bool GrGpu::setupClipAndFlushState(GrPrimitiveType type) {
const GrIRect* r = NULL;
GrIRect clipRect;
GrDrawState* drawState = this->drawState();
const GrRenderTarget* rt = drawState->getRenderTarget();
// GrDrawTarget should have filtered this for us
GrAssert(NULL != rt);
if (drawState->isClipState()) {
GrRect bounds;
GrRect rtRect;
rtRect.setLTRB(0, 0,
GrIntToScalar(rt->width()), GrIntToScalar(rt->height()));
if (fClip.hasConservativeBounds()) {
bounds = fClip.getConservativeBounds();
if (!bounds.intersect(rtRect)) {
bounds.setEmpty();
}
} else {
bounds = rtRect;
}
bounds.roundOut(&clipRect);
if (clipRect.isEmpty()) {
clipRect.setLTRB(0,0,0,0);
}
r = &clipRect;
// use the stencil clip if we can't represent the clip as a rectangle.
fClipInStencil = !fClip.isRect() && !fClip.isEmpty() &&
!bounds.isEmpty();
// TODO: dynamically attach a SB when needed.
GrStencilBuffer* stencilBuffer = rt->getStencilBuffer();
if (fClipInStencil && NULL == stencilBuffer) {
return false;
}
if (fClipInStencil &&
stencilBuffer->mustRenderClip(fClip, rt->width(), rt->height())) {
stencilBuffer->setLastClip(fClip, rt->width(), rt->height());
// we set the current clip to the bounds so that our recursive
// draws are scissored to them. We use the copy of the complex clip
// we just stashed on the SB to render from. We set it back after
// we finish drawing it into the stencil.
const GrClip& clip = stencilBuffer->getLastClip();
fClip.setFromRect(bounds);
AutoStateRestore asr(this);
AutoGeometryPush agp(this);
drawState->setViewMatrix(GrMatrix::I());
this->flushScissor(NULL);
#if !VISUALIZE_COMPLEX_CLIP
drawState->enableState(GrDrawState::kNoColorWrites_StateBit);
#else
drawState->disableState(GrDrawState::kNoColorWrites_StateBit);
#endif
int count = clip.getElementCount();
int clipBit = stencilBuffer->bits();
SkASSERT((clipBit <= 16) &&
"Ganesh only handles 16b or smaller stencil buffers");
clipBit = (1 << (clipBit-1));
bool clearToInside;
GrSetOp startOp = kReplace_SetOp; // suppress warning
int start = process_initial_clip_elements(clip,
rtRect,
&clearToInside,
&startOp);
this->clearStencilClip(clipRect, clearToInside);
// walk through each clip element and perform its set op
// with the existing clip.
for (int c = start; c < count; ++c) {
GrPathFill fill;
bool fillInverted;
// enabled at bottom of loop
drawState->disableState(kModifyStencilClip_StateBit);
bool canRenderDirectToStencil; // can the clip element be drawn
// directly to the stencil buffer
// with a non-inverted fill rule
// without extra passes to
// resolve in/out status.
GrPathRenderer* pr = NULL;
const GrPath* clipPath = NULL;
GrPathRenderer::AutoClearPath arp;
if (kRect_ClipType == clip.getElementType(c)) {
canRenderDirectToStencil = true;
fill = kEvenOdd_PathFill;
fillInverted = false;
// there is no point in intersecting a screen filling
// rectangle.
if (kIntersect_SetOp == clip.getOp(c) &&
clip.getRect(c).contains(rtRect)) {
continue;
}
} else {
fill = clip.getPathFill(c);
fillInverted = GrIsFillInverted(fill);
fill = GrNonInvertedFill(fill);
clipPath = &clip.getPath(c);
pr = this->getClipPathRenderer(*clipPath, fill);
if (NULL == pr) {
fClipInStencil = false;
fClip = clip;
return false;
}
canRenderDirectToStencil =
!pr->requiresStencilPass(this, *clipPath, fill);
arp.set(pr, this, clipPath, fill, false, NULL);
}
GrSetOp op = (c == start) ? startOp : clip.getOp(c);
int passes;
GrStencilSettings stencilSettings[GrStencilSettings::kMaxStencilClipPasses];
bool canDrawDirectToClip; // Given the renderer, the element,
// fill rule, and set operation can
// we render the element directly to
// stencil bit used for clipping.
