tests/spec/arb_gpu_shader_fp64/vs-non-uniform-control-flow-ubo.c

   1 /*
   2  * Copyright © 2016 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 vs-non-uniform-control-flow-ubo.c
  25  *
  26  * This test checks that uniform block reads works correctly when they are
  27  * under non-uniform control flow.
  28  */
  29
  30 #include "piglit-util-gl.h"
  31
  32 PIGLIT_GL_TEST_CONFIG_BEGIN
  33         config.window_width = 62;
  34         config.window_height = 62;
  35         config.supports_gl_compat_version = 32;
  36         config.supports_gl_core_version = 32;
  37         config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
  38         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  39 PIGLIT_GL_TEST_CONFIG_END
  40
  41 #define UBO_SIZE 12
  42
  43 static const char vs_source[] =
  44         "#version 330\n"
  45         "#extension GL_ARB_gpu_shader_fp64 : require\n"
  46         "#extension GL_ARB_shading_language_420pack : require\n"
  47         "\n"
  48         "out vec4 color;\n"
  49         "\n"
  50         "layout(binding=2) uniform ubo {\n"
  51         "        dvec2 color2[];\n"
  52         "};\n"
  53         "\n"
  54         "layout(location = 0) in vec3 inVertexPosition;\n"
  55         "\n"
  56         "void main() {\n"
  57         "        gl_Position = vec4(inVertexPosition, 1);\n"
  58         "        dvec2 rg;\n"
  59         "        if (inVertexPosition.x < 0 && inVertexPosition.y < 0)\n"
  60         "                rg = color2[0];\n"
  61         "        else\n"
  62         "                rg = color2[1];\n"
  63         "        color = vec4(rg, 0, 1);\n"
  64         "}\n";
  65
  66 static const char fs_source[] =
  67         "#version 130\n"
  68         "\n"
  69         "in vec4 color;\n"
  70         "out vec4 frag_color;\n"
  71         "\n"
  72         "void main() {\n"
  73         "        frag_color = color;\n"
  74         "}\n";
  75
  76 static GLuint prog, vertexArrayID;
  77 static GLuint fb, rb;
  78
  79 void
  80 piglit_init(int argc, char **argv)
  81 {
  82         GLuint vertexBuffer, buffer;
  83         // Vertex data
  84         static const GLfloat vertexData[4 * 3] = {
  85                 -1.0f,  -1.0f,  -1.0f,
  86                  1.0f,  -1.0f,  -1.0f,
  87                 -1.0f,   1.0f,  -1.0f,
  88                  1.0f,   1.0f,  -1.0f,
  89         };
  90         static double ubo_values[UBO_SIZE] = {0, 1, 1, 0,
  91                                               0, 0, 0, 0,
  92                                               0, 0, 0, 0};
  93
  94         piglit_require_extension("GL_ARB_gpu_shader_fp64");
  95
  96         piglit_require_GLSL_version(330);
  97
  98         prog = piglit_build_simple_program(vs_source, fs_source);
  99         glUseProgram(prog);
 100
 101         glClearColor(0, 0, 0, 1);
 102         glPointSize(10.0);
 103
 104         glGenRenderbuffers(1, &rb);
 105         glBindRenderbuffer(GL_RENDERBUFFER, rb);
 106         glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA,
 107                               piglit_width, piglit_height);
 108
 109         glGenFramebuffers(1, &fb);
 110         glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fb);
 111         glFramebufferRenderbuffer(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
 112                                   GL_RENDERBUFFER, rb);
 113
 114         // Record vertex data and attributes in a VAO
 115         glGenVertexArrays(1, &vertexArrayID);
 116         glBindVertexArray(vertexArrayID);
 117         // Upload vertex position data to a VBO
 118         glGenBuffers(1, &vertexBuffer);
 119         glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
 120         glBufferData(GL_ARRAY_BUFFER, sizeof(vertexData),
 121                      vertexData, GL_STATIC_DRAW);
 122
 123         // Bind vertex position VBO to vertex shader attribute index 0
 124         glEnableVertexAttribArray(0);
 125         glVertexAttribPointer(
 126                 0,                  // attribute index
 127                 3,                  // size
 128                 GL_FLOAT,           // type
 129                 GL_FALSE,           // normalized?
 130                 0,                  // stride
 131                 (void*)0            // buffer offset
 132                 );
 133
 134         glBindBuffer(GL_ARRAY_BUFFER, 0);
 135         // Unbind VAO
 136         glBindVertexArray(0);
 137         // Disable attribute arrays
 138         glDisableVertexAttribArray(0);
 139
 140         glGenBuffers(1, &buffer);
 141         glBindBufferBase(GL_UNIFORM_BUFFER, 2, buffer);
 142         glBufferData(GL_UNIFORM_BUFFER, UBO_SIZE*sizeof(GLdouble),
 143                                 &ubo_values[0], GL_DYNAMIC_DRAW);
 144
 145         if (!piglit_check_gl_error(GL_NO_ERROR))
 146            piglit_report_result(PIGLIT_FAIL);
 147 }
 148
 149 enum piglit_result piglit_display(void)
 150 {
 151         bool pass = true;
 152         float red[4] = {1.0, 0.0, 0.0, 1.0};
 153         float green[4] = {0.0, 1.0, 0.0, 1.0};
 154
 155         glUseProgram(prog);
 156         glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fb);
 157         glViewport(0, 0, piglit_width, piglit_height);
 158
 159         glClear(GL_COLOR_BUFFER_BIT);
 160         glBindVertexArray(vertexArrayID);
 161         glDrawArrays(GL_POINTS, 0, 4);
 162         glBindVertexArray(0);
 163
 164         glBindFramebuffer(GL_READ_FRAMEBUFFER, fb);
 165
 166         /* Verify */
 167         pass = piglit_probe_pixel_rgba(0, 0, green) && pass;
 168         pass = piglit_probe_pixel_rgba(0, piglit_height - 1, red) && pass;
 169         pass = piglit_probe_pixel_rgba(piglit_width - 1,
 170                                        piglit_height - 1, red) && pass;
 171         pass = piglit_probe_pixel_rgba(piglit_width - 1, 0, red) && pass;
 172
 173         pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
 174         piglit_present_results();
 175
 176         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 177 }