tests/shaders/fp-formats.c

   1 /*
   2  * Copyright © 2009 Intel Corporation
   3  * Copyright © 2010 Red Hat, Inc.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  22  * IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * \file fp-formats.c
  27  * Test fragment programs sampling from different texture formats.
  28  * (currently just alpha-only textures)
  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
  39 PIGLIT_GL_TEST_CONFIG_END
  40
  41 /**
  42  * Modulate the primary color with the alpha channel of the texture
  43  */
  44 static const char alpha_source[] =
  45         "!!ARBfp1.0\n"
  46         "TEMP texel0;\n"
  47         "TEX texel0,fragment.texcoord[0],texture[0],2D;\n"
  48         "MOV result.color, texel0.abgr;\n"
  49         "END"
  50         ;
  51
  52 static GLint progs[1];
  53 static GLuint textures[1];
  54
  55 enum piglit_result
  56 piglit_display(void)
  57 {
  58         enum piglit_result result = PIGLIT_PASS;
  59
  60         const GLfloat expected[4] = { 0.5, 0.0, 0.0, 0.0 };
  61
  62         glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, progs[0]);
  63
  64         glClear(GL_COLOR_BUFFER_BIT);
  65         glEnable(GL_FRAGMENT_PROGRAM_ARB);
  66
  67         piglit_draw_rect(0, 0, piglit_width, piglit_height);
  68
  69         if (!piglit_probe_pixel_rgb(piglit_width / 2,
  70                                     piglit_height / 2,
  71                                     expected))
  72           result = PIGLIT_FAIL;
  73
  74         piglit_present_results();
  75         return result;
  76 }
  77
  78
  79 void
  80 piglit_init(int argc, char **argv)
  81 {
  82         const GLfloat alpha_data[] = { 0.5 };
  83
  84         (void) argc;
  85         (void) argv;
  86
  87         piglit_require_fragment_program();
  88         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
  89
  90         progs[0] = piglit_compile_program(GL_FRAGMENT_PROGRAM_ARB,
  91                                           alpha_source);
  92
  93         glGenTextures(1, textures);
  94
  95         glActiveTexture(GL_TEXTURE0);
  96         glBindTexture(GL_TEXTURE_2D, textures[0]);
  97         glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, 1, 1, 0, GL_ALPHA, GL_FLOAT, alpha_data);
  98         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
  99         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 100
 101         glClearColor(1.0, 1.0, 1.0, 1.0);
 102 }