The OpenVG Interface component provides header files for both OpenVG 1.0 and OpenVG 1.1. The OpenVG 1.0 headers are used by default. However, there is a variability point that can be used to change the header version. This allows a staged migration from OpenVG 1.0 to OpenVG 1.1.
Variant: ScreenPlay and non-ScreenPlay. Target audience: Device creators.
The variability point consists of adding the following #define identifiers to the system-wide OEM-specific variation HRH file.
| #define Identifier | Description |
|---|---|
__OPENVGHEADERS_USE_VG_1_1 |
Use this if you want to use the OpenVG 1.1 headers rather than the OpenVG 1.0 ones that are used by default. |
OPENVG_RESTRICTED_TO_1_0 |
Use this if you have an OpenVG 1.1 implementation but want to use it through the OpenVG 1.0 headers, effectively hiding any API later than OpenVG 1.0. |
The main openvg.h and vgu.h header files test whether these identifiers have been defined and redirects the header files to the appropriate version accordingly, like this:
#if defined(__OPENVGHEADERS_USE_VG_1_1) && !defined(OPENVG_RESTRICTED_TO_1_0) #include <VG/1.1/openvg.h> #else #include <VG/1.0/openvg.h> #endif
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