tests/spec/arb_shader_storage_buffer_object/layout-std430-write-shader.c

   1 /*
   2  * Copyright © 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"),
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   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,
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  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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  23
  24 /** @file layout-std430-write-shader.c
  25  *
  26  * Tests that shader storage block writes in GLSL works correctly (offsets and
  27  * values) when interface packing qualifier is std430.
  28  *
  29  * From GL_ARB_shader_storage_buffer_object:
  30  *
  31  *  "When using the "std430" storage layout, shader storage
  32  *   blocks will be laid out in buffer storage identically to uniform and
  33  *   shader storage blocks using the "std140" layout, except that the base
  34  *   alignment of arrays of scalars and vectors in rule (4) and of structures
  35  *   in rule (9) are not rounded up a multiple of the base alignment of a vec4."
  36  */
  37
  38 #include "piglit-util-gl.h"
  39
  40 PIGLIT_GL_TEST_CONFIG_BEGIN
  41         config.window_width = 100;
  42         config.window_height = 100;
  43         config.supports_gl_compat_version = 32;
  44         config.supports_gl_core_version = 32;
  45         config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
  46         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  47
  48 PIGLIT_GL_TEST_CONFIG_END
  49
  50 #define SSBO_SIZE 64
  51
  52 static const char vs_pass_thru_text[] =
  53         "#version 130\n"
  54         "#extension GL_ARB_shader_storage_buffer_object : require\n"
  55         "#extension GL_ARB_uniform_buffer_object : require\n"
  56         "\n"
  57         "struct B { float b1[3]; };\n"
  58         "struct A {\n"
  59         "       float a1;\n"
  60         "       vec3 a2;\n"
  61         "       mat2 a4[2];\n"
  62         "       B sb[2];\n"
  63         "};\n"
  64         "layout(std430, binding=2) buffer ssbo {\n"
  65         "       vec4 v;\n"
  66         "       float f;\n"
  67         "       A s;\n"
  68         "       mat3x4 m;\n"
  69         "       vec2 v2a[3];\n"
  70         "       vec3 v3a[2];\n"
  71         "       float unsized_array[];\n"
  72         "};\n"
  73         "in vec4 piglit_vertex;\n"
  74         "void main() {\n"
  75         "       gl_Position = piglit_vertex;\n"
  76         "       v.yz = vec2(1.0, 2.0);\n"
  77         "       f = 4.0;\n"
  78         "       s.a2.x = 6.0; \n"
  79         "       s.a2.y = 7.0; \n"
  80         "       s.a4[0] = mat2(10.0, 11.0, 12.0, 13.0);\n"
  81         "       s.sb[0].b1[0] = 18.0;\n"
  82         "       s.sb[0].b1[1] = 19.0;\n"
  83         "       m[1] = vec4(25.0, 26.0, 27.0, 28.0);\n"
  84         "       v2a[0].yx = vec2(34.0, 33.0);\n"
  85         "       v2a[1].y = 36.0;\n"
  86         "       v3a[0].xz = vec2(39.0, 41.0);\n"
  87         "       v3a[1].y = 43.0;\n"
  88         "       int index = int(v.x); // index should be zero\n"
  89         "       if ((index + gl_VertexID) < 4)\n"
  90         "              unsized_array[index + gl_VertexID] = unsized_array.length();\n"
  91         "}\n";
  92
  93 static const char fs_source[] =
  94         "#version 130\n"
  95         "#extension GL_ARB_shader_storage_buffer_object : require\n"
  96         "#extension GL_ARB_uniform_buffer_object : require\n"
  97         "\n"
  98         "struct B { float b1[3]; };\n"
  99         "struct A {\n"
 100         "       float a1;\n"
 101         "       vec3 a2;\n"
 102         "       mat2 a4[2];\n"
 103         "       B sb[2];\n"
 104         "};\n"
 105         "layout(std430, binding=2) buffer ssbo {\n"
 106         "       vec4 v;\n"
 107         "       float f;\n"
 108         "       A s;\n"
 109         "       mat3x4 m;\n"
 110         "       vec2 v2a[3];\n"
 111         "       vec3 v3a[2];\n"
 112         "       float unsized_array[];\n"
