tests/shaders/glsl-vs-normalscale.c

   1 /*
   2  * Copyright © 2010 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 DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *    Eric Anholt <eric@anholt.net>
  25  *
  26  */
  27
  28 /** @file glsl-vs-normalscale.c
  29  *
  30  * Tests that gl_NormalScale provides a correct value.
  31  */
  32
  33 #include "piglit-util-gl.h"
  34
  35 PIGLIT_GL_TEST_CONFIG_BEGIN
  36
  37         config.supports_gl_compat_version = 10;
  38
  39         config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
  40
  41 PIGLIT_GL_TEST_CONFIG_END
  42
  43 static GLint prog;
  44
  45 enum piglit_result
  46 piglit_display(void)
  47 {
  48         GLboolean pass = GL_TRUE;
  49         static const float gray[]   = {0.5, 0.5, 0.5, 0.5};
  50
  51         /* Go ahead and draw with one matrix (gl_NormalScale = 1.0)
  52          * first. Don't bother testing this one.
  53          */
  54         piglit_ortho_projection(1, 1, GL_FALSE);
  55         piglit_draw_rect(0, 0, 1, 1);
  56
  57         /* Tweak the modelview and draw over it with another matrix. */
  58         glMatrixMode(GL_MODELVIEW);
  59         glScalef(1.0, 1.0, 0.5);
  60         piglit_draw_rect(0, 0, 1, 1);
  61
  62         pass = piglit_probe_rect_rgba(0, 0, piglit_width, piglit_height,
  63                                       gray);
  64
  65         piglit_present_results();
  66
  67         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
  68 }
  69
  70 void piglit_init(int argc, char **argv)
  71 {
  72         GLint vs, fs;
  73         int loc;
  74
  75         piglit_require_gl_version(20);
  76
  77         vs = piglit_compile_shader(GL_VERTEX_SHADER,
  78                                    "shaders/glsl-vs-normalscale.vert");
  79         fs = piglit_compile_shader(GL_FRAGMENT_SHADER,
  80                                    "shaders/glsl-color.frag");
  81
  82         prog = piglit_link_simple_program(vs, fs);
  83
  84         glUseProgram(prog);
  85
  86         loc = glGetUniformLocation(prog, "sampler");
  87         glUniform1i(loc, 1);
  88 }