src/mesa/state_tracker/st_texture.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 #ifndef ST_TEXTURE_H
  29 #define ST_TEXTURE_H
  30
  31
  32 #include "pipe/p_context.h"
  33 #include "util/u_sampler.h"
  34
  35 #include "main/mtypes.h"
  36
  37
  38 struct pipe_resource;
  39
  40
  41 /**
  42  * Subclass of gl_texure_image.
  43  */
  44 struct st_texture_image
  45 {
  46    struct gl_texture_image base;
  47
  48    /* These aren't stored in gl_texture_image
  49     */
  50    GLuint level;
  51    GLuint face;
  52
  53    /* If stImage->pt != NULL, image data is stored here.
  54     * Else if stImage->base.Data != NULL, image is stored there.
  55     * Else there is no image data.
  56     */
  57    struct pipe_resource *pt;
  58
  59    struct pipe_transfer *transfer;
  60 };
  61
  62
  63 /**
  64  * Subclass of gl_texure_object.
  65  */
  66 struct st_texture_object
  67 {
  68    struct gl_texture_object base;       /* The "parent" object */
  69
  70    /* The texture must include at levels [0..lastLevel] once validated:
  71     */
  72    GLuint lastLevel;
  73
  74    /** The size of the level=0 mipmap image */
  75    GLuint width0, height0, depth0;
  76
  77    /* On validation any active images held in main memory or in other
  78     * textures will be copied to this texture and the old storage freed.
  79     */
  80    struct pipe_resource *pt;
  81
  82    /* Default sampler view attached to this texture object. Created lazily
  83     * on first binding.
  84     */
  85    struct pipe_sampler_view *sampler_view;
  86
  87    /* True if there is/was a surface bound to this texture object.  It helps
  88     * track whether the texture object is surface based or not.
  89     */
  90    GLboolean surface_based;
  91 };
  92
  93
  94 static INLINE struct st_texture_image *
  95 st_texture_image(struct gl_texture_image *img)
  96 {
  97    return (struct st_texture_image *) img;
  98 }
  99
 100 static INLINE struct st_texture_object *
 101 st_texture_object(struct gl_texture_object *obj)
 102 {
 103    return (struct st_texture_object *) obj;
 104 }
 105
 106
 107 static INLINE struct pipe_resource *
 108 st_get_texobj_resource(struct gl_texture_object *texObj)
 109 {
 110    struct st_texture_object *stObj = st_texture_object(texObj);
 111    return stObj ? stObj->pt : NULL;
 112 }
 113
 114
 115 static INLINE struct pipe_resource *
 116 st_get_stobj_resource(struct st_texture_object *stObj)
 117 {
 118    return stObj ? stObj->pt : NULL;
 119 }
 120
 121
 122 static INLINE struct pipe_sampler_view *
 123 st_create_texture_sampler_view(struct pipe_context *pipe,
 124                                struct pipe_resource *texture)
 125 {
 126    struct pipe_sampler_view templ;
 127
 128    u_sampler_view_default_template(&templ,
 129                                    texture,
 130                                    texture->format);
 131
 132    return pipe->create_sampler_view(pipe, texture, &templ);
 133 }
 134
 135
 136 static INLINE struct pipe_sampler_view *
 137 st_get_texture_sampler_view(struct st_texture_object *stObj,
 138                             struct pipe_context *pipe)
 139
 140 {
 141    if (!stObj || !stObj->pt) {
 142       return NULL;
 143    }
 144
 145    if (!stObj->sampler_view) {
 146       stObj->sampler_view = st_create_texture_sampler_view(pipe, stObj->pt);
 147    }
 148
 149    return stObj->sampler_view;
 150 }
 151
 152
 153 extern struct pipe_resource *
 154 st_texture_create(struct st_context *st,
 155                   enum pipe_texture_target target,
 156                   enum pipe_format format,
 157                   GLuint last_level,
 158                   GLuint width0,
 159                   GLuint height0,
 160                   GLuint depth0,
 161                   GLuint tex_usage );
 162
 163
 164 /* Check if an image fits into an existing texture object.
 165  */
 166 extern GLboolean
 167 st_texture_match_image(const struct pipe_resource *pt,
 168                        const struct gl_texture_image *image,
 169                        GLuint face, GLuint level);
 170
 171 /* Return a pointer to an image within a texture.  Return image stride as
 172  * well.
 173  */
 174 extern GLubyte *
 175 st_texture_image_map(struct st_context *st,
 176                      struct st_texture_image *stImage,
 177                      GLuint zoffset,
 178                      enum pipe_transfer_usage usage,
 179                      unsigned x, unsigned y,
 180                      unsigned w, unsigned h);
 181
 182 extern void
 183 st_texture_image_unmap(struct st_context *st,
 184                        struct st_texture_image *stImage);
 185
 186
 187 /* Return pointers to each 2d slice within an image.  Indexed by depth
 188  * value.
 189  */
 190 extern const GLuint *
 191 st_texture_depth_offsets(struct pipe_resource *pt, GLuint level);
 192
 193
 194 /* Upload an image into a texture
 195  */
 196 extern void
 197 st_texture_image_data(struct st_context *st,
 198                       struct pipe_resource *dst,
 199                       GLuint face, GLuint level, void *src,
 200                       GLuint src_row_pitch, GLuint src_image_pitch);
 201
 202
 203 /* Copy an image between two textures
 204  */
 205 extern void
 206 st_texture_image_copy(struct pipe_context *pipe,
 207                       struct pipe_resource *dst, GLuint dstLevel,
 208                       struct pipe_resource *src, GLuint srcLevel,
 209                       GLuint face);
 210
 211 #endif