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Diffstat (limited to 'mesa/drivers/dri/common/dri_util.h')
| -rw-r--r-- | mesa/drivers/dri/common/dri_util.h | 566 |
1 files changed, 566 insertions, 0 deletions
diff --git a/mesa/drivers/dri/common/dri_util.h b/mesa/drivers/dri/common/dri_util.h new file mode 100644 index 0000000..539d28d --- /dev/null +++ b/mesa/drivers/dri/common/dri_util.h @@ -0,0 +1,566 @@ +/* $XFree86: xc/lib/GL/dri/dri_util.h,v 1.1 2002/02/22 21:32:52 dawes Exp $ */ +/** + * \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> + */ + +/* + * 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. + */ + + +#ifndef _DRI_UTIL_H_ +#define _DRI_UTIL_H_ + +#include <GL/gl.h> +#include "drm.h" +#include "drm_sarea.h" +#include "xf86drm.h" +#include "GL/internal/glcore.h" +#include "GL/internal/dri_interface.h" + +#define GLX_BAD_CONTEXT 5 + +typedef struct __DRIdisplayPrivateRec __DRIdisplayPrivate; +typedef struct __DRIscreenPrivateRec __DRIscreenPrivate; +typedef struct __DRIcontextPrivateRec __DRIcontextPrivate; +typedef struct __DRIdrawablePrivateRec __DRIdrawablePrivate; +typedef struct __DRIswapInfoRec __DRIswapInfo; +typedef struct __DRIutilversionRec2 __DRIutilversion2; + + +/** + * Used by DRI_VALIDATE_DRAWABLE_INFO + */ +#define DRI_VALIDATE_DRAWABLE_INFO_ONCE(pDrawPriv) \ + do { \ + if (*(pDrawPriv->pStamp) != pDrawPriv->lastStamp) { \ + __driUtilUpdateDrawableInfo(pDrawPriv); \ + } \ + } while (0) + + +/** + * Utility macro to validate the drawable information. + * + * See __DRIdrawablePrivate::pStamp and __DRIdrawablePrivate::lastStamp. + */ +#define DRI_VALIDATE_DRAWABLE_INFO(psp, pdp) \ +do { \ + while (*(pdp->pStamp) != pdp->lastStamp) { \ + register unsigned int hwContext = psp->pSAREA->lock.lock & \ + ~(DRM_LOCK_HELD | DRM_LOCK_CONT); \ + DRM_UNLOCK(psp->fd, &psp->pSAREA->lock, hwContext); \ + \ + DRM_SPINLOCK(&psp->pSAREA->drawable_lock, psp->drawLockID); \ + DRI_VALIDATE_DRAWABLE_INFO_ONCE(pdp); \ + DRM_SPINUNLOCK(&psp->pSAREA->drawable_lock, psp->drawLockID); \ + \ + DRM_LIGHT_LOCK(psp->fd, &psp->pSAREA->lock, hwContext); \ + } \ +} while (0) + + +/** + * 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 { + /** + * Driver initialization callback + */ + GLboolean (*InitDriver)(__DRIscreenPrivate *driScrnPriv); + + /** + * Screen destruction callback + */ + void (*DestroyScreen)(__DRIscreenPrivate *driScrnPriv); + + /** + * Context creation callback + */ + GLboolean (*CreateContext)(const __GLcontextModes *glVis, + __DRIcontextPrivate *driContextPriv, + void *sharedContextPrivate); + + /** + * Context destruction callback + */ + void (*DestroyContext)(__DRIcontextPrivate *driContextPriv); + + /** + * Buffer (drawable) creation callback + */ + GLboolean (*CreateBuffer)(__DRIscreenPrivate *driScrnPriv, + __DRIdrawablePrivate *driDrawPriv, + const __GLcontextModes *glVis, + GLboolean pixmapBuffer); + + /** + * Buffer (drawable) destruction callback + */ + void (*DestroyBuffer)(__DRIdrawablePrivate *driDrawPriv); + + /** + * Buffer swapping callback + */ + void (*SwapBuffers)(__DRIdrawablePrivate *driDrawPriv); + + /** + * Context activation callback + */ + GLboolean (*MakeCurrent)(__DRIcontextPrivate *driContextPriv, + __DRIdrawablePrivate *driDrawPriv, + __DRIdrawablePrivate *driReadPriv); + + /** + * Context unbinding callback + */ + GLboolean (*UnbindContext)(__DRIcontextPrivate *driContextPriv); + + /** + * Retrieves statistics about buffer swap operations. Required if + * GLX_OML_sync_control or GLX_MESA_swap_frame_usage is supported. + */ + int (*GetSwapInfo)( __DRIdrawablePrivate *dPriv, __DRIswapInfo * sInfo ); + + + /** + * Required if GLX_SGI_video_sync or GLX_OML_sync_control is + * supported. + */ + int (*GetMSC)( __DRIscreenPrivate * priv, int64_t * count ); + + /** + * These are required if GLX_OML_sync_control is supported. + */ + /*@{*/ + int (*WaitForMSC)( __DRIdrawablePrivate *priv, int64_t target_msc, + int64_t divisor, int64_t remainder, + int64_t * msc ); + int (*WaitForSBC)( __DRIdrawablePrivate *priv, int64_t target_sbc, + int64_t * msc, int64_t * sbc ); + + int64_t (*SwapBuffersMSC)( __DRIdrawablePrivate *priv, int64_t target_msc, + int64_t divisor, int64_t remainder ); + /*@}*/ + void (*CopySubBuffer)(__DRIdrawablePrivate *driDrawPriv, + int x, int y, int w, int h); + + /** + * See corresponding field in \c __DRIscreenRec. + */ + void (*setTexOffset)(__DRIcontext *pDRICtx, GLint texname, + unsigned long long offset, GLint depth, GLuint pitch); +}; + + +struct __DRIswapInfoRec { + /** + * Number of swapBuffers operations that have been *completed*. + */ + u_int64_t swap_count; + + /** + * Unadjusted system time of the last buffer swap. This is the time + * when the swap completed, not the time when swapBuffers was called. + */ + int64_t swap_ust; + + /** + * Number of swap operations that occurred after the swap deadline. That + * is if a swap happens more than swap_interval frames after the previous + * swap, it has missed its deadline. If swap_interval is 0, then the + * swap deadline is 1 frame after the previous swap. + */ + u_int64_t swap_missed_count; + + /** + * Amount of time used by the last swap that missed its deadline. This + * is calculated as (__glXGetUST() - swap_ust) / (swap_interval * + * time_for_single_vrefresh)). If the actual value of swap_interval is + * 0, then 1 is used instead. If swap_missed_count is non-zero, this + * should be greater-than 1.0. + */ + float swap_missed_usage; +}; + + +/** + * Per-drawable private DRI driver information. + */ +struct __DRIdrawablePrivateRec { + /** + * Kernel drawable handle + */ + drm_drawable_t hHWDrawable; + + /** + * Driver's private drawable information. + * + * This structure is opaque. + */ + void *driverPrivate; + + /** + * X's drawable ID associated with this private drawable. + */ + __DRIid draw; + __DRIdrawable *pdraw; + + /** + * 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; + + /** + * Index of this drawable information in the SAREA. + */ + unsigned int index; + + /** + * Pointer to the "drawable has changed ID" stamp in the SAREA. + */ + unsigned int *pStamp; + + /** + * Last value of the stamp. + * + * If this differs from the value stored at __DRIdrawablePrivate::pStamp, + * 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; + + /** + * \name Drawable + * + * Drawable information used in software fallbacks. + */ + /*@{*/ + int x; + int y; + int w; + int h; + int numClipRects; + drm_clip_rect_t *pClipRects; + /*@}*/ + + /** + * \name Back and depthbuffer + * + * Information about the back and depthbuffer where different from above. + */ + /*@{*/ + int backX; + int backY; + int backClipRectType; + int numBackClipRects; + drm_clip_rect_t *pBackClipRects; + /*@}*/ + + /** + * Pointer to context to which this drawable is currently bound. + */ + __DRIcontextPrivate *driContextPriv; + + /** + * Pointer to screen on which this drawable was created. + */ + __DRIscreenPrivate *driScreenPriv; + + /** + * \name Display and screen information. + * + * Basically just need these for when the locking code needs to call + * \c __driUtilUpdateDrawableInfo. + */ + /*@{*/ + __DRInativeDisplay *display; + int screen; + /*@}*/ + + /** + * Called via glXSwapBuffers(). + */ + void (*swapBuffers)( __DRIdrawablePrivate *dPriv ); +}; + +/** + * Per-context private driver information. + */ +struct __DRIcontextPrivateRec { + /** + * Kernel context handle used to access the device lock. + */ + __DRIid contextID; + + /** + * Kernel context handle used to access the device lock. + */ + drm_context_t hHWContext; + + /** + * Device driver's private context data. This structure is opaque. + */ + void *driverPrivate; + + /** + * This context's display pointer. + */ + __DRInativeDisplay *display; + + /** + * Pointer to drawable currently bound to this context for drawing. + */ + __DRIdrawablePrivate *driDrawablePriv; + + /** + * Pointer to drawable currently bound to this context for reading. + */ + __DRIdrawablePrivate *driReadablePriv; + + /** + * Pointer to screen on which this context was created. + */ + __DRIscreenPrivate *driScreenPriv; +}; + +/** + * Per-screen private driver information. + */ +struct __DRIscreenPrivateRec { + /** + * Display for this screen + */ + __DRInativeDisplay *display; + + /** + * Current