tests/general/two-sided-lighting-separate-specular.c

   1 /*
   2  * Copyright © 2011 VMware, Inc.
   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
  24 /**
  25  * Tests simple two-sided lighting with separate specular color.
  26  *
  27  * One command line option: if "flat" is specified, use flat shading.
  28  * It shouldn't make any difference though because we only specify one normal
  29  * vector per quad.
  30  *
  31  * Brian Paul
  32  * Oct 2011
  33  */
  34
  35 #include "piglit-util-gl.h"
  36
  37 PIGLIT_GL_TEST_CONFIG_BEGIN
  38
  39         config.supports_gl_compat_version = 10;
  40
  41         config.window_width = 256;
  42         config.window_height = 256;
  43         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  44
  45 PIGLIT_GL_TEST_CONFIG_END
  46
  47 static const GLfloat red[4] = {1, 0, 0, 0};
  48 static const GLfloat green[4] = {0, 1, 0, 1};
  49 static const GLfloat blue[4] = {0, 0, 1, 1};
  50 static const GLfloat purple[4] = {1, 0, 1, 1};
  51 static const GLfloat yellow[4] = {1, 1, 0, 1};
  52
  53
  54 enum piglit_result
  55 piglit_display(void)
  56 {
  57         int x0 = piglit_width * 1 / 4;
  58         int x1 = piglit_width * 3 / 4;
  59         int y0 = piglit_height * 1 / 4;
  60         int y1 = piglit_height * 3 / 4;
  61         GLboolean pass = GL_TRUE;
  62
  63         glClear(GL_COLOR_BUFFER_BIT);
  64
  65         glFrontFace(GL_CCW);  /* the default winding */
  66
  67         glBegin(GL_QUADS);
  68         /* counter-clockwise / front-facing */
  69         glNormal3f(0, 0, 1);
  70         glVertex2f(-1.0, -1.0);
  71         glVertex2f( 0.0, -1.0);
  72         glVertex2f( 0.0,  0.0);
  73         glVertex2f(-1.0,  0.0);
  74
  75         /* clockwise / back-facing */
  76         glNormal3f(0, 0, -1);
  77         glVertex2f( 0.0, -1.0);
  78         glVertex2f( 0.0,  0.0);
  79         glVertex2f( 1.0,  0.0);
  80         glVertex2f( 1.0, -1.0);
  81         glEnd();
  82
  83         glFrontFace(GL_CW);  /* reverse winding */
  84
  85         glBegin(GL_QUADS);
  86         /* counter-clockwise / back-facing */
  87         glNormal3f(0, 0, -1);
  88         glVertex2f(-1.0, 0.0);
  89         glVertex2f( 0.0, 0.0);
  90         glVertex2f( 0.0, 1.0);
  91         glVertex2f(-1.0, 1.0);
  92
  93         /* clockwise / front-facing */
  94         glNormal3f(0, 0, 1);
  95         glVertex2f( 0.0, 0.0);
  96         glVertex2f( 0.0, 1.0);
  97         glVertex2f( 1.0, 1.0);
  98         glVertex2f( 1.0, 0.0);
  99         glEnd();
 100
 101         pass = piglit_probe_pixel_rgb(x0, y0, yellow) && pass;
 102         pass = piglit_probe_pixel_rgb(x1, y0, purple) && pass;
 103         pass = piglit_probe_pixel_rgb(x0, y1, purple) && pass;
 104         pass = piglit_probe_pixel_rgb(x1, y1, yellow) && pass;
 105
 106         piglit_present_results();
 107
 108         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 109 }
 110
 111
 112 void
 113 piglit_init(int argc, char **argv)
 114 {
 115         GLubyte teximage[8][8][4];
 116         GLuint t;
 117         int i;
 118
 119         for (i = 1; i < argc; i++) {
 120                 if (strcmp(argv[i], "flat") == 0) {
 121                         glShadeModel(GL_FLAT);
 122                         break;
 123                 }
 124         }
 125
 126         glClearColor(0.5, 0.5, 0.5, 0.0);
 127
 128         glMatrixMode(GL_PROJECTION);
 129         glLoadIdentity();
 130         glOrtho(-1.1, 1.1, -1.1, 1.1, -1.0, 1.0);
 131         glMatrixMode(GL_MODELVIEW);
 132         glLoadIdentity();
 133
 134         /* front diffuse = green */
 135         /* back diffuse = blue */
 136         /* front/back specular = red */
 137         glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green);
 138         glMaterialfv(GL_BACK, GL_AMBIENT_AND_DIFFUSE, blue);
 139         glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, red);
 140         glLightModeli( GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
 141         glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE);
 142         glEnable(GL_LIGHT0);
 143         glEnable(GL_LIGHTING);
 144
 145         /* make solid white texture */
 146         glGenTextures(1, &t);
 147         glBindTexture(GL_TEXTURE_2D, t);
 148         memset(teximage, 255, sizeof(teximage));
 149         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 150         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 151         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 8, 8, 0,
 152                      GL_RGBA, GL_UNSIGNED_BYTE, teximage);
 153         glEnable(GL_TEXTURE_2D);
 154 }