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/**************************************************************************

 *

 * Copyright 2007 VMware, Inc.

 * All Rights Reserved.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the

 * "Software"), to deal in the Software without restriction, including

 * without limitation the rights to use, copy, modify, merge, publish,

 * distribute, sub license, and/or sell copies of the Software, and to

 * permit persons to whom the Software is furnished to do so, subject to

 * the following conditions:

 *

 * The above copyright notice and this permission notice (including the

 * next paragraph) shall be included in all copies or substantial portions

 * of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.

 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR

 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,

 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE

 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

 *

 **************************************************************************/

#ifndef ST_TEXTURE_H

#define ST_TEXTURE_H

#include "pipe/p_context.h"

#include "util/u_sampler.h"

#include "main/mtypes.h"

struct pipe_resource;

struct st_texture_image_transfer {

   struct pipe_transfer *transfer;

   /* For ETC fallback. */

   GLubyte *temp_data; /**< Temporary ETC texture storage. */

   unsigned temp_stride; /**< Stride of the ETC texture storage. */

   GLubyte *map; /**< Saved map pointer of the uncompressed transfer. */

};

/**

 * Subclass of gl_texure_image.

 */

struct st_texture_image

{

   struct gl_texture_image base;

   /* If stImage->pt != NULL, image data is stored here.

    * Else there is no image data.

    */

   struct pipe_resource *pt;

   /* List of transfers, allocated on demand.

    * transfer[layer] is a mapping for that layer.

    */

   struct st_texture_image_transfer *transfer;

   unsigned num_transfers;

};

/**

 * Subclass of gl_texure_object.

 */

struct st_texture_object

{

   struct gl_texture_object base;       /* The "parent" object */

   /* The texture must include at levels [0..lastLevel] once validated:

    */

   GLuint lastLevel;

   /** The size of the level=0 mipmap image.

    * Note that the number of 1D array layers will be in height0 and the

    * number of 2D array layers will be in depth0, as in GL.

    */

   GLuint width0, height0, depth0;

   /* On validation any active images held in main memory or in other

    * textures will be copied to this texture and the old storage freed.

    */

   struct pipe_resource *pt;

   /* Number of views in sampler_views array */

   GLuint num_sampler_views;

   /* Array of sampler views (one per context) attached to this texture

    * object. Created lazily on first binding in context.

    */

   struct pipe_sampler_view **sampler_views;

   /* True if this texture comes from the window system. Such a texture

    * cannot be reallocated and the format can only be changed with a sampler

    * view or a surface.

    */

   GLboolean surface_based;

   /* If surface_based is true, this format should be used for all sampler

    * views and surfaces instead of pt->format.

    */

   enum pipe_format surface_format;

};

static inline struct st_texture_image *

st_texture_image(struct gl_texture_image *img)

{

   return (struct st_texture_image *) img;

}

static inline const struct st_texture_image *

st_texture_image_const(const struct gl_texture_image *img)

{

   return (const struct st_texture_image *) img;

}

static inline struct st_texture_object *

st_texture_object(struct gl_texture_object *obj)

{

   return (struct st_texture_object *) obj;

}

static inline const struct st_texture_object *

st_texture_object_const(const struct gl_texture_object *obj)

{

   return (const struct st_texture_object *) obj;

}

static inline struct pipe_resource *

st_get_texobj_resource(struct gl_texture_object *texObj)

{

   struct st_texture_object *stObj = st_texture_object(texObj);

   return stObj ? stObj->pt : NULL;

}

static inline struct pipe_resource *

st_get_stobj_resource(struct st_texture_object *stObj)

{

   return stObj ? stObj->pt : NULL;

}

static inline struct pipe_sampler_view *

st_create_texture_sampler_view_format(struct pipe_context *pipe,

                                      struct pipe_resource *texture,

                                      enum pipe_format format)

{

   struct pipe_sampler_view templ;

   u_sampler_view_default_template(&templ, texture, format);

   return pipe->create_sampler_view(pipe, texture, &templ);

}

static inline struct pipe_sampler_view *

st_create_texture_sampler_view(struct pipe_context *pipe,

                               struct pipe_resource *texture)

{

   return st_create_texture_sampler_view_format(pipe, texture,

                                                texture->format);

}

extern struct pipe_resource *

st_texture_create(struct st_context *st,

                  enum pipe_texture_target target,

		  enum pipe_format format,

                  GLuint last_level,

                  GLuint width0,

                  GLuint height0,

                  GLuint depth0,

                  GLuint layers,

                  GLuint nr_samples,

                  GLuint tex_usage );

extern void

st_gl_texture_dims_to_pipe_dims(GLenum texture,

                                GLuint widthIn,

                                GLuint heightIn,

                                GLuint depthIn,

                                GLuint *widthOut,

                                GLuint *heightOut,

                                GLuint *depthOut,

                                GLuint *layersOut);

/* Check if an image fits into an existing texture object.

 */

extern GLboolean

st_texture_match_image(struct st_context *st,

                       const struct pipe_resource *pt,

                       const struct gl_texture_image *image);

/* Return a pointer to an image within a texture.  Return image stride as

 * well.

 */

extern GLubyte *

st_texture_image_map(struct st_context *st, struct st_texture_image *stImage,

                     enum pipe_transfer_usage usage,

                     GLuint x, GLuint y, GLuint z,

                     GLuint w, GLuint h, GLuint d,

                     struct pipe_transfer **transfer);

extern void

st_texture_image_unmap(struct st_context *st,

                       struct st_texture_image *stImage, unsigned slice);

/* Return pointers to each 2d slice within an image.  Indexed by depth

 * value.

 */

extern const GLuint *

st_texture_depth_offsets(struct pipe_resource *pt, GLuint level);

/* Copy an image between two textures

 */

extern void

st_texture_image_copy(struct pipe_context *pipe,

                      struct pipe_resource *dst, GLuint dstLevel,

                      struct pipe_resource *src, GLuint srcLevel,

                      GLuint face);

extern struct pipe_resource *

st_create_color_map_texture(struct gl_context *ctx);

extern struct pipe_sampler_view **

st_texture_get_sampler_view(struct st_context *st,

                            struct st_texture_object *stObj);

extern void

st_texture_release_sampler_view(struct st_context *st,

                                struct st_texture_object *stObj);

extern void

st_texture_release_all_sampler_views(struct st_context *st,

                                     struct st_texture_object *stObj);

void

st_texture_free_sampler_views(struct st_texture_object *stObj);

#endif