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BitBltPlugin.c
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BitBltPlugin.c
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/* Automatically generated by
SmartSyntaxPluginCodeGenerator VMMaker.oscog-eem.2420 uuid: f303796f-283f-4d4c-a910-bf205a0b4600
from
BitBltSimulation VMMaker.oscog-eem.2420 uuid: f303796f-283f-4d4c-a910-bf205a0b4600
*/
static char __buildInfo[] = "BitBltSimulation VMMaker.oscog-eem.2420 uuid: f303796f-283f-4d4c-a910-bf205a0b4600 " __DATE__ ;
#include "config.h"
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
/* Default EXPORT macro that does nothing (see comment in sq.h): */
#define EXPORT(returnType) returnType
/* Do not include the entire sq.h file but just those parts needed. */
#include "sqConfig.h" /* Configuration options */
#include "sqVirtualMachine.h" /* The virtual machine proxy definition */
#include "sqPlatformSpecific.h" /* Platform specific definitions */
#define true 1
#define false 0
#define null 0 /* using 'null' because nil is predefined in Think C */
#ifdef SQUEAK_BUILTIN_PLUGIN
# undef EXPORT
# define EXPORT(returnType) static returnType
#endif
#include "sqAssert.h"
#ifdef ENABLE_FAST_BLT
#include "BitBltDispatch.h"
#else
// to handle the unavoidable decl in the spec of copyBitsFallback();
#define operation_t void
#endif
#include "sqMemoryAccess.h"
/*** Constants ***/
#define AllOnes 0xFFFFFFFFU
#define AlphaIndex 3
#define BBClipHeightIndex 13
#define BBClipWidthIndex 12
#define BBClipXIndex 10
#define BBClipYIndex 11
#define BBColorMapIndex 14
#define BBDestFormIndex 0
#define BBDestXIndex 4
#define BBDestYIndex 5
#define BBHalftoneFormIndex 2
#define BBHeightIndex 7
#define BBRuleIndex 3
#define BBSourceFormIndex 1
#define BBSourceXIndex 8
#define BBSourceYIndex 9
#define BBWarpBase 15
#define BBWidthIndex 6
#define BEBitBltIndex 2
#define BinaryPoint 14
#define BlueIndex 2
#define ColorMapFixedPart 2
#define ColorMapIndexedPart 4
#define ColorMapNewStyle 8
#define ColorMapPresent 1
#define FixedPt1 0x4000
#define FormBitsIndex 0
#define FormDepthIndex 3
#define FormHeightIndex 2
#define FormWidthIndex 1
#define GreenIndex 1
#define OpTableSize 43
#define PrimErrCallbackError 20
#define PrimErrObjectMoved 18
#define RedIndex 0
/*** Function Prototypes ***/
static unsigned int addWordwith(unsigned int sourceWord, unsigned int destinationWord);
static sqInt affectedBottom(void);
static sqInt affectedLeft(void);
static sqInt affectedRight(void);
static sqInt affectedTop(void);
static unsigned int alphaBlendConstwith(unsigned int sourceWord, unsigned int destinationWord);
static unsigned int alphaBlendConstwithpaintMode(unsigned int sourceWord, unsigned int destinationWord, sqInt paintMode);
static unsigned int alphaBlendScaledwith(unsigned int sourceWord, unsigned int destinationWord);
static unsigned int alphaBlendwith(unsigned int sourceWord, unsigned int destinationWord);
static unsigned int alphaPaintConstwith(unsigned int sourceWord, unsigned int destinationWord);
static sqInt alphaSourceBlendBits16(void);
static sqInt alphaSourceBlendBits32(void);
static sqInt alphaSourceBlendBits8(void);
static unsigned int bitAndInvertwith(unsigned int sourceWord, unsigned int destinationWord);
static unsigned int bitAndwith(unsigned int sourceWord, unsigned int destinationWord);
static unsigned int bitInvertAndInvertwith(unsigned int sourceWord, unsigned int destinationWord);
static unsigned int bitInvertAndwith(unsigned int sourceWord, unsigned int destinationWord);
static unsigned int bitInvertDestinationwith(unsigned int sourceWord, unsigned int destinationWord);
static unsigned int bitInvertOrInvertwith(unsigned int sourceWord, unsigned int destinationWord);
static unsigned int bitInvertOrwith(unsigned int sourceWord, unsigned int destinationWord);
static unsigned int bitInvertSourcewith(unsigned int sourceWord, unsigned int destinationWord);
static unsigned int bitInvertXorwith(unsigned int sourceWord, unsigned int destinationWord);
static unsigned int bitOrInvertwith(unsigned int sourceWord, unsigned int destinationWord);
static unsigned int bitOrwith(unsigned int sourceWord, unsigned int destinationWord);
static unsigned int bitXorwith(unsigned int sourceWord, unsigned int destinationWord);
static sqInt checkSourceOverlap(void);
static unsigned int clearWordwith(unsigned int sourceWord, unsigned int destinationWord);
static sqInt clipRange(void);
EXPORT(sqInt) copyBits(void);
static sqInt copyBitsFastPathSpecialised(void);
EXPORT(sqInt) copyBitsFromtoat(sqInt startX, sqInt stopX, sqInt yValue);
static sqInt copyBitsLockedAndClipped(void);
static sqInt copyBitsRule41Test(void);
extern void copyBitsFallback(operation_t *op, unsigned int flags);
