tests/spec/arb_shader_draw_parameters/drawid.c

   1 /*
   2  * Copyright © 2015 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
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   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
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 /**
  25  * \file drawid.c
  26  *
  27  * Basic test for gl_DrawIDARB.
  28  */
  29
  30 #include "piglit-util-gl.h"
  31
  32 PIGLIT_GL_TEST_CONFIG_BEGIN
  33
  34         config.supports_gl_core_version = 31;
  35         config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
  36
  37 PIGLIT_GL_TEST_CONFIG_END
  38
  39 static const char vs_template[] =
  40         "#version 140\n"
  41         "#extension GL_ARB_shader_draw_parameters: require\n"
  42         "\n"
  43         "in vec4 piglit_vertex;\n"
  44         "in ivec2 ref;\n"
  45         "out vec4 color;\n"
  46         "\n"
  47         "void main()\n"
  48         "{\n"
  49         "  gl_Position = piglit_vertex;\n"
  50         "  if (%s)\n"
  51         "    color = vec4(0, 1, 0, 1);\n"
  52         "  else\n"
  53         "    color = vec4(1, 0, 0, 1);\n"
  54         "}\n";
  55
  56 static const char fs_text[] =
  57         "#version 130\n"
  58         "\n"
  59         "in vec4 color;\n"
  60         "\n"
  61         "void main()\n"
  62         "{\n"
  63         "  gl_FragColor = color;\n"
  64         "}\n";
  65
  66 void
  67 piglit_init(int argc, char **argv)
  68 {
  69         GLuint prog;
  70         char *vs_text;
  71
  72         if (strcmp(argv[1], "drawid") == 0) {
  73                 (void)!asprintf(&vs_text, vs_template,
  74                          "ref.x == gl_DrawIDARB");
  75         } else if (strcmp(argv[1], "vertexid") == 0) {
  76                 (void)!asprintf(&vs_text, vs_template,
  77                          "ref.x == gl_DrawIDARB && ref.y == gl_VertexID");
  78         } else {
  79                 printf("Unknown subtest: %s\n", argv[1]);
  80                 piglit_report_result(PIGLIT_FAIL);
  81         }
  82
  83         piglit_require_extension("GL_ARB_shader_draw_parameters");
  84         piglit_require_extension("GL_ARB_base_instance");
  85
  86         prog = piglit_build_simple_program(vs_text, fs_text);
  87
  88         glBindAttribLocation(prog, 1, (const GLchar *) "ref");
  89         glLinkProgram(prog);
  90         glUseProgram(prog);
  91 }
  92
  93 enum piglit_result
  94 piglit_display()
  95 {
  96         bool pass;
  97
  98         struct {
  99                 float vertex_array[16];
 100                 int reference_array[16];
 101                 int indices[6];
 102         } geometry = {
 103                 .vertex_array = {
 104                         -1, -1,
 105                         0, -1,
 106                         0, 1,
 107                         -1, 1,
 108
 109                         0, -1,
 110                         1, -1,
 111                         1, 1,
 112                         0, 1,
 113                 },
 114                 .reference_array = {
 115                         0, 0,
 116                         0, 1,
 117                         0, 2,
 118                         0, 3,
 119
 120                         2, 4,
 121                         2, 5,
 122                         2, 6,
 123                         2, 7,
 124                 }
 125         };
 126
 127         const int indices[12] = {
 128                 0, 1, 2,
 129                 0, 2, 3,
 130
 131                 4, 5, 6,
 132                 4, 6, 7,
 133         };
 134
 135         float green[] = {0, 1, 0, 1};
 136
 137         GLuint vao, vbo;
 138         glGenVertexArrays(1, &vao);
 139         glBindVertexArray(vao);
 140
 141         glGenBuffers(1, &vbo);
 142         glBindBuffer(GL_ARRAY_BUFFER, vbo);
 143         glBufferData(GL_ARRAY_BUFFER, sizeof(geometry), &geometry, GL_STATIC_DRAW);
 144
 145         glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE,
 146                               2 * sizeof(GLfloat),
 147                               (void *) ((char *) &geometry.vertex_array - (char *) &geometry));
 148
 149         glVertexAttribIPointer(1, 2, GL_UNSIGNED_INT,
 150                                2 * sizeof(int),
 151                                (void *) ((char *) &geometry.reference_array - (char *) &geometry));
 152
 153         /* Enable the attributes */
 154         glEnableVertexAttribArray(0);
 155         glEnableVertexAttribArray(1);
 156
 157         static const GLsizei counts[4] = { 6, 0, 6, 0 };
 158         const int *indices_array[4] = { &indices[0], &indices[0], &indices[6], &indices[6] };
 159
 160         glMultiDrawElements(GL_TRIANGLES,
 161                             counts,
 162                             GL_UNSIGNED_INT,
 163                             (const void **) indices_array,
 164                             ARRAY_SIZE(counts));
 165
 166         pass = piglit_probe_rect_rgba(0, 0, piglit_width, piglit_height,
 167                                       green);
 168
 169         piglit_present_results();
 170
 171         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 172 }