tests/shaders/vp-clipdistance-04.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-04.c
  26  * Validate that result.clip[] is pre-initialized with 0.
  27  *
  28  * Each block enables one clip plane but writes a distance for a different
  29  * clip plane.  Since clipping only happens for clip distances < 0, there
  30  * should be no clipping.
  31  *
  32  * \author Ian Romanick <ian.d.romanick@intel.com>
  33  */
  34
  35 #include "piglit-util.h"
  36 #include "piglit-framework.h"
  37
  38 #define ELEMENTS(x)  (sizeof(x) / sizeof(x[0]))
  39
  40 #define TEST_ROWS  1
  41 #define TEST_COLS  6
  42 #define BOX_SIZE   32
  43
  44
  45 int piglit_window_mode = GLUT_DOUBLE;
  46 int piglit_width = (((BOX_SIZE+1)*TEST_COLS)+1);
  47 int piglit_height = (((BOX_SIZE+1)*TEST_ROWS)+1);
  48
  49
  50 static const char vertex_source_template[] =
  51         "!!ARBvp1.0\n"
  52         "OPTION NV_vertex_program2;\n"
  53         "MOV    result.clip[%d], vertex.texcoord[0].x;\n"
  54         PIGLIT_VERTEX_PROGRAM_MVP_TRANSFORM
  55         "END\n"
  56         ;
  57
  58 static const char fragment_source[] =
  59         "!!ARBfp1.0\n"
  60         "MOV    result.color, {0.0, 1.0, 0.0, 1.0};\n"
  61         "END"
  62         ;
  63
  64 /**
  65  * \name Handles to programs.
  66  */
  67 /*@{*/
  68 static GLint progs[TEST_COLS];
  69 static GLint frag_prog;
  70 /*@}*/
  71
  72
  73 static const GLfloat clear_color[4] = { 0.5, 0.5, 0.5, 1.0 };
  74
  75
  76 enum piglit_result
  77 piglit_display(void)
  78 {
  79         static const GLfloat color[4] = { 0.0, 1.0, 0.0, 1.0 };
  80         enum piglit_result result = PIGLIT_SUCCESS;
  81         unsigned i;
  82
  83         glClear(GL_COLOR_BUFFER_BIT);
  84
  85         for (i = 0; i < ELEMENTS(progs); i++) {
  86                 const int x = 1 + (i * (BOX_SIZE + 1));
  87                 const GLenum p = GL_CLIP_PLANE0 + ((i + 1) % 6);
  88
  89                 glBindProgramARB(GL_VERTEX_PROGRAM_ARB, progs[i]);
  90                 glEnable(p);
  91                 piglit_draw_rect_tex(x, 1, BOX_SIZE, BOX_SIZE,
  92                                      1.0, 1.0, -2.0, 0.0);
  93                 glDisable(p);
  94
  95                 if (!piglit_probe_pixel_rgb(x + (BOX_SIZE / 2),
  96                                             1 + (BOX_SIZE / 2),
  97                                             color)) {
  98                         result = PIGLIT_FAILURE;
  99                 }
 100         }
 101
 102         glutSwapBuffers();
 103         return result;
 104 }
 105
 106
 107 void
 108 piglit_init(int argc, char **argv)
 109 {
 110         unsigned i;
 111
 112         (void) argc;
 113         (void) argv;
 114
 115         piglit_require_vertex_program();
 116         piglit_require_fragment_program();
 117         piglit_require_extension("GL_NV_vertex_program2_option");
 118         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
 119
 120         for (i = 0; i < ELEMENTS(progs); i++) {
 121                 char shader_source[1024];
 122
 123                 snprintf(shader_source, sizeof(shader_source),
 124                          vertex_source_template, i);
 125
 126                 progs[i] = piglit_compile_program(GL_VERTEX_PROGRAM_ARB,
 127                                                   shader_source);
 128         }
 129
 130         glEnable(GL_FRAGMENT_PROGRAM_ARB);
 131         glEnable(GL_VERTEX_PROGRAM_ARB);
 132
 133         frag_prog = piglit_compile_program(GL_FRAGMENT_PROGRAM_ARB,
 134                                            fragment_source);
 135         glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, frag_prog);
 136
 137         glClearColor(clear_color[0],
 138                      clear_color[1],
 139                      clear_color[2],
 140                      clear_color[3]);
 141 }