filename | src/drivers/video_glx.c |
changeset | 863:a5e5310061e2 |
prev | 806:6ef1ce4a9dbc |
next | 982:2d6b3f29f878 |
author | nkeynes |
date | Wed Oct 29 23:51:58 2008 +0000 (15 years ago) |
permissions | -rw-r--r-- |
last change | Use regparam calling conventions for all functions called from translated code, along with a few other high-use functions. Can probably extend this to all functions, but as it is this is a nice performance boost |
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;
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, GLuint tex_id );
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_finish_render( render_buffer_t buffer );
51 static void glx_pbuffer_display_render_buffer( render_buffer_t buffer );
52 static void glx_pbuffer_load_frame_buffer( frame_buffer_t frame, render_buffer_t buffer );
53 static void glx_pbuffer_display_blank( uint32_t colour );
54 static gboolean glx_pbuffer_read_render_buffer( unsigned char *target, render_buffer_t buffer, int rowstride, int format );
56 /**
57 * Test if a specific extension is supported. From opengl.org
58 * @param extension extension name to check for
59 * @return TRUE if supported, otherwise FALSE.
60 */
61 gboolean isServerGLXExtensionSupported( Display *display, int screen,
62 const char *extension )
63 {
64 const char *extensions = NULL;
65 const char *start;
66 char *where, *terminator;
68 /* Extension names should not have spaces. */
69 where = strchr(extension, ' ');
70 if (where || *extension == '\0')
71 return 0;
72 extensions = glXQueryServerString(display, screen, GLX_EXTENSIONS);
73 start = extensions;
74 for (;;) {
75 where = strstr((const char *) start, extension);
76 if (!where)
77 break;
78 terminator = where + strlen(extension);
79 if (where == start || *(where - 1) == ' ')
80 if (*terminator == ' ' || *terminator == '\0')
81 return TRUE;
82 start = terminator;
83 }
84 return FALSE;
85 }
87 gboolean video_glx_init( Display *display, int screen )
88 {
89 int major, minor;
91 if( glx_is_initialized ) {
92 return TRUE;
93 }
95 Bool result = glXQueryVersion( display, &major, &minor );
96 if( result != False ) {
97 glx_version = (major*100) + minor;
98 }
99 #ifdef APPLE_BUILD
100 /* fbconfig is broken on at least the 10.5 GLX implementation */
101 glx_fbconfig_supported = FALSE;
102 #else
103 glx_fbconfig_supported = (glx_version >= 103 ||
104 isServerGLXExtensionSupported(display, screen,
105 "GLX_SGIX_fbconfig") );
106 #endif
107 glx_pbuffer_supported = (glx_version >= 103 ||
108 isServerGLXExtensionSupported(display, screen,
109 "GLX_SGIX_pbuffer") );
110 // glx_fbconfig_supported = FALSE;
111 if( glx_fbconfig_supported ) {
112 int nelem;
113 int fb_attribs[] = { GLX_DRAWABLE_TYPE,
114 GLX_PBUFFER_BIT|GLX_WINDOW_BIT,
115 GLX_RENDER_TYPE, GLX_RGBA_BIT,
116 GLX_DEPTH_SIZE, 24,
117 GLX_STENCIL_SIZE, 8, 0 };
118 GLXFBConfig *configs = glXChooseFBConfig( display, screen,
119 fb_attribs, &nelem );
121 if( configs == NULL || nelem == 0 ) {
122 /* Try a 16-bit depth buffer and see if it helps */
123 fb_attribs[5] = 16;
124 configs = glXChooseFBConfig( display, screen, fb_attribs, &nelem );
125 if( nelem > 0 ) {
126 WARN( "Using a 16-bit depth buffer - expect video glitches" );
127 }
129 }
130 if( configs == NULL || nelem == 0 ) {
131 /* Still didn't work. Fallback to 1.2 methods */
132 glx_fbconfig_supported = FALSE;
