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updated readme to reflect cmake changes

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@ -5,14 +5,14 @@ A small 2D C++ Game Framework, using few dependencies and simple code to mainain
#### building #### building
- Requires C++17 and CMake 3.12+ - Requires C++17 and CMake 3.12+
- A single *Platform* backend must be enabled: - A single *Platform* implementation must be enabled:
- [SDL2](https://github.com/NoelFB/blah/blob/master/src/internal/platform_sdl2.cpp) can be enabled in CMake with `PLATFORM_SDL2`, and setting `SDL2_INCLUDE_DIRS` and `SDL2_LIBRARIES` - [SDL2](https://github.com/NoelFB/blah/blob/master/src/internal/platform_sdl2.cpp) can be enabled in CMake with `BLAH_PLATFORM_SDL2` (default)
- [WIN32](https://github.com/NoelFB/blah/blob/master/src/internal/platform_win32.cpp) (UNFINISHED) can be enabled in CMake with `PLATFORM_WIN32`. - [WIN32](https://github.com/NoelFB/blah/blob/master/src/internal/platform_win32.cpp) (UNFINISHED) can be enabled in CMake with `BLAH_PLATFORM_WIN32`
- Additional backends can be added by implementing the [Platform Backend](https://github.com/NoelFB/blah/blob/master/src/internal/platform.h) - Additional platforms can be added by implementing the [Platform Backend](https://github.com/NoelFB/blah/blob/master/src/internal/platform.h)
- A single *Graphics* backend must be enabled: - A single *Graphics* implementation must be enabled:
- [OpenGL](https://github.com/NoelFB/blah/blob/master/src/internal/graphics_gl.cpp) can be enabled in CMake with `GRAPHICS_OPENGL`. - [OpenGL](https://github.com/NoelFB/blah/blob/master/src/internal/graphics_gl.cpp) can be enabled in CMake with `BLAH_GRAPHICS_OPENGL` (default)
- [D3D11](https://github.com/NoelFB/blah/blob/master/src/internal/graphics_d3d11.cpp) can be enabled in CMake with `GRAPHICS_D3D11`. - [D3D11](https://github.com/NoelFB/blah/blob/master/src/internal/graphics_d3d11.cpp) can be enabled in CMake with `BLAH_GRAPHICS_D3D11`
- Additional backends can be added by implementing the [Graphics Backend](https://github.com/NoelFB/blah/blob/master/src/internal/graphics.h). - Additional graphics can be added by implementing the [Graphics Backend](https://github.com/NoelFB/blah/blob/master/src/internal/graphics.h)
#### notes #### notes
- There's no Shader abstraction, so the [Sprite Batcher](https://github.com/NoelFB/blah/blob/master/src/graphics/batch.cpp) has hard-coded GLSL/HLSL. This will need to change. - There's no Shader abstraction, so the [Sprite Batcher](https://github.com/NoelFB/blah/blob/master/src/graphics/batch.cpp) has hard-coded GLSL/HLSL. This will need to change.