391 lines
10 KiB
C
391 lines
10 KiB
C
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/*
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* Mesa 3-D graphics library
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* Version: 4.1
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*
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* Copyright (C) 1999-2002 Brian Paul All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/*
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* Mesa/X11 interface. This header file serves as the documentation for
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* the Mesa/X11 interface functions.
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*
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* Note: this interface isn't intended for user programs. It's primarily
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* just for implementing the pseudo-GLX interface.
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*/
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/* Sample Usage:
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In addition to the usual X calls to select a visual, create a colormap
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and create a window, you must do the following to use the X/Mesa interface:
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1. Call XMesaCreateVisual() to make an XMesaVisual from an XVisualInfo.
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2. Call XMesaCreateContext() to create an X/Mesa rendering context, given
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the XMesaVisual.
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3. Call XMesaCreateWindowBuffer() to create an XMesaBuffer from an X window
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and XMesaVisual.
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4. Call XMesaMakeCurrent() to bind the XMesaBuffer to an XMesaContext and
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to make the context the current one.
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5. Make gl* calls to render your graphics.
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6. Use XMesaSwapBuffers() when double buffering to swap front/back buffers.
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7. Before the X window is destroyed, call XMesaDestroyBuffer().
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8. Before exiting, call XMesaDestroyVisual and XMesaDestroyContext.
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*/
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#ifndef XMESA_H
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#define XMESA_H
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#ifdef __VMS
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#include <GL/vms_x_fix.h>
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef XFree86Server
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#include "xmesa_xf86.h"
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#else
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#include "xmesa_x.h"
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#endif
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#include "GL/gl.h"
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#ifdef AMIWIN
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#include <pragmas/xlib_pragmas.h>
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extern struct Library *XLibBase;
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#endif
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#define XMESA_MAJOR_VERSION 6
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#define XMESA_MINOR_VERSION 3
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/*
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* Values passed to XMesaGetString:
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*/
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#define XMESA_VERSION 1
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#define XMESA_EXTENSIONS 2
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/*
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* Values passed to XMesaSetFXmode:
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*/
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#define XMESA_FX_WINDOW 1
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#define XMESA_FX_FULLSCREEN 2
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typedef struct xmesa_context *XMesaContext;
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typedef struct xmesa_visual *XMesaVisual;
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typedef struct xmesa_buffer *XMesaBuffer;
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/*
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* Create a new X/Mesa visual.
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* Input: display - X11 display
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* visinfo - an XVisualInfo pointer
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* rgb_flag - GL_TRUE = RGB mode,
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* GL_FALSE = color index mode
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* alpha_flag - alpha buffer requested?
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* db_flag - GL_TRUE = double-buffered,
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* GL_FALSE = single buffered
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* stereo_flag - stereo visual?
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* ximage_flag - GL_TRUE = use an XImage for back buffer,
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* GL_FALSE = use an off-screen pixmap for back buffer
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* depth_size - requested bits/depth values, or zero
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* stencil_size - requested bits/stencil values, or zero
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* accum_red_size - requested bits/red accum values, or zero
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* accum_green_size - requested bits/green accum values, or zero
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* accum_blue_size - requested bits/blue accum values, or zero
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* accum_alpha_size - requested bits/alpha accum values, or zero
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* num_samples - number of samples/pixel if multisampling, or zero
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* level - visual level, usually 0
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* visualCaveat - ala the GLX extension, usually GLX_NONE_EXT
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* Return; a new XMesaVisual or 0 if error.
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*/
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extern XMesaVisual XMesaCreateVisual( XMesaDisplay *display,
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XMesaVisualInfo visinfo,
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GLboolean rgb_flag,
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GLboolean alpha_flag,
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GLboolean db_flag,
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GLboolean stereo_flag,
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GLboolean ximage_flag,
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GLint depth_size,
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GLint stencil_size,
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GLint accum_red_size,
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GLint accum_green_size,
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GLint accum_blue_size,
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GLint accum_alpha_size,
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GLint num_samples,
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GLint level,
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GLint visualCaveat );
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/*
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* Destroy an XMesaVisual, but not the associated XVisualInfo.
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*/
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extern void XMesaDestroyVisual( XMesaVisual v );
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/*
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* Create a new XMesaContext for rendering into an X11 window.
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*
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* Input: visual - an XMesaVisual
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* share_list - another XMesaContext with which to share display
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* lists or NULL if no sharing is wanted.
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* Return: an XMesaContext or NULL if error.
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*/
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extern XMesaContext XMesaCreateContext( XMesaVisual v,
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XMesaContext share_list );
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/*
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* Destroy a rendering context as returned by XMesaCreateContext()
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*/
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extern void XMesaDestroyContext( XMesaContext c );
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/*
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* Create an XMesaBuffer from an X window.
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*/
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extern XMesaBuffer XMesaCreateWindowBuffer( XMesaVisual v, XMesaWindow w );
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/*
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* Create an XMesaBuffer from an X pixmap.
