{
 *  CVOpenGLTexture.h
 *  CoreVideo
 *
 *  Copyright (c) 2004 Apple Computer, Inc. All rights reserved.
 *
 }
{	 Pascal Translation:  Gorazd Krosl, <gorazd_1957@yahoo.ca>, 2009 }

{
    Modified for use with Free Pascal
    Version 308
    Please report any bugs to <gpc@microbizz.nl>
}

{$ifc not defined MACOSALLINCLUDE or not MACOSALLINCLUDE}
{$mode macpas}
{$packenum 1}
{$macro on}
{$inline on}
{$calling mwpascal}

unit CVOpenGLTexture;
interface
{$setc UNIVERSAL_INTERFACES_VERSION := $0400}
{$setc GAP_INTERFACES_VERSION := $0308}

{$ifc not defined USE_CFSTR_CONSTANT_MACROS}
    {$setc USE_CFSTR_CONSTANT_MACROS := TRUE}
{$endc}

{$ifc defined CPUPOWERPC and defined CPUI386}
	{$error Conflicting initial definitions for CPUPOWERPC and CPUI386}
{$endc}
{$ifc defined FPC_BIG_ENDIAN and defined FPC_LITTLE_ENDIAN}
	{$error Conflicting initial definitions for FPC_BIG_ENDIAN and FPC_LITTLE_ENDIAN}
{$endc}

{$ifc not defined __ppc__ and defined CPUPOWERPC32}
	{$setc __ppc__ := 1}
{$elsec}
	{$setc __ppc__ := 0}
{$endc}
{$ifc not defined __ppc64__ and defined CPUPOWERPC64}
	{$setc __ppc64__ := 1}
{$elsec}
	{$setc __ppc64__ := 0}
{$endc}
{$ifc not defined __i386__ and defined CPUI386}
	{$setc __i386__ := 1}
{$elsec}
	{$setc __i386__ := 0}
{$endc}
{$ifc not defined __x86_64__ and defined CPUX86_64}
	{$setc __x86_64__ := 1}
{$elsec}
	{$setc __x86_64__ := 0}
{$endc}
{$ifc not defined __arm__ and defined CPUARM}
	{$setc __arm__ := 1}
{$elsec}
	{$setc __arm__ := 0}
{$endc}

{$ifc defined cpu64}
  {$setc __LP64__ := 1}
{$elsec}
  {$setc __LP64__ := 0}
{$endc}


{$ifc defined __ppc__ and __ppc__ and defined __i386__ and __i386__}
	{$error Conflicting definitions for __ppc__ and __i386__}
{$endc}

