turanszkij
67 lines
1.4 KiB
C++
67 lines
1.4 KiB
C++
#include "wiTGATextureLoader.h"
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#include "wiHelper.h"
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#include <fstream>
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using namespace std;
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wiTGATextureLoader::wiTGATextureLoader() : texels(nullptr)
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{
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}
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wiTGATextureLoader::~wiTGATextureLoader()
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{
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SAFE_DELETE_ARRAY(texels);
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}
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void wiTGATextureLoader::load(const string& fileName)
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{
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wiHelper::DataBlob file(fileName);
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if (file.DATA == nullptr)
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{
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return;
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}
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/*Fill our header.*/
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file.read(header.idlength);
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file.read(header.colourmaptype);
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file.read(header.datatypecode);
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file.read(header.colourmaporigin);
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file.read(header.colourmaplength);
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file.read(header.colourmapdepth);
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file.read(header.x_origin);
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file.read(header.y_origin);
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file.read(header.width);
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file.read(header.height);
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file.read(header.bitsperpixel);
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file.read(header.imagedescriptor);
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/*Allocate memory*/
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texels = new uint8_t[header.width * header.height * 4];
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/*Start reading and converting our image!*/
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for (int y = 0; y < header.height; ++y)
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{
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for (int x = 0; x < header.width; ++x)
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{
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// Origin conversion:
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int _X = x;
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int _Y = header.height - 1 - y;
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int gridpos = (_X + _Y * header.width) * 4;
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/*BGRA --> RGBA*/
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file.read(texels[gridpos + 2]);
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file.read(texels[gridpos + 1]);
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file.read(texels[gridpos + 0]);
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if (header.bitsperpixel == 32)
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{
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file.read(texels[gridpos + 3]);
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}
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else if (header.bitsperpixel == 24)
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{
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texels[gridpos + 3] = 255;
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}
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}
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}
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}
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