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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_DirectionalBlurOperation.h"
#include "COM_OpenCLDevice.h"
#include "BLI_math.h"
#include "RE_pipeline.h"
namespace blender::compositor {
DirectionalBlurOperation::DirectionalBlurOperation()
{
this->addInputSocket(DataType::Color);
this->addOutputSocket(DataType::Color);
flags.complex = true;
flags.open_cl = true;
this->m_inputProgram = nullptr;
}
void DirectionalBlurOperation::initExecution()
{
this->m_inputProgram = getInputSocketReader(0);
QualityStepHelper::initExecution(COM_QH_INCREASE);
const float angle = this->m_data->angle;
const float zoom = this->m_data->zoom;
const float spin = this->m_data->spin;
const float iterations = this->m_data->iter;
const float distance = this->m_data->distance;
const float center_x = this->m_data->center_x;
const float center_y = this->m_data->center_y;
const float width = getWidth();
const float height = getHeight();
const float a = angle;
const float itsc = 1.0f / powf(2.0f, (float)iterations);
float D;
D = distance * sqrtf(width * width + height * height);
this->m_center_x_pix = center_x * width;
this->m_center_y_pix = center_y * height;
this->m_tx = itsc * D * cosf(a);
this->m_ty = -itsc * D * sinf(a);
this->m_sc = itsc * zoom;
this->m_rot = itsc * spin;
}
void DirectionalBlurOperation::executePixel(float output[4], int x, int y, void * /*data*/)
{
const int iterations = pow(2.0f, this->m_data->iter);
float col[4] = {0.0f, 0.0f, 0.0f, 0.0f};
float col2[4] = {0.0f, 0.0f, 0.0f, 0.0f};
this->m_inputProgram->readSampled(col2, x, y, PixelSampler::Bilinear);
float ltx = this->m_tx;
float lty = this->m_ty;
float lsc = this->m_sc;
float lrot = this->m_rot;
/* blur the image */
for (int i = 0; i < iterations; i++) {
const float cs = cosf(lrot), ss = sinf(lrot);
const float isc = 1.0f / (1.0f + lsc);
const float v = isc * (y - this->m_center_y_pix) + lty;
const float u = isc * (x - this->m_center_x_pix) + ltx;
this->m_inputProgram->readSampled(col,
cs * u + ss * v + this->m_center_x_pix,
cs * v - ss * u + this->m_center_y_pix,
PixelSampler::Bilinear);
add_v4_v4(col2, col);
/* double transformations */
ltx += this->m_tx;
lty += this->m_ty;
lrot += this->m_rot;
lsc += this->m_sc;
}
mul_v4_v4fl(output, col2, 1.0f / (iterations + 1));
}
void DirectionalBlurOperation::executeOpenCL(OpenCLDevice *device,
MemoryBuffer *outputMemoryBuffer,
cl_mem clOutputBuffer,
MemoryBuffer **inputMemoryBuffers,
std::list<cl_mem> *clMemToCleanUp,
std::list<cl_kernel> * /*clKernelsToCleanUp*/)
{
cl_kernel directionalBlurKernel = device->COM_clCreateKernel("directionalBlurKernel", nullptr);
cl_int iterations = pow(2.0f, this->m_data->iter);
cl_float2 ltxy = {{this->m_tx, this->m_ty}};
cl_float2 centerpix = {{this->m_center_x_pix, this->m_center_y_pix}};
cl_float lsc = this->m_sc;
cl_float lrot = this->m_rot;
device->COM_clAttachMemoryBufferToKernelParameter(
directionalBlurKernel, 0, -1, clMemToCleanUp, inputMemoryBuffers, this->m_inputProgram);
device->COM_clAttachOutputMemoryBufferToKernelParameter(
directionalBlurKernel, 1, clOutputBuffer);
device->COM_clAttachMemoryBufferOffsetToKernelParameter(
directionalBlurKernel, 2, outputMemoryBuffer);
clSetKernelArg(directionalBlurKernel, 3, sizeof(cl_int), &iterations);
clSetKernelArg(directionalBlurKernel, 4, sizeof(cl_float), &lsc);
clSetKernelArg(directionalBlurKernel, 5, sizeof(cl_float), &lrot);
clSetKernelArg(directionalBlurKernel, 6, sizeof(cl_float2), <xy);
clSetKernelArg(directionalBlurKernel, 7, sizeof(cl_float2), ¢erpix);
device->COM_clEnqueueRange(directionalBlurKernel, outputMemoryBuffer, 8, this);
}
void DirectionalBlurOperation::deinitExecution()
{
this->m_inputProgram = nullptr;
}
bool DirectionalBlurOperation::determineDependingAreaOfInterest(rcti * /*input*/,
ReadBufferOperation *readOperation,
rcti *output)
{
rcti newInput;
newInput.xmax = this->getWidth();
newInput.xmin = 0;
newInput.ymax = this->getHeight();
newInput.ymin = 0;
return NodeOperation::determineDependingAreaOfInterest(&newInput, readOperation, output);
}
void DirectionalBlurOperation::get_area_of_interest(const int input_idx,
const rcti &UNUSED(output_area),
rcti &r_input_area)
{
BLI_assert(input_idx == 0);
UNUSED_VARS_NDEBUG(input_idx);
r_input_area = this->get_canvas();
}
void DirectionalBlurOperation::update_memory_buffer_partial(MemoryBuffer *output,
const rcti &area,
Span<MemoryBuffer *> inputs)
{
const MemoryBuffer *input = inputs[0];
const int iterations = pow(2.0f, this->m_data->iter);
for (BuffersIterator<float> it = output->iterate_with({}, area); !it.is_end(); ++it) {
const int x = it.x;
const int y = it.y;
float color_accum[4];
input->read_elem_bilinear(x, y, color_accum);
/* Blur pixel. */
/* TODO(manzanilla): Many values used on iterations can be calculated beforehand. Create a
* table on operation initialization. */
float ltx = this->m_tx;
float lty = this->m_ty;
float lsc = this->m_sc;
float lrot = this->m_rot;
for (int i = 0; i < iterations; i++) {
const float cs = cosf(lrot), ss = sinf(lrot);
const float isc = 1.0f / (1.0f + lsc);
const float v = isc * (y - this->m_center_y_pix) + lty;
const float u = isc * (x - this->m_center_x_pix) + ltx;
float color[4];
input->read_elem_bilinear(
cs * u + ss * v + this->m_center_x_pix, cs * v - ss * u + this->m_center_y_pix, color);
add_v4_v4(color_accum, color);
/* Double transformations. */
ltx += this->m_tx;
lty += this->m_ty;
lrot += this->m_rot;
lsc += this->m_sc;
}
mul_v4_v4fl(it.out, color_accum, 1.0f / (iterations + 1));
}
}
} // namespace blender::compositor
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