tests/shaders/glsl-fs-sampler-numbering.c

   1 /*
   2  * Copyright © 2010 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 glsl-fs-sampler-numbering.c
  29  *
  30  * Tests that drivers correctly use the sampler uniform's value to
  31  * look up which gl texture unit is being used.
  32  */
  33
  34 #include "piglit-util-gl.h"
  35
  36 PIGLIT_GL_TEST_CONFIG_BEGIN
  37
  38         config.supports_gl_compat_version = 10;
  39
  40         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  41
  42 PIGLIT_GL_TEST_CONFIG_END
  43
  44 static int sampler_location;
  45 static GLint prog;
  46
  47 static const float white[4] = {1, 1, 1, 1};
  48 static const float black[4] = {0, 0, 0, 0};
  49
  50 enum piglit_result
  51 piglit_display(void)
  52 {
  53         GLboolean pass = GL_TRUE;
  54         /* result = 2 ^ args1 + args2 */
  55         int x1 = piglit_width / 4;
  56         int x2 = piglit_width * 3 / 4;
  57         int y1 = piglit_height / 4;
  58         int y2 = piglit_height * 3 / 4;
  59
  60         piglit_draw_rect_tex(0, 0, piglit_width, piglit_height,
  61                              0, 0, 1, 1);
  62
  63         pass &= piglit_probe_pixel_rgb(x1, y1, black);
  64         pass &= piglit_probe_pixel_rgb(x2, y1, white);
  65         pass &= piglit_probe_pixel_rgb(x1, y2, white);
  66         pass &= piglit_probe_pixel_rgb(x2, y2, black);
  67
  68         piglit_present_results();
  69
  70         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
  71 }
  72
  73 void
  74 piglit_init(int argc, char **argv)
  75 {
  76         GLint vs, fs;
  77
  78         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
  79
  80         piglit_require_gl_version(20);
  81
  82         vs = piglit_compile_shader(GL_VERTEX_SHADER,
  83                                    "shaders/glsl-tex-mvp.vert");
  84         fs = piglit_compile_shader(GL_FRAGMENT_SHADER,
  85                                    "shaders/glsl-tex.frag");
  86
  87         prog = piglit_link_simple_program(vs, fs);
  88
  89         glUseProgram(prog);
  90
  91         sampler_location = glGetUniformLocation(prog, "sampler");
  92         glUniform1i(sampler_location, 1);
  93
  94         glActiveTexture(GL_TEXTURE1);
  95         piglit_checkerboard_texture(0, 0, 2, 2, 1, 1, black, white);
  96         glEnable(GL_TEXTURE_2D);
  97 }