Home | History | Annotate | Download | only in main 
      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 (at) 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