static sqInt copyLoop(void);
static sqInt copyLoopNoSource(void);
static sqInt copyLoopPixMap(void);
static unsigned int * default8To32Table(void);
static sqInt deltaFromtonSteps(sqInt x1, sqInt x2, sqInt n);
static unsigned int destinationWordwith(unsigned int sourceWord, unsigned int destinationWord);
static sqInt destMaskAndPointerInit(void);
static unsigned int dither32To16threshold(unsigned int srcWord, sqInt ditherValue);
static sqInt drawLoopXY(sqInt xDelta, sqInt yDelta);
static sqInt dstLongAt(sqInt idx);
static sqInt dstLongAtput(sqInt idx, sqInt value);
static sqInt dstLongAtputmask(sqInt idx, sqInt srcValue, sqInt dstMask);
static unsigned int expensiveDither32To16threshold(unsigned int srcWord, sqInt ditherValue);
static sqInt fetchIntOrFloatofObject(sqInt fieldIndex, sqInt objectPointer);
static sqInt fetchIntOrFloatofObjectifNil(sqInt fieldIndex, sqInt objectPointer, sqInt defaultValue);
static unsigned int fixAlphawith(unsigned int sourceWord, unsigned int destinationWord);
EXPORT(const char*) getModuleName(void);
static sqInt halftoneAt(sqInt idx);
static sqInt ignoreSourceOrHalftone(sqInt formPointer);
static sqInt incDestIndex(sqInt offset);
static sqInt incSrcIndex(sqInt offset);
static sqInt initBBOpTable(void);
static sqInt initDither8Lookup(void);
EXPORT(sqInt) initialiseModule(void);
static sqInt isIdentityMapwith(int *shifts, unsigned int *masks);
static sqInt loadBitBltDestForm(void);
EXPORT(sqInt) loadBitBltFrom(sqInt bbObj);
static sqInt loadBitBltFromwarping(sqInt bbObj, sqInt aBool);
static sqInt loadBitBltSourceForm(void);
static sqInt loadColorMap(void);
static void * loadColorMapShiftOrMaskFrom(sqInt mapOop);
static sqInt loadHalftoneForm(void);
static sqInt loadSurfacePlugin(void);
static sqInt loadWarpBltFrom(sqInt bbObj);
static sqInt lockSurfaces(void);
static sqInt mapPixelflags(sqInt sourcePixel, sqInt mapperFlags);
static unsigned int mergewith(unsigned int sourceWord, unsigned int destinationWord);
EXPORT(sqInt) moduleUnloaded(char *aModuleName);
static sqInt OLDrgbDiffwith(sqInt sourceWord, sqInt destinationWord);
static sqInt OLDtallyIntoMapwith(sqInt sourceWord, sqInt destinationWord);
static unsigned int partitionedAddtonBitscomponentMaskcarryOverflowMask(unsigned int word1, unsigned int word2, sqInt nBits, unsigned int componentMask, unsigned int carryOverflowMask);
static unsigned int partitionedANDtonBitsnPartitions(unsigned int word1, unsigned int word2, sqInt nBits, sqInt nParts);
static unsigned int partitionedMaxwithnBitsnPartitions(unsigned int word1, unsigned int word2, sqInt nBits, sqInt nParts);
static unsigned int partitionedMinwithnBitsnPartitions(unsigned int word1, unsigned int word2, sqInt nBits, sqInt nParts);
static unsigned int partitionedMulwithnBitsnPartitions(unsigned int word1, unsigned int word2, sqInt nBits, sqInt nParts);
static unsigned int partitionedRgbComponentAlphadestnBitsnPartitions(unsigned int sourceWord, unsigned int destWord, sqInt nBits, sqInt nParts);
static unsigned int partitionedSubfromnBitsnPartitions(unsigned int word1, unsigned int word2, sqInt nBits, sqInt nParts);
static sqInt performCopyLoop(void);
static unsigned int pickSourcePixelsflagssrcMaskdestMasksrcShiftIncdstShiftInc(sqInt nPixels, sqInt mapperFlags, sqInt srcMask, sqInt dstMask, sqInt srcShiftInc, sqInt dstShiftInc);
static unsigned int pickWarpPixelAtXy(sqInt xx, sqInt yy);
static unsigned int pixClearwith(unsigned int sourceWord, unsigned int destinationWord);
static unsigned int pixMaskwith(unsigned int sourceWord, unsigned int destinationWord);
static unsigned int pixPaintwith(unsigned int sourceWord, unsigned int destinationWord);
static unsigned int pixSwapwith(unsigned int sourceWord, unsigned int destWord);
EXPORT(sqInt) primitiveCompareColors(void);
EXPORT(sqInt) primitiveCopyBits(void);
EXPORT(sqInt) primitiveDisplayString(void);
EXPORT(sqInt) primitiveDrawLoop(void);
EXPORT(sqInt) primitivePixelValueAt(void);
EXPORT(sqInt) primitiveWarpBits(void);
static sqInt reloadDestAndSourceForms(void);
static unsigned int rgbAddwith(unsigned int sourceWord, unsigned int destinationWord);
static sqInt rgbComponentAlpha16(void);
static sqInt rgbComponentAlpha32(void);
static sqInt rgbComponentAlpha32with(sqInt sourceWord, sqInt destinationWord);
static sqInt rgbComponentAlpha8(void);
static sqInt rgbComponentAlphawith(sqInt sourceWord, sqInt destinationWord);
static unsigned int rgbDiffwith(unsigned int sourceWord, unsigned int destinationWord);
static sqInt rgbMap16To32(sqInt sourcePixel);
static sqInt rgbMap32To32(sqInt sourcePixel);
static sqInt rgbMapPixelflags(sqInt sourcePixel, sqInt mapperFlags);
static sqInt rgbMapfromto(sqInt sourcePixel, sqInt nBitsIn, sqInt nBitsOut);
