2019-11-23 20:27:39 +08:00
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/****************************************************************************
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Copyright (c) 2010-2012 cocos2d-x.org
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Copyright (c) 2013-2016 Chukong Technologies Inc.
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Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
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2022-07-09 07:07:01 +08:00
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https://adxeproject.github.io/
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2019-11-23 20:27:39 +08:00
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#include <string.h>
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#include <stdlib.h>
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#include "base/TGAlib.h"
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#include "base/CCData.h"
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#include "platform/CCFileUtils.h"
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NS_CC_BEGIN
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2021-12-25 10:04:45 +08:00
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static bool tgaLoadRLEImageData(unsigned char* Buffer, uint32_t bufSize, tImageTGA* info);
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void tgaFlipImage(tImageTGA* info);
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2019-11-23 20:27:39 +08:00
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// load the image header field from stream
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2021-12-25 10:04:45 +08:00
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bool tgaLoadHeader(unsigned char* buffer, uint32_t bufSize, tImageTGA* info)
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2019-11-23 20:27:39 +08:00
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{
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bool ret = false;
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2021-12-25 10:04:45 +08:00
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do
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2019-11-23 20:27:39 +08:00
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{
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size_t step = sizeof(unsigned char) * 2;
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CC_BREAK_IF((step + sizeof(unsigned char)) > bufSize);
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memcpy(&info->type, buffer + step, sizeof(unsigned char));
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step += sizeof(unsigned char) * 2;
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step += sizeof(signed short) * 4;
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CC_BREAK_IF((step + sizeof(signed short) * 2 + sizeof(unsigned char)) > bufSize);
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memcpy(&info->width, buffer + step, sizeof(signed short));
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memcpy(&info->height, buffer + step + sizeof(signed short), sizeof(signed short));
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memcpy(&info->pixelDepth, buffer + step + sizeof(signed short) * 2, sizeof(unsigned char));
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step += sizeof(unsigned char);
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step += sizeof(signed short) * 2;
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CC_BREAK_IF((step + sizeof(unsigned char)) > bufSize);
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unsigned char cGarbage;
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memcpy(&cGarbage, buffer + step, sizeof(unsigned char));
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info->flipped = 0;
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2021-12-25 10:04:45 +08:00
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if (cGarbage & 0x20)
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2019-11-23 20:27:39 +08:00
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{
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info->flipped = 1;
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}
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ret = true;
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} while (0);
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return ret;
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}
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2021-12-25 10:04:45 +08:00
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bool tgaLoadImageData(unsigned char* Buffer, uint32_t bufSize, tImageTGA* info)
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2019-11-23 20:27:39 +08:00
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{
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bool ret = false;
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2021-12-25 10:04:45 +08:00
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do
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2019-11-23 20:27:39 +08:00
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{
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2021-12-25 10:04:45 +08:00
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int mode, total, i;
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2019-11-23 20:27:39 +08:00
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unsigned char aux;
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size_t step = (sizeof(unsigned char) + sizeof(signed short)) * 6;
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// mode equal the number of components for each pixel
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mode = info->pixelDepth / 8;
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// total is the number of unsigned chars we'll have to read
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total = info->height * info->width * mode;
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size_t dataSize = sizeof(unsigned char) * total;
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CC_BREAK_IF((step + dataSize) > bufSize);
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memcpy(info->imageData, Buffer + step, dataSize);
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// mode=3 or 4 implies that the image is RGB(A). However TGA
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// stores it as BGR(A) so we'll have to swap R and B.
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if (mode >= 3)
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{
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2021-12-25 10:04:45 +08:00
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for (i = 0; i < total; i += mode)
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2019-11-23 20:27:39 +08:00
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{
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2021-12-25 10:04:45 +08:00
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aux = info->imageData[i];
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info->imageData[i] = info->imageData[i + 2];
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info->imageData[i + 2] = aux;
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2019-11-23 20:27:39 +08:00
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}
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}
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ret = true;
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} while (0);
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return ret;
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}
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2021-12-25 10:04:45 +08:00
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static bool tgaLoadRLEImageData(unsigned char* buffer, uint32_t bufSize, tImageTGA* info)
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2019-11-23 20:27:39 +08:00
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{
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unsigned int mode, total, i, index = 0;
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2019-11-23 20:27:39 +08:00
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unsigned char aux[4], runlength = 0;
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unsigned int skip = 0, flag = 0;
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size_t step = (sizeof(unsigned char) + sizeof(signed short)) * 6;
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// mode equal the number of components for each pixel
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mode = info->pixelDepth / 8;
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// total is the number of unsigned chars we'll have to read
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total = info->height * info->width;
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2021-12-25 10:04:45 +08:00
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for (i = 0; i < total; i++)
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2019-11-23 20:27:39 +08:00
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{
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// if we have a run length pending, run it
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2021-12-25 10:04:45 +08:00
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if (runlength != 0)
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2019-11-23 20:27:39 +08:00
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{
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// we do, update the run length count
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runlength--;
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skip = (flag != 0);
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}
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else
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{
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// otherwise, read in the run length token
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CC_BREAK_IF((step + sizeof(unsigned char)) > bufSize);
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memcpy(&runlength, buffer + step, sizeof(unsigned char));
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step += sizeof(unsigned char);
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// see if it's a RLE encoded sequence
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flag = runlength & 0x80;
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2021-12-25 10:04:45 +08:00
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if (flag)
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2019-11-23 20:27:39 +08:00
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{
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runlength -= 128;
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}
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skip = 0;
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}
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// do we need to skip reading this pixel?
