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/* $Id: xmesa.h,v 1.1 2003-02-28 11:57:53 pj Exp $ */
/*
* Mesa 3-D graphics library
* Version: 4.1
*
* Copyright (C) 1999-2002 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.
*/
/*
* Mesa/X11 interface. This header file serves as the documentation for
* the Mesa/X11 interface functions.
*
* Note: this interface isn't intended for user programs. It's primarily
* just for implementing the pseudo-GLX interface.
*/
/* Sample Usage:
In addition to the usual X calls to select a visual, create a colormap
and create a window, you must do the following to use the X/Mesa interface:
1. Call XMesaCreateVisual() to make an XMesaVisual from an XVisualInfo.
2. Call XMesaCreateContext() to create an X/Mesa rendering context, given
the XMesaVisual.
3. Call XMesaCreateWindowBuffer() to create an XMesaBuffer from an X window
and XMesaVisual.
4. Call XMesaMakeCurrent() to bind the XMesaBuffer to an XMesaContext and
to make the context the current one.
5. Make gl* calls to render your graphics.
6. Use XMesaSwapBuffers() when double buffering to swap front/back buffers.
7. Before the X window is destroyed, call XMesaDestroyBuffer().
8. Before exiting, call XMesaDestroyVisual and XMesaDestroyContext.
*/
#ifndef XMESA_H
#define XMESA_H
#ifdef __VMS
#include <GL/vms_x_fix.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
#ifdef XFree86Server
#include "xmesa_xf86.h"
#else
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include "xmesa_x.h"
#endif
#include "GL/gl.h"
#ifdef AMIWIN
#include <pragmas/xlib_pragmas.h>
extern struct Library *XLibBase;
#endif
#define XMESA_MAJOR_VERSION 4
#define XMESA_MINOR_VERSION 1
/*
* Values passed to XMesaGetString:
*/
#define XMESA_VERSION 1
#define XMESA_EXTENSIONS 2
/*
* Values passed to XMesaSetFXmode:
*/
#define XMESA_FX_WINDOW 1
#define XMESA_FX_FULLSCREEN 2
typedef struct xmesa_context *XMesaContext;
typedef struct xmesa_visual *XMesaVisual;
typedef struct xmesa_buffer *XMesaBuffer;
/*
* Create a new X/Mesa visual.
* Input: display - X11 display
* visinfo - an XVisualInfo pointer
* rgb_flag - GL_TRUE = RGB mode,
* GL_FALSE = color index mode
* alpha_flag - alpha buffer requested?
* db_flag - GL_TRUE = double-buffered,
* GL_FALSE = single buffered
* stereo_flag - stereo visual?
* ximage_flag - GL_TRUE = use an XImage for back buffer,
* GL_FALSE = use an off-screen pixmap for back buffer
* depth_size - requested bits/depth values, or zero
* stencil_size - requested bits/stencil values, or zero
* accum_red_size - requested bits/red accum values, or zero
* accum_green_size - requested bits/green accum values, or zero
* accum_blue_size - requested bits/blue accum values, or zero
* accum_alpha_size - requested bits/alpha accum values, or zero
* num_samples - number of samples/pixel if multisampling, or zero
* level - visual level, usually 0
* visualCaveat - ala the GLX extension, usually GLX_NONE_EXT
* Return; a new XMesaVisual or 0 if error.
*/
extern XMesaVisual XMesaCreateVisual( XMesaDisplay *display,
XMesaVisualInfo visinfo,
GLboolean rgb_flag,
GLboolean alpha_flag,
GLboolean db_flag,
GLboolean stereo_flag,
GLboolean ximage_flag,
GLint depth_size,
GLint stencil_size,
GLint accum_red_size,
GLint accum_green_size,
GLint accum_blue_size,
GLint accum_alpha_size,
GLint num_samples,
GLint level,
GLint visualCaveat );
/*
* Destroy an XMesaVisual, but not the associated XVisualInfo.
*/
extern void XMesaDestroyVisual( XMesaVisual v );
/*
* Create a new XMesaContext for rendering into an X11 window.
*
* Input: visual - an XMesaVisual
* share_list - another XMesaContext with which to share display
* lists or NULL if no sharing is wanted.
* Return: an XMesaContext or NULL if error.
*/
extern XMesaContext XMesaCreateContext( XMesaVisual v,
XMesaContext share_list );
/*
* Destroy a rendering context as returned by XMesaCreateContext()
*/
extern void XMesaDestroyContext( XMesaContext c );
/*
* Create an XMesaBuffer from an X window.
*/
extern XMesaBuffer XMesaCreateWindowBuffer( XMesaVisual v, XMesaWindow w );
/*
* Create an XMesaBuffer from an X pixmap.
