tests/spec/arb_shader_storage_buffer_object/rendering.c

   1 /*
   2  * Copyright (c) 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
   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 /** @file rendering.c
  25  *
  26  * Test rendering with SSBOs.  We draw four squares with different positions,
  27  * sizes, rotations and colors where those parameters come from SSBOs.
  28  *
  29  * Based on GL_ARB_uniform_buffer_object's rendering.c
  30  */
  31
  32 #include "piglit-util-gl.h"
  33
  34 PIGLIT_GL_TEST_CONFIG_BEGIN
  35
  36         config.supports_gl_compat_version = 32;
  37         config.supports_gl_core_version = 32;
  38         config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
  39         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  40
  41 PIGLIT_GL_TEST_CONFIG_END
  42
  43 static const char vert_shader_text[] =
  44         "#version 130\n"
  45         "#extension GL_ARB_shader_storage_buffer_object : require\n"
  46         "\n"
  47         "buffer ssbo_pos_size { vec2 pos; float size; };\n"
  48         "buffer ssbo_rot {float rotation; };\n"
  49         "in vec4 piglit_vertex;\n"
  50         "\n"
  51         "void main()\n"
  52         "{\n"
  53         "   mat2 m;\n"
  54         "   m[0][0] = m[1][1] = cos(rotation); \n"
  55         "   m[0][1] = sin(rotation); \n"
  56         "   m[1][0] = -m[0][1]; \n"
  57         "   gl_Position.xy = m * piglit_vertex.xy * vec2(size) + pos;\n"
  58         "   gl_Position.zw = vec2(0, 1);\n"
  59         "}\n";
  60
  61 static const char vert_shader_no_ssbo_text[] =
  62         "#version 130\n"
  63         "#extension GL_ARB_uniform_buffer_object : require\n"
  64         "\n"
  65         "layout(std140) uniform;\n"
  66         "uniform ub_pos_size { vec2 pos; float size; };\n"
  67         "uniform ub_rot {float rotation; };\n"
  68         "in vec4 piglit_vertex;\n"
  69         "\n"
  70         "void main()\n"
  71         "{\n"
  72         "   mat2 m;\n"
  73         "   m[0][0] = m[1][1] = cos(rotation); \n"
  74         "   m[0][1] = sin(rotation); \n"
  75         "   m[1][0] = -m[0][1]; \n"
  76         "   gl_Position.xy = m * piglit_vertex.xy * vec2(size) + pos;\n"
  77         "   gl_Position.zw = vec2(0, 1);\n"
  78         "}\n";
  79
  80 static const char frag_shader_text[] =
  81         "#version 130\n"
  82         "#extension GL_ARB_shader_storage_buffer_object : require\n"
  83         "\n"
  84         "buffer ssbo_color { vec4 color; float color_scale; };\n"
  85         "\n"
  86         "void main()\n"
  87         "{\n"
  88         "   gl_FragColor = color * color_scale;\n"
  89         "}\n";
  90
  91 #define NUM_SQUARES 4
  92 #define NUM_SSBOS 3
  93
  94 /* Square positions and sizes */
  95 static const float pos_size[NUM_SQUARES][3] = {
  96         { -0.5, -0.5, 0.1 },
  97         {  0.5, -0.5, 0.2 },
  98         { -0.5, 0.5, 0.3 },
  99         {  0.5, 0.5, 0.4 }
 100 };
 101
 102 /* Square color and color_scales */
 103 static const float color[NUM_SQUARES][8] = {
 104         { 2.0, 0.0, 0.0, 1.0,   0.50, 0.0, 0.0, 0.0 },
 105         { 0.0, 4.0, 0.0, 1.0,   0.25, 0.0, 0.0, 0.0 },
 106         { 0.0, 0.0, 5.0, 1.0,   0.20, 0.0, 0.0, 0.0 },
 107         { 0.2, 0.2, 0.2, 0.2,   5.00, 0.0, 0.0, 0.0 }
 108 };
 109
 110 /* Square rotations */
 111 static const float rotation[NUM_SQUARES] = {
 112         0.0,
 113         0.1,
 114         0.2,
 115         0.3
 116 };
 117
 118 static GLuint prog;
 119 static GLuint buffers[NUM_SSBOS];
 120 static GLint alignment, ubo_alignment;
 121 static bool test_buffer_offset = false;
 122 static bool vertex_ssbo = false;
 123
 124 static void
 125 setup_ubos(void)
 126 {
 127         static const char *names[NUM_SSBOS] = {
 128                 "ssbo_pos_size",
 129                 "ssbo_color",
 130                 "ssbo_rot"
 131         };
 132         static const char *ubo_names[NUM_SSBOS] = {