{$ifc defined __ppc__ and __ppc__}
	{$setc TARGET_CPU_PPC := TRUE}
	{$setc TARGET_CPU_PPC64 := FALSE}
	{$setc TARGET_CPU_X86 := FALSE}
	{$setc TARGET_CPU_X86_64 := FALSE}
	{$setc TARGET_CPU_ARM := FALSE}
	{$setc TARGET_OS_MAC := TRUE}
	{$setc TARGET_OS_IPHONE := FALSE}
	{$setc TARGET_IPHONE_SIMULATOR := FALSE}
{$elifc defined __ppc64__ and __ppc64__}
	{$setc TARGET_CPU_PPC := FALSE}
	{$setc TARGET_CPU_PPC64 := TRUE}
	{$setc TARGET_CPU_X86 := FALSE}
	{$setc TARGET_CPU_X86_64 := FALSE}
	{$setc TARGET_CPU_ARM := FALSE}
	{$setc TARGET_OS_MAC := TRUE}
	{$setc TARGET_OS_IPHONE := FALSE}
	{$setc TARGET_IPHONE_SIMULATOR := FALSE}
{$elifc defined __i386__ and __i386__}
	{$setc TARGET_CPU_PPC := FALSE}
	{$setc TARGET_CPU_PPC64 := FALSE}
	{$setc TARGET_CPU_X86 := TRUE}
	{$setc TARGET_CPU_X86_64 := FALSE}
	{$setc TARGET_CPU_ARM := FALSE}
{$ifc defined(iphonesim)}
 	{$setc TARGET_OS_MAC := FALSE}
	{$setc TARGET_OS_IPHONE := TRUE}
	{$setc TARGET_IPHONE_SIMULATOR := TRUE}
{$elsec}
	{$setc TARGET_OS_MAC := TRUE}
	{$setc TARGET_OS_IPHONE := FALSE}
	{$setc TARGET_IPHONE_SIMULATOR := FALSE}
{$endc}
{$elifc defined __x86_64__ and __x86_64__}
	{$setc TARGET_CPU_PPC := FALSE}
	{$setc TARGET_CPU_PPC64 := FALSE}
	{$setc TARGET_CPU_X86 := FALSE}
	{$setc TARGET_CPU_X86_64 := TRUE}
	{$setc TARGET_CPU_ARM := FALSE}
	{$setc TARGET_OS_MAC := TRUE}
	{$setc TARGET_OS_IPHONE := FALSE}
	{$setc TARGET_IPHONE_SIMULATOR := FALSE}
{$elifc defined __arm__ and __arm__}
	{$setc TARGET_CPU_PPC := FALSE}
	{$setc TARGET_CPU_PPC64 := FALSE}
	{$setc TARGET_CPU_X86 := FALSE}
	{$setc TARGET_CPU_X86_64 := FALSE}
	{$setc TARGET_CPU_ARM := TRUE}
	{ will require compiler define when/if other Apple devices with ARM cpus ship }
	{$setc TARGET_OS_MAC := FALSE}
	{$setc TARGET_OS_IPHONE := TRUE}
	{$setc TARGET_IPHONE_SIMULATOR := FALSE}
{$elsec}
	{$error __ppc__ nor __ppc64__ nor __i386__ nor __x86_64__ nor __arm__ is defined.}
{$endc}

{$ifc defined __LP64__ and __LP64__ }
  {$setc TARGET_CPU_64 := TRUE}
{$elsec}
  {$setc TARGET_CPU_64 := FALSE}
{$endc}

{$ifc defined FPC_BIG_ENDIAN}
	{$setc TARGET_RT_BIG_ENDIAN := TRUE}
	{$setc TARGET_RT_LITTLE_ENDIAN := FALSE}
{$elifc defined FPC_LITTLE_ENDIAN}
	{$setc TARGET_RT_BIG_ENDIAN := FALSE}
	{$setc TARGET_RT_LITTLE_ENDIAN := TRUE}
{$elsec}
	{$error Neither FPC_BIG_ENDIAN nor FPC_LITTLE_ENDIAN are defined.}
{$endc}
{$setc ACCESSOR_CALLS_ARE_FUNCTIONS := TRUE}
{$setc CALL_NOT_IN_CARBON := FALSE}
{$setc OLDROUTINENAMES := FALSE}
{$setc OPAQUE_TOOLBOX_STRUCTS := TRUE}
{$setc OPAQUE_UPP_TYPES := TRUE}
{$setc OTCARBONAPPLICATION := TRUE}
{$setc OTKERNEL := FALSE}
{$setc PM_USE_SESSION_APIS := TRUE}
{$setc TARGET_API_MAC_CARBON := TRUE}
{$setc TARGET_API_MAC_OS8 := FALSE}
{$setc TARGET_API_MAC_OSX := TRUE}
{$setc TARGET_CARBON := TRUE}
{$setc TARGET_CPU_68K := FALSE}
{$setc TARGET_CPU_MIPS := FALSE}
{$setc TARGET_CPU_SPARC := FALSE}
{$setc TARGET_OS_UNIX := FALSE}
{$setc TARGET_OS_WIN32 := FALSE}
{$setc TARGET_RT_MAC_68881 := FALSE}
{$setc TARGET_RT_MAC_CFM := FALSE}
{$setc TARGET_RT_MAC_MACHO := TRUE}
{$setc TYPED_FUNCTION_POINTERS := TRUE}
{$setc TYPE_BOOL := FALSE}
{$setc TYPE_EXTENDED := FALSE}
{$setc TYPE_LONGLONG := TRUE}
uses MacTypes,CFBase,CVBase,CVReturns,CVImageBuffer,CGLTypes,macgl;
{$endc} {not MACOSALLINCLUDE}


{$ifc TARGET_OS_MAC}

{$ALIGN POWER}

 {! @header CVOpenGLTexture.h
	@copyright 2004 Apple Computer, Inc. All rights reserved.
	@availability Mac OS X 10.4 or later
    @discussion A CoreVideo Texture derives from an ImageBuffer, and is used for supplying source image data to OpenGL.
    		   
