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| Rev | Author | Line No. | Line |
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| 4065 | Serge | 1 | /* |
| 2 | * Copyright (C) 2011-2013 Intel Corporation |
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| 3 | * |
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| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 5 | * copy of this software and associated documentation files (the "Software"), |
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| 6 | * to deal in the Software without restriction, including without limitation |
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| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
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| 9 | * Software is furnished to do so, subject to the following conditions: |
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| 10 | * |
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| 11 | * The above copyright notice and this permission notice (including the next |
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| 12 | * paragraph) shall be included in all copies or substantial portions of the |
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| 13 | * Software. |
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| 14 | * |
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| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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| 20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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| 21 | * SOFTWARE. |
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| 22 | */ |
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| 23 | |||
| 24 | #ifndef DRM_RECT_H |
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| 25 | #define DRM_RECT_H |
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| 26 | |||
| 27 | /** |
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| 28 | * DOC: rect utils |
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| 29 | * |
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| 30 | * Utility functions to help manage rectangular areas for |
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| 31 | * clipping, scaling, etc. calculations. |
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| 32 | */ |
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| 33 | |||
| 34 | /** |
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| 35 | * struct drm_rect - two dimensional rectangle |
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| 36 | * @x1: horizontal starting coordinate (inclusive) |
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| 37 | * @x2: horizontal ending coordinate (exclusive) |
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| 38 | * @y1: vertical starting coordinate (inclusive) |
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| 39 | * @y2: vertical ending coordinate (exclusive) |
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| 40 | */ |
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| 41 | struct drm_rect { |
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| 42 | int x1, y1, x2, y2; |
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| 43 | }; |
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| 44 | |||
| 45 | /** |
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| 46 | * drm_rect_adjust_size - adjust the size of the rectangle |
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| 47 | * @r: rectangle to be adjusted |
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| 48 | * @dw: horizontal adjustment |
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| 49 | * @dh: vertical adjustment |
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| 50 | * |
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| 51 | * Change the size of rectangle @r by @dw in the horizontal direction, |
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| 52 | * and by @dh in the vertical direction, while keeping the center |
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| 53 | * of @r stationary. |
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| 54 | * |
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| 55 | * Positive @dw and @dh increase the size, negative values decrease it. |
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| 56 | */ |
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| 57 | static inline void drm_rect_adjust_size(struct drm_rect *r, int dw, int dh) |
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| 58 | { |
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| 59 | r->x1 -= dw >> 1; |
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| 60 | r->y1 -= dh >> 1; |
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| 61 | r->x2 += (dw + 1) >> 1; |
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| 62 | r->y2 += (dh + 1) >> 1; |
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| 63 | } |
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| 64 | |||
| 65 | /** |
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| 66 | * drm_rect_translate - translate the rectangle |
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| 67 | * @r: rectangle to be tranlated |
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| 68 | * @dx: horizontal translation |
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| 69 | * @dy: vertical translation |
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| 70 | * |
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| 71 | * Move rectangle @r by @dx in the horizontal direction, |
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| 72 | * and by @dy in the vertical direction. |
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| 73 | */ |
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| 74 | static inline void drm_rect_translate(struct drm_rect *r, int dx, int dy) |
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| 75 | { |
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| 76 | r->x1 += dx; |
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| 77 | r->y1 += dy; |
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| 78 | r->x2 += dx; |
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| 79 | r->y2 += dy; |
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| 80 | } |
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| 81 | |||
| 82 | /** |
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| 83 | * drm_rect_downscale - downscale a rectangle |
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| 84 | * @r: rectangle to be downscaled |
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| 85 | * @horz: horizontal downscale factor |
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| 86 | * @vert: vertical downscale factor |
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| 87 | * |
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| 88 | * Divide the coordinates of rectangle @r by @horz and @vert. |
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| 89 | */ |
