Search
lxdream.org :: lxdream/src/drivers/video_glx.c
lxdream 0.9.1
released Jun 29
Download Now
filename src/drivers/video_glx.c
changeset 736:a02d1475ccfd
prev703:585c66692be7
next805:b355f7b3ff2e
author nkeynes
date Mon Jul 14 07:44:42 2008 +0000 (13 years ago)
permissions -rw-r--r--
last change Re-indent everything consistently
Fix include guards for consistency as well
file annotate diff log raw
nkeynes@545
     1
/**
nkeynes@586
     2
 * $Id$
nkeynes@545
     3
 *
nkeynes@545
     4
 * Shared functions for all X11-based display drivers.
nkeynes@545
     5
 *
nkeynes@545
     6
 * Copyright (c) 2005 Nathan Keynes.
nkeynes@545
     7
 *
nkeynes@545
     8
 * This program is free software; you can redistribute it and/or modify
nkeynes@545
     9
 * it under the terms of the GNU General Public License as published by
nkeynes@545
    10
 * the Free Software Foundation; either version 2 of the License, or
nkeynes@545
    11
 * (at your option) any later version.
nkeynes@545
    12
 *
nkeynes@545
    13
 * This program is distributed in the hope that it will be useful,
nkeynes@545
    14
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
nkeynes@545
    15
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
nkeynes@545
    16
 * GNU General Public License for more details.
nkeynes@545
    17
 */
nkeynes@545
    18
nkeynes@653
    19
#include <string.h>
nkeynes@586
    20
#include "display.h"
nkeynes@545
    21
#include <X11/Xlib.h>
nkeynes@545
    22
#include <GL/glx.h>
nkeynes@676
    23
#include <string.h>
nkeynes@653
    24
#include "pvr2/pvr2.h"
nkeynes@653
    25
#include "pvr2/glutil.h"
nkeynes@545
    26
#include "drivers/video_glx.h"
nkeynes@653
    27
#include "drivers/video_gl.h"
nkeynes@545
    28
nkeynes@545
    29
/**
nkeynes@545
    30
 * General X11 parameters. The front-end driver is expected to set this up
nkeynes@545
    31
 * by calling video_glx_init after initializing itself.
nkeynes@545
    32
 */
nkeynes@545
    33
Display *video_x11_display = NULL;
nkeynes@545
    34
Window video_x11_window = 0;
nkeynes@545
    35
nkeynes@545
    36
static int glx_version = 100;
nkeynes@606
    37
static XVisualInfo *glx_visual = NULL;
nkeynes@545
    38
static GLXFBConfig glx_fbconfig;
nkeynes@545
    39
static GLXContext glx_context = NULL;
nkeynes@545
    40
static gboolean glx_is_initialized = FALSE;
nkeynes@545
    41
static gboolean glx_fbconfig_supported = FALSE;
nkeynes@545
    42
static gboolean glx_pbuffer_supported = FALSE;
nkeynes@669
    43
static GLuint glx_pbuffer_texture = 0; 
nkeynes@545
    44
nkeynes@545
    45
/* Prototypes for pbuffer support methods */
nkeynes@545
    46
static void glx_pbuffer_init( display_driver_t driver );
nkeynes@545
    47
static render_buffer_t glx_pbuffer_create_render_buffer( uint32_t width, uint32_t height );
nkeynes@545
    48
static void glx_pbuffer_destroy_render_buffer( render_buffer_t buffer );
nkeynes@545
    49
static gboolean glx_pbuffer_set_render_target( render_buffer_t buffer );
nkeynes@669
    50
static void glx_pbuffer_display_render_buffer( render_buffer_t buffer );
nkeynes@545
    51
static void glx_pbuffer_load_frame_buffer( frame_buffer_t frame, render_buffer_t buffer );
nkeynes@669
    52
static void glx_pbuffer_display_blank( uint32_t colour );
nkeynes@545
    53
static gboolean glx_pbuffer_read_render_buffer( unsigned char *target, render_buffer_t buffer, int rowstride, int format );
nkeynes@545
    54
nkeynes@545
    55
/**
nkeynes@545
    56
 * Test if a specific extension is supported. From opengl.org
nkeynes@545
    57
 * @param extension extension name to check for
nkeynes@545
    58
 * @return TRUE if supported, otherwise FALSE.
