSE;
219 }
220 }
222 if( !glXIsDirect(display, glx_context) ) {
223 WARN( "Not using direct rendering - this is likely to be slow" );
224 }
226 video_x11_display = display;
227 video_x11_window = window;
229 return TRUE;
230 }
232 gboolean video_glx_init_driver( display_driver_t driver )
233 {
234 driver->swap_buffers = video_glx_swap_buffers;
235 driver->print_info = video_glx_print_info;
236 driver->capabilities.has_gl = TRUE;
237 if( gl_fbo_is_supported() ) { // First preference
238 gl_fbo_init(driver);
239 } else if( glx_pbuffer_supported ) {
240 glx_pbuffer_init(driver);
241 } else {
242 ERROR( "Unable to create render buffers (requires either EXT_framebuffer_object or GLX 1.3+)" );
243 video_glx_shutdown();
244 return FALSE;
245 }
246 gl_vbo_init(driver);
247 return TRUE;
248 }
251 void video_glx_shutdown()
252 {
253 // texcache_gl_shutdown();
254 glx_is_initialized = FALSE;
255 if( glx_context != NULL ) {
256 glXDestroyContext( video_x11_display, glx_context );
257 glx_context = NULL;
258 }
259 if( glx_visual != NULL ) {
260 XFree(glx_visual);
261 glx_visual = NULL;
262 }
263 }
266 XVisualInfo *video_glx_get_visual()
267 {
268 return glx_visual;
269 }
272 int video_glx_load_font( const gchar *font_name )
273 {
274 int lists;
275 XFontStruct *font = XLoadQueryFont(video_x11_display, font_name );
276 if (font == NULL)
277 return -1;
279 lists = glGenLists(96);
280 glXUseXFont(font->fid, 32, 96, lists);
281 XFreeFont(video_x11_display, font);
282 return lists;
283 }
286 static void video_glx_swap_buffers( void )
287 {
288 glXSwapBuffers( video_x11_display, video_x11_window );
289 }
291 void video_glx_make_window_current( void )
292 {
293 glXMakeCurrent( video_x11_display, video_x11_window, glx_context );
294 }
297 // Pbuffer support
299 /**
300 * Construct the initial frame buffers and allocate ids for everything.
301 * The render handling driver methods are set to the fbo versions.
302 */
303 static void glx_pbuffer_init( display_driver_t driver )
304 {
305 GLint stencil_bits = 0;
307 /* Retrieve the number of stencil bits */
308 glGetIntegerv( GL_STENCIL_BITS, &stencil_bits );
309 driver->capabilities.stencil_bits = stencil_bits;
311 glGenTextures( 1, &glx_pbuffer_texture );
312 driver->create_render_buffer = glx_pbuffer_create_render_buffer;
313 driver->destroy_render_buffer = glx_pbuffer_destroy_render_buffer;
314 driver->set_render_target = glx_pbuffer_set_render_target;
315 driver->finish_render = glx_pbuffer_finish_render;
316 driver->display_render_buffer = glx_pbuffer_display_render_buffer;
317 driver->load_frame_buffer = glx_pbuffer_load_frame_buffer;
318 driver->display_blank = glx_pbuffer_display_blank;
319 driver->read_render_buffer = glx_pbuffer_read_render_buffer;
320 }
322 void glx_pbuffer_shutdown()
323 {
324 glDeleteTextures( 1, &glx_pbuffer_texture );
325 }
327 static render_buffer_t glx_pbuffer_create_render_buffer( uint32_t width, uint32_t height, GLuint tex_id )
328 {
329 int attribs[] = { GLX_PBUFFER_WIDTH, width, GLX_PBUFFER_HEIGHT, height,
330 GLX_PRESERVED_CONTENTS, True, 0 };
331 GLXPbuffer pb = glXCreatePbuffer( video_x11_display, glx_fbconfig, attribs );
332 if( pb == (GLXPbuffer)NULL ) {
333 ERROR( "Unable to create pbuffer" );
334 return NULL;
335 }
336 render_buffer_t buffer = calloc( sizeof(struct render_buffer), 1 );
337 buffer->width = width;
338 buffer->height = height;
339 buffer->buf_id = pb;
340 buffer->tex_id = tex_id;
341 return buffer;
342 }
344 static void glx_pbuffer_destroy_render_buffer( render_buffer_t buffer )
345 {
346 glXDestroyPbuffer( video_x11_display, (GLXPbuffer)buffer->buf_id );
347 buffer->buf_id = 0;
348 free( buffer );
349 }
351 static gboolean glx_pbuffer_set_render_target( render_buffer_t buffer )
352 {
353 glFinish();
354 if( glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context ) == False ) {
355 ERROR( "Make context current (pbuffer) failed!" );
356 }
357 /* setup the gl context */
358 glViewport( 0, 0, buffer->width, buffer->height );
359 glDrawBuffer(GL_FRONT);
361 return TRUE;
362 }
364 static void glx_pbuffer_finish_render( render_buffer_t buffer )
365 {
366 glFinish();
367 if( buffer->tex_id != 0 ) {
368 // The pbuffer should already be the current context, but just in case...
369 glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context );
370 glBindTexture( GL_TEXTURE_RECTANGLE_ARB, buffer->tex_id );
371 glCopyTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, 0, 0, buffer->width, buffer->height, 0 );
372 }
373 }
376 /**
377 * Render the texture holding the given buffer to the front window
378 * buffer.
379 */
380 static void glx_pbuffer_display_render_buffer( render_buffer_t buffer )
381 {
382 glFinish();
383 glReadBuffer( GL_FRONT );
384 glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context );
385 glBindTexture( GL_TEXTURE_RECTANGLE_ARB, glx_pbuffer_texture );
386 glCopyTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, 0, 0, buffer->width, buffer->height, 0 );
387 video_glx_make_window_current();
388 gl_texture_window( buffer->width, buffer->height, glx_pbuffer_texture, buffer->inverted );
389 }
391 static void glx_pbuffer_load_frame_buffer( frame_buffer_t frame, render_buffer_t buffer )
392 {
393 glFinish();
394 glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context );
395 GLenum type = colour_formats[frame->colour_format].type;
396 GLenum format = colour_formats[frame->colour_format].format;
397 int bpp = colour_formats[frame->colour_format].bpp;
398 int rowstride = (frame->rowstride / bpp) - frame->width;
400 gl_reset_state();
401 glPixelStorei( GL_UNPACK_ROW_LENGTH, rowstride );
402 glRasterPos2f(0.375, frame->height-0.375);
403 glPixelZoom( 1.0, 1.0 );
404 glDrawPixels( frame->width, frame->height, format, type, frame->data );
405 glFlush();
406 }
408 static void glx_pbuffer_display_blank( uint32_t colour )
409 {
410 glFinish();
411 video_glx_make_window_current();
412 gl_display_blank( colour );
413 }
415 static gboolean glx_pbuffer_read_render_buffer( unsigned char *target, render_buffer_t buffer,
416 int rowstride, int format )
417 {
418 glXMakeCurrent( video_x11_display, (GLXDrawable)buffer->buf_id, glx_context );
419 glReadBuffer( GL_FRONT );
420 return gl_read_render_buffer( target, buffer, rowstride, format );
421 }
.