tests/general/stencil-drawpixels.c

   1 /*
   2  * Copyright © 2009 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 stencil-drawpixels.c
  29  *
  30  * Tests that glDrawPixels(GL_STENCIL) minimally works.
  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_DOUBLE | PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DEPTH | PIGLIT_GL_VISUAL_STENCIL;
  40
  41 PIGLIT_GL_TEST_CONFIG_END
  42
  43 enum piglit_result
  44 piglit_display(void)
  45 {
  46         GLboolean pass = GL_TRUE;
  47         int i;
  48         static float red[]   = {1.0, 0.0, 0.0, 0.0};
  49         static float green[] = {0.0, 1.0, 0.0, 0.0};
  50         static float blue[]  = {0.0, 0.0, 1.0, 0.0};
  51         static float square[100];
  52
  53         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
  54
  55         /* whole window gray -- none should be visible */
  56         glClearColor(0.5, 0.5, 0.5, 0.0);
  57         glClear(GL_COLOR_BUFFER_BIT);
  58
  59         /* Clear stencil to 0, which will be drawn red */
  60         glClearStencil(0);
  61         glClear(GL_STENCIL_BUFFER_BIT);
  62
  63         /* quad at 10, 10 that will be drawn green. */
  64         for (i = 0; i < 100; i++)
  65                 square[i] = 1.0;
  66         glRasterPos2i(10, 10);
  67         glDrawPixels(10, 10, GL_STENCIL_INDEX, GL_FLOAT, square);
  68
  69         /* quad at 30, 10 that will be drawn blue. */
  70         for (i = 0; i < 100; i++)
  71                 square[i] = 2.0;
  72         glRasterPos2i(30, 10);
  73         glDrawPixels(10, 10, GL_STENCIL_INDEX, GL_FLOAT, square);
  74
  75         glDisable(GL_SCISSOR_TEST);
  76         glEnable(GL_STENCIL_TEST);
  77         glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
  78
  79         /* First quad -- stencil == 0 gets red */
  80         glStencilFunc(GL_EQUAL, 0, ~0);
  81         glColor4fv(red);
  82         piglit_draw_rect(0, 0, piglit_width, piglit_height);
  83
  84         /* Second quad -- stencil == 1 gets green */
  85         glStencilFunc(GL_EQUAL, 1, ~0);
  86         glColor4fv(green);
  87         piglit_draw_rect(0, 0, piglit_width, piglit_height);
  88
  89         /* Last quad -- stencil == 2 gets blue */
  90         glStencilFunc(GL_EQUAL, 2, ~0);
  91         glColor4fv(blue);
  92         piglit_draw_rect(0, 0, piglit_width, piglit_height);
  93
  94         if (!piglit_check_gl_error(GL_NO_ERROR))
  95                 piglit_report_result(PIGLIT_FAIL);
  96
  97         pass &= piglit_probe_rect_rgb(0, 0, piglit_width, 10, red);
  98
  99         pass &= piglit_probe_rect_rgb(0, 10, 10, 10, red);
 100         pass &= piglit_probe_rect_rgb(10, 10, 10, 10, green);
 101         pass &= piglit_probe_rect_rgb(20, 10, 10, 10, red);
 102         pass &= piglit_probe_rect_rgb(30, 10, 10, 10, blue);
 103         pass &= piglit_probe_rect_rgb(40, 10, piglit_width-40, 10, red);
 104
 105         pass &= piglit_probe_rect_rgb(0, 20, piglit_width, piglit_height - 20,
 106                                       red);
 107
 108         piglit_present_results();
 109
 110         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 111 }
 112
 113
 114 void
 115 piglit_init(int argc, char **argv)
 116 {
 117 }