/*
* Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
* 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, sub license, 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 (including the
* next paragraph) 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 NON-INFRINGEMENT.
* IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS 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.
*/
/**
* \file dri_util.h
* DRI utility functions definitions.
*
* This module acts as glue between GLX and the actual hardware driver. A DRI
* driver doesn't really \e have to use any of this - it's optional. But, some
* useful stuff is done here that otherwise would have to be duplicated in most
* drivers.
*
* Basically, these utility functions take care of some of the dirty details of
* screen initialization, context creation, context binding, DRM setup, etc.
*
* These functions are compiled into each DRI driver so libGL.so knows nothing
* about them.
*
* \sa dri_util.c.
*
* \author Kevin E. Martin <kevin@precisioninsight.com>
* \author Brian Paul <brian@precisioninsight.com>
*/
/**
* The following structs are shared between DRISW and DRI2, the DRISW structs
* are essentially base classes of the DRI2 structs. DRISW needs to compile on
* platforms without DRM, so keep the structs opaque to DRM.
*/
#ifndef _DRI_UTIL_H_
#define _DRI_UTIL_H_
#include <GL/gl.h>
#include <GL/internal/dri_interface.h>
#include "main/mtypes.h"
#include "xmlconfig.h"
/**
* Extensions.
*/
extern const __DRIcoreExtension driCoreExtension;
extern const __DRIswrastExtension driSWRastExtension;
extern const __DRIdri2Extension driDRI2Extension;
extern const __DRI2configQueryExtension dri2ConfigQueryExtension;
/**
* Driver callback functions.
*
* Each DRI driver must have one of these structures with all the pointers set
* to appropriate functions within the driver.
*
* When glXCreateContext() is called, for example, it'll call a helper function
* dri_util.c which in turn will jump through the \a CreateContext pointer in
* this structure.
*/
struct __DriverAPIRec {
const __DRIconfig **(*InitScreen) (__DRIscreen * priv);
void (*DestroyScreen)(__DRIscreen *driScrnPriv);
GLboolean (*CreateContext)(gl_api api,
const struct gl_config *glVis,
__DRIcontext *driContextPriv,
unsigned major_version,
unsigned minor_version,
uint32_t flags,
unsigned *error,
void *sharedContextPrivate);
void (*DestroyContext)(__DRIcontext *driContextPriv);
GLboolean (*CreateBuffer)(__DRIscreen *driScrnPriv,
__DRIdrawable *driDrawPriv,
const struct gl_config *glVis,
GLboolean pixmapBuffer);
void (*DestroyBuffer)(__DRIdrawable *driDrawPriv);
void (*SwapBuffers)(__DRIdrawable *driDrawPriv);
GLboolean (*MakeCurrent)(__DRIcontext *driContextPriv,
__DRIdrawable *driDrawPriv,
__DRIdrawable *driReadPriv);
GLboolean (*UnbindContext)(__DRIcontext *driContextPriv);
__DRIbuffer *(*AllocateBuffer) (__DRIscreen *screenPrivate,
unsigned int attachment,
unsigned int format,
int width, int height);
void (*ReleaseBuffer) (__DRIscreen *screenPrivate, __DRIbuffer *buffer);
};
extern const struct __DriverAPIRec driDriverAPI;
/**
* Per-screen private driver information.
*/
struct __DRIscreenRec {
/**
* Current screen's number
*/
int myNum;
/**
* File descriptor returned when the kernel device driver is opened.
*
* Used to:
* - authenticate client to kernel
* - map the frame buffer, SAREA, etc.
* - close the kernel device driver
*/
int fd;
/**
* DRM (kernel module) version information.
*/
__DRIversion drm_version;
/**
* Device-dependent private information (not stored in the SAREA).
*
* This pointer is never touched by the DRI layer.
*/
void *driverPrivate;
void *loaderPrivate;
const __DRIextension **extensions;
const __DRIswrastLoaderExtension *swrast_loader;
struct {
/* Flag to indicate that this is a DRI2 screen. Many of the above
* fields will not be valid or initializaed in that case. */
__DRIdri2LoaderExtension *loader;
__DRIimageLookupExtension *image;
__DRIuseInvalidateExtension *useInvalidate;
} dri2;
driOptionCache optionInfo;
driOptionCache optionCache;
unsigned int api_mask;
};
/**
* Per-context private driver information.
*/
struct __DRIcontextRec {
/**
* Device driver's private context data. This structure is opaque.
*/
void *driverPrivate;
/**
* The loaders's private context data. This structure is opaque.
*/
void *loaderPrivate;
/**
* Pointer to drawable currently bound to this context for drawing.
*/
__DRIdrawable *driDrawablePriv;
/**
* Pointer to drawable currently bound to this context for reading.
*/
__DRIdrawable *driReadablePriv;
/**
* Pointer to screen on which this context was created.
*/
__DRIscreen *driScreenPriv;
struct {
int draw_stamp;
int read_stamp;
} dri2;
};
/**
* Per-drawable private DRI driver information.
*/
struct __DRIdrawableRec {
/**
* Driver's private drawable information.
*
* This structure is opaque.
*/
void *driverPrivate;
/**
* Private data from the loader. We just hold on to it and pass
* it back when calling into loader provided functions.
*/
void *loaderPrivate;
/**
* Pointer to context to which this drawable is currently bound.
*/
__DRIcontext *driContextPriv;
/**
* Pointer to screen on which this drawable was created.
*/
__DRIscreen *driScreenPriv;
/**
* Reference count for number of context's currently bound to this
* drawable.
*
* Once it reaches zero, the drawable can be destroyed.
*
* \note This behavior will change with GLX 1.3.
*/
int refcount;
/**
* Last value of the stamp.
*
* If this differs from the value stored at __DRIdrawable::dri2.stamp,
* then the drawable information has been modified by the X server, and the
* drawable information (below) should be retrieved from the X server.
*/
unsigned int lastStamp;
int w, h;
/**
* Drawable timestamp. Increased when the loader calls invalidate.
*/
struct {
unsigned int stamp;
} dri2;
};
extern void
dri2InvalidateDrawable(__DRIdrawable *drawable);
extern void
driUpdateFramebufferSize(struct gl_context *ctx, const __DRIdrawable *dPriv);
#endif /* _DRI_UTIL_H_ */