| 1 | /* $Id: context.h,v 1.3 2000-03-02 13:27:30 sandervl Exp $ */
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| 2 |
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| 3 | /*
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| 4 | * Mesa 3-D graphics library
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| 5 | * Version: 3.1
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| 6 | *
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| 7 | * Copyright (C) 1999 Brian Paul All Rights Reserved.
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| 8 | *
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| 9 | * Permission is hereby granted, free of charge, to any person obtaining a
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| 10 | * copy of this software and associated documentation files (the "Software"),
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| 11 | * to deal in the Software without restriction, including without limitation
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| 12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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| 13 | * and/or sell copies of the Software, and to permit persons to whom the
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| 14 | * Software is furnished to do so, subject to the following conditions:
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| 15 | *
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| 16 | * The above copyright notice and this permission notice shall be included
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| 17 | * in all copies or substantial portions of the Software.
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| 18 | *
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| 19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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| 20 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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| 21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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| 22 | * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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| 23 | * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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| 24 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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| 25 | */
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| 26 |
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| 27 |
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| 28 |
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| 29 |
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| 30 |
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| 31 | #ifndef CONTEXT_H
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| 32 | #define CONTEXT_H
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| 33 |
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| 34 |
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| 35 | #include "types.h"
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| 36 |
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| 37 | #ifdef THREADS
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| 38 | /*
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| 39 | * A seperate GLcontext for each thread
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| 40 | */
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| 41 | extern GLcontext *gl_get_thread_context( void );
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| 42 | #else
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| 43 | /*
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| 44 | * All threads use same pointer to current context.
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| 45 | */
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| 46 | extern GLcontext *CC;
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| 47 | extern struct immediate *CURRENT_INPUT;
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| 48 | #endif
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| 49 |
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| 50 |
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| 51 |
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| 52 | /*
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| 53 | * There are three Mesa datatypes which are meant to be used by device
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| 54 | * drivers:
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| 55 | * GLcontext: this contains the Mesa rendering state
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| 56 | * GLvisual: this describes the color buffer (rgb vs. ci), whether
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| 57 | * or not there's a depth buffer, stencil buffer, etc.
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| 58 | * GLframebuffer: contains pointers to the depth buffer, stencil
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| 59 | * buffer, accum buffer and alpha buffers.
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| 60 | *
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| 61 | * These types should be encapsulated by corresponding device driver
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| 62 | * datatypes. See xmesa.h and xmesaP.h for an example.
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| 63 | *
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| 64 | * In OOP terms, GLcontext, GLvisual, and GLframebuffer are base classes
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| 65 | * which the device driver must derive from.
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| 66 | *
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| 67 | * The following functions create and destroy these datatypes.
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| 68 | */
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| 69 |
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| 70 |
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| 71 | /*
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| 72 | * Create/destroy a GLvisual. A GLvisual is like a GLX visual. It describes
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| 73 | * the colorbuffer, depth buffer, stencil buffer and accum buffer which will
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| 74 | * be used by the GL context and framebuffer.
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| 75 | */
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| 76 | extern GLvisual *gl_create_visual( GLboolean rgbFlag,
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| 77 | GLboolean alphaFlag,
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| 78 | GLboolean dbFlag,
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| 79 | GLboolean stereoFlag,
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| 80 | GLint depthBits,
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| 81 | GLint stencilBits,
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| 82 | GLint accumBits,
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| 83 | GLint indexBits,
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| 84 | GLint redBits,
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| 85 | GLint greenBits,
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| 86 | GLint blueBits,
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| 87 | GLint alphaBits );
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| 88 |
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| 89 | extern void gl_destroy_visual( GLvisual *vis );
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| 90 |
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| 91 |
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| 92 | /*
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| 93 | * Create/destroy a GLcontext. A GLcontext is like a GLX context. It
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| 94 | * contains the rendering state.
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| 95 | */
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| 96 | extern GLcontext *gl_create_context( GLvisual *visual,
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| 97 | GLcontext *share_list,
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| 98 | void *driver_ctx,
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| 99 | GLboolean direct);
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| 100 |
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| 101 | extern void gl_destroy_context( GLcontext *ctx );
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| 102 |
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| 103 | /* Called by the driver after both the context and driver are fully
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| 104 | * initialized. Currently just reads the config file.
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| 105 | */
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| 106 | extern void gl_context_initialize( GLcontext *ctx );
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| 107 |
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| 108 | /*
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| 109 | * Create/destroy a GLframebuffer. A GLframebuffer is like a GLX drawable.
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| 110 | * It bundles up the depth buffer, stencil buffer and accum buffers into a
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| 111 | * single entity.
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| 112 | */
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| 113 | extern GLframebuffer *gl_create_framebuffer( GLvisual *visual );
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| 114 |
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| 115 | extern void gl_destroy_framebuffer( GLframebuffer *buffer );
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| 116 |
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| 117 |
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| 118 |
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| 119 | extern void gl_make_current( GLcontext *ctx, GLframebuffer *buffer );
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| 120 |
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| 121 | extern GLcontext *gl_get_current_context(void);
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| 122 |
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| 123 | extern void gl_copy_context(const GLcontext *src, GLcontext *dst, GLuint mask);
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| 124 |
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| 125 | extern void gl_set_api_table( GLcontext *ctx, const struct gl_api_table *api );
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| 126 |
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| 127 |
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| 128 |
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| 129 | /*
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| 130 | * GL_MESA_resize_buffers extension
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| 131 | */
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| 132 | extern void gl_ResizeBuffersMESA( GLcontext *ctx );
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| 133 |
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| 134 |
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| 135 |
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| 136 | /*
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| 137 | * Miscellaneous
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| 138 | */
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| 139 |
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| 140 | extern void gl_problem( const GLcontext *ctx, const char *s );
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| 141 |
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| 142 | extern void gl_warning( const GLcontext *ctx, const char *s );
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| 143 |
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| 144 | extern void gl_error( GLcontext *ctx, GLenum error, const char *s );
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| 145 | extern void gl_compile_error( GLcontext *ctx, GLenum error, const char *s );
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| 146 |
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| 147 | extern GLenum gl_GetError( GLcontext *ctx );
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| 148 |
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| 149 |
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| 150 | extern void gl_update_state( GLcontext *ctx );
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| 151 |
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| 152 |
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| 153 | /* for debugging */
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| 154 | extern void gl_print_state( const char *msg, GLuint state );
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| 155 |
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| 156 | /* for debugging */
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| 157 | extern void gl_print_enable_flags( const char *msg, GLuint flags );
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| 158 |
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| 159 |
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| 160 | #ifdef PROFILE
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| 161 | extern GLdouble gl_time( void );
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| 162 | #endif
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| 163 |
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| 164 |
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| 165 | #endif
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