tests/spec/arb_texture_buffer_object/subdata-sync.c

   1 /*
   2  * Copyright © 2013 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 DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 /** @file subdata-sync.c
  25  *
  26  * Tests that glBufferSubData() synchronizes correctly with TBO rendering.
  27  */
  28
  29 #include "piglit-util-gl.h"
  30
  31 PIGLIT_GL_TEST_CONFIG_BEGIN
  32         config.supports_gl_compat_version = 10;
  33         config.supports_gl_core_version = 31;
  34
  35         config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
  36         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  37 PIGLIT_GL_TEST_CONFIG_END
  38
  39 enum piglit_result
  40 piglit_display(void)
  41 {
  42         static const char *vs_source =
  43                 "#version 140\n"
  44                 "in vec4 piglit_vertex;\n"
  45                 "void main()\n"
  46                 "{\n"
  47                 "       gl_Position = piglit_vertex;\n"
  48                 "}\n";
  49
  50         static const char *fs_source =
  51                 "#version 140\n"
  52                 "uniform samplerBuffer s;\n"
  53                 "void main()\n"
  54                 "{\n"
  55                 "       gl_FragColor = texelFetch(s, 0);\n"
  56                 "}\n";
  57
  58         bool pass = true;
  59         GLuint tex, bo;
  60         GLuint prog;
  61         float green[] = {0, 1, 0, 0};
  62         float blue[] =  {0, 0, 1, 0};
  63         uint8_t g_rgba8[] = {0x00, 0xff, 0x00, 0x00};
  64         uint8_t b_rgba8[] = {0x00, 0x00, 0xff, 0x00};
  65
  66         prog = piglit_build_simple_program(vs_source, fs_source);
  67         glUseProgram(prog);
  68
  69         glGenBuffers(1, &bo);
  70         glBindBuffer(GL_TEXTURE_BUFFER, bo);
  71         /* Make the buffer bigger than the data to trigger the driver
  72          * code path we want.
  73          */
  74         glBufferData(GL_TEXTURE_BUFFER, 4096, NULL, GL_STREAM_DRAW);
  75         glBufferSubData(GL_TEXTURE_BUFFER, 0, sizeof(g_rgba8), g_rgba8);
  76
  77         glGenTextures(1, &tex);
  78         glBindTexture(GL_TEXTURE_BUFFER, tex);
  79         glTexBuffer(GL_TEXTURE_BUFFER, GL_RGBA8, bo);
  80
  81         piglit_draw_rect(-1, -1, 1, 2);
  82         glBufferSubData(GL_TEXTURE_BUFFER, 0, sizeof(b_rgba8), b_rgba8);
  83         piglit_draw_rect(0, -1, 1, 2);
  84
  85         pass = pass && piglit_probe_rect_rgba(0, 0,
  86                                               piglit_width / 2, piglit_height,
  87                                               green);
  88         pass = pass && piglit_probe_rect_rgba(piglit_width / 2, 0,
  89                                               piglit_width / 2, piglit_height,
  90                                               blue);
  91
  92         piglit_present_results();
  93
  94         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
  95 }
  96
  97 void
  98 piglit_init(int argc, char **argv)
  99 {
 100         piglit_require_GLSL_version(140);
 101         if (piglit_get_gl_version() < 31)
 102                 piglit_require_extension("GL_ARB_texture_buffer_object");
 103 }