tests/general/draw-pixel-with-texture.c

   1 /*
   2  * Copyright (C) 2011 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
  24 #include "piglit-util-gl.h"
  25
  26 PIGLIT_GL_TEST_CONFIG_BEGIN
  27
  28         config.supports_gl_compat_version = 10;
  29
  30         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  31
  32 PIGLIT_GL_TEST_CONFIG_END
  33
  34 #define SCREEN_SIZE_IN_PIXELS   (piglit_width * piglit_height * 4)
  35
  36
  37 enum piglit_result
  38 piglit_display(void)
  39 {
  40         GLboolean pass = GL_TRUE;
  41         GLfloat tex_data[2 * 2 * 4] = {
  42                1, 0, 0, 1,     0, 1, 1, 1,
  43                0, 1, 0, 1,     0, 0, 1, 1,
  44         };
  45         GLfloat *pixels;
  46         GLfloat expected[4] = {0.2, 0, 0, 1};
  47         int i;
  48
  49         pixels = (GLfloat *) malloc(SCREEN_SIZE_IN_PIXELS * sizeof(GLfloat));
  50
  51         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 2, 2, 0, GL_RGBA, GL_FLOAT, tex_data);
  52         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
  53         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
  54         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
  55
  56        glTexCoord2f(0.25, 0.25);
  57         glEnable(GL_TEXTURE_2D);
  58
  59         for (i = 0; i < SCREEN_SIZE_IN_PIXELS; i += 4) {
  60                 pixels[i + 0] = 0.2;
  61                 pixels[i + 1] = 1;
  62                pixels[i + 2] = 0.4;
  63                 pixels[i + 3] = 1;
  64         }
  65
  66         glClear(GL_COLOR_BUFFER_BIT);
  67         glDrawPixels(piglit_width, piglit_height, GL_RGBA, GL_FLOAT, pixels);
  68
  69         pass = piglit_probe_rect_rgba(0, 0, piglit_width, piglit_height, expected);
  70
  71         piglit_present_results();
  72
  73         free(pixels);
  74
  75         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
  76 }
  77
  78
  79 void
  80 piglit_init(int argc, char **argv)
  81 {
  82         glClearColor(0.0, 0.0, 0.0, 1.0);
  83 }