/*

 *  GLString.m

 *  Created November 3 2004.

 *  Copyright (c) 2004 Apple Computer Inc. All rights reserved.

    Disclaimer: IMPORTANT:  This Apple software is supplied to you by Apple Computer, Inc.

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            expressly stated in this notice, no other rights or licenses, express or implied,

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            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

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 *

 */

#import "GLString.h"

@implementation GLString

// Accessors

-(GLuint)texID                      { return texID; }

-(NSSize)texSize                    { return texSize; }

-(NSColor*)textColor                { return textColor; }

-(NSColor*)boxColor                 { return boxColor; }

-(NSColor*)borderColor              { return borderColor; }

-(NSSize)marginSize                 { return marginSize; }

-(BOOL)staticFrame                  { return staticFrame; }

// =======================================================

-(id)init

{

    self = [super init];

    cgl_ctx = NULL;

    texID = 0;

    texSize.width = 0.0f;

    texSize.height = 0.0f;

    str = [[[NSMutableAttributedString alloc] init] retain];

    textColor = [[NSColor colorWithDeviceRed:1.0 green:1.0 blue:1.0 alpha:0.75] retain];

    boxColor = [[NSColor colorWithDeviceRed:0.667 green:0.75 blue:0.667 alpha:0.75] retain];

    borderColor  = [[NSColor colorWithDeviceRed:1.0 green:1.0 blue:1.0 alpha:0.75] retain];

    attribs = [[NSMutableDictionary dictionary] retain];

    theFont = [[NSFont fontWithName:@"Helvetica" size:12] retain];

    staticFrame = NO;

    marginSize.width = 4.0f; // standard margins

    marginSize.height = 2.0f;

    [self initTextAttributes];

    return self;

}

-(void)initTextAttributes

{

    [attribs setObject:theFont forKey:NSFontAttributeName];

    [attribs setObject:textColor forKey:NSForegroundColorAttributeName];

}

-(id)initWithString:(NSMutableString*)newString

{

    self = [self init];

    [[str mutableString] setString:newString];

    return self;

}

-(id)initWithAttributedString:(NSAttributedString*)newString

{

    [str setAttributedString:newString];

    [self genTexture];

    return self;

}

-(id)initWithString:(NSMutableString*)newString textColor:(NSColor*)txColor boxColor:(NSColor*)bxColor borderColor:(NSColor*)brColor

{

    // Release our old colors

    if(textColor)

        [textColor release];

    if(boxColor)

        [boxColor release];

    if(borderColor)

        [borderColor release];

    // Retain our new colors

    textColor = [txColor retain];

    boxColor = [bxColor retain];

    borderColor = [brColor retain];

    // Change our text color

    [attribs setObject:textColor forKey:NSForegroundColorAttributeName];

    [self initWithString:newString];

    return self;

}

-(void)dealloc

{

    [self deleteTexture];

    [textColor release];

    [boxColor release];

    [borderColor release];

    [str release];

    [theFont release];

    [attribs release];

    [super dealloc];

}

-(void)deleteTexture

{

    if (texID && cgl_ctx) {

        (*cgl_ctx->disp.delete_textures)(cgl_ctx->rend, 1, &texID);

        texID = 0;

        cgl_ctx = 0;

    }

}

-(void)setString:(NSMutableString*)newString

{

    [[str mutableString] setString:newString];

    // Make sure we update our texture

    [self genTexture];

}

-(void)setTextColor:(NSColor*)newColor

{

    if(textColor)

        [textColor release];

    textColor = [newColor retain];

}

-(void)setBorderColor:(NSColor*)newColor

{

    if(borderColor)

        [borderColor release];

    borderColor = [newColor retain];

}

-(void)setBoxColor:(NSColor*)newColor

{

    if(boxColor)

        [boxColor release];

    boxColor = [newColor retain];

}

-(NSSize)frameSize

{

    if ((NO == staticFrame) && (0.0f == frameSize.width) && (0.0f == frameSize.height)) { // find frame size if we have not already found it

        frameSize = [str size]; // current string size

        frameSize.width += marginSize.width * 2.0f; // add padding

        frameSize.height += marginSize.height * 2.0f;

    }

    return frameSize;

}

-(void)genTexture; // generates the texture without drawing texture to current context

