--- /dev/null
+//========================================================================
+//
+// Function.h
+//
+// Copyright 2001-2003 Glyph & Cog, LLC
+//
+//========================================================================
+
+#ifndef FUNCTION_H
+#define FUNCTION_H
+
+#include <aconf.h>
+
+#ifdef USE_GCC_PRAGMAS
+#pragma interface
+#endif
+
+#include "gtypes.h"
+#include "Object.h"
+
+class Dict;
+class Stream;
+struct PSObject;
+class PSStack;
+
+//------------------------------------------------------------------------
+// Function
+//------------------------------------------------------------------------
+
+#define funcMaxInputs 8
+#define funcMaxOutputs 32
+
+class Function {
+public:
+
+ Function();
+
+ virtual ~Function();
+
+ // Construct a function. Returns NULL if unsuccessful.
+ static Function *parse(Object *funcObj);
+
+ // Initialize the entries common to all function types.
+ GBool init(Dict *dict);
+
+ virtual Function *copy() = 0;
+
+ // Return the function type:
+ // -1 : identity
+ // 0 : sampled
+ // 2 : exponential
+ // 3 : stitching
+ // 4 : PostScript
+ virtual int getType() = 0;
+
+ // Return size of input and output tuples.
+ int getInputSize() { return m; }
+ int getOutputSize() { return n; }
+
+ double getDomainMin(int i) { return domain[i][0]; }
+ double getDomainMax(int i) { return domain[i][1]; }
+ double getRangeMin(int i) { return range[i][0]; }
+ double getRangeMax(int i) { return range[i][1]; }
+ GBool getHasRange() { return hasRange; }
+
+ // Transform an input tuple into an output tuple.
+ virtual void transform(double *in, double *out) = 0;
+
+ virtual GBool isOk() = 0;
+
+protected:
+
+ int m, n; // size of input and output tuples
+ double // min and max values for function domain
+ domain[funcMaxInputs][2];
+ double // min and max values for function range
+ range[funcMaxOutputs][2];
+ GBool hasRange; // set if range is defined
+};
+
+//------------------------------------------------------------------------
+// IdentityFunction
+//------------------------------------------------------------------------
+
+class IdentityFunction: public Function {
+public:
+
+ IdentityFunction();
+ virtual ~IdentityFunction();
+ virtual Function *copy() { return new IdentityFunction(); }
+ virtual int getType() { return -1; }
+ virtual void transform(double *in, double *out);
+ virtual GBool isOk() { return gTrue; }
+
+private:
+};
+
+//------------------------------------------------------------------------
+// SampledFunction
+//------------------------------------------------------------------------
+
+class SampledFunction: public Function {
+public:
+
+ SampledFunction(Object *funcObj, Dict *dict);
+ virtual ~SampledFunction();
+ virtual Function *copy() { return new SampledFunction(this); }
+ virtual int getType() { return 0; }
+ virtual void transform(double *in, double *out);
+ virtual GBool isOk() { return ok; }
+
+ int getSampleSize(int i) { return sampleSize[i]; }
+ double getEncodeMin(int i) { return encode[i][0]; }
+ double getEncodeMax(int i) { return encode[i][1]; }
+ double getDecodeMin(int i) { return decode[i][0]; }
+ double getDecodeMax(int i) { return decode[i][1]; }
+ double *getSamples() { return samples; }
+
+private:
+
+ SampledFunction(SampledFunction *func);
+
+ int // number of samples for each domain element
+ sampleSize[funcMaxInputs];
+ double // min and max values for domain encoder
+ encode[funcMaxInputs][2];
+ double // min and max values for range decoder
+ decode[funcMaxOutputs][2];
+ double // input multipliers
+ inputMul[funcMaxInputs];
+ int idxMul[funcMaxInputs]; // sample array index multipliers
+ double *samples; // the samples
+ int nSamples; // size of the samples array
+ GBool ok;
+};
+
+//------------------------------------------------------------------------
+// ExponentialFunction
+//------------------------------------------------------------------------
+
+class ExponentialFunction: public Function {
+public:
+
+ ExponentialFunction(Object *funcObj, Dict *dict);
+ virtual ~ExponentialFunction();
+ virtual Function *copy() { return new ExponentialFunction(this); }
+ virtual int getType() { return 2; }
+ virtual void transform(double *in, double *out);
+ virtual GBool isOk() { return ok; }
+
+ double *getC0() { return c0; }
+ double *getC1() { return c1; }
+ double getE() { return e; }
+
+private:
+
+ ExponentialFunction(ExponentialFunction *func);
+
+ double c0[funcMaxOutputs];
+ double c1[funcMaxOutputs];
+ double e;
+ GBool ok;
+};
+
+//------------------------------------------------------------------------
+// StitchingFunction
+//------------------------------------------------------------------------
+
+class StitchingFunction: public Function {
+public:
+
+ StitchingFunction(Object *funcObj, Dict *dict);
+ virtual ~StitchingFunction();
+ virtual Function *copy() { return new StitchingFunction(this); }
+ virtual int getType() { return 3; }
+ virtual void transform(double *in, double *out);
+ virtual GBool isOk() { return ok; }
+
+ int getNumFuncs() { return k; }
+ Function *getFunc(int i) { return funcs[i]; }
+ double *getBounds() { return bounds; }
+ double *getEncode() { return encode; }
+
+private:
+
+ StitchingFunction(StitchingFunction *func);
+
+ int k;
+ Function **funcs;
+ double *bounds;
+ double *encode;
+ GBool ok;
+};
+
+//------------------------------------------------------------------------
+// PostScriptFunction
+//------------------------------------------------------------------------
+
+class PostScriptFunction: public Function {
+public:
+
+ PostScriptFunction(Object *funcObj, Dict *dict);
+ virtual ~PostScriptFunction();
+ virtual Function *copy() { return new PostScriptFunction(this); }
+ virtual int getType() { return 4; }
+ virtual void transform(double *in, double *out);
+ virtual GBool isOk() { return ok; }
+
+ GString *getCodeString() { return codeString; }
+
+private:
+
+ PostScriptFunction(PostScriptFunction *func);
+ GBool parseCode(Stream *str, int *codePtr);
+ GString *getToken(Stream *str);
+ void resizeCode(int newSize);
+ void exec(PSStack *stack, int codePtr);
+
+ GString *codeString;
+ PSObject *code;
+ int codeSize;
+ GBool ok;
+};
+
+#endif
git.asbjorn.biz / swftools.git / blobdiff