michael@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef WEBGLVERTEXATTRIBDATA_H_
michael@0: #define WEBGLVERTEXATTRIBDATA_H_
michael@0: 
michael@0: namespace mozilla {
michael@0: 
michael@0: class WebGLBuffer;
michael@0: 
michael@0: struct WebGLVertexAttribData {
michael@0:     // note that these initial values are what GL initializes vertex attribs to
michael@0:     WebGLVertexAttribData()
michael@0:         : buf(0)
michael@0:         , stride(0)
michael@0:         , size(4)
michael@0:         , divisor(0) // OpenGL ES 3.0 specs paragraphe 6.2 p240
michael@0:         , byteOffset(0)
michael@0:         , type(LOCAL_GL_FLOAT)
michael@0:         , enabled(false)
michael@0:         , normalized(false)
michael@0:     { }
michael@0: 
michael@0:     WebGLRefPtr<WebGLBuffer> buf;
michael@0:     GLuint stride;
michael@0:     GLuint size;
michael@0:     GLuint divisor;
michael@0:     GLuint byteOffset;
michael@0:     GLenum type;
michael@0:     bool enabled;
michael@0:     bool normalized;
michael@0: 
michael@0:     GLuint componentSize() const {
michael@0:         switch(type) {
michael@0:             case LOCAL_GL_BYTE:
michael@0:                 return sizeof(GLbyte);
michael@0:                 break;
michael@0:             case LOCAL_GL_UNSIGNED_BYTE:
michael@0:                 return sizeof(GLubyte);
michael@0:                 break;
michael@0:             case LOCAL_GL_SHORT:
michael@0:                 return sizeof(GLshort);
michael@0:                 break;
michael@0:             case LOCAL_GL_UNSIGNED_SHORT:
michael@0:                 return sizeof(GLushort);
michael@0:                 break;
michael@0:             // XXX case LOCAL_GL_FIXED:
michael@0:             case LOCAL_GL_FLOAT:
michael@0:                 return sizeof(GLfloat);
michael@0:                 break;
michael@0:             default:
michael@0:                 NS_ERROR("Should never get here!");
michael@0:                 return 0;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     GLuint actualStride() const {
michael@0:         if (stride) return stride;
michael@0:         return size * componentSize();
michael@0:     }
michael@0: };
michael@0: 
michael@0: } // namespace mozilla
michael@0: 
michael@0: inline void ImplCycleCollectionUnlink(mozilla::WebGLVertexAttribData& aField)
michael@0: {
michael@0:   aField.buf = nullptr;
michael@0: }
michael@0: 
michael@0: inline void
michael@0: ImplCycleCollectionTraverse(nsCycleCollectionTraversalCallback& aCallback,
michael@0:                             mozilla::WebGLVertexAttribData& aField,
michael@0:                             const char* aName,
michael@0:                             uint32_t aFlags = 0)
michael@0: {
michael@0:   CycleCollectionNoteChild(aCallback, aField.buf.get(), aName, aFlags);
michael@0: }
michael@0: 
michael@0: #endif