1 /*
2  -----------------------------------------------------------------------------
3  This source file is part of OGRE
4  (Object-oriented Graphics Rendering Engine)
5  For the latest info, see http://www.ogre3d.org/
6 
7  Copyright (c) 2000-2013 Torus Knot Software Ltd
8 
9  Permission is hereby granted, free of charge, to any person obtaining a copy
10  of this software and associated documentation files (the "Software"), to deal
11  in the Software without restriction, including without limitation the rights
12  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
13  copies of the Software, and to permit persons to whom the Software is
14  furnished to do so, subject to the following conditions:
15 
16  The above copyright notice and this permission notice shall be included in
17  all copies or substantial portions of the Software.
18 
19  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
22  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25  THE SOFTWARE.
26  -----------------------------------------------------------------------------
27  */
28 
29 #ifndef __GLES2NullStateCacheManagerImp_H__
30 #define __GLES2NullStateCacheManagerImp_H__
31 
32 #include "OgreGLES2Prerequisites.h"
33 
34 typedef Ogre::GeneralAllocatedObject StateCacheAlloc;
35 
36 namespace Ogre
37 {
38     /** An in memory cache of the OpenGL ES state.
39      @see GLES2StateCacheManager
40      */
41     class GLES2StateCacheManagerImp : public StateCacheAlloc
42     {
43     private:
44         /// Stores the current clear colour
45         vector<GLclampf>::type mClearColour;
46         /// Stores the current colour write mask
47         vector<GLboolean>::type mColourMask;
48         /// Stores the current depth write mask
49         GLboolean mDepthMask;
50         /// Stores the current polygon rendering mode
51         GLenum mPolygonMode;
52         /// Stores the current blend equation
53         GLenum mBlendEquation;
54         /// Stores the current face culling setting
55         GLenum mCullFace;
56         /// Stores the current depth test function
57         GLenum mDepthFunc;
58         /// Stores the current stencil mask
59         GLuint mStencilMask;
60         /// Stores the currently active texture unit
61         unsigned char mActiveTextureUnit;
62         /// Mask of buffers who contents can be discarded if GL_EXT_discard_framebuffer is supported
63         unsigned int mDiscardBuffers;
64         /// Stores the current depth clearing colour
65         GLclampf mClearDepth;
66 
67     public:
68         GLES2StateCacheManagerImp(void);
69         ~GLES2StateCacheManagerImp(void);
70 
71         /// See GLES2StateCacheManager.initializeCache.
72         void initializeCache();
73 
74         /// See GLES2StateCacheManager.clearCache.
75         void clearCache();
76 
77         /// See GLES2StateCacheManager.bindGLBuffer.
78         void bindGLBuffer(GLenum target, GLuint buffer, bool force = false);
79 
80         /// See GLES2StateCacheManager.deleteGLBuffer.
81         void deleteGLBuffer(GLenum target, GLuint buffer, bool force = false);
82 
83         /// See GLES2StateCacheManager.bindGLTexture.
84         void bindGLTexture(GLenum target, GLuint texture);
85 
86         /// See GLES2StateCacheManager.invalidateStateForTexture.
87         void invalidateStateForTexture(GLuint texture);
88 
89         /// See GLES2StateCacheManager.setTexParameteri.
90         void setTexParameteri(GLenum target, GLenum pname, GLint param);
91 
92         /// See GLES2StateCacheManager.setTexParameterf.
93         void setTexParameterf(GLenum target, GLenum pname, GLfloat params);
94 
95         /// See GLES2StateCacheManager.getTexParameterfv.
96         void getTexParameterfv(GLenum target, GLenum pname, GLfloat *params);
97 
98         /// See GLES2StateCacheManager.activateGLTextureUnit.
99         bool activateGLTextureUnit(unsigned char unit);
100 
101         /// See GLES2StateCacheManager.getBlendEquation.
getBlendEquation(void)102         GLenum getBlendEquation(void) const { return mBlendEquation; }
103 
104         /// See GLES2StateCacheManager.setBlendEquation.
105         void setBlendEquation(GLenum eq);
106 
107         /// See GLES2StateCacheManager.setBlendFunc.
108         void setBlendFunc(GLenum source, GLenum dest);
109 
110         /// See GLES2StateCacheManager.getDepthMask.
getDepthMask(void)111         GLboolean getDepthMask(void) const { return mDepthMask; }
112 
113         /// See GLES2StateCacheManager.setDepthMask.
114         void setDepthMask(GLboolean mask);
115 
116         /// See GLES2StateCacheManager.getDepthFunc.
getDepthFunc(void)117         GLenum getDepthFunc(void) const { return mDepthFunc; }
118 
119         /// See GLES2StateCacheManager.setDepthFunc.
120         void setDepthFunc(GLenum func);
121 
122         /// See GLES2StateCacheManager.getClearDepth.
getClearDepth(void)123         GLclampf getClearDepth(void) const { return mClearDepth; }
124 
125         /// See GLES2StateCacheManager.setClearDepth.
126         void setClearDepth(GLclampf depth);
127 
128         /// See GLES2StateCacheManager.setClearColour.
129         void setClearColour(GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha);
130 
131         /// See GLES2StateCacheManager.getColourMask.
getColourMask(void)132         vector<GLboolean>::type & getColourMask(void) { return mColourMask; }
133 
134         /// See GLES2StateCacheManager.setColourMask.
135         void setColourMask(GLboolean red, GLboolean green, GLboolean blue, GLboolean alpha);
136 
137         /// See GLES2StateCacheManager.getStencilMask.
getStencilMask(void)138         GLuint getStencilMask(void) const { return mStencilMask; }
139 
140         /// See GLES2StateCacheManager.setStencilMask.
141         void setStencilMask(GLuint mask);
142 
143         /// See GLES2StateCacheManager.setEnabled.
144         void setEnabled(GLenum flag);
145 
146         /// See GLES2StateCacheManager.setDisabled.
147         void setDisabled(GLenum flag);
148 
149         /// See GLES2StateCacheManager.setVertexAttribEnabled.
150         void setVertexAttribEnabled(GLuint attrib);
151 
152         /// See GLES2StateCacheManager.setVertexAttribDisabled.
153         void setVertexAttribDisabled(GLuint attrib);
154 
155         /// See GLES2StateCacheManager.getDiscardBuffers.
getDiscardBuffers(void)156         unsigned int getDiscardBuffers(void) const { return mDiscardBuffers; }
157 
158         /// See GLES2StateCacheManager.setDiscardBuffers.
setDiscardBuffers(unsigned int flags)159         void setDiscardBuffers(unsigned int flags) { mDiscardBuffers = flags; }
160 
161         /// See GLES2StateCacheManager.getPolygonMode.
getPolygonMode(void)162         GLenum getPolygonMode(void) const { return mPolygonMode; }
163 
164         /// See GLES2StateCacheManager.setPolygonMode.
setPolygonMode(GLenum mode)165         void setPolygonMode(GLenum mode) { mPolygonMode = mode; }
166 
167         /// See GLES2StateCacheManager.getCullFace.
getCullFace(void)168         GLenum getCullFace(void) const { return mCullFace; }
169 
170         /// See GLES2StateCacheManager.setCullFace.
171         void setCullFace(GLenum face);
172     };
173 }
174 
175 #endif
176