src/mesa/drivers/dri/common/dri_util.h

   1 /*
   2  * Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sub license, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial portions
  15  * of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  20  * IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
  21  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  22  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  23  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 /**
  27  * \file dri_util.h
  28  * DRI utility functions definitions.
  29  *
  30  * This module acts as glue between GLX and the actual hardware driver.  A DRI
  31  * driver doesn't really \e have to use any of this - it's optional.  But, some
  32  * useful stuff is done here that otherwise would have to be duplicated in most
  33  * drivers.
  34  *
  35  * Basically, these utility functions take care of some of the dirty details of
  36  * screen initialization, context creation, context binding, DRM setup, etc.
  37  *
  38  * These functions are compiled into each DRI driver so libGL.so knows nothing
  39  * about them.
  40  *
  41  * \sa dri_util.c.
  42  *
  43  * \author Kevin E. Martin <kevin@precisioninsight.com>
  44  * \author Brian Paul <brian@precisioninsight.com>
  45  */
  46
  47 /**
  48  * The following structs are shared between DRISW and DRI2, the DRISW structs
  49  * are essentially base classes of the DRI2 structs. DRISW needs to compile on
  50  * platforms without DRM, so keep the structs opaque to DRM.
  51  */
  52
  53 #ifndef _DRI_UTIL_H_
  54 #define _DRI_UTIL_H_
  55
  56 #include <GL/gl.h>
  57 #include <GL/internal/dri_interface.h>
  58 #include "main/mtypes.h"
  59 #include "xmlconfig.h"
  60 #include <stdbool.h>
  61
  62 /**
  63  * Extensions.
  64  */
  65 extern const __DRIcoreExtension driCoreExtension;
  66 extern const __DRIswrastExtension driSWRastExtension;
  67 extern const __DRIdri2Extension driDRI2Extension;
  68 extern const __DRI2configQueryExtension dri2ConfigQueryExtension;
  69 extern const __DRIcopySubBufferExtension driCopySubBufferExtension;
  70 /**
  71  * Driver callback functions.
  72  *
  73  * Each DRI driver must have one of these structures with all the pointers set
  74  * to appropriate functions within the driver.
  75  *
  76  * When glXCreateContext() is called, for example, it'll call a helper function
  77  * dri_util.c which in turn will jump through the \a CreateContext pointer in
  78  * this structure.
  79  */
  80 struct __DriverAPIRec {
  81     const __DRIconfig **(*InitScreen) (__DRIscreen * priv);
  82
  83     void (*DestroyScreen)(__DRIscreen *driScrnPriv);
  84
  85     GLboolean (*CreateContext)(gl_api api,
  86                                const struct gl_config *glVis,
  87                                __DRIcontext *driContextPriv,
  88                                unsigned major_version,
  89                                unsigned minor_version,
  90                                uint32_t flags,
  91                                bool notify_reset,
  92                                unsigned *error,
  93                                void *sharedContextPrivate);
  94
  95     void (*DestroyContext)(__DRIcontext *driContextPriv);
  96
  97     GLboolean (*CreateBuffer)(__DRIscreen *driScrnPriv,
  98                               __DRIdrawable *driDrawPriv,
  99                               const struct gl_config *glVis,
 100                               GLboolean pixmapBuffer);
 101
 102     void (*DestroyBuffer)(__DRIdrawable *driDrawPriv);
 103
 104     void (*SwapBuffers)(__DRIdrawable *driDrawPriv);
 105
 106     GLboolean (*MakeCurrent)(__DRIcontext *driContextPriv,
 107                              __DRIdrawable *driDrawPriv,
 108                              __DRIdrawable *driReadPriv);
 109
 110     GLboolean (*UnbindContext)(__DRIcontext *driContextPriv);
 111
 112     __DRIbuffer *(*AllocateBuffer) (__DRIscreen *screenPrivate,
 113                                     unsigned int attachment,
 114                                     unsigned int format,
 115                                     int width, int height);
 116
 117     void (*ReleaseBuffer) (__DRIscreen *screenPrivate, __DRIbuffer *buffer);
 118
 119     void (*CopySubBuffer)(__DRIdrawable *driDrawPriv, int x, int y,
 120                           int w, int h);
 121 };
 122
 123 extern const struct __DriverAPIRec driDriverAPI;
 124 extern const struct __DriverAPIRec *globalDriverAPI;
 125
 126 /**
 127  * Per-screen private driver information.
 128  */
 129 struct __DRIscreenRec {
 130     /**
 131      * Driver-specific entrypoints provided by the driver's
 132      * __DRIDriverVtableExtensionRec.
