src/gallium/include/pipe/p_screen.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /**
  29  * @file
  30  *
  31  * Screen, Adapter or GPU
  32  *
  33  * These are driver functions/facilities that are context independent.
  34  */
  35
  36
  37 #ifndef P_SCREEN_H
  38 #define P_SCREEN_H
  39
  40
  41 #include "pipe/p_compiler.h"
  42 #include "pipe/p_format.h"
  43 #include "pipe/p_defines.h"
  44
  45
  46
  47 #ifdef __cplusplus
  48 extern "C" {
  49 #endif
  50
  51
  52 /** Opaque type */
  53 struct pipe_fence_handle;
  54 struct pipe_winsys;
  55 struct pipe_buffer;
  56 struct pipe_texture;
  57 struct pipe_surface;
  58 struct pipe_video_surface;
  59 struct pipe_transfer;
  60
  61
  62 /**
  63  * Gallium screen/adapter context.  Basically everything
  64  * hardware-specific that doesn't actually require a rendering
  65  * context.
  66  */
  67 struct pipe_screen {
  68    struct pipe_winsys *winsys;
  69
  70    void (*destroy)( struct pipe_screen * );
  71
  72
  73    const char *(*get_name)( struct pipe_screen * );
  74
  75    const char *(*get_vendor)( struct pipe_screen * );
  76
  77    /**
  78     * Query an integer-valued capability/parameter/limit
  79     * \param param  one of PIPE_CAP_x
  80     */
  81    int (*get_param)( struct pipe_screen *, int param );
  82
  83    /**
  84     * Query a float-valued capability/parameter/limit
  85     * \param param  one of PIPE_CAP_x
  86     */
  87    float (*get_paramf)( struct pipe_screen *, int param );
  88
  89    struct pipe_context * (*context_create)( struct pipe_screen *,
  90                                             void *priv );
  91
  92    /**
  93     * Check if the given pipe_format is supported as a texture or
  94     * drawing surface.
  95     * \param tex_usage  bitmask of PIPE_TEXTURE_USAGE_*
  96     * \param geom_flags  bitmask of PIPE_TEXTURE_GEOM_*
  97     */
  98    boolean (*is_format_supported)( struct pipe_screen *,
  99                                    enum pipe_format format,
 100                                    enum pipe_texture_target target,
 101                                    unsigned tex_usage,
 102                                    unsigned geom_flags );
 103
 104    /**
 105     * Create a new texture object, using the given template info.
 106     */
 107    struct pipe_texture * (*texture_create)(struct pipe_screen *,
 108                                            const struct pipe_texture *templat);
 109
 110    /**
 111     * Create a new texture object, using the given template info, but on top of
 112     * existing memory.
 113     *
 114     * It is assumed that the buffer data is layed out according to the expected
 115     * by the hardware. NULL will be returned if any inconsistency is found.
 116     */
 117    struct pipe_texture * (*texture_blanket)(struct pipe_screen *,
 118                                             const struct pipe_texture *templat,
 119                                             const unsigned *stride,
 120                                             struct pipe_buffer *buffer);
 121
 122    void (*texture_destroy)(struct pipe_texture *pt);
 123
 124    /** Get a 2D surface which is a "view" into a texture
 125     * \param usage  bitmaks of PIPE_BUFFER_USAGE_* read/write flags
 126     */
 127    struct pipe_surface *(*get_tex_surface)(struct pipe_screen *,
 128                                            struct pipe_texture *texture,
 129                                            unsigned face, unsigned level,
 130                                            unsigned zslice,
 131                                            unsigned usage );
 132
 133    void (*tex_surface_destroy)(struct pipe_surface *);
 134
 135
 136    /** Get a transfer object for transferring data to/from a texture */
 137    struct pipe_transfer *(*get_tex_transfer)(struct pipe_screen *,
 138                                              struct pipe_texture *texture,
 139                                              unsigned face, unsigned level,
 140                                              unsigned zslice,
 141                                              enum pipe_transfer_usage usage,
 142                                              unsigned x, unsigned y,
 143                                              unsigned w, unsigned h);
 144
 145    void (*tex_transfer_destroy)(struct pipe_transfer *);
 146
 147    void *(*transfer_map)( struct pipe_screen *,
 148                           struct pipe_transfer *transfer );
 149
 150    void (*transfer_unmap)( struct pipe_screen *,
 151                            struct pipe_transfer *transfer );
 152
 153
 154    /**
 155     * Create a new buffer.
 156     * \param alignment  buffer start address alignment in bytes
 157     * \param usage  bitmask of PIPE_BUFFER_USAGE_x
 158     * \param size  size in bytes
 159     */
 160    struct pipe_buffer *(*buffer_create)( struct pipe_screen *screen,
 161                                          unsigned alignment,
 162                                          unsigned usage,
 163                                          unsigned size );
 164
 165    /**
 166     * Create a buffer that wraps user-space data.
 167     *
 168     * Effectively this schedules a delayed call to buffer_create
 169     * followed by an upload of the data at *some point in the future*,
 170     * or perhaps never.  Basically the allocate/upload is delayed
 171     * until the buffer is actually passed to hardware.
 172     *
 173     * The intention is to provide a quick way to turn regular data
 174     * into a buffer, and secondly to avoid a copy operation if that
 175     * data subsequently turns out to be only accessed by the CPU.
 176     *
 177     * Common example is OpenGL vertex buffers that are subsequently
 178     * processed either by software TNL in the driver or by passing to
 179     * hardware.
