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add toggle keys:

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'x' -- flip around X axis
'y' -- flip around Y axis
'b' -- toggle between normal, forced-on and forced-off antialiasing



git-svn-id: http://skia.googlecode.com/svn/trunk@1054 2bbb7eff-a529-9590-31e7-b0007b416f81
This commit is contained in:
reed@google.com 2011-04-05 13:07:03 +00:00
parent 261c20a122
commit 569e0435af
1 changed files with 99 additions and 34 deletions
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133
samplecode/SampleApp.cpp
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@ -79,22 +79,40 @@ static void testpdf() {
//////////////////////////////////////////////////////////////////////////////
enum FlipAxisEnum {
kFlipAxis_X = (1 << 0),
kFlipAxis_Y = (1 << 1)
};
enum SkTriState {
kFalse_SkTriState,
kTrue_SkTriState,
kUnknown_SkTriState,
};
static SkTriState cycle_tristate(SkTriState state) {
static const SkTriState gCycle[] = {
/* kFalse_SkTriState -> */ kUnknown_SkTriState,
/* kTrue_SkTriState -> */ kFalse_SkTriState,
/* kUnknown_SkTriState -> */ kTrue_SkTriState,
};
return gCycle[state];
}
#include "SkDrawFilter.h"
class LCDTextDrawFilter : public SkDrawFilter {
class FlagsDrawFilter : public SkDrawFilter {
public:
enum Mode {
kNeutral_Mode,
kForceOn_Mode,
kForceOff_Mode
};
LCDTextDrawFilter(Mode mode) : fMode(mode) {}
FlagsDrawFilter(SkTriState lcd, SkTriState aa) : fLCDState(lcd), fAAState(aa) {}
virtual bool filter(SkCanvas*, SkPaint* paint, Type t) {
if (kText_Type == t && kNeutral_Mode != fMode) {
if (kText_Type == t && kUnknown_SkTriState != fLCDState) {
fPrevLCD = paint->isLCDRenderText();
paint->setLCDRenderText(kForceOn_Mode == fMode);
paint->setLCDRenderText(kTrue_SkTriState == fLCDState);
}
if (kUnknown_SkTriState != fAAState) {
fPrevAA = paint->isAntiAlias();
paint->setAntiAlias(kTrue_SkTriState == fAAState);
}
return true;
}
@ -103,25 +121,21 @@ public:
canvas/paint to their previous states
*/
virtual void restore(SkCanvas*, SkPaint* paint, Type t) {
if (kText_Type == t && kNeutral_Mode != fMode) {
if (kText_Type == t && kUnknown_SkTriState != fLCDState) {
paint->setLCDRenderText(fPrevLCD);
}
if (kUnknown_SkTriState != fAAState) {
paint->setAntiAlias(fPrevAA);
}
}
private:
Mode fMode;
bool fPrevLCD;
SkTriState fLCDState;
bool fPrevLCD;
SkTriState fAAState;
bool fPrevAA;
};
LCDTextDrawFilter::Mode cycle_lcdmode(LCDTextDrawFilter::Mode mode) {
static const LCDTextDrawFilter::Mode gCycle[] = {
/* kNeutral_Mode -> */ LCDTextDrawFilter::kForceOn_Mode,
/* kForceOn_Mode -> */ LCDTextDrawFilter::kForceOff_Mode,
/* kForceOff_Mode -> */ LCDTextDrawFilter::kNeutral_Mode
};
return gCycle[mode];
}
//////////////////////////////////////////////////////////////////////////////
#define MAX_ZOOM_LEVEL 8
@ -277,7 +291,9 @@ private:
SkTypeface* fTypeface;
bool fShowZoomer;
LCDTextDrawFilter::Mode fLCDMode;
SkTriState fLCDState;
SkTriState fAAState;
unsigned fFlipAxis;
int fScrollTestX, fScrollTestY;
@ -362,6 +378,7 @@ bool SampleWindow::make3DReady() {
#else
fGrContext = GrContext::Create(GrGpu::kOpenGL_Fixed_Engine, NULL);
#endif
SkDebugf("---- constructor\n");
}
if (NULL != fGrContext) {
@ -402,7 +419,9 @@ SampleWindow::SampleWindow(void* hwnd) : INHERITED(hwnd) {
