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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Copyright 2021, Blender Foundation.
*/
#include "testing/testing.h"
#include "COM_BufferArea.h"
namespace blender::compositor::tests {
static rcti create_rect(int width, int height)
{
rcti rect;
BLI_rcti_init(&rect, 0, width, 0, height);
return rect;
}
static rcti create_rect(int width, int height, int offset)
{
rcti rect;
BLI_rcti_init(&rect, offset, offset + width, offset, offset + height);
return rect;
}
TEST(BufferArea, BufferConstructor)
{
const int width = 2;
const int height = 3;
BufferArea<float> area(nullptr, width, height, 4);
EXPECT_EQ(area.width(), width);
EXPECT_EQ(area.height(), height);
rcti rect = create_rect(width, height);
EXPECT_TRUE(BLI_rcti_compare(&area.get_rect(), &rect));
}
TEST(BufferArea, AreaConstructor)
{
const int buf_width = 5;
const int area_width = 1;
const int area_height = 3;
rcti area_rect = create_rect(area_width, area_height, 1);
BufferArea<float> area(nullptr, buf_width, area_rect, 4);
EXPECT_EQ(area.width(), area_width);
EXPECT_EQ(area.height(), area_height);
EXPECT_TRUE(BLI_rcti_compare(&area.get_rect(), &area_rect));
}
static void fill_buffer_with_indexes(float *buf, int buf_len)
{
for (int i = 0; i < buf_len; i++) {
buf[i] = i;
}
}
static void test_single_elem_iteration(float *buffer, BufferArea<float> area)
{
int elems_count = 0;
for (float *elem : area) {
EXPECT_EQ(elem, buffer);
elems_count++;
}
EXPECT_EQ(elems_count, 1);
}
static void test_full_buffer_iteration(
float *buf, int buf_width, int buf_len, int num_channels, BufferArea<float> area)
{
fill_buffer_with_indexes(buf, buf_len);
rcti rect = area.get_rect();
int x = rect.xmin;
int y = rect.ymin;
for (float *elem : area) {
for (int ch = 0; ch < num_channels; ch++) {
const int buf_index = y * buf_width * num_channels + x * num_channels + ch;
EXPECT_NEAR(elem[ch], buf_index, FLT_EPSILON);
}
x++;
if (x == rect.xmax) {
y++;
x = rect.xmin;
}
}
EXPECT_EQ(x, rect.xmin);
EXPECT_EQ(y, rect.ymax);
}
TEST(BufferArea, SingleElemBufferIteration)
{
const int buf_width = 4;
const int buf_height = 5;
const int area_width = 2;
const int area_height = 3;
const int num_channels = 4;
const int stride = 0;
float buf[num_channels];
{
BufferArea area(buf, buf_width, buf_height, stride);
test_single_elem_iteration(buf, area);
}
{
rcti area_rect = create_rect(area_width, area_height, 1);
BufferArea area(buf, buf_width, area_rect, stride);
test_single_elem_iteration(buf, area);
}
}
TEST(BufferArea, FullBufferIteration)
{
const int buf_width = 4;
const int area_width = 2;
const int area_height = 3;
const int buf_height = (area_height + 1);
const int num_channels = 4;
const int buf_len = buf_height * buf_width * num_channels;
float buf[buf_len];
{
BufferArea area(buf, buf_width, buf_height, num_channels);
test_full_buffer_iteration(buf, buf_width, buf_len, num_channels, area);
}
{
rcti area_rect = create_rect(area_width, area_height, 1);
BufferArea area(buf, buf_width, area_rect, num_channels);
test_full_buffer_iteration(buf, buf_width, buf_len, num_channels, area);
}
}
} // namespace blender::compositor::tests
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