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// ResourceManager.cpp: Implements the ResourceManager class, which tracks and
16// retrieves objects which may be shared by multiple Contexts.
17
18#include "ResourceManager.h"
19
20#include "Buffer.h"
21#include "Renderbuffer.h"
22#include "Texture.h"
23
24namespace es1
25{
26ResourceManager::ResourceManager()
27{
28	mRefCount = 1;
29}
30
31ResourceManager::~ResourceManager()
32{
33	while(!mBufferNameSpace.empty())
34	{
35		deleteBuffer(mBufferNameSpace.firstName());
36	}
37
38	while(!mRenderbufferNameSpace.empty())
39	{
40		deleteRenderbuffer(mRenderbufferNameSpace.firstName());
41	}
42
43	while(!mTextureNameSpace.empty())
44	{
45		deleteTexture(mTextureNameSpace.firstName());
46	}
47}
48
49void ResourceManager::addRef()
50{
51	mRefCount++;
52}
53
54void ResourceManager::release()
55{
56	if(--mRefCount == 0)
57	{
58		delete this;
59	}
60}
61
62// Returns an unused buffer name
63GLuint ResourceManager::createBuffer()
64{
65	return mBufferNameSpace.allocate();
66}
67
68// Returns an unused texture name
69GLuint ResourceManager::createTexture()
70{
71	return mTextureNameSpace.allocate();
72}
73
74// Returns an unused renderbuffer name
75GLuint ResourceManager::createRenderbuffer()
76{
77	return mRenderbufferNameSpace.allocate();
78}
79
80void ResourceManager::deleteBuffer(GLuint buffer)
81{
82	Buffer *bufferObject = mBufferNameSpace.remove(buffer);
83
84	if(bufferObject)
85	{
86		bufferObject->release();
87	}
88}
89
90void ResourceManager::deleteTexture(GLuint texture)
91{
92	Texture *textureObject = mTextureNameSpace.remove(texture);
93
94	if(textureObject)
95	{
96		textureObject->release();
97	}
98}
99
100void ResourceManager::deleteRenderbuffer(GLuint renderbuffer)
101{
102	Renderbuffer *renderbufferObject = mRenderbufferNameSpace.remove(renderbuffer);
103
104	if(renderbufferObject)
105	{
106		renderbufferObject->release();
107	}
108}
109
110Buffer *ResourceManager::getBuffer(unsigned int handle)
111{
112	return mBufferNameSpace.find(handle);
113}
114
115Texture *ResourceManager::getTexture(unsigned int handle)
116{
117	return mTextureNameSpace.find(handle);
118}
119
120Renderbuffer *ResourceManager::getRenderbuffer(unsigned int handle)
121{
122	return mRenderbufferNameSpace.find(handle);
123}
124
125void ResourceManager::checkBufferAllocation(unsigned int buffer)
126{
127	if(buffer != 0 && !getBuffer(buffer))
128	{
129		Buffer *bufferObject = new Buffer(buffer);
130		bufferObject->addRef();
131
132		mBufferNameSpace.insert(buffer, bufferObject);
133	}
134}
135
136void ResourceManager::checkTextureAllocation(GLuint texture, TextureType type)
137{
138	if(!getTexture(texture) && texture != 0)
139	{
140		Texture *textureObject;
141
142		if(type == TEXTURE_2D)
143		{
144			textureObject = new Texture2D(texture);
145		}
146		else if(type == TEXTURE_EXTERNAL)
147		{
148			textureObject = new TextureExternal(texture);
149		}
150		else
151		{
152			UNREACHABLE(type);
153			return;
154		}
155
156		textureObject->addRef();
157
158		mTextureNameSpace.insert(texture, textureObject);
159	}
160}
161
162void ResourceManager::checkRenderbufferAllocation(GLuint handle)
163{
164	if(handle != 0 && !getRenderbuffer(handle))
165	{
166		Renderbuffer *renderbufferObject = new Renderbuffer(handle, new Colorbuffer(0, 0, GL_RGBA4_OES, 0));
167		renderbufferObject->addRef();
168
169		mRenderbufferNameSpace.insert(handle, renderbufferObject);
170	}
171}
172
173}
174