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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2011 Blender Foundation. */
#include "COM_DirectionalBlurOperation.h"
#include "COM_OpenCLDevice.h"
namespace blender::compositor {
DirectionalBlurOperation::DirectionalBlurOperation()
{
this->add_input_socket(DataType::Color);
this->add_output_socket(DataType::Color);
flags_.complex = true;
flags_.open_cl = true;
input_program_ = nullptr;
}
void DirectionalBlurOperation::init_execution()
{
input_program_ = get_input_socket_reader(0);
QualityStepHelper::init_execution(COM_QH_INCREASE);
const float angle = data_->angle;
const float zoom = data_->zoom;
const float spin = data_->spin;
const float iterations = data_->iter;
const float distance = data_->distance;
const float center_x = data_->center_x;
const float center_y = data_->center_y;
const float width = get_width();
const float height = get_height();
const float a = angle;
const float itsc = 1.0f / powf(2.0f, (float)iterations);
float D;
D = distance * sqrtf(width * width + height * height);
center_x_pix_ = center_x * width;
center_y_pix_ = center_y * height;
tx_ = itsc * D * cosf(a);
ty_ = -itsc * D * sinf(a);
sc_ = itsc * zoom;
rot_ = itsc * spin;
}
void DirectionalBlurOperation::execute_pixel(float output[4], int x, int y, void * /*data*/)
{
const int iterations = pow(2.0f, data_->iter);
float col[4] = {0.0f, 0.0f, 0.0f, 0.0f};
float col2[4] = {0.0f, 0.0f, 0.0f, 0.0f};
input_program_->read_sampled(col2, x, y, PixelSampler::Bilinear);
float ltx = tx_;
float lty = ty_;
float lsc = sc_;
float lrot = 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 - center_y_pix_) + lty;
const float u = isc * (x - center_x_pix_) + ltx;
input_program_->read_sampled(col,
cs * u + ss * v + center_x_pix_,
cs * v - ss * u + center_y_pix_,
PixelSampler::Bilinear);
add_v4_v4(col2, col);
/* double transformations */
ltx += tx_;
lty += ty_;
lrot += rot_;
lsc += sc_;
}
mul_v4_v4fl(output, col2, 1.0f / (iterations + 1));
}
void DirectionalBlurOperation::execute_opencl(OpenCLDevice *device,
MemoryBuffer *output_memory_buffer,
cl_mem cl_output_buffer,
MemoryBuffer **input_memory_buffers,
std::list<cl_mem> *cl_mem_to_clean_up,
std::list<cl_kernel> * /*cl_kernels_to_clean_up*/)
{
cl_kernel directional_blur_kernel = device->COM_cl_create_kernel("directional_blur_kernel",
nullptr);
cl_int iterations = pow(2.0f, data_->iter);
cl_float2 ltxy = {{tx_, ty_}};
cl_float2 centerpix = {{center_x_pix_, center_y_pix_}};
cl_float lsc = sc_;
cl_float lrot = rot_;
device->COM_cl_attach_memory_buffer_to_kernel_parameter(
directional_blur_kernel, 0, -1, cl_mem_to_clean_up, input_memory_buffers, input_program_);
device->COM_cl_attach_output_memory_buffer_to_kernel_parameter(
directional_blur_kernel, 1, cl_output_buffer);
device->COM_cl_attach_memory_buffer_offset_to_kernel_parameter(
directional_blur_kernel, 2, output_memory_buffer);
clSetKernelArg(directional_blur_kernel, 3, sizeof(cl_int), &iterations);
clSetKernelArg(directional_blur_kernel, 4, sizeof(cl_float), &lsc);
clSetKernelArg(directional_blur_kernel, 5, sizeof(cl_float), &lrot);
clSetKernelArg(directional_blur_kernel, 6, sizeof(cl_float2), <xy);
clSetKernelArg(directional_blur_kernel, 7, sizeof(cl_float2), ¢erpix);
device->COM_cl_enqueue_range(directional_blur_kernel, output_memory_buffer, 8, this);
}
void DirectionalBlurOperation::deinit_execution()
{
input_program_ = nullptr;
}
bool DirectionalBlurOperation::determine_depending_area_of_interest(
rcti * /*input*/, ReadBufferOperation *read_operation, rcti *output)
{
rcti new_input;
new_input.xmax = this->get_width();
new_input.xmin = 0;
new_input.ymax = this->get_height();
new_input.ymin = 0;
return NodeOperation::determine_depending_area_of_interest(&new_input, read_operation, 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, 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 = tx_;
float lty = ty_;
float lsc = sc_;
float lrot = 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 - center_y_pix_) + lty;
const float u = isc * (x - center_x_pix_) + ltx;
float color[4];
input->read_elem_bilinear(
cs * u + ss * v + center_x_pix_, cs * v - ss * u + center_y_pix_, color);
add_v4_v4(color_accum, color);
/* Double transformations. */
ltx += tx_;
lty += ty_;
lrot += rot_;
lsc += sc_;
}
mul_v4_v4fl(it.out, color_accum, 1.0f / (iterations + 1));
}
}
} // namespace blender::compositor
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