summaryrefslogtreecommitdiffstats
path: root/drivers/video/fbdev/core/cfbfillrect.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/video/fbdev/core/cfbfillrect.c')
-rw-r--r--drivers/video/fbdev/core/cfbfillrect.c371
1 files changed, 371 insertions, 0 deletions
diff --git a/drivers/video/fbdev/core/cfbfillrect.c b/drivers/video/fbdev/core/cfbfillrect.c
new file mode 100644
index 000000000000..ba9f58b2a5e8
--- /dev/null
+++ b/drivers/video/fbdev/core/cfbfillrect.c
@@ -0,0 +1,371 @@
+/*
+ * Generic fillrect for frame buffers with packed pixels of any depth.
+ *
+ * Copyright (C) 2000 James Simmons (jsimmons@linux-fbdev.org)
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive for
+ * more details.
+ *
+ * NOTES:
+ *
+ * Also need to add code to deal with cards endians that are different than
+ * the native cpu endians. I also need to deal with MSB position in the word.
+ *
+ */
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/fb.h>
+#include <asm/types.h>
+#include "fb_draw.h"
+
+#if BITS_PER_LONG == 32
+# define FB_WRITEL fb_writel
+# define FB_READL fb_readl
+#else
+# define FB_WRITEL fb_writeq
+# define FB_READL fb_readq
+#endif
+
+ /*
+ * Aligned pattern fill using 32/64-bit memory accesses
+ */
+
+static void
+bitfill_aligned(struct fb_info *p, unsigned long __iomem *dst, int dst_idx,
+ unsigned long pat, unsigned n, int bits, u32 bswapmask)
+{
+ unsigned long first, last;
+
+ if (!n)
+ return;
+
+ first = fb_shifted_pixels_mask_long(p, dst_idx, bswapmask);
+ last = ~fb_shifted_pixels_mask_long(p, (dst_idx+n) % bits, bswapmask);
+
+ if (dst_idx+n <= bits) {
+ // Single word
+ if (last)
+ first &= last;
+ FB_WRITEL(comp(pat, FB_READL(dst), first), dst);
+ } else {
+ // Multiple destination words
+
+ // Leading bits
+ if (first!= ~0UL) {
+ FB_WRITEL(comp(pat, FB_READL(dst), first), dst);
+ dst++;
+ n -= bits - dst_idx;
+ }
+
+ // Main chunk
+ n /= bits;
+ while (n >= 8) {
+ FB_WRITEL(pat, dst++);
+ FB_WRITEL(pat, dst++);
+ FB_WRITEL(pat, dst++);
+ FB_WRITEL(pat, dst++);
+ FB_WRITEL(pat, dst++);
+ FB_WRITEL(pat, dst++);
+ FB_WRITEL(pat, dst++);
+ FB_WRITEL(pat, dst++);
+ n -= 8;
+ }
+ while (n--)
+ FB_WRITEL(pat, dst++);
+
+ // Trailing bits
+ if (last)
+ FB_WRITEL(comp(pat, FB_READL(dst), last), dst);
+ }
+}
+
+
+ /*
+ * Unaligned generic pattern fill using 32/64-bit memory accesses
+ * The pattern must have been expanded to a full 32/64-bit value
+ * Left/right are the appropriate shifts to convert to the pattern to be
+ * used for the next 32/64-bit word
+ */
+
+static void
+bitfill_unaligned(struct fb_info *p, unsigned long __iomem *dst, int dst_idx,
+ unsigned long pat, int left, int right, unsigned n, int bits)
+{
+ unsigned long first, last;
+
+ if (!n)
+ return;
+
+ first = FB_SHIFT_HIGH(p, ~0UL, dst_idx);
+ last = ~(FB_SHIFT_HIGH(p, ~0UL, (dst_idx+n) % bits));
+
+ if (dst_idx+n <= bits) {
+ // Single word
+ if (last)
+ first &= last;
+ FB_WRITEL(comp(pat, FB_READL(dst), first), dst);
+ } else {
+ // Multiple destination words
+ // Leading bits
+ if (first) {
+ FB_WRITEL(comp(pat, FB_READL(dst), first), dst);
+ dst++;
