On Mon, May 14, 2012 at 8:32 AM, Lorenzo Marcantonio < [email protected]> wrote:
> On Sat, May 12, 2012 at 04:59:58PM +0200, Marco Serantoni wrote: > > - Not with CAIRO on windows, since > http://trac.wxwidgets.org/ticket/14194 was closed 4-5 weeks ago and tests > were conducted on GDI (only matrox supports this in HW). > > CAIRO is a showstopper on Linux without gallium (i.e. hw acceleration), > so the problem remain... > Lorenzo, if i recall correctly there is also an OpenGL backend that can be enabled setting an enviroment variable. > - We were using wxDC style, drawing immediate is more an handicap than a performance gaining approach with HW acceleration. I'm not familiar with this issue > Just see DoubleBuffered vs Non buffered wxDC, the first done first in memory then pushed on the Device, the second done directly on the device. > I'm almost scared to fight with a new Custom Graphics Abstration Layer. > > Do you have another idea to keep the current (very reasonable) > performance without hw accel and implementing hw accel support (most > probably with opengl)? > > I agree that is not a trivial problem to solve. There are worse in the > field :D for example: code for opengl supporting efficiently both triangle > streaming gpu (Intel/ATI/NVidia) *and* tile renderers (PowerVR): if you > think about it these are almost complementar way to handle rendering:P > > That and most open source drivers tends to have better performance in > the 2d graphics path... > http://cairographics.org/backends/ <http://cairographics.org/OpenGL/> --> cairo-gl && xlib We have usually a statically wireframe loaded, changed in small pieces and almost moved or zoomed. And those operations are easy to do doing operations with transformation matrix :) -- Marco
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