tests/spec/arb_fragment_shader_interlock/image-load-store.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 #include "piglit-util-gl.h"
  25
  26 /*
  27  * A test to check whether GL_ARB_fragment_shader_interlock operates as
  28  * expected. This test simulates blending behaviour by using image loads/stores
  29  * to a 3D texture. The blending formula used is:
  30  * result = current_alpha * current_color + (1 - current_alpha) * previous_color
  31  * Multisampling is also enabled and tested at 2, 4, 8 and 16.
  32  */
  33
  34 PIGLIT_GL_TEST_CONFIG_BEGIN
  35         config.supports_gl_compat_version = 42;
  36         config.supports_gl_core_version = 42;
  37         config.window_width = 100;
  38         config.window_height = 100;
  39         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DEPTH |
  40                 PIGLIT_GL_VISUAL_DOUBLE;
  41 PIGLIT_GL_TEST_CONFIG_END
  42
  43 static GLuint prog, vao, tex_frame, tex_blend, fbo;
  44
  45 static GLuint
  46 make_fbo(void)
  47 {
  48         GLuint fbo;
  49         glGenFramebuffers(1, &fbo);
  50         glBindFramebuffer(GL_FRAMEBUFFER, fbo );
  51         glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, tex_frame);
  52         glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
  53                 GL_TEXTURE_2D_MULTISAMPLE, tex_frame, 0);
  54
  55         return fbo;
  56 }
  57
  58 static GLuint
  59 make_shader_program(void)
  60 {
  61         static const char *vs_text =
  62                 "#version 430\n"
  63                 "layout(location = 0) in vec4 pos_in;\n"
  64                 "layout(location = 1) in vec4 col_in;\n"
  65                 "smooth out vec4 col_vary;\n"
  66                 "void main()\n"
  67                 "{\n"
  68                 "       gl_Position = pos_in;\n"
  69                 "       col_vary = col_in;\n"
  70                 "}\n";
  71
  72         static const char *fs_text =
  73                 "#version 430\n"
  74                 "#extension GL_ARB_fragment_shader_interlock: require\n"
  75                 "layout(pixel_interlock_ordered) in;\n"
  76                 "layout(rgba32f, binding = 0) uniform image3D img_output;\n"
  77                 "layout(location = 1) uniform int sample_rate;\n"
  78                 "smooth in vec4 col_vary;\n"
  79                 "out vec4 col_out;\n"
  80                 "void main()\n"
  81                 "{\n"
  82                 "       vec4 result = vec4(0.0, 0.0, 0.0, 1.0);\n"
  83                 "       ivec3 current_sample_coord = ivec3(gl_FragCoord.x, gl_FragCoord.y, gl_SampleID);\n"
  84                 "       ivec3 result_coord = ivec3(gl_FragCoord.x, gl_FragCoord.y, sample_rate);\n"
  85                 "       int i;\n"
  86                 "       beginInvocationInterlockARB();\n"
  87                 "       vec4 current_sample_color = imageLoad(img_output, current_sample_coord);\n"
  88                 "       result.rgb += col_vary.a * col_vary.rgb + (1 - col_vary.a) * current_sample_color.rgb;\n"
  89                 "       imageStore(img_output, current_sample_coord, result);\n"
  90                 "\n"
  91                 "       for (i = 0; i < sample_rate; i++) {\n"
  92                 "               if (i != gl_SampleID) {\n"
  93                 "                       ivec3 sample_coord = ivec3(gl_FragCoord.x, gl_FragCoord.y, i);\n"
  94                 "                       vec4 sample_color = imageLoad(img_output, sample_coord);\n"
  95                 "                       result.rgb += sample_color.rgb;\n"
  96                 "               }\n"
  97                 "       }\n"
  98                 "       result.rgb /= sample_rate;\n"
  99                 "       imageStore(img_output, result_coord, result);\n"
 100                 "       endInvocationInterlockARB();\n"
 101                 "       col_out = result;\n"
 102                 "}\n";
 103
 104         GLuint prog;
 105
 106         prog = piglit_build_simple_program(vs_text, fs_text);
 107         glUseProgram(prog);
 108
 109         glBindAttribLocation(prog, 0, "pos_in");