nkeynes@545
    59
 */
nkeynes@545
    60
gboolean isServerGLXExtensionSupported( Display *display, int screen, 
nkeynes@736
    61
                                        const char *extension )
nkeynes@545
    62
{
nkeynes@545
    63
    const char *extensions = NULL;
nkeynes@545
    64
    const char *start;
nkeynes@545
    65
    char *where, *terminator;
nkeynes@545
    66
nkeynes@545
    67
    /* Extension names should not have spaces. */
nkeynes@545
    68
    where = strchr(extension, ' ');
nkeynes@545
    69
    if (where || *extension == '\0')
nkeynes@736
    70
        return 0;
nkeynes@545
    71
    extensions = glXQueryServerString(display, screen, GLX_EXTENSIONS);
nkeynes@545
    72
    start = extensions;
nkeynes@545
    73
    for (;;) {
nkeynes@736
    74
        where = strstr((const char *) start, extension);
nkeynes@736
    75
        if (!where)
nkeynes@736
    76
            break;
nkeynes@736
    77
        terminator = where + strlen(extension);
nkeynes@736
    78
        if (where == start || *(where - 1) == ' ')
nkeynes@736
    79
            if (*terminator == ' ' || *terminator == '\0')
nkeynes@736
    80
                return TRUE;
nkeynes@736
    81
        start = terminator;
nkeynes@545
    82
    }
nkeynes@545
    83
    return FALSE;
nkeynes@545
    84
}
nkeynes@545
    85
nkeynes@545
    86
gboolean video_glx_init( Display *display, int screen )
nkeynes@545
    87
{
nkeynes@545
    88
    int major, minor;
nkeynes@545
    89
nkeynes@545
    90
    if( glx_is_initialized ) {
nkeynes@545
    91
        return TRUE;
nkeynes@545
    92
    }
nkeynes@545
    93
nkeynes@545
    94
    Bool result = glXQueryVersion( display, &major, &minor );
nkeynes@545
    95
    if( result != False ) {
nkeynes@545
    96
        glx_version = (major*100) + minor;
nkeynes@545
    97
    }
nkeynes@736
    98
nkeynes@545
    99
    glx_fbconfig_supported = (glx_version >= 103 || 
nkeynes@736
   100
            isServerGLXExtensionSupported(display, screen,
nkeynes@736
   101
                    "GLX_SGIX_fbconfig") );
nkeynes@545
   102
    glx_pbuffer_supported = (glx_version >= 103 ||
nkeynes@736
   103
            isServerGLXExtensionSupported(display, screen,
nkeynes@736
   104
                    "GLX_SGIX_pbuffer") );
nkeynes@545
   105
    if( glx_fbconfig_supported ) {
nkeynes@736
   106
        int nelem;
nkeynes@545
   107
        int fb_attribs[] = { GLX_DRAWABLE_TYPE, 
nkeynes@736
   108
                GLX_PBUFFER_BIT|GLX_WINDOW_BIT, 
nkeynes@736
   109
                GLX_RENDER_TYPE, GLX_RGBA_BIT, 
nkeynes@736
   110
                GLX_DEPTH_SIZE, 24, 0 };
nkeynes@736
   111
        GLXFBConfig *configs = glXChooseFBConfig( display, screen, 
nkeynes@736
   112
                fb_attribs, &nelem );
nkeynes@545
   113
nkeynes@736
   114
        if( configs == NULL || nelem == 0 ) {
nkeynes@736
   115
            /* Try a 16-bit depth buffer and see if it helps */
nkeynes@736
   116
            fb_attribs[5] = 16;
nkeynes@736
   117
            configs = glXChooseFBConfig( display, screen, fb_attribs, &nelem );
nkeynes@736
   118
            if( nelem > 0 ) {
nkeynes@676
   119
                WARN( "Using a 16-bit depth buffer - expect video glitches" );
nkeynes@676
   120
            }
nkeynes@676
   121
nkeynes@676
   122
        }
nkeynes@676
   123
        if( configs == NULL || nelem == 0 ) {
nkeynes@736
   124
            /* Still didn't work. Fallback to 1.2 methods */
nkeynes@736
   125
            glx_fbconfig_supported = FALSE;
nkeynes@736
   126
            glx_pbuffer_supported = FALSE;
nkeynes@736
   127
        } else {
nkeynes@736
   128
            glx_fbconfig = configs[0];
nkeynes@736
   129
            glx_visual = glXGetVisualFromFBConfig(display, glx_fbconfig);
nkeynes@736
   130