static unsigned int rgbMaxwith(unsigned int sourceWord, unsigned int destinationWord);
static unsigned int rgbMinInvertwith(unsigned int wordToInvert, unsigned int destinationWord);
static unsigned int rgbMinwith(unsigned int sourceWord, unsigned int destinationWord);
static unsigned int rgbMulwith(unsigned int sourceWord, unsigned int destinationWord);
static unsigned int rgbSubwith(unsigned int sourceWord, unsigned int destinationWord);
EXPORT(sqInt) setInterpreter(struct VirtualMachine*anInterpreter);
static sqInt setupColorMasks(void);
static sqInt setupColorMasksFromto(sqInt srcBits, sqInt targetBits);
static sqInt showDisplayBits(void);
static sqInt sourceSkewAndPointerInit(void);
static unsigned int sourceWordwith(unsigned int sourceWord, unsigned int destinationWord);
static sqInt sqAssert(sqInt aBool);
static sqInt srcLongAt(sqInt idx);
static unsigned int subWordwith(unsigned int sourceWord, unsigned int destinationWord);
static unsigned int tallyIntoMapwith(unsigned int sourceWord, unsigned int destinationWord);
static sqInt tallyMapAt(sqInt idx);
static sqInt tallyMapAtput(sqInt idx, sqInt value);
static sqInt tryCopyingBitsQuickly(void);
static sqInt unlockSurfaces(void);
static sqInt warpBits(void);
static sqInt warpLoop(void);
static sqInt warpLoopSetup(void);
static sqInt warpPickSmoothPixelsxDeltahyDeltahxDeltavyDeltavsourceMapsmoothingdstShiftInc(sqInt nPixels, sqInt xDeltah, sqInt yDeltah, sqInt xDeltav, sqInt yDeltav, sqInt sourceMap, sqInt n, sqInt dstShiftInc);
static sqInt warpPickSourcePixelsxDeltahyDeltahxDeltavyDeltavdstShiftIncflags(sqInt nPixels, sqInt xDeltah, sqInt yDeltah, sqInt xDeltav, sqInt yDeltav, sqInt dstShiftInc, sqInt mapperFlags);
/*** Variables ***/
static sqInt affectedB;
static sqInt affectedL;
static sqInt affectedR;
static sqInt affectedT;
static int bbH;
static int bbW;
static sqInt bitBltIsReceiver;
static sqInt bitBltOop;
static sqInt bitCount;
static sqInt clipHeight;
static sqInt clipWidth;
static sqInt clipX;
static sqInt clipY;
static sqInt cmBitsPerColor;
static sqInt cmFlags;
static unsigned int * cmLookupTable;
static sqInt cmMask;
static unsigned int * cmMaskTable;
static int * cmShiftTable;
static sqInt combinationRule;
static sqInt componentAlphaModeAlpha;
static sqInt componentAlphaModeColor;
static sqInt destBits;
static sqInt destDelta;
static int destDepth;
static sqInt destForm;
static int destHeight;
static sqInt destIndex;
static sqInt destMask;
static int destMSB;
static int destPitch;
static sqInt destPPW;
static int destWidth;
static sqInt destX;
static sqInt destY;
static unsigned char dither8Lookup[4096];
static const int ditherMatrix4x4[16] = {
0, 8, 2, 10,
12, 4, 14, 6,
3, 11, 1, 9,
15, 7, 13, 5
};
static const int ditherThresholds16[8] = { 0, 2, 4, 6, 8, 12, 14, 16 };
static const int ditherValues16[32] = {
0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30
};
static sqInt dstBitShift;
static int dx;
static int dy;
static unsigned char * gammaLookupTable;
static sqInt halftoneBase;
static sqInt halftoneForm;
static sqInt halftoneHeight;
static sqInt hasSurfaceLock;
static sqInt hDir;
static sqInt height;
#if !defined(SQUEAK_BUILTIN_PLUGIN)
static sqInt (*byteSizeOf)(sqInt oop);
static sqInt (*failed)(void);
static sqInt (*fetchIntegerofObject)(sqInt fieldIndex, sqInt objectPointer);
static sqInt (*fetchLong32ofObject)(sqInt fieldIndex, sqInt oop);
static sqInt (*fetchPointerofObject)(sqInt index, sqInt oop);
static void * (*firstIndexableField)(sqInt oop);
static double (*floatValueOf)(sqInt oop);
static sqInt (*integerObjectOf)(sqInt value);
static sqInt (*integerValueOf)(sqInt oop);
static void * (*ioLoadFunctionFrom)(char *functionName, char *moduleName);
static sqInt (*isArray)(sqInt oop);
static sqInt (*isBytes)(sqInt oop);
static sqInt (*isIntegerObject)(sqInt objectPointer);
static sqInt (*isPointers)(sqInt oop);
static sqInt (*isWords)(sqInt oop);
static sqInt (*isWordsOrBytes)(sqInt oop);
static sqInt (*methodArgumentCount)(void);
static sqInt (*nilObject)(void);
static sqInt (*pop)(sqInt nItems);
static sqInt (*popthenPush)(sqInt nItems, sqInt oop);
static sqInt (*positive32BitIntegerFor)(unsigned int integerValue);
static usqInt (*positive32BitValueOf)(sqInt oop);
static usqLong (*positive64BitValueOf)(sqInt oop);
static sqInt (*primitiveFail)(void);
static sqInt (*primitiveFailFor)(sqInt reasonCode);
static sqInt (*pushInteger)(sqInt integerValue);
static sqInt (*showDisplayBitsLeftTopRightBottom)(sqInt aForm, sqInt l, sqInt t, sqInt r, sqInt b);
static sqInt (*slotSizeOf)(sqInt oop);
static sqInt (*stackIntegerValue)(sqInt offset);
static sqInt (*stackObjectValue)(sqInt offset);
