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 winsys_handle;
  54 /** Opaque type */
  55 struct pipe_fence_handle;
  56 struct pipe_winsys;
  57 struct pipe_texture;
  58 struct pipe_resource;
  59 struct pipe_surface;
  60 struct pipe_transfer;
  61
  62
  63 /**
  64  * Gallium screen/adapter context.  Basically everything
  65  * hardware-specific that doesn't actually require a rendering
  66  * context.
  67  */
  68 struct pipe_screen {
  69    struct pipe_winsys *winsys;
  70
  71    void (*destroy)( struct pipe_screen * );
  72
  73
  74    const char *(*get_name)( struct pipe_screen * );
  75
  76    const char *(*get_vendor)( struct pipe_screen * );
  77
  78    /**
  79     * Query an integer-valued capability/parameter/limit
  80     * \param param  one of PIPE_CAP_x
  81     */
  82    int (*get_param)( struct pipe_screen *, int param );
  83
  84    /**
  85     * Query a float-valued capability/parameter/limit
  86     * \param param  one of PIPE_CAP_x
  87     */
  88    float (*get_paramf)( struct pipe_screen *, int param );
  89
  90    struct pipe_context * (*context_create)( struct pipe_screen *,
  91                                             void *priv );
  92
  93    /**
  94     * Check if the given pipe_format is supported as a texture or
  95     * drawing surface.
  96     * \param bindings  bitmask of PIPE_BIND_*
  97     * \param geom_flags  bitmask of PIPE_TEXTURE_GEOM_*
  98     */
  99    boolean (*is_format_supported)( struct pipe_screen *,
 100                                    enum pipe_format format,
 101                                    enum pipe_texture_target target,
 102                                    unsigned bindings,
 103                                    unsigned geom_flags );
 104
 105    /**
 106     * Check if the given pipe_format is supported with a requested
 107     * number of samples for msaa.
 108     * \param sample_count number of samples for multisampling
 109     */
 110    boolean (*is_msaa_supported)( struct pipe_screen *,
 111                                  enum pipe_format format,
 112                                  unsigned sample_count );
 113
 114    /**
 115     * Create a new texture object, using the given template info.
 116     */
 117    struct pipe_resource * (*resource_create)(struct pipe_screen *,
 118                                              const struct pipe_resource *templat);
 119
 120    /**
 121     * Create a texture from a winsys_handle. The handle is often created in
 122     * another process by first creating a pipe texture and then calling
 123     * texture_get_handle.
 124     */
 125    struct pipe_resource * (*resource_from_handle)(struct pipe_screen *,
 126                                                   const struct pipe_resource *templat,
 127                                                   struct winsys_handle *handle);
 128
 129    /**
 130     * Get a winsys_handle from a texture. Some platforms/winsys requires
 131     * that the texture is created with a special usage flag like
 132     * DISPLAYTARGET or PRIMARY.
 133     */
 134    boolean (*resource_get_handle)(struct pipe_screen *,
 135                                   struct pipe_resource *tex,
 136                                   struct winsys_handle *handle);
 137
 138
 139    void (*resource_destroy)(struct pipe_screen *,
 140                             struct pipe_resource *pt);
 141
 142    /** Get a 2D surface which is a "view" into a texture
 143     * \param usage  bitmaks of PIPE_BIND_* flags
 144     */
 145    struct pipe_surface *(*get_tex_surface)(struct pipe_screen *,
 146                                            struct pipe_resource *resource,
 147                                            unsigned face, unsigned level,
 148                                            unsigned zslice,
 149                                            unsigned usage );
 150
 151    void (*tex_surface_destroy)(struct pipe_surface *);
 152
 153
 154
 155    /**
 156     * Create a buffer that wraps user-space data.
 157     *
 158     * Effectively this schedules a delayed call to buffer_create
 159     * followed by an upload of the data at *some point in the future*,
 160     * or perhaps never.  Basically the allocate/upload is delayed
 161     * until the buffer is actually passed to hardware.
 162     *
 163     * The intention is to provide a quick way to turn regular data
 164     * into a buffer, and secondly to avoid a copy operation if that
 165     * data subsequently turns out to be only accessed by the CPU.
 166     *
 167     * Common example is OpenGL vertex buffers that are subsequently
 168     * processed either by software TNL in the driver or by passing to
 169     * hardware.
 170     *
 171     * XXX: What happens if the delayed call to buffer_create() fails?
 172     *
 173     * Note that ptr may be accessed at any time upto the time when the
 174     * buffer is destroyed, so the data must not be freed before then.
 175     */
 176    struct pipe_resource *(*user_buffer_create)(struct pipe_screen *screen,
 177                                                void *ptr,
 178                                                unsigned bytes,
 179                                                unsigned bind_flags);
 180
 181    /**
 182     * Do any special operations to ensure frontbuffer contents are
 183     * displayed, eg copy fake frontbuffer.
 184     * \param winsys_drawable_handle  an opaque handle that the calling context
 185     *                                gets out-of-band
 186     */
 187    void (*flush_frontbuffer)( struct pipe_screen *screen,
 188                               struct pipe_surface *surf,
 189                               void *winsys_drawable_handle );
 190
 191
 192
 193    /** Set ptr = fence, with reference counting */
 194    void (*fence_reference)( struct pipe_screen *screen,
 195                             struct pipe_fence_handle **ptr,
 196                             struct pipe_fence_handle *fence );
 197
 198    /**
 199     * Checks whether the fence has been signalled.
 200     * \param flags  driver-specific meaning
 201     * \return zero on success.
 202     */
 203    int (*fence_signalled)( struct pipe_screen *screen,
 204                            struct pipe_fence_handle *fence,
 205                            unsigned flags );
 206
 207    /**
 208     * Wait for the fence to finish.
 209     * \param flags  driver-specific meaning
 210     * \return zero on success.
 211     */
 212    int (*fence_finish)( struct pipe_screen *screen,
 213                         struct pipe_fence_handle *fence,
 214                         unsigned flags );
 215
 216 };
 217
 218
 219 #ifdef __cplusplus
 220 }
 221 #endif
 222
 223 #endif /* P_SCREEN_H */