}


//#pragma mark CVOpenGLTexture

{!
    @typedef	CVOpenGLTextureRef
    @abstract   OpenGL texture based image buffer

}
type
	CVOpenGLTextureRef = CVImageBufferRef;

function CVOpenGLTextureGetTypeID: CFTypeID; external name '_CVOpenGLTextureGetTypeID';
(* AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER *)

{!
    @function   CVOpenGLTextureRetain
    @abstract   Retains a CVOpenGLTexture object
    @discussion Equivalent to CFRetain, but NULL safe
    @param      buffer A CVOpenGLTexture object that you want to retain.
    @result     A CVOpenGLTexture object that is the same as the passed in buffer.
}
function CVOpenGLTextureRetain( texture: CVOpenGLTextureRef ): CVOpenGLTextureRef; external name '_CVOpenGLTextureRetain';
(* AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER *)

{!
    @function   CVOpenGLTextureRelease
    @abstract   Releases a CVOpenGLTexture object
    @discussion Equivalent to CFRelease, but NULL safe
    @param      buffer A CVOpenGLTexture object that you want to release.
}
procedure CVOpenGLTextureRelease( texture: CVOpenGLTextureRef ); external name '_CVOpenGLTextureRelease';
(* AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER *)

{!
    @function   CVOpenGLTextureGetTarget
    @abstract   Returns the texture target (eg. 2D vs. rect texture extension) of the CVOpenGLTexture
    @param      image Target CVOpenGLTexture
    @result     OpenGL texture target
}
function CVOpenGLTextureGetTarget( image: CVOpenGLTextureRef ): GLenum; external name '_CVOpenGLTextureGetTarget';
(* AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER *)

{!
    @function   CVOpenGLTextureGetName
    @abstract   Returns the texture target name of the CVOpenGLTexture
    @param      image Target CVOpenGLTexture
    @result     OpenGL texture target name
}
function CVOpenGLTextureGetName( image: CVOpenGLTextureRef ): GLuint; external name '_CVOpenGLTextureGetName';
(* AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER *)

{!
    @function   CVOpenGLTextureIsFlipped
    @abstract   Returns whether the image is flipped vertically or not.
    @param      image Target CVOpenGLTexture
    @result     True if 0,0 in the texture is upper left, false if 0,0 is lower left
}
function CVOpenGLTextureIsFlipped( image: CVOpenGLTextureRef ): Boolean; external name '_CVOpenGLTextureIsFlipped';
(* AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER *)

{!
    @function   CVOpenGLTextureGetCleanTexCoords 
    @abstract   Returns convenient texture coordinates for the part of the image that should be displayed
    @discussion This function automatically takes into account whether or not the texture is flipped.
    @param      image Target CVOpenGLTexture
    @param      lowerLeft  - array of two GLfloats where the s and t texture coordinates of the lower left corner of the image will be stored
    @param      lowerRight - array of two GLfloats where the s and t texture coordinates of the lower right corner of the image will be stored
    @param      upperRight - array of two GLfloats where the s and t texture coordinates of the upper right corner of the image will be stored
    @param      upperLeft  - array of two GLfloats where the s and t texture coordinates of the upper right corner of the image will be stored
}
type
	T2GLfloatArray = array[0..1] of GLfloat;
	T2GLfloatArrayPtr = ^T2GLfloatArray;
procedure CVOpenGLTextureGetCleanTexCoords( image: CVOpenGLTextureRef; lowerLeft : T2GLfloatArrayPtr; lowerRight : T2GLfloatArrayPtr; upperRight : T2GLfloatArrayPtr; upperLeft : T2GLfloatArrayPtr ); external name '_CVOpenGLTextureGetCleanTexCoords';
(* AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER *)

{$endc} // TARGET_OS_MAC
{$ifc not defined MACOSALLINCLUDE or not MACOSALLINCLUDE}

end.
{$endc} {not MACOSALLINCLUDE}