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.h"
  32 #include "piglit-framework.h"
  33
  34 #define ELEMENTS(x)  (sizeof(x) / sizeof(x[0]))
  35
  36 #define TEST_ROWS  1
  37 #define TEST_COLS  1
  38 #define BOX_SIZE   32
  39
  40
  41 int piglit_window_mode = GLUT_DOUBLE;
  42 int piglit_width = (((BOX_SIZE+1)*TEST_COLS)+1);
  43 int piglit_height = (((BOX_SIZE+1)*TEST_ROWS)+1);
  44
  45
  46 static const char vertex_source_template[] =
  47         "!!ARBvp1.0\n"
  48         "OPTION NV_vertex_program2;\n"
  49         "MOV    result.clip[0], vertex.texcoord[0].yxxx;\n"
  50         PIGLIT_VERTEX_PROGRAM_MVP_TRANSFORM
  51         "END\n"
  52         ;
  53
  54 static const char fragment_source[] =
  55         "!!ARBfp1.0\n"
  56         "MOV    result.color, {0.0, 1.0, 0.0, 1.0};\n"
  57         "END"
  58         ;
  59
  60 /**
  61  * \name Handles to programs.
  62  */
  63 /*@{*/
  64 static GLint progs[TEST_COLS];
  65 static GLint frag_prog;
  66 /*@}*/
  67
  68
  69 static const GLfloat clear_color[4] = { 0.5, 0.5, 0.5, 1.0 };
  70
  71
  72 enum piglit_result
  73 piglit_display(void)
  74 {
  75         static const GLfloat color[4] = { 0.0, 1.0, 0.0, 1.0 };
  76         enum piglit_result result = PIGLIT_SUCCESS;
  77         unsigned i;
  78
  79         glClear(GL_COLOR_BUFFER_BIT);
  80
  81         for (i = 0; i < ELEMENTS(progs); i++) {
  82                 const int x = 1 + (i * (BOX_SIZE + 1));
  83
  84                 glBindProgramARB(GL_VERTEX_PROGRAM_ARB, progs[i]);
  85                 glEnable(GL_CLIP_PLANE0 + i);
  86                 piglit_draw_rect_tex(x, 1, BOX_SIZE, BOX_SIZE,
  87                                      1.0, 1.0, -2.0, 0.0);
  88                 glDisable(GL_CLIP_PLANE0 + i);
  89
  90                 if (!piglit_probe_pixel_rgb(x + (BOX_SIZE / 2),
  91                                             1 + (BOX_SIZE / 2),
  92                                             color)) {
  93                         result = PIGLIT_FAILURE;
  94                 }
  95         }
  96
  97         glutSwapBuffers();
  98         return result;
  99 }
 100
 101
 102 void
 103 piglit_init(int argc, char **argv)
 104 {
 105         unsigned i;
 106
 107         (void) argc;
 108         (void) argv;
 109
 110         piglit_require_vertex_program();
 111         piglit_require_fragment_program();
 112         piglit_require_extension("GL_NV_vertex_program2_option");
 113         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
 114
 115         for (i = 0; i < ELEMENTS(progs); i++) {
 116                 char shader_source[1024];
 117
 118                 snprintf(shader_source, sizeof(shader_source),
 119                          vertex_source_template, i);
 120
 121                 progs[i] = piglit_compile_program(GL_VERTEX_PROGRAM_ARB,
 122                                                   shader_source);
 123         }
 124
 125         glEnable(GL_FRAGMENT_PROGRAM_ARB);
 126         glEnable(GL_VERTEX_PROGRAM_ARB);
 127
 128         frag_prog = piglit_compile_program(GL_FRAGMENT_PROGRAM_ARB,
 129                                            fragment_source);
 130         glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, frag_prog);
 131
 132         glClearColor(clear_color[0],
 133                      clear_color[1],
 134                      clear_color[2],
 135                      clear_color[3]);
 136 }