tests/shaders/glsl-orangebook-ch06-bump.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-orangebook-ch06-bump.c
  29  *
  30  * Tests that the Orange Book's chapter 6 shader for procedural bumpmapping
  31  * works correctly.
  32  */
  33
  34 #include "piglit-util-gl.h"
  35
  36 PIGLIT_GL_TEST_CONFIG_BEGIN
  37
  38         config.supports_gl_compat_version = 10;
  39
  40         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  41
  42 PIGLIT_GL_TEST_CONFIG_END
  43
  44 /* Test size - note that the pixel probing below is very specific */
  45 #define WIDTH 100
  46 #define HEIGHT 100
  47
  48
  49 static int bump_density_location, bump_size_location;
  50 static int specular_factor_location, surface_color_location;
  51 static int light_position_location, tangent_attrib;
  52 static GLint prog;
  53
  54 enum piglit_result
  55 piglit_display(void)
  56 {
  57         GLboolean pass = GL_TRUE;
  58         static const float surface_color[3] = {0.7, 0.6, 0.18};
  59         static const float test_specular[3] = {0.976, 0.894, 0.549};
  60         static const float test_nonspecular[3] = {0.572, 0.490, 0.145};
  61         static const float test_bump_dark[3] = {0.411, 0.352, 0.105};
  62         static const float test_bump_light[3] = {1.0, 0.961, 0.557};
  63         float light_position[3] = {-1.0, -1.0, 2.0};
  64         float w = WIDTH;
  65         float h = HEIGHT;
  66         float bump_x = w * 3 / 8;
  67         float bump_y = h * 3 / 8;
  68         float x, y;
  69
  70         if (piglit_width < WIDTH || piglit_height < HEIGHT) {
  71                 printf("window is too small.\n");
  72                 return PIGLIT_SKIP;
  73         }
  74
  75         piglit_ortho_projection(1, 1, GL_FALSE);
  76
  77         glViewport(0, 0, WIDTH, HEIGHT);
  78         glClearColor(0.5, 0.5, 0.5, 0.5);
  79         glClear(GL_COLOR_BUFFER_BIT);
  80
  81         glUniform1f(bump_density_location, 4);
  82         glUniform1f(bump_size_location, 0.15);
  83         glUniform1f(specular_factor_location, 0.5);
  84         glUniform3fv(surface_color_location, 1, surface_color);
  85         glUniform3fv(light_position_location, 1, light_position);
  86
  87         glTranslatef(0, 0, -0.5);
  88         glNormal3f(0.0, 0.0, 1.0);
  89         glVertexAttrib3f(tangent_attrib, 1.0, 0.0, 0.0);
  90         for (x = 0.0; x < 1.0; x += 0.1) {
  91                 for (y = 0.0; y < 1.0; y += 0.1) {
  92                         piglit_draw_rect_tex(x, y, 0.1, 0.1,
  93                                              x, y, 0.1, 0.1);
  94                 }
  95         }
  96
  97         /* Corners of the image: A highly specular point, and a
  98          * non-specular point.
  99          */
 100         pass &= piglit_probe_pixel_rgb(0, 0, test_specular);
 101         pass &= piglit_probe_pixel_rgb(WIDTH - 1, HEIGHT - 1,
 102                                        test_nonspecular);
 103
 104         /* Look at a bump -- does it have a lit part and an unlit part? */
 105         pass &= piglit_probe_pixel_rgb(bump_x + w / 16, bump_y + h / 16,
 106                                        test_bump_dark);
 107         pass &= piglit_probe_pixel_rgb(bump_x - w / 16, bump_y - h / 16,
 108                                        test_bump_light);
 109
 110         piglit_present_results();
 111
 112         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 113 }
 114
 115 void
 116 piglit_init(int argc, char **argv)
 117 {
 118         GLint vs, fs;
 119
 120         piglit_require_gl_version(20);
 121
 122         vs = piglit_compile_shader(GL_VERTEX_SHADER,
 123                                    "shaders/glsl-orangebook-ch06-bump.vert");
 124         fs = piglit_compile_shader(GL_FRAGMENT_SHADER,
 125                                    "shaders/glsl-orangebook-ch06-bump.frag");
 126
 127         prog = piglit_link_simple_program(vs, fs);
 128
 129         glUseProgram(prog);
 130
 131         bump_density_location = glGetUniformLocation(prog, "BumpDensity");
 132         bump_size_location = glGetUniformLocation(prog, "BumpSize");
 133         specular_factor_location = glGetUniformLocation(prog, "SpecularFactor");
 134         surface_color_location = glGetUniformLocation(prog, "SurfaceColor");
 135         light_position_location = glGetUniformLocation(prog, "LightPosition");
 136         assert(bump_density_location != -1);
 137         assert(bump_size_location != -1);
 138         assert(specular_factor_location != -1);
 139         assert(surface_color_location != -1);
 140         assert(light_position_location != -1);
 141
 142         tangent_attrib = glGetAttribLocation(prog, "Tangent");
 143         assert(tangent_attrib != -1);
 144 }