+ pat = pat << left | pat >> right;
+ n -= bits - dst_idx;
+ }
+
+ // Main chunk
+ n /= bits;
+ while (n >= 4) {
+ FB_WRITEL(pat, dst++);
+ pat = pat << left | pat >> right;
+ FB_WRITEL(pat, dst++);
+ pat = pat << left | pat >> right;
+ FB_WRITEL(pat, dst++);
+ pat = pat << left | pat >> right;
+ FB_WRITEL(pat, dst++);
+ pat = pat << left | pat >> right;
+ n -= 4;
+ }
+ while (n--) {
+ FB_WRITEL(pat, dst++);
+ pat = pat << left | pat >> right;
+ }
+
+ // Trailing bits
+ if (last)
+ FB_WRITEL(comp(pat, FB_READL(dst), last), dst);
+ }
+}
+
+ /*
+ * Aligned pattern invert using 32/64-bit memory accesses
+ */
+static void
+bitfill_aligned_rev(struct fb_info *p, unsigned long __iomem *dst,
+ int dst_idx, unsigned long pat, unsigned n, int bits,
+ u32 bswapmask)
+{
+ unsigned long val = pat, dat;
+ unsigned long first, last;
+
+ if (!n)
+ return;
+
+ first = fb_shifted_pixels_mask_long(p, dst_idx, bswapmask);
+ last = ~fb_shifted_pixels_mask_long(p, (dst_idx+n) % bits, bswapmask);
+
+ if (dst_idx+n <= bits) {
+ // Single word
+ if (last)
+ first &= last;
+ dat = FB_READL(dst);
+ FB_WRITEL(comp(dat ^ val, dat, first), dst);
+ } else {
+ // Multiple destination words
+ // Leading bits
+ if (first!=0UL) {
+ dat = FB_READL(dst);
+ FB_WRITEL(comp(dat ^ val, dat, first), dst);
+ dst++;
+ n -= bits - dst_idx;
+ }
+
+ // Main chunk
+ n /= bits;
+ while (n >= 8) {
+ FB_WRITEL(FB_READL(dst) ^ val, dst);
+ dst++;
+ FB_WRITEL(FB_READL(dst) ^ val, dst);
+ dst++;
+ FB_WRITEL(FB_READL(dst) ^ val, dst);
+ dst++;
+ FB_WRITEL(FB_READL(dst) ^ val, dst);
+ dst++;
+ FB_WRITEL(FB_READL(dst) ^ val, dst);
+ dst++;
+ FB_WRITEL(FB_READL(dst) ^ val, dst);
+ dst++;
+ FB_WRITEL(FB_READL(dst) ^ val, dst);
+ dst++;
+ FB_WRITEL(FB_READL(dst) ^ val, dst);
+ dst++;
+ n -= 8;
+ }
+ while (n--) {
+ FB_WRITEL(FB_READL(dst) ^ val, dst);
+ dst++;
+ }
+ // Trailing bits
+ if (last) {
+ dat = FB_READL(dst);
+ FB_WRITEL(comp(dat ^ val, dat, last), dst);
+ }
+ }
+}
+
+
+ /*
+ * Unaligned generic pattern invert using 32/64-bit memory accesses
+ * The pattern must have been expanded to a full 32/64-bit value
+ * Left/right are the appropriate shifts to convert to the pattern to be
+ * used for the next 32/64-bit word
+ */
+
+static void
+bitfill_unaligned_rev(struct fb_info *p, unsigned long __iomem *dst,
+ int dst_idx, unsigned long pat, int left, int right,
+ unsigned n, int bits)
+{
+ unsigned long first, last, dat;
+
+ if (!n)
+ return;
+
+ first = FB_SHIFT_HIGH(p, ~0UL, dst_idx);
+ last = ~(FB_SHIFT_HIGH(p, ~0UL, (dst_idx+n) % bits));
+
+ if (dst_idx+n <= bits) {
+ // Single word
+ if (last)
+ first &= last;
+ dat = FB_READL(dst);
+ FB_WRITEL(comp(dat ^ pat, dat, first), dst);
+ } else {
+ // Multiple destination words
+
+ // Leading bits
+ if (first != 0UL) {
+ dat = FB_READL(dst);
+ FB_WRITEL(comp(dat ^ pat, dat, first), dst);
+ dst++;
+ pat = pat << left | pat >> right;
+ n -= bits - dst_idx;
+ }
+
+ // Main chunk
+ n /= bits;
+ while (n >= 4) {
+ FB_WRITEL(FB_READL(dst) ^ pat, dst);
+ dst++;
+ pat = pat << left | pat >> right;
+ FB_WRITEL(FB_READL(dst) ^ pat, dst);
+ dst++;
