diff options
Diffstat (limited to 'src/mbgl/gl/types.hpp')
| -rw-r--r-- | src/mbgl/gl/types.hpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/mbgl/gl/types.hpp b/src/mbgl/gl/types.hpp index 452c882ac9..da08195e58 100644 --- a/src/mbgl/gl/types.hpp +++ b/src/mbgl/gl/types.hpp @@ -15,8 +15,16 @@ using VertexArrayID = uint32_t; using FramebufferID = uint32_t; using RenderbufferID = uint32_t; +// OpenGL does not formally define a type for attribute locations, but most APIs use +// GLuint. The exception is glGetAttribLocation, which returns GLint so that -1 can +// be used as an error indicator. using AttributeLocation = uint32_t; + +// OpenGL does not formally define a type for uniform locations, but all APIs use GLint. +// The value -1 is special, typically used as a placeholder for an unused uniform and +// "silently ignored". using UniformLocation = int32_t; + using TextureUnit = uint8_t; enum class ShaderType : uint32_t { |