Can I see shader preprocessor output?

Posted by GLaddict on Stack Overflow See other posts from Stack Overflow or by GLaddict
Published on 2009-06-04T19:43:16Z Indexed on 2010/03/27 15:13 UTC
Read the original article Hit count: 270

Filed under:

shader

|

preprocessor

I am using #defines, which I pass runtime to my shader sources based on program state, to optimize my huge shaders to be less complex. I would like to write the optimized shader to a file so that next time I run my program, I do not have to pass the #defines again, but I can straight compile the optimized shaders during program startup because now I know what kind of shaders by program needs.

Is there a way to get the result from shader preprocessor? I can of course store the #define values to a file and based on that compile the shaders during program startup but that would not be as elegant.

© Stack Overflow or respective owner

Related posts about shader

Driver error when using multiple shaders

as seen on Game Development - Search for 'Game Development'
I'm using 3 different shaders: a tessellation shader to use the tessellation feature of DirectX11 :) a regular shader to show how it would look without tessellation and a text shader to display debug-info such as FPS, model count etc. All of these shaders are initialized at the beginning. Using… >>> More
Render To Texture Using OpenGL is not working but normal rendering works just fine

as seen on Game Development - Search for 'Game Development'
things I initialize at the beginning of the program I realize not all of these pertain to my issue I just copy and pasted what I had //overall initialized //things openGL related I initialize earlier on in the project glClearColor( 0.0f, 0.0f, 0.0f, 1.0f ); glClearDepth( 1.0f ); glEnable(GL_ALPHA_TEST); glEnable(… >>> More
Shadow volume shader optimization (GLSL)

as seen on Stack Overflow - Search for 'Stack Overflow'
I wondering if there is a way to optimize this vertex shader. This vertex shader projects (in the light direction) a vertex to the far plane if it is in the shadow. void main(void) { vec3 lightDir = (gl_ModelViewMatrix * gl_Vertex - gl_LightSource[0].position).xyz; // if… >>> More
Pixel shader wierd compilation error

as seen on Stack Overflow - Search for 'Stack Overflow'
hi, I'm experiencing with shaders a bit and I keep getting this weird compilation error that's driving me crazy! the following pixel shader code snippet: DirectionVector = normalize(f3LightPosition[i] - PixelPos); LightVec = PixelNormal - DirectionVector; //… >>> More
OpenGL Diffuse Lighting Shader Bug?

as seen on Stack Overflow - Search for 'Stack Overflow'
The Orange book, section 16.2, lists implementing diffuse lighting as: void main() { vec3 N = normalize(gl_NormalMatrix * gl_Normal); vec4 V = gl_ModelViewMatrix * gl_vertex; vec3 L = normalize(lightPos - V.xyz); gl_FrontColor = gl_Color * vec4(max(0.0, dot(N, L)); } However, when I run… >>> More

Related posts about preprocessor

Any other preprocessor directives in VBScript/Classic ASP?

as seen on Stack Overflow - Search for 'Stack Overflow'
The only pre-process directive that I know about in VBScript / Classic ASP is the #include. I don't know if that is the official name but I'm basically looking for code that can execute code or other instructions before the general VBScript. Are there any other such directives in VBScript? Such as… >>> More
Visual Studio 2008 Preprocessor wierdness

as seen on Stack Overflow - Search for 'Stack Overflow'
We have set-up a simple versioning system for our builds to ensure the built files always indicate whether they are Beta Debug or Beta Release builds I moved the file version info to to myapp.rc2 and created version.h // version.h // _DEBUG is defined by VS #define _BETA #ifdef… >>> More
Writing preprocessor directives to get string

as seen on Stack Overflow - Search for 'Stack Overflow'
Can you write preprocessor directives to return you a std::string or char*? For example: In case of integers: #define square(x) (x*x) int main() { int x = square(5); } I'm looking to do the same but with strings like a switch-case pattern. if pass 1 it should return "One" and 2 for "Two" so… >>> More
Are preprocessors obsolete in modern languages?

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello, I'm making a simple compiler for a simple pet language I'm creating and coming from a C background(though I'm writing it in Ruby) I wondered if a preprocessor is necessary. What do you think? Is a "dumb" preprocessor still necessary in modern languages? Would C#'s conditional compilation capabilities… >>> More
The Bizarre Hidden Powers of the Preprocessor? [closed]

as seen on Stack Overflow - Search for 'Stack Overflow'
The preprocessor in C and C++ deserves an entire essay on its own to explore its rich possibilities for obfuscation. It is true that the C++ (and C) preprocessor can be used for a lot of powerful stuff. #ifdefs and #defines are often used to determine platforms, compilers and backends. Manipulating… >>> More