tests/shaders/vp-clipdistance-03.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
  24 /**
  25  * \file vp-clipdistance-03.c
  26  * Validate that writes to Y, Z, and W of result.clip has no effect.
  27  *
  28  * \author Ian Romanick <ian.d.romanick@intel.com>
  29  */
  30
  31 #include "piglit-util-gl.h"
  32
  33 #define TEST_ROWS  1
  34 #define TEST_COLS  1
  35 #define BOX_SIZE   32
  36
  37 PIGLIT_GL_TEST_CONFIG_BEGIN
  38
  39         config.supports_gl_compat_version = 10;
  40
  41         config.window_width = (((BOX_SIZE+1)*TEST_COLS)+1);
  42         config.window_height = (((BOX_SIZE+1)*TEST_ROWS)+1);
  43         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  44
  45 PIGLIT_GL_TEST_CONFIG_END
  46
  47 static const char vertex_source_template[] =
  48         "!!ARBvp1.0\n"
  49         "OPTION NV_vertex_program2;\n"
  50         "MOV    result.clip[0], vertex.texcoord[0].yxxx;\n"
  51         PIGLIT_VERTEX_PROGRAM_MVP_TRANSFORM
  52         "END\n"
  53         ;
  54
  55 static const char fragment_source[] =
  56         "!!ARBfp1.0\n"
  57         "MOV    result.color, {0.0, 1.0, 0.0, 1.0};\n"
  58         "END"
  59         ;
  60
  61 /**
  62  * \name Handles to programs.
  63  */
  64 /*@{*/
  65 static GLint progs[TEST_COLS];
  66 static GLint frag_prog;
  67 /*@}*/
  68
  69
  70 static const GLfloat clear_color[4] = { 0.5, 0.5, 0.5, 1.0 };
  71
  72
  73 enum piglit_result
  74 piglit_display(void)
  75 {
  76         static const GLfloat color[4] = { 0.0, 1.0, 0.0, 1.0 };
  77         enum piglit_result result = PIGLIT_PASS;
  78         unsigned i;
  79
  80         glClear(GL_COLOR_BUFFER_BIT);
  81
  82         for (i = 0; i < ARRAY_SIZE(progs); i++) {
  83                 const int x = 1 + (i * (BOX_SIZE + 1));
  84
  85                 glBindProgramARB(GL_VERTEX_PROGRAM_ARB, progs[i]);
  86                 glEnable(GL_CLIP_PLANE0 + i);
  87                 piglit_draw_rect_tex(x, 1, BOX_SIZE, BOX_SIZE,
  88                                      1.0, 1.0, -2.0, 0.0);
  89                 glDisable(GL_CLIP_PLANE0 + i);
  90
  91                 if (!piglit_probe_pixel_rgb(x + (BOX_SIZE / 2),
  92                                             1 + (BOX_SIZE / 2),
  93                                             color)) {
  94                         result = PIGLIT_FAIL;
  95                 }
  96         }
  97
  98         piglit_present_results();
  99         return result;
 100 }
 101
 102
 103 void
 104 piglit_init(int argc, char **argv)
 105 {
 106         unsigned i;
 107
 108         (void) argc;
 109         (void) argv;
 110
 111         piglit_require_vertex_program();
 112         piglit_require_fragment_program();
 113         piglit_require_extension("GL_NV_vertex_program2_option");
 114         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
 115
 116         for (i = 0; i < ARRAY_SIZE(progs); i++) {
 117                 char shader_source[1024];
 118
 119                 snprintf(shader_source, sizeof(shader_source),
 120                          vertex_source_template);
 121
 122                 progs[i] = piglit_compile_program(GL_VERTEX_PROGRAM_ARB,
 123                                                   shader_source);
 124         }
 125
 126         glEnable(GL_FRAGMENT_PROGRAM_ARB);
 127         glEnable(GL_VERTEX_PROGRAM_ARB);
 128
 129         frag_prog = piglit_compile_program(GL_FRAGMENT_PROGRAM_ARB,
 130                                            fragment_source);
 131         glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, frag_prog);
 132
 133         glClearColor(clear_color[0],
 134                      clear_color[1],
 135                      clear_color[2],
 136                      clear_color[3]);
 137 }