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/*

===== IMPORTANT =====

This is sample code demonstrating API, technology or techniques in development.
Although this sample code has been reviewed for technical accuracy, it is not
final. Apple is supplying this information to help you plan for the adoption of
the technologies and programming interfaces described herein. This information
is subject to change, and software implemented based on this sample code should
be tested with final operating system software and final documentation. Newer
versions of this sample code may be provided with future seeds of the API or
technology. For information about updates to this and other developer
documentation, view the New & Updated sidebars in subsequent documentation
seeds.

=====================

File: Texture2D.m
Abstract: Creates OpenGL 2D textures from images or text.

Version: 1.6

Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Inc.
("Apple") in consideration of your agreement to the following terms, and your
use, installation, modification or redistribution of this Apple software
constitutes acceptance of these terms. If you do not agree with these terms,
please do not use, install, modify or redistribute this Apple software.

In consideration of your agreement to abide by the following terms, and subject
to these terms, Apple grants you a personal, non-exclusive license, under
Apple's copyrights in this original Apple software (the "Apple Software"), to
use, reproduce, modify and redistribute the Apple Software, with or without
modifications, in source and/or binary forms; provided that if you redistribute
the Apple Software in its entirety and without modifications, you must retain
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,
including but not limited to any patent rights that may be infringed by your
derivative works or by other works in which the Apple Software may be
incorporated.

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.

IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR
DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF
CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF
APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Copyright (C) 2008 Apple Inc. All Rights Reserved.

*/

/*
* Support for RGBA_4_4_4_4 and RGBA_5_5_5_1 was copied from:
* https://devforums.apple.com/message/37855#37855 by a1studmuffin
*/

#import <OpenGLES/ES1/glext.h>

#import "ccConfig.h"
#import "ccMacros.h"
#import "CCTexture2D.h"
#import "CCPVRTexture.h"
#import "CCConfiguration.h"


#if CC_FONT_LABEL_SUPPORT
// FontLabel support
#import "FontManager.h"
#import "FontLabelStringDrawing.h"
#endif// CC_FONT_LABEL_SUPPORT


//CLASS IMPLEMENTATIONS:


// If the image has alpha, you can create RGBA8 (32-bit) or RGBA4 (16-bit) or RGB5A1 (16-bit)
// Default is: RGBA4444 (16-bit textures)
static Texture2DPixelFormat defaultAlphaPixelFormat = kTexture2DPixelFormat_Default;

@implementation CCTexture2D

@synthesize contentSize=_size, pixelFormat=_format, pixelsWide=_width, pixelsHigh=_height, name=_name, maxS=_maxS, maxT=_maxT;
@synthesize hasPremultipliedAlpha=_hasPremultipliedAlpha;
- (id) initWithData:(const void*)data pixelFormat:(Texture2DPixelFormat)pixelFormat pixelsWide:(NSUInteger)width pixelsHigh:(NSUInteger)height contentSize:(CGSize)size
{
// GLint saveName;
if((self = [super init])) {
glGenTextures(1, &_name);
// glGetIntegerv(GL_TEXTURE_BINDING_2D, &saveName);
glBindTexture(GL_TEXTURE_2D, _name);

[self setAntiAliasTexParameters];

// Specify OpenGL texture image

switch(pixelFormat)
{
case kTexture2DPixelFormat_RGBA8888:
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
break;
case kTexture2DPixelFormat_RGBA4444:
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4, data);
break;
case kTexture2DPixelFormat_RGB5A1:
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1, data);
break;
case kTexture2DPixelFormat_RGB565:
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, data);
break;
case kTexture2DPixelFormat_A8:
glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, width, height, 0, GL_ALPHA, GL_UNSIGNED_BYTE, data);
break;
default:
[NSException raise:NSInternalInconsistencyException format:@""];

}

// glBindTexture(GL_TEXTURE_2D, saveName);

