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Commit 1c5631a5 authored by Anakin's avatar Anakin
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improve image load performance, 

can be improved more, but scanline has wrong results
parent bc5bfc62
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QtMeshViewer/Header/tga.h
+ 108
− 100
View file @ 1c5631a5
......@@ -2,137 +2,145 @@
#include <fstream>
#include <QImage>
#include <QColor>
#include <QVector>
#include <QFile>
#include "Profiler.h"
QImage loadTga(QString filePath, bool &success)
{
TIC("start");
QImage img;
success = true;
// open the file
std::fstream fsPicture(filePath.toStdString().c_str(), std::ios::in | std::ios::binary);
QFile file(filePath);
if (!fsPicture.is_open())
if (!file.open(QIODevice::ReadOnly))
{
img = QImage(1, 1, QImage::Format_RGB32);
img.fill(Qt::red);
success = false;
return img;
}
// read in the header
std::uint8_t ui8x18Header[19] = { 0 };
fsPicture.read(reinterpret_cast<char*>(&ui8x18Header), sizeof(ui8x18Header) - 1);
//get variables
std::uint32_t ui32BpP;
std::uint32_t ui32Width;
std::uint32_t ui32Height;
std::uint32_t ui32IDLength;
std::uint32_t ui32PicType;
std::uint32_t ui32PaletteLength;
std::uint32_t ui32Size;
// extract all information from header
ui32IDLength = ui8x18Header[0];
ui32PicType = ui8x18Header[2];
ui32PaletteLength = ui8x18Header[6] * 0x100 + ui8x18Header[5];
ui32Width = ui8x18Header[13] * 0x100 + ui8x18Header[12];
ui32Height = ui8x18Header[15] * 0x100 + ui8x18Header[14];
ui32BpP = ui8x18Header[16];
// calculate some more information
ui32Size = ui32Width * ui32Height * ui32BpP / 8;
// jump to the data block
fsPicture.seekg(ui32IDLength + ui32PaletteLength, std::ios_base::cur);
img = QImage(ui32Width, ui32Height, QImage::Format_RGBA8888);
// uncompressed
if (ui32PicType == 2 && (ui32BpP == 24 || ui32BpP == 32))
else
{
std::vector<std::uint8_t> vui8Pixels;
vui8Pixels.resize(ui32Size);
fsPicture.read(reinterpret_cast<char*>(vui8Pixels.data()), ui32Size);
for (unsigned int y = 0; y < ui32Height; y++)
// read in the header
quint8 ui8x18Header[19] = { 0 };
file.read(reinterpret_cast<char*>(&ui8x18Header), sizeof(ui8x18Header) - 1);
//get variables
quint32 ui32BpP;
quint32 ui32Width;
quint32 ui32Height;
quint32 ui32IDLength;
quint32 ui32PicType;
quint32 ui32PaletteLength;
quint32 ui32Size;
// extract all information from header
ui32IDLength = ui8x18Header[0];
ui32PicType = ui8x18Header[2];
ui32PaletteLength = ui8x18Header[6] * 0x100 + ui8x18Header[5];
ui32Width = ui8x18Header[13] * 0x100 + ui8x18Header[12];
ui32Height = ui8x18Header[15] * 0x100 + ui8x18Header[14];
ui32BpP = ui8x18Header[16];
// calculate some more information
ui32Size = ui32Width * ui32Height * ui32BpP / 8;
// jump to the data block
file.seek(ui32IDLength + ui32PaletteLength + 18);
img = QImage(ui32Width, ui32Height, QImage::Format_RGBA8888);
// uncompressed
if (ui32PicType == 2 && (ui32BpP == 24 || ui32BpP == 32))
{
for (unsigned int x = 0; x < ui32Width; x++)
QVector<quint8> vui8Pixels;
vui8Pixels.resize(ui32Size);
file.read(reinterpret_cast<char*>(vui8Pixels.data()), ui32Size);
for (unsigned int y = 0; y < ui32Height; y++)
{
int valr = vui8Pixels.at(y * ui32Width * ui32BpP / 8 + x * ui32BpP / 8 + 2);
int valg = vui8Pixels.at(y * ui32Width * ui32BpP / 8 + x * ui32BpP / 8 + 1);
int valb = vui8Pixels.at(y * ui32Width * ui32BpP / 8 + x * ui32BpP / 8);
int vala = 255;
if (ui32BpP == 32)
vala = vui8Pixels.at(y * ui32Width * ui32BpP / 8 + x * ui32BpP / 8 + 3);
QColor value(valr, valg, valb, vala);
img.setPixel(x, ui32Width - 1 - y, value.rgba());
