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968ceb71d5
The idea is that for a rectangle intersection, each corner of the result is either entirely part of one original rectangle or it is an intersection point. By detecting those 2 cases and treating them differently, we can simplify the code to compare rounded rectangles.
72 lines
3.8 KiB
C
72 lines
3.8 KiB
C
#pragma once
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#include "gskroundedrect.h"
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#include <cairo.h>
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G_BEGIN_DECLS
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#define OPPOSITE_CORNER(corner) ((corner) ^ 2)
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G_STATIC_ASSERT (OPPOSITE_CORNER (GSK_CORNER_TOP_LEFT) == GSK_CORNER_BOTTOM_RIGHT);
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G_STATIC_ASSERT (OPPOSITE_CORNER (GSK_CORNER_TOP_RIGHT) == GSK_CORNER_BOTTOM_LEFT);
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G_STATIC_ASSERT (OPPOSITE_CORNER (GSK_CORNER_BOTTOM_LEFT) == GSK_CORNER_TOP_RIGHT);
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G_STATIC_ASSERT (OPPOSITE_CORNER (GSK_CORNER_BOTTOM_RIGHT) == GSK_CORNER_TOP_LEFT);
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#define OPPOSITE_CORNER_X(corner) ((corner) ^ 1)
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G_STATIC_ASSERT (OPPOSITE_CORNER_X (GSK_CORNER_TOP_LEFT) == GSK_CORNER_TOP_RIGHT);
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G_STATIC_ASSERT (OPPOSITE_CORNER_X (GSK_CORNER_TOP_RIGHT) == GSK_CORNER_TOP_LEFT);
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G_STATIC_ASSERT (OPPOSITE_CORNER_X (GSK_CORNER_BOTTOM_LEFT) == GSK_CORNER_BOTTOM_RIGHT);
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G_STATIC_ASSERT (OPPOSITE_CORNER_X (GSK_CORNER_BOTTOM_RIGHT) == GSK_CORNER_BOTTOM_LEFT);
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#define OPPOSITE_CORNER_Y(corner) ((corner) ^ 3)
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G_STATIC_ASSERT (OPPOSITE_CORNER_Y (GSK_CORNER_TOP_LEFT) == GSK_CORNER_BOTTOM_LEFT);
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G_STATIC_ASSERT (OPPOSITE_CORNER_Y (GSK_CORNER_TOP_RIGHT) == GSK_CORNER_BOTTOM_RIGHT);
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G_STATIC_ASSERT (OPPOSITE_CORNER_Y (GSK_CORNER_BOTTOM_LEFT) == GSK_CORNER_TOP_LEFT);
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G_STATIC_ASSERT (OPPOSITE_CORNER_Y (GSK_CORNER_BOTTOM_RIGHT) == GSK_CORNER_TOP_RIGHT);
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#define GSK_ROUNDED_RECT_INIT_FROM_RECT(_r) \
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(GskRoundedRect) { .bounds = _r, \
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.corner = { \
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GRAPHENE_SIZE_INIT(0, 0),\
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GRAPHENE_SIZE_INIT(0, 0),\
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GRAPHENE_SIZE_INIT(0, 0),\
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GRAPHENE_SIZE_INIT(0, 0),\
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}}
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void gsk_rounded_rect_scale_affine (GskRoundedRect *dest,
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const GskRoundedRect *src,
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float scale_x,
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float scale_y,
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float dx,
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float dy);
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gboolean gsk_rounded_rect_is_circular (const GskRoundedRect *self) G_GNUC_PURE;
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void gsk_rounded_rect_path (const GskRoundedRect *self,
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cairo_t *cr);
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void gsk_rounded_rect_to_float (const GskRoundedRect *self,
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const graphene_point_t *offset,
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float rect[12]);
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gboolean gsk_rounded_rect_equal (gconstpointer rect1,
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gconstpointer rect2) G_GNUC_PURE;
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char * gsk_rounded_rect_to_string (const GskRoundedRect *self) G_GNUC_MALLOC;
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typedef enum {
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GSK_INTERSECTION_EMPTY,
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GSK_INTERSECTION_NONEMPTY,
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GSK_INTERSECTION_NOT_REPRESENTABLE
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} GskRoundedRectIntersection;
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GskRoundedRectIntersection gsk_rounded_rect_intersect_with_rect (const GskRoundedRect *self,
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const graphene_rect_t *rect,
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GskRoundedRect *result) G_GNUC_PURE;
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GskRoundedRectIntersection gsk_rounded_rect_intersection (const GskRoundedRect *a,
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const GskRoundedRect *b,
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GskRoundedRect *result);
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G_END_DECLS
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