 180     *
 181     * XXX: What happens if the delayed call to buffer_create() fails?
 182     *
 183     * Note that ptr may be accessed at any time upto the time when the
 184     * buffer is destroyed, so the data must not be freed before then.
 185     */
 186    struct pipe_buffer *(*user_buffer_create)(struct pipe_screen *screen,
 187                                              void *ptr,
 188                                              unsigned bytes);
 189
 190    /**
 191     * Allocate storage for a display target surface.
 192     *
 193     * Often surfaces which are meant to be blitted to the front screen (i.e.,
 194     * display targets) must be allocated with special characteristics, memory
 195     * pools, or obtained directly from the windowing system.
 196     *
 197     * This callback is invoked by the pipe_screenwhen creating a texture marked
 198     * with the PIPE_TEXTURE_USAGE_DISPLAY_TARGET flag  to get the underlying
 199     * buffer storage.
 200     */
 201    struct pipe_buffer *(*surface_buffer_create)(struct pipe_screen *screen,
 202                                                 unsigned width, unsigned height,
 203                                                 enum pipe_format format,
 204                                                 unsigned usage,
 205                                                 unsigned tex_usage,
 206                                                 unsigned *stride);
 207
 208
 209    /**
 210     * Map the entire data store of a buffer object into the client's address.
 211     * flags is bitmask of PIPE_BUFFER_USAGE_CPU_READ/WRITE flags.
 212     */
 213    void *(*buffer_map)( struct pipe_screen *screen,
 214                         struct pipe_buffer *buf,
 215                         unsigned usage );
 216    /**
 217     * Map a subrange of the buffer data store into the client's address space.
 218     *
 219     * The returned pointer is always relative to buffer start, regardless of
 220     * the specified range. This is different from the ARB_map_buffer_range
 221     * semantics because we don't forbid multiple mappings of the same buffer
 222     * (yet).
 223     */
 224    void *(*buffer_map_range)( struct pipe_screen *screen,
 225                               struct pipe_buffer *buf,
 226                               unsigned offset,
 227                               unsigned length,
 228                               unsigned usage);
 229
 230    /**
 231     * Notify a range that was actually written into.
 232     *
 233     * Can only be used if the buffer was mapped with the
 234     * PIPE_BUFFER_USAGE_CPU_WRITE and PIPE_BUFFER_USAGE_FLUSH_EXPLICIT flags
 235     * set.
 236     *
 237     * The range is relative to the buffer start, regardless of the range
 238     * specified to buffer_map_range. This is different from the
 239     * ARB_map_buffer_range semantics because we don't forbid multiple mappings
 240     * of the same buffer (yet).
 241     *
 242     */
 243    void (*buffer_flush_mapped_range)( struct pipe_screen *screen,
 244                                       struct pipe_buffer *buf,
 245                                       unsigned offset,
 246                                       unsigned length);
 247
 248    /**
 249     * Unmap buffer.
 250     *
 251     * If the buffer was mapped with PIPE_BUFFER_USAGE_CPU_WRITE flag but not
 252     * PIPE_BUFFER_USAGE_FLUSH_EXPLICIT then the pipe driver will
 253     * assume that the whole buffer was written. This is mostly for backward
 254     * compatibility purposes and may affect performance -- the state tracker
 255     * should always specify exactly what got written while the buffer was
 256     * mapped.
 257     */
 258    void (*buffer_unmap)( struct pipe_screen *screen,
 259                          struct pipe_buffer *buf );
 260
 261    void (*buffer_destroy)( struct pipe_buffer *buf );
 262
 263    /**
 264     * Create a video surface suitable for use as a decoding target by the
 265     * driver's pipe_video_context.
 266     */
 267    struct pipe_video_surface*
 268    (*video_surface_create)( struct pipe_screen *screen,
 269                             enum pipe_video_chroma_format chroma_format,
 270                             unsigned width, unsigned height );
 271
 272    void (*video_surface_destroy)( struct pipe_video_surface *vsfc );
 273
 274    /**
 275     * Do any special operations to ensure buffer size is correct
 276     */
 277    void (*update_buffer)( struct pipe_screen *ws,
 278                           void *context_private );
 279
 280    /**
 281     * Do any special operations to ensure frontbuffer contents are
 282     * displayed, eg copy fake frontbuffer.
 283     */
 284    void (*flush_frontbuffer)( struct pipe_screen *screen,
 285                               struct pipe_surface *surf,
 286                               void *context_private );
 287
 288
 289
 290    /** Set ptr = fence, with reference counting */
 291    void (*fence_reference)( struct pipe_screen *screen,
 292                             struct pipe_fence_handle **ptr,
 293                             struct pipe_fence_handle *fence );
 294
 295    /**
 296     * Checks whether the fence has been signalled.
 297     * \param flags  driver-specific meaning
 298     * \return zero on success.
 299     */
 300    int (*fence_signalled)( struct pipe_screen *screen,
 301                            struct pipe_fence_handle *fence,
 302                            unsigned flags );
 303
 304    /**
 305     * Wait for the fence to finish.
 306     * \param flags  driver-specific meaning
 307     * \return zero on success.
 308     */
 309    int (*fence_finish)( struct pipe_screen *screen,
 310                         struct pipe_fence_handle *fence,
 311                         unsigned flags );
 312
 313 };
 314
 315
 316 #ifdef __cplusplus
 317 }
 318 #endif
 319
 320 #endif /* P_SCREEN_H */