src/mesa/main/context.h

   1 /* $Id: context.h,v 1.2 1999/11/11 01:22:25 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  3.3
   6  *
   7  * Copyright (C) 1999  Brian Paul   All Rights Reserved.
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13  * and/or sell copies of the Software, and to permit persons to whom the
  14  * Software is furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included
  17  * in all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  23  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  24  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26
  27
  28 #ifndef CONTEXT_H
  29 #define CONTEXT_H
  30
  31
  32 #include "types.h"
  33
  34
  35 #ifdef THREADS
  36    /*
  37     * A seperate GLcontext for each thread
  38     */
  39    extern GLcontext *gl_get_thread_context( void );
  40
  41 #define GET_IMMEDIATE struct immediate *IM = (gl_get_thread_context())->input;
  42 #define SET_IMMEDIATE(ctx, im)          \
  43 do {                                    \
  44    ctx->input = im;                     \
  45 } while (0)
  46
  47
  48 #else
  49    /*
  50     * All threads use same pointer to current context.
  51     */
  52    extern GLcontext *_mesa_current_context;
  53    extern struct immediate *CURRENT_INPUT;
  54    #define GET_CURRENT_CONTEXT(C)  GLcontext *C = _mesa_current_context
  55
  56 #define GET_IMMEDIATE struct immediate *IM = CURRENT_INPUT
  57 #define SET_IMMEDIATE(ctx, im)          \
  58 do {                                    \
  59    ctx->input = im;                     \
  60    CURRENT_INPUT = im;                  \
  61 } while (0)
  62
  63
  64 #endif
  65
  66
  67
  68 /*
  69  * There are three Mesa datatypes which are meant to be used by device
  70  * drivers:
  71  *   GLcontext:  this contains the Mesa rendering state
  72  *   GLvisual:  this describes the color buffer (rgb vs. ci), whether
  73  *              or not there's a depth buffer, stencil buffer, etc.
  74  *   GLframebuffer:  contains pointers to the depth buffer, stencil
  75  *                   buffer, accum buffer and alpha buffers.
  76  *
  77  * These types should be encapsulated by corresponding device driver
  78  * datatypes.  See xmesa.h and xmesaP.h for an example.
  79  *
  80  * In OOP terms, GLcontext, GLvisual, and GLframebuffer are base classes
  81  * which the device driver must derive from.
  82  *
  83  * The following functions create and destroy these datatypes.
  84  */
  85
  86
  87 /*
  88  * Create/destroy a GLvisual.  A GLvisual is like a GLX visual.  It describes
  89  * the colorbuffer, depth buffer, stencil buffer and accum buffer which will
  90  * be used by the GL context and framebuffer.
  91  */
  92 extern GLvisual *gl_create_visual( GLboolean rgbFlag,
  93                                    GLboolean alphaFlag,
  94                                    GLboolean dbFlag,
  95                                    GLboolean stereoFlag,
  96                                    GLint depthBits,
  97                                    GLint stencilBits,
  98                                    GLint accumBits,
  99                                    GLint indexBits,
 100                                    GLint redBits,
 101                                    GLint greenBits,
 102                                    GLint blueBits,
 103                                    GLint alphaBits );
 104
 105 extern void gl_destroy_visual( GLvisual *vis );
 106
 107
 108 /*
 109  * Create/destroy a GLcontext.  A GLcontext is like a GLX context.  It
 110  * contains the rendering state.
 111  */
 112 extern GLcontext *gl_create_context( GLvisual *visual,
 113                                      GLcontext *share_list,
 114                                      void *driver_ctx,
 115                                      GLboolean direct);
 116
 117 extern void gl_destroy_context( GLcontext *ctx );
 118
 119 /* Called by the driver after both the context and driver are fully
 120  * initialized.  Currently just reads the config file.
 121  */
 122 extern void gl_context_initialize( GLcontext *ctx );
 123
 124 /*
 125  * Create/destroy a GLframebuffer.  A GLframebuffer is like a GLX drawable.
 126  * It bundles up the depth buffer, stencil buffer and accum buffers into a
 127  * single entity.
 128  */
 129 extern GLframebuffer *gl_create_framebuffer( GLvisual *visual );
 130
 131 extern void gl_destroy_framebuffer( GLframebuffer *buffer );
 132
 133
 134
 135 extern void gl_make_current( GLcontext *ctx, GLframebuffer *buffer );
 136
 137 extern GLcontext *gl_get_current_context(void);
 138
 139 extern void gl_copy_context(const GLcontext *src, GLcontext *dst, GLuint mask);
 140
 141 extern void
 142 _mesa_swapbuffers(GLcontext *ctx);
 143
 144 extern struct _glapi_table *
 145 _mesa_get_dispatch(GLcontext *ctx);
 146
 147
 148
 149 /*
 150  * GL_MESA_resize_buffers extension
 151  */
 152 extern void _mesa_ResizeBuffersMESA( void );
 153
 154
 155
 156 /*
 157  * Miscellaneous
 158  */
 159
 160 extern void gl_problem( const GLcontext *ctx, const char *s );
 161
 162 extern void gl_warning( const GLcontext *ctx, const char *s );
 163
 164 extern void gl_error( GLcontext *ctx, GLenum error, const char *s );
 165 extern void gl_compile_error( GLcontext *ctx, GLenum error, const char *s );
 166
 167
 168 extern void gl_update_state( GLcontext *ctx );
 169
 170
 171 /* for debugging */
 172 extern void gl_print_state( const char *msg, GLuint state );
 173
 174 /* for debugging */
 175 extern void gl_print_enable_flags( const char *msg, GLuint flags );
 176
 177
 178 #ifdef PROFILE
 179 extern GLdouble gl_time( void );
 180 #endif
 181
 182
 183 #endif