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      1 /**************************************************************************
      2  *
      3  * Copyright 2009 Marek Olk <maraeo (at) gmail.com>
      4  *
      5  * Permission is hereby granted, free of charge, to any person obtaining a
      6  * copy of this software and associated documentation files (the
      7  * "Software"), to deal in the Software without restriction, including
      8  * without limitation the rights to use, copy, modify, merge, publish,
      9  * distribute, sub license, and/or sell copies of the Software, and to
     10  * permit persons to whom the Software is furnished to do so, subject to
     11  * the following conditions:
     12  *
     13  * The above copyright notice and this permission notice (including the
     14  * next paragraph) shall be included in all copies or substantial portions
     15  * of the Software.
     16  *
     17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
     18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
     20  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
     21  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
     22  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
     23  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     24  *
     25  **************************************************************************/
     26 
     27 #ifndef U_TEXTURE_H
     28 #define U_TEXTURE_H
     29 
     30 #ifdef __cplusplus
     31 extern "C" {
     32 #endif
     33 
     34 /**
     35  * Convert 2D texture coordinates of 4 vertices into cubemap coordinates
     36  * in the given face.
     37  * Coordinates must be in the range [0,1].
     38  *
     39  * \param face          Cubemap face.
     40  * \param in_st         4 pairs of 2D texture coordinates to convert.
     41  * \param in_stride     Stride of in_st in floats.
     42  * \param out_str       STR cubemap texture coordinates to compute.
     43  * \param out_stride    Stride of out_str in floats.
     44  */
     45 void util_map_texcoords2d_onto_cubemap(unsigned face,
     46                                        const float *in_st, unsigned in_stride,
     47                                        float *out_str, unsigned out_stride);
     48 
     49 
     50 #ifdef __cplusplus
     51 }
     52 #endif
     53 
     54 #endif
     55