//QRgb* imgLine = (QRgb*)img.scanLine(y);
for (unsigned int x = 0; x < ui32Width; x++)
{
int valr = vui8Pixels.at(y * ui32Width * ui32BpP / 8 + x * ui32BpP / 8 + 2);
int valg = vui8Pixels.at(y * ui32Width * ui32BpP / 8 + x * ui32BpP / 8 + 1);
int valb = vui8Pixels.at(y * ui32Width * ui32BpP / 8 + x * ui32BpP / 8);
int vala = 255;
if (ui32BpP == 32)
vala = vui8Pixels.at(y * ui32Width * ui32BpP / 8 + x * ui32BpP / 8 + 3);
QColor value(valr, valg, valb, vala);
//imgLine[x] = value.rgba();
img.setPixel(x, ui32Width - 1 - y, value.rgba());
}
}
}
}
// else if compressed 24 or 32 bit
else if (ui32PicType == 10 && (ui32BpP == 24 || ui32BpP == 32)) // compressed
{
std::uint8_t tempChunkHeader;
std::uint8_t tempData[5];
unsigned int tmp_pixelIndex = 0;
// else if compressed 24 or 32 bit
else if (ui32PicType == 10 && (ui32BpP == 24 || ui32BpP == 32)) // compressed
{
quint8 tempChunkHeader;
quint8 tempData[5];
unsigned int tmp_pixelIndex = 0;
do {
fsPicture.read(reinterpret_cast<char*>(&tempChunkHeader), sizeof(tempChunkHeader));
do {
file.read(reinterpret_cast<char*>(&tempChunkHeader), sizeof(tempChunkHeader));
if (tempChunkHeader >> 7) // repeat count
{
// just use the first 7 bits
tempChunkHeader = (uint8_t(tempChunkHeader << 1) >> 1);
if (tempChunkHeader >> 7) // repeat count
{
// just use the first 7 bits
tempChunkHeader = (quint8(tempChunkHeader << 1) >> 1);
fsPicture.read(reinterpret_cast<char*>(&tempData), ui32BpP / 8);
file.read(reinterpret_cast<char*>(&tempData), ui32BpP / 8);
for (int i = 0; i <= tempChunkHeader; i++)
{
QColor color;
for (int i = 0; i <= tempChunkHeader; i++)
{
QColor color;
if (ui32BpP == 32)
color.setRgba(qRgba(tempData[2], tempData[1], tempData[0], tempData[3]));
else
color.setRgba(qRgba(tempData[2], tempData[1], tempData[0], 255));
if (ui32BpP == 32)
color.setRgba(qRgba(tempData[2], tempData[1], tempData[0], tempData[3]));
else
color.setRgba(qRgba(tempData[2], tempData[1], tempData[0], 255));
img.setPixel(tmp_pixelIndex % ui32Width, ui32Height - 1 - (tmp_pixelIndex / ui32Width), color.rgba());
tmp_pixelIndex++;
img.setPixel(tmp_pixelIndex % ui32Width, ui32Height - 1 - (tmp_pixelIndex / ui32Width), color.rgba());
tmp_pixelIndex++;
}
}
}
else // data count
{
// just use the first 7 bits
tempChunkHeader = (uint8_t(tempChunkHeader << 1) >> 1);
for (int i = 0; i <= tempChunkHeader; i++)
else // data count
{
fsPicture.read(reinterpret_cast<char*>(&tempData), ui32BpP / 8);
// just use the first 7 bits
tempChunkHeader = (uint8_t(tempChunkHeader << 1) >> 1);
QColor color;
for (int i = 0; i <= tempChunkHeader; i++)
{
file.read(reinterpret_cast<char*>(&tempData), ui32BpP / 8);
if (ui32BpP == 32)
color.setRgba(qRgba(tempData[2], tempData[1], tempData[0], tempData[3]));
else
color.setRgba(qRgba(tempData[2], tempData[1], tempData[0], 255));
QColor color;
img.setPixel(tmp_pixelIndex % ui32Width, ui32Height - 1 - (tmp_pixelIndex / ui32Width), color.rgba());
tmp_pixelIndex++;
if (ui32BpP == 32)
color.setRgba(qRgba(tempData[2], tempData[1], tempData[0], tempData[3]));
else
color.setRgba(qRgba(tempData[2], tempData[1], tempData[0], 255));
img.setPixel(tmp_pixelIndex % ui32Width, ui32Height - 1 - (tmp_pixelIndex / ui32Width), color.rgba());
tmp_pixelIndex++;
}
}
}
} while (tmp_pixelIndex < (ui32Width * ui32Height));
}
// not useable format
else
{
fsPicture.close();
success = false;
return img;
} while (tmp_pixelIndex < (ui32Width * ui32Height));
}
// not useable format
else
{
success = false;
}
}
fsPicture.close();
success = true;
TOC("end");
if (file.isOpen())
file.close();
return img;
}
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