qcam: viewfinder_gl: Support #define in shaders

Prepare the infrastructure to support defining preprocessor macros in
shaders:

- Rename the fragmentShaderSrc_ member to fragmentShaderFile_ to reflect
  better that it contains a file name, not shader source code
- Add a new fragmentShaderDefines_ member to store preprocessor macros
- Prepend the macros to the shader source before compiling it

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>

0 files changed, 0 insertions, 0 deletions