1 files changed, 107 insertions, 0 deletions
diff --git a/source/blender/compositor/operations/COM_RotateOperation.cc b/source/blender/compositor/operations/COM_RotateOperation.cc
new file mode 100644
index 00000000000..9a1f54a6e10
--- /dev/null
+++ b/source/blender/compositor/operations/COM_RotateOperation.cc
@@ -0,0 +1,107 @@
+/*
+ * 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_RotateOperation.h"
+#include "BLI_math.h"
+
+RotateOperation::RotateOperation()
+{
+  this->addInputSocket(COM_DT_COLOR);
+  this->addInputSocket(COM_DT_VALUE);
+  this->addOutputSocket(COM_DT_COLOR);
+  this->setResolutionInputSocketIndex(0);
+  this->m_imageSocket = nullptr;
+  this->m_degreeSocket = nullptr;
+  this->m_doDegree2RadConversion = false;
+  this->m_isDegreeSet = false;
+}
+void RotateOperation::initExecution()
+{
+  this->m_imageSocket = this->getInputSocketReader(0);
+  this->m_degreeSocket = this->getInputSocketReader(1);
+  this->m_centerX = (getWidth() - 1) / 2.0;
+  this->m_centerY = (getHeight() - 1) / 2.0;
+}
+
+void RotateOperation::deinitExecution()
+{
+  this->m_imageSocket = nullptr;
+  this->m_degreeSocket = nullptr;
+}
+
+inline void RotateOperation::ensureDegree()
+{
+  if (!this->m_isDegreeSet) {
+    float degree[4];
+    this->m_degreeSocket->readSampled(degree, 0, 0, COM_PS_NEAREST);
+    double rad;
+    if (this->m_doDegree2RadConversion) {
+      rad = DEG2RAD((double)degree[0]);
+    }
+    else {
+      rad = degree[0];
+    }
+    this->m_cosine = cos(rad);
+    this->m_sine = sin(rad);
+
+    this->m_isDegreeSet = true;
+  }
+}
+
+void RotateOperation::executePixelSampled(float output[4], float x, float y, PixelSampler sampler)
+{
+  ensureDegree();
+  const float dy = y - this->m_centerY;
+  const float dx = x - this->m_centerX;
+  const float nx = this->m_centerX + (this->m_cosine * dx + this->m_sine * dy);
+  const float ny = this->m_centerY + (-this->m_sine * dx + this->m_cosine * dy);
+  this->m_imageSocket->readSampled(output, nx, ny, sampler);
+}
+
+bool RotateOperation::determineDependingAreaOfInterest(rcti *input,
+                                                       ReadBufferOperation *readOperation,
+                                                       rcti *output)
+{
+  ensureDegree();
+  rcti newInput;
+
+  const float dxmin = input->xmin - this->m_centerX;
+  const float dymin = input->ymin - this->m_centerY;
+  const float dxmax = input->xmax - this->m_centerX;
+  const float dymax = input->ymax - this->m_centerY;
+
+  const float x1 = this->m_centerX + (this->m_cosine * dxmin + this->m_sine * dymin);
+  const float x2 = this->m_centerX + (this->m_cosine * dxmax + this->m_sine * dymin);
+  const float x3 = this->m_centerX + (this->m_cosine * dxmin + this->m_sine * dymax);
+  const float x4 = this->m_centerX + (this->m_cosine * dxmax + this->m_sine * dymax);
+  const float y1 = this->m_centerY + (-this->m_sine * dxmin + this->m_cosine * dymin);
+  const float y2 = this->m_centerY + (-this->m_sine * dxmax + this->m_cosine * dymin);
+  const float y3 = this->m_centerY + (-this->m_sine * dxmin + this->m_cosine * dymax);
+  const float y4 = this->m_centerY + (-this->m_sine * dxmax + this->m_cosine * dymax);
+  const float minx = MIN2(x1, MIN2(x2, MIN2(x3, x4)));
+  const float maxx = MAX2(x1, MAX2(x2, MAX2(x3, x4)));
+  const float miny = MIN2(y1, MIN2(y2, MIN2(y3, y4)));
+  const float maxy = MAX2(y1, MAX2(y2, MAX2(y3, y4)));
+
+  newInput.xmax = ceil(maxx) + 1;
+  newInput.xmin = floor(minx) - 1;
+  newInput.ymax = ceil(maxy) + 1;
+  newInput.ymin = floor(miny) - 1;
+
+  return NodeOperation::determineDependingAreaOfInterest(&newInput, readOperation, output);
+}