static sqInt (*stackValue)(sqInt offset);
static sqInt (*statNumGCs)(void);
static sqInt (*storeIntegerofObjectwithValue)(sqInt index, sqInt oop, sqInt integer);
#else /* !defined(SQUEAK_BUILTIN_PLUGIN) */
extern sqInt byteSizeOf(sqInt oop);
extern sqInt failed(void);
extern sqInt fetchIntegerofObject(sqInt fieldIndex, sqInt objectPointer);
extern sqInt fetchLong32ofObject(sqInt fieldIndex, sqInt oop);
extern sqInt fetchPointerofObject(sqInt index, sqInt oop);
extern void * firstIndexableField(sqInt oop);
extern double floatValueOf(sqInt oop);
extern sqInt integerObjectOf(sqInt value);
extern sqInt integerValueOf(sqInt oop);
extern void * ioLoadFunctionFrom(char *functionName, char *moduleName);
extern sqInt isArray(sqInt oop);
extern sqInt isBytes(sqInt oop);
#if !defined(isIntegerObject)
extern sqInt isIntegerObject(sqInt objectPointer);
#endif
extern sqInt isPointers(sqInt oop);
extern sqInt isWords(sqInt oop);
extern sqInt isWordsOrBytes(sqInt oop);
extern sqInt methodArgumentCount(void);
extern sqInt nilObject(void);
extern sqInt pop(sqInt nItems);
extern sqInt popthenPush(sqInt nItems, sqInt oop);
extern sqInt positive32BitIntegerFor(unsigned int integerValue);
extern usqInt positive32BitValueOf(sqInt oop);
extern usqLong positive64BitValueOf(sqInt oop);
extern sqInt primitiveFail(void);
extern sqInt primitiveFailFor(sqInt reasonCode);
extern sqInt pushInteger(sqInt integerValue);
extern sqInt showDisplayBitsLeftTopRightBottom(sqInt aForm, sqInt l, sqInt t, sqInt r, sqInt b);
extern sqInt slotSizeOf(sqInt oop);
extern sqInt stackIntegerValue(sqInt offset);
extern sqInt stackObjectValue(sqInt offset);
extern sqInt stackValue(sqInt offset);
extern sqInt statNumGCs(void);
extern sqInt storeIntegerofObjectwithValue(sqInt index, sqInt oop, sqInt integer);
extern
#endif
struct VirtualMachine* interpreterProxy;
static sqInt isWarping;
static sqIntptr_t (*lockSurfaceFn)(sqIntptr_t, int*, int, int, int, int);
static sqInt mask1;
static sqInt mask2;
static int maskTable[33] = {
0, 1, 3, 0, 15, 31, 0, 0, 255, 0, 0, 0, 0, 0, 0, 0, 65535,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1
};
static const char *moduleName =
#ifdef SQUEAK_BUILTIN_PLUGIN
"BitBltPlugin VMMaker.oscog-eem.2420 (i)"
#else
"BitBltPlugin VMMaker.oscog-eem.2420 (e)"
#endif
;
static sqInt noHalftone;
static sqInt noSource;
static sqInt numGCsOnInvocation;
static sqInt nWords;
static void *opTable[43];
static sqInt preload;
static int (*querySurfaceFn)(sqIntptr_t, int*, int*, int*, int*);
static sqInt skew;
static sqInt sourceAlpha;
static sqInt sourceBits;
static sqInt sourceDelta;
static int sourceDepth;
static sqInt sourceForm;
static int sourceHeight;
static sqInt sourceIndex;
static int sourceMSB;
static int sourcePitch;
static sqInt sourcePPW;
static int sourceWidth;
static sqInt sourceX;
static sqInt sourceY;
static sqInt srcBitShift;
static int sx;
static int sy;
static unsigned char * ungammaLookupTable;
static int (*unlockSurfaceFn)(sqIntptr_t, int, int, int, int);
static sqInt vDir;
static sqInt warpAlignMask;
static sqInt warpAlignShift;
static int warpBitShiftTable[32];
static sqInt warpSrcMask;
static sqInt warpSrcShift;
static sqInt width;
/* BitBltSimulation>>#addWord:with: */
static unsigned int
addWordwith(unsigned int sourceWord, unsigned int destinationWord)
{
return sourceWord + destinationWord;
}
/* BitBltSimulation>>#affectedBottom */
static sqInt
affectedBottom(void)
{
return affectedB;
}
/* BitBltSimulation>>#affectedLeft */
static sqInt
affectedLeft(void)
{
return affectedL;
}
/* BitBltSimulation>>#affectedRight */
static sqInt
affectedRight(void)
{
return affectedR;
}
/* BitBltSimulation>>#affectedTop */
static sqInt
affectedTop(void)
{
return affectedT;
}
/* BitBltSimulation>>#alphaBlendConst:with: */
static unsigned int
alphaBlendConstwith(unsigned int sourceWord, unsigned int destinationWord)
{
return alphaBlendConstwithpaintMode(sourceWord, destinationWord, 0);
}
/* Blend sourceWord with destinationWord using a constant alpha.
Alpha is encoded as 0 meaning 0.0, and 255 meaning 1.0.
The blend produced is alpha*source + (1.0-alpha)*dest, with the
computation being performed independently on each color component.
This function could eventually blend into any depth destination,
using the same color averaging and mapping as warpBlt.
paintMode = true means do nothing if the source pixel value is zero. */
/* This first implementation works with dest depths of 16 and 32 bits only.
Normal color mapping will allow sources of lower depths in this case,
and results can be mapped directly by truncation, so no extra color maps
are needed.
To allow storing into any depth will require subsequent addition of two
other colormaps, as is the case with WarpBlt.
