1 | // Copyright 2016 The SwiftShader Authors. All Rights Reserved. |
2 | // |
3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
4 | // you may not use this file except in compliance with the License. |
5 | // You may obtain a copy of the License at |
6 | // |
7 | // http://www.apache.org/licenses/LICENSE-2.0 |
8 | // |
9 | // Unless required by applicable law or agreed to in writing, software |
10 | // distributed under the License is distributed on an "AS IS" BASIS, |
11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
12 | // See the License for the specific language governing permissions and |
13 | // limitations under the License. |
14 | |
15 | // Buffer.cpp: Implements the Buffer class, representing storage of vertex and/or |
16 | // index data. Implements GL buffer objects and related functionality. |
17 | // [OpenGL ES 2.0.24] section 2.9 page 21. |
18 | |
19 | #include "Buffer.h" |
20 | |
21 | #include "main.h" |
22 | #include "VertexDataManager.h" |
23 | #include "IndexDataManager.h" |
24 | |
25 | namespace es2 |
26 | { |
27 | |
28 | Buffer::Buffer(GLuint name) : NamedObject(name) |
29 | { |
30 | mContents = 0; |
31 | mSize = 0; |
32 | mUsage = GL_STATIC_DRAW; |
33 | mIsMapped = false; |
34 | mOffset = 0; |
35 | mLength = 0; |
36 | mAccess = 0; |
37 | } |
38 | |
39 | Buffer::~Buffer() |
40 | { |
41 | if(mContents) |
42 | { |
43 | mContents->destruct(); |
44 | } |
45 | } |
46 | |
47 | void Buffer::bufferData(const void *data, GLsizeiptr size, GLenum usage) |
48 | { |
49 | if(mContents) |
50 | { |
51 | mContents->destruct(); |
52 | mContents = 0; |
53 | } |
54 | |
55 | mSize = size; |
56 | mUsage = usage; |
57 | |
58 | if(size > 0) |
59 | { |
60 | const int padding = 1024; // For SIMD processing of vertices |
61 | mContents = new sw::Resource(size + padding); |
62 | |
63 | if(!mContents) |
64 | { |
65 | return error(GL_OUT_OF_MEMORY); |
66 | } |
67 | |
68 | if(data) |
69 | { |
70 | char *buffer = (char*)mContents->data(); |
71 | memcpy(buffer + mOffset, data, size); |
72 | } |
73 | } |
74 | } |
75 | |
76 | void Buffer::bufferSubData(const void *data, GLsizeiptr size, GLintptr offset) |
77 | { |
78 | if(mContents && data) |
79 | { |
80 | char *buffer = (char*)mContents->lock(sw::PUBLIC); |
81 | memcpy(buffer + offset, data, size); |
82 | mContents->unlock(); |
83 | } |
84 | } |
85 | |
86 | void* Buffer::mapRange(GLintptr offset, GLsizeiptr length, GLbitfield access) |
87 | { |
88 | if(mContents) |
89 | { |
90 | char* buffer = (char*)mContents->lock(sw::PUBLIC); |
91 | mIsMapped = true; |
92 | mOffset = offset; |
93 | mLength = length; |
94 | mAccess = access; |
95 | return buffer + offset; |
96 | } |
97 | return nullptr; |
98 | } |
99 | |
100 | bool Buffer::unmap() |
101 | { |
102 | if(mContents) |
103 | { |
104 | mContents->unlock(); |
105 | } |
106 | mIsMapped = false; |
107 | mOffset = 0; |
108 | mLength = 0; |
109 | mAccess = 0; |
110 | return true; |
111 | } |
112 | |
113 | sw::Resource *Buffer::getResource() |
114 | { |
115 | return mContents; |
116 | } |
117 | |
118 | } |
119 | |