+image::Image *
+ApiSurface::imageFromBase64(const QByteArray &base64)
+{
+ QByteArray dataArray = QByteArray::fromBase64(base64);
+ 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;
+}
+
+
+QImage
+ApiSurface::qimageFromRawImage(const image::Image *image)
+{
+ QImage img;
+ int width = image->width;
+ int height = image->height;
+
+ img = QImage(width, height, QImage::Format_ARGB32);
+
+ 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] = *src++;
+ }
+ if (image->channels == 1) {
+ // Use gray-scale instead of red
+ rgba[1] = rgba[0];
+ rgba[2] = rgba[0];
+ }
+ 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) {
+ float f = *src++;
+ unsigned char u;
+ if (f >= 1.0f) {
+ u = 255;
+ } else if (f <= 0.0f) {
+ u = 0;
+ } else {
+ u = f * 255 + 0.5;
+ }
+ rgba[c] = u;
+ }
+ if (image->channels == 1) {
+ // Use gray-scale instead of red
+ rgba[1] = rgba[0];
+ rgba[2] = rgba[0];
+ }
+ dst[x] = qRgba(rgba[0], rgba[1], rgba[2], rgba[3]);
+ }
+ }
+
+ srcRow += image->stride();
+ }
+
+ return img;
+}