*/
/* BitBltSimulation>>#alphaBlendConst:with:paintMode: */
static unsigned int
alphaBlendConstwithpaintMode(unsigned int sourceWord, unsigned int destinationWord, sqInt paintMode)
{
sqInt bitsPerColor;
unsigned int blend;
unsigned int blendAG;
unsigned int blendRB;
unsigned int destPixVal;
unsigned int destShifted;
sqInt i;
sqInt j;
unsigned int maskShifted;
unsigned int pixBlend;
unsigned int pixMask;
unsigned int result;
unsigned int rgbMask;
sqInt shift;
unsigned int sourcePixVal;
unsigned int sourceShifted;
unsigned int unAlpha;
if (destDepth < 16) {
return destinationWord;
}
unAlpha = 0xFF - sourceAlpha;
result = destinationWord;
if (destPPW == 1) {
/* 32bpp blends include alpha */
if (!(paintMode && (sourceWord == 0))) {
/* painting a transparent pixel */
/* blendRB red and blue */
blendRB = (((sourceWord & 16711935) * sourceAlpha) + ((destinationWord & 16711935) * unAlpha)) + 16711935;
/* blendRB alpha and green */
blendAG = ((((((usqInt) sourceWord) >> 8) & 16711935) * sourceAlpha) + (((((usqInt) destinationWord) >> 8) & 16711935) * unAlpha)) + 16711935;
/* divide by 255 */
blendRB = (((usqInt) (blendRB + ((((usqInt) (blendRB - 65537)) >> 8) & 16711935))) >> 8) & 16711935;
blendAG = (((usqInt) (blendAG + ((((usqInt) (blendAG - 65537)) >> 8) & 16711935))) >> 8) & 16711935;
result = blendRB | (((usqInt)(blendAG) << 8));
}
}
else {
pixMask = maskTable[destDepth];
bitsPerColor = 5;
rgbMask = 0x1F;
maskShifted = destMask;
destShifted = destinationWord;
sourceShifted = sourceWord;
for (j = 1; j <= destPPW; j += 1) {
sourcePixVal = sourceShifted & pixMask;
if (!(((maskShifted & pixMask) == 0)
|| (paintMode && (sourcePixVal == 0)))) {
destPixVal = destShifted & pixMask;
pixBlend = 0;
for (i = 1; i <= 3; i += 1) {
shift = (i - 1) * bitsPerColor;
blend = ((((((((usqInt) sourcePixVal) >> shift) & rgbMask) * sourceAlpha) + (((((usqInt) destPixVal) >> shift) & rgbMask) * unAlpha)) + 0xFE) / 0xFF) & rgbMask;
pixBlend = pixBlend | (((usqInt)(blend) << shift));
}
result = (result & ((unsigned int)~(((usqInt)(pixMask) << ((j - 1) * 16))))) | (((usqInt)(pixBlend) << ((j - 1) * 16)));
}
maskShifted = ((usqInt) maskShifted) >> destDepth;
sourceShifted = ((usqInt) sourceShifted) >> destDepth;
destShifted = ((usqInt) destShifted) >> destDepth;
}
}
return result;
}
/* Blend sourceWord with destinationWord using the alpha value from
sourceWord. Alpha is encoded as 0 meaning 0.0, and 255 meaning 1.0.
In contrast to alphaBlend:with: the color produced is
srcColor + (1-srcAlpha) * dstColor
e.g., it is assumed that the source color is already scaled.
*/
/* BitBltSimulation>>#alphaBlendScaled:with: */
static unsigned int
alphaBlendScaledwith(unsigned int sourceWord, unsigned int destinationWord)
{
unsigned int ag;
unsigned int rb;
unsigned int unAlpha;
/* Do NOT inline this into optimized loops */
/* High 8 bits of source pixel is source opacity (ARGB format) */
unAlpha = 0xFF - (((usqInt) sourceWord) >> 24);
/* blend red and blue components */
rb = ((((usqInt) ((destinationWord & 16711935) * unAlpha)) >> 8) & 16711935) + (sourceWord & 16711935);
/* blend alpha and green components */
ag = ((((usqInt) (((((usqInt) destinationWord) >> 8) & 16711935) * unAlpha)) >> 8) & 16711935) + ((((usqInt) sourceWord) >> 8) & 16711935);
/* saturate red and blue components if there is a carry */
rb = (rb & 16711935) | (((usqInt) ((rb & 16777472) * 0xFF)) >> 8);
/* saturate alpha and green components if there is a carry */
ag = (((usqInt)((ag & 16711935)) << 8)) | ((ag & 16777472) * 0xFF);
return ag | rb;
}
/* Blend sourceWord with destinationWord, assuming both are 32-bit pixels.
The source is assumed to have 255*alpha in the high 8 bits of each pixel,
while the high 8 bits of the destinationWord will be ignored.
The blend produced is alpha*source + (1-alpha)*dest, with
the computation being performed independently on each color
component. The high byte of the result will be 0. */
/* BitBltSimulation>>#alphaBlend:with: */
static unsigned int
alphaBlendwith(unsigned int sourceWord, unsigned int destinationWord)
{
unsigned int alpha;
unsigned int blendAG;
unsigned int blendRB;
unsigned int result;
unsigned int unAlpha;
/* High 8 bits of source pixel */
alpha = ((usqInt) sourceWord) >> 24;
if (alpha == 0) {
return destinationWord;
}
if (alpha == 0xFF) {
return sourceWord;
}
unAlpha = 0xFF - alpha;
/* blend red and blue */
blendRB = (((sourceWord & 16711935) * alpha) + ((destinationWord & 16711935) * unAlpha)) + 16711935;
/* blend alpha and green */
blendAG = (((((((usqInt) sourceWord) >> 8) | 0xFF0000) & 16711935) * alpha) + (((((usqInt) destinationWord) >> 8) & 16711935) * unAlpha)) + 16711935;
/* divide by 255 */
blendRB = (((usqInt) (blendRB + ((((usqInt) (blendRB - 65537)) >> 8) & 16711935))) >> 8) & 16711935;
blendAG = (((usqInt) (blendAG + ((((usqInt) (blendAG - 65537)) >> 8) & 16711935))) >> 8) & 16711935;
result = blendRB | (((usqInt)(blendAG) << 8));
return result;
}
/* BitBltSimulation>>#alphaPaintConst:with: */
static unsigned int
alphaPaintConstwith(unsigned int sourceWord, unsigned int destinationWord)
{
if (sourceWord == 0) {
return destinationWord;
}
return alphaBlendConstwithpaintMode(sourceWord, destinationWord, 1);
}
/* This version assumes
combinationRule = 34
sourcePixSize = 32
destPixSize = 16
sourceForm ~= destForm.
