draw: Purge old (fast but too ugly) image scaling code.

1 files changed, 0 insertions, 307 deletions

diff --git a/draw/imagescale.c b/draw/imagescale.c
deleted file mode 100644
index d40898b1..00000000
--- a/draw/imagescale.c
+++ /dev/null
@@ -1,307 +0,0 @@
-#include "fitz.h"
-
-typedef unsigned char byte;
-
-static inline void srown(byte * restrict src, byte * restrict dst, int w, int denom, int n)
-{
-	int invdenom = (1<<16) / denom;
-	int x, left, k;
-	unsigned sum[FZ_MAXCOLORS];
-
-	left = 0;
-	for (k = 0; k < n; k++)
-		sum[k] = 0;
-
-	for (x = 0; x < w; x++)
-	{
-		for (k = 0; k < n; k++)
-			sum[k] += src[x * n + k];
-		if (++left == denom)
-		{
-			left = 0;
-			for (k = 0; k < n; k++)
-			{
-				dst[k] = (sum[k] * invdenom + (1<<15)) >> 16;
-				sum[k] = 0;
-			}
-			dst += n;
-		}
-	}
-
-	/* left overs */
-	if (left)
-		for (k = 0; k < n; k++)
-			dst[k] = sum[k] / left;
-}
-
-/* special-case common 1-5 components - the compiler optimizes this */
-static inline void srowc(byte * restrict src, byte * restrict dst, int w, int denom, int n)
-{
-	int invdenom = (1<<16) / denom;
-	int x, left;
-	unsigned sum1 = 0;
-	unsigned sum2 = 0;
-	unsigned sum3 = 0;
-	unsigned sum4 = 0;
-	unsigned sum5 = 0;
-
-	assert(n <= 5);
-
-	left = denom;
-
-	for (x = w; x > 0; x--)
-	{
-		sum1 += *src++;
-		/* the compiler eliminates these if-tests */
-		if (n >= 2)
-			sum2 += *src++;
-		if (n >= 3)
-			sum3 += *src++;
-		if (n >= 4)
-			sum4 += *src++;
-		if (n >= 5)
-			sum5 += *src++;
-
-		if (--left == 0)
-		{
-			left = denom;
-
-			*dst++ = (sum1 * invdenom + (1<<15)) >> 16;
-			sum1 = 0;
-			if (n >= 2) {
-				*dst++ = (sum2 * invdenom + (1<<15)) >> 16;
-				sum2 = 0;
-			}
-			if (n >= 3) {
-				*dst++ = (sum3 * invdenom + (1<<15)) >> 16;
-				sum3 = 0;
-			}
-			if (n >= 4) {
-				*dst++ = (sum4 * invdenom + (1<<15)) >> 16;
-				sum4 = 0;
-			}
-			if (n >= 5) {
-				*dst++ = (sum5 * invdenom + (1<<15)) >> 16;
-				sum5 = 0;
-			}
-		}
-	}
-
-	/* left overs */
-	left = denom - left;
-	if (left) {
-		*dst++ = sum1 / left;
-		if (n >= 2)
-			*dst++ = sum2 / left;
-		if (n >= 3)
-			*dst++ = sum3 / left;
-		if (n >= 4)
-			*dst++ = sum4 / left;
-		if (n >= 5)
-			*dst++ = sum5 / left;
-	}
-}
-
-static void srow1(byte * restrict src, byte * restrict dst, int w, int denom)
-{
-	srowc(src, dst, w, denom, 1);
-}
-
-static void srow2(byte * restrict src, byte * restrict dst, int w, int denom)
-{
-	srowc(src, dst, w, denom, 2);
-}
-
-static void srow4(byte * restrict src, byte * restrict dst, int w, int denom)
-{
-	srowc(src, dst, w, denom, 4);
-}
-
-static void srow5(byte * restrict src, byte * restrict dst, int w, int denom)
-{
-	srowc(src, dst, w, denom, 5);
-}
-
-static inline void scoln(byte * restrict src, byte * restrict dst, int w, int denom, int n)
-{
-	int invdenom = (1<<16) / denom;
-	int x, y, k;
-	byte *s;
-	int sum[FZ_MAXCOLORS];
-
-	for (x = 0; x < w; x++)
-	{
-		s = src + (x * n);
-		for (k = 0; k < n; k++)
-			sum[k] = 0;
-		for (y = 0; y < denom; y++)
-			for (k = 0; k < n; k++)
-				sum[k] += s[y * w * n + k];
-		for (k = 0; k < n; k++)
-			dst[k] = (sum[k] * invdenom + (1<<15)) >> 16;
-		dst += n;
-	}
-}
-
-static inline void scolc(byte * restrict src, byte * restrict dst, int w, int denom, int n)
-{
-	int invdenom = (1<<16) / denom;
-	int x, y;
-	int sum0;
-	int sum1;
-	int sum2;
-	int sum3;
-	int sum4;
-
-	assert(n <= 5);
-
-	x = w;
-	w *= n;
-	for (; x > 0; x--)
-	{
-		sum0 = 0;
-		sum1 = 0;
-		sum2 = 0;
-		sum3 = 0;
-		sum4 = 0;
-		for (y = denom; y > 0; y--)
-		{
-			sum0 += src[0];
-			if (n >= 2)
-				sum1 += src[1];
-			if (n >= 3)
-				sum2 += src[2];
-			if (n >= 4)
