4 * Shared functions for all X11-based display drivers.
6 * Copyright (c) 2005 Nathan Keynes.
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.
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.
23 #include "pvr2/pvr2.h"
24 #include "drivers/video_glx.h"
25 #include "drivers/gl_common.h"
28 * General X11 parameters. The front-end driver is expected to set this up
29 * by calling video_glx_init after initializing itself.
31 Display *video_x11_display = NULL;
32 Window video_x11_window = 0;
33 static gboolean glsl_loaded = FALSE;
35 static int glx_version = 100;
36 static XVisualInfo *glx_visual;
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 int 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 gboolean 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 gboolean 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 );
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.
59 gboolean isServerGLXExtensionSupported( Display *display, int screen,
60 const char *extension )
62 const char *extensions = NULL;
64 char *where, *terminator;
66 /* Extension names should not have spaces. */
67 where = strchr(extension, ' ');
68 if (where || *extension == '\0')
70 extensions = glXQueryServerString(display, screen, GLX_EXTENSIONS);
73 where = strstr((const char *) start, extension);
76 terminator = where + strlen(extension);
77 if (where == start || *(where - 1) == ' ')
78 if (*terminator == ' ' || *terminator == '\0')
85 gboolean video_glx_init( Display *display, int screen )
89 if( glx_is_initialized ) {
93 Bool result = glXQueryVersion( display, &major, &minor );
94 if( result != False ) {
95 glx_version = (major*100) + minor;
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 ) {
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;
119 glx_fbconfig = configs[0];
120 glx_visual = glXGetVisualFromFBConfig(display, glx_fbconfig);
125 if( !glx_fbconfig_supported ) {
126 int attribs[] = { GLX_RGBA, GLX_DEPTH_SIZE, 24, 0 };
127 glx_visual = glXChooseVisual( display, screen, attribs );
129 glx_is_initialized = TRUE;
133 gboolean video_glx_init_context( Display *display, Window window )
135 if( glx_fbconfig_supported ) {
136 glx_context = glXCreateNewContext( display, glx_fbconfig,
137 GLX_RGBA_TYPE, NULL, True );
138 if( glx_context == NULL ) {
139 ERROR( "Unable to create a GLX Context.");
143 if( glXMakeContextCurrent( display, window, window,
144 glx_context ) == False ) {
145 ERROR( "Unable to prepare GLX context for drawing" );
146 glXDestroyContext( display, glx_context );
150 glx_context = glXCreateContext( display, glx_visual, None, True );
151 if( glx_context == NULL ) {
152 ERROR( "Unable to create a GLX Context.");
156 if( glXMakeCurrent( display, window, glx_context ) == False ) {
157 ERROR( "Unable to prepare GLX context for drawing" );
158 glXDestroyContext( display, glx_context );
163 if( !glXIsDirect(display, glx_context) ) {
164 WARN( "Not using direct rendering - this is likely to be slow" );
168 video_x11_display = display;
169 video_x11_window = window;
174 gboolean video_glx_init_driver( display_driver_t driver )
176 if( gl_fbo_is_supported() ) { // First preference
178 } else if( glx_pbuffer_supported ) {
179 glx_pbuffer_init(driver);
181 ERROR( "Unable to create render buffers (requires either EXT_framebuffer_object or GLX 1.3+)" );
182 video_glx_shutdown();
189 void video_glx_shutdown()
191 // texcache_gl_shutdown();
192 glx_is_initialized = FALSE;
193 if( glx_context != NULL ) {
194 glXDestroyContext( video_x11_display, glx_context );
197 if( glx_visual != NULL ) {
204 XVisualInfo *video_glx_get_visual()
210 int video_glx_load_font( const gchar *font_name )
213 XFontStruct *font = XLoadQueryFont(video_x11_display, font_name );
217 lists = glGenLists(96);
218 glXUseXFont(font->fid, 32, 96, lists);
219 XFreeFont(video_x11_display, font);
224 void video_glx_swap_buffers( void )
226 glXSwapBuffers( video_x11_display, video_x11_window );
229 void video_glx_make_window_current( void )
231 glXMakeCurrent( video_x11_display, video_x11_window, glx_context );
238 * Construct the initial frame buffers and allocate ids for everything.