133 glx_pbuffer_supported = FALSE;
134 } else {
135 glx_fbconfig = configs[0];
136 glx_visual = glXGetVisualFromFBConfig(display, glx_fbconfig);
137 XFree(configs);
138 }
139 }
141 if( !glx_fbconfig_supported ) {
142 int attribs[] = { GLX_RGBA, GLX_DEPTH_SIZE, 24, GLX_STENCIL_SIZE, 8, 0 };
143 glx_visual = glXChooseVisual( display, screen, attribs );
144 if( glx_visual == NULL ) {
145 /* Try the 16-bit fallback here too */
146 attribs[2] = 16;
147 glx_visual = glXChooseVisual( display, screen, attribs );
148 if( glx_visual != NULL ) {
149 WARN( "Using a 16-bit depth buffer - expect video glitches" );
150 }
151 }
152 }
154 if( glx_visual == NULL ) {
155 return FALSE;
156 }
158 glx_is_initialized = TRUE;
159 return TRUE;
160 }
162 gboolean video_glx_init_context( Display *display, Window window )
163 {
164 if( glx_fbconfig_supported ) {
165 glx_context = glXCreateNewContext( display, glx_fbconfig,
166 GLX_RGBA_TYPE, NULL, True );
167 if( glx_context == NULL ) {
168 ERROR( "Unable to create a GLX Context.");
169 return FALSE;
170 }
172 if( glXMakeContextCurrent( display, window, window,
173 glx_context ) == False ) {
174 ERROR( "Unable to prepare GLX context for drawing" );
175 glXDestroyContext( display, glx_context );
176 return FALSE;
177 }
178 } else {
179 glx_context = glXCreateContext( display, glx_visual, None, True );
180 if( glx_context == NULL ) {
181 ERROR( "Unable to create a GLX Context.");
182 return FALSE;
183 }
185 if( glXMakeCurrent( display, window, glx_context ) == False ) {
186 ERROR( "Unable to prepare GLX context for drawing" );
187 glXDestroyContext( display, glx_context );
188 return FALSE;
189 }
190 }
192 if( !glXIsDirect(display, glx_context) ) {
193 WARN( "Not using direct rendering - this is likely to be slow" );
194 }
196 video_x11_display = display;
197 video_x11_window = window;
199 return TRUE;
200 }
202 gboolean video_glx_init_driver( display_driver_t driver )
203 {
204 if( gl_fbo_is_supported() ) { // First preference
205 gl_fbo_init(driver);
206 } else if( glx_pbuffer_supported ) {
207 glx_pbuffer_init(driver);
208 } else {
209 ERROR( "Unable to create render buffers (requires either EXT_framebuffer_object or GLX 1.3+)" );
210 video_glx_shutdown();
211 return FALSE;
212 }
213 return TRUE;
214 }
217 void video_glx_shutdown()
218 {
219 // texcache_gl_shutdown();
220 glx_is_initialized = FALSE;
221 if( glx_context != NULL ) {
222 glXDestroyContext( video_x11_display, glx_context );
223 glx_context = NULL;
224 }
225 if( glx_visual != NULL ) {
226 XFree(glx_visual);
227 glx_visual = NULL;
228 }
229 }
232 XVisualInfo *video_glx_get_visual()
233 {
234 return glx_visual;
235 }
238 int video_glx_load_font( const gchar *font_name )
239 {
240 int lists;
241 XFontStruct *font = XLoadQueryFont(video_x11_display, font_name );
242 if (font == NULL)
243 return -1;
245 lists = glGenLists(96);
246 glXUseXFont(font->fid, 32, 96, lists);
247 XFreeFont(video_x11_display, font);
248 return lists;
249 }
252 void video_glx_swap_buffers( void )
253 {
254 glXSwapBuffers( video_x11_display, video_x11_window );
255 }
257 void video_glx_make_window_current( void )
258 {
259 glXMakeCurrent( video_x11_display, video_x11_window, glx_context );
260 }
263 // Pbuffer support
265 /**
266 * Construct the initial frame buffers and allocate ids for everything.
267 * The render handling driver methods are set to the fbo versions.
