Public bug reported:
I have tested with 2 diferent pakages zoogie's and yours. With zoogies
packages is not problem with transparency but yes with this.
I have installed 14.04 sdlttf2 package for run my app, I have maked one
vapie for use sdl2 in vala/genie languages. Then i make one surface
using sdlttf2 and i transform it transparent using one loop writing the
fourth value(transparent value) to 0. Then, when i write again on this
surface with coloured letter or black letters... the letters dont
appears, why? because all the surface's alpha channel seems transformed.
When i make this with zoogies sdl2 package all is right. What are the
differences betwen these packages?
code valac/genie:
/// create a surface with the text measures.
r:Surface = Fuente.render_blended_utf8 (sin_formato(s),{0,0,0,255})
// set transparente will sets the fourth value of the pixels (transparency) to 0
for var i=0 to (r.w-1) do for var j=0 to (r.h-1) do
sdlk.set_transparente(i,j,ref r,0)
// Create a new surface
mio:Surface = Fuente.render_blended_utf8 ("hello",{0,0,0,255})
// blit mio surface into r surface. With zoogie's package i can see hello,
with yours is not possible.
mio.blit({0,0,mio.w,mio.h},r,{pos_x,0,mio.w,mio.h})
Thanks.
** Affects: libsdl2 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1254673
Title:
Transparency problems
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