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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.
*/
#pragma once
#include "COM_MultiThreadedOperation.h"
namespace blender::compositor {
class BaseScaleOperation : public MultiThreadedOperation {
public:
void setSampler(PixelSampler sampler)
{
this->m_sampler = (int)sampler;
}
void setVariableSize(bool variable_size)
{
m_variable_size = variable_size;
};
protected:
BaseScaleOperation();
PixelSampler getEffectiveSampler(PixelSampler sampler)
{
return (m_sampler == -1) ? sampler : (PixelSampler)m_sampler;
}
int m_sampler;
bool m_variable_size;
};
class ScaleOperation : public BaseScaleOperation {
public:
static constexpr float MIN_SCALE_FACTOR = 0.0001f;
static constexpr float MAX_CANVAS_SCALE_FACTOR = 2.0f;
protected:
static constexpr int IMAGE_INPUT_INDEX = 0;
static constexpr int X_INPUT_INDEX = 1;
static constexpr int Y_INPUT_INDEX = 2;
SocketReader *m_inputOperation;
SocketReader *m_inputXOperation;
SocketReader *m_inputYOperation;
float canvas_center_x_;
float canvas_center_y_;
float input_width_scaled_;
float input_height_scaled_;
float scale_offset_x_;
float scale_offset_y_;
public:
ScaleOperation();
ScaleOperation(DataType data_type);
/** Scale a coordinate from a center inverting given relative scale . */
static float scale_coord_inverted(const float coord,
const float center,
const float relative_scale)
{
return center + (coord - center) / MAX2(relative_scale, MIN_SCALE_FACTOR);
}
static float scale_coord(float coord, float scale_offset, float relative_scale)
{
return (scale_offset + coord) /
(relative_scale < MIN_SCALE_FACTOR ? MIN_SCALE_FACTOR : relative_scale);
}
static void scale_area(rcti &rect,
float scale_offset_x,
float scale_offset_y,
float relative_scale_x,
float relative_scale_y);
static void scale_area_inverted(
rcti &rect, float center_x, float center_y, float scale_x, float scale_y);
void init_data() override;
void initExecution() override;
void deinitExecution() override;
void get_area_of_interest(int input_idx, const rcti &output_area, rcti &r_input_area) override;
void update_memory_buffer_partial(MemoryBuffer *output,
const rcti &area,
Span<MemoryBuffer *> inputs) override;
void determine_canvas(const rcti &preferred_area, rcti &r_area) override;
protected:
virtual float get_relative_scale_x_factor(float width) = 0;
virtual float get_relative_scale_y_factor(float height) = 0;
private:
float get_constant_scale(int input_op_idx, float factor);
float get_constant_scale_x(float width);
float get_constant_scale_y(float height);
};
class ScaleRelativeOperation : public ScaleOperation {
public:
ScaleRelativeOperation();
ScaleRelativeOperation(DataType data_type);
bool determineDependingAreaOfInterest(rcti *input,
ReadBufferOperation *readOperation,
rcti *output) override;
void executePixelSampled(float output[4], float x, float y, PixelSampler sampler) override;
float get_relative_scale_x_factor(float width) override
{
return 1.0f;
}
float get_relative_scale_y_factor(float height) override
{
return 1.0f;
}
};
class ScaleAbsoluteOperation : public ScaleOperation {
public:
bool determineDependingAreaOfInterest(rcti *input,
ReadBufferOperation *readOperation,
rcti *output) override;
void executePixelSampled(float output[4], float x, float y, PixelSampler sampler) override;
float get_relative_scale_x_factor(float width) override
{
return 1.0f / width;
}
float get_relative_scale_y_factor(float height) override
{
return 1.0f / height;
}
};
class ScaleFixedSizeOperation : public BaseScaleOperation {
SocketReader *m_inputOperation;
int m_newWidth;
int m_newHeight;
float m_relX;
float m_relY;
/* center is only used for aspect correction */
float m_offsetX;
float m_offsetY;
bool m_is_aspect;
bool m_is_crop;
/* set from other properties on initialization,
* check if we need to apply offset */
bool m_is_offset;
public:
ScaleFixedSizeOperation();
bool determineDependingAreaOfInterest(rcti *input,
ReadBufferOperation *readOperation,
rcti *output) override;
void determine_canvas(const rcti &preferred_area, rcti &r_area) override;
void executePixelSampled(float output[4], float x, float y, PixelSampler sampler) override;
void init_data() override;
void initExecution() override;
void deinitExecution() override;
void setNewWidth(int width)
{
this->m_newWidth = width;
}
void setNewHeight(int height)
{
this->m_newHeight = height;
}
void setIsAspect(bool is_aspect)
{
this->m_is_aspect = is_aspect;
}
void setIsCrop(bool is_crop)
{
this->m_is_crop = is_crop;
}
void setOffset(float x, float y)
{
this->m_offsetX = x;
this->m_offsetY = y;
}
void get_area_of_interest(int input_idx, const rcti &output_area, rcti &r_input_area) override;
void update_memory_buffer_partial(MemoryBuffer *output,
const rcti &area,
Span<MemoryBuffer *> inputs) override;
};
} // namespace blender::compositor
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