 133                 "ub_pos_size",
 134                 "ssbo_color",
 135                 "ub_rot"
 136         };
 137
 138         bool vs_ubo[NUM_SSBOS] = {true, false, true};
 139         static GLubyte zeros[1000] = {0};
 140         int i;
 141
 142         glGetIntegerv(GL_SHADER_STORAGE_BUFFER_OFFSET_ALIGNMENT, &alignment);
 143         printf("GL_SHADER_STORAGE_BUFFER_OFFSET_ALIGNMENT = %d\n", alignment);
 144
 145         if (!vertex_ssbo) {
 146                 glGetIntegerv(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT, &ubo_alignment);
 147                 printf("GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT = %d\n", ubo_alignment);
 148         }
 149         if (test_buffer_offset) {
 150                 printf("Testing buffer offset %d\n", alignment);
 151         }
 152         else {
 153                 /* we use alignment as the offset */
 154                 alignment = 0;
 155         }
 156
 157         glGenBuffers(NUM_SSBOS, buffers);
 158
 159         for (i = 0; i < NUM_SSBOS; i++) {
 160                 GLint index, size;
 161
 162                 if (!vertex_ssbo && vs_ubo[i]) {
 163                         /* query UBO index */
 164                         index = glGetUniformBlockIndex(prog, ubo_names[i]);
 165
 166                         /* query UBO size */
 167                         glGetActiveUniformBlockiv(prog, index,
 168                                                   GL_UNIFORM_BLOCK_DATA_SIZE, &size);
 169                         printf("UBO %s: index = %d, size = %d\n",
 170                                ubo_names[i], index, size);
 171
 172                         /* Allocate UBO */
 173                         /* XXX for some reason, this test doesn't work at all with
 174                          * nvidia if we pass NULL instead of zeros here.  The UBO data
 175                          * is set/overwritten in the piglit_display() function so this
 176                          * really shouldn't matter.
 177                          */
 178                         glBindBuffer(GL_UNIFORM_BUFFER, buffers[i]);
 179                         glBufferData(GL_UNIFORM_BUFFER, size + alignment,
 180                                      zeros, GL_DYNAMIC_DRAW);
 181
 182                         /* Attach UBO */
 183                         glBindBufferRange(GL_UNIFORM_BUFFER, i, buffers[i],
 184                                           alignment,  /* offset */
 185                                           size);
 186                         glUniformBlockBinding(prog, index, i);
 187                 } else {
 188                         /* query SSBO index */
 189                         index = glGetProgramResourceIndex(prog,
 190                                                           GL_SHADER_STORAGE_BLOCK,
 191                                                           names[i]);
 192
 193                         GLenum prop = GL_BUFFER_DATA_SIZE;
 194                         /* query SSBO size */
 195                         glGetProgramResourceiv(prog, GL_SHADER_STORAGE_BLOCK, index,
 196                                                1, &prop, 1, NULL, &size);
 197                         printf("SSBO %s: index = %d, size = %d\n",
 198                                names[i], index, size);
 199
 200                         /* Allocate SSBO */
 201                         glBindBuffer(GL_SHADER_STORAGE_BUFFER, buffers[i]);
 202                         glBufferData(GL_SHADER_STORAGE_BUFFER, size + alignment,
 203                                      zeros, GL_DYNAMIC_DRAW);
 204
 205                         /* Attach SSBO */
 206                         glBindBufferRange(GL_SHADER_STORAGE_BUFFER, i, buffers[i],
 207                                           alignment,  /* offset */
 208                                           size);
 209                         glShaderStorageBlockBinding(prog, index, i);
 210                 }
