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 es1
26 {
27
Buffer(GLuint name)28 Buffer::Buffer(GLuint name) : NamedObject(name)
29 {
30 mContents = 0;
31 mSize = 0;
32 mUsage = GL_DYNAMIC_DRAW;
33 }
34
~Buffer()35 Buffer::~Buffer()
36 {
37 if(mContents)
38 {
39 mContents->destruct();
40 }
41 }
42
bufferData(const void * data,GLsizeiptr size,GLenum usage)43 void Buffer::bufferData(const void *data, GLsizeiptr size, GLenum usage)
44 {
45 if(mContents)
46 {
47 mContents->destruct();
48 mContents = 0;
49 }
50
51 mSize = size;
52 mUsage = usage;
53
54 if(size > 0)
55 {
56 const int padding = 1024; // For SIMD processing of vertices
57 mContents = new sw::Resource(size + padding);
58
59 if(!mContents)
60 {
61 return error(GL_OUT_OF_MEMORY);
62 }
63
64 if(data)
65 {
66 memcpy((void*)mContents->data(), data, size);
67 }
68 }
69 }
70
bufferSubData(const void * data,GLsizeiptr size,GLintptr offset)71 void Buffer::bufferSubData(const void *data, GLsizeiptr size, GLintptr offset)
72 {
73 if(mContents)
74 {
75 char *buffer = (char*)mContents->lock(sw::PUBLIC);
76 memcpy(buffer + offset, data, size);
77 mContents->unlock();
78 }
79 }
80
getResource()81 sw::Resource *Buffer::getResource()
82 {
83 return mContents;
84 }
85
86 }
87