268 */
269 static void glx_pbuffer_init( display_driver_t driver )
270 {
271 GLint stencil_bits = 0;
273 /* Retrieve the number of stencil bits */
274 glGetIntegerv( GL_STENCIL_BITS, &stencil_bits );
275 driver->capabilities.stencil_bits = stencil_bits;
277 glGenTextures( 1, &glx_pbuffer_texture );
278 driver->create_render_buffer = glx_pbuffer_create_render_buffer;
279 driver->destroy_render_buffer = glx_pbuffer_destroy_render_buffer;
280 driver->set_render_target = glx_pbuffer_set_render_target;
281 driver->finish_render = glx_pbuffer_finish_render;
282 driver->display_render_buffer = glx_pbuffer_display_render_buffer;
283 driver->load_frame_buffer = glx_pbuffer_load_frame_buffer;
284 driver->display_blank = glx_pbuffer_display_blank;
285 driver->read_render_buffer = glx_pbuffer_read_render_buffer;
286 }
288 void glx_pbuffer_shutdown()
289 {
290 glDeleteTextures( 1, &glx_pbuffer_texture );
291 }
293 static render_buffer_t glx_pbuffer_create_render_buffer( uint32_t width, uint32_t height, GLuint tex_id )
294 {
295 int attribs[] = { GLX_PBUFFER_WIDTH, width, GLX_PBUFFER_HEIGHT, height,
296 GLX_PRESERVED_CONTENTS, True, 0 };
297 GLXPbuffer pb = glXCreatePbuffer( video_x11_display, glx_fbconfig, attribs );
298 if( pb == (GLXPbuffer)NULL ) {
299 ERROR( "Unable to create pbuffer" );
300 return NULL;
301 }
302 render_buffer_t buffer = calloc( sizeof(struct render_buffer), 1 );
303 buffer->width = width;
304 buffer->height = height;
305 buffer->buf_id = pb;
306 buffer->tex_id = tex_id;
307 return buffer;
308 }
310 static void glx_pbuffer_destroy_render_buffer( render_buffer_t buffer )
311 {
312 glXDestroyPbuffer( video_x11_display, (GLXPbuffer)buffer->buf_id );
313 buffer->buf_id = 0;
314 free( buffer );
315 }
317 static gboolean glx_pbuffer_set_render_target( render_buffer_t buffer )
318 {
319 glFinish();
320 if( glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context ) == False ) {
321 ERROR( "Make context current (pbuffer) failed!" );
322 }
323 /* setup the gl context */
324 glViewport( 0, 0, buffer->width, buffer->height );
325 glDrawBuffer(GL_FRONT);
327 return TRUE;
328 }
330 static void glx_pbuffer_finish_render( render_buffer_t buffer )
331 {
332 glFinish();
333 if( buffer->tex_id != 0 ) {
334 // The pbuffer should already be the current context, but just in case...
335 glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context );
336 glBindTexture( GL_TEXTURE_RECTANGLE_ARB, buffer->tex_id );
337 glCopyTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, 0, 0, buffer->width, buffer->height, 0 );
338 }
339 }
342 /**
343 * Render the texture holding the given buffer to the front window
344 * buffer.
345 */
346 static void glx_pbuffer_display_render_buffer( render_buffer_t buffer )
347 {
348 glFinish();
349 glReadBuffer( GL_FRONT );
350 glDrawBuffer( GL_FRONT );
351 glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context );
352 glBindTexture( GL_TEXTURE_RECTANGLE_ARB, glx_pbuffer_texture );
353 glCopyTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, 0, 0, buffer->width, buffer->height, 0 );
354 video_glx_make_window_current();
355 gl_texture_window( buffer->width, buffer->height, glx_pbuffer_texture, buffer->inverted );
356 }
358 static void glx_pbuffer_load_frame_buffer( frame_buffer_t frame, render_buffer_t buffer )
359 {
360 glFinish();
361 glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context );
362 GLenum type = colour_formats[frame->colour_format].type;
363 GLenum format = colour_formats[frame->colour_format].format;
364 int bpp = colour_formats[frame->colour_format].bpp;
365 int rowstride = (frame->rowstride / bpp) - frame->width;
367 gl_reset_state();
368 glPixelStorei( GL_UNPACK_ROW_LENGTH, rowstride );
369 glRasterPos2f(0.375, frame->height-0.375);
370 glPixelZoom( 1.0, 1.0 );
371 glDrawPixels( frame->width, frame->height, format, type, frame->data );
372 glFlush();
373 }
375 static void glx_pbuffer_display_blank( uint32_t colour )
376 {
377 glFinish();
378 video_glx_make_window_current();
379 gl_display_blank( colour );
380 }
382 static gboolean glx_pbuffer_read_render_buffer( unsigned char *target, render_buffer_t buffer,
383 int rowstride, int format )
384 {
385 glXMakeCurrent( video_x11_display, (GLXDrawable)buffer->buf_id, glx_context );
386 glReadBuffer( GL_FRONT );
387 return gl_read_render_buffer( target, buffer, rowstride, format );
388 }
.