scale images

[LuMo]

anyone got an idea about scaling an image over time?
(i do not mean x2,x3,x4... the pixels.)
more like photoshop.
thanks a lot
lumo

[KawaGeo]

We have a function for OpenGL. It is called glScale(size). It works in both 2D and 3D scenes. Size can be any number like 1.23 or 0.73.

If we have implementation for Lua Player, it would be gl.Scale(size). Too bad, we don't have the implementation yet.

Anyone dare to implement?

PS: I am switching old GLUT with a newer version called GLFW for my implementation in Windows environment.

PSS: I had compared FPS rates between codes in C/C++ and Lua. They are about the same!! Thanks to the power of GPU. Hence, Lua is no problem for being so slow.

[LuMo]

yeah could create a plane in GU apply texture and scale it...
thought there could be an easier way ;)

greets

[matriculated]

thought there could be an easier way ;)
greets

I hope that's a sign of things to come!

[LuMo]

thought there could be an easier way ;)
greets

I hope that's a sign of things to come!

what do you expect?

[my psprecious]

Hey LuMo

you think something can be done with this

function Image:magnify(mag)
mag = mag or 2 -- 2 times in size by default
local w = self:width()
local h = self:height()
local result = Image.createEmpty(mag*w, mag*h)
for x = 0, w-1 do
for y = 0, h-1 do
result:fillRect(mag*x, mag*y, mag,mag, self:pixel(x,y))
end
end
return result
end

My be a start for what I want, if only I understood exactly what it do, man my maths are far.....

[romero126]

nope cant be done with that :-)

[LuMo]

scaling&rotate is not trivial :o(
[except 90/180/etc rotation and x2,x3,etc scaling.]

[KawaGeo]

Yeah, but PSPgl or PSPgu is much faster, even with fractional arguments.

[LuMo]

i know :D as its using the hardware