tests/spec/arb_draw_elements_base_vertex/multidrawelements.c

   1 /*
   2  * Copyright © 2013 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 /** @file multi-draw-elements-base-vertex.c
  25  *
  26  * Section 2.8.2(Vertex Arrays) From GL spec 3.2 core:
  27  * glMultiDrawElementsBaseVertex was added.
  28  *
  29  *
  30  *    (0)-------(1)    Set up indices for quad 1 and 3.
  31  *     |    1    |
  32  *    (2)-------(3)    Use a basevertex of 2 to shift
  33  *     |    2    |     indices from quad 1 to 2 and
  34  *    (4)-------(5)    from quad 3 to 4
  35  *     |    3    |
  36  *    (6)-------(7)    End result 1 and 3 should be
  37  *     |    4    |     blue while 2 and 4 are green.
  38  *    (8)-------(9)
  39  *
  40  *
  41  * MultiDrawElementsBaseVertex behaves identically to
  42  * DrawElementsBaseVertex, except that primcount separate
  43  * lists of elements are specified instead. It has the
  44  * same effect as:
  45  *
  46  * for (int i = 0; i < primcount ; i++)
  47  *     if (count[i] > 0)
  48  *         DrawElementsBaseVertex(mode, count[i], type,
  49  *                               indices[i], basevertex[i]);
  50  *
  51  */
  52
  53 #include "piglit-util-gl.h"
  54
  55 PIGLIT_GL_TEST_CONFIG_BEGIN
  56
  57         config.supports_gl_compat_version = 10;
  58
  59         config.window_width  = 200;
  60         config.window_height = 200;
  61         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  62         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  63
  64 PIGLIT_GL_TEST_CONFIG_END
  65
  66 const char *vs_source = {
  67         "#version 130\n"
  68         "in vec2 vertex;\n"
  69         "void main() {\n"
  70         "       gl_Position = vec4(vertex.xy, 0, 1);\n"
  71         "}\n"
  72 };
  73
  74 const char *fs_source = {
  75         "#version 130\n"
  76         "void main() {\n"
  77         "       gl_FragColor = vec4(0, 1, 0, 1);\n"
  78         "}\n"
  79 };
  80
  81 static GLuint vao;
  82 static GLuint vertexBuffer;
  83 static GLuint indexBuffer;
  84
  85 /*
  86  * sets of two (x,y)
  87  */
  88 static GLfloat vertices[] = {
  89         -1.0, 1.0,
  90          1.0, 1.0,
  91         -1.0, 0.5,
  92          1.0, 0.5,
  93         -1.0, 0.0,
  94          1.0, 0.0,
  95         -1.0,-0.5,
  96          1.0,-0.5,
  97         -1.0,-1.0,
  98          1.0,-1.0
  99 };
 100 static GLsizei vertices_size = sizeof(vertices);
 101
 102 static GLuint indices[] = {
 103         0, 1, 2, 1, 2, 3, /* top square */
 104         4, 5, 6, 5, 6, 7, /* bot square */
 105 };
 106 static GLsizei indices_size = sizeof(indices);
 107
 108 static const uintptr_t indices_offset[] = {
 109         0, 6 * sizeof(GLuint)
 110 };
 111 static GLsizei indices_count[] = {
 112         6, 6
 113 };
 114
 115 static GLint basevertex[] = { 2, 2 };
 116 static bool indirect;
 117
 118 void
 119 piglit_init(int argc, char **argv)
 120 {
 121         for (int i = 1; i < argc; i++) {
 122                 if (strcmp(argv[i], "-indirect") == 0) {
 123                         piglit_require_extension("GL_ARB_multi_draw_indirect");
 124                         puts("Testing GL_ARB_multi_draw_indirect");
 125                         indirect = true;
 126                 }
 127         }
 128
 129         GLuint program;
 130         GLuint vertex_index;
 131
 132         piglit_require_GLSL_version(130);
 133
 134         if (piglit_get_gl_version() < 32) {
 135                 piglit_require_extension("GL_ARB_draw_elements_base_vertex");
 136         }
 137
 138         /* Create program */
 139         program = piglit_build_simple_program(vs_source, fs_source);
 140         glUseProgram(program);
 141
 142         /* Retrieve index from vs */
 143         vertex_index = glGetAttribLocation(program, "vertex");
 144         glEnableVertexAttribArray(vertex_index);
 145
 146         /* Gen vertex array buffer */
 147         if (indirect) {
 148                 /* Use non-VBO attributes to test this codepath. */
 149                 glVertexAttribPointer(vertex_index, 2, GL_FLOAT, GL_FALSE, 0, vertices);
 150         } else {
 151                 glGenBuffers(1, &vertexBuffer);
 152                 glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
 153                 glBufferData(GL_ARRAY_BUFFER, vertices_size, vertices, GL_STATIC_DRAW);
 154
 155                 glVertexAttribPointer(vertex_index, 2, GL_FLOAT, GL_FALSE, 0, 0);
 156         }
 157
 158         /* Gen indices array buffer */
 159         glGenBuffers(1, &indexBuffer);
 160         glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuffer);
 161         glBufferData(GL_ELEMENT_ARRAY_BUFFER, indices_size,
 162                      indices, GL_STATIC_DRAW);
 163
 164         if(!piglit_check_gl_error(GL_NO_ERROR))
 165                 piglit_report_result(PIGLIT_FAIL);
 166 }
 167
 168 enum piglit_result
 169 piglit_display(void)
 170 {
 171         bool pass = true;
 172         float green[] = {0, 1, 0};
 173         float blue[]  = {0, 0, 1};
 174
 175         glClearColor(blue[0], blue[1], blue[2], 1.0);
 176         glClear(GL_COLOR_BUFFER_BIT);
 177
 178         glBindVertexArray(vao);
 179         glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuffer);
 180
 181         if (indirect) {
 182                 unsigned data[2 * 5];
 183
 184                 for (unsigned i = 0; i < 2; i++) {
 185                         data[i*5+0] = indices_count[i];
 186                         data[i*5+1] = 1;
 187                         data[i*5+2] = indices_offset[i] / sizeof(GLuint);
 188                         data[i*5+3] = basevertex[i];
 189                         data[i*5+4] = 0;
 190                 }
 191                 GLuint ib;
 192
 193                 glGenBuffers(1, &ib);
 194                 glBindBuffer(GL_DRAW_INDIRECT_BUFFER, ib);
 195                 glBufferData(GL_DRAW_INDIRECT_BUFFER, sizeof(data), data,
 196                              GL_STATIC_DRAW);
 197
 198                 glMultiDrawElementsIndirect(GL_TRIANGLES, GL_UNSIGNED_INT, NULL, 2, 0);
 199                 glDeleteBuffers(1, &ib);
 200         } else {
 201                 glMultiDrawElementsBaseVertex(GL_TRIANGLES, indices_count,
 202                                               GL_UNSIGNED_INT, (GLvoid*)indices_offset,
 203                                               2, basevertex);
 204         }
 205
 206         /* Check for test pass */
 207         pass = piglit_probe_pixel_rgb(100, 175, blue) && pass;
 208         pass = piglit_probe_pixel_rgb(100, 125, green) && pass;
 209         pass = piglit_probe_pixel_rgb(100,  75, blue) && pass;
 210         pass = piglit_probe_pixel_rgb(100,  25, green) && pass;
 211
 212         if(!piglit_check_gl_error(GL_NO_ERROR))
 213                 pass = false;
 214
 215         piglit_present_results();
 216
 217         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 218 }