1 /* 2 * Copyright 2013 Intel Corporation 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 21 * DEALINGS IN THE SOFTWARE. 22 * 23 * Authors: 24 * Francisco Jerez <currojerez@riseup.net> 25 */ 26 27 #ifndef SHADERIMAGE_H 28 #define SHADERIMAGE_H 29 30 #include "glheader.h" 31 #include "formats.h" 32 33 #ifdef __cplusplus 34 extern "C" { 35 #endif 36 37 struct gl_context; 38 39 /** 40 * Get the matching mesa_format for a shader image format GL enum. 41 */ 42 mesa_format 43 _mesa_get_shader_image_format(GLenum format); 44 45 /** 46 * Get the GL image format class for a shader image format GL enum 47 */ 48 GLenum 49 _mesa_get_image_format_class(GLenum format); 50 51 /** 52 * Return whether an image format should be supported based on the current API 53 * version of the context. 54 */ 55 bool 56 _mesa_is_shader_image_format_supported(const struct gl_context *ctx, 57 GLenum format); 58 59 /** 60 * Get a single image unit struct with the default state. 61 */ 62 struct gl_image_unit 63 _mesa_default_image_unit(struct gl_context *ctx); 64 65 /** 66 * Initialize a context's shader image units to the default state. 67 */ 68 void 69 _mesa_init_image_units(struct gl_context *ctx); 70 71 /** 72 * Return GL_TRUE if the state of the image unit passed as argument is valid 73 * and access from the shader is allowed. Otherwise loads from this unit 74 * should return zero and stores should have no effect. 75 * 76 * The result depends on context state other than the passed image unit, part 77 * of the _NEW_TEXTURE set. 78 */ 79 GLboolean 80 _mesa_is_image_unit_valid(struct gl_context *ctx, struct gl_image_unit *u); 81 82 void GLAPIENTRY 83 _mesa_BindImageTexture(GLuint unit, GLuint texture, GLint level, 84 GLboolean layered, GLint layer, GLenum access, 85 GLenum format); 86 87 void GLAPIENTRY 88 _mesa_BindImageTextures(GLuint first, GLsizei count, const GLuint *textures); 89 90 #ifdef __cplusplus 91 } 92 #endif 93 94 #endif 95