2 * Generic fillrect for frame buffers in system RAM with packed pixels of
5 * Based almost entirely from cfbfillrect.c (which is based almost entirely
6 * on Geert Uytterhoeven's fillrect routine)
8 * Copyright (C) 2007 Antonino Daplas <adaplas@pol.net>
10 * This file is subject to the terms and conditions of the GNU General Public
11 * License. See the file COPYING in the main directory of this archive for
14 #include <linux/module.h>
15 #include <linux/string.h>
17 #include <asm/types.h>
21 * Aligned pattern fill using 32/64-bit memory accesses
25 bitfill_aligned(unsigned long *dst, int dst_idx, unsigned long pat,
28 unsigned long first, last;
33 first = FB_SHIFT_HIGH(~0UL, dst_idx);
34 last = ~(FB_SHIFT_HIGH(~0UL, (dst_idx+n) % bits));
36 if (dst_idx+n <= bits) {
40 *dst = comp(pat, *dst, first);
42 /* Multiple destination words */
46 *dst = comp(pat, *dst, first);
68 *dst = comp(pat, *dst, last);
74 * Unaligned generic pattern fill using 32/64-bit memory accesses
75 * The pattern must have been expanded to a full 32/64-bit value
76 * Left/right are the appropriate shifts to convert to the pattern to be
77 * used for the next 32/64-bit word
81 bitfill_unaligned(unsigned long *dst, int dst_idx, unsigned long pat,
82 int left, int right, unsigned n, int bits)
84 unsigned long first, last;
89 first = FB_SHIFT_HIGH(~0UL, dst_idx);
90 last = ~(FB_SHIFT_HIGH(~0UL, (dst_idx+n) % bits));
92 if (dst_idx+n <= bits) {
96 *dst = comp(pat, *dst, first);
98 /* Multiple destination words */
101 *dst = comp(pat, *dst, first);
103 pat = pat << left | pat >> right;
111 pat = pat << left | pat >> right;
113 pat = pat << left | pat >> right;
115 pat = pat << left | pat >> right;
117 pat = pat << left | pat >> right;
122 pat = pat << left | pat >> right;
127 *dst = comp(pat, *dst, first);
132 * Aligned pattern invert using 32/64-bit memory accesses
135 bitfill_aligned_rev(unsigned long *dst, int dst_idx, unsigned long pat,
136 unsigned n, int bits)
138 unsigned long val = pat;
139 unsigned long first, last;
144 first = FB_SHIFT_HIGH(~0UL, dst_idx);
145 last = ~(FB_SHIFT_HIGH(~0UL, (dst_idx+n) % bits));
147 if (dst_idx+n <= bits) {
151 *dst = comp(*dst ^ val, *dst, first);
153 /* Multiple destination words */
156 *dst = comp(*dst ^ val, *dst, first);
178 *dst = comp(*dst ^ val, *dst, last);
184 * Unaligned generic pattern invert using 32/64-bit memory accesses
185 * The pattern must have been expanded to a full 32/64-bit value
186 * Left/right are the appropriate shifts to convert to the pattern to be
187 * used for the next 32/64-bit word
191 bitfill_unaligned_rev(unsigned long *dst, int dst_idx, unsigned long pat,
192 int left, int right, unsigned n, int bits)
194 unsigned long first, last;
199 first = FB_SHIFT_HIGH(~0UL, dst_idx);
200 last = ~(FB_SHIFT_HIGH(~0UL, (dst_idx+n) % bits));
202 if (dst_idx+n <= bits) {
206 *dst = comp(*dst ^ pat, *dst, first);
208 /* Multiple destination words */
212 *dst = comp(*dst ^ pat, *dst, first);
214 pat = pat << left | pat >> right;
222 pat = pat << left | pat >> right;
224 pat = pat << left | pat >> right;
226 pat = pat << left | pat >> right;
228 pat = pat << left | pat >> right;
233 pat = pat << left | pat >> right;
238 *dst = comp(*dst ^ pat, *dst, last);
242 void sys_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
244 unsigned long pat, fg;
245 unsigned long width = rect->width, height = rect->height;
246 int bits = BITS_PER_LONG, bytes = bits >> 3;
247 u32 bpp = p->var.bits_per_pixel;
251 if (p->state != FBINFO_STATE_RUNNING)
254 if (p->fix.visual == FB_VISUAL_TRUECOLOR ||
255 p->fix.visual == FB_VISUAL_DIRECTCOLOR )
256 fg = ((u32 *) (p->pseudo_palette))[rect->color];
260 pat = pixel_to_pat( bpp, fg);
262 dst = (unsigned long *)((unsigned long)p->screen_base & ~(bytes-1));
263 dst_idx = ((unsigned long)p->screen_base & (bytes - 1))*8;
264 dst_idx += rect->dy*p->fix.line_length*8+rect->dx*bpp;
265 /* FIXME For now we support 1-32 bpp only */
267 if (p->fbops->fb_sync)
268 p->fbops->fb_sync(p);
270 void (*fill_op32)(unsigned long *dst, int dst_idx,
271 unsigned long pat, unsigned n, int bits) =
276 fill_op32 = bitfill_aligned_rev;
279 fill_op32 = bitfill_aligned;
282 printk( KERN_ERR "cfb_fillrect(): unknown rop, "
283 "defaulting to ROP_COPY\n");
284 fill_op32 = bitfill_aligned;
288 dst += dst_idx >> (ffs(bits) - 1);
289 dst_idx &= (bits - 1);
290 fill_op32(dst, dst_idx, pat, width*bpp, bits);
291 dst_idx += p->fix.line_length*8;
296 int rot = (left-dst_idx) % bpp;
297 void (*fill_op)(unsigned long *dst, int dst_idx,
298 unsigned long pat, int left, int right,
299 unsigned n, int bits) = NULL;
301 /* rotate pattern to correct start position */
302 pat = pat << rot | pat >> (bpp-rot);
307 fill_op = bitfill_unaligned_rev;
310 fill_op = bitfill_unaligned;
313 printk(KERN_ERR "cfb_fillrect(): unknown rop, "
314 "defaulting to ROP_COPY\n");
315 fill_op = bitfill_unaligned;
319 dst += dst_idx >> (ffs(bits) - 1);
320 dst_idx &= (bits - 1);
321 fill_op(dst, dst_idx, pat, left, right,
323 r = (p->fix.line_length*8) % bpp;
324 pat = pat << (bpp-r) | pat >> r;
325 dst_idx += p->fix.line_length*8;
330 EXPORT_SYMBOL(sys_fillrect);
332 MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
333 MODULE_DESCRIPTION("Generic fill rectangle (sys-to-sys)");
334 MODULE_LICENSE("GPL");