tests/spec/arb_indirect_parameters/tf-count-arrays.c

   1 /*
   2  * Copyright (C) 2016 Ilia Mirkin
   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
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #include "piglit-util-gl.h"
  25
  26 PIGLIT_GL_TEST_CONFIG_BEGIN
  27
  28         config.supports_gl_core_version = 31;
  29         config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
  30         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  31
  32 PIGLIT_GL_TEST_CONFIG_END
  33
  34 static const char *vs_tf =
  35         "#version 140\n"
  36         "out int tf;\n"
  37         "uniform int tf_val;\n"
  38         "void main() { gl_Position = vec4(0); tf = tf_val; }\n";
  39
  40 static const char *vs_draw =
  41         "#version 140\n"
  42         "out vec4 color;\n"
  43         "in vec4 piglit_vertex, in_color;\n"
  44         "void main() { gl_Position = piglit_vertex; color = in_color; }\n";
  45
  46 static const char *fs_draw =
  47         "#version 140\n"
  48         "out vec4 c;\n"
  49         "in vec4 color;\n"
  50         "void main() { c = color; }\n";
  51
  52 static GLint tf_prog, draw_prog;
  53 static GLint tf_val;
  54 static GLuint tf_vao, draw_vao;
  55
  56 void
  57 piglit_init(int argc, char **argv)
  58 {
  59         static const char *varying = "tf";
  60         static const unsigned cmds[] = {
  61                 4, 1, 0, 0,
  62                 4, 1, 4, 0,
  63                 4, 1, 8, 0,
  64         };
  65         static const struct {
  66                 float vertex_array[12 * 2];
  67                 float colors[12 * 4];
  68         } geometry = {
  69                 {
  70                         -1, -1,
  71                         0, -1,
  72                         0, 1,
  73                         -1, 1,
  74
  75                         0, -1,
  76                         1, -1,
  77                         1, 1,
  78                         0, 1,
  79
  80                         -1, -1,
  81                         1, -1,
  82                         1, 1,
  83                         -1, 1,
  84                 },
  85                 {
  86                         0, 1, 0, 1,
  87                         0, 1, 0, 1,
  88                         0, 1, 0, 1,
  89                         0, 1, 0, 1,
  90
  91                         0, 1, 1, 1,
  92                         0, 1, 1, 1,
  93                         0, 1, 1, 1,
  94                         0, 1, 1, 1,
  95
  96                         1, 0, 0, 0,
  97                         1, 0, 0, 0,
  98                         1, 0, 0, 0,
  99                         1, 0, 0, 0,
 100                 },
 101         };
 102
 103         GLuint vbo, dbo;
 104
 105         piglit_require_extension("GL_ARB_indirect_parameters");
 106
 107         tf_prog = piglit_build_simple_program_unlinked(vs_tf, NULL);
 108         draw_prog = piglit_build_simple_program(vs_draw, fs_draw);
 109
 110         glTransformFeedbackVaryings(tf_prog, 1, &varying,
 111                                     GL_INTERLEAVED_ATTRIBS);
 112         glLinkProgram(tf_prog);
 113         if (!piglit_link_check_status(tf_prog))
 114                 piglit_report_result(PIGLIT_FAIL);
 115         tf_val = glGetUniformLocation(tf_prog, "tf_val");
 116
 117         glGenVertexArrays(1, &tf_vao);
 118
 119         glGenVertexArrays(1, &draw_vao);
 120         glBindVertexArray(draw_vao);
 121
 122         glGenBuffers(1, &vbo);
 123         glBindBuffer(GL_ARRAY_BUFFER, vbo);
 124         glBufferData(GL_ARRAY_BUFFER, sizeof(geometry), &geometry, GL_STATIC_DRAW);
 125
 126         glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE,
 127                               2 * sizeof(GLfloat), NULL);
