-
/*
* Copyright 2006 The Android Open Source Project
*
* found in the LICENSE file.
*/
-
#ifndef SkBlitter_DEFINED
#define SkBlitter_DEFINED
*/
virtual const SkBitmap* justAnOpaqueColor(uint32_t* value);
+ // (x, y), (x + 1, y)
+ void blitAntiH2(int x, int y, U8CPU a0, U8CPU a1) {
+ int16_t runs[3];
+ uint8_t aa[2];
+
+ runs[0] = 1;
+ runs[1] = 1;
+ runs[2] = 0;
+ aa[0] = SkToU8(a0);
+ aa[1] = SkToU8(a1);
+ this->blitAntiH(x, y, aa, runs);
+ }
+
+ // (x, y), (x, y + 1)
+ void blitAntiV2(int x, int y, U8CPU a0, U8CPU a1) {
+ int16_t runs[2];
+ uint8_t aa[1];
+
+ runs[0] = 1;
+ runs[1] = 0;
+ aa[0] = SkToU8(a0);
+ this->blitAntiH(x, y, aa, runs);
+ // reset in case the clipping blitter modified runs
+ runs[0] = 1;
+ runs[1] = 0;
+ aa[0] = SkToU8(a1);
+ this->blitAntiH(x, y + 1, aa, runs);
+ }
+
/**
* Special method just to identify the null blitter, which is returned
* from Choose() if the request cannot be fulfilled. Default impl
class Horish_SkAntiHairBlitter : public SkAntiHairBlitter {
public:
SkFixed drawCap(int x, SkFixed fy, SkFixed dy, int mod64) override {
- int16_t runs[2];
- uint8_t aa[1];
-
- runs[0] = 1;
- runs[1] = 0;
-
fy += SK_Fixed1/2;
- SkBlitter* blitter = this->getBlitter();
-
+
int lower_y = fy >> 16;
uint8_t a = (uint8_t)(fy >> 8);
- unsigned ma = SmallDot6Scale(a, mod64);
- if (ma) {
- aa[0] = ApplyGamma(gamma, ma);
- blitter->blitAntiH(x, lower_y, aa, runs);
- // the clipping blitters might edit runs, but should not affect us
- SkASSERT(runs[0] == 1);
- SkASSERT(runs[1] == 0);
- }
- ma = SmallDot6Scale(255 - a, mod64);
- if (ma) {
- aa[0] = ApplyGamma(gamma, ma);
- blitter->blitAntiH(x, lower_y - 1, aa, runs);
- // the clipping blitters might edit runs, but should not affect us
- SkASSERT(runs[0] == 1);
- SkASSERT(runs[1] == 0);
- }
- fy += dy;
-
- return fy - SK_Fixed1/2;
+ unsigned a0 = SmallDot6Scale(255 - a, mod64);
+ unsigned a1 = SmallDot6Scale(a, mod64);
+ this->getBlitter()->blitAntiV2(x, lower_y - 1, a0, a1);
+
+ return fy + dy - SK_Fixed1/2;
}
-
+
SkFixed drawLine(int x, int stopx, SkFixed fy, SkFixed dy) override {
SkASSERT(x < stopx);
-
- int16_t runs[2];
- uint8_t aa[1];
-
- runs[0] = 1;
- runs[1] = 0;
-
+
fy += SK_Fixed1/2;
SkBlitter* blitter = this->getBlitter();
do {
int lower_y = fy >> 16;
uint8_t a = (uint8_t)(fy >> 8);
- if (a) {
- aa[0] = a;
- blitter->blitAntiH(x, lower_y, aa, runs);
- // the clipping blitters might edit runs, but should not affect us
- SkASSERT(runs[0] == 1);
- SkASSERT(runs[1] == 0);
- }
- a = 255 - a;
- if (a) {
- aa[0] = a;
- blitter->blitAntiH(x, lower_y - 1, aa, runs);
- // the clipping blitters might edit runs, but should not affect us
- SkASSERT(runs[0] == 1);
- SkASSERT(runs[1] == 0);
- }
+ blitter->blitAntiV2(x, lower_y - 1, 255 - a, a);
fy += dy;
} while (++x < stopx);
-
+
return fy - SK_Fixed1/2;
}
};
class Vertish_SkAntiHairBlitter : public SkAntiHairBlitter {
public:
SkFixed drawCap(int y, SkFixed fx, SkFixed dx, int mod64) override {
- int16_t runs[3];
- uint8_t aa[2];
-
- runs[0] = 1;
- runs[2] = 0;
-
fx += SK_Fixed1/2;
+
int x = fx >> 16;
- uint8_t a = (uint8_t)(fx >> 8);
-
- aa[0] = SmallDot6Scale(255 - a, mod64);
- aa[1] = SmallDot6Scale(a, mod64);
- // the clippng blitters might overwrite this guy, so we have to reset it each time
- runs[1] = 1;
- this->getBlitter()->blitAntiH(x - 1, y, aa, runs);
- // the clipping blitters might edit runs, but should not affect us
- SkASSERT(runs[0] == 1);
- SkASSERT(runs[2] == 0);
- fx += dx;
-
- return fx - SK_Fixed1/2;
+ uint8_t a = (uint8_t)(fx >> 8);
+ this->getBlitter()->blitAntiH2(x - 1, y,
+ SmallDot6Scale(255 - a, mod64), SmallDot6Scale(a, mod64));
+
+ return fx + dx - SK_Fixed1/2;
}
-
+
SkFixed drawLine(int y, int stopy, SkFixed fx, SkFixed dx) override {
SkASSERT(y < stopy);
- int16_t runs[3];
- uint8_t aa[2];
-
- runs[0] = 1;
- runs[2] = 0;
-
fx += SK_Fixed1/2;
do {
int x = fx >> 16;
- uint8_t a = (uint8_t)(fx >> 8);
-
- aa[0] = 255 - a;
- aa[1] = a;
- // the clippng blitters might overwrite this guy, so we have to reset it each time
- runs[1] = 1;
- this->getBlitter()->blitAntiH(x - 1, y, aa, runs);
- // the clipping blitters might edit runs, but should not affect us
- SkASSERT(runs[0] == 1);
- SkASSERT(runs[2] == 0);
+ uint8_t a = (uint8_t)(fx >> 8);
+ this->getBlitter()->blitAntiH2(x - 1, y, 255 - a, a);
fx += dx;
} while (++y < stopy);
-
+
return fx - SK_Fixed1/2;
}
};