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/*
* Copyright © 2011 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
/**
* \file buffer-usage.c
*
* Tests for a bug in the i965 driver where transform feedback would
* segfault on certain buffer object allocation 'usage' arguments.
*/
#include "piglit-util-gl.h"
#define NUM_POINTS 10002
#define SHIFT_COUNT 64
PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_compat_version = 10;
config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
config.khr_no_error_support = PIGLIT_NO_ERRORS;
PIGLIT_GL_TEST_CONFIG_END
static const char *vstext =
"#version 130\n"
"out float tf;\n"
"\n"
"void main()\n"
"{\n"
" gl_Position = vec4(0.0);\n"
" tf = 1.0;\n"
"}\n";
static void
initialize_shader_and_xfb()
{
GLuint prog, vs;
const char *varying = "tf";
piglit_require_gl_version(30);
piglit_require_GLSL_version(130);
piglit_require_transform_feedback();
vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vstext);
prog = glCreateProgram();
glAttachShader(prog, vs);
glTransformFeedbackVaryings(prog, 1, &varying, GL_INTERLEAVED_ATTRIBS);
glLinkProgram(prog);
if (!piglit_link_check_status(prog)) {
glDeleteProgram(prog);
piglit_report_result(PIGLIT_FAIL);
}
glUseProgram(prog);
}
static void
draw()
{
static const GLenum bo_modes[] = {
GL_STREAM_DRAW,
GL_STREAM_READ,
GL_STREAM_COPY,
GL_STATIC_DRAW,
GL_STATIC_READ,
GL_STATIC_COPY,
GL_DYNAMIC_DRAW,
GL_DYNAMIC_READ,
GL_DYNAMIC_COPY,
};
int i;
bool pass = true;
glEnable(GL_RASTERIZER_DISCARD);
for (i = 0; i < ARRAY_SIZE(bo_modes); i++) {
static GLuint xfb_buf;
float *readback;
/* Make a new TFB output buffer with the chosen usage
* mode. Note, from ARB_vertex_buffer_object:
*
* "The specified usage value does not constrain
* the actual usage pattern of the data store."
*/
glGenBuffers(1, &xfb_buf);
glBindBuffer(GL_TRANSFORM_FEEDBACK_BUFFER, xfb_buf);
glBufferData(GL_TRANSFORM_FEEDBACK_BUFFER,
sizeof(float), NULL, bo_modes[i]);
glBindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER, 0, xfb_buf);
/* Do the draw call. Here's where we segfaulted before. */
glBeginTransformFeedback(GL_POINTS);
glDrawArrays(GL_POINTS, 0, 1);
glEndTransformFeedback();
/* Test the output, just to be sure. */
readback = glMapBuffer(GL_TRANSFORM_FEEDBACK_BUFFER,
GL_READ_ONLY);
if (readback[0] != 1.0) {
fprintf(stderr, "Readback found %f, expected 1.0\n",
readback[0]);
pass = false;
}
glUnmapBuffer(GL_TRANSFORM_FEEDBACK_BUFFER);
glDeleteBuffers(1, &xfb_buf);
}
piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
}
void
piglit_init(int argc, char **argv)
{
initialize_shader_and_xfb();
draw();
}
enum piglit_result piglit_display(void)
{
/* Test should finish before we reach here. */
return PIGLIT_FAIL;
}
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