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 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 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 43 void SkA8_Coverage_Blitter::blitH(int x, int y, int width) { 44 memset(fDevice.writable_addr8(x, y), 0xFF, width); 45 } 46 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 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 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 89 const SkPixmap* SkA8_Coverage_Blitter::justAnOpaqueColor(uint32_t*) { 90 return nullptr; 91 } 92