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2021-12-25 10:04:45 +08:00
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if (!skip)
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2019-11-23 20:27:39 +08:00
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{
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// no, read in the pixel data
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CC_BREAK_IF((step + sizeof(unsigned char) * mode) > bufSize);
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memcpy(aux, buffer + step, sizeof(unsigned char) * mode);
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step += sizeof(unsigned char) * mode;
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// mode=3 or 4 implies that the image is RGB(A). However TGA
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// stores it as BGR(A) so we'll have to swap R and B.
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2021-12-25 10:04:45 +08:00
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if (mode >= 3)
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2019-11-23 20:27:39 +08:00
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{
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unsigned char tmp;
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2021-12-25 10:04:45 +08:00
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tmp = aux[0];
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2019-11-23 20:27:39 +08:00
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aux[0] = aux[2];
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aux[2] = tmp;
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}
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}
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// add the pixel to our image
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memcpy(&info->imageData[index], aux, mode);
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index += mode;
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}
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2021-12-25 10:04:45 +08:00
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2019-11-23 20:27:39 +08:00
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return true;
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}
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2021-12-25 10:04:45 +08:00
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void tgaFlipImage(tImageTGA* info)
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2019-11-23 20:27:39 +08:00
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{
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// mode equal the number of components for each pixel
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2021-12-25 10:04:45 +08:00
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int mode = info->pixelDepth / 8;
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int rowbytes = info->width * mode;
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unsigned char* row = (unsigned char*)malloc(rowbytes);
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2019-11-23 20:27:39 +08:00
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int y;
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2021-12-25 10:04:45 +08:00
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if (row == nullptr)
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return;
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for (y = 0; y < (info->height / 2); y++)
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2019-11-23 20:27:39 +08:00
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{
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2021-12-25 10:04:45 +08:00
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memcpy(row, &info->imageData[y * rowbytes], rowbytes);
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memcpy(&info->imageData[y * rowbytes], &info->imageData[(info->height - (y + 1)) * rowbytes], rowbytes);
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memcpy(&info->imageData[(info->height - (y + 1)) * rowbytes], row, rowbytes);
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2019-11-23 20:27:39 +08:00
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}
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2021-12-25 10:04:45 +08:00
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2019-11-23 20:27:39 +08:00
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free(row);
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info->flipped = 0;
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}
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2021-12-25 10:04:45 +08:00
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2021-09-05 20:45:32 +08:00
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tImageTGA* tgaLoadBuffer(unsigned char* buffer, int32_t size)
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2019-11-23 20:27:39 +08:00
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{
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2021-12-25 10:04:45 +08:00
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int mode, total;
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tImageTGA* info = nullptr;
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2019-11-23 20:27:39 +08:00
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do
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{
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2021-12-25 10:04:45 +08:00
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CC_BREAK_IF(!buffer);
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info = (tImageTGA*)malloc(sizeof(tImageTGA));
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2019-11-23 20:27:39 +08:00
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// get the file header info
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2021-12-25 10:04:45 +08:00
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if (!tgaLoadHeader(buffer, size, info))
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2019-11-23 20:27:39 +08:00
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{
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info->status = TGA_ERROR_MEMORY;
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break;
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}
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// check if the image is color indexed
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if (info->type == 1)
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{
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info->status = TGA_ERROR_INDEXED_COLOR;
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break;
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}
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// check for other types (compressed images)
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2021-12-25 10:04:45 +08:00
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if ((info->type != 2) && (info->type != 3) && (info->type != 10))
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2019-11-23 20:27:39 +08:00
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{
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info->status = TGA_ERROR_COMPRESSED_FILE;
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break;
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}
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// mode equals the number of image components
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mode = info->pixelDepth / 8;
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// total is the number of unsigned chars to read
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total = info->height * info->width * mode;
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// allocate memory for image pixels
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2021-12-25 10:04:45 +08:00
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info->imageData = (unsigned char*)malloc(sizeof(unsigned char) * total);
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2019-11-23 20:27:39 +08:00