*/
/* BitBltSimulation>>#alphaSourceBlendBits16 */
static sqInt
alphaSourceBlendBits16(void)
{
sqInt addThreshold;
sqInt addThreshold1;
int deltaX;
int deltaY;
unsigned int destWord;
int ditherBase;
int ditherIndex;
int ditherThreshold;
sqInt dstIndex;
unsigned int dstMask;
sqInt dstValue;
sqInt dstValue1;
int dstY;
unsigned int sourceWord;
unsigned int srcAlpha;
sqInt srcIndex;
int srcShift;
int srcY;
/* This particular method should be optimized in itself */
/* So we can pre-decrement */
deltaY = bbH + 1;
srcY = sy;
dstY = dy;
srcShift = (dx & 1) * 16;
if (destMSB) {
srcShift = 16 - srcShift;
}
/* This is the outer loop */
mask1 = 0xFFFFU << (16 - srcShift);
while (((deltaY -= 1)) != 0) {
srcIndex = (sourceBits + (srcY * sourcePitch)) + (sx * 4);
dstIndex = (destBits + (dstY * destPitch)) + ((dx / 2) * 4);
ditherBase = (dstY & 3) * 4;
/* For pre-increment */
ditherIndex = (sx & 3) - 1;
/* So we can pre-decrement */
deltaX = bbW + 1;
dstMask = mask1;
if (dstMask == 0xFFFF) {
srcShift = 16;
}
else {
srcShift = 0;
}
while (((deltaX -= 1)) != 0) {
ditherThreshold = ditherMatrix4x4[ditherBase + ((ditherIndex = (ditherIndex + 1) & 3))];
sourceWord = long32At(srcIndex);
srcAlpha = ((usqInt) sourceWord) >> 24;
if (srcAlpha == 0xFF) {
/* Dither from 32 to 16 bit */
/* begin dither32To16:threshold: */
addThreshold = ((usqInt) ditherThreshold << 8);
sourceWord = ((((usqInt) (dither8Lookup[addThreshold + ((((usqInt) sourceWord >> 16)) & 0xFF)]) << 10)) + (((usqInt) (dither8Lookup[addThreshold + ((((usqInt) sourceWord >> 8)) & 0xFF)]) << 5))) + (dither8Lookup[addThreshold + (sourceWord & 0xFF)]);
if (sourceWord == 0) {
sourceWord = 1U << srcShift;
}
else {
sourceWord = ((usqInt)(sourceWord) << srcShift);
}
/* begin dstLongAt:put:mask: */
dstValue = long32At(dstIndex);
dstValue = dstValue & dstMask;
dstValue = dstValue | sourceWord;
/* begin dstLongAt:put: */
long32Atput(dstIndex, dstValue);
}
else {
/* srcAlpha ~= 255 */
if (!(srcAlpha == 0)) {
/* 0 < srcAlpha < 255 */
/* If we have to mix colors then just copy a single word */
destWord = long32At(dstIndex);
destWord = destWord & ((unsigned int)~dstMask);
/* Expand from 16 to 32 bit by adding zero bits */
destWord = ((usqInt) destWord) >> srcShift;
/* Mix colors */
destWord = ((((usqInt) (destWord & 0x7C00) << 9)) | (((usqInt) (destWord & 0x3E0) << 6))) | ((((usqInt) (destWord & 0x1F) << 3)) | 0xFF000000U);
/* And dither */
sourceWord = alphaBlendScaledwith(sourceWord, destWord);
/* begin dither32To16:threshold: */
addThreshold1 = ((usqInt) ditherThreshold << 8);
sourceWord = ((((usqInt) (dither8Lookup[addThreshold1 + ((((usqInt) sourceWord >> 16)) & 0xFF)]) << 10)) + (((usqInt) (dither8Lookup[addThreshold1 + ((((usqInt) sourceWord >> 8)) & 0xFF)]) << 5))) + (dither8Lookup[addThreshold1 + (sourceWord & 0xFF)]);
if (sourceWord == 0) {
sourceWord = 1U << srcShift;
}
else {
sourceWord = ((usqInt)(sourceWord) << srcShift);
}
/* begin dstLongAt:put:mask: */
dstValue1 = long32At(dstIndex);
dstValue1 = dstValue1 & dstMask;
dstValue1 = dstValue1 | sourceWord;
/* begin dstLongAt:put: */
long32Atput(dstIndex, dstValue1);
}
}
srcIndex += 4;
if (destMSB) {
if (srcShift == 0) {
dstIndex += 4;
}
}
else {
if (!(srcShift == 0)) {
dstIndex += 4;
}
}
/* Toggle between 0 and 16 */
srcShift = srcShift ^ 16;
dstMask = (unsigned int)~dstMask;
}
srcY += 1;
dstY += 1;
}
return 0;
}
/* This version assumes
combinationRule = 34
sourcePixSize = destPixSize = 32
sourceForm ~= destForm.
Note: The inner loop has been optimized for dealing
with the special cases of srcAlpha = 0.0 and srcAlpha = 1.0
*/
/* BitBltSimulation>>#alphaSourceBlendBits32 */
static sqInt
alphaSourceBlendBits32(void)
{
int deltaX;
int deltaY;
unsigned int destWord;
sqInt dstIndex;
int dstY;
unsigned int sourceWord;
unsigned int srcAlpha;
sqInt srcIndex;
int srcY;
/* This particular method should be optimized in itself */
/* Give the compile a couple of hints */
/* The following should be declared as pointers so the compiler will
notice that they're used for accessing memory locations
(good to know on an Intel architecture) but then the increments
would be different between ST code and C code so must hope the
compiler notices what happens (MS Visual C does) */
/* So we can pre-decrement */
deltaY = bbH + 1;
srcY = sy;
/* This is the outer loop */
dstY = dy;
while (((deltaY -= 1)) != 0) {
srcIndex = (sourceBits + (srcY * sourcePitch)) + (sx * 4);
dstIndex = (destBits + (dstY * destPitch)) + (dx * 4);
/* So we can pre-decrement */
/* This is the inner loop */
deltaX = bbW + 1;
while (((deltaX -= 1)) != 0) {
sourceWord = long32At(srcIndex);
srcAlpha = ((usqInt) sourceWord) >> 24;
if (srcAlpha == 0xFF) {
long32Atput(dstIndex, sourceWord);
srcIndex += 4;
/* Now copy as many words as possible with alpha = 255 */
dstIndex += 4;
while ((((deltaX -= 1)) != 0)
&& ((((usqInt) ((sourceWord = long32At(srcIndex)))) >> 24) == 0xFF)) {
long32Atput(dstIndex, sourceWord);
srcIndex += 4;
dstIndex += 4;
}
deltaX += 1;
}
else {
/* srcAlpha ~= 255 */
if (srcAlpha == 0) {
srcIndex += 4;
/* Now skip as many words as possible, */
dstIndex += 4;
while ((((deltaX -= 1)) != 0)
&& ((((usqInt) ((sourceWord = long32At(srcIndex)))) >> 24) == 0)) {
srcIndex += 4;
dstIndex += 4;
}
deltaX += 1;
}
else {
/* 0 < srcAlpha < 255 */
/* If we have to mix colors then just copy a single word */
destWord = long32At(dstIndex);
destWord = alphaBlendScaledwith(sourceWord, destWord);
long32Atput(dstIndex, destWord);
srcIndex += 4;
dstIndex += 4;
}
}
}
srcY += 1;
dstY += 1;
}
return 0;
}
/* This version assumes
combinationRule = 34
sourcePixSize = 32
destPixSize = 8
sourceForm ~= destForm.
