architecture-build | 主流框架研究

I'm trying to use (a slightly-modified version of) Paul Smith's Advanced VPATH Method for Multi-Architecture Builds to build our app in different subdirectories, with different compiler flags for each one, based on environment variables passed to make on the command line.

The following Makefile is the simplified example of what we're doing:

• If the user calls make debug=1, the output target will be built into the _debug subdirectory with specific compiler flags
• If the user calls make release=1, the output target will be built into the _release subdirectory with specific compiler flags

I want to create a glow effect for my game. In order to keep this minimalistic let's say I want to glow an Image. :)

Starting with this one:

To get something like this:

It's a three step way.

• save all bright pixels from the scene (= luminescence)
• Apply a blur effect on those pixels (= blur)
• draw original picture and the blur texture ontop (= assemble)

Step 1 and 3 are no Problem. The blur part just doesn't want to work correctly.

Before I explain further, here's my luminescence result: (threshold = 0.67f)

An now when I blur this, I get some unlucky results: This black edge comes from the fact, that any transparent color is black vec4(0.0, 0.0, 0.0, 0.0). It's not an unkown Problem within SFML/GLSL, and the suggestion was to use SFML's sf::BlendMode for this and multiply the .rgb value of the final pixel color in the fragment shader with its alpha value. So I did and now this my result:

It's better, but definetely not good. The blur shader now also avarages out the surrounding pixels of the luminescence mask. After assembling it's just a blurry picture:

.. I tried "fixing" this in the shader files by checking if the pixel's alpha is zero. This way I don't value them when avaraging out. But since sf::BlendMode is activated, I don't know how alpha behaves now - So I deactivated the blendmode but I still have weird results. (at the very of this question I provided the code and a result from this attempt)

none of my attempts to fix this work. I really could use some help here. Maybe I'm doing something fundamentally wrong in the shaders.. here's the full code - If you want to compile it, make a folder resources with the 2 Fragment shaders and the background.jpg (in 1280x720).

luminescence.frag

I am trying to push my Rails app to Heroku and am getting the below error: