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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 2011, Blender Foundation.
*/
#include "COM_MemoryBuffer.h"
#include "MEM_guardedalloc.h"
namespace blender::compositor {
MemoryBuffer::MemoryBuffer(MemoryProxy *memoryProxy, const rcti &rect, MemoryBufferState state)
{
m_rect = rect;
this->m_memoryProxy = memoryProxy;
this->m_num_channels = COM_data_type_num_channels(memoryProxy->getDataType());
this->m_buffer = (float *)MEM_mallocN_aligned(
sizeof(float) * buffer_len() * this->m_num_channels, 16, "COM_MemoryBuffer");
this->m_state = state;
this->m_datatype = memoryProxy->getDataType();
}
MemoryBuffer::MemoryBuffer(DataType dataType, const rcti &rect)
{
m_rect = rect;
this->m_memoryProxy = nullptr;
this->m_num_channels = COM_data_type_num_channels(dataType);
this->m_buffer = (float *)MEM_mallocN_aligned(
sizeof(float) * buffer_len() * this->m_num_channels, 16, "COM_MemoryBuffer");
this->m_state = MemoryBufferState::Temporary;
this->m_datatype = dataType;
}
MemoryBuffer::MemoryBuffer(const MemoryBuffer &src)
: MemoryBuffer(src.m_memoryProxy, src.m_rect, MemoryBufferState::Temporary)
{
memcpy(m_buffer, src.m_buffer, buffer_len() * m_num_channels * sizeof(float));
}
void MemoryBuffer::clear()
{
memset(m_buffer, 0, buffer_len() * m_num_channels * sizeof(float));
}
float MemoryBuffer::get_max_value() const
{
float result = this->m_buffer[0];
const unsigned int size = this->buffer_len();
unsigned int i;
const float *fp_src = this->m_buffer;
for (i = 0; i < size; i++, fp_src += this->m_num_channels) {
float value = *fp_src;
if (value > result) {
result = value;
}
}
return result;
}
float MemoryBuffer::get_max_value(const rcti &rect) const
{
rcti rect_clamp;
/* first clamp the rect by the bounds or we get un-initialized values */
BLI_rcti_isect(&rect, &this->m_rect, &rect_clamp);
if (!BLI_rcti_is_empty(&rect_clamp)) {
MemoryBuffer temp_buffer(this->m_datatype, rect_clamp);
temp_buffer.fill_from(*this);
return temp_buffer.get_max_value();
}
BLI_assert(0);
return 0.0f;
}
MemoryBuffer::~MemoryBuffer()
{
if (this->m_buffer) {
MEM_freeN(this->m_buffer);
this->m_buffer = nullptr;
}
}
void MemoryBuffer::fill_from(const MemoryBuffer &src)
{
unsigned int otherY;
unsigned int minX = MAX2(this->m_rect.xmin, src.m_rect.xmin);
unsigned int maxX = MIN2(this->m_rect.xmax, src.m_rect.xmax);
unsigned int minY = MAX2(this->m_rect.ymin, src.m_rect.ymin);
unsigned int maxY = MIN2(this->m_rect.ymax, src.m_rect.ymax);
int offset;
int otherOffset;
for (otherY = minY; otherY < maxY; otherY++) {
otherOffset = ((otherY - src.m_rect.ymin) * src.getWidth() + minX - src.m_rect.xmin) *
this->m_num_channels;
offset = ((otherY - this->m_rect.ymin) * getWidth() + minX - this->m_rect.xmin) *
this->m_num_channels;
memcpy(&this->m_buffer[offset],
&src.m_buffer[otherOffset],
(maxX - minX) * this->m_num_channels * sizeof(float));
}
}
void MemoryBuffer::writePixel(int x, int y, const float color[4])
{
if (x >= this->m_rect.xmin && x < this->m_rect.xmax && y >= this->m_rect.ymin &&
y < this->m_rect.ymax) {
const int offset = (getWidth() * (y - this->m_rect.ymin) + x - this->m_rect.xmin) *
this->m_num_channels;
memcpy(&this->m_buffer[offset], color, sizeof(float) * this->m_num_channels);
}
}
void MemoryBuffer::addPixel(int x, int y, const float color[4])
{
if (x >= this->m_rect.xmin && x < this->m_rect.xmax && y >= this->m_rect.ymin &&
y < this->m_rect.ymax) {
const int offset = (getWidth() * (y - this->m_rect.ymin) + x - this->m_rect.xmin) *
this->m_num_channels;
float *dst = &this->m_buffer[offset];
const float *src = color;
for (int i = 0; i < this->m_num_channels; i++, dst++, src++) {
*dst += *src;
}
}
}
static void read_ewa_pixel_sampled(void *userdata, int x, int y, float result[4])
{
MemoryBuffer *buffer = (MemoryBuffer *)userdata;
buffer->read(result, x, y);
}
void MemoryBuffer::readEWA(float *result, const float uv[2], const float derivatives[2][2])
{
BLI_assert(this->m_datatype == DataType::Color);
float inv_width = 1.0f / (float)this->getWidth(), inv_height = 1.0f / (float)this->getHeight();
/* TODO(sergey): Render pipeline uses normalized coordinates and derivatives,
* but compositor uses pixel space. For now let's just divide the values and
* switch compositor to normalized space for EWA later.
*/
float uv_normal[2] = {uv[0] * inv_width, uv[1] * inv_height};
float du_normal[2] = {derivatives[0][0] * inv_width, derivatives[0][1] * inv_height};
float dv_normal[2] = {derivatives[1][0] * inv_width, derivatives[1][1] * inv_height};
BLI_ewa_filter(this->getWidth(),
this->getHeight(),
false,
true,
uv_normal,
du_normal,
dv_normal,
read_ewa_pixel_sampled,
this,
result);
}
} // namespace blender::compositor
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