*/
extern XMesaBuffer XMesaCreatePixmapBuffer( XMesaVisual v,
XMesaPixmap p,
XMesaColormap cmap );
/*
* Destroy an XMesaBuffer, but not the corresponding window or pixmap.
*/
extern void XMesaDestroyBuffer( XMesaBuffer b );
/*
* Return the XMesaBuffer handle which corresponds to an X drawable, if any.
*
* New in Mesa 2.3.
*/
extern XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy,
XMesaDrawable d );
/*
* Bind a buffer to a context and make the context the current one.
*/
extern GLboolean XMesaMakeCurrent( XMesaContext c,
XMesaBuffer b );
/*
* Bind two buffers (read and draw) to a context and make the
* context the current one.
* New in Mesa 3.3
*/
extern GLboolean XMesaMakeCurrent2( XMesaContext c,
XMesaBuffer drawBuffer,
XMesaBuffer readBuffer );
/*
* Unbind the current context from its buffer.
*/
extern GLboolean XMesaUnbindContext( XMesaContext c );
/*
* Return a handle to the current context.
*/
extern XMesaContext XMesaGetCurrentContext( void );
/*
* Return handle to the current (draw) buffer.
*/
extern XMesaBuffer XMesaGetCurrentBuffer( void );
/*
* Return handle to the current read buffer.
* New in Mesa 3.3
*/
extern XMesaBuffer XMesaGetCurrentReadBuffer( void );
/*
* Swap the front and back buffers for the given buffer. No action is
* taken if the buffer is not double buffered.
*/
extern void XMesaSwapBuffers( XMesaBuffer b );
/*
* Copy a sub-region of the back buffer to the front buffer.
*
* New in Mesa 2.6
*/
extern void XMesaCopySubBuffer( XMesaBuffer b,
int x,
int y,
int width,
int height );
/*
* Return a pointer to the the Pixmap or XImage being used as the back
* color buffer of an XMesaBuffer. This function is a way to get "under
* the hood" of X/Mesa so one can manipulate the back buffer directly.
* Input: b - the XMesaBuffer
* Output: pixmap - pointer to back buffer's Pixmap, or 0
* ximage - pointer to back buffer's XImage, or NULL
* Return: GL_TRUE = context is double buffered
* GL_FALSE = context is single buffered
*/
extern GLboolean XMesaGetBackBuffer( XMesaBuffer b,
XMesaPixmap *pixmap,
XMesaImage **ximage );
/*
* Return the depth buffer associated with an XMesaBuffer.
* Input: b - the XMesa buffer handle
* Output: width, height - size of buffer in pixels
* bytesPerValue - bytes per depth value (2 or 4)
* buffer - pointer to depth buffer values
* Return: GL_TRUE or GL_FALSE to indicate success or failure.
*
* New in Mesa 2.4.
*/
extern GLboolean XMesaGetDepthBuffer( XMesaBuffer b,
GLint *width,
GLint *height,
GLint *bytesPerValue,
void **buffer );
/*
* Flush/sync a context
*/
extern void XMesaFlush( XMesaContext c );
/*
* Get an X/Mesa-specific string.
* Input: name - either XMESA_VERSION or XMESA_EXTENSIONS
*/
extern const char *XMesaGetString( XMesaContext c, int name );
/*
* Scan for XMesaBuffers whose window/pixmap has been destroyed, then free
* any memory used by that buffer.
*
* New in Mesa 2.3.
*/
extern void XMesaGarbageCollect( void );
/*
* Return a dithered pixel value.
* Input: c - XMesaContext
* x, y - window coordinate
* red, green, blue, alpha - color components in [0,1]
* Return: pixel value
*
* New in Mesa 2.3.
*/
extern unsigned long XMesaDitherColor( XMesaContext xmesa,
GLint x,
GLint y,
GLfloat red,
GLfloat green,
GLfloat blue,
GLfloat alpha );
/*
* 3Dfx Glide driver only!
* Set 3Dfx/Glide full-screen or window rendering mode.
* Input: mode - either XMESA_FX_WINDOW (window rendering mode) or
* XMESA_FX_FULLSCREEN (full-screen rendering mode)
* Return: GL_TRUE if success
* GL_FALSE if invalid mode or if not using 3Dfx driver
*
* New in Mesa 2.6.
*/
extern GLboolean XMesaSetFXmode( GLint mode );
/*
* Reallocate the back/depth/stencil/accum/etc/ buffers associated with
* buffer <b> if its size has changed.
*
* New in Mesa 4.0.2
*/
extern void XMesaResizeBuffers( XMesaBuffer b );
/*
* Create a pbuffer.
* New in Mesa 4.1
*/
extern XMesaBuffer XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap,
unsigned int width, unsigned int height);
#ifdef __cplusplus
}
#endif
#endif