tests/general/clear-varray-2.0.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  * Authors:
  24  *    Eric Anholt <eric@anholt.net>
  25  *
  26  */
  27
  28 /** @file clear-varray-2.0.c
  29  *
  30  * Tests that enabling 2.0's vertex attributes doesn't interfere with glClear.
  31  *
  32  * fd.o bug #21638
  33  */
  34
  35 #include "piglit-util-gl.h"
  36
  37 PIGLIT_GL_TEST_CONFIG_BEGIN
  38
  39         config.supports_gl_compat_version = 10;
  40
  41         config.window_width = 200;
  42         config.window_height = 100;
  43         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_DEPTH;
  44
  45 PIGLIT_GL_TEST_CONFIG_END
  46
  47 /* apply MVP and set the color to blue. */
  48 static const GLchar *const vp_code =
  49         "!!ARBvp1.0\n"
  50         "PARAM mvp[4] = { state.matrix.mvp };\n"
  51         "DP4 result.position.x, mvp[0], vertex.attrib[0];\n"
  52         "DP4 result.position.y, mvp[1], vertex.attrib[0];\n"
  53         "DP4 result.position.z, mvp[2], vertex.attrib[0];\n"
  54         "DP4 result.position.w, mvp[3], vertex.attrib[0];\n"
  55         "MOV result.color, {0, 0, 1, 0};\n"
  56         "END"
  57         ;
  58
  59 static const GLchar *const fp_code =
  60         "!!ARBfp1.0\n"
  61         "MOV    result.color, fragment.color;\n"
  62         "END"
  63         ;
  64
  65 enum piglit_result
  66 piglit_display(void)
  67 {
  68         GLboolean pass = GL_TRUE;
  69         float vertices[4][4];
  70         int i;
  71         float green[4] = {0, 1, 0, 0};
  72         float blue[4] =  {0, 0, 1, 0};
  73
  74         vertices[0][0] = 10;
  75         vertices[0][1] = 10;
  76         vertices[0][2] = 0;
  77         vertices[0][3] = 1;
  78
  79         vertices[1][0] = 20;
  80         vertices[1][1] = 10;
  81         vertices[1][2] = 0;
  82         vertices[1][3] = 1;
  83
  84         vertices[2][0] = 20;
  85         vertices[2][1] = 20;
  86         vertices[2][2] = 0;
  87         vertices[2][3] = 1;
  88
  89         vertices[3][0] = 10;
  90         vertices[3][1] = 20;
  91         vertices[3][2] = 0;
  92         vertices[3][3] = 1;
  93
  94         /* Clear red. */
  95         glClearColor(1.0, 0.0, 0.0, 0.0);
  96         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  97
  98         /* Draw a blue rect at (10,10)-(20,20) */
  99         glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 4 * sizeof(float),
 100                               vertices);
 101         glEnableVertexAttribArray(0);
 102
 103         glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
 104
 105         /* Clear everything to green. Note that we left the attr enabled*/
 106         glClearColor(0.0, 1.0, 0.0, 0.0);
 107         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 108
 109         /* Draw a blue rect at (30,10)-(40,20) */
 110         for (i = 0; i < 4; i++)
 111                 vertices[i][0] += 20;
 112         glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
 113
 114         /* The second clear should have made everything green. */
 115         pass = pass && piglit_probe_pixel_rgb(30, 30, green);
 116         /* The first rectangle should have been cleared to green. */
 117         pass = pass && piglit_probe_pixel_rgb(15, 15, green);
 118         /* The second rectangle should have shown blue. */
 119         pass = pass && piglit_probe_pixel_rgb(35, 15, blue);
 120
 121         piglit_present_results();
 122
 123         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 124 }
 125
 126 static void reshape(int width, int height)
 127 {
 128         glViewport(0, 0, width, height);
 129         piglit_ortho_projection(width, height, GL_FALSE);
 130 }
 131
 132 void
 133 piglit_init(int argc, char **argv)
 134 {
 135         GLuint vert_prog, frag_prog;
 136
 137         piglit_require_gl_version(20);
 138
 139         reshape(piglit_width, piglit_height);
 140
 141         piglit_require_extension("GL_ARB_fragment_program");
 142         piglit_require_extension("GL_ARB_vertex_program");
 143
 144         glGenProgramsARB(1, &vert_prog);
 145         glBindProgramARB(GL_VERTEX_PROGRAM_ARB, vert_prog);
 146         glProgramStringARB(GL_VERTEX_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
 147                            strlen(vp_code), vp_code);
 148
 149         glGenProgramsARB(1, &frag_prog);
 150         glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, frag_prog);
 151         glProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
 152                            strlen(fp_code), fp_code);
 153
 154         glEnable(GL_VERTEX_PROGRAM_ARB);
 155         glEnable(GL_FRAGMENT_PROGRAM_ARB);
 156 }