Hack of the bgfx shaderc tools in library version to compile bgfx shaders source at runtime. Inspired from Lumix engine code.
- It use the original shaderc code without doing any modification, it's just a wrapper (easy to keep updated with bgfx).
- Compiled shaders are built at application runtime in memory without any write file access to disk.
Drop content in bgfx folder and build bgfx as usual. This will build 'brtshaderc' a library version of shaderc than can be linked to your project.
#include <brtshaderc.h>
...
// compile vertex shader, with default arguments.
const bgfx::Memory* memVsh = shaderc::compileShader(shaderc::ST_VERTEX, "vs_cubes.sc");
bgfx::ShaderHandle vsh = bgfx::createShader(memVsh);
// compile fragment shader, with specific arguments for defines, varying def file, shader profile.
const bgfx::Memory* memFsh = shaderc::compileShader(shaderc::ST_FRAGMENT, "fs_cubes.sc", "myDefines", "varying.def.sc", "ps_5_0");
bgfx::ShaderHandle fsh = bgfx::createShader(memFsh);
// build program using shaders
mProgram = bgfx::createProgram(vsh, fsh, true);or using arguments list syntax style (same as binary version) :
int argc = 0;
const char* argv[16];
argv[argc++] = "-f";
argv[argc++] = "vs_cubes.sc";
argv[argc++] = "--varyingdef";
argv[argc++] = "varying.def.sc";
argv[argc++] = "--type";
argv[argc++] = "v";
argv[argc++] = "--platform";
argv[argc++] = "windows";
argv[argc++] = "--profile";
argv[argc++] = "ps_4_0";
const bgfx::Memory* memVsh = shaderc::compileShader(argc, argv);
bgfx::ShaderHandle vsh = bgfx::createShader(memVsh);