1 /* 2 * SPDX-License-Identifier: GPL-2.0-or-later 3 */ 4 #ifndef QEMU_RECT_H 5 #define QEMU_RECT_H 6 7 #include <stdint.h> 8 #include <stdbool.h> 9 10 typedef struct QemuRect { 11 int16_t x; 12 int16_t y; 13 uint16_t width; 14 uint16_t height; 15 } QemuRect; 16 17 static inline void qemu_rect_init(QemuRect *rect, 18 int16_t x, int16_t y, 19 uint16_t width, uint16_t height) 20 { 21 rect->x = x; 22 rect->y = x; 23 rect->width = width; 24 rect->height = height; 25 } 26 27 static inline void qemu_rect_translate(QemuRect *rect, 28 int16_t dx, int16_t dy) 29 { 30 rect->x += dx; 31 rect->y += dy; 32 } 33 34 static inline bool qemu_rect_intersect(const QemuRect *a, const QemuRect *b, 35 QemuRect *res) 36 { 37 int16_t x1, x2, y1, y2; 38 39 x1 = MAX(a->x, b->x); 40 y1 = MAX(a->y, b->y); 41 x2 = MIN(a->x + a->width, b->x + b->width); 42 y2 = MIN(a->y + a->height, b->y + b->height); 43 44 if (x1 >= x2 || y1 >= y2) { 45 if (res) { 46 qemu_rect_init(res, 0, 0, 0, 0); 47 } 48 49 return false; 50 } 51 52 if (res) { 53 qemu_rect_init(res, x1, y1, x2 - x1, y2 - y1); 54 } 55 56 return true; 57 } 58 59 #endif 60