From 1775ea74c152ba7cf27a8bc1f071b40992c89013 Mon Sep 17 00:00:00 2001 From: Jeroen Bakker Date: Mon, 8 Mar 2021 13:41:52 +0100 Subject: Cleanup: Change extension .cpp to .cc --- .../compositor/operations/COM_DisplaceOperation.cc | 194 +++++++++++++++++++++ 1 file changed, 194 insertions(+) create mode 100644 source/blender/compositor/operations/COM_DisplaceOperation.cc (limited to 'source/blender/compositor/operations/COM_DisplaceOperation.cc') diff --git a/source/blender/compositor/operations/COM_DisplaceOperation.cc b/source/blender/compositor/operations/COM_DisplaceOperation.cc new file mode 100644 index 00000000000..fcc8bc4670e --- /dev/null +++ b/source/blender/compositor/operations/COM_DisplaceOperation.cc @@ -0,0 +1,194 @@ +/* + * 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_DisplaceOperation.h" +#include "BLI_math.h" +#include "BLI_utildefines.h" + +DisplaceOperation::DisplaceOperation() +{ + this->addInputSocket(COM_DT_COLOR); + this->addInputSocket(COM_DT_VECTOR); + this->addInputSocket(COM_DT_VALUE); + this->addInputSocket(COM_DT_VALUE); + this->addOutputSocket(COM_DT_COLOR); + this->setComplex(true); + + this->m_inputColorProgram = nullptr; + this->m_inputVectorProgram = nullptr; + this->m_inputScaleXProgram = nullptr; + this->m_inputScaleYProgram = nullptr; +} + +void DisplaceOperation::initExecution() +{ + this->m_inputColorProgram = this->getInputSocketReader(0); + this->m_inputVectorProgram = this->getInputSocketReader(1); + this->m_inputScaleXProgram = this->getInputSocketReader(2); + this->m_inputScaleYProgram = this->getInputSocketReader(3); + + this->m_width_x4 = this->getWidth() * 4; + this->m_height_x4 = this->getHeight() * 4; +} + +void DisplaceOperation::executePixelSampled(float output[4], + float x, + float y, + PixelSampler /*sampler*/) +{ + float xy[2] = {x, y}; + float uv[2], deriv[2][2]; + + pixelTransform(xy, uv, deriv); + if (is_zero_v2(deriv[0]) && is_zero_v2(deriv[1])) { + this->m_inputColorProgram->readSampled(output, uv[0], uv[1], COM_PS_BILINEAR); + } + else { + /* EWA filtering (without nearest it gets blurry with NO distortion) */ + this->m_inputColorProgram->readFiltered(output, uv[0], uv[1], deriv[0], deriv[1]); + } +} + +bool DisplaceOperation::read_displacement( + float x, float y, float xscale, float yscale, const float origin[2], float &r_u, float &r_v) +{ + float width = m_inputVectorProgram->getWidth(); + float height = m_inputVectorProgram->getHeight(); + if (x < 0.0f || x >= width || y < 0.0f || y >= height) { + r_u = 0.0f; + r_v = 0.0f; + return false; + } + + float col[4]; + m_inputVectorProgram->readSampled(col, x, y, COM_PS_BILINEAR); + r_u = origin[0] - col[0] * xscale; + r_v = origin[1] - col[1] * yscale; + return true; +} + +void DisplaceOperation::pixelTransform(const float xy[2], float r_uv[2], float r_deriv[2][2]) +{ + float col[4]; + float uv[2]; /* temporary variables for derivative estimation */ + int num; + + m_inputScaleXProgram->readSampled(col, xy[0], xy[1], COM_PS_NEAREST); + float xs = col[0]; + m_inputScaleYProgram->readSampled(col, xy[0], xy[1], COM_PS_NEAREST); + float ys = col[0]; + /* clamp x and y displacement to triple image resolution - + * to prevent hangs from huge values mistakenly plugged in eg. z buffers */ + CLAMP(xs, -m_width_x4, m_width_x4); + CLAMP(ys, -m_height_x4, m_height_x4); + + /* displaced pixel in uv coords, for image sampling */ + read_displacement(xy[0], xy[1], xs, ys, xy, r_uv[0], r_uv[1]); + + /* Estimate partial derivatives using 1-pixel offsets */ + const float epsilon[2] = {1.0f, 1.0f}; + + zero_v2(r_deriv[0]); + zero_v2(r_deriv[1]); + + num = 0; + if (read_displacement(xy[0] + epsilon[0], xy[1], xs, ys, xy, uv[0], uv[1])) { + r_deriv[0][0] += uv[0] - r_uv[0]; + r_deriv[1][0] += uv[1] - r_uv[1]; + num++; + } + if (read_displacement(xy[0] - epsilon[0], xy[1], xs, ys, xy, uv[0], uv[1])) { + r_deriv[0][0] += r_uv[0] - uv[0]; + r_deriv[1][0] += r_uv[1] - uv[1]; + num++; + } + if (num > 0) { + float numinv = 1.0f / (float)num; + r_deriv[0][0] *= numinv; + r_deriv[1][0] *= numinv; + } + + num = 0; + if (read_displacement(xy[0], xy[1] + epsilon[1], xs, ys, xy, uv[0], uv[1])) { + r_deriv[0][1] += uv[0] - r_uv[0]; + r_deriv[1][1] += uv[1] - r_uv[1]; + num++; + } + if (read_displacement(xy[0], xy[1] - epsilon[1], xs, ys, xy, uv[0], uv[1])) { + r_deriv[0][1] += r_uv[0] - uv[0]; + r_deriv[1][1] += r_uv[1] - uv[1]; + num++; + } + if (num > 0) { + float numinv = 1.0f / (float)num; + r_deriv[0][1] *= numinv; + r_deriv[1][1] *= numinv; + } +} + +void DisplaceOperation::deinitExecution() +{ + this->m_inputColorProgram = nullptr; + this->m_inputVectorProgram = nullptr; + this->m_inputScaleXProgram = nullptr; + this->m_inputScaleYProgram = nullptr; +} + +bool DisplaceOperation::determineDependingAreaOfInterest(rcti *input, + ReadBufferOperation *readOperation, + rcti *output) +{ + rcti colorInput; + rcti vectorInput; + NodeOperation *operation = nullptr; + + /* the vector buffer only needs a 2x2 buffer. The image needs whole buffer */ + /* image */ + operation = getInputOperation(0); + colorInput.xmax = operation->getWidth(); + colorInput.xmin = 0; + colorInput.ymax = operation->getHeight(); + colorInput.ymin = 0; + if (operation->determineDependingAreaOfInterest(&colorInput, readOperation, output)) { + return true; + } + + /* vector */ + operation = getInputOperation(1); + vectorInput.xmax = input->xmax + 1; + vectorInput.xmin = input->xmin - 1; + vectorInput.ymax = input->ymax + 1; + vectorInput.ymin = input->ymin - 1; + if (operation->determineDependingAreaOfInterest(&vectorInput, readOperation, output)) { + return true; + } + + /* scale x */ + operation = getInputOperation(2); + if (operation->determineDependingAreaOfInterest(input, readOperation, output)) { + return true; + } + + /* scale y */ + operation = getInputOperation(3); + if (operation->determineDependingAreaOfInterest(input, readOperation, output)) { + return true; + } + + return false; +} -- cgit v1.2.3