/**
 * \file teximage.h
 * Texture images manipulation functions.
 */

/*
 * Mesa 3-D graphics library
 *
 * Copyright (C) 1999-2005  Brian Paul   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, sublicense,
 * 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 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 NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS 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 TEXIMAGE_H
#define TEXIMAGE_H


#include "mtypes.h"
#include "formats.h"

#ifdef __cplusplus
extern "C" {
#endif

/** Is the given value one of the 6 cube faces? */
static inline GLboolean
_mesa_is_cube_face(GLenum target)
{
   return (target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X &&
           target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z);
}


/**
 * Return number of faces for a texture target.  This will be 6 for
 * cube maps and 1 otherwise.
 * NOTE: this function is not used for cube map arrays which operate
 * more like 2D arrays than cube maps.
 */
static inline GLuint
_mesa_num_tex_faces(GLenum target)
{
   switch (target) {
   case GL_TEXTURE_CUBE_MAP:
   case GL_PROXY_TEXTURE_CUBE_MAP:
      return 6;
   default:
      return 1;
   }
}


/**
 * If the target is GL_TEXTURE_CUBE_MAP, return one of the
 * GL_TEXTURE_CUBE_MAP_POSITIVE/NEGATIVE_X/Y/Z targets corresponding to
 * the face parameter.
 * Else, return target as-is.
 */
static inline GLenum
_mesa_cube_face_target(GLenum target, unsigned face)
{
   if (target == GL_TEXTURE_CUBE_MAP) {
      assert(face < 6);
      return GL_TEXTURE_CUBE_MAP_POSITIVE_X + face;
   }
   else {
      return target;
   }
}


/**
 * For cube map faces, return a face index in [0,5].
 * For other targets return 0;
 */
static inline GLuint
_mesa_tex_target_to_face(GLenum target)
{
   if (_mesa_is_cube_face(target))
      return (GLuint) target - (GLuint) GL_TEXTURE_CUBE_MAP_POSITIVE_X;
   else
      return 0;
}


/** Are any of the dimensions of given texture equal to zero? */
static inline GLboolean
_mesa_is_zero_size_texture(const struct gl_texture_image *texImage)
{
   return (texImage->Width == 0 ||
           texImage->Height == 0 ||
           texImage->Depth == 0);
}

/** \name Internal functions */
/*@{*/

extern GLboolean
_mesa_is_proxy_texture(GLenum target);

extern bool
_mesa_is_array_texture(GLenum target);


extern void
_mesa_delete_texture_image( struct gl_context *ctx,
                            struct gl_texture_image *teximage );


extern void
_mesa_init_teximage_fields(struct gl_context *ctx,
                           struct gl_texture_image *img,
                           GLsizei width, GLsizei height, GLsizei depth,
                           GLint border, GLenum internalFormat,
                           mesa_format format);
extern void
_mesa_init_teximage_fields_ms(struct gl_context *ctx,
                              struct gl_texture_image *img,
                              GLsizei width, GLsizei height, GLsizei depth,
                              GLint border, GLenum internalFormat,
                              mesa_format format,
                              GLuint numSamples,
                              GLboolean fixedSampleLocations);

void
_mesa_update_teximage_format_swizzle(struct gl_context *ctx,
                                     struct gl_texture_image *img,
                                     GLenum depth_mode);
extern mesa_format
_mesa_choose_texture_format(struct gl_context *ctx,
                            struct gl_texture_object *texObj,
                            GLenum target, GLint level,
                            GLenum internalFormat, GLenum format, GLenum type);

extern void
_mesa_update_fbo_texture(struct gl_context *ctx,
                         struct gl_texture_object *texObj,
                         GLuint face, GLuint level);

extern void
_mesa_clear_texture_image(struct gl_context *ctx,
                          struct gl_texture_image *texImage);


extern struct gl_texture_image *
_mesa_select_tex_image(const struct gl_texture_object *texObj,
                       GLenum target, GLint level);


extern struct gl_texture_image *
_mesa_get_tex_image(struct gl_context *ctx, struct gl_texture_object *texObj,
                    GLenum target, GLint level);

mesa_format
_mesa_get_texbuffer_format(const struct gl_context *ctx, GLenum internalFormat);

/**
 * Return the base-level texture image for the given texture object.
 */
static inline struct gl_texture_image *
_mesa_base_tex_image(const struct gl_texture_object *texObj)
{
   int base_level = MIN2(texObj->Attrib.BaseLevel, MAX_TEXTURE_LEVELS - 1);
   return texObj->Image[0][base_level];
}


extern GLint
_mesa_max_texture_levels(const struct gl_context *ctx, GLenum target);


extern GLboolean
_mesa_test_proxy_teximage(struct gl_context *ctx, GLenum target,
                          GLuint numLevels, GLint level,
                          mesa_format format, GLuint numSamples,
                          GLint width, GLint height, GLint depth);

extern GLboolean
_mesa_target_can_be_compressed(const struct gl_context *ctx, GLenum target,
                               GLenum intFormat, GLenum *error);

extern GLint
_mesa_get_texture_dimensions(GLenum target);

extern GLboolean
_mesa_tex_target_is_layered(GLenum target);

extern GLuint
_mesa_get_texture_layers(const struct gl_texture_object *texObj, GLint level);

extern GLsizei
_mesa_get_tex_max_num_levels(GLenum target, GLsizei width, GLsizei height,
                             GLsizei depth);

extern GLboolean
_mesa_legal_texture_dimensions(struct gl_context *ctx, GLenum target,
                               GLint level, GLint width, GLint height,
                               GLint depth, GLint border);

extern mesa_format
_mesa_validate_texbuffer_format(const struct gl_context *ctx,
                                GLenum internalFormat);


bool
_mesa_legal_texture_base_format_for_target(struct gl_context *ctx,
                                           GLenum target,
                                           GLenum internalFormat);

bool
_mesa_format_no_online_compression(GLenum format);

GLboolean
_mesa_is_renderable_texture_format(const struct gl_context *ctx,
                                   GLenum internalformat);

extern void
_mesa_texture_sub_image(struct gl_context *ctx, GLuint dims,
                        struct gl_texture_object *texObj,
                        struct gl_texture_image *texImage,
                        GLenum target, GLint level,
                        GLint xoffset, GLint yoffset, GLint zoffset,
                        GLsizei width, GLsizei height, GLsizei depth,
                        GLenum format, GLenum type, const GLvoid *pixels,
                        bool dsa);

extern void
_mesa_texture_storage_ms_memory(struct gl_context *ctx, GLuint dims,
                                struct gl_texture_object *texObj,
                                struct gl_memory_object *memObj,
                                GLenum target, GLsizei samples,
                                GLenum internalFormat, GLsizei width,
                                GLsizei height, GLsizei depth,
                                GLboolean fixedSampleLocations,
                                GLuint64 offset, const char* func);

bool
_mesa_is_cube_map_texture(GLenum target);

GLboolean
_mesa_sparse_texture_error_check(struct gl_context *ctx, GLuint dims,
                                 struct gl_texture_object *texObj,
                                 mesa_format format, GLenum target, GLsizei levels,
                                 GLsizei width, GLsizei height, GLsizei depth,
                                 const char *func);

/*@}*/

#ifdef __cplusplus
}
#endif

#endif