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/* $Id: context.h,v 1.8 1999/12/17 17:01:31 brianp Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.3
*
* Copyright (C) 1999 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef CONTEXT_H
#define CONTEXT_H
#include "glapi.h"
#include "types.h"
/*
* There are three Mesa datatypes which are meant to be used by device
* drivers:
* GLcontext: this contains the Mesa rendering state
* GLvisual: this describes the color buffer (rgb vs. ci), whether
* or not there's a depth buffer, stencil buffer, etc.
* GLframebuffer: contains pointers to the depth buffer, stencil
* buffer, accum buffer and alpha buffers.
*
* These types should be encapsulated by corresponding device driver
* datatypes. See xmesa.h and xmesaP.h for an example.
*
* In OOP terms, GLcontext, GLvisual, and GLframebuffer are base classes
* which the device driver must derive from.
*
* The following functions create and destroy these datatypes.
*/
/*
* Create/destroy a GLvisual. A GLvisual is like a GLX visual. It describes
* the colorbuffer, depth buffer, stencil buffer and accum buffer which will
* be used by the GL context and framebuffer.
*/
extern GLvisual *gl_create_visual( GLboolean rgbFlag,
GLboolean alphaFlag,
GLboolean dbFlag,
GLboolean stereoFlag,
GLint depthBits,
GLint stencilBits,
GLint accumBits,
GLint indexBits,
GLint redBits,
GLint greenBits,
GLint blueBits,
GLint alphaBits );
extern void gl_destroy_visual( GLvisual *vis );
/*
* Create/destroy a GLframebuffer. A GLframebuffer is like a GLX drawable.
* It bundles up the depth buffer, stencil buffer and accum buffers into a
* single entity.
*/
extern GLframebuffer *gl_create_framebuffer( GLvisual *visual,
GLboolean softwareDepth,
GLboolean softwareStencil,
GLboolean softwareAccum,
GLboolean softwareAlpha );
extern void gl_destroy_framebuffer( GLframebuffer *buffer );
/*
* Create/destroy a GLcontext. A GLcontext is like a GLX context. It
* contains the rendering state.
*/
extern GLcontext *gl_create_context( GLvisual *visual,
GLcontext *share_list,
void *driver_ctx,
GLboolean direct);
extern void gl_destroy_context( GLcontext *ctx );
/* Called by the driver after both the context and driver are fully
* initialized. Currently just reads the config file.
*/
extern void gl_context_initialize( GLcontext *ctx );
extern void gl_copy_context(const GLcontext *src, GLcontext *dst, GLuint mask);
extern void gl_make_current( GLcontext *ctx, GLframebuffer *buffer );
extern void gl_make_current2( GLcontext *ctx, GLframebuffer *drawBuffer,
GLframebuffer *readBuffer );
extern GLcontext *gl_get_current_context(void);
/*
* Macros for fetching current context, input buffer, etc.
*/
#ifdef THREADS
#define GET_CURRENT_CONTEXT(C) GLcontext *C = (GLcontext *) (_glapi_ThreadSafe ? _glapi_get_current_context() : _glapi_CurrentContext)
#define GET_IMMEDIATE struct immediate *IM = ((GLcontext *) (_glapi_ThreadSafe ? _glapi_get_current_context() : _glapi_CurrentContext))->input;
#define SET_IMMEDIATE(ctx, im) \
do { \
ctx->input = im; \
} while (0)
#else
extern struct immediate *CURRENT_INPUT;
#define GET_CURRENT_CONTEXT(C) GLcontext *C = _glapi_CurrentContext
#define GET_IMMEDIATE struct immediate *IM = CURRENT_INPUT
#define SET_IMMEDIATE(ctx, im) \
do { \
ctx->input = im; \
CURRENT_INPUT = im; \
} while (0)
#endif
extern void
_mesa_swapbuffers(GLcontext *ctx);
extern struct _glapi_table *
_mesa_get_dispatch(GLcontext *ctx);
/*
* GL_MESA_resize_buffers extension
*/
extern void _mesa_ResizeBuffersMESA( void );
/*
* Miscellaneous
*/
extern void gl_problem( const GLcontext *ctx, const char *s );
extern void gl_warning( const GLcontext *ctx, const char *s );
extern void gl_error( GLcontext *ctx, GLenum error, const char *s );
extern void gl_compile_error( GLcontext *ctx, GLenum error, const char *s );
extern void gl_update_state( GLcontext *ctx );
/* for debugging */
extern void gl_print_state( const char *msg, GLuint state );
/* for debugging */
extern void gl_print_enable_flags( const char *msg, GLuint flags );
#ifdef PROFILE
extern GLdouble gl_time( void );
#endif
#endif
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