Brecht Van Lommel
9cfc7967dd
* Replace license text in headers with SPDX identifiers. * Remove specific license info from outdated readme.txt, instead leave details to the source files. * Add list of SPDX license identifiers used, and corresponding license texts. * Update copyright dates while we're at it. Ref D14069, T95597
63 lines
1.6 KiB
C++
63 lines
1.6 KiB
C++
/* SPDX-License-Identifier: Apache-2.0
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* Copyright 2017-2022 Blender Foundation */
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#ifndef __UTIL_RECT_H__
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#define __UTIL_RECT_H__
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#include "util/types.h"
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CCL_NAMESPACE_BEGIN
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/* Rectangles are represented as a int4 containing the coordinates of the lower-left and
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* upper-right corners in the order (x0, y0, x1, y1). */
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ccl_device_inline int4 rect_from_shape(int x0, int y0, int w, int h)
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{
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return make_int4(x0, y0, x0 + w, y0 + h);
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}
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ccl_device_inline int4 rect_expand(int4 rect, int d)
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{
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return make_int4(rect.x - d, rect.y - d, rect.z + d, rect.w + d);
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}
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/* Returns the intersection of two rects. */
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ccl_device_inline int4 rect_clip(int4 a, int4 b)
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{
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return make_int4(max(a.x, b.x), max(a.y, b.y), min(a.z, b.z), min(a.w, b.w));
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}
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ccl_device_inline bool rect_is_valid(int4 rect)
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{
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return (rect.z > rect.x) && (rect.w > rect.y);
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}
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/* Returns the local row-major index of the pixel inside the rect. */
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ccl_device_inline int coord_to_local_index(int4 rect, int x, int y)
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{
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int w = rect.z - rect.x;
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return (y - rect.y) * w + (x - rect.x);
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}
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/* Finds the coordinates of a pixel given by its row-major index in the rect,
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* and returns whether the pixel is inside it. */
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ccl_device_inline bool local_index_to_coord(int4 rect,
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int idx,
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ccl_private int *x,
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ccl_private int *y)
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{
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int w = rect.z - rect.x;
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*x = (idx % w) + rect.x;
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*y = (idx / w) + rect.y;
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return (*y < rect.w);
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}
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ccl_device_inline int rect_size(int4 rect)
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{
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return (rect.z - rect.x) * (rect.w - rect.y);
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}
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CCL_NAMESPACE_END
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#endif /* __UTIL_RECT_H__ */
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