PaintRenderer.java

/*
 * Copyright (C) 2007 The Android Open Source Project
 * Copyright (C) 2011 John Pritchard, Syntelos 
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package ob.droid.term;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.ColorMatrixColorFilter;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.Typeface;

class PaintRenderer extends BaseTextRenderer {
    public PaintRenderer(int fontSize, int forePaintColor, int backPaintColor) {
        super(forePaintColor, backPaintColor);
        mTextPaint = new Paint();
        mTextPaint.setTypeface(Typeface.MONOSPACE);
        mTextPaint.setAntiAlias(true);
        mTextPaint.setTextSize(fontSize);

        mCharHeight = (int) Math.ceil(mTextPaint.getFontSpacing());
        mCharAscent = (int) Math.ceil(mTextPaint.ascent());
        mCharDescent = mCharHeight + mCharAscent;
        mCharWidth = (int) mTextPaint.measureText(EXAMPLE_CHAR, 0, 1);
    }

    public void drawTextRun(Canvas canvas, float x, float y, int lineOffset,
            char[] text, int index, int count,
            boolean cursor, int foreColor, int backColor) {
        if (cursor) {
            mTextPaint.setColor(mCursorPaint);
        } else {
            mTextPaint.setColor(mBackPaint[backColor & 0x7]);
        }
        float left = x + lineOffset * mCharWidth;
        canvas.drawRect(left, y + mCharAscent,
                left + count * mCharWidth, y + mCharDescent,
                mTextPaint);
        boolean bold = ( foreColor & 0x8 ) != 0;
        boolean underline = (backColor & 0x8) != 0;
        if (bold) {
            mTextPaint.setFakeBoldText(true);
        }
        if (underline) {
            mTextPaint.setUnderlineText(true);
        }
        mTextPaint.setColor(mForePaint[foreColor & 0x7]);
        canvas.drawText(text, index, count, left, y, mTextPaint);
        if (bold) {
            mTextPaint.setFakeBoldText(false);
        }
        if (underline) {
            mTextPaint.setUnderlineText(false);
        }
    }

    public int getCharacterHeight() {
        return mCharHeight;
    }

    public int getCharacterWidth() {
        return mCharWidth;
    }


    private Paint mTextPaint;
    private int mCharWidth;
    private int mCharHeight;
    private int mCharAscent;
    private int mCharDescent;
    private static final char[] EXAMPLE_CHAR = {'X'};
}