Note: This is not real blending since we don't have the source colors
available. */
/* BitBltSimulation>>#alphaSourceBlendBits8 */
static sqInt
alphaSourceBlendBits8(void)
{
sqInt adjust;
int deltaX;
int deltaY;
unsigned int destWord;
sqInt dstIndex;
unsigned int dstMask;
sqInt dstValue;
int dstY;
sqInt mapperFlags;
unsigned int *mappingTable;
sqInt pv;
unsigned int sourceWord;
unsigned int srcAlpha;
sqInt srcIndex;
sqInt srcShift;
int srcY;
static unsigned int theTable[256] = {
0x0, 0xFF000001, 0xFFFFFFFF, 0xFF808080, 0xFFFF0000, 0xFF00FF00, 0xFF0000FF, 0xFF00FFFF,
0xFFFFFF00, 0xFFFF00FF, 0xFF202020, 0xFF404040, 0xFF606060, 0xFF9F9F9F, 0xFFBFBFBF, 0xFFDFDFDF,
0xFF080808, 0xFF101010, 0xFF181818, 0xFF282828, 0xFF303030, 0xFF383838, 0xFF484848, 0xFF505050,
0xFF585858, 0xFF686868, 0xFF707070, 0xFF787878, 0xFF878787, 0xFF8F8F8F, 0xFF979797, 0xFFA7A7A7,
0xFFAFAFAF, 0xFFB7B7B7, 0xFFC7C7C7, 0xFFCFCFCF, 0xFFD7D7D7, 0xFFE7E7E7, 0xFFEFEFEF, 0xFFF7F7F7,
0xFF000001, 0xFF003300, 0xFF006600, 0xFF009900, 0xFF00CC00, 0xFF00FF00, 0xFF000033, 0xFF003333,
0xFF006633, 0xFF009933, 0xFF00CC33, 0xFF00FF33, 0xFF000066, 0xFF003366, 0xFF006666, 0xFF009966,
0xFF00CC66, 0xFF00FF66, 0xFF000099, 0xFF003399, 0xFF006699, 0xFF009999, 0xFF00CC99, 0xFF00FF99,
0xFF0000CC, 0xFF0033CC, 0xFF0066CC, 0xFF0099CC, 0xFF00CCCC, 0xFF00FFCC, 0xFF0000FF, 0xFF0033FF,
0xFF0066FF, 0xFF0099FF, 0xFF00CCFF, 0xFF00FFFF, 0xFF330000, 0xFF333300, 0xFF336600, 0xFF339900,
0xFF33CC00, 0xFF33FF00, 0xFF330033, 0xFF333333, 0xFF336633, 0xFF339933, 0xFF33CC33, 0xFF33FF33,
0xFF330066, 0xFF333366, 0xFF336666, 0xFF339966, 0xFF33CC66, 0xFF33FF66, 0xFF330099, 0xFF333399,
0xFF336699, 0xFF339999, 0xFF33CC99, 0xFF33FF99, 0xFF3300CC, 0xFF3333CC, 0xFF3366CC, 0xFF3399CC,
0xFF33CCCC, 0xFF33FFCC, 0xFF3300FF, 0xFF3333FF, 0xFF3366FF, 0xFF3399FF, 0xFF33CCFF, 0xFF33FFFF,
0xFF660000, 0xFF663300, 0xFF666600, 0xFF669900, 0xFF66CC00, 0xFF66FF00, 0xFF660033, 0xFF663333,
0xFF666633, 0xFF669933, 0xFF66CC33, 0xFF66FF33, 0xFF660066, 0xFF663366, 0xFF666666, 0xFF669966,
0xFF66CC66, 0xFF66FF66, 0xFF660099, 0xFF663399, 0xFF666699, 0xFF669999, 0xFF66CC99, 0xFF66FF99,
0xFF6600CC, 0xFF6633CC, 0xFF6666CC, 0xFF6699CC, 0xFF66CCCC, 0xFF66FFCC, 0xFF6600FF, 0xFF6633FF,
0xFF6666FF, 0xFF6699FF, 0xFF66CCFF, 0xFF66FFFF, 0xFF990000, 0xFF993300, 0xFF996600, 0xFF999900,
0xFF99CC00, 0xFF99FF00, 0xFF990033, 0xFF993333, 0xFF996633, 0xFF999933, 0xFF99CC33, 0xFF99FF33,
0xFF990066, 0xFF993366, 0xFF996666, 0xFF999966, 0xFF99CC66, 0xFF99FF66, 0xFF990099, 0xFF993399,
0xFF996699, 0xFF999999, 0xFF99CC99, 0xFF99FF99, 0xFF9900CC, 0xFF9933CC, 0xFF9966CC, 0xFF9999CC,
0xFF99CCCC, 0xFF99FFCC, 0xFF9900FF, 0xFF9933FF, 0xFF9966FF, 0xFF9999FF, 0xFF99CCFF, 0xFF99FFFF,
0xFFCC0000, 0xFFCC3300, 0xFFCC6600, 0xFFCC9900, 0xFFCCCC00, 0xFFCCFF00, 0xFFCC0033, 0xFFCC3333,
0xFFCC6633, 0xFFCC9933, 0xFFCCCC33, 0xFFCCFF33, 0xFFCC0066, 0xFFCC3366, 0xFFCC6666, 0xFFCC9966,
0xFFCCCC66, 0xFFCCFF66, 0xFFCC0099, 0xFFCC3399, 0xFFCC6699, 0xFFCC9999, 0xFFCCCC99, 0xFFCCFF99,
0xFFCC00CC, 0xFFCC33CC, 0xFFCC66CC, 0xFFCC99CC, 0xFFCCCCCC, 0xFFCCFFCC, 0xFFCC00FF, 0xFFCC33FF,
