void ApiSurface::contentsFromBase64(const QByteArray &base64)
{
- QByteArray dataArray = QByteArray::fromBase64(base64);
-
- /*
- * FIXME: Detect the float PFM images here.
- */
- ByteArrayBuf buf(dataArray);
- std::istream istr(&buf);
- image::Image *image = image::readPNG(istr);
+ m_base64Data = base64;
/*
- * FIXME: Instead of converting to QImage here, we should be deferring the conversion
- * to imageviewer.cpp.
- *
- * XXX: We still need the thumbnail though.
+ * We need to do the conversion to create the thumbnail
*/
-
+ image::Image *image = imageFromBase64(base64);
Q_ASSERT(image);
-
- int width = image->width;
- int height = image->height;
-
- m_image = QImage(width, height, QImage::Format_ARGB32);
-
- const unsigned char *srcRow = image->start();
- for (int y = 0; y < height; ++y) {
- QRgb *dst = (QRgb *)m_image.scanLine(y);
-
- if (image->channelType == image::TYPE_UNORM8) {
- const unsigned char *src = srcRow;
- for (int x = 0; x < width; ++x) {
- unsigned char rgba[4];
- 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 >= 255.0f) {
- 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();
- }
-
+ QImage img = qimageFromRawImage(image);
+ m_thumb = thumbnail(img);
delete image;
-
- m_thumb = thumbnail(m_image);
}
-QImage ApiSurface::image() const
+QByteArray ApiSurface::base64Data() const
{
- return m_image;
+ return m_base64Data;
}
QImage ApiSurface::thumb() const
m_type = str;
}
+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;
+}
+
+
+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;
+}