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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_PreviewOperation.h"
#include "BKE_image.h"
#include "BLI_listbase.h"
#include "BLI_math.h"
#include "BLI_math_color.h"
#include "BLI_utildefines.h"
#include "COM_defines.h"
#include "MEM_guardedalloc.h"
#include "PIL_time.h"
#include "WM_api.h"
#include "WM_types.h"
#include "BKE_node.h"
#include "IMB_colormanagement.h"
#include "IMB_imbuf.h"
#include "IMB_imbuf_types.h"
PreviewOperation::PreviewOperation(const ColorManagedViewSettings *viewSettings,
const ColorManagedDisplaySettings *displaySettings)
: NodeOperation()
{
this->addInputSocket(COM_DT_COLOR, COM_SC_NO_RESIZE);
this->m_preview = NULL;
this->m_outputBuffer = NULL;
this->m_input = NULL;
this->m_divider = 1.0f;
this->m_viewSettings = viewSettings;
this->m_displaySettings = displaySettings;
}
void PreviewOperation::verifyPreview(bNodeInstanceHash *previews, bNodeInstanceKey key)
{
/* Size (0, 0) ensures the preview rect is not allocated in advance,
* this is set later in initExecution once the resolution is determined.
*/
this->m_preview = BKE_node_preview_verify(previews, key, 0, 0, true);
}
void PreviewOperation::initExecution()
{
this->m_input = getInputSocketReader(0);
if (this->getWidth() == (unsigned int)this->m_preview->xsize &&
this->getHeight() == (unsigned int)this->m_preview->ysize) {
this->m_outputBuffer = this->m_preview->rect;
}
if (this->m_outputBuffer == NULL) {
this->m_outputBuffer = (unsigned char *)MEM_callocN(
sizeof(unsigned char) * 4 * getWidth() * getHeight(), "PreviewOperation");
if (this->m_preview->rect) {
MEM_freeN(this->m_preview->rect);
}
this->m_preview->xsize = getWidth();
this->m_preview->ysize = getHeight();
this->m_preview->rect = this->m_outputBuffer;
}
}
void PreviewOperation::deinitExecution()
{
this->m_outputBuffer = NULL;
this->m_input = NULL;
}
void PreviewOperation::executeRegion(rcti *rect, unsigned int /*tileNumber*/)
{
int offset;
float color[4];
struct ColormanageProcessor *cm_processor;
cm_processor = IMB_colormanagement_display_processor_new(this->m_viewSettings,
this->m_displaySettings);
for (int y = rect->ymin; y < rect->ymax; y++) {
offset = (y * getWidth() + rect->xmin) * 4;
for (int x = rect->xmin; x < rect->xmax; x++) {
float rx = floor(x / this->m_divider);
float ry = floor(y / this->m_divider);
color[0] = 0.0f;
color[1] = 0.0f;
color[2] = 0.0f;
color[3] = 1.0f;
this->m_input->readSampled(color, rx, ry, COM_PS_NEAREST);
IMB_colormanagement_processor_apply_v4(cm_processor, color);
rgba_float_to_uchar(this->m_outputBuffer + offset, color);
offset += 4;
}
}
IMB_colormanagement_processor_free(cm_processor);
}
bool PreviewOperation::determineDependingAreaOfInterest(rcti *input,
ReadBufferOperation *readOperation,
rcti *output)
{
rcti newInput;
newInput.xmin = input->xmin / this->m_divider;
newInput.xmax = input->xmax / this->m_divider;
newInput.ymin = input->ymin / this->m_divider;
newInput.ymax = input->ymax / this->m_divider;
return NodeOperation::determineDependingAreaOfInterest(&newInput, readOperation, output);
}
void PreviewOperation::determineResolution(unsigned int resolution[2],
unsigned int preferredResolution[2])
{
NodeOperation::determineResolution(resolution, preferredResolution);
int width = resolution[0];
int height = resolution[1];
this->m_divider = 0.0f;
if (width > height) {
this->m_divider = COM_PREVIEW_SIZE / (width - 1);
}
else {
this->m_divider = COM_PREVIEW_SIZE / (height - 1);
}
width = width * this->m_divider;
height = height * this->m_divider;
resolution[0] = width;
resolution[1] = height;
}
CompositorPriority PreviewOperation::getRenderPriority() const
{
return COM_PRIORITY_LOW;
}
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