fRotate = false;
fScale = false;
fRequestGrabImage = false;
fLCDMode = LCDTextDrawFilter::kNeutral_Mode;
fLCDState = kUnknown_SkTriState;
fAAState = kUnknown_SkTriState;
fFlipAxis = 0;
fScrollTestX = fScrollTestY = 0;
fMouseX = fMouseY = 0;
@ -495,10 +514,11 @@ void SampleWindow::draw(SkCanvas* canvas) {
gAnimTimePrev = gAnimTime;
gAnimTime = SkTime::GetMSecs();
SkScalar cx = SkScalarHalf(this->width());
SkScalar cy = SkScalarHalf(this->height());
if (fZoomLevel) {
SkMatrix m;
SkScalar cx = SkScalarHalf(this->width());
SkScalar cy = SkScalarHalf(this->height());
SkPoint center;
m = canvas->getTotalMatrix();//.invert(&m);
m.mapXY(cx, cy, &center);
@ -512,6 +532,19 @@ void SampleWindow::draw(SkCanvas* canvas) {
canvas->concat(m);
}
if (fFlipAxis) {
SkMatrix m;
m.setTranslate(cx, cy);
if (fFlipAxis & kFlipAxis_X) {
m.preScale(-SK_Scalar1, SK_Scalar1);
}
if (fFlipAxis & kFlipAxis_Y) {
m.preScale(SK_Scalar1, -SK_Scalar1);
}
m.preTranslate(-cx, -cy);
canvas->concat(m);
}
// Apply any gesture matrix
if (true) {
const SkMatrix& localM = fGesture.localM();
@ -776,6 +809,12 @@ void SampleWindow::afterChildren(SkCanvas* orig) {
delete fGpuCanvas;
fGpuCanvas = NULL;
presentGL();
#if 1
SkDebugf("---- destructor %d\n", fGrContext->refcnt());
fGrContext->unref();
fGrContext = NULL;
#endif
break;
#endif
}
@ -811,8 +850,9 @@ void SampleWindow::beforeChild(SkView* child, SkCanvas* canvas) {
canvas->translate(-cx, -cy);
}
if (LCDTextDrawFilter::kNeutral_Mode != fLCDMode) {
canvas->setDrawFilter(new LCDTextDrawFilter(fLCDMode))->unref();
if (kUnknown_SkTriState != fLCDState ||
kUnknown_SkTriState != fAAState) {
canvas->setDrawFilter(new FlagsDrawFilter(fLCDState, fAAState))->unref();
}
}
@ -988,7 +1028,12 @@ bool SampleWindow::onHandleChar(SkUnichar uni) {
this->inval(NULL);
break;
case 'l':
fLCDMode = cycle_lcdmode(fLCDMode);
fLCDState = cycle_tristate(fLCDState);
this->updateTitle();
this->inval(NULL);
break;
case 'b':
fAAState = cycle_tristate(fAAState);
this->updateTitle();
this->inval(NULL);
break;
@ -998,6 +1043,16 @@ bool SampleWindow::onHandleChar(SkUnichar uni) {
case 'o':
this->zoomOut();
break;
case 'x':
fFlipAxis ^= kFlipAxis_X;
this->updateTitle();
this->inval(NULL);
break;
case 'y':
fFlipAxis ^= kFlipAxis_Y;
this->updateTitle();
this->inval(NULL);
break;
case 'z':
this->toggleZoomer();
break;
@ -1167,6 +1222,16 @@ static const char* gCanvasTypePrefix[] = {
"opengl: "
};
static const char* trystate_str(SkTriState state,
const char trueStr[], const char falseStr[]) {
if (kTrue_SkTriState == state) {
return trueStr;
} else if (kFalse_SkTriState == state) {
return falseStr;
}
return NULL;
}
void SampleWindow::updateTitle() {
SkString title;
@ -1197,11 +1262,11 @@ void SampleWindow::updateTitle() {
if (fNClip) {
title.prepend("<C> ");
}
if (LCDTextDrawFilter::kForceOn_Mode == fLCDMode) {
title.prepend("LCD ");
} else if (LCDTextDrawFilter::kForceOff_Mode == fLCDMode) {
title.prepend("lcd ");
}
title.prepend(trystate_str(fLCDState, "LCD ", "lcd "));
title.prepend(trystate_str(fAAState, "AA ", "aa "));
title.prepend(fFlipAxis & kFlipAxis_X ? "X " : NULL);
title.prepend(fFlipAxis & kFlipAxis_Y ? "Y " : NULL);
if (fZoomLevel) {
title.prependf("{%d} ", fZoomLevel);