canDrawDirectToClip =
GrStencilSettings::GetClipPasses(op,
canRenderDirectToStencil,
clipBit,
fillInverted,
&passes, stencilSettings);
// draw the element to the client stencil bits if necessary
if (!canDrawDirectToClip) {
GR_STATIC_CONST_SAME_STENCIL(gDrawToStencil,
kIncClamp_StencilOp,
kIncClamp_StencilOp,
kAlways_StencilFunc,
0xffff,
0x0000,
0xffff);
SET_RANDOM_COLOR
if (kRect_ClipType == clip.getElementType(c)) {
*drawState->stencil() = gDrawToStencil;
this->drawSimpleRect(clip.getRect(c), NULL, 0);
} else {
if (canRenderDirectToStencil) {
*drawState->stencil() = gDrawToStencil;
pr->drawPath(0);
} else {
pr->drawPathToStencil();
}
}
}
// now we modify the clip bit by rendering either the clip
// element directly or a bounding rect of the entire clip.
drawState->enableState(kModifyStencilClip_StateBit);
for (int p = 0; p < passes; ++p) {
*drawState->stencil() = stencilSettings[p];
if (canDrawDirectToClip) {
if (kRect_ClipType == clip.getElementType(c)) {
SET_RANDOM_COLOR
this->drawSimpleRect(clip.getRect(c), NULL, 0);
} else {
SET_RANDOM_COLOR
pr->drawPath(0);
}
} else {
SET_RANDOM_COLOR
this->drawSimpleRect(bounds, NULL, 0);
}
}
}
////////////////////////////////////////////////////////////////////////////////
// Create a 1-bit clip mask in the stencil buffer
bool GrClipMaskManager::createStencilClipMask(GrGpu* gpu,
const GrClip& clipIn,
const GrRect& bounds,
ScissoringSettings* scissorSettings) {
GrAssert(fClipMaskInStencil);
GrDrawState* drawState = gpu->drawState();
GrAssert(drawState->isClipState());
GrRenderTarget* rt = drawState->getRenderTarget();
GrAssert(NULL != rt);
// TODO: dynamically attach a SB when needed.
GrStencilBuffer* stencilBuffer = rt->getStencilBuffer();
if (NULL == stencilBuffer) {
return false;
}
if (stencilBuffer->mustRenderClip(clipIn, rt->width(), rt->height())) {
stencilBuffer->setLastClip(clipIn, rt->width(), rt->height());
// we set the current clip to the bounds so that our recursive
// draws are scissored to them. We use the copy of the complex clip
// we just stashed on the SB to render from. We set it back after
// we finish drawing it into the stencil.
const GrClip& clipCopy = stencilBuffer->getLastClip();
gpu->setClip(GrClip(bounds));
GrDrawTarget::AutoStateRestore asr(gpu, GrDrawTarget::kReset_ASRInit);
drawState = gpu->drawState();
drawState->setRenderTarget(rt);
GrDrawTarget::AutoGeometryPush agp(gpu);
gpu->disableScissor();
#if !VISUALIZE_COMPLEX_CLIP
drawState->enableState(GrDrawState::kNoColorWrites_StateBit);
#endif
int count = clipCopy.getElementCount();
int clipBit = stencilBuffer->bits();
SkASSERT((clipBit <= 16) &&
"Ganesh only handles 16b or smaller stencil buffers");
clipBit = (1 << (clipBit-1));
GrIRect rtRect = GrIRect::MakeWH(rt->width(), rt->height());
bool clearToInside;
SkRegion::Op startOp = SkRegion::kReplace_Op; // suppress warning
int start = process_initial_clip_elements(clipCopy,
rtRect,
&clearToInside,
&startOp);
gpu->clearStencilClip(scissorSettings->fScissorRect, clearToInside);
// walk through each clip element and perform its set op
// with the existing clip.
for (int c = start; c < count; ++c) {
GrPathFill fill;
bool fillInverted;
// enabled at bottom of loop
drawState->disableState(GrGpu::kModifyStencilClip_StateBit);
bool canRenderDirectToStencil; // can the clip element be drawn
// directly to the stencil buffer
// with a non-inverted fill rule
// without extra passes to
// resolve in/out status.
