Why do I need to compile shader code?
You also force all byte code to reside in memory even after the shader is created, which wastes resources. But when you include byte code in a header, you can reduce code complexity and simplify shader creation. Let’s now look at various ways to compile your shader code and conventions for file extensions for shader code.
What happens if you don’t use if else in shader?
Luckily shader compilers know this too, and will (usually) compile code to not do a real branch. So best case the shader compiles your code “flattened” where both sides always execute and then it chooses the results from one side and throws away the rest using the fast comparison.
Which is the worst case of a shader?
So best case the shader compiles your code “flattened” where both sides always execute and then it chooses the results from one side and throws away the rest using the fast comparison. The worst case is it does a real branch for something that doesn’t need it, or flattens it in a non optimal way.
How to compile a Shader into a CSO file?
In this example code from the Direct3D tutorial sample, the Ouput Files property for the SimpleVertexShader.hlsl file specifies to compile into the SimpleVertexShader.cso object file. If you compile your .hlsl files into byte arrays that are defined in header files, you need to include those header files in your code.
How to compile shader code in fxc.exe?
You typically use the fxc.exe HLSL code compiler as part of the build process to compile shader code. For more info about this, see Compiling Shaders. This topic shows how to use the D3DCompileFromFile function at run time to compile shader code. Compile HLSL shader code by calling D3DCompileFromFile .
How to get pointer to internal string in shader?
The c_str () method on the string gives you a pointer to the internal string data of the object. As explained above, this data is freed when allLines goes out of scope at the end of the shaderReader constructor, so you end up with a pointer to freed memory.