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RendererModules/OpenGLES/Texture.h
1 /***********************************************************************
2  filename: CEGUIOpenGLESTexture.h
3  created: Sun Jan 11 2009
4  author: Paul D Turner
5 *************************************************************************/
6 /***************************************************************************
7  * Copyright (C) 2004 - 2009 Paul D Turner & The CEGUI Development Team
8  *
9  * Permission is hereby granted, free of charge, to any person obtaining
10  * a copy of this software and associated documentation files (the
11  * "Software"), to deal in the Software without restriction, including
12  * without limitation the rights to use, copy, modify, merge, publish,
13  * distribute, sublicense, and/or sell copies of the Software, and to
14  * permit persons to whom the Software is furnished to do so, subject to
15  * the following conditions:
16  *
17  * The above copyright notice and this permission notice shall be
18  * included in all copies or substantial portions of the Software.
19  *
20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
23  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
24  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
25  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
26  * OTHER DEALINGS IN THE SOFTWARE.
27  ***************************************************************************/
28 #ifndef _CEGUIOpenGLESTexture_h_
29 #define _CEGUIOpenGLESTexture_h_
30 
31 #include "CEGUI/Base.h"
32 #include "CEGUI/Renderer.h"
33 #include "CEGUI/Texture.h"
34 #include "CEGUI/RendererModules/OpenGLES/Renderer.h"
35 
36 // Start of CEGUI namespace section
37 namespace CEGUI
38 {
40 class OPENGLES_GUIRENDERER_API OpenGLESTexture : public Texture
41 {
42 public:
48  void setOpenGLESTexture(GLuint tex, const Sizef& size);
49 
57  GLuint getOpenGLESTexture() const;
58 
79  void setTextureSize(const Sizef& sz);
80 
88  void grabTexture();
89 
95  void restoreTexture();
96 
97  // implement abstract members from base class.
98  const String& getName() const;
99  const Sizef& getSize() const;
100  const Sizef& getOriginalDataSize() const;
101  const Vector2f& getTexelScaling() const;
102  void loadFromFile(const String& filename, const String& resourceGroup);
103  void loadFromMemory(const void* buffer, const Sizef& buffer_size,
104  PixelFormat pixel_format);
105  void blitFromMemory(const void* sourceData, const Rectf& area);
106  void blitToMemory(void* targetData);
107  bool isPixelFormatSupported(const PixelFormat fmt) const;
108 
109 protected:
110  // Friends (to allow construction and destruction)
111  friend Texture& OpenGLESRenderer::createTexture(const String&);
112  friend Texture& OpenGLESRenderer::createTexture(const String&, const String&, const String&);
113  friend Texture& OpenGLESRenderer::createTexture(const String&, const Sizef&);
114  friend Texture& OpenGLESRenderer::createTexture(const String&, GLuint, const Sizef&);
115  friend void OpenGLESRenderer::destroyTexture(const String&);
116  friend void OpenGLESRenderer::destroyTexture(Texture&);
117 
119  OpenGLESTexture(OpenGLESRenderer& owner, const String& name);
121  OpenGLESTexture(OpenGLESRenderer& owner, const String& name,
122  const String& filename, const String& resourceGroup);
124  OpenGLESTexture(OpenGLESRenderer& owner, const String& name,
125  const Sizef& size);
127  OpenGLESTexture(OpenGLESRenderer& owner, const String& name, GLuint tex,
128  const Sizef& size);
130  virtual ~OpenGLESTexture();
131 
133  void generateOpenGLESTexture();
134 
136  void updateCachedScaleValues();
137 
139  void cleanupOpenGLESTexture();
140 
142  void initPixelFormatFields(const PixelFormat fmt);
143 
145  void setTextureSize_impl(const Sizef& sz);
146 
148  void loadUncompressedTextureBuffer(const Sizef& buffer_size,
149  const void* buffer) const;
150 
152  void loadCompressedTextureBuffer(const Sizef& buffer_size,
153  const void* buffer) const;
154 
155  GLsizei getCompressedTextureSize(const Sizef& pixel_size) const;
156 
158  GLuint d_ogltexture;
160  Sizef d_size;
162  uint8* d_grabBuffer;
164  Sizef d_dataSize;
166  Vector2f d_texelScaling;
168  OpenGLESRenderer& d_owner;
170  const String d_name;
172  GLenum d_format;
174  GLenum d_subpixelFormat;
176  bool d_isCompressed;
177 };
178 
179 } // End of CEGUI namespace section
180 
181 
182 #endif // end of guard _CEGUIOpenGLESTexture_h_