tests/texturing/rg-draw-pixels.c

   1 /*
   2  * Copyright Â© 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
  21  * DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *   Ben Holmes <shranzel@hotmail.com>
  25  */
  26
  27 /* This test draws to the screen using glDrawPixels with data formats of GL_RED
  28  * and GL_RG and tests for the correct color output.
  29  */
  30
  31 #include "piglit-util-gl.h"
  32
  33 PIGLIT_GL_TEST_CONFIG_BEGIN
  34
  35         config.supports_gl_compat_version = 10;
  36
  37         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  38         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  39
  40 PIGLIT_GL_TEST_CONFIG_END
  41
  42 void
  43 piglit_init(int argc, char **argv)
  44 {
  45         piglit_require_extension("GL_ARB_texture_rg");
  46         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
  47
  48         glEnable(GL_TEXTURE_2D);
  49         glClearColor(0.2, 0.2, 0.2, 1.0);
  50 }
  51
  52 enum piglit_result
  53 piglit_display(void)
  54 {
  55         static const GLfloat red[3] = {1.0, 0.0, 0.0};
  56         static const GLfloat rg[3] = {1.0, 1.0, 0.0};
  57         static const GLfloat black[3] = {0.0, 0.0, 0.0};
  58         #define height 16
  59         #define width 16
  60         int i, j;
  61         GLfloat texData[width][height][4];
  62         GLboolean pass = GL_TRUE;
  63
  64         glClear(GL_COLOR_BUFFER_BIT);
  65
  66
  67         for (i=0; i < width; ++i) {
  68                 for (j=0; j < height; ++j) {
  69                         if ((i+j) & 1) {
  70                                 texData[i][j][0] = 1.0;
  71                                 texData[i][j][1] = 1.0;
  72                                 texData[i][j][2] = 1.0;
  73                                 texData[i][j][3] = 1.0;
  74                         }
  75                         else {
  76                                 texData[i][j][0] = 0.0;
  77                                 texData[i][j][1] = 0.0;
  78                                 texData[i][j][2] = 0.0;
  79                                 texData[i][j][3] = 0.0;
  80                         }
  81                 }
  82         }
  83
  84         /* The image consists of alternating patterns of 4 0.0 values followed
  85          * by 4 1.0 values.  When drawn as GL_RED, this results in 4x4 pixel
  86          * blocks of black and red.  When drawn as GL_RG, this results in 2x2
  87          * pixel blocks of gold (full green and full red).
  88          */
  89         glRasterPos2i(0,0);
  90         glDrawPixels(width,height,GL_RED,GL_FLOAT,texData);
  91
  92         glRasterPos2i(18,0);
  93         glDrawPixels(width,height,GL_RG,GL_FLOAT,texData);
  94
  95         pass = pass && piglit_probe_pixel_rgb(0,0,black);
  96         pass = pass && piglit_probe_pixel_rgb(2,0,black);
  97         pass = pass && piglit_probe_pixel_rgb(4,0,red);
  98         pass = pass && piglit_probe_pixel_rgb(6,0,red);
  99
 100         pass = pass && piglit_probe_pixel_rgb(18,0,black);
 101         pass = pass && piglit_probe_pixel_rgb(19,0,black);
 102         pass = pass && piglit_probe_pixel_rgb(20,0,rg);
 103         pass = pass && piglit_probe_pixel_rgb(21,0,rg);
 104
 105         piglit_present_results();
 106
 107         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 108
 109         #undef height
 110         #undef width
 111 }