            XFree(configs);
nkeynes@736
   131
        }
nkeynes@545
   132
    }
nkeynes@545
   133
nkeynes@545
   134
    if( !glx_fbconfig_supported ) {
nkeynes@545
   135
        int attribs[] = { GLX_RGBA, GLX_DEPTH_SIZE, 24, 0 };
nkeynes@736
   136
        glx_visual = glXChooseVisual( display, screen, attribs );
nkeynes@676
   137
        if( glx_visual == NULL ) {
nkeynes@676
   138
            /* Try the 16-bit fallback here too */
nkeynes@676
   139
            attribs[2] = 16;
nkeynes@676
   140
            glx_visual = glXChooseVisual( display, screen, attribs );
nkeynes@676
   141
            if( glx_visual != NULL ) {
nkeynes@676
   142
                WARN( "Using a 16-bit depth buffer - expect video glitches" );
nkeynes@676
   143
            }
nkeynes@676
   144
        }
nkeynes@545
   145
    }
nkeynes@606
   146
nkeynes@606
   147
    if( glx_visual == NULL ) {
nkeynes@606
   148
        return FALSE;
nkeynes@606
   149
    }
nkeynes@606
   150
nkeynes@545
   151
    glx_is_initialized = TRUE;
nkeynes@545
   152
    return TRUE;
nkeynes@545
   153
}
nkeynes@545
   154
nkeynes@545
   155
gboolean video_glx_init_context( Display *display, Window window )
nkeynes@545
   156
{
nkeynes@545
   157
    if( glx_fbconfig_supported ) {
nkeynes@545
   158
        glx_context = glXCreateNewContext( display, glx_fbconfig, 
nkeynes@736
   159
                GLX_RGBA_TYPE, NULL, True );
nkeynes@736
   160
        if( glx_context == NULL ) {
nkeynes@736
   161
            ERROR( "Unable to create a GLX Context.");
nkeynes@736
   162
            return FALSE;
nkeynes@736
   163
        }
nkeynes@545
   164
nkeynes@736
   165
        if( glXMakeContextCurrent( display, window, window, 
nkeynes@736
   166
                glx_context ) == False ) {
nkeynes@736
   167
            ERROR( "Unable to prepare GLX context for drawing" );
nkeynes@736
   168
            glXDestroyContext( display, glx_context );
nkeynes@736
   169
            return FALSE;
nkeynes@736
   170
        }
nkeynes@545
   171
    } else {
nkeynes@545
   172
        glx_context = glXCreateContext( display, glx_visual, None, True );
nkeynes@736
   173
        if( glx_context == NULL ) {
nkeynes@736
   174
            ERROR( "Unable to create a GLX Context.");
nkeynes@736
   175
            return FALSE;
nkeynes@736
   176
        }
nkeynes@736
   177
nkeynes@736
   178
        if( glXMakeCurrent( display, window, glx_context ) == False ) {
nkeynes@736
   179
            ERROR( "Unable to prepare GLX context for drawing" );
nkeynes@736
   180
            glXDestroyContext( display, glx_context );
nkeynes@736
   181
            return FALSE;
nkeynes@736
   182
        }
nkeynes@545
   183
    }
nkeynes@545
   184
nkeynes@545
   185
    if( !glXIsDirect(display, glx_context) ) {
nkeynes@736
   186
        WARN( "Not using direct rendering - this is likely to be slow" );
nkeynes@545
   187
    }
nkeynes@545
   188
nkeynes@545
   189
    video_x11_display = display;
nkeynes@545
   190
    video_x11_window = window;
nkeynes@545
   191
nkeynes@545
   192
    return TRUE;
nkeynes@545
   193
}
nkeynes@545
   194
nkeynes@545
   195
gboolean video_glx_init_driver( display_driver_t driver )
nkeynes@545
   196
{
nkeynes@545
   197
    if( gl_fbo_is_supported() ) { // First preference
nkeynes@736
   198
        gl_fbo_init(driver);
nkeynes@545
   199
    } else if( glx_pbuffer_supported ) {
nkeynes@736
   200
        glx_pbuffer_init(driver);
nkeynes@545
   201
    } else {
nkeynes@545
   202
        ERROR( "Unable to create render buffers (requires either EXT_framebuffer_object or GLX 1.3+)" );
nkeynes@545
   203
        video_glx_shutdown();
nkeynes@736
   204
        return FALSE;
nkeynes@545
   205
    }
nkeynes@545
   206
    return TRUE;
nkeynes@545
   207
}
nkeynes@545
