diff --git a/imagewidget.cpp b/imagewidget.cpp
index 597f570..38ac3cd 100644
--- a/imagewidget.cpp
+++ b/imagewidget.cpp
@@ -190,10 +190,10 @@ void ImageWidgetGL::zoom(int zoom, const QPointF &mousePos)
     if(!mousePos.isNull())
         focus = mousePos;
 
-    if(width() > m_image->width() * m_scale)
-        m_dx = -width() * 0.5f + m_image->width() * m_scale * 0.5f;
-    if(height() > m_image->height() * m_scale)
-        m_dy = -height() * 0.5f + m_image->height() * m_scale * 0.5f;
+    if(width() > m_imgWidth * m_scale)
+        m_dx = -width() * 0.5f + m_imgWidth * m_scale * 0.5f;
+    if(height() > m_imgHeight * m_scale)
+        m_dy = -height() * 0.5f + m_imgHeight * m_scale * 0.5f;
 
     float newScale = std::sqrt(std::pow(2.0f, (float)m_scaleStop));
     float r = newScale / m_scale;
@@ -237,10 +237,10 @@ QVector2D ImageWidgetGL::getImagePixelCoord(const QVector2D &pos)
 {
     float dx = m_dx;
     float dy = m_dy;
-    if(m_width > m_image->width()*m_scale)
-        dx = -width()*0.5f + m_image->width()*m_scale*0.5f;
-    if(m_height > m_image->height()*m_scale)
-        dy = -height()*0.5f + m_image->height()*m_scale*0.5f;
+    if(m_width > m_imgWidth * m_scale)
+        dx = -width()*0.5f + m_imgWidth*m_scale * 0.5f;
+    if(m_height > m_imgHeight * m_scale)
+        dy = -height()*0.5f + m_imgHeight*m_scale * 0.5f;
 
     QVector2D offset(dx, dy);
     return (pos + offset) / m_scale;
@@ -353,8 +353,8 @@ void swPaint(std::shared_ptr<RawImage> &rawImage, float dx, float dy, float scal
     int height = widget->height();
     QImage img(width, height, QImage::Format_RGB32);
     img.fill(Qt::gray);
-    int ox = dx;
-    int oy = dy;
+    int64_t ox = dx;
+    int64_t oy = dy;
 
     auto mtf = [&mtfParams](int i, float x)
     {
@@ -376,18 +376,18 @@ void swPaint(std::shared_ptr<RawImage> &rawImage, float dx, float dy, float scal
         float r[4];
         float g[4];
         float b[4];
-        for(int y = std::max(0, -oy); y < height; y++)
+        for(int64_t y = std::max((int64_t)0, -oy); y < height; y++)
         {
             uint32_t *pixels = (uint32_t*)(img.scanLine(y));
             float iptr;
             float fy = std::modf((y + oy) * iscale - 0.5f, &iptr);
-            int py = iptr;
-            uint32_t w = py * rawImage->widthBytes();
-            uint32_t w2 = w;
+            int64_t py = iptr;
+            int64_t w = py * rawImage->widthBytes();
+            int64_t w2 = w;
             if(py+1 < imgHeight)w2 += rawImage->widthBytes();
             if(py >= imgHeight)break;
 
-            for(int x = std::max(0, -ox); x < width; x++)
+            for(int64_t x = std::max((int64_t)0, -ox); x < width; x++)
             {
                 float fx = std::modf((x + ox) * iscale - 0.5f, &iptr);
                 int px = iptr;
@@ -467,10 +467,10 @@ void ImageWidgetGL::paintGL()
 {
     float dx = m_dx;
     float dy = m_dy;
-    if(m_width > m_image->width() * m_scale)
-        dx = -width() * 0.5f + m_image->width() * m_scale * 0.5f;
-    if(m_height > m_image->height() * m_scale)
-        dy = -height() * 0.5f + m_image->height() * m_scale * 0.5f;
+    if(m_width > m_imgWidth * m_scale)
+        dx = -width() * 0.5f + m_imgWidth * m_scale * 0.5f;
+    if(m_height > m_imgHeight * m_scale)
+        dy = -height() * 0.5f + m_imgHeight * m_scale * 0.5f;
     QBrush highlight = style()->standardPalette().highlight();
 
     f->glClear(GL_COLOR_BUFFER_BIT);
diff --git a/rawimage.cpp b/rawimage.cpp
index 44ceff8..9462ba0 100644
--- a/rawimage.cpp
+++ b/rawimage.cpp
@@ -45,7 +45,7 @@ void RawImage::allocate(uint32_t w, uint32_t h, uint32_t ch, DataType type)
     m_channels = ch;
     m_ch = ch == 3 ? 4 : ch;
     m_origType = m_type = type;
-    m_pixels = std::make_unique<PixelType[]>(m_width * m_height * m_ch * typeSize(type));
+    m_pixels = std::make_unique<PixelType[]>((size_t)m_width * m_height * m_ch * typeSize(type));
 }
 
