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.
24 #include "pvr2/pvr2.h"
25 #include "pvr2/glutil.h"
26 #include "drivers/video_glx.h"
27 #include "drivers/video_gl.h"
30 * General X11 parameters. The front-end driver is expected to set this up
31 * by calling video_glx_init after initializing itself.
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 );
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.
61 gboolean isServerGLXExtensionSupported( Display *display, int screen,
62 const char *extension )
64 const char *extensions = NULL;
66 char *where, *terminator;
68 /* Extension names should not have spaces. */
69 where = strchr(extension, ' ');
70 if (where || *extension == '\0')
72 extensions = glXQueryServerString(display, screen, GLX_EXTENSIONS);
75 where = strstr((const char *) start, extension);
78 terminator = where + strlen(extension);
79 if (where == start || *(where - 1) == ' ')
80 if (*terminator == ' ' || *terminator == '\0')
87 gboolean video_glx_init( Display *display, int screen )
91 if( glx_is_initialized ) {
95 Bool result = glXQueryVersion( display, &major, &minor );
96 if( result != False ) {
97 glx_version = (major*100) + minor;
100 /* fbconfig is broken on at least the 10.5 GLX implementation */
101 glx_fbconfig_supported = FALSE;
103 glx_fbconfig_supported = (glx_version >= 103 ||
104 isServerGLXExtensionSupported(display, screen,
105 "GLX_SGIX_fbconfig") );
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 ) {
113 int fb_attribs[] = { GLX_DRAWABLE_TYPE,
114 GLX_PBUFFER_BIT|GLX_WINDOW_BIT,
115 GLX_RENDER_TYPE, GLX_RGBA_BIT,
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 */
124 configs = glXChooseFBConfig( display, screen, fb_attribs, &nelem );
126 WARN( "Using a 16-bit depth buffer - expect video glitches" );
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;
135 glx_fbconfig = configs[0];
136 glx_visual = glXGetVisualFromFBConfig(display, glx_fbconfig);
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 */
147 glx_visual = glXChooseVisual( display, screen, attribs );
148 if( glx_visual != NULL ) {
149 WARN( "Using a 16-bit depth buffer - expect video glitches" );
154 if( glx_visual == NULL ) {
158 glx_is_initialized = TRUE;
162 gboolean video_glx_init_context( Display *display, Window window )
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.");
172 if( glXMakeContextCurrent( display, window, window,
173 glx_context ) == False ) {
174 ERROR( "Unable to prepare GLX context for drawing" );
175 glXDestroyContext( display, glx_context );
179 glx_context = glXCreateContext( display, glx_visual, None, True );
180 if( glx_context == NULL ) {
181 ERROR( "Unable to create a GLX Context.");
185 if( glXMakeCurrent( display, window, glx_context ) == False ) {
186 ERROR( "Unable to prepare GLX context for drawing" );
187 glXDestroyContext( display, glx_context );
192 if( !glXIsDirect(display, glx_context) ) {
193 WARN( "Not using direct rendering - this is likely to be slow" );
196 video_x11_display = display;
197 video_x11_window = window;
202 gboolean video_glx_init_driver( display_driver_t driver )
204 if( gl_fbo_is_supported() ) { // First preference
206 } else if( glx_pbuffer_supported ) {
207 glx_pbuffer_init(driver);
209 ERROR( "Unable to create render buffers (requires either EXT_framebuffer_object or GLX 1.3+)" );
210 video_glx_shutdown();
217 void video_glx_shutdown()
219 // texcache_gl_shutdown();
220 glx_is_initialized = FALSE;
221 if( glx_context != NULL ) {
222 glXDestroyContext( video_x11_display, glx_context );
225 if( glx_visual != NULL ) {
232 XVisualInfo *video_glx_get_visual()
238 int video_glx_load_font( const gchar *font_name )
241 XFontStruct *font = XLoadQueryFont(video_x11_display, font_name );
245 lists = glGenLists(96);
246 glXUseXFont(font->fid, 32, 96, lists);
247 XFreeFont(video_x11_display, font);
252 void video_glx_swap_buffers( void )
254 glXSwapBuffers( video_x11_display, video_x11_window );
257 void video_glx_make_window_current( void )
259 glXMakeCurrent( video_x11_display, video_x11_window, glx_context );
266 * Construct the initial frame buffers and allocate ids for everything.
267 * The render handling driver methods are set to the fbo versions.
269 static void glx_pbuffer_init( display_driver_t driver )
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;
288 void glx_pbuffer_shutdown()
290 glDeleteTextures( 1, &glx_pbuffer_texture );
293 static render_buffer_t glx_pbuffer_create_render_buffer( uint32_t width, uint32_t height, GLuint tex_id )
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" );
302 render_buffer_t buffer = calloc( sizeof(struct render_buffer), 1 );
303 buffer->width = width;
304 buffer->height = height;
306 buffer->tex_id = tex_id;
310 static void glx_pbuffer_destroy_render_buffer( render_buffer_t buffer )
312 glXDestroyPbuffer( video_x11_display, (GLXPbuffer)buffer->buf_id );
317 static gboolean glx_pbuffer_set_render_target( render_buffer_t buffer )
320 if( glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context ) == False ) {
321 ERROR( "Make context current (pbuffer) failed!" );
323 /* setup the gl context */
324 glViewport( 0, 0, buffer->width, buffer->height );
325 glDrawBuffer(GL_FRONT);
330 static void glx_pbuffer_finish_render( render_buffer_t buffer )
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 );
343 * Render the texture holding the given buffer to the front window
346 static void glx_pbuffer_display_render_buffer( render_buffer_t buffer )
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 );
358 static void glx_pbuffer_load_frame_buffer( frame_buffer_t frame, render_buffer_t buffer )
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;
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 );
375 static void glx_pbuffer_display_blank( uint32_t colour )
378 video_glx_make_window_current();
379 gl_display_blank( colour );
382 static gboolean glx_pbuffer_read_render_buffer( unsigned char *target, render_buffer_t buffer,
383 int rowstride, int format )
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 );
.