   208
nkeynes@545
   209
nkeynes@545
   210
void video_glx_shutdown()
nkeynes@545
   211
{
nkeynes@736
   212
    //    texcache_gl_shutdown();
nkeynes@545
   213
    glx_is_initialized = FALSE;
nkeynes@545
   214
    if( glx_context != NULL ) {
nkeynes@545
   215
        glXDestroyContext( video_x11_display, glx_context );
nkeynes@736
   216
        glx_context = NULL;
nkeynes@545
   217
    }
nkeynes@545
   218
    if( glx_visual != NULL ) {
nkeynes@545
   219
        XFree(glx_visual);
nkeynes@736
   220
        glx_visual = NULL;
nkeynes@545
   221
    }
nkeynes@545
   222
}
nkeynes@545
   223
nkeynes@545
   224
nkeynes@545
   225
XVisualInfo *video_glx_get_visual()
nkeynes@545
   226
{
nkeynes@545
   227
    return glx_visual;
nkeynes@545
   228
}
nkeynes@545
   229
nkeynes@545
   230
nkeynes@545
   231
int video_glx_load_font( const gchar *font_name )
nkeynes@545
   232
{
nkeynes@545
   233
    int lists;
nkeynes@545
   234
    XFontStruct *font = XLoadQueryFont(video_x11_display, font_name );
nkeynes@545
   235
    if (font == NULL)
nkeynes@736
   236
        return -1;
nkeynes@736
   237
nkeynes@545
   238
    lists = glGenLists(96);
nkeynes@545
   239
    glXUseXFont(font->fid, 32, 96, lists);
nkeynes@545
   240
    XFreeFont(video_x11_display, font);
nkeynes@545
   241
    return lists;
nkeynes@545
   242
}
nkeynes@545
   243
nkeynes@545
   244
nkeynes@545
   245
void video_glx_swap_buffers( void )
nkeynes@545
   246
{
nkeynes@545
   247
    glXSwapBuffers( video_x11_display, video_x11_window );
nkeynes@545
   248
}
nkeynes@545
   249
nkeynes@545
   250
void video_glx_make_window_current( void )
nkeynes@545
   251
{
nkeynes@545
   252
    glXMakeCurrent( video_x11_display, video_x11_window, glx_context );
nkeynes@545
   253
}
nkeynes@545
   254
nkeynes@545
   255
nkeynes@545
   256
// Pbuffer support
nkeynes@545
   257
nkeynes@545
   258
/**
nkeynes@545
   259
 * Construct the initial frame buffers and allocate ids for everything.
nkeynes@545
   260
 * The render handling driver methods are set to the fbo versions.
nkeynes@545
   261
 */
nkeynes@545
   262
static void glx_pbuffer_init( display_driver_t driver ) 
nkeynes@545
   263
{
nkeynes@545
   264
    glGenTextures( 1, &glx_pbuffer_texture );
nkeynes@545
   265
    driver->create_render_buffer = glx_pbuffer_create_render_buffer;
nkeynes@545
   266
    driver->destroy_render_buffer = glx_pbuffer_destroy_render_buffer;
nkeynes@545
   267
    driver->set_render_target = glx_pbuffer_set_render_target;
nkeynes@545
   268
    driver->display_render_buffer = glx_pbuffer_display_render_buffer;
nkeynes@545
   269
    driver->load_frame_buffer = glx_pbuffer_load_frame_buffer;
nkeynes@545
   270
    driver->display_blank = glx_pbuffer_display_blank;
nkeynes@545
   271
    driver->read_render_buffer = glx_pbuffer_read_render_buffer;
nkeynes@545
   272
}
nkeynes@545
   273
nkeynes@545
   274
void glx_pbuffer_shutdown()
nkeynes@545
   275
{
nkeynes@545
   276
    glDeleteTextures( 1, &glx_pbuffer_texture );
nkeynes@545
   277
}
nkeynes@545
   278
nkeynes@545
   279
static render_buffer_t glx_pbuffer_create_render_buffer( uint32_t width, uint32_t height )
nkeynes@545
   280
{
nkeynes@545
   281
    int attribs[] = { GLX_PBUFFER_WIDTH, width, GLX_PBUFFER_HEIGHT, height,
nkeynes@736
   282
            GLX_PRESERVED_CONTENTS, True, 0 };
nkeynes@545
   283
    GLXPbuffer pb = glXCreatePbuffer( video_x11_display, glx_fbconfig, attribs );
nkeynes@545
   284
    if( pb == (GLXPbuffer)NULL ) {
nkeynes@736
   285
        ERROR( "Unable to create pbuffer" );
nkeynes@736
   286
        return NULL;
nkeynes@545
   287
    }
nkeynes@545
   288
    render_buffer_t buffer = calloc( sizeof(struct render_buffer), 1 );
nkeynes@545
   289
    buffer->width = width;
nkeynes@545
   290
    buffer->height = height;