 110         glBindAttribLocation(prog, 1, "col_in");
 111
 112         glLinkProgram(prog);
 113
 114         if (!piglit_check_gl_error(GL_NO_ERROR)) {
 115                 piglit_report_result(PIGLIT_FAIL);
 116         }
 117
 118         return prog;
 119 }
 120
 121 static GLuint
 122 make_texture_buffer(void)
 123 {
 124         GLuint tex;
 125
 126         glGenTextures(1, &tex);
 127         glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, tex);
 128         glTexImage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE, 2,
 129                 GL_RGBA32F, piglit_width, piglit_height, false);
 130         glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, tex);
 131
 132         return tex;
 133 }
 134
 135 static GLuint
 136 make_texture_blend(void)
 137 {
 138         GLuint tex;
 139
 140         glGenTextures(1, &tex);
 141         glActiveTexture(GL_TEXTURE0);
 142         glBindTexture(GL_TEXTURE_3D, tex);
 143         glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 144         glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 145         glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 146         glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 147         glBindImageTexture(0, tex, 0, GL_TRUE, 0, GL_READ_WRITE, GL_RGBA32F);
 148
 149         return tex;
 150 }
 151
 152 static GLuint
 153 make_vao(void)
 154 {
 155         static const float pos_col[18][6] = {
 156                 { -1.0, -1.0, 0.0, 1.0, 0.0, 0.25 },
 157                 {  0.0, -1.0, 0.0, 1.0, 0.0, 0.25 },
 158                 {  0.0,  1.0, 0.0, 1.0, 0.0, 0.25 },
 159                 {  0.0,  1.0, 0.0, 1.0, 0.0, 0.25 },
 160                 { -1.0,  1.0, 0.0, 1.0, 0.0, 0.25 },
 161                 { -1.0, -1.0, 0.0, 1.0, 0.0, 0.25 },
 162                 { -1.0, -1.0, 1.0, 0.0, 0.0, 0.25 },
 163                 {  1.0, -1.0, 1.0, 0.0, 0.0, 0.25 },
 164                 {  1.0,  1.0, 1.0, 0.0, 0.0, 0.25 },
 165                 {  1.0,  1.0, 1.0, 0.0, 0.0, 0.25 },
 166                 { -1.0,  1.0, 1.0, 0.0, 0.0, 0.25 },
 167                 { -1.0, -1.0, 1.0, 0.0, 0.0, 0.25 },
 168                 { -1.0, -1.0, 0.0, 0.0, 1.0, 0.25 },
 169                 {  1.0, -1.0, 0.0, 0.0, 1.0, 0.25 },
 170                 {  1.0,  1.0, 0.0, 0.0, 1.0, 0.25 },
 171                 {  1.0,  1.0, 0.0, 0.0, 1.0, 0.25 },
 172                 { -1.0,  1.0, 0.0, 0.0, 1.0, 0.25 },
 173                 { -1.0, -1.0, 0.0, 0.0, 1.0, 0.25 }
 174         };
 175
 176         const int stride = sizeof(pos_col[0]);
 177         GLuint vbo, vao;
 178
 179         glGenVertexArrays(1, &vao);
 180         glBindVertexArray(vao);
 181
 182         glGenBuffers(1, &vbo);
 183         glBindBuffer(GL_ARRAY_BUFFER, vbo);
 184         glBufferData(GL_ARRAY_BUFFER, sizeof(pos_col), pos_col, GL_STATIC_DRAW);
 185
 186         glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, stride, (void *) 0);
 187         glVertexAttribPointer(1, 4, GL_FLOAT, GL_FALSE, stride,
 188                 (void *)(sizeof(float) * 2));
 189
 190         glEnableVertexAttribArray(0);
 191         glEnableVertexAttribArray(1);
 192
 193         if (!piglit_check_gl_error(GL_NO_ERROR)) {
 194                 piglit_report_result(PIGLIT_FAIL);
 195         }
 196
 197         return vao;
 198 }
 199
 200 void
 201 piglit_init(int argc, char **argv)
 202 {
 203         piglit_require_extension("GL_ARB_fragment_shader_interlock");
 204
 205         glEnable(GL_MULTISAMPLE);
 206         glDisable(GL_CULL_FACE);
 207         glClearColor(0.0, 0.0, 0.0, 1.0);
 208
 209         prog = make_shader_program();
 210         vao = make_vao();
 211         tex_frame = make_texture_buffer();
 212         fbo = make_fbo();
 213         tex_blend = make_texture_blend();
 214 }
 215
 216 enum piglit_result
 217 piglit_display(void)
 218 {
 219         int samples[4] = { 2, 4, 8, 16 };
 220         bool pass = true;
 221         unsigned i, j, k;
 222         const unsigned result1[4] = { 47, 35, 63, 255 };
 223         const unsigned result2[4] = { 47, 0, 63, 255 };
 224         int max_samples;
 225
