/*
 * Cogl
 *
 * A Low Level GPU Graphics and Utilities API
 *
 * Copyright (C) 2010 Intel Corporation.
 *
 * 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, sublicense, 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 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
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * 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.
 *
 *
 * Authors:
 *   Robert Bragg <robert@linux.intel.com>
 */

#ifndef __COGL_SHADER_BOILERPLATE_H
#define __COGL_SHADER_BOILERPLATE_H

#define _COGL_COMMON_SHADER_BOILERPLATE \
  "#define COGL_VERSION 100\n" \
  "\n" \
  "uniform mat4 cogl_modelview_matrix;\n" \
  "uniform mat4 cogl_modelview_projection_matrix;\n"  \
  "uniform mat4 cogl_projection_matrix;\n"

/* This declares all of the variables that we might need. This is
 * working on the assumption that the compiler will optimise them out
 * if they are not actually used. The GLSL spec at least implies that
 * this will happen for varyings but it doesn't explicitly so for
 * attributes */
#define _COGL_VERTEX_SHADER_BOILERPLATE \
  _COGL_COMMON_SHADER_BOILERPLATE \
  "#define cogl_color_out _cogl_color\n" \
  "varying vec4 _cogl_color;\n" \
  "#define cogl_tex_coord_out _cogl_tex_coord\n" \
  "#define cogl_position_out gl_Position\n" \
  "#define cogl_point_size_out gl_PointSize\n" \
  "\n" \
  "attribute vec4 cogl_color_in;\n" \
  "attribute vec4 cogl_position_in;\n" \
  "#define cogl_tex_coord_in cogl_tex_coord0_in;\n" \
  "attribute vec3 cogl_normal_in;\n"

#define _COGL_FRAGMENT_SHADER_BOILERPLATE \
  "#ifdef GL_ES\n" \
  "precision highp float;\n" \
  "#endif\n" \
  _COGL_COMMON_SHADER_BOILERPLATE \
  "\n" \
  "varying vec4 _cogl_color;\n" \
  "\n" \
  "#define cogl_color_in _cogl_color\n" \
  "#define cogl_tex_coord_in _cogl_tex_coord\n" \
  "\n" \
  "#define cogl_color_out gl_FragColor\n" \
  "#define cogl_depth_out gl_FragDepth\n" \
  "\n" \
  "#define cogl_front_facing gl_FrontFacing\n" \
  "\n" \
  "#define cogl_point_coord gl_PointCoord\n"
#if 0
  /* GLSL 1.2 has a bottom left origin, though later versions
   * allow use of an origin_upper_left keyword which would be
   * more appropriate for Cogl. */
  "#define coglFragCoord   gl_FragCoord\n"
#endif

#endif /* __COGL_SHADER_BOILERPLATE_H */