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#include "apisurface.h"
#include "thumbnail.h"
#include <sstream>
#include <memory>
#include <QDebug>
#include <QSysInfo>
#include "image/image.hpp"
ApiSurface::ApiSurface()
{
}
QSize ApiSurface::size() const
{
return m_size;
}
void ApiSurface::setSize(const QSize &size)
{
m_size = size;
}
struct ByteArrayBuf : public std::streambuf
{
ByteArrayBuf(const QByteArray & a)
{
setg((char *)a.data(), (char *)a.data(), (char *)a.data() + a.size());
}
};
QImage ApiSurface::calculateThumbnail(bool opaque, bool alpha) const
{
return m_data.isEmpty() ? QImage{} : calculateThumbnail(m_data, opaque, alpha);
}
QImage ApiSurface::calculateThumbnail(const QByteArray &data, bool opaque,
bool alpha) const
{
/*
* We need to do the conversion to create the thumbnail
*/
std::unique_ptr<image::Image> image{imageFromData(data)};
Q_ASSERT(image);
QImage img = qimageFromRawImage(image.get(), 0.0f, 1.0f, opaque, alpha);
return thumbnail(img);
}
void ApiSurface::setData(const QByteArray &data)
{
m_data = data;
}
QByteArray ApiSurface::data() const
{
return m_data;
}
int ApiSurface::depth() const
{
return m_depth;
}
void ApiSurface::setDepth(int depth)
{
m_depth = depth;
}
QString ApiSurface::formatName() const
{
return m_formatName;
}
void ApiSurface::setFormatName(const QString &str)
{
m_formatName = str;
}
ApiTexture::ApiTexture()
: ApiSurface()
{
}
QString ApiTexture::label() const
{
return m_label;
}
void ApiTexture::setLabel(const QString &str)
{
m_label = str;
}
ApiFramebuffer::ApiFramebuffer()
: ApiSurface()
{
}
QString ApiFramebuffer::type() const
{
return m_type;
}
void ApiFramebuffer::setType(const QString &str)
{
m_type = str;
}
image::Image *
ApiSurface::imageFromData(const QByteArray &dataArray)
{
image::Image *image;
/*
* Detect the PNG vs PFM images.
*/
const char pngSignature[] = {(char)0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A, 0};
if (dataArray.startsWith(pngSignature)) {
ByteArrayBuf buf(dataArray);
std::istream istr(&buf);
image = image::readPNG(istr);
} else {
image = image::readPNM(dataArray.data(), dataArray.size());
}
return image;
}
static inline unsigned char clamp(int x)
{
if (x <= 0) {
return 0;
}
if (x > 255) {
return 255;
}
return (unsigned char) x;
}
static inline unsigned char clamp(float x)
{
if (x <= 0.0f) {
return 0;
}
if (x > 255.0f) {
return 255;
}
return (unsigned char) (x + 0.5f);
}
QImage
ApiSurface::qimageFromRawImage(const image::Image *image,
float lowerValue,
float upperValue,
bool opaque,
bool alpha)
{
QImage img;
int width = image->width;
int height = image->height;
img = QImage(width, height, QImage::Format_ARGB32);
int offset = - lowerValue * 255;
int scale = 256 / (upperValue - lowerValue);
float offset_f = - lowerValue;
float scale_f = 255.0f / (upperValue - lowerValue);
int aMask = (opaque || alpha) ? 0xff : 0;
const unsigned char *srcRow = image->start();
for (int y = 0; y < height; ++y) {
QRgb *dst = (QRgb *)img.scanLine(y);
if (image->channelType == image::TYPE_UNORM8) {
const unsigned char *src = srcRow;
for (int x = 0; x < width; ++x) {
unsigned char rgba[4] = {0, 0, 0, 0xff};
for (int c = 0; c < image->channels; ++c) {
rgba[c] = clamp(((*src++ + offset) * scale) >> 8);
}
if (image->channels == 1) {
// Use gray-scale instead of red
rgba[1] = rgba[0];
rgba[2] = rgba[0];
}
if (alpha) {
rgba[2] = rgba[1] = rgba[0] = rgba[3];
}
rgba[3] |= aMask;
dst[x] = qRgba(rgba[0], rgba[1], rgba[2], rgba[3]);
}
} else {
const float *src = (const float *)srcRow;
for (int x = 0; x < width; ++x) {
unsigned char rgba[4] = {0, 0, 0, 0xff};
for (int c = 0; c < image->channels; ++c) {
rgba[c] = clamp((*src++ + offset_f)*scale_f);
}
if (image->channels == 1) {
// Use gray-scale instead of red
rgba[1] = rgba[0];
rgba[2] = rgba[0];
}
if (alpha) {
rgba[2] = rgba[1] = rgba[0] = rgba[3];
}
rgba[3] |= aMask;
dst[x] = qRgba(rgba[0], rgba[1], rgba[2], rgba[3]);
}
}
srcRow += image->stride();
}
return img;
}
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