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/*
* Copyright © 2012 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 overlap.c
*
* Tests the following piece of the GL_ARB_copy_buffer spec:
*
* "An INVALID_VALUE error is generated if the same buffer object
* is bound to both readtarget and writetarget, and the ranges
* [readoffset, readoffset+size) and [writeoffset,
* writeoffset+size) overlap."
*
* And it also tests that copying works correctly if there isn't
* overlap, but with one buffer being both src and dst.
*/
#include "piglit-util-gl-common.h"
PIGLIT_GL_TEST_MAIN(
100 /*window_width*/,
100 /*window_height*/,
PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE)
static void
test_copy(GLenum usage, int data_size, int src, int dst, int size)
{
uint8_t *data;
uint8_t *expected;
uint8_t *ptr;
int i;
data = (uint8_t *)malloc(data_size);
expected = (uint8_t *)malloc(data_size);
for (i = 0; i < data_size; i++) {
data[i] = i;
}
glBufferData(GL_COPY_READ_BUFFER, data_size, data, usage);
glCopyBufferSubData(GL_COPY_READ_BUFFER, GL_COPY_WRITE_BUFFER,
src, dst, size);
if (src > dst - size &&
src < dst + size) {
if (!piglit_check_gl_error(GL_INVALID_VALUE)) {
fprintf(stderr,
"No error reported for overlapping "
"glCopyBufferSubData() from %d to %d, "
"size %d\n",
src, dst, size);
piglit_report_result(PIGLIT_FAIL);
} else {
free(expected);
free(data);
return;
}
} else {
if (!piglit_check_gl_error(0)) {
fprintf(stderr,
"Error reported for non-overlapping "
"glCopyBufferSubData() from %d to %d, "
"size %d\n",
src, dst, size);
piglit_report_result(PIGLIT_FAIL);
}
}
//piglit_reset_gl_error();
/* Now compute what the result should be and check that it matches. */
memcpy(expected, data, data_size);
memcpy(expected + dst, expected + src, size);
ptr = glMapBuffer(GL_COPY_READ_BUFFER, GL_READ_ONLY);
if (memcmp(expected, ptr, data_size)) {
fprintf(stderr,
"Data not copied correctly for non-overlapping "
"glCopyBufferSubData().\n"
"from offset %d to offset %d, size %d\n",
src, dst, size);
fprintf(stderr, "original: expected: found:\n");
for (i = 0; i < data_size; i++) {
fprintf(stderr, "0x%02x 0x%02x 0x%02x\n",
i, expected[i], ptr[i]);
}
piglit_report_result(PIGLIT_FAIL);
}
glUnmapBuffer(GL_COPY_READ_BUFFER);
free(expected);
free(data);
}
enum piglit_result
piglit_display(void)
{
/* uncreached */
return PIGLIT_FAIL;
}
void
piglit_init(int argc, char **argv)
{
GLuint buf;
int src, dst, i;
int size = 6;
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,
};
piglit_require_extension("GL_ARB_copy_buffer");
glGenBuffers(1, &buf);
glBindBufferARB(GL_COPY_READ_BUFFER, buf);
glBindBufferARB(GL_COPY_WRITE_BUFFER, buf);
for (i = 0; i < ARRAY_SIZE(bo_modes); i++) {
GLenum usage = bo_modes[i];
for (src = 0; src < size; src++) {
int max_src_size = size - src;
for (dst = 0; dst < size; dst++) {
int max_dst_size = size - dst;
int max_size = ((max_src_size < max_dst_size) ?
max_src_size :
max_dst_size);
int copy_size;
for (copy_size = 1; copy_size <= max_size;
copy_size++) {
test_copy(usage, size,
src, dst, copy_size);
}
}
}
}
glDeleteBuffers(1, &buf);
piglit_report_result(PIGLIT_PASS);
}
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