SkRegion::Op op = (c == start) ? startOp : clipCopy.getOp(c);
GrPathRenderer* pr = NULL;
const SkPath* clipPath = NULL;
if (kRect_ClipType == clipCopy.getElementType(c)) {
canRenderDirectToStencil = true;
fill = kEvenOdd_PathFill;
fillInverted = false;
// there is no point in intersecting a screen filling
// rectangle.
if (SkRegion::kIntersect_Op == op &&
contains(clipCopy.getRect(c), rtRect)) {
continue;
}
} else {
fill = clipCopy.getPathFill(c);
fillInverted = GrIsFillInverted(fill);
fill = GrNonInvertedFill(fill);
clipPath = &clipCopy.getPath(c);
pr = this->getClipPathRenderer(gpu, *clipPath, fill, false);
if (NULL == pr) {
fClipMaskInStencil = false;
gpu->setClip(clipCopy); // restore to the original
return false;
}
canRenderDirectToStencil =
!pr->requiresStencilPass(*clipPath, fill, gpu);
}
int passes;
GrStencilSettings stencilSettings[GrStencilSettings::kMaxStencilClipPasses];
bool canDrawDirectToClip; // Given the renderer, the element,
// fill rule, and set operation can
// we render the element directly to
// stencil bit used for clipping.
canDrawDirectToClip =
GrStencilSettings::GetClipPasses(op,
canRenderDirectToStencil,
clipBit,
fillInverted,
&passes, stencilSettings);
// draw the element to the client stencil bits if necessary
if (!canDrawDirectToClip) {
GR_STATIC_CONST_SAME_STENCIL(gDrawToStencil,
kIncClamp_StencilOp,
kIncClamp_StencilOp,
kAlways_StencilFunc,
0xffff,
0x0000,
0xffff);
SET_RANDOM_COLOR
if (kRect_ClipType == clipCopy.getElementType(c)) {
*drawState->stencil() = gDrawToStencil;
gpu->drawSimpleRect(clipCopy.getRect(c), NULL, 0);
} else {
if (canRenderDirectToStencil) {
*drawState->stencil() = gDrawToStencil;
pr->drawPath(*clipPath, fill, NULL, gpu, 0, false);
} else {
pr->drawPathToStencil(*clipPath, fill, gpu);
}
}
}
// now we modify the clip bit by rendering either the clip
// element directly or a bounding rect of the entire clip.
drawState->enableState(GrGpu::kModifyStencilClip_StateBit);
for (int p = 0; p < passes; ++p) {
*drawState->stencil() = stencilSettings[p];
if (canDrawDirectToClip) {
if (kRect_ClipType == clipCopy.getElementType(c)) {
SET_RANDOM_COLOR
gpu->drawSimpleRect(clipCopy.getRect(c), NULL, 0);
} else {
SET_RANDOM_COLOR
pr->drawPath(*clipPath, fill, NULL, gpu, 0, false);
}
} else {
SET_RANDOM_COLOR
gpu->drawSimpleRect(bounds, NULL, 0);
}
}
}
////////////////////////////////////////////////////////////////////////////////
// Create a 1-bit clip mask in the stencil buffer. 'devClipBounds' are in device
// (as opposed to canvas) coordinates
bool GrClipMaskManager::createStencilClipMask(const GrClipData& clipDataIn,
const GrIRect& devClipBounds) {
GrAssert(kNone_ClipMaskType == fCurrClipMaskType);
GrDrawState* drawState = fGpu->drawState();
GrAssert(drawState->isClipState());
GrRenderTarget* rt = drawState->getRenderTarget();
GrAssert(NULL != rt);
// TODO: dynamically attach a SB when needed.
