tests/shaders/vp-clipdistance-01.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-01.c
  26  * Basic validation of NV_vertex_program2 result.clip[].
  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  6
  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         "PARAM  colors[] = { program.env[0..3] };\n"
  51         "ADDRESS        A0;\n"
  52         "\n"
  53         "MOV    result.clip[%d].x, vertex.texcoord[0].x;\n"
  54         "MOV    result.color, vertex.texcoord[0].x;\n"
  55         PIGLIT_VERTEX_PROGRAM_MVP_TRANSFORM
  56         "END\n"
  57         ;
  58
  59 static const char fragment_source[] =
  60         "!!ARBfp1.0\n"
  61         "TEMP   R0;\n"
  62         "MOV    R0, {0.0, 0.0, 0.0, 1.0};\n"
  63         "SGE    R0.y, fragment.color, {0.0}.x;\n"
  64         "SLT    R0.x, fragment.color, {0.0}.x;\n"
  65         "MOV    result.color, R0;\n"
  66         "END"
  67         ;
  68
  69 /**
  70  * \name Handles to programs.
  71  */
  72 /*@{*/
  73 static GLint progs[TEST_COLS];
  74 static GLint frag_prog;
  75 /*@}*/
  76
  77
  78 static const GLfloat clear_color[4] = { 0.5, 0.5, 0.5, 1.0 };
  79
  80
  81 enum piglit_result
  82 piglit_display(void)
  83 {
  84         static const GLfloat color[4] = { 0.0, 1.0, 0.0, 1.0 };
  85         static const GLfloat bad_color[4] = { 1.0, 0.0, 0.0, 1.0 };
  86         enum piglit_result result = PIGLIT_PASS;
  87         unsigned i;
  88
  89         glClear(GL_COLOR_BUFFER_BIT);
  90
  91         glProgramEnvParameter4fvARB(GL_VERTEX_PROGRAM_ARB, 0, bad_color);
  92         glProgramEnvParameter4fvARB(GL_VERTEX_PROGRAM_ARB, 1, color);
  93         glProgramEnvParameter4fvARB(GL_VERTEX_PROGRAM_ARB, 2, color);
  94         glProgramEnvParameter4fvARB(GL_VERTEX_PROGRAM_ARB, 3, color);
  95
  96         for (i = 0; i < ARRAY_SIZE(progs); i++) {
  97                 const int x = 1 + (i * (BOX_SIZE + 1));
  98
  99                 glBindProgramARB(GL_VERTEX_PROGRAM_ARB, progs[i]);
 100                 glEnable(GL_CLIP_PLANE0 + i);
 101                 piglit_draw_rect_tex(x, 1, BOX_SIZE, BOX_SIZE,
 102                                      1.0, 1.0, -2.0, 0.0);
 103                 glDisable(GL_CLIP_PLANE0 + i);
 104
 105                 if (!piglit_probe_pixel_rgb(x + (BOX_SIZE / 2) - 2,
 106                                             1 + (BOX_SIZE / 2),
 107                                             color)) {
 108                         result = PIGLIT_FAIL;
 109                 }
 110
 111                 if (!piglit_probe_pixel_rgb(x + (BOX_SIZE / 2) + 2,
 112                                             1 + (BOX_SIZE / 2),
 113                                             clear_color)) {
 114                         result = PIGLIT_FAIL;
 115                 }
 116         }
 117
 118         piglit_present_results();
 119         return result;
 120 }
 121
 122
 123 void
 124 piglit_init(int argc, char **argv)
 125 {
 126         unsigned i;
 127
 128         (void) argc;
 129         (void) argv;
 130
 131         piglit_require_vertex_program();
 132         piglit_require_fragment_program();
 133         piglit_require_extension("GL_NV_vertex_program2_option");
 134         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
 135
 136         for (i = 0; i < ARRAY_SIZE(progs); i++) {
 137                 char shader_source[1024];
 138
 139                 snprintf(shader_source, sizeof(shader_source),
 140                          vertex_source_template, i);
 141
 142                 progs[i] = piglit_compile_program(GL_VERTEX_PROGRAM_ARB,
 143                                                   shader_source);
 144         }
 145
 146         glEnable(GL_FRAGMENT_PROGRAM_ARB);
 147         glEnable(GL_VERTEX_PROGRAM_ARB);
 148
 149         frag_prog = piglit_compile_program(GL_FRAGMENT_PROGRAM_ARB,
 150                                            fragment_source);
 151         glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, frag_prog);
 152
 153         glClearColor(clear_color[0],
 154                      clear_color[1],
 155                      clear_color[2],
 156                      clear_color[3]);
 157 }