_size = size;
_width = width;
_height = height;
_format = pixelFormat;
_maxS = size.width / (float)width;
_maxT = size.height / (float)height;

_hasPremultipliedAlpha = NO;
}
return self;
}

- (void) dealloc
{
CCLOG(@"cocos2d: deallocing %@", self);
if(_name)
glDeleteTextures(1, &_name);

[super dealloc];
}

- (NSString*) description
{
return [NSString stringWithFormat:@"<%@ = %08X | Name = %i | Dimensions = %ix%i | Coordinates = (%.2f, %.2f)>", [self class], self, _name, _width, _height, _maxS, _maxT];
}

@end

@implementation CCTexture2D (Image)

- (id) initWithImage:(UIImage *)uiImage
{
NSUInteger width,
height,
i;
CGContextRef context = nil;
void* data = nil;;
CGColorSpaceRef colorSpace;
void* tempData;
unsigned int* inPixel32;
unsigned short* outPixel16;
BOOL hasAlpha;
CGImageAlphaInfo info;
CGAffineTransform transform;
CGSize imageSize;
Texture2DPixelFormat pixelFormat;
CGImageRef image;
BOOL sizeToFit = NO;


image = [uiImage CGImage];

if(image == NULL) {
[self release];
NSLog(@"Image is Null");
return nil;
}


info = CGImageGetAlphaInfo(image);
hasAlpha = ((info == kCGImageAlphaPremultipliedLast) || (info == kCGImageAlphaPremultipliedFirst) || (info == kCGImageAlphaLast) || (info == kCGImageAlphaFirst) ? YES : NO);

size_t bpp = CGImageGetBitsPerComponent(image);
if(CGImageGetColorSpace(image)) {
if(hasAlpha || bpp >= 8)
pixelFormat = defaultAlphaPixelFormat;
else
pixelFormat = kTexture2DPixelFormat_RGB565;
} else //NOTE: No colorspace means a mask image
pixelFormat = kTexture2DPixelFormat_A8;

imageSize = CGSizeMake(CGImageGetWidth(image), CGImageGetHeight(image));
transform = CGAffineTransformIdentity;

width = imageSize.width;

if((width != 1) && (width & (width - 1))) {
i = 1;
while((sizeToFit ? 2 * i : i) < width)
i *= 2;
width = i;
}
height = imageSize.height;
if((height != 1) && (height & (height - 1))) {
i = 1;
while((sizeToFit ? 2 * i : i) < height)
i *= 2;
height = i;
}


unsigned maxTextureSize = [[CCConfiguration sharedConfiguration] maxTextureSize];
if( width > maxTextureSize || height > maxTextureSize ) {
CCLOG(@"cocos2d: WARNING: Image (%d x %d) is bigger than the supported %d x %d", width, height, maxTextureSize, maxTextureSize);
return nil;
}

// while((width > kMaxTextureSize) || (height > kMaxTextureSize)) {
// width /= 2;
// height /= 2;
// transform = CGAffineTransformScale(transform, 0.5f, 0.5f);
// imageSize.width *= 0.5f;
// imageSize.height *= 0.5f;
// }

// Create the bitmap graphics context

switch(pixelFormat) {
case kTexture2DPixelFormat_RGBA8888:
case kTexture2DPixelFormat_RGBA4444:
case kTexture2DPixelFormat_RGB5A1:
colorSpace = CGColorSpaceCreateDeviceRGB();
data = malloc(height * width * 4);
info = hasAlpha ? kCGImageAlphaPremultipliedLast : kCGImageAlphaNoneSkipLast;
context = CGBitmapContextCreate(data, width, height, 8, 4 * width, colorSpace, info | kCGBitmapByteOrder32Big);
CGColorSpaceRelease(colorSpace);
break;
case kTexture2DPixelFormat_RGB565:
colorSpace = CGColorSpaceCreateDeviceRGB();
data = malloc(height * width * 4);
info = kCGImageAlphaNoneSkipLast;
context = CGBitmapContextCreate(data, width, height, 8, 4 * width, colorSpace, info | kCGBitmapByteOrder32Big);
CGColorSpaceRelease(colorSpace);
break;
case kTexture2DPixelFormat_A8:
data = malloc(height * width);
info = kCGImageAlphaOnly;
context = CGBitmapContextCreate(data, width, height, 8, width, NULL, info);
break;
default:
[NSException raise:NSInternalInconsistencyException format:@"Invalid pixel format"];
}


