3 commits

Author	SHA1	Message	Date
Filippo Argiolas	98752e51da	[423/906] convolution: generate gaussian kernel on the fly ... Generate a normalized gaussian kernel with given size and standard deviation on the fly. Remove "norm_const" uniform from convolution shaders and provide a normalized kernel instead. Remove norm_offset uniform as it was always zero, will reintroduce it if really needed in the future. Thanks to Eric Anholt for suggesting it. Save some ALU instruction calculating directly the coordinate for texture lookup instead of summing an offset. Still exceed maximum indirect texture lookups on i915, the only solution I see is using a 3x3 kernel.	2014-03-15 18:36:39 +01:00
Filippo Argiolas	d02a585e7b	[395/906] differencematte: fix regressions from gdkpixbuf to libpng migration ... The background image needs to be scaled to fit current texture size. Previously this was done by gdk_pixbuf_scale_simple but that's been removed. Create a texture from the background pixbuf with correct dimensions and use interpolation shader to scale it to the right size. Interpolation fragment shader doesn't have too much sense if all the textures don't have the same size so this seemed the most natural place to do the scaling. It could probably be done with some custom texture mapping outside the shader but it involved more code. Fixes bug #599883.	2014-03-15 18:36:37 +01:00
Tim-Philipp Müller	6516ecb3cc	[366/906] docs: make remaining elements show up in docs ... Split out declarations into header files and hook everything up so that five more elements show up in the plugin docs. Fixes #559135.	2014-03-15 18:36:36 +01:00