improve image load performance,
can be improved more, but scanline has wrong results
This commit is contained in:
Anakin
parent
bc5bfc62bc
commit
1c5631a5e0
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@ -2,137 +2,145 @@
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#include <fstream>
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#include <QImage>
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#include <QColor>
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#include <QVector>
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#include <QFile>
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#include "Profiler.h"
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QImage loadTga(QString filePath, bool &success)
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{
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TIC("start");
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QImage img;
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success = true;
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// open the file
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std::fstream fsPicture(filePath.toStdString().c_str(), std::ios::in | std::ios::binary);
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QFile file(filePath);
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if (!fsPicture.is_open())
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if (!file.open(QIODevice::ReadOnly))
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{
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img = QImage(1, 1, QImage::Format_RGB32);
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img.fill(Qt::red);
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success = false;
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return img;
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}
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// read in the header
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std::uint8_t ui8x18Header[19] = { 0 };
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fsPicture.read(reinterpret_cast<char*>(&ui8x18Header), sizeof(ui8x18Header) - 1);
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//get variables
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std::uint32_t ui32BpP;
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std::uint32_t ui32Width;
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std::uint32_t ui32Height;
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std::uint32_t ui32IDLength;
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std::uint32_t ui32PicType;
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std::uint32_t ui32PaletteLength;
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std::uint32_t ui32Size;
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// extract all information from header
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ui32IDLength = ui8x18Header[0];
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ui32PicType = ui8x18Header[2];
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ui32PaletteLength = ui8x18Header[6] * 0x100 + ui8x18Header[5];
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ui32Width = ui8x18Header[13] * 0x100 + ui8x18Header[12];
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ui32Height = ui8x18Header[15] * 0x100 + ui8x18Header[14];
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ui32BpP = ui8x18Header[16];
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// calculate some more information
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ui32Size = ui32Width * ui32Height * ui32BpP / 8;
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// jump to the data block
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fsPicture.seekg(ui32IDLength + ui32PaletteLength, std::ios_base::cur);
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img = QImage(ui32Width, ui32Height, QImage::Format_RGBA8888);
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// uncompressed
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if (ui32PicType == 2 && (ui32BpP == 24 || ui32BpP == 32))
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{
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std::vector<std::uint8_t> vui8Pixels;
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vui8Pixels.resize(ui32Size);
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fsPicture.read(reinterpret_cast<char*>(vui8Pixels.data()), ui32Size);
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for (unsigned int y = 0; y < ui32Height; y++)
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{
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for (unsigned int x = 0; x < ui32Width; x++)
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{
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int valr = vui8Pixels.at(y * ui32Width * ui32BpP / 8 + x * ui32BpP / 8 + 2);
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int valg = vui8Pixels.at(y * ui32Width * ui32BpP / 8 + x * ui32BpP / 8 + 1);
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int valb = vui8Pixels.at(y * ui32Width * ui32BpP / 8 + x * ui32BpP / 8);
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int vala = 255;
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if (ui32BpP == 32)
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vala = vui8Pixels.at(y * ui32Width * ui32BpP / 8 + x * ui32BpP / 8 + 3);
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QColor value(valr, valg, valb, vala);
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img.setPixel(x, ui32Width - 1 - y, value.rgba());
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}
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}
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}
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// else if compressed 24 or 32 bit
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else if (ui32PicType == 10 && (ui32BpP == 24 || ui32BpP == 32)) // compressed
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{
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std::uint8_t tempChunkHeader;
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std::uint8_t tempData[5];
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unsigned int tmp_pixelIndex = 0;
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do {
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fsPicture.read(reinterpret_cast<char*>(&tempChunkHeader), sizeof(tempChunkHeader));
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if (tempChunkHeader >> 7) // repeat count
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{
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// just use the first 7 bits
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tempChunkHeader = (uint8_t(tempChunkHeader << 1) >> 1);
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fsPicture.read(reinterpret_cast<char*>(&tempData), ui32BpP / 8);
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for (int i = 0; i <= tempChunkHeader; i++)
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{
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QColor color;
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if (ui32BpP == 32)
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color.setRgba(qRgba(tempData[2], tempData[1], tempData[0], tempData[3]));
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else
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color.setRgba(qRgba(tempData[2], tempData[1], tempData[0], 255));
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img.setPixel(tmp_pixelIndex % ui32Width, ui32Height - 1 - (tmp_pixelIndex / ui32Width), color.rgba());
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tmp_pixelIndex++;
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}
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}
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else // data count
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{
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// just use the first 7 bits
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tempChunkHeader = (uint8_t(tempChunkHeader << 1) >> 1);
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for (int i = 0; i <= tempChunkHeader; i++)
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{
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fsPicture.read(reinterpret_cast<char*>(&tempData), ui32BpP / 8);
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QColor color;
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if (ui32BpP == 32)
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color.setRgba(qRgba(tempData[2], tempData[1], tempData[0], tempData[3]));
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else
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color.setRgba(qRgba(tempData[2], tempData[1], tempData[0], 255));
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img.setPixel(tmp_pixelIndex % ui32Width, ui32Height - 1 - (tmp_pixelIndex / ui32Width), color.rgba());
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tmp_pixelIndex++;
