2  * Copyright (C) 2011-2013 Intel Corporation
33  * drm_rect_intersect - intersect two rectangles
46 	r1->x1 = max(r1->x1, r2->x1);  in drm_rect_intersect()
47 	r1->y1 = max(r1->y1, r2->y1);  in drm_rect_intersect()
48 	r1->x2 = min(r1->x2, r2->x2);  in drm_rect_intersect()
49 	r1->y2 = min(r1->y2, r2->y2);  in drm_rect_intersect()
65 	tmp = mul_u32_u32(src, dst - *clip);  in clip_scaled()
78  * drm_rect_clip_scaled - perform a scaled clip operation
84  * the corresponding amounts, retaining the vertical and horizontal scaling
96 	diff = clip->x1 - dst->x1;  in drm_rect_clip_scaled()
101 		src->x1 = src->x2 - new_src_w;  in drm_rect_clip_scaled()
102 		dst->x1 += diff;  in drm_rect_clip_scaled()
104 	diff = clip->y1 - dst->y1;  in drm_rect_clip_scaled()
109 		src->y1 = src->y2 - new_src_h;  in drm_rect_clip_scaled()
110 		dst->y1 += diff;  in drm_rect_clip_scaled()
112 	diff = dst->x2 - clip->x2;  in drm_rect_clip_scaled()
117 		src->x2 = src->x1 + new_src_w;  in drm_rect_clip_scaled()
118 		dst->x2 -= diff;  in drm_rect_clip_scaled()
120 	diff = dst->y2 - clip->y2;  in drm_rect_clip_scaled()
125 		src->y2 = src->y1 + new_src_h;  in drm_rect_clip_scaled()
126 		dst->y2 -= diff;  in drm_rect_clip_scaled()
138 		return -EINVAL;  in drm_calc_scale()
152  * drm_rect_calc_hscale - calculate the horizontal scaling factor
180 		return -ERANGE;  in drm_rect_calc_hscale()
187  * drm_rect_calc_vscale - calculate the vertical scaling factor
190  * @min_vscale: minimum allowed vertical scaling factor
191  * @max_vscale: maximum allowed vertical scaling factor
193  * Calculate the vertical scaling factor as
201  * The vertical scaling factor, or errno of out of limits.
215 		return -ERANGE;  in drm_rect_calc_vscale()
222  * drm_rect_debug_print - print the rectangle information
237  * drm_rect_rotate - Rotate the rectangle
249  * to the vertical axis of the untransformed coordinate
262 			r->x1 = width - tmp.x2;  in drm_rect_rotate()
263 			r->x2 = width - tmp.x1;  in drm_rect_rotate()
267 			r->y1 = height - tmp.y2;  in drm_rect_rotate()
268 			r->y2 = height - tmp.y1;  in drm_rect_rotate()
277 		r->x1 = tmp.y1;  in drm_rect_rotate()
278 		r->x2 = tmp.y2;  in drm_rect_rotate()
279 		r->y1 = width - tmp.x2;  in drm_rect_rotate()
280 		r->y2 = width - tmp.x1;  in drm_rect_rotate()
284 		r->x1 = width - tmp.x2;  in drm_rect_rotate()
285 		r->x2 = width - tmp.x1;  in drm_rect_rotate()
286 		r->y1 = height - tmp.y2;  in drm_rect_rotate()
287 		r->y2 = height - tmp.y1;  in drm_rect_rotate()
291 		r->x1 = height - tmp.y2;  in drm_rect_rotate()
292 		r->x2 = height - tmp.y1;  in drm_rect_rotate()
293 		r->y1 = tmp.x1;  in drm_rect_rotate()
294 		r->y2 = tmp.x2;  in drm_rect_rotate()
303  * drm_rect_rotate_inv - Inverse rotate the rectangle
316  * to the vertical axis of the original untransformed
317  * coordinate space, so that you never have to flip
337 		r->x1 = width - tmp.y2;  in drm_rect_rotate_inv()
338 		r->x2 = width - tmp.y1;  in drm_rect_rotate_inv()
339 		r->y1 = tmp.x1;  in drm_rect_rotate_inv()
340 		r->y2 = tmp.x2;  in drm_rect_rotate_inv()
344 		r->x1 = width - tmp.x2;  in drm_rect_rotate_inv()
345 		r->x2 = width - tmp.x1;  in drm_rect_rotate_inv()
346 		r->y1 = height - tmp.y2;  in drm_rect_rotate_inv()
347 		r->y2 = height - tmp.y1;  in drm_rect_rotate_inv()
351 		r->x1 = tmp.y1;  in drm_rect_rotate_inv()
352 		r->x2 = tmp.y2;  in drm_rect_rotate_inv()
353 		r->y1 = height - tmp.x2;  in drm_rect_rotate_inv()
354 		r->y2 = height - tmp.x1;  in drm_rect_rotate_inv()
364 			r->x1 = width - tmp.x2;  in drm_rect_rotate_inv()
365 			r->x2 = width - tmp.x1;  in drm_rect_rotate_inv()
369 			r->y1 = height - tmp.y2;  in drm_rect_rotate_inv()
370 			r->y2 = height - tmp.y1;  in drm_rect_rotate_inv()