 113         "};\n"
 114         "out vec4 color;\n"
 115         "\n"
 116         "void main() {\n"
 117         "       color = vec4(0,1,0,1);\n"
 118         "       v.xw = vec2(0.0, 3.0);\n"
 119         "       s.a1 = 5.0;\n"
 120         "       s.a2.z = 8.0;\n"
 121         "       s.a4[1] = mat2(14.0, 15.0, 16.0, 17.0);\n"
 122         "       s.sb[1].b1[2] = 20.0;\n"
 123         "       m[0] = vec4(21.0, 22.0, 23.0, 24.0);\n"
 124         "       m[2] = vec4(29.0, 30.0, 31.0, 32.0);\n"
 125         "       v2a[1].x = 35.0;\n"
 126         "       v2a[2].xy = vec2(37.0, 38.0);\n"
 127         "       v3a[0].y = 40.0;\n"
 128         "       v3a[1].xz = vec2(42.0, 44.0);\n"
 129         "       int index = int(v.z + gl_FragCoord.x);\n"
 130         "       if (index >= 0 && index < 4)\n"
 131         "              unsized_array[index] = unsized_array.length() * 2.0;\n"
 132         "}\n";
 133
 134 GLuint prog;
 135
 136 float expected[SSBO_SIZE] = { 0.0,  1.0,  2.0,  3.0, // vec4 v
 137                               4.0,  0.0,  0.0,  0.0, // float f
 138                               5.0,  0.0,  0.0,  0.0, // float s.a1
 139                               6.0,  7.0,  8.0,  0.0, // vec3 s.a2
 140                              10.0, 11.0, 12.0, 13.0, // mat2 s.a4[0]
 141                              14.0, 15.0, 16.0, 17.0, // mat2 s.a4[1]
 142                              18.0, 19.0,  0.0,  0.0, // float s.sb[0].b1
 143                               0.0, 20.0,  0.0,  0.0, // float s.sb[1].b1
 144                              21.0, 22.0, 23.0, 24.0, // mat3x4 m[0]
 145                              25.0, 26.0, 27.0, 28.0, // mat3x4 m[1]
 146                              29.0, 30.0, 31.0, 32.0, // mat3x4 m[2]
 147                              33.0, 34.0, 35.0, 36.0, // vec2 v2a[3]
 148                              37.0, 38.0,  0.0,  0.0, //
 149                              39.0, 40.0, 41.0,  0.0, // vec3 v3a[2]
 150                              42.0, 43.0, 44.0,  0.0, //
 151                               4.0,  4.0,  8.0,  8.0  // float unsized_array[0]
 152 };
 153
 154 void
 155 piglit_init(int argc, char **argv)
 156 {
 157         bool pass = true;
 158         GLuint buffer;
 159         unsigned int i;
 160         float ssbo_values[SSBO_SIZE] = {0};
 161         float *map;
 162         GLint num_vertex_ssbo;
 163
 164         piglit_require_extension("GL_ARB_shader_storage_buffer_object");
 165         piglit_require_GLSL_version(130);
 166
 167         glGetIntegerv(GL_MAX_VERTEX_SHADER_STORAGE_BLOCKS, &num_vertex_ssbo);
 168         if (num_vertex_ssbo < 1)
 169                 piglit_report_result(PIGLIT_SKIP);
 170
 171         prog = piglit_build_simple_program(vs_pass_thru_text, fs_source);
 172
 173         glUseProgram(prog);
 174
 175         glClearColor(0, 0, 0, 0);
 176
 177         glGenBuffers(1, &buffer);
 178         glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 2, buffer);
 179         glBufferData(GL_SHADER_STORAGE_BUFFER, SSBO_SIZE*sizeof(GLfloat),
 180                                 &ssbo_values[0], GL_DYNAMIC_DRAW);
 181
 182         glViewport(0, 0, piglit_width, piglit_height);
 183
 184         piglit_draw_rect(-1, -1, 2, 2);
 185
 186         glBindBuffer(GL_SHADER_STORAGE_BUFFER, buffer);
 187         map = (float *) glMapBuffer(GL_SHADER_STORAGE_BUFFER,  GL_READ_ONLY);
 188
 189         for (i = 0; i < SSBO_SIZE; i++) {
 190                 if (map[i] != expected[i]) {
 191                         printf("expected[%d] = %.2f. Read value: %.2f\n",
 192                                i, expected[i], map[i]);
 193                         pass = false;
 194                 }
 195         }
 196
 197         glUnmapBuffer(GL_SHADER_STORAGE_BUFFER);
 198
 199         if (!piglit_check_gl_error(GL_NO_ERROR))
 200            pass = false;
 201
 202         piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
 203 }
 204
 205 enum piglit_result piglit_display(void)
 206 {
 207         /* UNREACHED */
 208         return PIGLIT_FAIL;
 209 }