+ pat = pat << left | pat >> right;
+ FB_WRITEL(FB_READL(dst) ^ pat, dst);
+ dst++;
+ pat = pat << left | pat >> right;
+ FB_WRITEL(FB_READL(dst) ^ pat, dst);
+ dst++;
+ pat = pat << left | pat >> right;
+ n -= 4;
+ }
+ while (n--) {
+ FB_WRITEL(FB_READL(dst) ^ pat, dst);
+ dst++;
+ pat = pat << left | pat >> right;
+ }
+
+ // Trailing bits
+ if (last) {
+ dat = FB_READL(dst);
+ FB_WRITEL(comp(dat ^ pat, dat, last), dst);
+ }
+ }
+}
+
+void cfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
+{
+ unsigned long pat, pat2, fg;
+ unsigned long width = rect->width, height = rect->height;
+ int bits = BITS_PER_LONG, bytes = bits >> 3;
+ u32 bpp = p->var.bits_per_pixel;
+ unsigned long __iomem *dst;
+ int dst_idx, left;
+
+ if (p->state != FBINFO_STATE_RUNNING)
+ return;
+
+ if (p->fix.visual == FB_VISUAL_TRUECOLOR ||
+ p->fix.visual == FB_VISUAL_DIRECTCOLOR )
+ fg = ((u32 *) (p->pseudo_palette))[rect->color];
+ else
+ fg = rect->color;
+
+ pat = pixel_to_pat(bpp, fg);
+
+ dst = (unsigned long __iomem *)((unsigned long)p->screen_base & ~(bytes-1));
+ dst_idx = ((unsigned long)p->screen_base & (bytes - 1))*8;
+ dst_idx += rect->dy*p->fix.line_length*8+rect->dx*bpp;
+ /* FIXME For now we support 1-32 bpp only */
+ left = bits % bpp;
+ if (p->fbops->fb_sync)
+ p->fbops->fb_sync(p);
+ if (!left) {
+ u32 bswapmask = fb_compute_bswapmask(p);
+ void (*fill_op32)(struct fb_info *p,
+ unsigned long __iomem *dst, int dst_idx,
+ unsigned long pat, unsigned n, int bits,
+ u32 bswapmask) = NULL;
+
+ switch (rect->rop) {
+ case ROP_XOR:
+ fill_op32 = bitfill_aligned_rev;
+ break;
+ case ROP_COPY:
+ fill_op32 = bitfill_aligned;
+ break;
+ default:
+ printk( KERN_ERR "cfb_fillrect(): unknown rop, defaulting to ROP_COPY\n");
+ fill_op32 = bitfill_aligned;
+ break;
+ }
+ while (height--) {
+ dst += dst_idx >> (ffs(bits) - 1);
+ dst_idx &= (bits - 1);
+ fill_op32(p, dst, dst_idx, pat, width*bpp, bits,
+ bswapmask);
+ dst_idx += p->fix.line_length*8;
+ }
+ } else {
+ int right, r;
+ void (*fill_op)(struct fb_info *p, unsigned long __iomem *dst,
+ int dst_idx, unsigned long pat, int left,
+ int right, unsigned n, int bits) = NULL;
+#ifdef __LITTLE_ENDIAN
+ right = left;
+ left = bpp - right;
+#else
+ right = bpp - left;
+#endif
+ switch (rect->rop) {
+ case ROP_XOR:
+ fill_op = bitfill_unaligned_rev;
+ break;
+ case ROP_COPY:
+ fill_op = bitfill_unaligned;
+ break;
+ default:
+ printk(KERN_ERR "cfb_fillrect(): unknown rop, defaulting to ROP_COPY\n");
+ fill_op = bitfill_unaligned;
+ break;
+ }
+ while (height--) {
+ dst += dst_idx / bits;
+ dst_idx &= (bits - 1);
+ r = dst_idx % bpp;
+ /* rotate pattern to the correct start position */
+ pat2 = le_long_to_cpu(rolx(cpu_to_le_long(pat), r, bpp));
+ fill_op(p, dst, dst_idx, pat2, left, right,
+ width*bpp, bits);
+ dst_idx += p->fix.line_length*8;
+ }
+ }
+}
+
+EXPORT_SYMBOL(cfb_fillrect);
+
+MODULE_AUTHOR("James Simmons <jsimmons@users.sf.net>");
+MODULE_DESCRIPTION("Generic software accelerated fill rectangle");
+MODULE_LICENSE("GPL");
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-04-28 00:51:11 +0000