-				sum3 += src[3];
-			if (n >= 5)
-				sum4 += src[4];
-			src += w;
-		}
-		src += n - denom * w;
-		*dst++ = (sum0 * invdenom + (1<<15)) >> 16;
-		if (n >= 2)
-			*dst++ = (sum1 * invdenom + (1<<15)) >> 16;
-		if (n >= 3)
-			*dst++ = (sum2 * invdenom + (1<<15)) >> 16;
-		if (n >= 4)
-			*dst++ = (sum3 * invdenom + (1<<15)) >> 16;
-		if (n >= 5)
-			*dst++ = (sum4 * invdenom + (1<<15)) >> 16;
-	}
-}
-
-static void scol1(byte * restrict src, byte * restrict dst, int w, int denom)
-{
-	scolc(src, dst, w, denom, 1);
-}
-
-static void scol2(byte * restrict src, byte * restrict dst, int w, int denom)
-{
-	scolc(src, dst, w, denom, 2);
-}
-
-static void scol4(byte * restrict src, byte * restrict dst, int w, int denom)
-{
-	scolc(src, dst, w, denom, 4);
-}
-
-static void scol5(byte * restrict src, byte * restrict dst, int w, int denom)
-{
-	scolc(src, dst, w, denom, 5);
-}
-
-void (*fz_srown)(byte *restrict, byte *restrict, int w, int denom, int n) = srown;
-void (*fz_srow1)(byte *restrict, byte *restrict, int w, int denom) = srow1;
-void (*fz_srow2)(byte *restrict, byte *restrict, int w, int denom) = srow2;
-void (*fz_srow4)(byte *restrict, byte *restrict, int w, int denom) = srow4;
-void (*fz_srow5)(byte *restrict, byte *restrict, int w, int denom) = srow5;
-
-void (*fz_scoln)(byte *restrict, byte *restrict, int w, int denom, int n) = scoln;
-void (*fz_scol1)(byte *restrict, byte *restrict, int w, int denom) = scol1;
-void (*fz_scol2)(byte *restrict, byte *restrict, int w, int denom) = scol2;
-void (*fz_scol4)(byte *restrict, byte *restrict, int w, int denom) = scol4;
-void (*fz_scol5)(byte *restrict, byte *restrict, int w, int denom) = scol5;
-
-fz_pixmap *
-fz_scalepixmap(fz_pixmap *src, int xdenom, int ydenom)
-{
-	fz_pixmap *dst;
-	unsigned char *buf;
-	int y, iy, oy;
-	int ow, oh, n;
-	int remaining;
-
-	void (*srowx)(byte * restrict src, byte * restrict dst, int w, int denom) = nil;
-	void (*scolx)(byte * restrict src, byte * restrict dst, int w, int denom) = nil;
-
-	ow = (src->w + xdenom - 1) / xdenom;
-	oh = (src->h + ydenom - 1) / ydenom;
-	n = src->n;
-
-	buf = fz_calloc(ydenom, ow * n);
-
-	dst = fz_newpixmap(src->colorspace, 0, 0, ow, oh);
-
-	switch (n)
-	{
-	case 1: srowx = fz_srow1; scolx = fz_scol1; break;
-	case 2: srowx = fz_srow2; scolx = fz_scol2; break;
-	case 4: srowx = fz_srow4; scolx = fz_scol4; break;
-	case 5: srowx = fz_srow5; scolx = fz_scol5; break;
-	}
-
-	if (srowx && scolx)
-	{
-		for (y = 0, oy = 0; y < (src->h / ydenom) * ydenom; y += ydenom, oy++)
-		{
-			for (iy = 0; iy < ydenom; iy++)
-			{
-				srowx(src->samples + (y + iy) * src->w * n,
-					buf + iy * ow * n,
-					src->w, xdenom);
-			}
-			scolx(buf, dst->samples + oy * dst->w * n, dst->w, ydenom);
-		}
-
-		remaining = src->h - y;
-		if (remaining)
-		{
-			for (iy = 0; iy < remaining; iy++)
-			{
-				srowx(src->samples + (y + iy) * src->w * n,
-					buf + iy * ow * n,
-					src->w, xdenom);
-			}
-			scolx(buf, dst->samples + oy * dst->w * n, dst->w, remaining);
-		}
-	}
-
-	else
-	{
-		for (y = 0, oy = 0; y < (src->h / ydenom) * ydenom; y += ydenom, oy++)
-		{
-			for (iy = 0; iy < ydenom; iy++)
-			{
-				fz_srown(src->samples + (y + iy) * src->w * n,
-					buf + iy * ow * n,
-					src->w, xdenom, n);
-			}
-			fz_scoln(buf, dst->samples + oy * dst->w * n, dst->w, ydenom, n);
-		}
-
-		remaining = src->h - y;
-		if (remaining)
-		{
-			for (iy = 0; iy < remaining; iy++)
-			{
-				fz_srown(src->samples + (y + iy) * src->w * n,
-					buf + iy * ow * n,
-					src->w, xdenom, n);
-			}
-			fz_scoln(buf, dst->samples + oy * dst->w * n, dst->w, remaining, n);
-		}
-	}
-
-	fz_free(buf);
-	return dst;
-}