bool CPicture::CreateTiledThumb(const std::vector<std::string> &files, const std::string &thumb)
{
if (!files.size())
return false;
unsigned int num_across = (unsigned int)ceil(sqrt((float)files.size()));
unsigned int num_down = (files.size() + num_across - 1) / num_across;
unsigned int tile_width = g_advancedSettings.m_thumbSize / num_across;
unsigned int tile_height = g_advancedSettings.m_thumbSize / num_down;
unsigned int tile_gap = std::max(1,g_advancedSettings.m_thumbSize / 512);
// create a buffer for the resulting thumb
uint32_t *buffer = (uint32_t *)calloc(g_advancedSettings.m_thumbSize * g_advancedSettings.m_thumbSize, 4);
for (unsigned int i = 0; i < files.size(); ++i)
{
int x = i % num_across;
int y = i / num_across;
// load in the image
CTexture texture;
unsigned int width = tile_width - 2*tile_gap, height = tile_height - 2*tile_gap;
if (texture.LoadFromFile(files[i], width, height, g_guiSettings.GetBool("pictures.useexifrotation")) && texture.GetWidth() && texture.GetHeight())
{
GetScale(texture.GetWidth(), texture.GetHeight(), width, height);
// scale appropriately
uint32_t *scaled = new uint32_t[width * height];
if (ScaleImage(texture.GetPixels(), texture.GetWidth(), texture.GetHeight(), texture.GetPitch(),
(uint8_t *)scaled, width, height, width * 4))
{
if (!texture.GetOrientation() || OrientateImage(scaled, width, height, texture.GetOrientation()))
{
// drop into the texture
unsigned int posX = x*tile_width + (tile_width - width)/2;
unsigned int posY = y*tile_height + (tile_height - height)/2;
uint32_t *dest = buffer + posX + posY*g_advancedSettings.m_thumbSize;
uint32_t *src = scaled;
for (unsigned int y = 0; y < height; ++y)
{
memcpy(dest, src, width*4);
dest += g_advancedSettings.m_thumbSize;
src += width;
}
}
}
delete[] scaled;
}
}
// now save to a file
bool ret = CreateThumbnailFromSurface((uint8_t *)buffer, g_advancedSettings.m_thumbSize, g_advancedSettings.m_thumbSize,
g_advancedSettings.m_thumbSize * 4, thumb);
free(buffer);
return ret;
}
CBaseTexture *CTextureCacheJob::LoadImage(const CStdString &image, unsigned int width, unsigned int height, bool flipped)
{
// Validate file URL to see if it is an image
CFileItem file(image, false);
if (!(file.IsPicture() && !(file.IsZIP() || file.IsRAR() || file.IsCBR() || file.IsCBZ() ))
&& !file.GetMimeType().Left(6).Equals("image/")) // ignore non-pictures
return NULL;
CTexture *texture = new CTexture();
if (!texture->LoadFromFile(image, width, height, g_guiSettings.GetBool("pictures.useexifrotation")))
{
delete texture;
return NULL;
}
// EXIF bits are interpreted as: <flipXY><flipY*flipX><flipX>
// where to undo the operation we apply them in reverse order <flipX>*<flipY*flipX>*<flipXY>
// When flipped = true we have an additional <flipX> on the left, which is equivalent to toggling the last bit
if (flipped)
texture->SetOrientation(texture->GetOrientation() ^ 1);
return texture;
}
