transform.cc File Reference

#include <type_traits>
#include "BLI_math_color_blend.h"
#include "BLI_math_interp.hh"
#include "BLI_math_matrix.hh"
#include "BLI_math_vector.h"
#include "BLI_rect.h"
#include "BLI_task.hh"
#include "IMB_imbuf.hh"
#include "IMB_interp.hh"

Go to the source code of this file.

Classes
struct	blender::imbuf::transform::TransformContext

Namespaces
namespace	blender
namespace	blender::imbuf
namespace	blender::imbuf::transform

Functions
static bool	blender::imbuf::transform::should_discard (const TransformContext &ctx, const float2 &uv)
template<typename T >
static T *	blender::imbuf::transform::init_pixel_pointer (const ImBuf *image, int x, int y)
template<>
uchar *	blender::imbuf::transform::init_pixel_pointer (const ImBuf *image, int x, int y)
template<>
float *	blender::imbuf::transform::init_pixel_pointer (const ImBuf *image, int x, int y)
static float	blender::imbuf::transform::wrap_uv (float value, int size)
template<eIMBInterpolationFilterMode Filter, typename T , int NumChannels, bool WrapUV>
static void	blender::imbuf::transform::sample_image (const ImBuf *source, float u, float v, T *r_sample)
static void	blender::imbuf::transform::add_subsample (const float src[4], float dst[4])
static void	blender::imbuf::transform::add_subsample (const uchar src[4], float dst[4])
static void	blender::imbuf::transform::store_premul_float_sample (const float sample[4], float dst[4])
static void	blender::imbuf::transform::store_premul_float_sample (const float sample[4], uchar dst[4])
template<int SrcChannels>
static void	blender::imbuf::transform::store_sample (const uchar *sample, uchar *dst)
template<int SrcChannels>
static void	blender::imbuf::transform::store_sample (const float *sample, float *dst)
template<eIMBInterpolationFilterMode Filter, typename T , int SrcChannels, bool CropSource, bool WrapUV>
static void	blender::imbuf::transform::process_scanlines (const TransformContext &ctx, IndexRange y_range)
template<eIMBInterpolationFilterMode Filter, typename T , int SrcChannels>
static void	blender::imbuf::transform::transform_scanlines (const TransformContext &ctx, IndexRange y_range)
template<eIMBInterpolationFilterMode Filter>
static void	blender::imbuf::transform::transform_scanlines_filter (const TransformContext &ctx, IndexRange y_range)
static float	blender::imbuf::transform::calc_coverage (float2 pos, int2 ipos, float2 delta, bool is_steep)
static void	blender::imbuf::transform::edge_aa (const TransformContext &ctx)
void	IMB_transform (const ImBuf *src, ImBuf *dst, const eIMBTransformMode mode, const eIMBInterpolationFilterMode filter, const float transform_matrix[4][4], const rctf *src_crop)
	Transform source image buffer onto destination image buffer using a transform matrix.

Function Documentation

IMB_transform()

void IMB_transform	(	const ImBuf *	src,
		ImBuf *	dst,
		eIMBTransformMode	mode,
		eIMBInterpolationFilterMode	filter,
		const float	transform_matrix[4][4],
		const rctf *	src_crop )

Transform source image buffer onto destination image buffer using a transform matrix.

Parameters

src	Image buffer to read from.
dst	Image buffer to write to. rect or rect_float must already be initialized. dst buffer must be a 4 channel buffers. Only one data type buffer will be used (rect_float has priority over rect)
mode	Cropping/Wrap repeat effect to apply during transformation.
filter	Interpolation to use during sampling.
transform_matrix	Transformation matrix to use. The given matrix should transform between dst pixel space to src pixel space. One unit is one pixel.
src_crop	Cropping region how to crop the source buffer. Should only be passed when mode is set to IMB_TRANSFORM_MODE_CROP_SRC. For any other mode this should be empty.

During transformation no data/color conversion will happens. When transforming between float images the number of channels of the source buffer may be between 1 and 4. When source buffer has one channel the data will be read as a gray scale value.

Definition at line 466 of file imbuf/intern/transform.cc.

References BLI_assert_msg, ImBuf::channels, blender::imbuf::transform::TransformContext::dst, blender::imbuf::transform::TransformContext::dst_region_y_range, IMB_FILTER_BILINEAR, IMB_FILTER_BOX, IMB_FILTER_CUBIC_BSPLINE, IMB_FILTER_CUBIC_MITCHELL, IMB_TRANSFORM_MODE_CROP_SRC, blender::imbuf::transform::TransformContext::init(), blender::imbuf::transform::TransformContext::mode, blender::threading::parallel_for(), blender::imbuf::transform::TransformContext::src, blender::imbuf::transform::TransformContext::src_crop, and blender::imbuf::transform::transform_scanlines_filter().

Referenced by imb_scale_via_transform(), sequencer_preprocess_transform_crop(), blender::imbuf::tests::TEST(), blender::imbuf::tests::transform_2x_smaller(), and blender::imbuf::tests::transform_fractional_larger().