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// VertexDataManager.h: Defines the VertexDataManager, a class that
16// runs the Buffer translation process.
17
18#ifndef LIBGLESV2_VERTEXDATAMANAGER_H_
19#define LIBGLESV2_VERTEXDATAMANAGER_H_
20
21#include "Context.h"
22#include "Device.hpp"
23
24#include <GLES2/gl2.h>
25
26namespace es2
27{
28
29struct TranslatedAttribute
30{
31 sw::StreamType type;
32 int count;
33 bool normalized;
34
35 unsigned int offset;
36 unsigned int stride; // 0 means not to advance the read pointer at all
37
38 sw::Resource *vertexBuffer;
39};
40
41class VertexBuffer
42{
43public:
44 VertexBuffer(unsigned int size);
45 virtual ~VertexBuffer();
46
47 void unmap();
48
49 sw::Resource *getResource() const;
50
51protected:
52 sw::Resource *mVertexBuffer;
53};
54
55class ConstantVertexBuffer : public VertexBuffer
56{
57public:
58 ConstantVertexBuffer(float x, float y, float z, float w);
59 ~ConstantVertexBuffer();
60};
61
62class StreamingVertexBuffer : public VertexBuffer
63{
64public:
65 StreamingVertexBuffer(unsigned int size);
66 ~StreamingVertexBuffer();
67
68 void *map(const VertexAttribute &attribute, unsigned int requiredSpace, unsigned int *streamOffset);
69 void reserveRequiredSpace();
70 void addRequiredSpace(unsigned int requiredSpace);
71
72protected:
73 unsigned int mBufferSize;
74 unsigned int mWritePosition;
75 unsigned int mRequiredSpace;
76};
77
78class VertexDataManager
79{
80public:
81 VertexDataManager(Context *context);
82 virtual ~VertexDataManager();
83
84 void dirtyCurrentValue(int index) { mDirtyCurrentValue[index] = true; }
85
86 GLenum prepareVertexData(GLint start, GLsizei count, TranslatedAttribute *outAttribs, GLsizei instanceId);
87
88private:
89 unsigned int writeAttributeData(StreamingVertexBuffer *vertexBuffer, GLint start, GLsizei count, const VertexAttribute &attribute);
90
91 Context *const mContext;
92
93 StreamingVertexBuffer *mStreamingBuffer;
94
95 bool mDirtyCurrentValue[MAX_VERTEX_ATTRIBS];
96 ConstantVertexBuffer *mCurrentValueBuffer[MAX_VERTEX_ATTRIBS];
97};
98
99}
100
101#endif // LIBGLESV2_VERTEXDATAMANAGER_H_
102