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/*
* Copyright 2011, Blender Foundation.
*
* 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.
*
* Contributor:
* Jeroen Bakker
* Monique Dewanchand
*/
#include "COM_MemoryBuffer.h"
#include "MEM_guardedalloc.h"
using std::min;
using std::max;
static unsigned int determine_num_channels(DataType datatype)
{
switch (datatype) {
case COM_DT_VALUE:
return COM_NUM_CHANNELS_VALUE;
case COM_DT_VECTOR:
return COM_NUM_CHANNELS_VECTOR;
case COM_DT_COLOR:
default:
return COM_NUM_CHANNELS_COLOR;
}
}
unsigned int MemoryBuffer::determineBufferSize()
{
return getWidth() * getHeight();
}
int MemoryBuffer::getWidth() const
{
return this->m_width;
}
int MemoryBuffer::getHeight() const
{
return this->m_height;
}
MemoryBuffer::MemoryBuffer(MemoryProxy *memoryProxy, unsigned int chunkNumber, rcti *rect)
{
BLI_rcti_init(&this->m_rect, rect->xmin, rect->xmax, rect->ymin, rect->ymax);
this->m_width = BLI_rcti_size_x(&this->m_rect);
this->m_height = BLI_rcti_size_y(&this->m_rect);
this->m_memoryProxy = memoryProxy;
this->m_chunkNumber = chunkNumber;
this->m_num_channels = determine_num_channels(memoryProxy->getDataType());
this->m_buffer = (float *)MEM_mallocN_aligned(sizeof(float) * determineBufferSize() * this->m_num_channels, 16, "COM_MemoryBuffer");
this->m_state = COM_MB_ALLOCATED;
this->m_datatype = memoryProxy->getDataType();
}
MemoryBuffer::MemoryBuffer(MemoryProxy *memoryProxy, rcti *rect)
{
BLI_rcti_init(&this->m_rect, rect->xmin, rect->xmax, rect->ymin, rect->ymax);
this->m_width = BLI_rcti_size_x(&this->m_rect);
this->m_height = BLI_rcti_size_y(&this->m_rect);
this->m_memoryProxy = memoryProxy;
this->m_chunkNumber = -1;
this->m_num_channels = determine_num_channels(memoryProxy->getDataType());
this->m_buffer = (float *)MEM_mallocN_aligned(sizeof(float) * determineBufferSize() * this->m_num_channels, 16, "COM_MemoryBuffer");
this->m_state = COM_MB_TEMPORARILY;
this->m_datatype = memoryProxy->getDataType();
}
MemoryBuffer::MemoryBuffer(DataType dataType, rcti *rect)
{
BLI_rcti_init(&this->m_rect, rect->xmin, rect->xmax, rect->ymin, rect->ymax);
this->m_width = BLI_rcti_size_x(&this->m_rect);
this->m_height = BLI_rcti_size_y(&this->m_rect);
this->m_height = this->m_rect.ymax - this->m_rect.ymin;
this->m_memoryProxy = NULL;
this->m_chunkNumber = -1;
this->m_num_channels = determine_num_channels(dataType);
this->m_buffer = (float *)MEM_mallocN_aligned(sizeof(float) * determineBufferSize() * this->m_num_channels, 16, "COM_MemoryBuffer");
this->m_state = COM_MB_TEMPORARILY;
this->m_datatype = dataType;
}
MemoryBuffer *MemoryBuffer::duplicate()
{
MemoryBuffer *result = new MemoryBuffer(this->m_memoryProxy, &this->m_rect);
memcpy(result->m_buffer, this->m_buffer, this->determineBufferSize() * this->m_num_channels * sizeof(float));
return result;
}
void MemoryBuffer::clear()
{
memset(this->m_buffer, 0, this->determineBufferSize() * this->m_num_channels * sizeof(float));
}
float MemoryBuffer::getMaximumValue()
{
float result = this->m_buffer[0];
const unsigned int size = this->determineBufferSize();
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::getMaximumValue(rcti *rect)
{
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 = new MemoryBuffer(this->m_datatype, &rect_clamp);
temp->copyContentFrom(this);
float result = temp->getMaximumValue();
delete temp;
return result;
}
else {
BLI_assert(0);
return 0.0f;
}
}
MemoryBuffer::~MemoryBuffer()
{
if (this->m_buffer) {
MEM_freeN(this->m_buffer);
this->m_buffer = NULL;
}
}
void MemoryBuffer::copyContentFrom(MemoryBuffer *otherBuffer)
{
if (!otherBuffer) {
BLI_assert(0);
return;
}
unsigned int otherY;
unsigned int minX = max(this->m_rect.xmin, otherBuffer->m_rect.xmin);
unsigned int maxX = min(this->m_rect.xmax, otherBuffer->m_rect.xmax);
unsigned int minY = max(this->m_rect.ymin, otherBuffer->m_rect.ymin);
unsigned int maxY = min(this->m_rect.ymax, otherBuffer->m_rect.ymax);
int offset;
int otherOffset;
for (otherY = minY; otherY < maxY; otherY++) {
otherOffset = ((otherY - otherBuffer->m_rect.ymin) * otherBuffer->m_width + minX - otherBuffer->m_rect.xmin) * this->m_num_channels;
offset = ((otherY - this->m_rect.ymin) * this->m_width + minX - this->m_rect.xmin) * this->m_num_channels;
memcpy(&this->m_buffer[offset], &otherBuffer->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 = (this->m_width * (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 = (this->m_width * (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 == COM_DT_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);
}
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