 RawImage::RawImage()
@@ -60,7 +60,7 @@ RawImage::RawImage(uint32_t w, uint32_t h, uint32_t ch, DataType type)
 RawImage::RawImage(const RawImage &d)
 {
     allocate(d.m_width, d.m_height, d.m_channels, d.m_type);
-    std::memcpy(m_pixels.get(), d.m_pixels.get(), m_width * m_height * m_ch * typeSize(m_type));
+    std::memcpy(m_pixels.get(), d.m_pixels.get(), (size_t)m_width * m_height * m_ch * typeSize(m_type));
     m_stats = d.m_stats;
 }
 
@@ -118,6 +118,24 @@ RawImage::RawImage(const QImage &img)
         for(int i=0; i<img.height(); i++)
             std::memcpy(data(i), img.scanLine(i), img.width()*2);
     }
+    else if(img.format() == QImage::Format_RGB32 || img.format() == QImage::Format_ARGB32)
+    {
+        allocate(img.width(), img.height(), 4, UINT8);
+        for(int i=0; i<img.height(); i++)
+        {
+            uint32_t *src = (uint32_t*)img.scanLine(i);
+            uint32_t *dst = (uint32_t*)data(i);
+            for(int o=0; o<img.width(); o++)
+            {
+                uint32_t p = src[o];
+#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
+                dst[o] = (p & 0xff000000) | (p >> 16 & 0xff) | (p & 0xff00) | (p << 16 & 0xff0000);
+#else
+                dst[o] = (p >> 24) | (p << 8 & 0xffffff00);
+#endif
+            }
+        }
+    }
     else
     {
         QImage tmp = img.convertToFormat(QImage::Format_RGBA8888);
@@ -294,9 +312,9 @@ uint32_t RawImage::channels() const
     return m_channels;
 }
 
-uint32_t RawImage::size() const
+uint64_t RawImage::size() const
 {
-    return width()*height();
+    return (uint64_t)width()*height();
 }
 
 RawImage::DataType RawImage::type() const
@@ -336,12 +354,12 @@ const void *RawImage::data() const
 
 void *RawImage::data(uint32_t row, uint32_t col)
 {
-    return m_pixels.get() + (m_width * row * m_ch + col * m_ch) * typeSize(m_type);
+    return m_pixels.get() + ((size_t)m_width * row * m_ch + (size_t)col * m_ch) * typeSize(m_type);
 }
 
 const void *RawImage::data(uint32_t row, uint32_t col) const
 {
-    return m_pixels.get() + (m_width * row * m_ch + col * m_ch) * typeSize(m_type);
+    return m_pixels.get() + ((size_t)m_width * row * m_ch + (size_t)col * m_ch) * typeSize(m_type);
 }
 
 const void *RawImage::origData() const
@@ -356,12 +374,12 @@ const void *RawImage::origData(uint32_t row, uint32_t col) const
 {
     if(m_original)
     {
-        col = col * m_origWidth / m_width;
-        row = row * m_origHeight / m_height;
-        return m_original.get() + (m_origWidth * row * m_ch + col * m_ch) * typeSize(m_origType);
+        col = (uint64_t)col * m_origWidth / m_width;
+        row = (uint64_t)row * m_origHeight / m_height;
+        return m_original.get() + ((size_t)m_origWidth * row * m_ch + (size_t)col * m_ch) * typeSize(m_origType);
     }
     else
-        return m_pixels.get() + (m_width * row * m_ch + col * m_ch) * typeSize(m_type);
+        return m_pixels.get() + ((size_t)m_width * row * m_ch + (size_t)col * m_ch) * typeSize(m_type);
 }
 
 bool RawImage::planar() const
@@ -381,12 +399,12 @@ void RawImage::convertToThumbnail()
 
     auto loop = [&](F16 *out, auto *in, float scale)
     {
-        for(int i=0; i<THUMB_SIZE; i++)
+        for(int64_t i=0; i<THUMB_SIZE; i++)
         {
-            for(int o=0; o<THUMB_SIZE; o++)
+            for(int64_t o=0; o<THUMB_SIZE; o++)
             {
-                int idx = (i*THUMB_SIZE + o)*4;
-                int idx2 = ((i * m_height / THUMB_SIZE * m_width) + (o * m_width / THUMB_SIZE)) * m_ch;
+                int64_t idx = (i*THUMB_SIZE + o)*4;
+                int64_t idx2 = ((i * m_height / THUMB_SIZE * m_width) + (o * m_width / THUMB_SIZE)) * m_ch;
 
