Texture2D.h
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- /*
- File: Texture2D.h
- Abstract: Creates OpenGL 2D textures from images or text.
- Version: 1.7
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- this notice and the following text and disclaimers in all such redistributions
- of the Apple Software.
- Neither the name, trademarks, service marks or logos of Apple Inc. may be used
- to endorse or promote products derived from the Apple Software without specific
- prior written permission from Apple. Except as expressly stated in this notice,
- no other rights or licenses, express or implied, are granted by Apple herein,
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- derivative works or by other works in which the Apple Software may be
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- The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO
- WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
- WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN
- COMBINATION WITH YOUR PRODUCTS.
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- Copyright (C) 2008 Apple Inc. All Rights Reserved.
- */
- #import <UIKit/UIKit.h>
- #import <OpenGLES/ES1/gl.h>
- //CONSTANTS:
- typedef enum {
- kTexture2DPixelFormat_Automatic = 0,
- kTexture2DPixelFormat_RGBA8888,
- kTexture2DPixelFormat_RGB565,
- kTexture2DPixelFormat_A8,
- } Texture2DPixelFormat;
- //CLASS INTERFACES:
- /*
- This class allows to easily create OpenGL 2D textures from images, text or raw data.
- The created Texture2D object will always have power-of-two dimensions.
- Depending on how you create the Texture2D object, the actual image area of the texture might be smaller than the texture dimensions i.e. "contentSize" != (pixelsWide, pixelsHigh) and (maxS, maxT) != (1.0, 1.0).
- Be aware that the content of the generated textures will be upside-down!
- */
- @interface Texture2D : NSObject
- {
- @private
- GLuint _name;
- CGSize _size;
- NSUInteger _width,
- _height;
- Texture2DPixelFormat _format;
- GLfloat _maxS,
- _maxT;
- }
- - (id) initWithData:(const void*)data pixelFormat:(Texture2DPixelFormat)pixelFormat pixelsWide:(NSUInteger)width pixelsHigh:(NSUInteger)height contentSize:(CGSize)size;
- @property(readonly) Texture2DPixelFormat pixelFormat;
- @property(readonly) NSUInteger pixelsWide;
- @property(readonly) NSUInteger pixelsHigh;
- @property(readonly) GLuint name;
- @property(readonly, nonatomic) CGSize contentSize;
- @property(readonly) GLfloat maxS;
- @property(readonly) GLfloat maxT;
- @end
- /*
- Drawing extensions to make it easy to draw basic quads using a Texture2D object.
- These functions require GL_TEXTURE_2D and both GL_VERTEX_ARRAY and GL_TEXTURE_COORD_ARRAY client states to be enabled.
- */
- @interface Texture2D (Drawing)
- - (void) drawAtPoint:(CGPoint)point;
- - (void) drawInRect:(CGRect)rect;
- @end
- /*
- Extensions to make it easy to create a Texture2D object from an image file.
- Note that RGBA type textures will have their alpha premultiplied - use the blending mode (GL_ONE, GL_ONE_MINUS_SRC_ALPHA).
- */
- @interface Texture2D (Image)
- - (id) initWithImage:(UIImage *)uiImage;
- @end
- /*
- Extensions to make it easy to create a Texture2D object from a string of text.
- Note that the generated textures are of type A8 - use the blending mode (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA).
- */
- @interface Texture2D (Text)
- - (id) initWithString:(NSString*)string dimensions:(CGSize)dimensions alignment:(UITextAlignment)alignment fontName:(NSString*)name fontSize:(CGFloat)size;
- @end