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Add update() member for vbo.ElementBuffer class. #11

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merged 1 commit into from Sep 13, 2013
Merged

Add update() member for vbo.ElementBuffer class. #11

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16 changes: 16 additions & 0 deletions glamour/vbo.d
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Expand Up @@ -21,6 +21,8 @@ interface IBuffer {
void bind(); ///
void unbind(); ///
void set_data(T)(const ref T data, GLenum hint = GL_STATIC_DRAW); ///
void update(T)(const T data, GLintptr offset); ///
void update(T)(const T ptr, size_t size, GLintptr offset); /// should the interface have this overload member? set_date() have no overload version.
}

/// Represents an OpenGL element buffer.
Expand Down Expand Up @@ -92,6 +94,20 @@ class ElementBuffer : IBuffer {
length = size;
this.hint = hint;
}

/// Updates the Buffer, using glBufferSubData.
void update(T)(const T data, GLintptr offset) if(isArray!T) {
checkgl!glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buffer);
checkgl!glBufferSubData(GL_ELEMENT_ARRAY_BUFFER, offset, data.length*(ElementType!T).sizeof, data.ptr);
checkgl!glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
}

/// ditto
void update(T)(const T ptr, size_t size, GLintptr offset) if(isPointer!T) {
checkgl!glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buffer);
checkgl!glBufferSubData(GL_ELEMENT_ARRAY_BUFFER, offset, size, ptr);
checkgl!glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
}
}


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