1 /*
2 * Copyright 2006 The Android Open Source Project
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "SkCoreBlitters.h"
9 #include "SkColorData.h"
10 #include "SkShader.h"
11 #include "SkXfermodePriv.h"
12
SkA8_Coverage_Blitter(const SkPixmap & device,const SkPaint & paint)13 SkA8_Coverage_Blitter::SkA8_Coverage_Blitter(const SkPixmap& device,
14 const SkPaint& paint) : SkRasterBlitter(device) {
15 SkASSERT(nullptr == paint.getShader());
16 SkASSERT(paint.isSrcOver());
17 SkASSERT(nullptr == paint.getColorFilter());
18 }
19
blitAntiH(int x,int y,const SkAlpha antialias[],const int16_t runs[])20 void SkA8_Coverage_Blitter::blitAntiH(int x, int y, const SkAlpha antialias[],
21 const int16_t runs[]) {
22 uint8_t* device = fDevice.writable_addr8(x, y);
23 SkDEBUGCODE(int totalCount = 0;)
24
25 for (;;) {
26 int count = runs[0];
27 SkASSERT(count >= 0);
28 if (count == 0) {
29 return;
30 }
31 if (antialias[0]) {
32 memset(device, antialias[0], count);
33 }
34 runs += count;
35 antialias += count;
36 device += count;
37
38 SkDEBUGCODE(totalCount += count;)
39 }
40 SkASSERT(fDevice.width() == totalCount);
41 }
42
blitH(int x,int y,int width)43 void SkA8_Coverage_Blitter::blitH(int x, int y, int width) {
44 memset(fDevice.writable_addr8(x, y), 0xFF, width);
45 }
46
blitV(int x,int y,int height,SkAlpha alpha)47 void SkA8_Coverage_Blitter::blitV(int x, int y, int height, SkAlpha alpha) {
48 if (0 == alpha) {
49 return;
50 }
51
52 uint8_t* dst = fDevice.writable_addr8(x, y);
53 const size_t dstRB = fDevice.rowBytes();
54 while (--height >= 0) {
55 *dst = alpha;
56 dst += dstRB;
57 }
58 }
59
blitRect(int x,int y,int width,int height)60 void SkA8_Coverage_Blitter::blitRect(int x, int y, int width, int height) {
61 uint8_t* dst = fDevice.writable_addr8(x, y);
62 const size_t dstRB = fDevice.rowBytes();
63 while (--height >= 0) {
64 memset(dst, 0xFF, width);
65 dst += dstRB;
66 }
67 }
68
blitMask(const SkMask & mask,const SkIRect & clip)69 void SkA8_Coverage_Blitter::blitMask(const SkMask& mask, const SkIRect& clip) {
70 SkASSERT(SkMask::kA8_Format == mask.fFormat);
71
72 int x = clip.fLeft;
73 int y = clip.fTop;
74 int width = clip.width();
75 int height = clip.height();
76
77 uint8_t* dst = fDevice.writable_addr8(x, y);
78 const uint8_t* src = mask.getAddr8(x, y);
79 const size_t srcRB = mask.fRowBytes;
80 const size_t dstRB = fDevice.rowBytes();
81
82 while (--height >= 0) {
83 memcpy(dst, src, width);
84 dst += dstRB;
85 src += srcRB;
86 }
87 }
88
justAnOpaqueColor(uint32_t *)89 const SkPixmap* SkA8_Coverage_Blitter::justAnOpaqueColor(uint32_t*) {
90 return nullptr;
91 }
92