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/**
* \file context.h
* Mesa context/visual/framebuffer management functions.
*
* There are three Mesa data types 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
* data types. 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 data types.
*/
/*
* Mesa 3-D graphics library
* Version: 4.1
*
* Copyright (C) 1999-2001 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 "mtypes.h"
/**********************************************************************/
/** \name Create/destroy a GLvisual. */
/*@{*/
extern GLvisual *
_mesa_create_visual( GLboolean rgbFlag,
GLboolean dbFlag,
GLboolean stereoFlag,
GLint redBits,
GLint greenBits,
GLint blueBits,
GLint alphaBits,
GLint indexBits,
GLint depthBits,
GLint stencilBits,
GLint accumRedBits,
GLint accumGreenBits,
GLint accumBlueBits,
GLint accumAlphaBits,
GLint numSamples );
extern GLboolean
_mesa_initialize_visual( GLvisual *v,
GLboolean rgbFlag,
GLboolean dbFlag,
GLboolean stereoFlag,
GLint redBits,
GLint greenBits,
GLint blueBits,
GLint alphaBits,
GLint indexBits,
GLint depthBits,
GLint stencilBits,
GLint accumRedBits,
GLint accumGreenBits,
GLint accumBlueBits,
GLint accumAlphaBits,
GLint numSamples );
extern void
_mesa_destroy_visual( GLvisual *vis );
/*@}*/
/**********************************************************************/
/** \name Create/destroy a GLframebuffer. */
/*@{*/
extern GLframebuffer *
_mesa_create_framebuffer( const GLvisual *visual,
GLboolean softwareDepth,
GLboolean softwareStencil,
GLboolean softwareAccum,
GLboolean softwareAlpha );
extern void
_mesa_initialize_framebuffer( GLframebuffer *fb,
const GLvisual *visual,
GLboolean softwareDepth,
GLboolean softwareStencil,
GLboolean softwareAccum,
GLboolean softwareAlpha );
extern void
_mesa_free_framebuffer_data( GLframebuffer *buffer );
extern void
_mesa_destroy_framebuffer( GLframebuffer *buffer );
/*@}*/
/**********************************************************************/
/** \name Create/destroy a GLcontext. */
/*@{*/
extern GLcontext *
_mesa_create_context( const GLvisual *visual,
GLcontext *share_list,
void *driver_ctx,
GLboolean direct );
extern GLboolean
_mesa_initialize_context( GLcontext *ctx,
const GLvisual *visual,
GLcontext *share_list,
void *driver_ctx,
GLboolean direct );
extern void
_mesa_free_context_data( GLcontext *ctx );
extern void
_mesa_destroy_context( GLcontext *ctx );
extern void
_mesa_copy_context(const GLcontext *src, GLcontext *dst, GLuint mask);
extern void
_mesa_make_current( GLcontext *ctx, GLframebuffer *buffer );
extern void
_mesa_make_current2( GLcontext *ctx, GLframebuffer *drawBuffer,
GLframebuffer *readBuffer );
extern GLcontext *
_mesa_get_current_context(void);
/*@}*/
/**
* Macro for declaration and fetching the current context.
*
* \param C local variable which will hold the current context.
*
* It should be used in the variable declaration area of a function:
* \code
* ...
* {
* GET_CURRENT_CONTEXT(ctx);
* ...
* \endcode
*/
#ifdef THREADS
#define GET_CURRENT_CONTEXT(C) GLcontext *C = (GLcontext *) (_glapi_Context ? _glapi_Context : _glapi_get_context())
#else
#define GET_CURRENT_CONTEXT(C) GLcontext *C = (GLcontext *) _glapi_Context
#endif
/**********************************************************************/
/** \name OpenGL SI-style export functions. */
/*@{*/
extern GLboolean
_mesa_destroyContext(__GLcontext *gc);
extern GLboolean
_mesa_loseCurrent(__GLcontext *gc);
extern GLboolean
_mesa_makeCurrent(__GLcontext *gc);
extern GLboolean
_mesa_shareContext(__GLcontext *gc, __GLcontext *gcShare);
extern GLboolean
_mesa_copyContext(__GLcontext *dst, const __GLcontext *src, GLuint mask);
extern GLboolean
_mesa_forceCurrent(__GLcontext *gc);
extern GLboolean
_mesa_notifyResize(__GLcontext *gc);
extern void
_mesa_notifyDestroy(__GLcontext *gc);
extern void
_mesa_notifySwapBuffers(__GLcontext *gc);
extern struct __GLdispatchStateRec *
_mesa_dispatchExec(__GLcontext *gc);
extern void
_mesa_beginDispatchOverride(__GLcontext *gc);
extern void
_mesa_endDispatchOverride(__GLcontext *gc);
/*@}*/
extern struct _glapi_table *
_mesa_get_dispatch(GLcontext *ctx);
/**********************************************************************/
/** \name Miscellaneous */
/*@{*/
extern void
_mesa_record_error( GLcontext *ctx, GLenum error );
extern void
_mesa_Finish( void );
extern void
_mesa_Flush( void );
/*@}*/
/**********************************************************************/
/** \name Macros for contexts/flushing. */
/*@{*/
/**
* Flush vertices.