nkeynes@545
   291
    buffer->buf_id = pb;
nkeynes@545
   292
    return buffer;
nkeynes@545
   293
}
nkeynes@545
   294
nkeynes@545
   295
static void glx_pbuffer_destroy_render_buffer( render_buffer_t buffer )
nkeynes@545
   296
{
nkeynes@545
   297
    glXDestroyPbuffer( video_x11_display, (GLXPbuffer)buffer->buf_id );
nkeynes@545
   298
    buffer->buf_id = 0;
nkeynes@545
   299
    free( buffer );
nkeynes@545
   300
}
nkeynes@545
   301
nkeynes@545
   302
static gboolean glx_pbuffer_set_render_target( render_buffer_t buffer )
nkeynes@545
   303
{
nkeynes@545
   304
    glFinish();
nkeynes@545
   305
    if( glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context ) == False ) {
nkeynes@736
   306
        ERROR( "Make context current (pbuffer) failed!" );
nkeynes@545
   307
    }
nkeynes@545
   308
    /* setup the gl context */
nkeynes@545
   309
    glViewport( 0, 0, buffer->width, buffer->height );
nkeynes@545
   310
    glDrawBuffer(GL_FRONT);
nkeynes@736
   311
nkeynes@545
   312
    return TRUE;
nkeynes@545
   313
}
nkeynes@545
   314
nkeynes@545
   315
/**
nkeynes@545
   316
 * Render the texture holding the given buffer to the front window
nkeynes@545
   317
 * buffer.
nkeynes@545
   318
 */
nkeynes@669
   319
static void glx_pbuffer_display_render_buffer( render_buffer_t buffer )
nkeynes@545
   320
{
nkeynes@545
   321
    glFinish();
nkeynes@545
   322
    glReadBuffer( GL_FRONT );
nkeynes@545
   323
    glDrawBuffer( GL_FRONT );
nkeynes@545
   324
    glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context );
nkeynes@545
   325
    glBindTexture( GL_TEXTURE_RECTANGLE_ARB, glx_pbuffer_texture );
nkeynes@545
   326
    glCopyTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, 0, 0, buffer->width, buffer->height, 0 );
nkeynes@545
   327
    video_glx_make_window_current();
nkeynes@545
   328
    gl_texture_window( buffer->width, buffer->height, glx_pbuffer_texture, buffer->inverted );
nkeynes@545
   329
}
nkeynes@545
   330
nkeynes@545
   331
static void glx_pbuffer_load_frame_buffer( frame_buffer_t frame, render_buffer_t buffer )
nkeynes@545
   332
{
nkeynes@545
   333
    glFinish();
nkeynes@545
   334
    glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context );
nkeynes@545
   335
    GLenum type = colour_formats[frame->colour_format].type;
nkeynes@545
   336
    GLenum format = colour_formats[frame->colour_format].format;
nkeynes@545
   337
    int bpp = colour_formats[frame->colour_format].bpp;
nkeynes@545
   338
    int rowstride = (frame->rowstride / bpp) - frame->width;
nkeynes@736
   339
nkeynes@545
   340
    gl_reset_state();
nkeynes@545
   341
    glPixelStorei( GL_UNPACK_ROW_LENGTH, rowstride );
nkeynes@545
   342
    glRasterPos2f(0.375, frame->height-0.375);
nkeynes@545
   343
    glPixelZoom( 1.0, 1.0 );
nkeynes@545
   344
    glDrawPixels( frame->width, frame->height, format, type, frame->data );
nkeynes@545
   345
    glFlush();
nkeynes@545
   346
}
nkeynes@545
   347
nkeynes@669
   348
static void glx_pbuffer_display_blank( uint32_t colour )
nkeynes@545
   349
{
nkeynes@545
   350
    glFinish();
nkeynes@545
   351
    video_glx_make_window_current();
nkeynes@669
   352
    gl_display_blank( colour );
nkeynes@545
   353
}
nkeynes@545
   354
nkeynes@545
   355
static gboolean glx_pbuffer_read_render_buffer( unsigned char *target, render_buffer_t buffer, 
nkeynes@736
   356
                                                int rowstride, int format )
nkeynes@545
   357
{
nkeynes@545
   358
    glXMakeCurrent( video_x11_display, (GLXDrawable)buffer->buf_id, glx_context );
nkeynes@545
   359
    glReadBuffer( GL_FRONT );
nkeynes@545
   360
    return gl_read_render_buffer( target, buffer, rowstride, format );
nkeynes@545
   361
}
nkeynes@545
   362
nkeynes@545
   363
.