src/mesa/state_tracker/st_texture.h

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   3  * Copyright 2007 VMware, Inc.
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  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
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  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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  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    /** Used to store texture data that doesn't fit in the parent
  49     * object's mipmap buffer.
  50     */
  51    GLubyte *TexData;
  52
  53    /* If stImage->pt != NULL, image data is stored here.
  54     * Else if stImage->TexData != 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     * Note that the number of 1D array layers will be in height0 and the
  76     * number of 2D array layers will be in depth0, as in GL.
  77     */
  78    GLuint width0, height0, depth0;
  79
  80    /* On validation any active images held in main memory or in other
  81     * textures will be copied to this texture and the old storage freed.
  82     */
  83    struct pipe_resource *pt;
  84
  85    /* Default sampler view attached to this texture object. Created lazily
  86     * on first binding.
  87     */
  88    struct pipe_sampler_view *sampler_view;
  89
  90    /* True if this texture comes from the window system. Such a texture
  91     * cannot be reallocated and the format can only be changed with a sampler
  92     * view or a surface.
  93     */
  94    GLboolean surface_based;
  95
  96    /* If surface_based is true, this format should be used for all sampler
  97     * views and surfaces instead of pt->format.
  98     */
  99    enum pipe_format surface_format;
 100 };
 101
 102
 103 static INLINE struct st_texture_image *
 104 st_texture_image(struct gl_texture_image *img)
 105 {
 106    return (struct st_texture_image *) img;
 107 }
 108
 109 static INLINE struct st_texture_object *
 110 st_texture_object(struct gl_texture_object *obj)
 111 {
 112    return (struct st_texture_object *) obj;
 113 }
 114
 115 static INLINE const struct st_texture_object *
 116 st_texture_object_const(const struct gl_texture_object *obj)
 117 {
 118    return (const struct st_texture_object *) obj;
 119 }
 120
 121
 122 static INLINE struct pipe_resource *
 123 st_get_texobj_resource(struct gl_texture_object *texObj)
 124 {
 125    struct st_texture_object *stObj = st_texture_object(texObj);
 126    return stObj ? stObj->pt : NULL;
 127 }
 128
 129
 130 static INLINE struct pipe_resource *
 131 st_get_stobj_resource(struct st_texture_object *stObj)
 132 {
 133    return stObj ? stObj->pt : NULL;
 134 }
 135
 136
 137 static INLINE struct pipe_sampler_view *
 138 st_create_texture_sampler_view_format(struct pipe_context *pipe,
 139                                       struct pipe_resource *texture,
 140                                       enum pipe_format format)
 141 {
 142    struct pipe_sampler_view templ;
 143
 144    u_sampler_view_default_template(&templ, texture, format);
 145
 146    return pipe->create_sampler_view(pipe, texture, &templ);
 147 }
 148
 149 static INLINE struct pipe_sampler_view *
 150 st_create_texture_sampler_view(struct pipe_context *pipe,
 151                                struct pipe_resource *texture)
 152 {
 153    return st_create_texture_sampler_view_format(pipe, texture,
 154                                                 texture->format);
 155 }
 156
 157
 158
 159 extern struct pipe_resource *
 160 st_texture_create(struct st_context *st,
 161                   enum pipe_texture_target target,
 162                   enum pipe_format format,
 163                   GLuint last_level,
 164                   GLuint width0,
 165                   GLuint height0,
 166                   GLuint depth0,
 167                   GLuint layers,
 168                   GLuint nr_samples,
 169                   GLuint tex_usage );
 170
 171
 172 extern void
 173 st_gl_texture_dims_to_pipe_dims(GLenum texture,
 174                                 GLuint widthIn,
 175                                 GLuint heightIn,
 176                                 GLuint depthIn,
 177                                 GLuint *widthOut,
 178                                 GLuint *heightOut,
 179                                 GLuint *depthOut,
 180                                 GLuint *layersOut);
 181
 182 /* Check if an image fits into an existing texture object.
 183  */
 184 extern GLboolean
 185 st_texture_match_image(const struct pipe_resource *pt,
 186                        const struct gl_texture_image *image);
 187
 188 /* Return a pointer to an image within a texture.  Return image stride as
 189  * well.
 190  */
 191 extern GLubyte *
 192 st_texture_image_map(struct st_context *st, struct st_texture_image *stImage,
 193                      enum pipe_transfer_usage usage,
 194                      GLuint x, GLuint y, GLuint z,
 195                      GLuint w, GLuint h, GLuint d);
 196
 197 extern void
 198 st_texture_image_unmap(struct st_context *st,
 199                        struct st_texture_image *stImage);
 200
 201
 202 /* Return pointers to each 2d slice within an image.  Indexed by depth
 203  * value.
 204  */
 205 extern const GLuint *
 206 st_texture_depth_offsets(struct pipe_resource *pt, GLuint level);
 207
 208
 209 /* Upload an image into a texture
 210  */
 211 extern void
 212 st_texture_image_data(struct st_context *st,
 213                       struct pipe_resource *dst,
 214                       GLuint face, GLuint level, void *src,
 215                       GLuint src_row_pitch, GLuint src_image_pitch);
 216
 217
 218 /* Copy an image between two textures
 219  */
 220 extern void
 221 st_texture_image_copy(struct pipe_context *pipe,
 222                       struct pipe_resource *dst, GLuint dstLevel,
 223                       struct pipe_resource *src, GLuint srcLevel,
 224                       GLuint face);
 225
 226
 227 extern struct pipe_resource *
 228 st_create_color_map_texture(struct gl_context *ctx);
 229
 230 #endif