"

 COPYRIGHT (c) 1995 by Claus Gittinger

              All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

"{ Package: 'stx:libview' }"

Image subclass:#Depth32Image

	instanceVariableNames:''

	classVariableNames:''

	poolDictionaries:''

	category:'Graphics-Images'

!

!Depth32Image class methodsFor:'documentation'!

copyright

"

 COPYRIGHT (c) 1995 by Claus Gittinger

              All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

!

documentation

"

    this class represents 32 bit images.

    Only the minimum protocol is implemented here; much more is

    needed for higher performance operations on depth32 images.

    (however, 32bit images are very seldom used, so falling back into the

    slow general methods from Image should not hurt too much ..)

    [author:]

        Claus Gittinger

    [see also:]

        Depth1Image Depth2Image Depth4Image Depth8Image Depth16Image Depth24Image

        ImageReader

"

! !

!Depth32Image class methodsFor:'queries'!

defaultPhotometric

    "return the default photometric pixel interpretation"

    ^ #rgb

    "Created: / 27-05-2007 / 14:03:59 / cg"

!

imageDepth

    "return the depth of images represented by instances of

     this class - here we return 32"

    ^ 32

    "Modified: 20.4.1996 / 23:40:01 / cg"

    "Created: 24.4.1997 / 19:00:28 / cg"

! !

!Depth32Image methodsFor:'accessing-pixels'!

pixelAtX:x y:y

    "retrieve a pixel at x/y; return a pixelValue.

     Pixels start at x=0 , y=0 for upper left pixel, end at

     x = width-1, y=height-1 for lower right pixel"

    |pixelIndex "{ Class: SmallInteger }"|

    pixelIndex := (width * 4 * y) + 1 + (x * 4).

    "left pixel in high bits"

    ^ bytes doubleWordAt:pixelIndex MSB:true.

    "Created: 24.4.1997 / 19:00:28 / cg"

    "Modified: 24.4.1997 / 23:11:05 / cg"

!

pixelAtX:x y:y put:aPixelValue

    "set the pixel at x/y to aPixelValue.

     Pixels start at x=0 , y=0 for upper left pixel, end at

     x = width-1, y=height-1 for lower right pixel"

    |pixelIndex "{ Class: SmallInteger }"|

    pixelIndex := (width * 4 * y) + 1 + (x * 4).

    bytes doubleWordAt:pixelIndex put:aPixelValue MSB:true

    "Created: 24.4.1997 / 19:00:28 / cg"

    "Modified: 24.4.1997 / 23:10:51 / cg"

! !

!Depth32Image methodsFor:'converting rgb images'!

rgbImageAsTrueColorFormOn:aDevice

    "return a truecolor form from the rgb-picture."

    |bytes bestFormat usedDeviceDepth usedDeviceBitsPerPixel usedDevicePadding

     myDepth form imageBits padd

     rightShiftR rightShiftG rightShiftB shiftRed shiftGreen shiftBlue|

    bytes := self bits.

    bestFormat := self bestSupportedImageFormatFor:aDevice.

    usedDeviceDepth := bestFormat at:#depth.

    usedDeviceBitsPerPixel := bestFormat at:#bitsPerPixel.

    usedDevicePadding := bestFormat at:#padding.

    rightShiftR := (8 - aDevice bitsRed).

    rightShiftG := (8 - aDevice bitsGreen).

    rightShiftB := (8 - aDevice bitsBlue).

    shiftRed := aDevice shiftRed.

    shiftGreen := aDevice shiftGreen.

    shiftBlue := aDevice shiftBlue.

    "/

    "/ for now, only a few formats are supported

    "/

    myDepth := self bitsPerPixel.

    usedDeviceBitsPerPixel == 24 ifTrue:[

        "/

        "/ 24 bit/pixel

        "/

        imageBits := ByteArray uninitializedNew:(width * height * 3).

        usedDevicePadding := 8.