0xFFCC66FF, 0xFFCC99FF, 0xFFCCCCFF, 0xFFCCFFFF, 0xFFFF0000, 0xFFFF3300, 0xFFFF6600, 0xFFFF9900,
0xFFFFCC00, 0xFFFFFF00, 0xFFFF0033, 0xFFFF3333, 0xFFFF6633, 0xFFFF9933, 0xFFFFCC33, 0xFFFFFF33,
0xFFFF0066, 0xFFFF3366, 0xFFFF6666, 0xFFFF9966, 0xFFFFCC66, 0xFFFFFF66, 0xFFFF0099, 0xFFFF3399,
0xFFFF6699, 0xFFFF9999, 0xFFFFCC99, 0xFFFFFF99, 0xFFFF00CC, 0xFFFF33CC, 0xFFFF66CC, 0xFFFF99CC,
0xFFFFCCCC, 0xFFFFFFCC, 0xFFFF00FF, 0xFFFF33FF, 0xFFFF66FF, 0xFFFF99FF, 0xFFFFCCFF, 0xFFFFFFFF};;
sqInt val;
mappingTable = theTable;
mapperFlags = cmFlags & ((unsigned int)~ColorMapNewStyle);
/* So we can pre-decrement */
deltaY = bbH + 1;
srcY = sy;
dstY = dy;
mask1 = (dx & 3) * 8;
if (destMSB) {
mask1 = 24 - mask1;
}
mask2 = AllOnes ^ (0xFFU << mask1);
if ((dx & 1) == 0) {
adjust = 0;
}
else {
adjust = 522133279;
}
if ((dy & 1) == 0) {
adjust = adjust ^ 522133279;
}
while (((deltaY -= 1)) != 0) {
adjust = adjust ^ 522133279;
srcIndex = (sourceBits + (srcY * sourcePitch)) + (sx * 4);
dstIndex = (destBits + (dstY * destPitch)) + ((dx / 4) * 4);
/* So we can pre-decrement */
deltaX = bbW + 1;
srcShift = mask1;
/* This is the inner loop */
dstMask = mask2;
while (((deltaX -= 1)) != 0) {
sourceWord = ((long32At(srcIndex)) & ((unsigned int)~adjust)) + adjust;
srcAlpha = ((usqInt) sourceWord) >> 24;
if (srcAlpha > 0x1F) {
/* Everything below 31 is transparent */
if (srcAlpha < 224) {
/* Everything above 224 is opaque */
destWord = long32At(dstIndex);
destWord = destWord & ((unsigned int)~dstMask);
destWord = ((usqInt) destWord) >> srcShift;
destWord = mappingTable[destWord];
sourceWord = alphaBlendScaledwith(sourceWord, destWord);
}
/* begin mapPixel:flags: */
pv = sourceWord;
if ((mapperFlags & ColorMapPresent) != 0) {
if ((mapperFlags & ColorMapFixedPart) != 0) {
/* begin rgbMapPixel:flags: */
val = (((((int) (cmShiftTable[0]))) < 0) ? ((usqInt) (sourceWord & (cmMaskTable[0])) >> -(((int) (cmShiftTable[0])))) : ((usqInt) (sourceWord & (cmMaskTable[0])) << (((int) (cmShiftTable[0])))));
val = val | ((((((int) (cmShiftTable[1]))) < 0) ? ((usqInt) (sourceWord & (cmMaskTable[1])) >> -(((int) (cmShiftTable[1])))) : ((usqInt) (sourceWord & (cmMaskTable[1])) << (((int) (cmShiftTable[1]))))));
val = val | ((((((int) (cmShiftTable[2]))) < 0) ? ((usqInt) (sourceWord & (cmMaskTable[2])) >> -(((int) (cmShiftTable[2])))) : ((usqInt) (sourceWord & (cmMaskTable[2])) << (((int) (cmShiftTable[2]))))));
pv = val | ((((((int) (cmShiftTable[3]))) < 0) ? ((usqInt) (sourceWord & (cmMaskTable[3])) >> -(((int) (cmShiftTable[3])))) : ((usqInt) (sourceWord & (cmMaskTable[3])) << (((int) (cmShiftTable[3]))))));
if ((pv == 0)
&& (sourceWord != 0)) {
pv = 1;
}
}
if ((mapperFlags & ColorMapIndexedPart) != 0) {
pv = cmLookupTable[pv & cmMask];
}
}
sourceWord = pv;
/* Store back */
sourceWord = ((usqInt)(sourceWord) << srcShift);
/* begin dstLongAt:put:mask: */
dstValue = long32At(dstIndex);
dstValue = dstValue & dstMask;
dstValue = dstValue | sourceWord;
/* begin dstLongAt:put: */
long32Atput(dstIndex, dstValue);
}
srcIndex += 4;
if (destMSB) {
if (srcShift == 0) {
dstIndex += 4;
srcShift = 24;
dstMask = 0xFFFFFF;