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| 90 | static inline void drm_rect_downscale(struct drm_rect *r, int horz, int vert) |
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| 91 | { |
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| 92 | r->x1 /= horz; |
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| 93 | r->y1 /= vert; |
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| 94 | r->x2 /= horz; |
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| 95 | r->y2 /= vert; |
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| 96 | } |
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| 97 | |||
| 98 | /** |
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| 99 | * drm_rect_width - determine the rectangle width |
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| 100 | * @r: rectangle whose width is returned |
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| 101 | * |
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| 102 | * RETURNS: |
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| 103 | * The width of the rectangle. |
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| 104 | */ |
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| 105 | static inline int drm_rect_width(const struct drm_rect *r) |
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| 106 | { |
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| 107 | return r->x2 - r->x1; |
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| 108 | } |
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| 109 | |||
| 110 | /** |
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| 111 | * drm_rect_height - determine the rectangle height |
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| 112 | * @r: rectangle whose height is returned |
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| 113 | * |
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| 114 | * RETURNS: |
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| 115 | * The height of the rectangle. |
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| 116 | */ |
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| 117 | static inline int drm_rect_height(const struct drm_rect *r) |
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| 118 | { |
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| 119 | return r->y2 - r->y1; |
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| 120 | } |
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| 121 | |||
| 122 | /** |
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| 123 | * drm_rect_visible - determine if the the rectangle is visible |
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| 124 | * @r: rectangle whose visibility is returned |
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| 125 | * |
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| 126 | * RETURNS: |
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| 127 | * %true if the rectangle is visible, %false otherwise. |
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| 128 | */ |
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| 129 | static inline bool drm_rect_visible(const struct drm_rect *r) |
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| 130 | { |
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| 131 | return drm_rect_width(r) > 0 && drm_rect_height(r) > 0; |
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| 132 | } |
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| 133 | |||
| 134 | /** |
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| 135 | * drm_rect_equals - determine if two rectangles are equal |
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| 136 | * @r1: first rectangle |
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| 137 | * @r2: second rectangle |
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| 138 | * |
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| 139 | * RETURNS: |
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| 140 | * %true if the rectangles are equal, %false otherwise. |
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| 141 | */ |
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| 142 | static inline bool drm_rect_equals(const struct drm_rect *r1, |
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| 143 | const struct drm_rect *r2) |
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| 144 | { |
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| 145 | return r1->x1 == r2->x1 && r1->x2 == r2->x2 && |
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| 146 | r1->y1 == r2->y1 && r1->y2 == r2->y2; |
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| 147 | } |
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| 148 | |||
| 149 | bool drm_rect_intersect(struct drm_rect *r, const struct drm_rect *clip); |
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| 150 | bool drm_rect_clip_scaled(struct drm_rect *src, struct drm_rect *dst, |
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| 151 | const struct drm_rect *clip, |
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| 152 | int hscale, int vscale); |
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| 153 | int drm_rect_calc_hscale(const struct drm_rect *src, |
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| 154 | const struct drm_rect *dst, |
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| 155 | int min_hscale, int max_hscale); |
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| 156 | int drm_rect_calc_vscale(const struct drm_rect *src, |
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| 157 | const struct drm_rect *dst, |
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| 158 | int min_vscale, int max_vscale); |
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| 159 | int drm_rect_calc_hscale_relaxed(struct drm_rect *src, |
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| 160 | struct drm_rect *dst, |
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| 161 | int min_hscale, int max_hscale); |
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| 162 | int drm_rect_calc_vscale_relaxed(struct drm_rect *src, |
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| 163 | struct drm_rect *dst, |
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| 164 | int min_vscale, int max_vscale); |
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| 6936 | serge | 165 | void drm_rect_debug_print(const char *prefix, |
| 166 | const struct drm_rect *r, bool fixed_point); |
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| 5056 | serge | 167 | void drm_rect_rotate(struct drm_rect *r, |
| 168 | int width, int height, |
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| 169 | unsigned int rotation); |
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| 170 | void drm_rect_rotate_inv(struct drm_rect *r, |
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| 171 | int width, int height, |
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| 172 | unsigned int rotation); |
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| 4065 | Serge | 173 | |
| 174 | #endif |