        "/ now, walk over the image and compose 24bit values from the r/g/b/a triples

%{

        unsigned char *srcPtr = 0;

        unsigned char *dstPtr = 0;

        if (__isByteArray(bytes)) {

            srcPtr = _ByteArrayInstPtr(bytes)->ba_element;

        } else {

            if (__isExternalBytesLike(bytes)) {

                srcPtr = __externalBytesAddress(bytes);

            }

        }

        if (__isByteArray(imageBits)) {

            dstPtr = _ByteArrayInstPtr(imageBits)->ba_element;

        } else {

            if (__isExternalBytesLike(imageBits)) {

                dstPtr = __externalBytesAddress(imageBits);

            }

        }

        if (__bothSmallInteger(_INST(height), _INST(width))

         && __bothSmallInteger(rightShiftR, shiftRed)

         && __bothSmallInteger(rightShiftG, shiftGreen)

         && __bothSmallInteger(rightShiftB, shiftBlue)

         && srcPtr

         && dstPtr) {

            int rShRed = __intVal(rightShiftR),

                rShGreen = __intVal(rightShiftG),

                rShBlue = __intVal(rightShiftB),

                lShRed = __intVal(shiftRed),

                lShGreen = __intVal(shiftGreen),

                lShBlue = __intVal(shiftBlue);

            int x, y, w;

            w = __intVal(_INST(width));

            if ((rShRed == 0) && (rShGreen == 0) && (rShBlue == 0)) {

                if ((lShRed == 0) && (lShGreen == 8) && (lShBlue == 16)) {

                    for (y=__intVal(_INST(height)); y > 0; y--) {

                        for (x=w; x > 0; x--) {

# ifdef __MSBFIRST

                            dstPtr[0] = srcPtr[2];

                            dstPtr[1] = srcPtr[1];

                            dstPtr[2] = srcPtr[0];

# else /* not MSB */

                            dstPtr[0] = srcPtr[0];

                            dstPtr[1] = srcPtr[1];

                            dstPtr[2] = srcPtr[2];

# endif /* not MSB */

                            dstPtr += 3;

                            srcPtr += 4;

                        }

                    }

                } else {

                    for (y=__intVal(_INST(height)); y > 0; y--) {

                        for (x=w; x > 0; x--) {

                            unsigned v;

                            v = srcPtr[0] << lShRed;

                            v |= (srcPtr[1] << lShGreen);

                            v |= (srcPtr[2] << lShBlue);

# ifdef __MSBFIRST

                            dstPtr[0] = (v) & 0xFF;

                            dstPtr[1] = (v>>8) & 0xFF;

                            dstPtr[2] = (v>>16) & 0xFF;

# else /* not MSB */

                            dstPtr[0] = (v>>16) & 0xFF;

                            dstPtr[1] = (v>>8) & 0xFF;

                            dstPtr[2] = (v) & 0xFF;

# endif /* not MSB */

                            dstPtr += 3;

                            srcPtr += 4;

                        }

                    }

                }

            } else {

                for (y=__intVal(_INST(height)); y > 0; y--) {

                    for (x=w; x > 0; x--) {

                        unsigned r, g, b, v;

                        r = srcPtr[0] >> rShRed;

                        g = srcPtr[1] >> rShGreen;

                        b = srcPtr[2] >> rShBlue;

                        v = r << lShRed;

                        v |= (g << lShGreen);

                        v |= (b << lShBlue);

# ifdef __MSBFIRST

                        dstPtr[0] = (v) & 0xFF;

                        dstPtr[1] = (v>>8) & 0xFF;

                        dstPtr[2] = (v>>16) & 0xFF;

# else /* not MSB */

                        dstPtr[0] = (v>>16) & 0xFF;

                        dstPtr[1] = (v>>8) & 0xFF;

                        dstPtr[2] = (v) & 0xFF;

# endif /* not MSB */

                        dstPtr += 3;

                        srcPtr += 4;

                    }

                }

            }

        }

%}.

    ] ifFalse:[

        "/

        "/ 16 bit/pixel ...

        "/

        (usedDeviceBitsPerPixel == 16) ifTrue:[

            padd := width \\ (usedDevicePadding // 16).

            imageBits := ByteArray uninitializedNew:((width + padd) * height * 2).