{

    NSImage* image;

    [self deleteTexture];

    if ((NO == staticFrame) && (0.0f == frameSize.width) && (0.0f == frameSize.height)) { // find frame size if we have not already found it

        frameSize = [str size]; // current string size

        frameSize.width += marginSize.width * 2.0f; // add padding

        frameSize.height += marginSize.height * 2.0f;

    }

    image = [[NSImage alloc] initWithSize:frameSize];

    [image lockFocus];

    if ([boxColor alphaComponent]) { // this should be == 0.0f but need to make sure

        [boxColor set]; 

        NSRectFill (NSMakeRect (0.0f, 0.0f, frameSize.width, frameSize.height));

    }

    if ([borderColor alphaComponent]) {

        [borderColor set]; 

        NSFrameRect (NSMakeRect (0.0f, 0.0f, frameSize.width, frameSize.height));

    }

    [str setAttributes:attribs range:NSMakeRange(0, [str length])];

    [textColor set]; 

    [str drawAtPoint:NSMakePoint (marginSize.width, marginSize.height)]; // draw at offset position

    // Remove our old bitmap if it's present

    if(bmpRep)

        [bmpRep release];

    // Allocate the new bitmap image rep

    bmpRep = [[NSBitmapImageRep alloc] initWithFocusedViewRect:NSMakeRect (0.0f, 0.0f, frameSize.width, frameSize.height)];

    [image unlockFocus];

    texSize.width = [bmpRep size].width;

    texSize.height = [bmpRep size].height;

    if (cgl_ctx = CGLGetCurrentContext())

    { // if we successfully retrieve a current context (required)

        glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, 1);

        glPixelStorei(GL_UNPACK_ROW_LENGTH, texSize.width);

        glGenTextures (1, &texID);

        glBindTexture (GL_TEXTURE_RECTANGLE_EXT, texID);

        glTexImage2D (GL_TEXTURE_RECTANGLE_EXT, 0, GL_RGBA, texSize.width, texSize.height, 0, GL_RGBA, GL_UNSIGNED_BYTE, [bmpRep bitmapData]);

    }

    else

        NSLog (@"StringTexture -genTexture: Failure to get current OpenGL context\n");

    [image release];

}

-(void)drawWithBounds:(NSRect)bounds

{

    if (!texID)

        [self genTexture];

    if (texID) {

        glBindTexture (GL_TEXTURE_RECTANGLE_EXT, texID);

        glBegin (GL_QUADS);

            glTexCoord2f (0.0f, 0.0f); // draw upper left in world coordinates

            glVertex2f (bounds.origin.x, bounds.origin.y);

            glTexCoord2f (0.0f, texSize.height); // draw lower left in world coordinates

            glVertex2f (bounds.origin.x, bounds.origin.y + bounds.size.height);

            glTexCoord2f (texSize.width, texSize.height); // draw upper right in world coordinates

            glVertex2f (bounds.origin.x + bounds.size.width, bounds.origin.y + bounds.size.height);

            glTexCoord2f (texSize.width, 0.0f); // draw lower right in world coordinates

            glVertex2f (bounds.origin.x + bounds.size.width, bounds.origin.y);

        glEnd ();

    }

}

-(void)drawAtPoint:(NSPoint)point

{

    if (!texID)

        [self genTexture]; // ensure size is calculated for bounds

    if (texID) // if successful

        [self drawWithBounds:NSMakeRect (point.x, point.y, texSize.width, texSize.height)];

}

// these will force the texture to be regenerated at the next draw

- (void) setMargins:(NSSize)size // set offset size and size to fit with offset

{

    [self deleteTexture];

    marginSize = size;

    if (NO == staticFrame) { // ensure dynamic frame sizes will be recalculated

        frameSize.width = 0.0f;

        frameSize.height = 0.0f;

    }

}

- (void) useStaticFrame:(NSSize)size // set static frame size and size to frame

{

    [self deleteTexture];

    frameSize = size;

    staticFrame = YES;

}

- (void) useDynamicFrame

{

    if (staticFrame) { // set to dynamic frame and set to regen texture

        [self deleteTexture];

        staticFrame = NO;

        frameSize.width = 0.0f; // ensure frame sizes will be recalculated

        frameSize.height = 0.0f;

    }

}

@end