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/*
* Copyright (C) 2014 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 level.c
*
* Test the binding of individual mipmap levels to an image unit by
* dumping the whole accessible contents of an image to the
* framebuffer and then checking that the observed values match the
* bound mipmap level. The same mipmap level is then overwritten by
* the shader program after its contents have been read.
*/
#include "common.h"
/** Window width. */
#define W 16
/** Window height. */
#define H 96
/** Total number of pixels in the window and image. */
#define N (W * H)
/** Maximum number of mipmap levels. */
#define M 11
PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_core_version = 32;
config.window_width = W;
config.window_height = H;
config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
PIGLIT_GL_TEST_CONFIG_END
static bool
init_image(const struct image_info img, unsigned l)
{
const unsigned num_levels = image_num_levels(img);
uint32_t pixels[4 * N * M];
unsigned i;
for (i = 0; i < 4 * N * num_levels; ++i)
pixels[i] = encode(img.format, i);
return upload_image_levels(img, num_levels, l, 0, pixels);
}
static bool
check_fb(const struct grid_info grid, const struct image_info img, unsigned l)
{
const unsigned offset = 4 * image_level_offset(img, l);
const unsigned n = 4 * product(grid.size);
uint32_t pixels_fb[4 * N], expect_fb[4 * N];
unsigned i;
if (!download_result(grid, pixels_fb))
return false;
for (i = 0; i < n; ++i) {
/*
* The framebuffer contents should reflect level l of
* the image which is read by the shader program.
*/
expect_fb[i] = encode(grid.format, offset + i);
}
if (!check_pixels_v(image_info_for_grid(grid), pixels_fb, expect_fb)) {
printf(" Source: framebuffer\n");
return false;
}
return true;
}
static bool
check_img(const struct image_info img, unsigned l)
{
const unsigned num_levels = image_num_levels(img);
uint32_t pixels_img[4 * N * M], expect_img[4 * N];
unsigned i, j;
if (!download_image_levels(img, num_levels, 0, pixels_img))
return false;
for (j = 0; j < num_levels; ++j) {
const struct image_info level_img = image_info_for_level(img, j);
const unsigned offset = 4 * image_level_offset(img, j);
const unsigned n = 4 * product(level_img.size);
for (i = 0; i < n; ++i) {
if (j == l) {
/*
* Level l should have been modified
* by the shader.
*/
expect_img[i] = encode(img.format, 33);
} else {
/*
* Other levels should have remained
* unchanged.
*/
expect_img[i] = encode(img.format, offset + i);
}
}
if (!check_pixels_v(level_img, &pixels_img[offset],
expect_img)) {
printf(" Source: image level %d\n", j);
return false;
}
}
return true;
}
/**
* Bind an individual level of a texture mipmap to an image unit, read
* its contents and write back a different value to the same location.
*/
static bool
run_test(const struct image_target_info *target)
{
const unsigned level = 3;
const struct image_info img = image_info(
target->target, GL_RGBA32F, W, H);
const struct image_info level_img = image_info_for_level(img, level);
const struct grid_info grid = {
GL_FRAGMENT_SHADER_BIT, img.format,
image_optimal_extent(level_img.size)
};
GLuint prog = generate_program(
grid, GL_FRAGMENT_SHADER,
concat(image_hunk(level_img, ""),
hunk("uniform IMAGE_T img;\n"
"\n"
"GRID_T op(ivec2 idx, GRID_T x) {\n"
" GRID_T v = imageLoad(img, IMAGE_ADDR(idx));\n"
" imageStore(img, IMAGE_ADDR(idx), DATA_T(33));\n"
" return v;\n"
"}\n"), NULL));
bool ret = prog && init_fb(grid) &&
init_image(img, level) &&
set_uniform_int(prog, "img", 0) &&
draw_grid(grid, prog) &&
check_fb(grid, img, level) &&
check_img(img, level);
glDeleteProgram(prog);
return ret;
}
void
piglit_init(int argc, char **argv)
{
enum piglit_result status = PIGLIT_PASS;
const struct image_target_info *target;
piglit_require_extension("GL_ARB_shader_image_load_store");
for (target = image_targets(); target->name; ++target) {
if (image_target_mipmapping_dimensions(target))
subtest(&status, true, run_test(target),
"%s level binding test", target->name);
}
piglit_report_result(status);
}
enum piglit_result
piglit_display(void)
{
return PIGLIT_FAIL;
}
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