CGContextClearRect(context, CGRectMake(0, 0, width, height));
CGContextTranslateCTM(context, 0, height - imageSize.height);

if(!CGAffineTransformIsIdentity(transform))
CGContextConcatCTM(context, transform);
CGContextDrawImage(context, CGRectMake(0, 0, CGImageGetWidth(image), CGImageGetHeight(image)), image);

// Repack the pixel data into the right format

if(pixelFormat == kTexture2DPixelFormat_RGB565) {
//Convert "RRRRRRRRRGGGGGGGGBBBBBBBBAAAAAAAA" to "RRRRRGGGGGGBBBBB"
tempData = malloc(height * width * 2);
inPixel32 = (unsigned int*)data;
outPixel16 = (unsigned short*)tempData;
for(i = 0; i < width * height; ++i, ++inPixel32)
*outPixel16++ = ((((*inPixel32 >> 0) & 0xFF) >> 3) << 11) | ((((*inPixel32 >> 8) & 0xFF) >> 2) << 5) | ((((*inPixel32 >> 16) & 0xFF) >> 3) << 0);
free(data);
data = tempData;

}
else if (pixelFormat == kTexture2DPixelFormat_RGBA4444) {
//Convert "RRRRRRRRRGGGGGGGGBBBBBBBBAAAAAAAA" to "RRRRGGGGBBBBAAAA"
tempData = malloc(height * width * 2);
inPixel32 = (unsigned int*)data;
outPixel16 = (unsigned short*)tempData;
for(i = 0; i < width * height; ++i, ++inPixel32)
*outPixel16++ =
((((*inPixel32 >> 0) & 0xFF) >> 4) << 12) | // R
((((*inPixel32 >> 8) & 0xFF) >> 4) << 8) | // G
((((*inPixel32 >> 16) & 0xFF) >> 4) << 4) | // B
((((*inPixel32 >> 24) & 0xFF) >> 4) << 0); // A


free(data);
data = tempData;

}
else if (pixelFormat == kTexture2DPixelFormat_RGB5A1) {
//Convert "RRRRRRRRRGGGGGGGGBBBBBBBBAAAAAAAA" to "RRRRRGGGGGBBBBBA"
tempData = malloc(height * width * 2);
inPixel32 = (unsigned int*)data;
outPixel16 = (unsigned short*)tempData;
for(i = 0; i < width * height; ++i, ++inPixel32)
*outPixel16++ =
((((*inPixel32 >> 0) & 0xFF) >> 3) << 11) | // R
((((*inPixel32 >> 8) & 0xFF) >> 3) << 6) | // G
((((*inPixel32 >> 16) & 0xFF) >> 3) << 1) | // B
((((*inPixel32 >> 24) & 0xFF) >> 7) << 0); // A


free(data);
data = tempData;
}
self = [self initWithData:data pixelFormat:pixelFormat pixelsWide:width pixelsHigh:height contentSize:imageSize];

// should be after calling super init
_hasPremultipliedAlpha = (info == kCGImageAlphaPremultipliedLast || info == kCGImageAlphaPremultipliedFirst);

CGContextRelease(context);
free(data);

return self;
}

@end

@implementation CCTexture2D (Text)

