diff options
author | PolyFloyd <floyd@polyfloyd.net> | 2014-04-29 22:40:27 +0200 |
---|---|---|
committer | PolyFloyd <floyd@polyfloyd.net> | 2014-04-29 22:40:27 +0200 |
commit | 35e82469106d2bc6391736ddcc18559c1cb81532 (patch) | |
tree | 65efd13a7cd4e958bb497b2891eee5b029abdee0 | |
parent | c06827a70e7bc851e492935456d35cec7ee27abd (diff) | |
download | gl-35e82469106d2bc6391736ddcc18559c1cb81532.tar.gz |
Added MapBuffer convenience functions for slices
-rw-r--r-- | buffer.go | 22 |
1 files changed, 22 insertions, 0 deletions
@@ -7,6 +7,7 @@ package gl // #include "gl.h" import "C" import "unsafe" +import "reflect" // Buffer Objects @@ -81,6 +82,27 @@ func MapBuffer(target GLenum, access GLenum) unsafe.Pointer { return unsafe.Pointer(C.glMapBuffer(C.GLenum(target), C.GLenum(access))) } +// Maps the buffer with MapBuffer() and returns a pointer to the slice pointing +// to the mapped buffer. See also the MapBuffer<Type> convenience functions. +func MapBufferSlice(target GLenum, access GLenum, bytesPerElement int) unsafe.Pointer { + rawLength := int(GetBufferParameteriv(target, BUFFER_SIZE)) + return unsafe.Pointer(&reflect.SliceHeader{ + Data: uintptr(MapBuffer(target, access)), + Len: rawLength / bytesPerElement, + Cap: rawLength / bytesPerElement, + }) +} + +// Map a buffer object's data store and return it as a slice +func MapBufferFloat32(target GLenum, access GLenum) []float32 { + return *(*[]float32)(MapBufferSlice(target, access, 4)) +} + +// Map a buffer object's data store and return it as a slice +func MapBufferUint32(target GLenum, access GLenum) []uint32 { + return *(*[]uint32)(MapBufferSlice(target, access, 4)) +} + // Unmap a buffer object's data store func UnmapBuffer(target GLenum) bool { return goBool(C.glUnmapBuffer(C.GLenum(target))) |