            "/ now, walk over the image and compose 16bit values from the r/g/b triples

%{

            unsigned char *srcPtr = 0;

            unsigned char *dstPtr = 0;

            if (__isByteArray(bytes)) {

                srcPtr = _ByteArrayInstPtr(bytes)->ba_element;

            } else {

                if (__isExternalBytesLike(bytes)) {

                    srcPtr = __externalBytesAddress(bytes);

                }

            }

            if (__isByteArray(imageBits)) {

                dstPtr = _ByteArrayInstPtr(imageBits)->ba_element;

            } else {

                if (__isExternalBytesLike(imageBits)) {

                    dstPtr = __externalBytesAddress(imageBits);

                }

            }

            if (__bothSmallInteger(_INST(height),_INST(width))

             && __bothSmallInteger(rightShiftR, shiftRed)

             && __bothSmallInteger(rightShiftG, shiftGreen)

             && __bothSmallInteger(rightShiftB, shiftBlue)

             && srcPtr

             && dstPtr) {

                int rShRed = __intVal(rightShiftR),

                    rShGreen = __intVal(rightShiftG),

                    rShBlue = __intVal(rightShiftB),

                    lShRed = __intVal(shiftRed),

                    lShGreen = __intVal(shiftGreen),

                    lShBlue = __intVal(shiftBlue);

                int x, y, w;

                int p;

                w = __intVal(_INST(width));

                p = __intVal(padd) * 2;

                if ((rShRed == 0) && (rShGreen == 0) && (rShBlue == 0)) {

                    for (y=__intVal(_INST(height)); y > 0; y--) {

                        for (x=w; x > 0; x--) {

                            unsigned v;

                            v = srcPtr[0] << lShRed;

                            v |= (srcPtr[1] << lShGreen);

                            v |= (srcPtr[2] << lShBlue);

# ifdef __MSBFIRST

                            ((short *)dstPtr)[0] = v;

# else /* not MSB */

                            dstPtr[0] = (v>>8) & 0xFF;

                            dstPtr[1] = (v) & 0xFF;

# endif /* not MSB */

                            dstPtr += 2;

                            srcPtr += 4;

                        }

                        dstPtr += p;

                    }

                } else {

                    if (p == 0) {

                        int n = __intVal(__INST(height)) * w;

                        while (n >= 2) {

                            unsigned w, r, g, b, v;

                            n -= 2;

                            r = srcPtr[0];

                            g = srcPtr[1];

                            b = srcPtr[2];

                            v = (r >> rShRed) << lShRed;

                            v |= ((g >> rShGreen) << lShGreen);

                            v |= ((b >> rShBlue) << lShBlue);

# ifdef __MSBFIRST

                            ((short *)dstPtr)[0] = v;

# else

                            dstPtr[0] = (v>>8) & 0xFF;

                            dstPtr[1] = (v) & 0xFF;

# endif /* not MSB */

                            r = srcPtr[3];

                            g = srcPtr[4];

                            b = srcPtr[5];

                            v = (r >> rShRed) << lShRed;

                            v |= ((g >> rShGreen) << lShGreen);

                            v |= ((b >> rShBlue) << lShBlue);

# ifdef __MSBFIRST

                            ((short *)dstPtr)[1] = v;

# else

                            dstPtr[2] = (v>>8) & 0xFF;

                            dstPtr[3] = (v) & 0xFF;

# endif /* not MSB */

                            dstPtr += 4;

                            srcPtr += 8;

                        }

                        while (n--) {

                            unsigned r, g, b, v;

                            r = srcPtr[0] >> rShRed;

                            g = srcPtr[1] >> rShGreen;

                            b = srcPtr[2] >> rShBlue;

                            v = r << lShRed;

                            v |= (g << lShGreen);

                            v |= (b << lShBlue);

# ifdef __MSBFIRST

                            ((short *)dstPtr)[0] = v;

# else /* not MSB */

                            dstPtr[0] = (v>>8) & 0xFF;

                            dstPtr[1] = (v) & 0xFF;

# endif /* not MSB */

                            dstPtr += 2;

                            srcPtr += 4;

                        }

                    } else {

                        for (y=__intVal(_INST(height)); y > 0; y--) {

                            for (x=w; x > 0; x--) {

                                unsigned r, g, b, v;

                                r = srcPtr[0] >> rShRed;

                                g = srcPtr[1] >> rShGreen;

                                b = srcPtr[2] >> rShBlue;

                                v = r << lShRed;

                                v |= (g << lShGreen);

                                v |= (b << lShBlue);

# ifdef __MSBFIRST

                                ((short *)dstPtr)[0] = v;

# else /* not MSB */

                                dstPtr[0] = (v>>8) & 0xFF;

                                dstPtr[1] = (v) & 0xFF;

# endif /* not MSB */

                                dstPtr += 2;

                                srcPtr += 4;

                            }

                            dstPtr += p;

                        }

                    }

                }

            }

%}.