- (id) initWithString:(NSString*)string fontName:(NSString*)name fontSize:(CGFloat)size
{
    CGSize dim;
#if CC_FONT_LABEL_SUPPORT
    ZFont *zFont = [[FontManager sharedManager] zFontWithName:name pointSize:size];
    if (zFont != nil)
        dim = [string sizeWithZFont:zFont];
    else
#endif
        dim = [string sizeWithFont:[UIFont fontWithName:name size:size]];
    
return [self initWithString:string dimensions:dim alignment:UITextAlignmentCenter fontName:name fontSize:size];
}

- (id) initWithString:(NSString*)string dimensions:(CGSize)dimensions alignment:(UITextAlignment)alignment fontName:(NSString*)name fontSize:(CGFloat)size
{
NSUInteger width,
height,
i;
CGContextRef context;
void* data;
CGColorSpaceRef colorSpace;
id uiFont;
    
width = dimensions.width;
if((width != 1) && (width & (width - 1))) {
i = 1;
while(i < width)
i *= 2;
width = i;
}
height = dimensions.height;
if((height != 1) && (height & (height - 1))) {
i = 1;
while(i < height)
i *= 2;
height = i;
}

colorSpace = CGColorSpaceCreateDeviceGray();
data = calloc(height, width);
context = CGBitmapContextCreate(data, width, height, 8, width, colorSpace, kCGImageAlphaNone);
CGColorSpaceRelease(colorSpace);


CGContextSetGrayFillColor(context, 1.0f, 1.0f);
CGContextTranslateCTM(context, 0.0f, height);
CGContextScaleCTM(context, 1.0f, -1.0f); //NOTE: NSString draws in UIKit referential i.e. renders upside-down compared to CGBitmapContext referential
UIGraphicsPushContext(context);

#if CC_FONT_LABEL_SUPPORT
uiFont = [[FontManager sharedManager] zFontWithName:name pointSize:size];
    if (uiFont != nil)
        [string drawInRect:CGRectMake(0, 0, dimensions.width, dimensions.height) withZFont:uiFont lineBreakMode:UILineBreakModeWordWrap alignment:alignment];
    else
#endif // CC_FONT_LABEL_SUPPORT
{
        uiFont = [UIFont fontWithName:name size:size];
        [string drawInRect:CGRectMake(0, 0, dimensions.width, dimensions.height) withFont:uiFont lineBreakMode:UILineBreakModeWordWrap alignment:alignment];
    }
if( ! uiFont )
CCLOG(@"cocos2d: Texture2D: Font '%@' not found", name);
UIGraphicsPopContext();

self = [self initWithData:data pixelFormat:kTexture2DPixelFormat_A8 pixelsWide:width pixelsHigh:height contentSize:dimensions];

CGContextRelease(context);
free(data);

return self;
}

@end

@implementation CCTexture2D (Drawing)

- (void) drawAtPoint:(CGPoint)point
{
GLfloat coordinates[] = { 0.0f, _maxT,
_maxS, _maxT,
0.0f, 0.0f,
_maxS, 0.0f };
GLfloat width = (GLfloat)_width * _maxS,
height = (GLfloat)_height * _maxT;

#if 0
GLfloat vertices[] = { -width / 2 + point.x, -height / 2 + point.y, 0.0f,
width / 2 + point.x, -height / 2 + point.y, 0.0f,
-width / 2 + point.x, height / 2 + point.y, 0.0f,
width / 2 + point.x, height / 2 + point.y, 0.0f };
#else // anchor is done by cocos2d automagically
GLfloat vertices[] = { point.x, point.y, 0.0f,
width + point.x, point.y, 0.0f,
point.x, height + point.y, 0.0f,
width + point.x, height + point.y, 0.0f };
#endif

glBindTexture(GL_TEXTURE_2D, _name);
glVertexPointer(3, GL_FLOAT, 0, vertices);
glTexCoordPointer(2, GL_FLOAT, 0, coordinates);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
}


