Subversion Repositories Kolibri OS

Rev

Blame | Last modification | View Log | RSS feed

  1. /**
  2.  * \file texstate.h
  3.  * Texture state management.
  4.  */
  5.  
  6. /*
  7.  * Mesa 3-D graphics library
  8.  *
  9.  * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
  10.  *
  11.  * Permission is hereby granted, free of charge, to any person obtaining a
  12.  * copy of this software and associated documentation files (the "Software"),
  13.  * to deal in the Software without restriction, including without limitation
  14.  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  15.  * and/or sell copies of the Software, and to permit persons to whom the
  16.  * Software is furnished to do so, subject to the following conditions:
  17.  *
  18.  * The above copyright notice and this permission notice shall be included
  19.  * in all copies or substantial portions of the Software.
  20.  *
  21.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  22.  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  23.  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  24.  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  25.  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  26.  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  27.  * OTHER DEALINGS IN THE SOFTWARE.
  28.  */
  29.  
  30.  
  31. #ifndef TEXSTATE_H
  32. #define TEXSTATE_H
  33.  
  34.  
  35. #include "compiler.h"
  36. #include "enums.h"
  37. #include "macros.h"
  38. #include "mtypes.h"
  39.  
  40.  
  41. static inline struct gl_texture_unit *
  42. _mesa_get_tex_unit(struct gl_context *ctx, GLuint unit)
  43. {
  44.    assert(unit < ARRAY_SIZE(ctx->Texture.Unit));
  45.    return &(ctx->Texture.Unit[unit]);
  46. }
  47.  
  48. /**
  49.  * Return pointer to current texture unit.
  50.  * This the texture unit set by glActiveTexture(), not glClientActiveTexture().
  51.  */
  52. static inline struct gl_texture_unit *
  53. _mesa_get_current_tex_unit(struct gl_context *ctx)
  54. {
  55.    return _mesa_get_tex_unit(ctx, ctx->Texture.CurrentUnit);
  56. }
  57.  
  58. static inline GLuint
  59. _mesa_max_tex_unit(struct gl_context *ctx)
  60. {
  61.    /* See OpenGL spec for glActiveTexture: */
  62.    return MAX2(ctx->Const.MaxCombinedTextureImageUnits,
  63.                ctx->Const.MaxTextureCoordUnits);
  64. }
  65.  
  66. static inline struct gl_texture_unit *
  67. _mesa_get_tex_unit_err(struct gl_context *ctx, GLuint unit, const char *func)
  68. {
  69.    if (unit < _mesa_max_tex_unit(ctx))
  70.       return _mesa_get_tex_unit(ctx, unit);
  71.  
  72.    /* Note: This error is a precedent set by glBindTextures. From the GL 4.5
  73.     * specification (30.10.2014) Section 8.1 ("Texture Objects"):
  74.     *
  75.     *    "An INVALID_OPERATION error is generated if first + count is greater
  76.     *     than the number of texture image units supported by the
  77.     *     implementation."
  78.     */
  79.    _mesa_error(ctx, GL_INVALID_OPERATION, "%s(unit=%s)", func,
  80.                _mesa_lookup_enum_by_nr(GL_TEXTURE0+unit));
  81.    return NULL;
  82. }
  83.  
  84.  
  85. extern void
  86. _mesa_copy_texture_state( const struct gl_context *src, struct gl_context *dst );
  87.  
  88. extern void
  89. _mesa_print_texunit_state( struct gl_context *ctx, GLuint unit );
  90.  
  91.  
  92.  
  93. /**
  94.  * \name Called from API
  95.  */
  96. /*@{*/
  97.  
  98. extern void GLAPIENTRY
  99. _mesa_ActiveTexture( GLenum target );
  100.  
  101. extern void GLAPIENTRY
  102. _mesa_ClientActiveTexture( GLenum target );
  103.  
  104. /*@}*/
  105.  
  106.  
  107. /**
  108.  * \name Initialization, state maintenance
  109.  */
  110. /*@{*/
  111.  
  112. extern void
  113. _mesa_update_texture( struct gl_context *ctx, GLuint new_state );
  114.  
  115. extern GLboolean
  116. _mesa_init_texture( struct gl_context *ctx );
  117.  
  118. extern void
  119. _mesa_free_texture_data( struct gl_context *ctx );
  120.  
  121. extern void
  122. _mesa_update_default_objects_texture(struct gl_context *ctx);
  123.  
  124. /*@}*/
  125.  
  126. #endif
  127.