darksylinc
commented
3 years ago A small nitpick that is probably not of relevance on macOS GL3 (but relevant everywhere else).
You first clear but then tell the GPU to ignore that clear:
target rt_output
{
// Clear to yellow
pass clear
{
colour_value 1 1 0 1
}
// Copy texture from rt_green
pass render_quad
{
//use_quad yes
load { all dont_care }
material Ogre/Copy/4xFP32
input 0 rt_green
}
}This is because the 2nd pass says "dont_care", you're literally saying I don't care what was in the render target I am about to render to (which you just cleared).
A fix would be to just do:
target rt_output
{
// Copy texture from rt_green
pass render_quad
{
//use_quad yes
load
{
all clear
// Clear to yellow
clear_colour 1 1 0 1
}
material Ogre/Copy/4xFP32
input 0 rt_green
}
}
srmainwaring
System Information
Detailled description
When using a compositor that uses a local texture (e.g.
Postprocessing.compositor) on macOS with the GL3+ render system; the local textures do not seem to be working properly.To trace the problem I created a simple compositor example available here: https://github.com/srmainwaring/ogre-next/tree/feature/v2-2-macos-sample-compositor.
The compositor clears a local texture to a colour (green for the example below) and the render window to yellow, then a render_quad pass is used to copy the local texture to the render window.
I use a modified version of the
Copyback_4xFP32_ps.glslshader to display the channels in quadrants (with a similar version for metal):Metal
The metal version works as expected with the green quadrant visible and the alpha quadrant white.
GL3+
The GL3+ version does not show green. The blue quadrant is visible and the alpha channel is not white.
Setting the pixel shader to display the texture coordinates confirms that the GLSL Quad vertex shader is working correctly, which points to a possible issue with the
GL3PlusTextureGpuRenderTargeton macOS.There doesn't seem to be anything in the log to indicate an OpenGL compilation error (this with
ENABLE_GL_CHECK 1inOgreGL3PlusPrerequisites.h).Ogre.log