- (void) drawInRect:(CGRect)rect
{
GLfloat coordinates[] = { 0.0f, _maxT,
_maxS, _maxT,
0.0f, 0.0f,
_maxS, 0.0f };
GLfloat vertices[] = { rect.origin.x, rect.origin.y, /*0.0f,*/
rect.origin.x + rect.size.width, rect.origin.y, /*0.0f,*/
rect.origin.x, rect.origin.y + rect.size.height, /*0.0f,*/
rect.origin.x + rect.size.width, rect.origin.y + rect.size.height, /*0.0f*/ };

glBindTexture(GL_TEXTURE_2D, _name);
glVertexPointer(2, GL_FLOAT, 0, vertices);
glTexCoordPointer(2, GL_FLOAT, 0, coordinates);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
}

@end

@implementation CCTexture2D (PVRTC)
-(id) initWithPVRTCData: (const void*)data level:(int)level bpp:(int)bpp hasAlpha:(BOOL)hasAlpha length:(int)length
{
// GLint saveName;

if( ! [[CCConfiguration sharedConfiguration] supportsPVRTC] ) {
CCLOG(@"cocos2d: WARNING: PVRTC images is not supported");
return nil;
}

if((self = [super init])) {
glGenTextures(1, &_name);
// glGetIntegerv(GL_TEXTURE_BINDING_2D, &saveName);
glBindTexture(GL_TEXTURE_2D, _name);

[self setAntiAliasTexParameters];

GLenum format;
GLsizei size = length * length * bpp / 8;
if(hasAlpha) {
format = (bpp == 4) ? GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG : GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG;
} else {
format = (bpp == 4) ? GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG : GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG;
}
if(size < 32) {
size = 32;
}
glCompressedTexImage2D(GL_TEXTURE_2D, level, format, length, length, 0, size, data);

// glBindTexture(GL_TEXTURE_2D, saveName);

_size = CGSizeMake(length, length);
_width = length;
_height = length;
_maxS = 1.0f;
_maxT = 1.0f;
}
return self;
}

-(id) initWithPVRTCFile: (NSString*) file
{
if( ! [[CCConfiguration sharedConfiguration] supportsPVRTC] ) {
CCLOG(@"cocos2d: WARNING: PVRTC images is not supported");
return nil;
}

if( (self = [super init]) ) {
CCPVRTexture *pvr = [[CCPVRTexture alloc] initWithContentsOfFile:file];
pvr.retainName = YES; // don't dealloc texture on release

_name = pvr.name; // texture id
_maxS = 1.0f;
_maxT = 1.0f;
_width = pvr.width; // width
_height = pvr.height; // height
_size = CGSizeMake(_width, _height);

[pvr release];

[self setAntiAliasTexParameters];
}
return self;
}
@end

//
// Use to apply MIN/MAG filter
//
@implementation CCTexture2D (GLFilter)

-(void) generateMipmap
{
glBindTexture( GL_TEXTURE_2D, self.name );
glGenerateMipmapOES(GL_TEXTURE_2D);
}

-(void) setTexParameters: (ccTexParams*) texParams
{
glBindTexture( GL_TEXTURE_2D, self.name );
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, texParams->minFilter );
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, texParams->magFilter );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, texParams->wrapS );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, texParams->wrapT );
}

-(void) setAliasTexParameters
{
ccTexParams texParams = { GL_NEAREST, GL_NEAREST, GL_CLAMP_TO_EDGE, GL_CLAMP_TO_EDGE };
[self setTexParameters: &texParams];
}

-(void) setAntiAliasTexParameters
{
ccTexParams texParams = { GL_LINEAR, GL_LINEAR, GL_CLAMP_TO_EDGE, GL_CLAMP_TO_EDGE };
[self setTexParameters: &texParams];
}
@end

//
// Texture options for images that contains alpha
//
@implementation CCTexture2D (PixelFormat)
+(void) setDefaultAlphaPixelFormat:(Texture2DPixelFormat)format
{
defaultAlphaPixelFormat = format;
}

+(Texture2DPixelFormat) defaultAlphaPixelFormat
{
return defaultAlphaPixelFormat;
}
@end
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