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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrDrawState.h"
#include "GrPaint.h"
void GrDrawState::setFromPaint(const GrPaint& paint) {
for (int i = 0; i < GrPaint::kMaxColorStages; ++i) {
int s = i + GrPaint::kFirstColorStage;
if (paint.isColorStageEnabled(i)) {
*this->stage(s) = paint.getColorStage(i);
}
}
this->setFirstCoverageStage(GrPaint::kFirstCoverageStage);
for (int i = 0; i < GrPaint::kMaxCoverageStages; ++i) {
int s = i + GrPaint::kFirstCoverageStage;
if (paint.isCoverageStageEnabled(i)) {
*this->stage(s) = paint.getCoverageStage(i);
}
}
// disable all stages not accessible via the paint
for (int s = GrPaint::kTotalStages; s < GrDrawState::kNumStages; ++s) {
this->disableStage(s);
}
this->setColor(paint.getColor());
this->setState(GrDrawState::kDither_StateBit, paint.isDither());
this->setState(GrDrawState::kHWAntialias_StateBit, paint.isAntiAlias());
this->setBlendFunc(paint.getSrcBlendCoeff(), paint.getDstBlendCoeff());
this->setColorFilter(paint.getColorFilterColor(), paint.getColorFilterMode());
this->setCoverage(paint.getCoverage());
}
////////////////////////////////////////////////////////////////////////////////
void GrDrawState::AutoViewMatrixRestore::restore() {
if (NULL != fDrawState) {
fDrawState->setViewMatrix(fViewMatrix);
for (int s = 0; s < GrDrawState::kNumStages; ++s) {
if (fRestoreMask & (1 << s)) {
fDrawState->stage(s)->restoreCoordChange(fSavedCoordChanges[s]);
}
}
}
fDrawState = NULL;
}
void GrDrawState::AutoViewMatrixRestore::set(GrDrawState* drawState,
const SkMatrix& preconcatMatrix,
uint32_t explicitCoordStageMask) {
this->restore();
fDrawState = drawState;
if (NULL == drawState) {
return;
}
fRestoreMask = 0;
fViewMatrix = drawState->getViewMatrix();
drawState->preConcatViewMatrix(preconcatMatrix);
for (int s = 0; s < GrDrawState::kNumStages; ++s) {
if (!(explicitCoordStageMask & (1 << s)) && drawState->isStageEnabled(s)) {
fRestoreMask |= (1 << s);
fDrawState->stage(s)->saveCoordChange(&fSavedCoordChanges[s]);
drawState->stage(s)->preConcatCoordChange(preconcatMatrix);
}
}
}
////////////////////////////////////////////////////////////////////////////////
void GrDrawState::AutoDeviceCoordDraw::restore() {
if (NULL != fDrawState) {
fDrawState->setViewMatrix(fViewMatrix);
for (int s = 0; s < GrDrawState::kNumStages; ++s) {
if (fRestoreMask & (1 << s)) {
fDrawState->stage(s)->restoreCoordChange(fSavedCoordChanges[s]);
}
}
}
fDrawState = NULL;
}
bool GrDrawState::AutoDeviceCoordDraw::set(GrDrawState* drawState,
uint32_t explicitCoordStageMask) {
GrAssert(NULL != drawState);
this->restore();
fDrawState = drawState;
if (NULL == fDrawState) {
return false;
}
fViewMatrix = drawState->getViewMatrix();
fRestoreMask = 0;
SkMatrix invVM;
bool inverted = false;
for (int s = 0; s < GrDrawState::kNumStages; ++s) {
if (!(explicitCoordStageMask & (1 << s)) && drawState->isStageEnabled(s)) {
if (!inverted && !fViewMatrix.invert(&invVM)) {
// sad trombone sound
fDrawState = NULL;
return false;
} else {
inverted = true;
}
fRestoreMask |= (1 << s);
GrEffectStage* stage = drawState->stage(s);
stage->saveCoordChange(&fSavedCoordChanges[s]);
stage->preConcatCoordChange(invVM);
}
}
drawState->viewMatrix()->reset();
return true;
}
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