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}
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}
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} while (tmp_pixelIndex < (ui32Width * ui32Height));
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}
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// not useable format
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else
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{
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fsPicture.close();
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success = false;
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return img;
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// read in the header
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quint8 ui8x18Header[19] = { 0 };
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file.read(reinterpret_cast<char*>(&ui8x18Header), sizeof(ui8x18Header) - 1);
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//get variables
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quint32 ui32BpP;
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quint32 ui32Width;
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quint32 ui32Height;
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quint32 ui32IDLength;
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quint32 ui32PicType;
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quint32 ui32PaletteLength;
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quint32 ui32Size;
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// extract all information from header
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ui32IDLength = ui8x18Header[0];
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ui32PicType = ui8x18Header[2];
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ui32PaletteLength = ui8x18Header[6] * 0x100 + ui8x18Header[5];
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ui32Width = ui8x18Header[13] * 0x100 + ui8x18Header[12];
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ui32Height = ui8x18Header[15] * 0x100 + ui8x18Header[14];
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ui32BpP = ui8x18Header[16];
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// calculate some more information
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ui32Size = ui32Width * ui32Height * ui32BpP / 8;
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// jump to the data block
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file.seek(ui32IDLength + ui32PaletteLength + 18);
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img = QImage(ui32Width, ui32Height, QImage::Format_RGBA8888);
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// uncompressed
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if (ui32PicType == 2 && (ui32BpP == 24 || ui32BpP == 32))
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{
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QVector<quint8> vui8Pixels;
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vui8Pixels.resize(ui32Size);
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file.read(reinterpret_cast<char*>(vui8Pixels.data()), ui32Size);
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for (unsigned int y = 0; y < ui32Height; y++)
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{
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//QRgb* imgLine = (QRgb*)img.scanLine(y);
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for (unsigned int x = 0; x < ui32Width; x++)
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{
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int valr = vui8Pixels.at(y * ui32Width * ui32BpP / 8 + x * ui32BpP / 8 + 2);
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int valg = vui8Pixels.at(y * ui32Width * ui32BpP / 8 + x * ui32BpP / 8 + 1);
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int valb = vui8Pixels.at(y * ui32Width * ui32BpP / 8 + x * ui32BpP / 8);
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int vala = 255;
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if (ui32BpP == 32)
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vala = vui8Pixels.at(y * ui32Width * ui32BpP / 8 + x * ui32BpP / 8 + 3);
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QColor value(valr, valg, valb, vala);
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//imgLine[x] = value.rgba();
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img.setPixel(x, ui32Width - 1 - y, value.rgba());
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}
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}
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}
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// else if compressed 24 or 32 bit
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else if (ui32PicType == 10 && (ui32BpP == 24 || ui32BpP == 32)) // compressed
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{
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quint8 tempChunkHeader;
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quint8 tempData[5];
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unsigned int tmp_pixelIndex = 0;
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do {
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file.read(reinterpret_cast<char*>(&tempChunkHeader), sizeof(tempChunkHeader));
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if (tempChunkHeader >> 7) // repeat count
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{
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// just use the first 7 bits
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tempChunkHeader = (quint8(tempChunkHeader << 1) >> 1);
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file.read(reinterpret_cast<char*>(&tempData), ui32BpP / 8);
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for (int i = 0; i <= tempChunkHeader; i++)
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{
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QColor color;
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if (ui32BpP == 32)
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color.setRgba(qRgba(tempData[2], tempData[1], tempData[0], tempData[3]));
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else
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color.setRgba(qRgba(tempData[2], tempData[1], tempData[0], 255));
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img.setPixel(tmp_pixelIndex % ui32Width, ui32Height - 1 - (tmp_pixelIndex / ui32Width), color.rgba());
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tmp_pixelIndex++;
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}
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}
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else // data count
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{
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// just use the first 7 bits
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tempChunkHeader = (uint8_t(tempChunkHeader << 1) >> 1);
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for (int i = 0; i <= tempChunkHeader; i++)
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{
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file.read(reinterpret_cast<char*>(&tempData), ui32BpP / 8);
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QColor color;
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if (ui32BpP == 32)
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color.setRgba(qRgba(tempData[2], tempData[1], tempData[0], tempData[3]));
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else
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color.setRgba(qRgba(tempData[2], tempData[1], tempData[0], 255));
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img.setPixel(tmp_pixelIndex % ui32Width, ui32Height - 1 - (tmp_pixelIndex / ui32Width), color.rgba());
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tmp_pixelIndex++;
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}
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}
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} while (tmp_pixelIndex < (ui32Width * ui32Height));
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}
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// not useable format
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else
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{
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success = false;
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}
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}
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fsPicture.close();
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success = true;
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TOC("end");
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if (file.isOpen())
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file.close();
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return img;
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}
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