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.
20 #include "pvr2/pvr2.h"
21 #include "drivers/gl_common.h"
24 #include "drivers/video_glx.h"
27 * General X11 parameters. The front-end driver is expected to set this up
28 * by calling video_glx_init after initializing itself.
30 Display *video_x11_display = NULL;
31 Window video_x11_window = 0;
32 static gboolean glsl_loaded = FALSE;
34 static int glx_version = 100;
35 static XVisualInfo *glx_visual = NULL;
36 static GLXFBConfig glx_fbconfig;
37 static GLXContext glx_context = NULL;
38 static gboolean glx_is_initialized = FALSE;
39 static gboolean glx_fbconfig_supported = FALSE;
40 static gboolean glx_pbuffer_supported = FALSE;
41 static int glx_pbuffer_texture = 0;
43 /* Prototypes for pbuffer support methods */
44 static void glx_pbuffer_init( display_driver_t driver );
45 static render_buffer_t glx_pbuffer_create_render_buffer( uint32_t width, uint32_t height );
46 static void glx_pbuffer_destroy_render_buffer( render_buffer_t buffer );
47 static gboolean glx_pbuffer_set_render_target( render_buffer_t buffer );
48 static gboolean glx_pbuffer_display_render_buffer( render_buffer_t buffer );
49 static void glx_pbuffer_load_frame_buffer( frame_buffer_t frame, render_buffer_t buffer );
50 static gboolean glx_pbuffer_display_blank( uint32_t colour );
51 static gboolean glx_pbuffer_read_render_buffer( unsigned char *target, render_buffer_t buffer, int rowstride, int format );
54 * Test if a specific extension is supported. From opengl.org
55 * @param extension extension name to check for
56 * @return TRUE if supported, otherwise FALSE.
58 gboolean isServerGLXExtensionSupported( Display *display, int screen,
59 const char *extension )
61 const char *extensions = NULL;
63 char *where, *terminator;
65 /* Extension names should not have spaces. */
66 where = strchr(extension, ' ');
67 if (where || *extension == '\0')
69 extensions = glXQueryServerString(display, screen, GLX_EXTENSIONS);
72 where = strstr((const char *) start, extension);
75 terminator = where + strlen(extension);
76 if (where == start || *(where - 1) == ' ')
77 if (*terminator == ' ' || *terminator == '\0')
84 gboolean video_glx_init( Display *display, int screen )
88 if( glx_is_initialized ) {
92 Bool result = glXQueryVersion( display, &major, &minor );
93 if( result != False ) {
94 glx_version = (major*100) + minor;
97 glx_fbconfig_supported = (glx_version >= 103 ||
98 isServerGLXExtensionSupported(display, screen,
99 "GLX_SGIX_fbconfig") );
100 glx_pbuffer_supported = (glx_version >= 103 ||
101 isServerGLXExtensionSupported(display, screen,
102 "GLX_SGIX_pbuffer") );
104 if( glx_fbconfig_supported ) {
106 int fb_attribs[] = { GLX_DRAWABLE_TYPE,
107 GLX_PBUFFER_BIT|GLX_WINDOW_BIT,
108 GLX_RENDER_TYPE, GLX_RGBA_BIT,
109 GLX_DEPTH_SIZE, 24, 0 };
110 GLXFBConfig *configs = glXChooseFBConfig( display, screen,
111 fb_attribs, &nelem );
113 if( configs == NULL || nelem == 0 ) {
114 /* Didn't work. Fallback to 1.2 methods */
115 glx_fbconfig_supported = FALSE;
116 glx_pbuffer_supported = FALSE;
118 glx_fbconfig = configs[0];
119 glx_visual = glXGetVisualFromFBConfig(display, glx_fbconfig);
124 if( !glx_fbconfig_supported ) {
125 int attribs[] = { GLX_RGBA, GLX_DEPTH_SIZE, 24, 0 };
126 glx_visual = glXChooseVisual( display, screen, attribs );
129 if( glx_visual == NULL ) {
133 glx_is_initialized = TRUE;
137 gboolean video_glx_init_context( Display *display, Window window )
139 if( glx_fbconfig_supported ) {
140 glx_context = glXCreateNewContext( display, glx_fbconfig,
141 GLX_RGBA_TYPE, NULL, True );
142 if( glx_context == NULL ) {
143 ERROR( "Unable to create a GLX Context.");
147 if( glXMakeContextCurrent( display, window, window,
148 glx_context ) == False ) {
149 ERROR( "Unable to prepare GLX context for drawing" );
150 glXDestroyContext( display, glx_context );
154 glx_context = glXCreateContext( display, glx_visual, None, True );
155 if( glx_context == NULL ) {
156 ERROR( "Unable to create a GLX Context.");
160 if( glXMakeCurrent( display, window, glx_context ) == False ) {
161 ERROR( "Unable to prepare GLX context for drawing" );
162 glXDestroyContext( display, glx_context );
167 if( !glXIsDirect(display, glx_context) ) {
168 WARN( "Not using direct rendering - this is likely to be slow" );
172 video_x11_display = display;
173 video_x11_window = window;
178 gboolean video_glx_init_driver( display_driver_t driver )
180 if( gl_fbo_is_supported() ) { // First preference
182 } else if( glx_pbuffer_supported ) {
183 glx_pbuffer_init(driver);
185 ERROR( "Unable to create render buffers (requires either EXT_framebuffer_object or GLX 1.3+)" );
186 video_glx_shutdown();
193 void video_glx_shutdown()
195 // texcache_gl_shutdown();
196 glx_is_initialized = FALSE;
197 if( glx_context != NULL ) {
198 glXDestroyContext( video_x11_display, glx_context );
201 if( glx_visual != NULL ) {
208 XVisualInfo *video_glx_get_visual()
214 int video_glx_load_font( const gchar *font_name )
217 XFontStruct *font = XLoadQueryFont(video_x11_display, font_name );
221 lists = glGenLists(96);
222 glXUseXFont(font->fid, 32, 96, lists);
223 XFreeFont(video_x11_display, font);
228 void video_glx_swap_buffers( void )
230 glXSwapBuffers( video_x11_display, video_x11_window );
233 void video_glx_make_window_current( void )
235 glXMakeCurrent( video_x11_display, video_x11_window, glx_context );
242 * Construct the initial frame buffers and allocate ids for everything.
