From 7fe60435bce6595a9c58a9bfd8244d74b5320e96 Mon Sep 17 00:00:00 2001
From: Benjamin Franzke <benjaminfranzke@googlemail.com>
Date: Tue, 15 Jan 2013 08:46:13 +0100
Subject: Import DirectFB141_2k11R3_beta5

---
 Source/DirectFB/src/gfx/generic/stretch_hvx_8.h | 149 ++++++++++++++++++++++++
 1 file changed, 149 insertions(+)
 create mode 100755 Source/DirectFB/src/gfx/generic/stretch_hvx_8.h

(limited to 'Source/DirectFB/src/gfx/generic/stretch_hvx_8.h')

diff --git a/Source/DirectFB/src/gfx/generic/stretch_hvx_8.h b/Source/DirectFB/src/gfx/generic/stretch_hvx_8.h
new file mode 100755
index 0000000..e809304
--- /dev/null
+++ b/Source/DirectFB/src/gfx/generic/stretch_hvx_8.h
@@ -0,0 +1,149 @@
+#ifndef SOURCE_LOOKUP
+#define SOURCE_LOOKUP(x) (x)
+#define SOURCE_LOOKUP_AUTO
+#endif
+
+#ifndef SOURCE_TYPE
+#define SOURCE_TYPE u8
+#define SOURCE_TYPE_AUTO
+#endif
+
+#if 0
+#define HVX_DEBUG(x...)  direct_log_printf( NULL, x )
+#else
+#define HVX_DEBUG(x...)  do {} while (0)
+#endif
+
+/*** OPTIMIZE by doing four pixels at once (vertically) with a 32 bit line buffer ***/
+
+/*static void STRETCH_HVX_YV12( void       *dst,
+                               int         dpitch,
+                               const void *src,
+                               int         spitch,
+                               int         width,
+                               int         height,
+                               int         dst_width,
+                               int         dst_height,
+                               DFBRegion  *clip )*/
+{
+     long  x, y   = 0;
+     long  cw     = clip->x2 - clip->x1 + 1;
+     long  ch     = clip->y2 - clip->y1 + 1;
+     long  hfraq  = ((long)(width  - MINUS_1) << 18) / (long)(dst_width);
+     long  vfraq  = ((long)(height - MINUS_1) << 18) / (long)(dst_height);
+     long  point0 = POINT_0 + clip->x1 * hfraq;
+     long  point  = point0;
+     long  line   = LINE_0 + clip->y1 * vfraq;
+     long  ratios[cw];
+     u8   *dst8;
+
+     u8    _lbT[cw+32];
+     u8    _lbB[cw+32];
+
+     u8   *lbX;
+     u8   *lbT = (u8*)((((ulong)(&_lbT[0])) + 31) & ~31);
+     u8   *lbB = (u8*)((((ulong)(&_lbB[0])) + 31) & ~31);
+
+     long  lineT = -2000;
+
+     for (x=0; x<cw; x++) {
+          ratios[x] = POINT_TO_RATIO( point, hfraq );
+
+          point += hfraq;
+     }
+
+     HVX_DEBUG("%dx%d -> %dx%d  (0x%x, 0x%x)\n", width, height, dst_width, dst_height, hfraq, vfraq );
+
+     dst += clip->x1 + clip->y1 * dpitch;
+
+     dst8 = dst;
+
+     /*
+      * Scale line by line.
+      */
+     for (y=0; y<ch; y++) {
+          long nlT = LINE_T( line, vfraq );
+
+          D_ASSERT( nlT >= 0 );
+          D_ASSERT( nlT < height-1 );
+
+          /*
+           * Fill line buffer(s) ?
+           */
+          if (nlT != lineT) {
+               u8 L, R;
+               const SOURCE_TYPE *srcT = src + spitch * nlT;
+               const SOURCE_TYPE *srcB = src + spitch * (nlT + 1);
+               long               diff = nlT - lineT;
+
+               if (diff > 1) {
+                    /*
+                     * Horizontal interpolation
+                     */
+                    for (x=0, point=point0; x<cw; x++, point += hfraq) {
+                         long pl = POINT_L( point, hfraq );
+                         HVX_DEBUG("%ld,%ld %lu  (%lu/%lu)   0x%x  0x%x\n", x, y, pl,
+                                   POINT_L( point, hfraq ), POINT_R( point, hfraq ), point, ratios[r] );
+                         D_ASSERT( pl >= 0 );
+                         D_ASSERT( pl < width-1 );
+
+                         L = SOURCE_LOOKUP(srcT[pl]);
+                         R = SOURCE_LOOKUP(srcT[pl+1]);
+
+                         lbT[x] = (((R - L) * ratios[x]) >> 8) + L;
+
+                         L = SOURCE_LOOKUP(srcB[pl]);
+                         R = SOURCE_LOOKUP(srcB[pl+1]);
+
+                         lbB[x] = (((R - L) * ratios[x]) >> 8) + L;
+                    }
+               }
+               else {
+                    /* Swap */
+                    lbX = lbT;
+                    lbT = lbB;
+                    lbB = lbX;
+
+                    /*
+                     * Horizontal interpolation
+                     */
+                    for (x=0, point=point0; x<cw; x++, point += hfraq) {
+                         long pl = POINT_L( point, hfraq );
+                         HVX_DEBUG("%ld,%ld %lu  (%lu/%lu)   0x%x  0x%x\n", x, y, pl,
+                                   POINT_L( point, hfraq ), POINT_R( point, hfraq ), point, ratios[r] );
+                         D_ASSERT( pl >= 0 );
+                         D_ASSERT( pl < width-1 );
+
+                         L = SOURCE_LOOKUP(srcB[pl]);
+                         R = SOURCE_LOOKUP(srcB[pl+1]);
+
+                         lbB[x] = (((R - L) * ratios[x]) >> 8) + L;
+                    }
+               }
+
+               lineT = nlT;
+          }
+
+          /*
+           * Vertical interpolation
+           */
+          long X = LINE_TO_RATIO( line, vfraq );
+
+          for (x=0; x<cw; x++)
+               dst8[x] = (((lbB[x] - lbT[x]) * X) >> 8) + lbT[x];
+
+          dst8 += dpitch;
+          line += vfraq;
+     }
+}
+
+#ifdef SOURCE_LOOKUP_AUTO
+#undef SOURCE_LOOKUP_AUTO
+#undef SOURCE_LOOKUP
+#endif
+
+#ifdef SOURCE_TYPE_AUTO
+#undef SOURCE_TYPE_AUTO
+#undef SOURCE_TYPE
+#endif
+
-- 
cgit