Texture Manager and OpenGLGraphic description

Version	Status	Date Updated	Updated By
710	Unknown	N/A	N/A
810	Unknown	N/A	N/A
1004	Unknown	N/A	N/A
1204	Unknown	N/A	N/A
1404	Unknown	N/A	N/A
Usage Information

TextureManager class

Texturing mechanism in OpenGL is next:

• read the data in a buffer where you know the format (for instance RGB or RGBA)
• convert it from pixel surface to a texture
• get an index that may be used to "paint the geometry" using glEnable(GL_TEXTURE_2D) call using different parameters, as current color, transparency, etc.

Restrictions of OpenGL implementation:

• OpenGL should be implemented in it's own thread, else the convert textures will not appear to the drawing.
• the textures should be sized as power of two, etc. and the scaling may take time to complete

The conclusion is simple,

The flow is next:

• OpenGLEngine creates an TextureManager
• at every frame at start we should

Manages multiple graphics and geometry lists:

• textures for pending for convert

std::list <OpenGLGraphic*> WaitForConvert;

• texture indexes which needs to be removed

std::list <OpenGLTexture> WaitForRelease;

• Geometry cache, it keeps all geometry with uniques IDs. It can be used for store local objects.

std::map<std::string, MeshFrame*> Graphics;