screen's number + */ + int myNum; + + /** + * Callback functions into the hardware-specific DRI driver code. + */ + struct __DriverAPIRec DriverAPI; + + /** + * \name DDX version + * DDX / 2D driver version information. + * \todo Replace these fields with a \c __DRIversionRec. + */ + /*@{*/ + int ddxMajor; + int ddxMinor; + int ddxPatch; + /*@}*/ + + /** + * \name DRI version + * DRI X extension version information. + * \todo Replace these fields with a \c __DRIversionRec. + */ + /*@{*/ + int driMajor; + int driMinor; + int driPatch; + /*@}*/ + + /** + * \name DRM version + * DRM (kernel module) version information. + * \todo Replace these fields with a \c __DRIversionRec. + */ + /*@{*/ + int drmMajor; + int drmMinor; + int drmPatch; + /*@}*/ + + /** + * ID used when the client sets the drawable lock. + * + * The X server uses this value to detect if the client has died while + * holding the drawable lock. + */ + int drawLockID; + + /** + * 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; + + /** + * SAREA pointer + * + * Used to access: + * - the device lock + * - the device-independent per-drawable and per-context(?) information + */ + drm_sarea_t *pSAREA; + + /** + * \name Direct frame buffer access information + * Used for software fallbacks. + */ + /*@{*/ + unsigned char *pFB; + int fbSize; + int fbOrigin; + int fbStride; + int fbWidth; + int fbHeight; + int fbBPP; + /*@}*/ + + /** + * \name Device-dependent private information (stored in the SAREA). + * + * This data is accessed by the client driver only. + */ + /*@{*/ + void *pDevPriv; + int devPrivSize; + /*@}*/ + + /** + * Dummy context to which drawables are bound when not bound to any + * other context. + * + * A dummy hHWContext is created for this context, and is used by the GL + * core when a hardware lock is required but the drawable is not currently + * bound (e.g., potentially during a SwapBuffers request). The dummy + * context is created when the first "real" context is created on this + * screen. + */ + __DRIcontextPrivate dummyContextPriv; + + /** + * Hash table to hold the drawable information for this screen. + */ + void *drawHash; + + /** + * Device-dependent private information (not stored in the SAREA). + * + * This pointer is never touched by the DRI layer. + */ + void *private; + + /** + * GLX visuals / FBConfigs for this screen. These are stored as a + * linked list. + * + * \note + * This field is \b only used in conjunction with the old interfaces. If + * the new interfaces are used, this field will be set to \c NULL and will + * not be dereferenced. + */ + __GLcontextModes *modes; + + /** + * Pointer back to the \c __DRIscreen that contains this structure. + */ + + __DRIscreen *psc; +}; + + +/** + * Used to store a version which includes a major range instead of a single + * major version number. + */ +struct __DRIutilversionRec2 { + int major_min; /** min allowed Major version number. */ + int major_max; /** max allowed Major version number. */ + int minor; /**< Minor version number. */ + int patch; /**< Patch-level. */ +}; + + +extern void +__driUtilMessage(const char *f, ...); + + +extern void +__driUtilUpdateDrawableInfo(__DRIdrawablePrivate *pdp); + + +extern __DRIscreenPrivate * __driUtilCreateNewScreen( __DRInativeDisplay *dpy, + int scrn, __DRIscreen *psc, __GLcontextModes * modes, + const __DRIversion * ddx_version, const __DRIversion * dri_version, + const __DRIversion * drm_version, const __DRIframebuffer * frame_buffer, + drm_sarea_t *pSAREA, int fd, int internal_api_version, + const struct __DriverAPIRec *driverAPI ); + +/* Test the version of the internal GLX API. Returns a value like strcmp. */ +extern int +driCompareGLXAPIVersion( GLint required_version ); + +extern float +driCalculateSwapUsage( __DRIdrawablePrivate *dPriv, + int64_t last_swap_ust, int64_t current_ust ); + +/** + * Pointer to the \c __DRIinterfaceMethods passed to the driver by the loader. + * + * This pointer is set in the driver's \c __driCreateNewScreen function and + * is defined in dri_util.c. + */ +extern const __DRIinterfaceMethods * dri_interface; + +#endif /* _DRI_UTIL_H_ */ |