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_imageRes / num_across;
unsigned int tile_height = g_advancedSettings.m_imageRes / num_down;
unsigned int tile_gap = 1;
bool success = false;
// create a buffer for the resulting thumb
uint32_t *buffer = (uint32_t *)calloc(g_advancedSettings.m_imageRes * g_advancedSettings.m_imageRes, 4);
for (unsigned int i = 0; i < files.size(); ++i)
{
int x = i % num_across;
int y = i / num_across;
// load in the image
unsigned int width = tile_width - 2*tile_gap, height = tile_height - 2*tile_gap;
CBaseTexture *texture = CTexture::LoadFromFile(files[i], width, height, true);
if (texture && 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()))
{
success = true; // Flag that we at least had one successful image processed
// 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_imageRes;
uint32_t *src = scaled;
for (unsigned int y = 0; y < height; ++y)
{
memcpy(dest, src, width*4);
dest += g_advancedSettings.m_imageRes;
src += width;
}
}
}
delete[] scaled;
}
delete texture;
}
// now save to a file
if (success)
success = CreateThumbnailFromSurface((uint8_t *)buffer, g_advancedSettings.m_imageRes, g_advancedSettings.m_imageRes,
g_advancedSettings.m_imageRes * 4, thumb);
free(buffer);
return success;
}
CBaseTexture *CTextureCacheJob::LoadImage(const CStdString &image, unsigned int width, unsigned int height, const std::string &additional_info)
{
if (additional_info == "music")
{ // special case for embedded music images
MUSIC_INFO::EmbeddedArt art;
if (CMusicThumbLoader::GetEmbeddedThumb(image, art))
return CBaseTexture::LoadFromFileInMemory(&art.data[0], art.size, art.mime, width, height);
}
// 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/") && !file.GetMimeType().Equals("application/octet-stream")) // ignore non-pictures
return NULL;
CBaseTexture *texture = CBaseTexture::LoadFromFile(image, width, height, g_guiSettings.GetBool("pictures.useexifrotation"));
if (!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 we have an additional <flipX> on the left, which is equivalent to toggling the last bit
if (additional_info == "flipped")
texture->SetOrientation(texture->GetOrientation() ^ 1);
return texture;
}
bool CTextureCacheJob::CacheTexture(CBaseTexture **out_texture)
{
// unwrap the URL as required
bool flipped;
unsigned int width, height;
CStdString image = DecodeImageURL(m_url, width, height, flipped);
m_details.updateable = UpdateableURL(image);
// generate the hash
m_details.hash = GetImageHash(image);
if (m_details.hash.empty())
return false;
else if (m_details.hash == m_oldHash)
return true;
CBaseTexture *texture = LoadImage(image, width, height, flipped);
if (texture)
{
if (texture->HasAlpha())
m_details.file = m_cachePath + ".png";
else
m_details.file = m_cachePath + ".jpg";
if (width > 0 && height > 0)
CLog::Log(LOGDEBUG, "%s image '%s' at %dx%d with orientation %d as '%s'", m_oldHash.IsEmpty() ? "Caching" : "Recaching", image.c_str(),
width, height, texture->GetOrientation(), m_details.file.c_str());
else
CLog::Log(LOGDEBUG, "%s image '%s' fullsize with orientation %d as '%s'", m_oldHash.IsEmpty() ? "Caching" : "Recaching", image.c_str(),
texture->GetOrientation(), m_details.file.c_str());
if (CPicture::CacheTexture(texture, width, height, CTextureCache::GetCachedPath(m_details.file)))
{
m_details.width = width;
m_details.height = height;
if (out_texture) // caller wants the texture
*out_texture = texture;
else
delete texture;
return true;
}
}
delete texture;
return false;
}