239 * The render handling driver methods are set to the fbo versions.
241 static void glx_pbuffer_init( display_driver_t driver )
243 glGenTextures( 1, &glx_pbuffer_texture );
244 driver->create_render_buffer = glx_pbuffer_create_render_buffer;
245 driver->destroy_render_buffer = glx_pbuffer_destroy_render_buffer;
246 driver->set_render_target = glx_pbuffer_set_render_target;
247 driver->display_render_buffer = glx_pbuffer_display_render_buffer;
248 driver->load_frame_buffer = glx_pbuffer_load_frame_buffer;
249 driver->display_blank = glx_pbuffer_display_blank;
250 driver->read_render_buffer = glx_pbuffer_read_render_buffer;
253 void glx_pbuffer_shutdown()
255 glDeleteTextures( 1, &glx_pbuffer_texture );
258 static render_buffer_t glx_pbuffer_create_render_buffer( uint32_t width, uint32_t height )
260 int attribs[] = { GLX_PBUFFER_WIDTH, width, GLX_PBUFFER_HEIGHT, height,
261 GLX_PRESERVED_CONTENTS, True, 0 };
262 GLXPbuffer pb = glXCreatePbuffer( video_x11_display, glx_fbconfig, attribs );
263 if( pb == (GLXPbuffer)NULL ) {
264 ERROR( "Unable to create pbuffer" );
267 render_buffer_t buffer = calloc( sizeof(struct render_buffer), 1 );
268 buffer->width = width;
269 buffer->height = height;
274 static void glx_pbuffer_destroy_render_buffer( render_buffer_t buffer )
276 glXDestroyPbuffer( video_x11_display, (GLXPbuffer)buffer->buf_id );
281 static gboolean glx_pbuffer_set_render_target( render_buffer_t buffer )
284 if( glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context ) == False ) {
285 ERROR( "Make context current (pbuffer) failed!" );
287 /* setup the gl context */
288 glViewport( 0, 0, buffer->width, buffer->height );
289 glDrawBuffer(GL_FRONT);
295 * Render the texture holding the given buffer to the front window
298 static gboolean glx_pbuffer_display_render_buffer( render_buffer_t buffer )
301 glReadBuffer( GL_FRONT );
302 glDrawBuffer( GL_FRONT );
303 glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context );
304 glBindTexture( GL_TEXTURE_RECTANGLE_ARB, glx_pbuffer_texture );
305 glCopyTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, 0, 0, buffer->width, buffer->height, 0 );
306 video_glx_make_window_current();
307 gl_texture_window( buffer->width, buffer->height, glx_pbuffer_texture, buffer->inverted );
311 static void glx_pbuffer_load_frame_buffer( frame_buffer_t frame, render_buffer_t buffer )
314 glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context );
315 GLenum type = colour_formats[frame->colour_format].type;
316 GLenum format = colour_formats[frame->colour_format].format;
317 int bpp = colour_formats[frame->colour_format].bpp;
318 int rowstride = (frame->rowstride / bpp) - frame->width;
321 glPixelStorei( GL_UNPACK_ROW_LENGTH, rowstride );
322 glRasterPos2f(0.375, frame->height-0.375);
323 glPixelZoom( 1.0, 1.0 );
324 glDrawPixels( frame->width, frame->height, format, type, frame->data );
328 static gboolean glx_pbuffer_display_blank( uint32_t colour )
331 video_glx_make_window_current();
332 return gl_display_blank( colour );
335 static gboolean glx_pbuffer_read_render_buffer( unsigned char *target, render_buffer_t buffer,
336 int rowstride, int format )
338 glXMakeCurrent( video_x11_display, (GLXDrawable)buffer->buf_id, glx_context );
339 glReadBuffer( GL_FRONT );
340 return gl_read_render_buffer( target, buffer, rowstride, format );
.