forgot file

1 files changed, 92 insertions, 0 deletions

diff --git a/src/scale.c b/src/scale.c
new file mode 100644
index 0000000..cbda1ad
--- /dev/null
+++ b/src/scale.c
@@ -0,0 +1,92 @@
+
+#include <stdint.h>
+#include <sys/time.h>
+#include "meh.h"
+
+#define GETVAL(x, c) (( \
+			( \
+				ibuf[(x) * 3 + (c)] * (ur) + \
+				ibuf[(x) * 3 + 3+(c)] * (u) \
+			) * (vr) + \
+			( \
+				(ibufn[(x) * 3 + (c)]) * (ur) + \
+				(ibufn[(x) * 3 + 3+(c)]) * (u)\
+			) * (v)) >> 20)
+
+
+void scale(struct image *img, XImage *ximg){
+	int x, y;
+	unsigned char * __restrict__ ibuf;
+	unsigned char * __restrict__ ibufn;
+	char* __restrict__ newBuf = ximg->data;
+	unsigned int jdy = ximg->bytes_per_line / 4 - ximg->width;
+
+//	struct timeval t0;
+//	struct timeval t1;
+//	gettimeofday(&t0, NULL);
+
+	unsigned int bufxs[ximg->width];
+	unsigned int us[ximg->width];
+	{
+		unsigned int dx = (img->bufwidth << 10) / ximg->width;
+		unsigned int bufx = img->bufwidth / ximg->width;
+		for(x = 0; x < ximg->width; x++){
+			bufxs[x] = bufx >> 10;
+			us[x] = (bufx & 1023);
+			bufx += dx;
+		}
+	}
+
+	for(y = 0; y < ximg->height; y++){
+		unsigned int bufy = (y << 10) * img->bufheight / ximg->height;
+		unsigned int v = (bufy & 1023);
+		unsigned int vr = 1023^(bufy & 1023);
+		ibuf = &img->buf[y * img->bufheight / ximg->height * img->bufwidth * 3];
+		ibufn = &img->buf[(y * img->bufheight / ximg->height + 1) * img->bufwidth * 3];
+		for(x = 0; x < ximg->width; x++){
+			unsigned int bufx = bufxs[x];
+			unsigned int u = us[x];
+			unsigned int ur = 1023^u;
+
+			*newBuf++ = GETVAL(bufx, 2);
+			*newBuf++ = GETVAL(bufx, 1);
+			*newBuf++ = GETVAL(bufx, 0);
+			newBuf++;
+		}
+		newBuf += jdy;
+	}
+
+//	gettimeofday(&t1, NULL);
+//	printf("%li ms\n", ((t1.tv_sec - t0.tv_sec) * 1000000 + t1.tv_usec - t0.tv_usec) / 1000);
+}
+
+void linearscale(struct image *img, XImage *ximg){
+	int x, y;
+	unsigned char * __restrict__ ibuf;
+	char* __restrict__ newBuf = ximg->data;
+	unsigned int jdy = ximg->bytes_per_line / 4 - ximg->width;
+	unsigned int dx = (img->bufwidth << 10) / ximg->width;
+
+//	struct timeval t0;
+//	struct timeval t1;
+//	gettimeofday(&t0, NULL);
+
+	for(y = 0; y < ximg->height; y++){
+		unsigned int bufx = img->bufwidth / ximg->width;
+		ibuf = &img->buf[y * img->bufheight / ximg->height * img->bufwidth * 3];
+
+		for(x = 0; x < ximg->width; x++){
+			*newBuf++ = (ibuf[(bufx >> 10)*3+2]);
+			*newBuf++ = (ibuf[(bufx >> 10)*3+1]);
+			*newBuf++ = (ibuf[(bufx >> 10)*3+0]);
+			newBuf++;
+			bufx += dx;
+		}
+		newBuf += jdy;
+	}
+
+//	gettimeofday(&t1, NULL);
+//	printf("%i\n", ((t1.tv_sec - t0.tv_sec) * 1000000 + t1.tv_usec - t0.tv_usec) / 10);
+}
+
+