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
  57
  58
  59 /**
  60  * Gallium screen/adapter context.  Basically everything
  61  * hardware-specific that doesn't actually require a rendering
  62  * context.
  63  */
  64 struct pipe_screen {
  65    struct pipe_winsys *winsys;
  66
  67    void (*destroy)( struct pipe_screen * );
  68
  69
  70    const char *(*get_name)( struct pipe_screen * );
  71
  72    const char *(*get_vendor)( struct pipe_screen * );
  73
  74    /**
  75     * Query an integer-valued capability/parameter/limit
  76     * \param param  one of PIPE_CAP_x
  77     */
  78    int (*get_param)( struct pipe_screen *, int param );
  79
  80    /**
  81     * Query a float-valued capability/parameter/limit
  82     * \param param  one of PIPE_CAP_x
  83     */
  84    float (*get_paramf)( struct pipe_screen *, int param );
  85
  86    /**
  87     * Check if the given pipe_format is supported as a texture or
  88     * drawing surface.
  89     * \param tex_usage  bitmask of PIPE_TEXTURE_USAGE_*
  90     * \param geom_flags  bitmask of PIPE_TEXTURE_GEOM_*
  91     */
  92    boolean (*is_format_supported)( struct pipe_screen *,
  93                                    enum pipe_format format,
  94                                    enum pipe_texture_target target,
  95                                    unsigned tex_usage,
  96                                    unsigned geom_flags );
  97
  98    /**
  99     * Create a new texture object, using the given template info.
 100     */
 101    struct pipe_texture * (*texture_create)(struct pipe_screen *,
 102                                            const struct pipe_texture *templat);
 103
 104    /**
 105     * Create a new texture object, using the given template info, but on top of
 106     * existing memory.
 107     *
 108     * It is assumed that the buffer data is layed out according to the expected
 109     * by the hardware. NULL will be returned if any inconsistency is found.
 110     */
 111    struct pipe_texture * (*texture_blanket)(struct pipe_screen *,
 112                                             const struct pipe_texture *templat,
 113                                             const unsigned *stride,
 114                                             struct pipe_buffer *buffer);
 115
 116    void (*texture_destroy)(struct pipe_texture *pt);
 117
 118    /** Get a surface which is a "view" into a texture */
 119    struct pipe_surface *(*get_tex_surface)(struct pipe_screen *,
 120                                            struct pipe_texture *texture,
 121                                            unsigned face, unsigned level,
 122                                            unsigned zslice,
 123                                            unsigned usage );
 124
 125    void (*tex_surface_destroy)(struct pipe_surface *);
 126
 127
 128    /** Get a transfer object for transferring data to/from a texture */
 129    struct pipe_transfer *(*get_tex_transfer)(struct pipe_screen *,
 130                                              struct pipe_texture *texture,
 131                                              unsigned face, unsigned level,
 132                                              unsigned zslice,
 133                                              enum pipe_transfer_usage usage,
 134                                              unsigned x, unsigned y,
 135                                              unsigned w, unsigned h);
 136
 137    void (*tex_transfer_destroy)(struct pipe_transfer *);
 138
 139    void *(*transfer_map)( struct pipe_screen *,
 140                           struct pipe_transfer *transfer );
 141
 142    void (*transfer_unmap)( struct pipe_screen *,
 143                            struct pipe_transfer *transfer );
 144
 145
 146    /**
 147     * Create a new buffer.
 148     * \param alignment  buffer start address alignment in bytes
 149     * \param usage  bitmask of PIPE_BUFFER_USAGE_x
 150     * \param size  size in bytes
 151     */
 152    struct pipe_buffer *(*buffer_create)( struct pipe_screen *screen,
 153                                          unsigned alignment,
 154                                          unsigned usage,
 155                                          unsigned size );
 156
 157    /**
 158     * Create a buffer that wraps user-space data.
 159     *
 160     * Effectively this schedules a delayed call to buffer_create
 161     * followed by an upload of the data at *some point in the future*,
 162     * or perhaps never.  Basically the allocate/upload is delayed
 163     * until the buffer is actually passed to hardware.
 164     *
 165     * The intention is to provide a quick way to turn regular data
 166     * into a buffer, and secondly to avoid a copy operation if that
 167     * data subsequently turns out to be only accessed by the CPU.
 168     *
 169     * Common example is OpenGL vertex buffers that are subsequently
 170     * processed either by software TNL in the driver or by passing to
 171     * hardware.
 172     *
 173     * XXX: What happens if the delayed call to buffer_create() fails?
 174     *
 175     * Note that ptr may be accessed at any time upto the time when the
 176     * buffer is destroyed, so the data must not be freed before then.
