/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #include "WebGLVertexAttribData.h" #include "GLContext.h" #include "WebGLBuffer.h" #include "WebGLContext.h" namespace mozilla { static uint8_t CalcBytesPerVertex(GLenum type, uint8_t size) { uint8_t bytesPerType; switch (type) { case LOCAL_GL_INT_2_10_10_10_REV: case LOCAL_GL_UNSIGNED_INT_2_10_10_10_REV: return 4; case LOCAL_GL_BYTE: case LOCAL_GL_UNSIGNED_BYTE: bytesPerType = 1; break; case LOCAL_GL_HALF_FLOAT: case LOCAL_GL_SHORT: case LOCAL_GL_UNSIGNED_SHORT: bytesPerType = 2; break; case LOCAL_GL_FIXED: // GLES 3.0.4 p9: 32-bit signed, with 16 fractional bits. case LOCAL_GL_FLOAT: case LOCAL_GL_INT: case LOCAL_GL_UNSIGNED_INT: bytesPerType = 4; break; default: MOZ_CRASH("Bad `type`."); } return bytesPerType * size; } static GLenum AttribPointerBaseType(bool integerFunc, GLenum type) { if (!integerFunc) return LOCAL_GL_FLOAT; switch (type) { case LOCAL_GL_BYTE: case LOCAL_GL_SHORT: case LOCAL_GL_INT: return LOCAL_GL_INT; case LOCAL_GL_UNSIGNED_BYTE: case LOCAL_GL_UNSIGNED_SHORT: case LOCAL_GL_UNSIGNED_INT: return LOCAL_GL_UNSIGNED_INT; default: MOZ_CRASH(); } } void WebGLVertexAttribData::VertexAttribPointer(bool integerFunc, WebGLBuffer* buf, uint8_t size, GLenum type, bool normalized, uint32_t stride, uint64_t byteOffset) { mIntegerFunc = integerFunc; WebGLBuffer::SetSlot(0, buf, &mBuf); mType = type; mBaseType = AttribPointerBaseType(integerFunc, type); mSize = size; mBytesPerVertex = CalcBytesPerVertex(mType, mSize); mNormalized = normalized; mStride = stride; mExplicitStride = (mStride ? mStride : mBytesPerVertex); mByteOffset = byteOffset; } void WebGLVertexAttribData::DoVertexAttribPointer(gl::GLContext* gl, GLuint index) const { if (mIntegerFunc) { gl->fVertexAttribIPointer(index, mSize, mType, mStride, (const void*)mByteOffset); } else { gl->fVertexAttribPointer(index, mSize, mType, mNormalized, mStride, (const void*)mByteOffset); } } } // namespace mozilla