tests/general/dlist-color-material.c

   1 /*
   2  * Copyright (c) 2012 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  * Test glColorMaterial with glMaterial calls in a display list.
  26  * Used to test/fix a Mesa bug.
  27  *
  28  * Example: if glColorMaterial(GL_FRONT, GL_AMBIENT) is called and we
  29  * set the ambient material with glColor3f(green), then a call to
  30  * glMaterialfv(GL_FRONT, GL_AMBIENT, red) (in a display list) should
  31  * be a no-op.
  32  */
  33
  34
  35 #include <assert.h>
  36 #include "piglit-util-gl.h"
  37
  38 PIGLIT_GL_TEST_CONFIG_BEGIN
  39
  40         config.supports_gl_compat_version = 10;
  41
  42         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  43
  44 PIGLIT_GL_TEST_CONFIG_END
  45
  46 /**
  47  * Test glMaterial handling in a display list for one of GL_AMBIENT,
  48  * GL_DIFFUSE or GL_SPECULAR.
  49  */
  50 bool
  51 test_material_coef(GLenum coef)
  52 {
  53    static const GLfloat black[4] = {0, 0, 0, 0};
  54    static const GLfloat white[4] = {1, 1, 1, 1};
  55    static const GLfloat red[4] = {1, 0, 0, 1};
  56    static const GLfloat green[4] = {0, 1, 0, 1};
  57    bool result;
  58
  59    assert(coef == GL_AMBIENT ||
  60           coef == GL_DIFFUSE ||
  61           coef == GL_SPECULAR);
  62
  63    glDisable(GL_COLOR_MATERIAL);
  64
  65    /* set all mat coefs to black */
  66    glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, black);
  67    glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, black);
  68    glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, black);
  69
  70    /* set all light coefs to black */
  71    glLightfv(GL_LIGHT0, GL_AMBIENT, black);
  72    glLightfv(GL_LIGHT0, GL_DIFFUSE, black);
  73    glLightfv(GL_LIGHT0, GL_SPECULAR, black);
  74
  75    /* Now test the coefficient of interest */
  76    glLightfv(GL_LIGHT0, coef, white);  /* white light */
  77    glEnable(GL_COLOR_MATERIAL);
  78    glColorMaterial(GL_FRONT_AND_BACK, coef);
  79
  80    /* Set the material coef via glColor - this is what we want to see */
  81    glColor4fv(green);
  82
  83    /* This glMaterial setting should be ignored since glColorMaterial says
  84     * that glColor overrides the latched material.
  85     */
  86    glNewList(1, GL_COMPILE);
  87    glMaterialfv(GL_FRONT_AND_BACK, coef, red);
  88    glEndList();
  89    glCallList(1);
  90
  91    /* draw tri (should be green, not red) */
  92    glClear(GL_COLOR_BUFFER_BIT);
  93    glBegin(GL_TRIANGLES);
  94    glNormal3f(0, 0, 1);
  95    glVertex2f(-1, -1);
  96    glVertex2f( 1, -1);
  97    glVertex2f( 0,  1);
  98    glEnd();
  99
 100    result = piglit_probe_pixel_rgb(piglit_width / 2, piglit_height / 2, green);
 101
 102    /* also query the material coef and check it */
 103    {
 104       GLfloat mat[4];
 105       glGetMaterialfv(GL_FRONT, coef, mat);
 106       if (mat[0] != green[0] ||
 107           mat[1] != green[1] ||
 108           mat[2] != green[2]) {
 109          printf("glGetMaterial failed."
 110                 "  Expected (%g, %g, %g, %g)  Found (%g, %g, %g, %g)\n",
 111                 green[0], green[1], green[2], green[3],
 112                 mat[0], mat[1], mat[2], mat[3]);
 113          result = false;
 114       }
 115    }
 116
 117    piglit_present_results();
 118
 119    return result;
 120 }
 121
 122
 123 enum piglit_result
 124 piglit_display(void)
 125 {
 126    if (!test_material_coef(GL_AMBIENT))
 127       return PIGLIT_FAIL;
 128    if (!test_material_coef(GL_DIFFUSE))
 129       return PIGLIT_FAIL;
 130    if (!test_material_coef(GL_SPECULAR))
 131       return PIGLIT_FAIL;
 132
 133    return PIGLIT_PASS;
 134 }
 135
 136
 137 void
 138 piglit_init(int argc, char **argv)
 139 {
 140    glEnable(GL_LIGHTING);
 141    glEnable(GL_LIGHT0);
 142 }