./shadertool <script/path> [options...]

.dir1 par1 par2
.dir2 par1 
.dir3 par1
...
.exec
ins1	a, b
ins2	a
ins3	a, b
...

.source name [path|@OPT] - defines frame source

.sink name [path|@OPT] - defines frame sink

.shader name [path|@OPT] - defines frame sink

.exec - begin executable section

pull reg, source - load frame from source into reg

push sink, reg - store frame into sink from reg

apply shader, [uniform=reg]... - run shader with uniforms and return frame to r0

jmp offset - change pc by relative offset

jmpif offset, [!]cond - change pc by relative offset if cond is true

mov dreg, [sreg|imm|obj.param] - copy value into dreg

add dreg, sreg - add value of sreg to dreg, sets zero flag if dreg is 0

main.cc - main logic, loads script file and runs interpreter

cmdline/args - cmdline argument parser

video/frame - structure for holding pixel data

video/frame_source - abstraction of media container, provides frames

video/frame_sink - abstraction of media container, receives frames

fs/remote_path - wrapper for storing path data, supports runtime resolution of references to cmdline arguments

script/file - abstraction of file contents

script/parser - parses script files

script/directives - implementation of directives

script/instructions - implementation of instructions

script/interpreter - interpreter of script files, applies directives and executes instructions

script/register - base class representing default storage type of interpreter

graphics/render_device - abstraction of rendering device, interfaces with OpenGL

graphics/render_target - abstraction of underlying OpenGL structures for receiving frames

graphics/shader - abstraction of shader loading/uploading

graphics/shader_program - abstraction of loaded shader program