 128
 129         glVertexAttribPointer(1, 4, GL_FLOAT, GL_FALSE,
 130                               4 * sizeof(GLfloat), (void *)(12 * 2 * 4));
 131         glEnableVertexAttribArray(0);
 132         glEnableVertexAttribArray(1);
 133
 134         glGenBuffers(1, &dbo);
 135         glBindBuffer(GL_DRAW_INDIRECT_BUFFER, dbo);
 136         glBufferData(GL_DRAW_INDIRECT_BUFFER, sizeof(cmds), cmds, GL_STATIC_DRAW);
 137 }
 138
 139 enum piglit_result
 140 piglit_display(void)
 141 {
 142         GLuint xfb_buf;
 143         bool pass = true;
 144         unsigned *map;
 145
 146         static const float g[] = {0, 1, 0, 1};
 147         static const float gb[] = {0, 1, 1, 1};
 148
 149         glClearColor(0.2, 0.2, 0.2, 0.2);
 150         glClear(GL_COLOR_BUFFER_BIT);
 151
 152         glGenBuffers(1, &xfb_buf);
 153         glBindBuffer(GL_TRANSFORM_FEEDBACK_BUFFER, xfb_buf);
 154         glBufferData(GL_TRANSFORM_FEEDBACK_BUFFER, 8, NULL, GL_STATIC_READ);
 155
 156         glEnable(GL_RASTERIZER_DISCARD);
 157         glBindVertexArray(tf_vao);
 158         glUseProgram(tf_prog);
 159
 160         /* write a 2 into xfb_buf[0] */
 161         glBindBufferRange(GL_TRANSFORM_FEEDBACK_BUFFER, 0, xfb_buf, 0, 4);
 162         glUniform1i(tf_val, 2);
 163         glBeginTransformFeedback(GL_POINTS);
 164         glDrawArrays(GL_POINTS, 0, 1);
 165         glEndTransformFeedback();
 166
 167         /* write a 0 into xfb_buf[1] */
 168         glBindBufferRange(GL_TRANSFORM_FEEDBACK_BUFFER, 0, xfb_buf, 4, 4);
 169         glUniform1i(tf_val, 0);
 170         glBeginTransformFeedback(GL_POINTS);
 171         glDrawArrays(GL_POINTS, 0, 1);
 172         glEndTransformFeedback();
 173
 174         glDisable(GL_RASTERIZER_DISCARD);
 175         glBindVertexArray(draw_vao);
 176         glUseProgram(draw_prog);
 177
 178         /* Draw the g/gb halves */
 179         glBindBuffer(GL_PARAMETER_BUFFER_ARB, xfb_buf);
 180         glMultiDrawArraysIndirectCountARB(
 181                         GL_TRIANGLE_FAN,
 182                         0, 0, 2, 0);
 183
 184         pass &= piglit_probe_rect_rgba(0, 0, piglit_width / 2, piglit_height,
 185                                        g);
 186         pass &= piglit_probe_rect_rgba(piglit_width / 2, 0,
 187                                        piglit_width / 2, piglit_height,
 188                                        gb);
 189         if (!pass) {
 190                 printf("first draw failed\n");
 191                 goto end;
 192         }
 193
 194         /* Overdraw with the red quad, except count = 0 */
 195         glMultiDrawArraysIndirectCountARB(
 196                         GL_TRIANGLE_FAN,
 197                         (const void *) (2 * 4 * 4), 4, 1, 0);
 198
 199         pass &= piglit_probe_rect_rgba(0, 0, piglit_width / 2, piglit_height,
 200                                        g);
 201         pass &= piglit_probe_rect_rgba(piglit_width / 2, 0,
 202                                        piglit_width / 2, piglit_height,
 203                                        gb);
 204         if (!pass)
 205                 printf("second draw did something when it shouldn't have.\n");
 206
 207 end:
 208         piglit_present_results();
 209         map = glMapBuffer(GL_TRANSFORM_FEEDBACK_BUFFER, GL_READ_ONLY);
 210         if (map[0] != 2) {
 211                 printf("map[0] != 2\n");
 212                 pass = false;
 213         }
 214         if (map[1] != 0) {
 215                 printf("map[1] != 0\n");
 216                 pass = false;
 217         }
 218         glUnmapBuffer(GL_TRANSFORM_FEEDBACK_BUFFER);
 219         glDeleteBuffers(1, &xfb_buf);
 220         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 221 }