access/pointer to an irrlichtdriver-backbuffer ?

knightoflight · Post by **knightoflight** » Fri Sep 19, 2003 2:19 pm

does someone know access to the driver-backbuffer ? Pointer/address ?

niko · Post by **niko** » Fri Sep 19, 2003 2:36 pm

Not possible yet, sorry. What do you want to do with it? Making a screenshot or manipulating it? For saving screenshots, I've already planned to add a possiblity to do that.

knightoflight · Post by **knightoflight** » Sat Sep 20, 2003 10:20 am

there are many things one could do - i personally still thought about merging many textures - after createSurface is not possible (another thread) - i thought about merging textures with draw2DImage on a second irrlichtdevice, but isnt it nice, i can do, but no way to get to them ? Is it allowed to add the featue request for a mergeTexture-function (or is it already planned) ?

Guest · Post by **Guest** » Sat Sep 20, 2003 10:22 am

Why don't you simply lock a texture? You can access any pixel with that.

knightoflight · Post by **knightoflight** » Sat Sep 20, 2003 10:59 am

Ok, Mr. Guest, that wasnt really this thread, but ok:
yes i can lock a texture and access, for example the fuction below, like Niko suggested in the old forum, but its too slow, we need a fuction, that uses the Blitter-fuctions of directx in the base and its all there in irrlicht

//Merge textures Format R5G5B5, same width, same height, transparent color=0
void mergeTextures(video::ITexture* texture1, video::ITexture* texture2)
{
s16 *p1 = (s16*)texture1->lock();
s16 *p2 = (s16*)texture2->lock();

core::dimension2d<s32> dim;
dim = texture1->getDimension();
s32 pitch = texture1->getPitch()/2;

for (s32 x=0; x<dim.Width; ++x)
for (s32 y=0; y<dim.Height; ++y)
if ((p1[y*pitch + x] & 0x7FFF) !=0)
p2[y*pitch+x]=p1[y*pitch + x];

texture1->unlock();
texture2->unlock();
}