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//---------------------------------------------------------------------------------
//
// Little Color Management System, fast floating point extensions
// Copyright (c) 1998-2020 Marti Maria Saguer, all rights reserved
//
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
//---------------------------------------------------------------------------------
#include "fast_float_internal.h"
// Curves, optimization is valid for 8 bits only
typedef struct {
int nCurves;
cmsUInt8Number Curves[cmsMAXCHANNELS][256];
} Curves8Data;
// Evaluator for RGB 8-bit curves. This are just 1D tables
static void FastEvaluateRGBCurves8(cmsContext ContextID,
struct _cmstransform_struct *CMMcargo,
const void* Input,
void* Output,
cmsUInt32Number PixelsPerLine,
cmsUInt32Number LineCount,
const cmsStride* Stride)
{
cmsUInt32Number i, ii;
cmsUInt32Number SourceStartingOrder[cmsMAXCHANNELS];
cmsUInt32Number SourceIncrements[cmsMAXCHANNELS];
cmsUInt32Number DestStartingOrder[cmsMAXCHANNELS];
cmsUInt32Number DestIncrements[cmsMAXCHANNELS];
const cmsUInt8Number* rin;
const cmsUInt8Number* gin;
const cmsUInt8Number* bin;
const cmsUInt8Number* ain = NULL;
cmsUInt8Number* rout;
cmsUInt8Number* gout;
cmsUInt8Number* bout;
cmsUInt8Number* aout = NULL;
cmsUInt32Number nalpha, strideIn, strideOut;
Curves8Data* Data = (Curves8Data*)_cmsGetTransformUserData(CMMcargo);
_cmsComputeComponentIncrements(cmsGetTransformInputFormat(ContextID, (cmsHTRANSFORM)CMMcargo), Stride->BytesPerPlaneIn, NULL, &nalpha, SourceStartingOrder, SourceIncrements);
_cmsComputeComponentIncrements(cmsGetTransformOutputFormat(ContextID, (cmsHTRANSFORM)CMMcargo), Stride->BytesPerPlaneOut, NULL, &nalpha, DestStartingOrder, DestIncrements);
strideIn = strideOut = 0;
for (i = 0; i < LineCount; i++) {
rin = (const cmsUInt8Number*)Input + SourceStartingOrder[0] + strideIn;
gin = (const cmsUInt8Number*)Input + SourceStartingOrder[1] + strideIn;
bin = (const cmsUInt8Number*)Input + SourceStartingOrder[2] + strideIn;
if (nalpha)
ain = (const cmsUInt8Number*)Input + SourceStartingOrder[3] + strideIn;
rout = (cmsUInt8Number*)Output + DestStartingOrder[0] + strideOut;
gout = (cmsUInt8Number*)Output + DestStartingOrder[1] + strideOut;
bout = (cmsUInt8Number*)Output + DestStartingOrder[2] + strideOut;
if (nalpha)
aout = (cmsUInt8Number*)Output + DestStartingOrder[3] + strideOut;
for (ii = 0; ii < PixelsPerLine; ii++) {
*rout = Data->Curves[0][*rin];
*gout = Data->Curves[1][*gin];
*bout = Data->Curves[2][*bin];
// Handle alpha
if (ain) {
*aout = *ain;
}
rin += SourceIncrements[0];
gin += SourceIncrements[1];
bin += SourceIncrements[2];
if (ain) ain += SourceIncrements[3];
rout += DestIncrements[0];
gout += DestIncrements[1];
bout += DestIncrements[2];
if (aout) aout += DestIncrements[3];
}
strideIn += Stride->BytesPerLineIn;
strideOut += Stride->BytesPerLineOut;
}
}
// Do nothing but arrange the format. RGB
static void FastRGBIdentity8(cmsContext ContextID,
struct _cmstransform_struct *CMMcargo,
const void* Input,
void* Output,
cmsUInt32Number PixelsPerLine,
cmsUInt32Number LineCount,
const cmsStride* Stride)
{
cmsUInt32Number i, ii;
cmsUInt32Number SourceStartingOrder[cmsMAXCHANNELS];
cmsUInt32Number SourceIncrements[cmsMAXCHANNELS];
cmsUInt32Number DestStartingOrder[cmsMAXCHANNELS];
cmsUInt32Number DestIncrements[cmsMAXCHANNELS];
const cmsUInt8Number* rin;
const cmsUInt8Number* gin;
const cmsUInt8Number* bin;
const cmsUInt8Number* ain = NULL;
cmsUInt8Number* rout;
cmsUInt8Number* gout;
cmsUInt8Number* bout;
cmsUInt8Number* aout = NULL;
cmsUInt32Number nalpha, strideIn, strideOut;
