create inline version of setLine that assumes no clip. 10% faster for dashing gms
Review URL: https://codereview.appspot.com/6455078
git-svn-id: http://skia.googlecode.com/svn/trunk@4920 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/core/SkEdge.h b/src/core/SkEdge.h
index 575b602..22a26d0 100644
--- a/src/core/SkEdge.h
+++ b/src/core/SkEdge.h
@@ -11,6 +11,8 @@
#define SkEdge_DEFINED
#include "SkRect.h"
+#include "SkFDot6.h"
+#include "SkMath.h"
struct SkEdge {
enum Type {
@@ -33,6 +35,8 @@
int setLine(const SkPoint& p0, const SkPoint& p1, const SkIRect* clip,
int shiftUp);
+ // call this version if you know you don't have a clip
+ inline int setLine(const SkPoint& p0, const SkPoint& p1, int shiftUp);
inline int updateLine(SkFixed ax, SkFixed ay, SkFixed bx, SkFixed by);
void chopLineWithClip(const SkIRect& clip);
@@ -78,4 +82,52 @@
int updateCubic();
};
+int SkEdge::setLine(const SkPoint& p0, const SkPoint& p1, int shift) {
+ SkFDot6 x0, y0, x1, y1;
+
+ {
+#ifdef SK_SCALAR_IS_FLOAT
+ float scale = float(1 << (shift + 6));
+ x0 = int(p0.fX * scale);
+ y0 = int(p0.fY * scale);
+ x1 = int(p1.fX * scale);
+ y1 = int(p1.fY * scale);
+#else
+ shift = 10 - shift;
+ x0 = p0.fX >> shift;
+ y0 = p0.fY >> shift;
+ x1 = p1.fX >> shift;
+ y1 = p1.fY >> shift;
+#endif
+ }
+
+ int winding = 1;
+
+ if (y0 > y1) {
+ SkTSwap(x0, x1);
+ SkTSwap(y0, y1);
+ winding = -1;
+ }
+
+ int top = SkFDot6Round(y0);
+ int bot = SkFDot6Round(y1);
+
+ // are we a zero-height line?
+ if (top == bot) {
+ return 0;
+ }
+
+ SkFixed slope = SkFDot6Div(x1 - x0, y1 - y0);
+
+ fX = SkFDot6ToFixed(x0 + SkFixedMul(slope, (32 - y0) & 63)); // + SK_Fixed1/2
+ fDX = slope;
+ fFirstY = top;
+ fLastY = bot - 1;
+ fCurveCount = 0;
+ fWinding = SkToS8(winding);
+ fCurveShift = 0;
+ return 1;
+}
+
+
#endif