1 /*
2 * This program is free software; you can redistribute it and/or
3 * modify it under the terms of the GNU General Public License
4 * as published by the Free Software Foundation; either version 2
5 * of the License, or (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software Foundation,
14 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
15 *
16 * Copyright 2011, Blender Foundation.
17 */
18
19 #include "COM_RotateOperation.h"
20 #include "BLI_math.h"
21
RotateOperation()22 RotateOperation::RotateOperation() : NodeOperation()
23 {
24 this->addInputSocket(COM_DT_COLOR);
25 this->addInputSocket(COM_DT_VALUE);
26 this->addOutputSocket(COM_DT_COLOR);
27 this->setResolutionInputSocketIndex(0);
28 this->m_imageSocket = NULL;
29 this->m_degreeSocket = NULL;
30 this->m_doDegree2RadConversion = false;
31 this->m_isDegreeSet = false;
32 }
initExecution()33 void RotateOperation::initExecution()
34 {
35 this->m_imageSocket = this->getInputSocketReader(0);
36 this->m_degreeSocket = this->getInputSocketReader(1);
37 this->m_centerX = (getWidth() - 1) / 2.0;
38 this->m_centerY = (getHeight() - 1) / 2.0;
39 }
40
deinitExecution()41 void RotateOperation::deinitExecution()
42 {
43 this->m_imageSocket = NULL;
44 this->m_degreeSocket = NULL;
45 }
46
ensureDegree()47 inline void RotateOperation::ensureDegree()
48 {
49 if (!this->m_isDegreeSet) {
50 float degree[4];
51 this->m_degreeSocket->readSampled(degree, 0, 0, COM_PS_NEAREST);
52 double rad;
53 if (this->m_doDegree2RadConversion) {
54 rad = DEG2RAD((double)degree[0]);
55 }
56 else {
57 rad = degree[0];
58 }
59 this->m_cosine = cos(rad);
60 this->m_sine = sin(rad);
61
62 this->m_isDegreeSet = true;
63 }
64 }
65
executePixelSampled(float output[4],float x,float y,PixelSampler sampler)66 void RotateOperation::executePixelSampled(float output[4], float x, float y, PixelSampler sampler)
67 {
68 ensureDegree();
69 const float dy = y - this->m_centerY;
70 const float dx = x - this->m_centerX;
71 const float nx = this->m_centerX + (this->m_cosine * dx + this->m_sine * dy);
72 const float ny = this->m_centerY + (-this->m_sine * dx + this->m_cosine * dy);
73 this->m_imageSocket->readSampled(output, nx, ny, sampler);
74 }
75
determineDependingAreaOfInterest(rcti * input,ReadBufferOperation * readOperation,rcti * output)76 bool RotateOperation::determineDependingAreaOfInterest(rcti *input,
77 ReadBufferOperation *readOperation,
78 rcti *output)
79 {
80 ensureDegree();
81 rcti newInput;
82
83 const float dxmin = input->xmin - this->m_centerX;
84 const float dymin = input->ymin - this->m_centerY;
85 const float dxmax = input->xmax - this->m_centerX;
86 const float dymax = input->ymax - this->m_centerY;
87
88 const float x1 = this->m_centerX + (this->m_cosine * dxmin + this->m_sine * dymin);
89 const float x2 = this->m_centerX + (this->m_cosine * dxmax + this->m_sine * dymin);
90 const float x3 = this->m_centerX + (this->m_cosine * dxmin + this->m_sine * dymax);
91 const float x4 = this->m_centerX + (this->m_cosine * dxmax + this->m_sine * dymax);
92 const float y1 = this->m_centerY + (-this->m_sine * dxmin + this->m_cosine * dymin);
93 const float y2 = this->m_centerY + (-this->m_sine * dxmax + this->m_cosine * dymin);
94 const float y3 = this->m_centerY + (-this->m_sine * dxmin + this->m_cosine * dymax);
95 const float y4 = this->m_centerY + (-this->m_sine * dxmax + this->m_cosine * dymax);
96 const float minx = min(x1, min(x2, min(x3, x4)));
97 const float maxx = max(x1, max(x2, max(x3, x4)));
98 const float miny = min(y1, min(y2, min(y3, y4)));
99 const float maxy = max(y1, max(y2, max(y3, y4)));
100
101 newInput.xmax = ceil(maxx) + 1;
102 newInput.xmin = floor(minx) - 1;
103 newInput.ymax = ceil(maxy) + 1;
104 newInput.ymin = floor(miny) - 1;
105
106 return NodeOperation::determineDependingAreaOfInterest(&newInput, readOperation, output);
107 }
108