 177     */
 178    struct pipe_buffer *(*user_buffer_create)(struct pipe_screen *screen,
 179                                              void *ptr,
 180                                              unsigned bytes);
 181
 182    /**
 183     * Allocate storage for a display target surface.
 184     *
 185     * Often surfaces which are meant to be blitted to the front screen (i.e.,
 186     * display targets) must be allocated with special characteristics, memory
 187     * pools, or obtained directly from the windowing system.
 188     *
 189     * This callback is invoked by the pipe_screenwhen creating a texture marked
 190     * with the PIPE_TEXTURE_USAGE_DISPLAY_TARGET flag  to get the underlying
 191     * buffer storage.
 192     */
 193    struct pipe_buffer *(*surface_buffer_create)(struct pipe_screen *screen,
 194                                                 unsigned width, unsigned height,
 195                                                 enum pipe_format format,
 196                                                 unsigned usage,
 197                                                 unsigned tex_usage,
 198                                                 unsigned *stride);
 199
 200
 201    /**
 202     * Map the entire data store of a buffer object into the client's address.
 203     * flags is bitmask of PIPE_BUFFER_USAGE_CPU_READ/WRITE flags.
 204     */
 205    void *(*buffer_map)( struct pipe_screen *screen,
 206                         struct pipe_buffer *buf,
 207                         unsigned usage );
 208    /**
 209     * Map a subrange of the buffer data store into the client's address space.
 210     *
 211     * The returned pointer is always relative to buffer start, regardless of
 212     * the specified range. This is different from the ARB_map_buffer_range
 213     * semantics because we don't forbid multiple mappings of the same buffer
 214     * (yet).
 215     */
 216    void *(*buffer_map_range)( struct pipe_screen *screen,
 217                               struct pipe_buffer *buf,
 218                               unsigned offset,
 219                               unsigned length,
 220                               unsigned usage);
 221
 222    /**
 223     * Notify a range that was actually written into.
 224     *
 225     * Can only be used if the buffer was mapped with the
 226     * PIPE_BUFFER_USAGE_CPU_WRITE and PIPE_BUFFER_USAGE_FLUSH_EXPLICIT flags
 227     * set.
 228     *
 229     * The range is relative to the buffer start, regardless of the range
 230     * specified to buffer_map_range. This is different from the
 231     * ARB_map_buffer_range semantics because we don't forbid multiple mappings
 232     * of the same buffer (yet).
 233     *
 234     */
 235    void (*buffer_flush_mapped_range)( struct pipe_screen *screen,
 236                                       struct pipe_buffer *buf,
 237                                       unsigned offset,
 238                                       unsigned length);
 239
 240    /**
 241     * Unmap buffer.
 242     *
 243     * If the buffer was mapped with PIPE_BUFFER_USAGE_CPU_WRITE flag but not
 244     * PIPE_BUFFER_USAGE_FLUSH_EXPLICIT then the pipe driver will
 245     * assume that the whole buffer was written. This is mostly for backward
 246     * compatibility purposes and may affect performance -- the state tracker
 247     * should always specify exactly what got written while the buffer was
 248     * mapped.
 249     */
 250    void (*buffer_unmap)( struct pipe_screen *screen,
 251                          struct pipe_buffer *buf );
 252
 253    void (*buffer_destroy)( struct pipe_buffer *buf );
 254
 255
 256    /**
 257     * Do any special operations to ensure frontbuffer contents are
 258     * displayed, eg copy fake frontbuffer.
 259     */
 260    void (*flush_frontbuffer)( struct pipe_screen *screen,
 261                               struct pipe_surface *surf,
 262                               void *context_private );
 263
 264
 265
 266    /** Set ptr = fence, with reference counting */
 267    void (*fence_reference)( struct pipe_screen *screen,
 268                             struct pipe_fence_handle **ptr,
 269                             struct pipe_fence_handle *fence );
 270
 271    /**
 272     * Checks whether the fence has been signalled.
 273     * \param flags  driver-specific meaning
 274     * \return zero on success.
 275     */
 276    int (*fence_signalled)( struct pipe_screen *screen,
 277                            struct pipe_fence_handle *fence,
 278                            unsigned flags );
 279
 280    /**
 281     * Wait for the fence to finish.
 282     * \param flags  driver-specific meaning
 283     * \return zero on success.
 284     */
 285    int (*fence_finish)( struct pipe_screen *screen,
 286                         struct pipe_fence_handle *fence,
 287                         unsigned flags );
 288
 289 };
 290
 291
 292 #ifdef __cplusplus
 293 }
 294 #endif
 295
 296 #endif /* P_SCREEN_H */