tests/spec/arb_uniform_buffer_object/rendering-dsa.c

   1 /*
   2  * Copyright (c) 2014 VMware, Inc.
   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-dsa.c
  25  *
  26  * Test rendering with UBOs.  We draw four squares with different positions,
  27  * sizes, rotations and colors where those parameters come from UBOs.
  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_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
  36         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  37
  38 PIGLIT_GL_TEST_CONFIG_END
  39
  40 static const char vert_shader_text[] =
  41         "#version 140\n"
  42         "in vec4 piglit_vertex;\n"
  43         "layout(std140) uniform;\n"
  44         "uniform ub_pos_size { vec2 pos; float size; };\n"
  45         "uniform ub_rot {float rotation; };\n"
  46         "\n"
  47         "void main()\n"
  48         "{\n"
  49         "   mat2 m;\n"
  50         "   m[0][0] = m[1][1] = cos(rotation); \n"
  51         "   m[0][1] = sin(rotation); \n"
  52         "   m[1][0] = -m[0][1]; \n"
  53         "   gl_Position.xy = m * piglit_vertex.xy * vec2(size) + pos;\n"
  54         "   gl_Position.zw = vec2(0, 1);\n"
  55         "}\n";
  56
  57 static const char frag_shader_text[] =
  58         "#version 140\n"
  59         "layout(std140) uniform;\n"
  60         "uniform ub_color { vec4 color; float color_scale; };\n"
  61         "out vec4 col;\n"
  62         "\n"
  63         "void main()\n"
  64         "{\n"
  65         "   col = color * color_scale;\n"
  66         "}\n";
  67
  68 #define NUM_SQUARES 4
  69 #define NUM_UBOS 3
  70
  71 /* Square positions and sizes */
  72 static const float pos_size[NUM_SQUARES][3] = {
  73         { -0.5, -0.5, 0.1 },
  74         {  0.5, -0.5, 0.2 },
  75         { -0.5, 0.5, 0.3 },
  76         {  0.5, 0.5, 0.4 }
  77 };
  78
  79 /* Square color and color_scales */
  80 static const float color[NUM_SQUARES][8] = {
  81         { 2.0, 0.0, 0.0, 1.0,   0.50, 0.0, 0.0, 0.0 },
  82         { 0.0, 4.0, 0.0, 1.0,   0.25, 0.0, 0.0, 0.0 },
  83         { 0.0, 0.0, 5.0, 1.0,   0.20, 0.0, 0.0, 0.0 },
  84         { 0.2, 0.2, 0.2, 0.2,   5.00, 0.0, 0.0, 0.0 }
  85 };
  86
  87 /* Square rotations */
  88 static const float rotation[NUM_SQUARES] = {
  89         0.0,
  90         0.1,
  91         0.2,
  92         0.3
  93 };
  94
  95 static GLuint prog;
  96 static GLuint buffers[NUM_UBOS];
  97 static GLint alignment;
  98 static bool test_buffer_offset = false;
  99
 100
 101 static void
 102 setup_ubos(void)
 103 {
 104         static const char *names[NUM_UBOS] = {
 105                 "ub_pos_size",
 106                 "ub_color",
 107                 "ub_rot"
 108         };
 109         int i;
 110
 111         glGetIntegerv(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT, &alignment);
 112         printf("GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT = %d\n", alignment);
 113
 114         if (test_buffer_offset) {
 115                 printf("Testing buffer offset %d\n", alignment);
 116         }
 117         else {
 118                 /* we use alignment as the offset */
 119                 alignment = 0;
 120         }
 121
 122         glCreateBuffers(NUM_UBOS, buffers);
 123
 124         for (i = 0; i < NUM_UBOS; i++) {
 125                 GLint index, size;
 126
 127                 /* query UBO index */
 128                 index = glGetUniformBlockIndex(prog, names[i]);
 129
 130                 /* query UBO size */
 131                 glGetActiveUniformBlockiv(prog, index,
 132                                           GL_UNIFORM_BLOCK_DATA_SIZE, &size);
 133
 134                 printf("UBO %s: index = %d, size = %d\n",
 135                        names[i], index, size);
 136
 137                 /* Allocate UBO */
 138                 glNamedBufferData(buffers[i], size + alignment,
 139                                   NULL, GL_DYNAMIC_DRAW);
 140
 141                 /* Attach UBO */
 142                 glBindBufferRange(GL_UNIFORM_BUFFER, i, buffers[i],
 143                                   alignment,  /* offset */
 144                                   size);
 145                 glUniformBlockBinding(prog, index, i);
 146
 147                 if (!piglit_check_gl_error(GL_NO_ERROR))
 148                         piglit_report_result(PIGLIT_FAIL);
 149         }
 150 }
 151
 152
 153 void
 154 piglit_init(int argc, char **argv)
 155 {
 156         piglit_require_extension("GL_ARB_direct_state_access");
 157
 158         if (argc > 1 && strcmp(argv[1], "offset") == 0) {
 159                 test_buffer_offset = true;
 160         }
 161
 162         prog = piglit_build_simple_program(vert_shader_text, frag_shader_text);
 163         assert(prog);
 164         glUseProgram(prog);
 165
 166         setup_ubos();
 167
 168         glClearColor(0.2, 0.2, 0.2, 0.2);
 169 }
 170
 171
 172 static bool
 173 probe(int x, int y, int color_index)
 174 {
 175         float expected[4];
 176
 177         /* mul color by color_scale */
 178         expected[0] = color[color_index][0] * color[color_index][4];
 179         expected[1] = color[color_index][1] * color[color_index][4];
 180         expected[2] = color[color_index][2] * color[color_index][4];
 181         expected[3] = color[color_index][3] * color[color_index][4];
 182
 183         return piglit_probe_pixel_rgba(x, y, expected);
 184 }
 185
 186
 187 enum piglit_result
 188 piglit_display(void)
 189 {
 190         bool pass = true;
 191         int x0 = piglit_width / 4;
 192         int x1 = piglit_width * 3 / 4;
 193         int y0 = piglit_height / 4;
 194         int y1 = piglit_height * 3 / 4;
 195         int i;
 196
 197         glViewport(0, 0, piglit_width, piglit_height);
 198
 199         glClear(GL_COLOR_BUFFER_BIT);
 200
 201         for (i = 0; i < NUM_SQUARES; i++) {
 202                 /* Load UBO data, at offset=alignment */
 203                 glNamedBufferSubData(buffers[0], alignment, sizeof(pos_size[0]),
 204                                      pos_size[i]);
 205                 glNamedBufferSubData(buffers[1], alignment, sizeof(color[0]),
 206                                      color[i]);
 207                 glNamedBufferSubData(buffers[2], alignment, sizeof(rotation[0]),
 208                                      &rotation[i]);
 209
 210                 if (!piglit_check_gl_error(GL_NO_ERROR))
 211                         return PIGLIT_FAIL;
 212
 213                 piglit_draw_rect(-1, -1, 2, 2);
 214         }
 215
 216         pass = probe(x0, y0, 0) && pass;
 217         pass = probe(x1, y0, 1) && pass;
 218         pass = probe(x0, y1, 2) && pass;
 219         pass = probe(x1, y1, 3) && pass;
 220
 221         piglit_present_results();
 222
 223         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 224 }