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// check to make sure we have the memory required
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if (info->imageData == nullptr)
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{
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info->status = TGA_ERROR_MEMORY;
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break;
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}
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bool bLoadImage = false;
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// finally load the image pixels
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2021-12-25 10:04:45 +08:00
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if (info->type == 10)
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2019-11-23 20:27:39 +08:00
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{
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bLoadImage = tgaLoadRLEImageData(buffer, size, info);
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}
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else
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{
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bLoadImage = tgaLoadImageData(buffer, size, info);
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}
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// check for errors when reading the pixels
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2021-12-25 10:04:45 +08:00
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if (!bLoadImage)
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2019-11-23 20:27:39 +08:00
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{
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info->status = TGA_ERROR_READING_FILE;
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break;
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}
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info->status = TGA_OK;
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2021-12-25 10:04:45 +08:00
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if (info->flipped)
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2019-11-23 20:27:39 +08:00
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{
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2021-12-25 10:04:45 +08:00
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tgaFlipImage(info);
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if (info->flipped)
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2019-11-23 20:27:39 +08:00
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{
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info->status = TGA_ERROR_MEMORY;
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}
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}
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2021-12-25 10:04:45 +08:00
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} while (0);
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2019-11-23 20:27:39 +08:00
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return info;
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}
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// this is the function to call when we want to load an image
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2021-12-25 10:04:45 +08:00
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tImageTGA* tgaLoad(const char* filename)
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2019-11-23 20:27:39 +08:00
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{
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Data data = FileUtils::getInstance()->getDataFromFile(filename);
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if (!data.isNull())
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{
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return tgaLoadBuffer(data.getBytes(), data.getSize());
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}
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2021-12-25 10:04:45 +08:00
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2019-11-23 20:27:39 +08:00
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return nullptr;
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}
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// converts RGB to grayscale
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2021-12-25 10:04:45 +08:00
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void tgaRGBtogreyscale(tImageTGA* info)
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{
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int mode, i, j;
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unsigned char* newImageData;
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2019-11-23 20:27:39 +08:00
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// if the image is already grayscale do nothing
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if (info->pixelDepth == 8)
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return;
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2021-12-25 10:04:45 +08:00
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2019-11-23 20:27:39 +08:00
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// compute the number of actual components
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mode = info->pixelDepth / 8;
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2021-12-25 10:04:45 +08:00
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2019-11-23 20:27:39 +08:00
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// allocate an array for the new image data
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2021-12-25 10:04:45 +08:00
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newImageData = (unsigned char*)malloc(sizeof(unsigned char) * info->height * info->width);
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if (newImageData == nullptr)
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{
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2019-11-23 20:27:39 +08:00
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return;
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}
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2021-12-25 10:04:45 +08:00
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2019-11-23 20:27:39 +08:00
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// convert pixels: grayscale = o.30 * R + 0.59 * G + 0.11 * B
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2021-12-25 10:04:45 +08:00
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for (i = 0, j = 0; j < info->width * info->height; i += mode, j++)
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newImageData[j] =
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(unsigned char)(0.30 * info->imageData[i] + 0.59 * info->imageData[i + 1] + 0.11 * info->imageData[i + 2]);
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// free old image data
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2019-11-23 20:27:39 +08:00
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free(info->imageData);
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2021-12-25 10:04:45 +08:00
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2019-11-23 20:27:39 +08:00
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// reassign pixelDepth and type according to the new image type
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info->pixelDepth = 8;
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2021-12-25 10:04:45 +08:00
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info->type = 3;
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2019-11-23 20:27:39 +08:00
|
|
|
// reassigning imageData to the new array.
|
|
|
|
info->imageData = newImageData;
|
|
|
|
}
|
|
|
|
|
|
|
|
// releases the memory used for the image
|
2021-12-25 10:04:45 +08:00
|
|
|
void tgaDestroy(tImageTGA* info)
|
|
|
|
{
|
|
|
|
|
|
|
|
if (info != nullptr)
|
|
|
|
{
|
2019-11-23 20:27:39 +08:00
|
|
|
if (info->imageData != nullptr)
|
|
|
|
{
|
|
|
|
free(info->imageData);
|
|
|
|
}
|
|
|
|
|
|
|
|
free(info);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
NS_CC_END
|