 211
 212                 if (!piglit_check_gl_error(GL_NO_ERROR))
 213                         piglit_report_result(PIGLIT_FAIL);
 214         }
 215 }
 216
 217
 218 void
 219 piglit_init(int argc, char **argv)
 220 {
 221         int num_vertex_ssbo = 0;
 222
 223         piglit_require_extension("GL_ARB_shader_storage_buffer_object");
 224         piglit_require_extension("GL_ARB_program_interface_query");
 225
 226         if (argc > 1 && strcmp(argv[1], "offset") == 0) {
 227                 test_buffer_offset = true;
 228         }
 229
 230         glGetIntegerv(GL_MAX_VERTEX_SHADER_STORAGE_BLOCKS, &num_vertex_ssbo);
 231
 232         if (num_vertex_ssbo == 0)
 233                 vertex_ssbo = false;
 234
 235         glViewport(0, 0, piglit_width, piglit_height);
 236
 237         prog = piglit_build_simple_program(vertex_ssbo ? vert_shader_text : vert_shader_no_ssbo_text, frag_shader_text);
 238         assert(prog);
 239         glUseProgram(prog);
 240
 241         setup_ubos();
 242
 243         glClearColor(0.2, 0.2, 0.2, 0.2);
 244 }
 245
 246
 247 static bool
 248 probe(int x, int y, int color_index)
 249 {
 250         float expected[4];
 251
 252         /* mul color by color_scale */
 253         expected[0] = color[color_index][0] * color[color_index][4];
 254         expected[1] = color[color_index][1] * color[color_index][4];
 255         expected[2] = color[color_index][2] * color[color_index][4];
 256         expected[3] = color[color_index][3] * color[color_index][4];
 257
 258         return piglit_probe_pixel_rgba(x, y, expected);
 259 }
 260
 261
 262 enum piglit_result
 263 piglit_display(void)
 264 {
 265         bool pass = true;
 266         int x0 = piglit_width / 4;
 267         int x1 = piglit_width * 3 / 4;
 268         int y0 = piglit_height / 4;
 269         int y1 = piglit_height * 3 / 4;
 270         int i;
 271
 272         glViewport(0, 0, piglit_width, piglit_height);
 273
 274         glClear(GL_COLOR_BUFFER_BIT);
 275
 276         for (i = 0; i < NUM_SQUARES; i++) {
 277                 /* Load UBO data, at offset=alignment */
 278                 if (!vertex_ssbo) {
 279                         glBindBuffer(GL_UNIFORM_BUFFER, buffers[0]);
 280                         glBufferSubData(GL_UNIFORM_BUFFER, alignment, sizeof(pos_size[0]),
 281                                         pos_size[i]);
 282                 } else {
 283                         glBindBuffer(GL_SHADER_STORAGE_BUFFER, buffers[0]);
 284                         glBufferSubData(GL_SHADER_STORAGE_BUFFER, alignment,
 285                                         sizeof(pos_size[0]), pos_size[i]);
 286                 }
 287                 glBindBuffer(GL_SHADER_STORAGE_BUFFER, buffers[1]);
 288                 glBufferSubData(GL_SHADER_STORAGE_BUFFER, alignment,
 289                                 sizeof(color[0]), color[i]);
 290                 if (!vertex_ssbo) {
 291                         glBindBuffer(GL_UNIFORM_BUFFER, buffers[2]);
 292                         glBufferSubData(GL_UNIFORM_BUFFER, alignment, sizeof(rotation[0]),
 293                                         &rotation[i]);
 294                 } else {
 295                         glBindBuffer(GL_SHADER_STORAGE_BUFFER, buffers[2]);
 296                         glBufferSubData(GL_SHADER_STORAGE_BUFFER, alignment,
 297                                         sizeof(rotation[0]), &rotation[i]);
 298                 }
 299
 300                 if (!piglit_check_gl_error(GL_NO_ERROR))
 301                         return PIGLIT_FAIL;
 302
 303                 piglit_draw_rect(-1, -1, 2, 2);
 304         }
 305
 306         pass = probe(x0, y0, 0) && pass;
 307         pass = probe(x1, y0, 1) && pass;
 308         pass = probe(x0, y1, 2) && pass;
 309         pass = probe(x1, y1, 3) && pass;
 310
 311         piglit_present_results();
 312
 313         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 314 }