From 4c61022b4a19f020ef8f6c635ecffa54a914fd7a Mon Sep 17 00:00:00 2001 From: Marek Olšák Date: Sat, 12 Dec 2009 23:38:17 +0100 Subject: util: add a function which converts 2D coordinates to cubemap coordinates The code was taken over from u_gen_mipmap. --- src/gallium/auxiliary/util/u_texture.h | 54 ++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 src/gallium/auxiliary/util/u_texture.h (limited to 'src/gallium/auxiliary/util/u_texture.h') diff --git a/src/gallium/auxiliary/util/u_texture.h b/src/gallium/auxiliary/util/u_texture.h new file mode 100644 index 0000000000..93b2f1e4c9 --- /dev/null +++ b/src/gallium/auxiliary/util/u_texture.h @@ -0,0 +1,54 @@ +/************************************************************************** + * + * Copyright 2009 Marek Olšák + * + * 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, sub license, 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 (including the + * next paragraph) 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 NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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 U_TEXTURE_H +#define U_TEXTURE_H + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * Convert 2D texture coordinates of 4 vertices into cubemap coordinates + * in the given face. + * Coordinates must be in the range [0,1]. + * + * \param face Cubemap face. + * \param in_st 4 pairs of 2D texture coordinates to convert. + * \param in_stride Stride of in_st in floats. + * \param out_str STR cubemap texture coordinates to compute. + * \param out_stride Stride of out_str in floats. + */ +void util_map_texcoords2d_onto_cubemap(unsigned face, + const float *in_st, unsigned in_stride, + float *out_str, unsigned out_stride); + + +#ifdef __cplusplus +} +#endif + +#endif -- cgit v1.2.3