*
* \param ctx GL context.
* \param newstate new state.
*
* Checks if dd_function_table::NeedFlush is marked to flush stored vertices,
* and calls dd_function_table::FlushVertices if so. Marks
* __GLcontextRec::NewState with \p newstate.
*
* \todo Eventually let the driver specify what state changes require a flush:
*/
#define FLUSH_VERTICES(ctx, newstate) \
do { \
if (MESA_VERBOSE & VERBOSE_STATE) \
_mesa_debug(ctx, "FLUSH_VERTICES in %s\n", __FUNCTION__); \
if (ctx->Driver.NeedFlush & FLUSH_STORED_VERTICES) \
ctx->Driver.FlushVertices(ctx, FLUSH_STORED_VERTICES); \
ctx->NewState |= newstate; \
} while (0)
/**
* Flush current state.
*
* \param ctx GL context.
* \param newstate new state.
*
* Checks if dd_function_table::NeedFlush is marked to flush current state,
* and calls dd_function_table::FlushVertices if so. Marks
* __GLcontextRec::NewState with \p newstate.
*/
#define FLUSH_CURRENT(ctx, newstate) \
do { \
if (MESA_VERBOSE & VERBOSE_STATE) \
_mesa_debug(ctx, "FLUSH_CURRENT in %s\n", __FUNCTION__); \
if (ctx->Driver.NeedFlush & FLUSH_UPDATE_CURRENT) \
ctx->Driver.FlushVertices(ctx, FLUSH_UPDATE_CURRENT); \
ctx->NewState |= newstate; \
} while (0)
/**
* Macro to assert that the API call was made outside the
* glBegin()/glEnd() pair, with return value.
*
* \param ctx GL context.
* \param retval value to return value in case the assertion fails.
*/
#define ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, retval) \
do { \
if (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END) { \
_mesa_error( ctx, GL_INVALID_OPERATION, "begin/end" ); \
return retval; \
} \
} while (0)
/**
* Macro to assert that the API call was made outside the
* glBegin()/glEnd() pair.
*
* \param ctx GL context.
*/
#define ASSERT_OUTSIDE_BEGIN_END(ctx) \
do { \
if (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END) { \
_mesa_error( ctx, GL_INVALID_OPERATION, "begin/end" ); \
return; \
} \
} while (0)
/**
* Macro to assert that the API call was made outside the
* glBegin()/glEnd() pair and flush the vertices.
*
* \param ctx GL context.
*/
#define ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx) \
do { \
ASSERT_OUTSIDE_BEGIN_END(ctx); \
FLUSH_VERTICES(ctx, 0); \
} while (0)
/**
* Macro to assert that the API call was made outside the
* glBegin()/glEnd() pair and flush the vertices, with return value.
*
* \param ctx GL context.
* \param retval value to return value in case the assertion fails.
*/
#define ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH_WITH_RETVAL(ctx, retval) \
do { \
ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, retval); \
FLUSH_VERTICES(ctx, 0); \
} while (0)
/*@}*/
/**
* Macros to help evaluate current state conditions
*/
/*@{*/
/**
* Is the secondary color needed?
*/
#define NEED_SECONDARY_COLOR(CTX) \
(((CTX)->Light.Enabled && \
(CTX)->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR) \
|| (CTX)->Fog.ColorSumEnabled)
/**
* Is two-sided lighting in effect?
*/
#define NEED_TWO_SIDED_LIGHTING(CTX) \
(ctx->Light.Enabled && ctx->Light.Model.TwoSide)
/*@}*/
#endif
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