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*/
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extern XMesaBuffer XMesaCreatePixmapBuffer( XMesaVisual v,
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XMesaPixmap p,
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XMesaColormap cmap );
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/*
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* Destroy an XMesaBuffer, but not the corresponding window or pixmap.
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*/
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extern void XMesaDestroyBuffer( XMesaBuffer b );
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/*
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* Return the XMesaBuffer handle which corresponds to an X drawable, if any.
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*
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* New in Mesa 2.3.
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*/
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extern XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy,
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XMesaDrawable d );
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/*
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* Bind a buffer to a context and make the context the current one.
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*/
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extern GLboolean XMesaMakeCurrent( XMesaContext c,
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XMesaBuffer b );
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/*
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* Bind two buffers (read and draw) to a context and make the
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* context the current one.
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* New in Mesa 3.3
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*/
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extern GLboolean XMesaMakeCurrent2( XMesaContext c,
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XMesaBuffer drawBuffer,
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XMesaBuffer readBuffer );
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/*
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* Unbind the current context from its buffer.
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*/
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extern GLboolean XMesaUnbindContext( XMesaContext c );
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/*
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* Return a handle to the current context.
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*/
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extern XMesaContext XMesaGetCurrentContext( void );
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/*
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* Return handle to the current (draw) buffer.
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*/
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extern XMesaBuffer XMesaGetCurrentBuffer( void );
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/*
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* Return handle to the current read buffer.
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* New in Mesa 3.3
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*/
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extern XMesaBuffer XMesaGetCurrentReadBuffer( void );
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/*
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* Swap the front and back buffers for the given buffer. No action is
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* taken if the buffer is not double buffered.
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*/
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extern void XMesaSwapBuffers( XMesaBuffer b );
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/*
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* Copy a sub-region of the back buffer to the front buffer.
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*
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* New in Mesa 2.6
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*/
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extern void XMesaCopySubBuffer( XMesaBuffer b,
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int x,
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int y,
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int width,
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int height );
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/*
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* Return a pointer to the the Pixmap or XImage being used as the back
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* color buffer of an XMesaBuffer. This function is a way to get "under
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* the hood" of X/Mesa so one can manipulate the back buffer directly.
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* Input: b - the XMesaBuffer
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* Output: pixmap - pointer to back buffer's Pixmap, or 0
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* ximage - pointer to back buffer's XImage, or NULL
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* Return: GL_TRUE = context is double buffered
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* GL_FALSE = context is single buffered
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*/
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extern GLboolean XMesaGetBackBuffer( XMesaBuffer b,
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XMesaPixmap *pixmap,
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XMesaImage **ximage );
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/*
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* Return the depth buffer associated with an XMesaBuffer.
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* Input: b - the XMesa buffer handle
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* Output: width, height - size of buffer in pixels
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* bytesPerValue - bytes per depth value (2 or 4)
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* buffer - pointer to depth buffer values
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* Return: GL_TRUE or GL_FALSE to indicate success or failure.
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*
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* New in Mesa 2.4.
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*/
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extern GLboolean XMesaGetDepthBuffer( XMesaBuffer b,
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GLint *width,
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GLint *height,
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GLint *bytesPerValue,
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void **buffer );
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/*
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* Flush/sync a context
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*/
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extern void XMesaFlush( XMesaContext c );
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/*
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* Get an X/Mesa-specific string.
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* Input: name - either XMESA_VERSION or XMESA_EXTENSIONS
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*/
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extern const char *XMesaGetString( XMesaContext c, int name );
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/*
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* Scan for XMesaBuffers whose window/pixmap has been destroyed, then free
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* any memory used by that buffer.
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*
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* New in Mesa 2.3.
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*/
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extern void XMesaGarbageCollect( void );
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/*
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* Return a dithered pixel value.
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* Input: c - XMesaContext
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* x, y - window coordinate
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* red, green, blue, alpha - color components in [0,1]
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* Return: pixel value
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*
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* New in Mesa 2.3.
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*/
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extern unsigned long XMesaDitherColor( XMesaContext xmesa,
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GLint x,
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GLint y,
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GLfloat red,
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GLfloat green,
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GLfloat blue,
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GLfloat alpha );
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/*
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* 3Dfx Glide driver only!
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* Set 3Dfx/Glide full-screen or window rendering mode.
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* Input: mode - either XMESA_FX_WINDOW (window rendering mode) or
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* XMESA_FX_FULLSCREEN (full-screen rendering mode)
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* Return: GL_TRUE if success
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* GL_FALSE if invalid mode or if not using 3Dfx driver
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*
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* New in Mesa 2.6.
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*/
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extern GLboolean XMesaSetFXmode( GLint mode );
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/*
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* Reallocate the back/depth/stencil/accum/etc/ buffers associated with
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* buffer <b> if its size has changed.
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*
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* New in Mesa 4.0.2
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*/
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extern void XMesaResizeBuffers( XMesaBuffer b );
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/*
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* Create a pbuffer.
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* New in Mesa 4.1
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*/
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extern XMesaBuffer XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap,
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unsigned int width, unsigned int height);
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#ifdef __cplusplus
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}
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#endif
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#endif
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