243 * The render handling driver methods are set to the fbo versions.
245 static void glx_pbuffer_init( display_driver_t driver )
247 glGenTextures( 1, &glx_pbuffer_texture );
248 driver->create_render_buffer = glx_pbuffer_create_render_buffer;
249 driver->destroy_render_buffer = glx_pbuffer_destroy_render_buffer;
250 driver->set_render_target = glx_pbuffer_set_render_target;
251 driver->display_render_buffer = glx_pbuffer_display_render_buffer;
252 driver->load_frame_buffer = glx_pbuffer_load_frame_buffer;
253 driver->display_blank = glx_pbuffer_display_blank;
254 driver->read_render_buffer = glx_pbuffer_read_render_buffer;
257 void glx_pbuffer_shutdown()
259 glDeleteTextures( 1, &glx_pbuffer_texture );
262 static render_buffer_t glx_pbuffer_create_render_buffer( uint32_t width, uint32_t height )
264 int attribs[] = { GLX_PBUFFER_WIDTH, width, GLX_PBUFFER_HEIGHT, height,
265 GLX_PRESERVED_CONTENTS, True, 0 };
266 GLXPbuffer pb = glXCreatePbuffer( video_x11_display, glx_fbconfig, attribs );
267 if( pb == (GLXPbuffer)NULL ) {
268 ERROR( "Unable to create pbuffer" );
271 render_buffer_t buffer = calloc( sizeof(struct render_buffer), 1 );
272 buffer->width = width;
273 buffer->height = height;
278 static void glx_pbuffer_destroy_render_buffer( render_buffer_t buffer )
280 glXDestroyPbuffer( video_x11_display, (GLXPbuffer)buffer->buf_id );
285 static gboolean glx_pbuffer_set_render_target( render_buffer_t buffer )
288 if( glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context ) == False ) {
289 ERROR( "Make context current (pbuffer) failed!" );
291 /* setup the gl context */
292 glViewport( 0, 0, buffer->width, buffer->height );
293 glDrawBuffer(GL_FRONT);
299 * Render the texture holding the given buffer to the front window
302 static gboolean glx_pbuffer_display_render_buffer( render_buffer_t buffer )
305 glReadBuffer( GL_FRONT );
306 glDrawBuffer( GL_FRONT );
307 glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context );
308 glBindTexture( GL_TEXTURE_RECTANGLE_ARB, glx_pbuffer_texture );
309 glCopyTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, 0, 0, buffer->width, buffer->height, 0 );
310 video_glx_make_window_current();
311 gl_texture_window( buffer->width, buffer->height, glx_pbuffer_texture, buffer->inverted );
315 static void glx_pbuffer_load_frame_buffer( frame_buffer_t frame, render_buffer_t buffer )
318 glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context );
319 GLenum type = colour_formats[frame->colour_format].type;
320 GLenum format = colour_formats[frame->colour_format].format;
321 int bpp = colour_formats[frame->colour_format].bpp;
322 int rowstride = (frame->rowstride / bpp) - frame->width;
325 glPixelStorei( GL_UNPACK_ROW_LENGTH, rowstride );
326 glRasterPos2f(0.375, frame->height-0.375);
327 glPixelZoom( 1.0, 1.0 );
328 glDrawPixels( frame->width, frame->height, format, type, frame->data );
332 static gboolean glx_pbuffer_display_blank( uint32_t colour )
335 video_glx_make_window_current();
336 return gl_display_blank( colour );
339 static gboolean glx_pbuffer_read_render_buffer( unsigned char *target, render_buffer_t buffer,
340 int rowstride, int format )
342 glXMakeCurrent( video_x11_display, (GLXDrawable)buffer->buf_id, glx_context );
343 glReadBuffer( GL_FRONT );
344 return gl_read_render_buffer( target, buffer, rowstride, format );
.