 226         glViewport(0, 0, piglit_width, piglit_height);
 227         glGetIntegerv(GL_MAX_SAMPLES, &max_samples);
 228
 229         for (i = 0; i < 4 && samples[i] <= max_samples; i++) {
 230                 GLfloat *tex_data = calloc(piglit_width * piglit_height *
 231                         (samples[i] + 1) * 4, sizeof(GLfloat));
 232
 233                 glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA32F, piglit_width, piglit_height,
 234                         samples[i] + 1, 0, GL_RGBA, GL_FLOAT, tex_data);
 235
 236                 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
 237                 glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, tex_frame);
 238                 glTexImage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE, samples[i],
 239                         GL_RGBA8, piglit_width, piglit_height, false);
 240                 glUniform1i(1, samples[i]);
 241
 242                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT |
 243                         GL_STENCIL_BUFFER_BIT);
 244
 245                 glUseProgram(prog);
 246                 glDrawArrays(GL_TRIANGLES, 0, 18);
 247
 248                 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
 249                 glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo);
 250                 glDrawBuffer(GL_BACK);
 251                 glBlitFramebuffer(0, 0, piglit_width, piglit_height, 0, 0, piglit_width,
 252                         piglit_height, GL_COLOR_BUFFER_BIT, GL_NEAREST);
 253                 pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
 254                 piglit_present_results();
 255
 256                 glGetTexImage(GL_TEXTURE_3D, 0, GL_RGBA, GL_FLOAT, tex_data);
 257                 for (j = 0; j < piglit_height; j++) {
 258                         for (k = 0; k < piglit_width; k++) {
 259                                 unsigned l = ((piglit_width * piglit_height * samples[i]) +
 260                                         (j * piglit_width) + k) * 4;
 261                                 unsigned r = fabs(tex_data[l]) * 255;
 262                                 unsigned g = fabs(tex_data[l + 1]) * 255;
 263                                 unsigned b = fabs(tex_data[l + 2]) * 255;
 264                                 unsigned a = fabs(tex_data[l + 3]) * 255;
 265
 266                                 if ((k < piglit_width / 2) && (r != result1[0] ||
 267                                           g != result1[1] || b != result1[2] || a != result1[3])) {
 268                                         printf("observed %u %u     %u %u %u %u\n", j, k, r,
 269                                                 g, b, a);
 270                                         printf("expected %u %u     %u %u %u %u\n", j, k,
 271                                                 result1[0], result1[1], result1[2], result1[3]);
 272                                         pass = false;
 273                                         break;
 274                                 }
 275
 276                                 if ((k > piglit_width / 2) && (r != result2[0] ||
 277                                           g != result2[1] || b != result2[2] || a != result2[3])) {
 278                                         printf("observed %u %u     %u %u %u %u\n", j, k, r,
 279                                                 g, b, a);
 280                                         printf("expected %u %u     %u %u %u %u\n", j, k,
 281                                                 result1[0], result1[1], result1[2], result1[3]);
 282                                         pass = false;
 283                                         break;
 284                                 }
 285                         }
 286                         if (!pass)
 287                                 break;
 288                 }
 289
 290                 free(tex_data);
 291                 pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
 292                 if (!pass)
 293                         break;
 294         }
 295
 296         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 297 }