 133      */
 134     const struct __DriverAPIRec *driver;
 135
 136     /**
 137      * Current screen's number
 138      */
 139     int myNum;
 140
 141     /**
 142      * File descriptor returned when the kernel device driver is opened.
 143      *
 144      * Used to:
 145      *   - authenticate client to kernel
 146      *   - map the frame buffer, SAREA, etc.
 147      *   - close the kernel device driver
 148      */
 149     int fd;
 150
 151     /**
 152      * Device-dependent private information (not stored in the SAREA).
 153      *
 154      * This pointer is never touched by the DRI layer.
 155      */
 156     void *driverPrivate;
 157
 158     void *loaderPrivate;
 159
 160     int max_gl_core_version;
 161     int max_gl_compat_version;
 162     int max_gl_es1_version;
 163     int max_gl_es2_version;
 164
 165     const __DRIextension **extensions;
 166
 167     const __DRIswrastLoaderExtension *swrast_loader;
 168
 169     struct {
 170         /* Flag to indicate that this is a DRI2 screen.  Many of the above
 171          * fields will not be valid or initializaed in that case. */
 172         const __DRIdri2LoaderExtension *loader;
 173         const __DRIimageLookupExtension *image;
 174         const __DRIuseInvalidateExtension *useInvalidate;
 175     } dri2;
 176
 177     struct {
 178         const __DRIimageLoaderExtension *loader;
 179     } image;
 180
 181     driOptionCache optionInfo;
 182     driOptionCache optionCache;
 183
 184     unsigned int api_mask;
 185 };
 186
 187 /**
 188  * Per-context private driver information.
 189  */
 190 struct __DRIcontextRec {
 191     /**
 192      * Device driver's private context data.  This structure is opaque.
 193      */
 194     void *driverPrivate;
 195
 196     /**
 197      * The loaders's private context data.  This structure is opaque.
 198      */
 199     void *loaderPrivate;
 200
 201     /**
 202      * Pointer to drawable currently bound to this context for drawing.
 203      */
 204     __DRIdrawable *driDrawablePriv;
 205
 206     /**
 207      * Pointer to drawable currently bound to this context for reading.
 208      */
 209     __DRIdrawable *driReadablePriv;
 210
 211     /**
 212      * Pointer to screen on which this context was created.
 213      */
 214     __DRIscreen *driScreenPriv;
 215
 216     struct {
 217         int draw_stamp;
 218         int read_stamp;
 219     } dri2;
 220 };
 221
 222 /**
 223  * Per-drawable private DRI driver information.
 224  */
 225 struct __DRIdrawableRec {
 226     /**
 227      * Driver's private drawable information.
 228      *
 229      * This structure is opaque.
 230      */
 231     void *driverPrivate;
 232
 233     /**
 234      * Private data from the loader.  We just hold on to it and pass
 235      * it back when calling into loader provided functions.
 236      */
 237     void *loaderPrivate;
 238
 239     /**
 240      * Pointer to context to which this drawable is currently bound.
 241      */
 242     __DRIcontext *driContextPriv;
 243
 244     /**
 245      * Pointer to screen on which this drawable was created.
 246      */
 247     __DRIscreen *driScreenPriv;
 248
 249     /**
 250      * Reference count for number of context's currently bound to this
 251      * drawable.
 252      *
 253      * Once it reaches zero, the drawable can be destroyed.
 254      *
 255      * \note This behavior will change with GLX 1.3.
 256      */
 257     int refcount;
 258
 259     /**
 260      * Last value of the stamp.
 261      *
 262      * If this differs from the value stored at __DRIdrawable::dri2.stamp,
 263      * then the drawable information has been modified by the X server, and the
 264      * drawable information (below) should be retrieved from the X server.
 265      */
 266     unsigned int lastStamp;
 267
 268     int w, h;
 269
 270     /**
 271      * Drawable timestamp.  Increased when the loader calls invalidate.
 272      */
 273     struct {
 274         unsigned int stamp;
 275     } dri2;
 276 };
 277
 278 extern uint32_t
 279 driGLFormatToImageFormat(mesa_format format);
 280
 281 extern mesa_format
 282 driImageFormatToGLFormat(uint32_t image_format);
 283
 284 extern void
 285 dri2InvalidateDrawable(__DRIdrawable *drawable);
 286
 287 extern void
 288 driUpdateFramebufferSize(struct gl_context *ctx, const __DRIdrawable *dPriv);
 289
 290 extern void
 291 driContextSetFlags(struct gl_context *ctx, uint32_t flags);
 292
 293 extern const __DRIimageDriverExtension driImageDriverExtension;
 294
 295 #endif /* _DRI_UTIL_H_ */