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;
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 );
128 glx_is_initialized = TRUE;
132 gboolean video_glx_init_context( Display *display, Window window )
134 if( glx_fbconfig_supported ) {
135 glx_context = glXCreateNewContext( display, glx_fbconfig,
136 GLX_RGBA_TYPE, NULL, True );
137 if( glx_context == NULL ) {
138 ERROR( "Unable to create a GLX Context.");
142 if( glXMakeContextCurrent( display, window, window,
143 glx_context ) == False ) {
144 ERROR( "Unable to prepare GLX context for drawing" );
145 glXDestroyContext( display, glx_context );
149 glx_context = glXCreateContext( display, glx_visual, None, True );
150 if( glx_context == NULL ) {
151 ERROR( "Unable to create a GLX Context.");
155 if( glXMakeCurrent( display, window, glx_context ) == False ) {
156 ERROR( "Unable to prepare GLX context for drawing" );
157 glXDestroyContext( display, glx_context );
162 if( !glXIsDirect(display, glx_context) ) {
163 WARN( "Not using direct rendering - this is likely to be slow" );
167 video_x11_display = display;
168 video_x11_window = window;
173 gboolean video_glx_init_driver( display_driver_t driver )
175 if( gl_fbo_is_supported() ) { // First preference
177 } else if( glx_pbuffer_supported ) {
178 glx_pbuffer_init(driver);
180 ERROR( "Unable to create render buffers (requires either EXT_framebuffer_object or GLX 1.3+)" );
181 video_glx_shutdown();
188 void video_glx_shutdown()
190 // texcache_gl_shutdown();
191 glx_is_initialized = FALSE;
192 if( glx_context != NULL ) {
193 glXDestroyContext( video_x11_display, glx_context );
196 if( glx_visual != NULL ) {
203 XVisualInfo *video_glx_get_visual()
209 int video_glx_load_font( const gchar *font_name )
212 XFontStruct *font = XLoadQueryFont(video_x11_display, font_name );
216 lists = glGenLists(96);
217 glXUseXFont(font->fid, 32, 96, lists);
218 XFreeFont(video_x11_display, font);
223 void video_glx_swap_buffers( void )
225 glXSwapBuffers( video_x11_display, video_x11_window );
228 void video_glx_make_window_current( void )
230 glXMakeCurrent( video_x11_display, video_x11_window, glx_context );
237 * Construct the initial frame buffers and allocate ids for everything.
238 * The render handling driver methods are set to the fbo versions.
240 static void glx_pbuffer_init( display_driver_t driver )
242 glGenTextures( 1, &glx_pbuffer_texture );
243 driver->create_render_buffer = glx_pbuffer_create_render_buffer;
244 driver->destroy_render_buffer = glx_pbuffer_destroy_render_buffer;
245 driver->set_render_target = glx_pbuffer_set_render_target;
246 driver->display_render_buffer = glx_pbuffer_display_render_buffer;
247 driver->load_frame_buffer = glx_pbuffer_load_frame_buffer;
248 driver->display_blank = glx_pbuffer_display_blank;
249 driver->read_render_buffer = glx_pbuffer_read_render_buffer;
252 void glx_pbuffer_shutdown()
254 glDeleteTextures( 1, &glx_pbuffer_texture );
257 static render_buffer_t glx_pbuffer_create_render_buffer( uint32_t width, uint32_t height )
259 int attribs[] = { GLX_PBUFFER_WIDTH, width, GLX_PBUFFER_HEIGHT, height,
260 GLX_PRESERVED_CONTENTS, True, 0 };
261 GLXPbuffer pb = glXCreatePbuffer( video_x11_display, glx_fbconfig, attribs );
262 if( pb == (GLXPbuffer)NULL ) {
263 ERROR( "Unable to create pbuffer" );
266 render_buffer_t buffer = calloc( sizeof(struct render_buffer), 1 );
267 buffer->width = width;
268 buffer->height = height;
273 static void glx_pbuffer_destroy_render_buffer( render_buffer_t buffer )
275 glXDestroyPbuffer( video_x11_display, (GLXPbuffer)buffer->buf_id );
280 static gboolean glx_pbuffer_set_render_target( render_buffer_t buffer )
283 if( glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context ) == False ) {
284 ERROR( "Make context current (pbuffer) failed!" );
286 /* setup the gl context */
287 glViewport( 0, 0, buffer->width, buffer->height );
288 glDrawBuffer(GL_FRONT);
294 * Render the texture holding the given buffer to the front window
297 static gboolean glx_pbuffer_display_render_buffer( render_buffer_t buffer )
300 glReadBuffer( GL_FRONT );
301 glDrawBuffer( GL_FRONT );
302 glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context );
303 glBindTexture( GL_TEXTURE_RECTANGLE_ARB, glx_pbuffer_texture );
304 glCopyTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, 0, 0, buffer->width, buffer->height, 0 );
305 video_glx_make_window_current();
306 gl_texture_window( buffer->width, buffer->height, glx_pbuffer_texture, buffer->inverted );
310 static void glx_pbuffer_load_frame_buffer( frame_buffer_t frame, render_buffer_t buffer )
313 glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context );
314 GLenum type = colour_formats[frame->colour_format].type;
315 GLenum format = colour_formats[frame->colour_format].format;
316 int bpp = colour_formats[frame->colour_format].bpp;
317 int rowstride = (frame->rowstride / bpp) - frame->width;
320 glPixelStorei( GL_UNPACK_ROW_LENGTH, rowstride );
321 glRasterPos2f(0.375, frame->height-0.375);
322 glPixelZoom( 1.0, 1.0 );
323 glDrawPixels( frame->width, frame->height, format, type, frame->data );
327 static gboolean glx_pbuffer_display_blank( uint32_t colour )
330 video_glx_make_window_current();
331 return gl_display_blank( colour );
334 static gboolean glx_pbuffer_read_render_buffer( unsigned char *target, render_buffer_t buffer,
335 int rowstride, int format )
337 glXMakeCurrent( video_x11_display, (GLXDrawable)buffer->buf_id, glx_context );
338 glReadBuffer( GL_FRONT );
339 return gl_read_render_buffer( target, buffer, rowstride, format );
.