Brandon Jones | 5bf9829 | 2014-06-06 17:19:38 -0700 | [diff] [blame] | 1 | // |
| 2 | // Copyright 2014 The ANGLE Project Authors. All rights reserved. |
| 3 | // Use of this source code is governed by a BSD-style license that can be |
| 4 | // found in the LICENSE file. |
| 5 | // |
| 6 | // Implementation of the state class for mananging GLES 3 Vertex Array Objects. |
| 7 | // |
| 8 | |
Brandon Jones | 5bf9829 | 2014-06-06 17:19:38 -0700 | [diff] [blame] | 9 | #include "libGLESv2/VertexAttribute.h" |
| 10 | |
| 11 | namespace gl |
| 12 | { |
| 13 | |
| 14 | VertexAttribute::VertexAttribute() |
| 15 | : enabled(false), |
| 16 | type(GL_FLOAT), |
| 17 | size(4), |
| 18 | normalized(false), |
| 19 | pureInteger(false), |
| 20 | stride(0), |
| 21 | pointer(NULL), |
| 22 | divisor(0) |
| 23 | { |
| 24 | } |
| 25 | |
| 26 | size_t ComputeVertexAttributeTypeSize(const VertexAttribute& attrib) |
| 27 | { |
| 28 | GLuint size = attrib.size; |
| 29 | switch (attrib.type) |
| 30 | { |
| 31 | case GL_BYTE: return size * sizeof(GLbyte); |
| 32 | case GL_UNSIGNED_BYTE: return size * sizeof(GLubyte); |
| 33 | case GL_SHORT: return size * sizeof(GLshort); |
| 34 | case GL_UNSIGNED_SHORT: return size * sizeof(GLushort); |
| 35 | case GL_INT: return size * sizeof(GLint); |
| 36 | case GL_UNSIGNED_INT: return size * sizeof(GLuint); |
| 37 | case GL_INT_2_10_10_10_REV: return 4; |
| 38 | case GL_UNSIGNED_INT_2_10_10_10_REV: return 4; |
| 39 | case GL_FIXED: return size * sizeof(GLfixed); |
| 40 | case GL_HALF_FLOAT: return size * sizeof(GLhalf); |
| 41 | case GL_FLOAT: return size * sizeof(GLfloat); |
| 42 | default: UNREACHABLE(); return size * sizeof(GLfloat); |
| 43 | } |
| 44 | } |
| 45 | |
| 46 | size_t ComputeVertexAttributeStride(const VertexAttribute& attrib) |
| 47 | { |
| 48 | if (!attrib.enabled) |
| 49 | { |
| 50 | return 16; |
| 51 | } |
| 52 | return attrib.stride ? attrib.stride : ComputeVertexAttributeTypeSize(attrib); |
| 53 | } |
| 54 | |
| 55 | } |