11cab2921ab279367f8206cdadc9259d12e603548Derek Sollenberger 21cab2921ab279367f8206cdadc9259d12e603548Derek Sollenberger/* 31cab2921ab279367f8206cdadc9259d12e603548Derek Sollenberger * Copyright 2006 The Android Open Source Project 41cab2921ab279367f8206cdadc9259d12e603548Derek Sollenberger * 51cab2921ab279367f8206cdadc9259d12e603548Derek Sollenberger * Use of this source code is governed by a BSD-style license that can be 61cab2921ab279367f8206cdadc9259d12e603548Derek Sollenberger * found in the LICENSE file. 71cab2921ab279367f8206cdadc9259d12e603548Derek Sollenberger */ 81cab2921ab279367f8206cdadc9259d12e603548Derek Sollenberger 90910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 100910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project#include "SkCoreBlitters.h" 110910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 120910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source ProjectSkA1_Blitter::SkA1_Blitter(const SkBitmap& device, const SkPaint& paint) 1387b8e645865f9633f410c02252a0fd3feb18f09bDerek Sollenberger : INHERITED(device) { 1487b8e645865f9633f410c02252a0fd3feb18f09bDerek Sollenberger fSrcA = paint.getAlpha(); 150910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project} 160910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 1787b8e645865f9633f410c02252a0fd3feb18f09bDerek Sollenbergervoid SkA1_Blitter::blitH(int x, int y, int width) { 1887b8e645865f9633f410c02252a0fd3feb18f09bDerek Sollenberger SkASSERT(x >= 0 && y >= 0 && 1987b8e645865f9633f410c02252a0fd3feb18f09bDerek Sollenberger (unsigned)(x + width) <= (unsigned)fDevice.width()); 200910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 2187b8e645865f9633f410c02252a0fd3feb18f09bDerek Sollenberger if (fSrcA <= 0x7F) { 220910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project return; 2387b8e645865f9633f410c02252a0fd3feb18f09bDerek Sollenberger } 240910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project uint8_t* dst = fDevice.getAddr1(x, y); 250910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int right = x + width; 260910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 270910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int left_mask = 0xFF >> (x & 7); 280910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int rite_mask = 0xFF << (8 - (right & 7)); 290910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int full_runs = (right >> 3) - ((x + 7) >> 3); 300910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 3187b8e645865f9633f410c02252a0fd3feb18f09bDerek Sollenberger // check for empty right mask, so we don't read off the end 3287b8e645865f9633f410c02252a0fd3feb18f09bDerek Sollenberger // (or go slower than we need to) 3387b8e645865f9633f410c02252a0fd3feb18f09bDerek Sollenberger if (rite_mask == 0) { 340910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project SkASSERT(full_runs >= 0); 350910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project full_runs -= 1; 360910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project rite_mask = 0xFF; 370910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project } 3887b8e645865f9633f410c02252a0fd3feb18f09bDerek Sollenberger if (left_mask == 0xFF) { 390910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project full_runs -= 1; 4087b8e645865f9633f410c02252a0fd3feb18f09bDerek Sollenberger } 4187b8e645865f9633f410c02252a0fd3feb18f09bDerek Sollenberger if (full_runs < 0) { 420910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project SkASSERT((left_mask & rite_mask) != 0); 430910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project *dst |= (left_mask & rite_mask); 4487b8e645865f9633f410c02252a0fd3feb18f09bDerek Sollenberger } else { 450910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project *dst++ |= left_mask; 460910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project memset(dst, 0xFF, full_runs); 470910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project dst += full_runs; 480910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project *dst |= rite_mask; 490910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project } 500910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project} 510910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 52