                 if(m_channels == 1)
                 {
@@ -442,21 +460,21 @@ void RawImage::convertToGLFormat()
 }
 
 template<typename T, typename U>
-void convertType2(uint32_t size, const T *src, U *dst)
+void convertType2(size_t size, const T *src, U *dst)
 {
     if constexpr((std::is_floating_point_v<T> || std::is_same_v<T, F16>) && (std::is_floating_point_v<U> || std::is_same_v<T, F16>))
     {
-        for(uint32_t i = 0; i < size; i++)
+        for(size_t i = 0; i < size; i++)
             dst[i] = src[i];
     }
 
     if constexpr(std::is_integral_v<T> && std::is_integral_v<U>)
     {
         if constexpr(sizeof(T) > sizeof(U))
-            for(uint32_t i = 0; i < size; i++)
+            for(size_t i = 0; i < size; i++)
                 dst[i] = src[i] >> ((sizeof(T) - sizeof(U)) * 8);
         else
-            for(uint32_t i = 0; i < size; i++)
+            for(size_t i = 0; i < size; i++)
                 dst[i] = static_cast<U>(src[i]) << ((sizeof(U) - sizeof(T)) * 8);
     }
 
@@ -464,20 +482,20 @@ void convertType2(uint32_t size, const T *src, U *dst)
     {
         U max = std::numeric_limits<U>::max();
         T scale = (T)(max);
-        for(uint32_t i = 0; i < size; i++)
+        for(size_t i = 0; i < size; i++)
             dst[i] = src[i] * scale;
     }
 
     if constexpr(std::is_integral_v<T> && (std::is_floating_point_v<U> || std::is_same_v<U, F16>))
     {
         U scale = (U)(1.0 / (double)std::numeric_limits<T>::max());
-        for(uint32_t i = 0; i < size; i++)
+        for(size_t i = 0; i < size; i++)
             dst[i] = (U)src[i] * scale;
     }
 }
 
 template<typename T>
-void convertType(uint32_t size, RawImage::DataType dstType, const T *src, void *dst)
+void convertType(size_t size, RawImage::DataType dstType, const T *src, void *dst)
 {
     switch(dstType)
     {
@@ -514,7 +532,7 @@ void RawImage::convertToType(DataType type)
     allocate(m_width, m_height, m_channels, type);
     m_origType = origType;
 
-    uint32_t s = size() * m_ch;
+    size_t s = size() * m_ch;
     switch(m_origType)
     {
     case UINT8:
@@ -656,15 +674,15 @@ void boxResample(uint32_t w, uint32_t h, uint32_t ch, uint32_t oldw, uint32_t ol
 
     float sx = (float)w / oldw;
     float sy = (float)h / oldh;
-    for(uint32_t y = 0; y < h; y++)//iterate over destination Y
+    for(uint64_t y = 0; y < h; y++)//iterate over destination Y
     {
-        for(uint32_t x = 0; x < w; x++)//iterate over destination X
+        for(uint64_t x = 0; x < w; x++)//iterate over destination X
         {
             U p[4] = {0.0f};
-            uint32_t xx = x * oldw / w;//calculate source rect
-            uint32_t yy = y * oldh / h;
-            uint32_t xe = std::min((x + 1) * oldw / w, oldw - 1);
-            uint32_t ye = std::min((y + 1) * oldh / h, oldh - 1);
+            uint64_t xx = x * oldw / w;//calculate source rect
+            uint64_t yy = y * oldh / h;
+            uint64_t xe = std::min((x + 1) * oldw / w, (uint64_t)oldw - 1);
+            uint64_t ye = std::min((y + 1) * oldh / h, (uint64_t)oldh - 1);
             for(uint32_t o = yy; o <= ye; o++)//iterate over source Y
             {
                 float cy = o * sy - y;
diff --git a/rawimage.h b/rawimage.h
index c565025..1e41dcc 100644
--- a/rawimage.h
+++ b/rawimage.h
@@ -89,7 +89,7 @@ public:
     uint32_t width() const;
     uint32_t height() const;
     uint32_t channels() const;
-    uint32_t size() const;
+    uint64_t size() const;
     DataType type() const;
     uint32_t norm() const;
     uint32_t widthBytes() const;