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/*
* Copyright (c) 2013 VMware, Inc.
*
* Permission is hereby, 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.
*/
/**
* Test glGenerateMipmaps with a texture array.
* In particular, test with texture compression to expose a Mesa bug.
* See https://bugs.freedesktop.org/show_bug.cgi?id=66850
*
* Brian Paul
* 24 July 2013
*/
#include "piglit-util-gl-common.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_compat_version = 10;
config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
PIGLIT_GL_TEST_CONFIG_END
/* texture size */
#define WIDTH 128
#define HEIGHT 64
#define DEPTH 3
#define BPP 4 /* GL_RGBA/ubyte */
static bool
run_test(GLenum internalFormat)
{
unsigned char *buf, *buf2;
int level;
GLuint tex;
bool pass = true;
buf = malloc(WIDTH * HEIGHT * DEPTH * BPP);
buf2 = malloc(WIDTH * HEIGHT * DEPTH * BPP);
/* Create 2D array texture */
memset(buf, 255, WIDTH * HEIGHT * DEPTH * BPP); /* white */
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D_ARRAY, tex);
glTexImage3D(GL_TEXTURE_2D_ARRAY, 0,
internalFormat,
WIDTH, HEIGHT, DEPTH, 0,
GL_RGBA, GL_UNSIGNED_BYTE,
buf);
glGenerateMipmap(GL_TEXTURE_2D_ARRAY);
/* now read back texture images and test */
for (level = 0; (WIDTH >> level) > 0; level++) {
int x, y, z, level_size, row_len;
memset(buf2, 0, WIDTH * HEIGHT * DEPTH * BPP);
glGetTexImage(GL_TEXTURE_2D_ARRAY, level,
GL_RGBA, GL_UNSIGNED_BYTE, buf2);
/* test center texel */
x = (WIDTH >> level) / 2;
y = (HEIGHT >> level) / 2;
level_size = (WIDTH >> level) * (HEIGHT >> level) * BPP;
row_len = (WIDTH >> level) * BPP;
for (z = 0; z < DEPTH; z++) {
int pos = z * level_size + y * row_len + x * BPP;
if (buf2[pos + 0] != 255 ||
buf2[pos + 1] != 255 ||
buf2[pos + 2] != 255 ||
buf2[pos + 3] != 255) {
printf("Probe at level %d, x %d, y %d, z %d = "
" (%u, %u, %u, %u),"
" expected (255,255,255,255)\n",
level, x, y, z,
buf2[pos + 0],
buf2[pos + 1],
buf2[pos + 2],
buf2[pos + 3]);
printf("Internal tex format %s\n",
piglit_get_gl_enum_name(internalFormat));
pass = false;
break;
}
}
}
free(buf);
free(buf2);
return pass;
}
enum piglit_result
piglit_display(void)
{
bool pass = true;
pass = run_test(GL_RGBA) && pass;
if (piglit_is_extension_supported("GL_ARB_texture_compression")) {
pass = run_test(GL_COMPRESSED_RGBA) && pass;
pass = run_test(GL_COMPRESSED_RGB) && pass;
}
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void
piglit_init(int argc, char **argv)
{
piglit_require_extension("GL_EXT_texture_array");
}
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