YUVCanvas.cpp revision db205a1d75c1e9a7d0dbd8fa011335249ad6f4ac 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define LOG_NDEBUG 0
18#define LOG_TAG "YUVCanvas"
19
20#include <media/stagefright/YUVCanvas.h>
21#include <media/stagefright/YUVImage.h>
22#include <ui/Rect.h>
23
24namespace android {
25
26YUVCanvas::YUVCanvas(YUVImage &yuvImage)
27    : mYUVImage(yuvImage) {
28}
29
30YUVCanvas::~YUVCanvas() {
31}
32
33void YUVCanvas::FillYUV(uint8_t yValue, uint8_t uValue, uint8_t vValue) {
34    for (int32_t y = 0; y < mYUVImage.height(); ++y) {
35        for (int32_t x = 0; x < mYUVImage.width(); ++x) {
36            mYUVImage.setPixelValue(x, y, yValue, uValue, vValue);
37        }
38    }
39}
40
41void YUVCanvas::FillYUVRectangle(const Rect& rect,
42        uint8_t yValue, uint8_t uValue, uint8_t vValue) {
43    for (int32_t y = rect.top; y < rect.bottom; ++y) {
44        for (int32_t x = rect.left; x < rect.right; ++x) {
45            mYUVImage.setPixelValue(x, y, yValue, uValue, vValue);
46        }
47    }
48}
49
50void YUVCanvas::CopyImageRect(
51        const Rect& srcRect,
52        int32_t destStartX, int32_t destStartY,
53        const YUVImage &srcImage) {
54
55    // Try fast copy first
56    if (YUVImage::fastCopyRectangle(
57                srcRect,
58                destStartX, destStartY,
59                srcImage, mYUVImage)) {
60        return;
61    }
62
63    int32_t srcStartX = srcRect.left;
64    int32_t srcStartY = srcRect.top;
65    for (int32_t offsetY = 0; offsetY < srcRect.height(); ++offsetY) {
66        for (int32_t offsetX = 0; offsetX < srcRect.width(); ++offsetX) {
67            int32_t srcX = srcStartX + offsetX;
68            int32_t srcY = srcStartY + offsetY;
69
70            int32_t destX = destStartX + offsetX;
71            int32_t destY = destStartY + offsetY;
72
73            uint8_t yValue;
74            uint8_t uValue;
75            uint8_t vValue;
76
77            srcImage.getPixelValue(srcX, srcY, &yValue, &uValue, & vValue);
78            mYUVImage.setPixelValue(destX, destY, yValue, uValue, vValue);
79        }
80    }
81}
82
83}  // namespace android
84