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96 lines
2.3 KiB
96 lines
2.3 KiB
/* |
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* linux/drivers/video/console/fbcon_rotate.h -- Software Display Rotation |
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* |
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* Copyright (C) 2005 Antonino Daplas <[email protected]> |
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* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file COPYING in the main directory of this archive |
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* for more details. |
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*/ |
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#ifndef _FBCON_ROTATE_H |
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#define _FBCON_ROTATE_H |
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#define GETVYRES(s,i) ({ \ |
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(s == SCROLL_REDRAW || s == SCROLL_MOVE) ? \ |
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(i)->var.yres : (i)->var.yres_virtual; }) |
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#define GETVXRES(s,i) ({ \ |
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(s == SCROLL_REDRAW || s == SCROLL_MOVE || !(i)->fix.xpanstep) ? \ |
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(i)->var.xres : (i)->var.xres_virtual; }) |
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static inline int pattern_test_bit(u32 x, u32 y, u32 pitch, const char *pat) |
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{ |
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u32 tmp = (y * pitch) + x, index = tmp / 8, bit = tmp % 8; |
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pat +=index; |
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return (*pat) & (0x80 >> bit); |
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} |
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static inline void pattern_set_bit(u32 x, u32 y, u32 pitch, char *pat) |
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{ |
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u32 tmp = (y * pitch) + x, index = tmp / 8, bit = tmp % 8; |
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pat += index; |
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(*pat) |= 0x80 >> bit; |
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} |
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static inline void rotate_ud(const char *in, char *out, u32 width, u32 height) |
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{ |
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int i, j; |
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int shift = (8 - (width % 8)) & 7; |
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width = (width + 7) & ~7; |
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for (i = 0; i < height; i++) { |
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for (j = 0; j < width - shift; j++) { |
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if (pattern_test_bit(j, i, width, in)) |
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pattern_set_bit(width - (1 + j + shift), |
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height - (1 + i), |
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width, out); |
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} |
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} |
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} |
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static inline void rotate_cw(const char *in, char *out, u32 width, u32 height) |
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{ |
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int i, j, h = height, w = width; |
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int shift = (8 - (height % 8)) & 7; |
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width = (width + 7) & ~7; |
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height = (height + 7) & ~7; |
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for (i = 0; i < h; i++) { |
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for (j = 0; j < w; j++) { |
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if (pattern_test_bit(j, i, width, in)) |
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pattern_set_bit(height - 1 - i - shift, j, |
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height, out); |
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} |
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} |
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} |
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static inline void rotate_ccw(const char *in, char *out, u32 width, u32 height) |
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{ |
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int i, j, h = height, w = width; |
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int shift = (8 - (width % 8)) & 7; |
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width = (width + 7) & ~7; |
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height = (height + 7) & ~7; |
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for (i = 0; i < h; i++) { |
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for (j = 0; j < w; j++) { |
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if (pattern_test_bit(j, i, width, in)) |
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pattern_set_bit(i, width - 1 - j - shift, |
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height, out); |
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} |
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} |
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} |
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extern void fbcon_rotate_cw(struct fbcon_ops *ops); |
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extern void fbcon_rotate_ud(struct fbcon_ops *ops); |
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extern void fbcon_rotate_ccw(struct fbcon_ops *ops); |
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#endif
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