_cmsComputeComponentIncrements(cmsGetTransformInputFormat(ContextID, (cmsHTRANSFORM)CMMcargo), Stride->BytesPerPlaneIn, NULL, &nalpha, SourceStartingOrder, SourceIncrements);
_cmsComputeComponentIncrements(cmsGetTransformOutputFormat(ContextID, (cmsHTRANSFORM)CMMcargo), Stride->BytesPerPlaneOut, NULL, &nalpha, DestStartingOrder, DestIncrements);
strideIn = strideOut = 0;
for (i = 0; i < LineCount; i++) {
rin = (const cmsUInt8Number*)Input + SourceStartingOrder[0] + strideIn;
gin = (const cmsUInt8Number*)Input + SourceStartingOrder[1] + strideIn;
bin = (const cmsUInt8Number*)Input + SourceStartingOrder[2] + strideIn;
if (nalpha)
ain = (const cmsUInt8Number*)Input + SourceStartingOrder[3] + strideIn;
rout = (cmsUInt8Number*)Output + DestStartingOrder[0] + strideOut;
gout = (cmsUInt8Number*)Output + DestStartingOrder[1] + strideOut;
bout = (cmsUInt8Number*)Output + DestStartingOrder[2] + strideOut;
if (nalpha)
aout = (cmsUInt8Number*)Output + DestStartingOrder[3] + strideOut;
for (ii = 0; ii < PixelsPerLine; ii++) {
*rout = *rin;
*gout = *gin;
*bout = *bin;
// Handle alpha
if (ain) {
*aout = *ain;
}
rin += SourceIncrements[0];
gin += SourceIncrements[1];
bin += SourceIncrements[2];
if (ain) ain += SourceIncrements[3];
rout += DestIncrements[0];
gout += DestIncrements[1];
bout += DestIncrements[2];
if (aout) aout += DestIncrements[3];
}
strideIn += Stride->BytesPerLineIn;
strideOut += Stride->BytesPerLineOut;
}
}
// Evaluate 1 channel only
static void FastEvaluateGrayCurves8(cmsContext ContextID,
struct _cmstransform_struct *CMMcargo,
const void* Input,
void* Output,
cmsUInt32Number PixelsPerLine,
cmsUInt32Number LineCount,
const cmsStride* Stride)
{
cmsUInt32Number i, ii;
cmsUInt32Number SourceStartingOrder[cmsMAXCHANNELS];
cmsUInt32Number SourceIncrements[cmsMAXCHANNELS];
cmsUInt32Number DestStartingOrder[cmsMAXCHANNELS];
cmsUInt32Number DestIncrements[cmsMAXCHANNELS];
const cmsUInt8Number* gin;
const cmsUInt8Number* ain = NULL;
cmsUInt8Number* gout;
cmsUInt8Number* aout = NULL;
cmsUInt32Number nalpha, strideIn, strideOut;
Curves8Data* Data = (Curves8Data*)_cmsGetTransformUserData(CMMcargo);
_cmsComputeComponentIncrements(cmsGetTransformInputFormat(ContextID, (cmsHTRANSFORM)CMMcargo), Stride->BytesPerPlaneIn, NULL, &nalpha, SourceStartingOrder, SourceIncrements);
_cmsComputeComponentIncrements(cmsGetTransformOutputFormat(ContextID, (cmsHTRANSFORM)CMMcargo), Stride->BytesPerPlaneOut, NULL, &nalpha, DestStartingOrder, DestIncrements);
strideIn = strideOut = 0;
for (i = 0; i < LineCount; i++) {
gin = (const cmsUInt8Number*)Input + SourceStartingOrder[0] + strideIn;
if (nalpha)
ain = (const cmsUInt8Number*)Input + SourceStartingOrder[1] + strideIn;
gout = (cmsUInt8Number*)Output + DestStartingOrder[0] + strideOut;
if (nalpha)
aout = (cmsUInt8Number*)Output + DestStartingOrder[1] + strideOut;
for (ii = 0; ii < PixelsPerLine; ii++) {
*gout = Data->Curves[0][*gin];
// Handle alpha
if (ain) {
*aout = *ain;
}
gin += SourceIncrements[0];
if (ain) ain += SourceIncrements[1];
gout += DestIncrements[0];
if (aout) aout += DestIncrements[1];
}
strideIn += Stride->BytesPerLineIn;
strideOut += Stride->BytesPerLineOut;
}
}
static void FastGrayIdentity8(cmsContext ContextID,
struct _cmstransform_struct *CMMcargo,
const void* Input,
void* Output,
cmsUInt32Number PixelsPerLine,
cmsUInt32Number LineCount,
const cmsStride* Stride)
{
cmsUInt32Number i, ii;
cmsUInt32Number SourceStartingOrder[cmsMAXCHANNELS];
cmsUInt32Number SourceIncrements[cmsMAXCHANNELS];
cmsUInt32Number DestStartingOrder[cmsMAXCHANNELS];
cmsUInt32Number DestIncrements[cmsMAXCHANNELS];
const cmsUInt8Number* gin;
const cmsUInt8Number* ain = NULL;
cmsUInt8Number* gout;
