1The new OOo Canvas Framework 2============================ 3 4The new OpenOffice.org canvas framework is the successor of the system 5GUI and graphics backend VCL. Basic functionality is available, 6supplying just as much features as necessary to provide a 7VCL-equivalent feature set (except proper BiDi/CTL support). 8 9For migration purposes, the new canvas and VCL will be shipped with 10OpenOffice.org for quite some time, allowing a step-by-step adaptation 11of the applications. Therefore, the canvas and VCL must somehow 12interoperate, since new code, using the canvas, typically is embedded 13in a VCL-based environment (for example, the OOo windows are still 14provided by VCL. To render into such a window via the canvas, a canvas 15must be constructable from a VCL window). Thus, essentially two new 16methods are provided at VCL's window, namely Window::GetCanvas() and 17Window::GetFullScreenCanvas(). Apart from that small link, canvas and 18VCL are completely separated. 19 20The canvas framework currently consists of the following two new 21CVS modules, /gsl/canvas and /gsl/cppcanvas. Additionally, a new 22generic graphics tooling is used (but not exclusively by the canvas, 23Armin's recent drawing layer fixups also make use of it), which 24resides in /graphics/basegfx. From these modules, six libraries are 25currently delivered, namely vclcanvas.uno.dll, javacanvas.jar, 26directxcanvas.uno.dll, canvastools680mi.dll, cppcanvas680mi.dll, and 27basegfx680mi.dll. 28 29 30The new OOo slideshow engine 31============================ 32 33The new OpenOffice.org slideshow engine will replace the current 34Impress-embedded presentation framework with a fully independent UNO 35component, and it will be based on the new canvas. In its current 36state, it is able to provide a basic set of functionality, enabling 37the playback of simple presentations. It furthermore provides features 38like double-buffering, hardware-accelerated alpha-blending (currently 39not on all platforms) and anti-aliased rendering of all primitives. 40 41In a second step, this new slideshow engine will then be integrated 42with Impress model enhancements and extended PowerPoint import/export 43filters, to implement nearly all of PowerPoint's set of effects. 44 45The new slideshow engine is currently not accessible from the office 46UI, but included in the installations sets. Thus, other developers can 47start to use the new functionality, and base their own implementations 48on top of that. For the records, the respective UNO implementation of 49the slideshow resides in the slideshow.uno.dll library. 50 51