diff options
Diffstat (limited to 'doc/dw-images-and-backgrounds.doc')
| -rw-r--r-- | doc/dw-images-and-backgrounds.doc | 25 |
1 files changed, 15 insertions, 10 deletions
diff --git a/doc/dw-images-and-backgrounds.doc b/doc/dw-images-and-backgrounds.doc index e2a75981..bf1eda27 100644 --- a/doc/dw-images-and-backgrounds.doc +++ b/doc/dw-images-and-backgrounds.doc @@ -40,13 +40,10 @@ similar; only the implementation of dw::core::ImgRenderer differs. At this time, dw::core::ImgRenderer has got two methods (see more documentation there): -- dw::core::ImgRenderer::setBuffer and -- dw::core::ImgRenderer::drawRow. - -Possible extensions: - -- ''finished'': when all image data has been retrieved; -- ''fatal'': when there are problems with the retrieval of image data. +- dw::core::ImgRenderer::setBuffer, +- dw::core::ImgRenderer::drawRow, +- dw::core::ImgRenderer::finish, and +- dw::core::ImgRenderer::fatal. Images @@ -211,9 +208,17 @@ dw::core::View::drawImage, which may become slow. Solution: Create a new image buffer, which contains several copies of the original image. **Drawing background images row by row** may become slow. As an -alternative, the *finished* method (proposed above) in -dw::core::ImgRenderer could be used. However, drawing row by row could -become an option. +alternative, dw::core::ImgRenderer::finish could be used. However, +drawing row by row could become an option. **Update:** There is now +dw::core::style::drawBackgroundLineByLine, which can be changed in the +code. + +(For image widgets, this could also become an option: in contexts, +when image data is retrieved in a very fast way.) + +**Calls to dw::core::ImgRenderer::fatal** are incomplete. As an +example, it is not called, when connecting to a server fails. (And so, +as far as I see, no cache client is started.) Low Priority |