cmsUInt8Number* aout = NULL;
cmsUInt32Number nalpha, strideIn, strideOut;
_cmsComputeComponentIncrements(cmsGetTransformInputFormat(ContextID, (cmsHTRANSFORM)CMMcargo), Stride->BytesPerPlaneIn, NULL, &nalpha, SourceStartingOrder, SourceIncrements);
_cmsComputeComponentIncrements(cmsGetTransformOutputFormat(ContextID, (cmsHTRANSFORM)CMMcargo), Stride->BytesPerPlaneOut, NULL, &nalpha, DestStartingOrder, DestIncrements);
strideIn = strideOut = 0;
for (i = 0; i < LineCount; i++) {
gin = (const cmsUInt8Number*)Input + SourceStartingOrder[0] + strideIn;
if (nalpha)
ain = (const cmsUInt8Number*)Input + SourceStartingOrder[1] + strideIn;
gout = (cmsUInt8Number*)Output + DestStartingOrder[0] + strideOut;
if (nalpha)
aout = (cmsUInt8Number*)Output + DestStartingOrder[1] + strideOut;
for (ii = 0; ii < PixelsPerLine; ii++) {
*gout = *gin;
// Handle alpha
if (ain) {
*aout = *ain;
}
gin += SourceIncrements[0];
if (ain) ain += SourceIncrements[1];
gout += DestIncrements[0];
if (aout) aout += DestIncrements[1];
}
strideIn += Stride->BytesPerLineIn;
strideOut += Stride->BytesPerLineOut;
}
}
// Try to see if the curves are linear
static
cmsBool AllCurvesAreLinear(Curves8Data* data)
{
int i, j;
for (i=0; i < 3; i++) {
for (j = 0; j < 256; j++) {
if (data ->Curves[i][j] != j) return FALSE;
}
}
return TRUE;
}
static
Curves8Data* ComputeCompositeCurves(cmsContext ContextID, cmsUInt32Number nChan, cmsPipeline* Src)
{
cmsUInt32Number i, j;
cmsFloat32Number InFloat[3], OutFloat[3];
Curves8Data* Data = (Curves8Data*) _cmsMallocZero(ContextID, sizeof(Curves8Data));
if (Data == NULL) return NULL;
// Create target curves
for (i=0; i < 256; i++) {
for (j=0; j <nChan; j++)
InFloat[j] = (cmsFloat32Number) ((cmsFloat64Number) i / 255.0);
cmsPipelineEvalFloat(ContextID, InFloat, OutFloat, Src);
for (j=0; j < nChan; j++)
Data -> Curves[j][i] = FROM_16_TO_8(_cmsSaturateWord(OutFloat[j] * 65535.0));
}
return Data;
}
// If the target LUT holds only curves, the optimization procedure is to join all those
// curves together. That only works on curves and does not work on matrices.
// Any number of channels up to 16
cmsBool Optimize8ByJoiningCurves(cmsContext ContextID,
_cmsTransformFn* TransformFn,
void** UserData,
_cmsFreeUserDataFn* FreeUserData,
cmsPipeline** Lut,
cmsUInt32Number* InputFormat,
cmsUInt32Number* OutputFormat,
cmsUInt32Number* dwFlags)
{
cmsPipeline* Src = *Lut;
cmsStage* mpe;
Curves8Data* Data;
cmsUInt32Number nChans;
// This is a loosy optimization! does not apply in floating-point cases
if (T_FLOAT(*InputFormat) || T_FLOAT(*OutputFormat)) return FALSE;
// Only on 8-bit
if (T_BYTES(*InputFormat) != 1 || T_BYTES(*OutputFormat) != 1) return FALSE;
// Curves need same channels on input and output (despite extra channels may differ)
nChans = T_CHANNELS(*InputFormat);
if (nChans != T_CHANNELS(*OutputFormat)) return FALSE;
// gray and RGB
if (nChans != 1 && nChans != 3) return FALSE;
// Only curves in this LUT?
for (mpe = cmsPipelineGetPtrToFirstStage(ContextID, Src);
mpe != NULL;
mpe = cmsStageNext(ContextID, mpe)) {
if (cmsStageType(ContextID, mpe) != cmsSigCurveSetElemType) return FALSE;
}
Data = ComputeCompositeCurves(ContextID, nChans, Src);
*dwFlags |= cmsFLAGS_NOCACHE;
*dwFlags &= ~cmsFLAGS_CAN_CHANGE_FORMATTER;
*UserData = Data;
*FreeUserData = _cmsFree;
// Maybe the curves are linear at the end
if (nChans == 1)
*TransformFn = (_cmsTransformFn) (AllCurvesAreLinear(Data) ? FastGrayIdentity8 : FastEvaluateGrayCurves8);
else
*TransformFn = (_cmsTransformFn) (AllCurvesAreLinear(Data) ? FastRGBIdentity8 : FastEvaluateRGBCurves8);
return TRUE;
}
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