        ] ifFalse:[

            "/

            "/ 32 bits/pixel ...

            "/

            (usedDeviceBitsPerPixel == 32) ifTrue:[

                usedDevicePadding := 8.

                imageBits := ByteArray uninitializedNew:(width * height * 4).

                "/ now, walk over the image and compose 32bit values from the r/g/b triples

%{

                unsigned char *srcPtr = 0;

                unsigned char *dstPtr = 0;

                if (__isByteArray(bytes)) {

                    srcPtr = _ByteArrayInstPtr(bytes)->ba_element;

                } else {

                    if (__isExternalBytesLike(bytes)) {

                        srcPtr = __externalBytesAddress(bytes);

                    }

                }

                if (__isByteArray(imageBits)) {

                    dstPtr = _ByteArrayInstPtr(imageBits)->ba_element;

                } else {

                    if (__isExternalBytesLike(imageBits)) {

                        dstPtr = __externalBytesAddress(imageBits);

                    }

                }

                if (__bothSmallInteger(_INST(height), _INST(width))

                 && __bothSmallInteger(rightShiftR, shiftRed)

                 && __bothSmallInteger(rightShiftG, shiftGreen)

                 && __bothSmallInteger(rightShiftB, shiftBlue)

                 && srcPtr

                 && dstPtr) {

                    int rShRed = __intVal(rightShiftR),

                        rShGreen = __intVal(rightShiftG),

                        rShBlue = __intVal(rightShiftB),

                        lShRed = __intVal(shiftRed),

                        lShGreen = __intVal(shiftGreen),

                        lShBlue = __intVal(shiftBlue);

                    int x, y, w;

                    w = __intVal(_INST(width));

                    if ((rShRed == 0) && (rShGreen == 0) && (rShBlue == 0)) {

                        for (y=__intVal(_INST(height)); y > 0; y--) {

                            for (x=w; x > 0; x--) {

                                unsigned v;

                                v = srcPtr[0] << lShRed;

                                v |= (srcPtr[1] << lShGreen);

                                v |= (srcPtr[2] << lShBlue);

# ifdef __MSBFIRST

                                ((int *)dstPtr)[0] = v;

# else /* not MSB */

                                dstPtr[0] = (v>>24) & 0xFF;

                                dstPtr[1] = (v>>16) & 0xFF;

                                dstPtr[2] = (v>>8) & 0xFF;

                                dstPtr[3] = (v) & 0xFF;

# endif /* not MSB */

                                dstPtr += 4;

                                srcPtr += 4;

                            }

                        }

                    } else {

                        for (y=__intVal(_INST(height)); y > 0; y--) {

                            for (x=w; x > 0; x--) {

                                unsigned r, g, b, v;

                                r = srcPtr[0] >> rShRed;

                                g = srcPtr[1] >> rShGreen;

                                b = srcPtr[2] >> rShBlue;

                                v = r << lShRed;

                                v |= (g << lShGreen);

                                v |= (b << lShBlue);

# ifdef __MSBFIRST

                                ((int *)dstPtr)[0] = v;

# else /* not MSB */

                                dstPtr[0] = (v>>24) & 0xFF;

                                dstPtr[1] = (v>>16) & 0xFF;

                                dstPtr[2] = (v>>8) & 0xFF;

                                dstPtr[3] = (v) & 0xFF;

# endif /* not MSB */

                                dstPtr += 4;

                                srcPtr += 4;

                            }

                        }

                    }

                }

%}.

            ] ifFalse:[

                "/

                "/ 8 bits/pixel ...

                "/

                (usedDeviceBitsPerPixel == 8) ifTrue:[

                    usedDevicePadding := 8.

                    imageBits := ByteArray uninitializedNew:(width * height).

                    "/ now, walk over the image and compose 8bit values from the r/g/b triples

%{

                    unsigned char *srcPtr = 0;

                    unsigned char *dstPtr = 0;

                    if (__isByteArray(bytes)) {

                        srcPtr = _ByteArrayInstPtr(bytes)->ba_element;

                    } else {

                        if (__isExternalBytesLike(bytes)) {

                            srcPtr = __externalBytesAddress(bytes);