GrStencilBuffer* stencilBuffer = rt->getStencilBuffer();
if (NULL == stencilBuffer) {
return false;
}
if (stencilBuffer->mustRenderClip(clipDataIn, rt->width(), rt->height())) {
stencilBuffer->setLastClip(clipDataIn, rt->width(), rt->height());
// we set the current clip to the bounds so that our recursive
// draws are scissored to them. We use the copy of the complex clip
// we just stashed on the SB to render from. We set it back after
// we finish drawing it into the stencil.
const GrClipData* oldClipData = fGpu->getClip();
// The origin of 'newClipData' is (0, 0) so it is okay to place
// a device-coordinate bound in 'newClipStack'
SkClipStack newClipStack(devClipBounds);
GrClipData newClipData;
newClipData.fClipStack = &newClipStack;
fGpu->setClip(&newClipData);
GrDrawTarget::AutoStateRestore asr(fGpu, GrDrawTarget::kReset_ASRInit);
drawState = fGpu->drawState();
drawState->setRenderTarget(rt);
GrDrawTarget::AutoGeometryPush agp(fGpu);
if (0 != clipDataIn.fOrigin.fX || 0 != clipDataIn.fOrigin.fY) {
// Add the saveLayer's offset to the view matrix rather than
// offset each individual draw
drawState->viewMatrix()->setTranslate(
SkIntToScalar(-clipDataIn.fOrigin.fX),
SkIntToScalar(-clipDataIn.fOrigin.fY));
}
#if !VISUALIZE_COMPLEX_CLIP
drawState->enableState(GrDrawState::kNoColorWrites_StateBit);
#endif
int clipBit = stencilBuffer->bits();
SkASSERT((clipBit <= 16) &&
"Ganesh only handles 16b or smaller stencil buffers");
clipBit = (1 << (clipBit-1));
GrIRect devRTRect = GrIRect::MakeWH(rt->width(), rt->height());
bool clearToInside;
SkRegion::Op firstOp = SkRegion::kReplace_Op; // suppress warning
SkClipStack::Iter iter(*oldClipData->fClipStack,
SkClipStack::Iter::kBottom_IterStart);
const SkClipStack::Iter::Clip* clip = process_initial_clip_elements(&iter,
devRTRect,
&clearToInside,
&firstOp,
clipDataIn);
fGpu->clearStencilClip(devClipBounds, clearToInside);
bool first = true;
// walk through each clip element and perform its set op
// with the existing clip.
for ( ; NULL != clip; clip = iter.nextCombined()) {
GrPathFill fill;
bool fillInverted = false;
// enabled at bottom of loop
drawState->disableState(GrGpu::kModifyStencilClip_StateBit);
// if the target is MSAA then we want MSAA enabled when the clip is soft
if (rt->isMultisampled()) {
drawState->setState(GrDrawState::kHWAntialias_StateBit, clip->fDoAA);
}
// Can the clip element be drawn directly to the stencil buffer
// with a non-inverted fill rule without extra passes to
// resolve in/out status?
bool canRenderDirectToStencil = false;
SkRegion::Op op = clip->fOp;
if (first) {
first = false;
op = firstOp;
}
GrPathRenderer* pr = NULL;
const SkPath* clipPath = NULL;
if (NULL != clip->fRect) {
canRenderDirectToStencil = true;
fill = kEvenOdd_GrPathFill;
fillInverted = false;
// there is no point in intersecting a screen filling
// rectangle.
if (SkRegion::kIntersect_Op == op &&
contains(*clip->fRect, devRTRect, oldClipData->fOrigin)) {
continue;
}
} else {
GrAssert(NULL != clip->fPath);
fill = get_path_fill(*clip->fPath);
fillInverted = GrIsFillInverted(fill);
fill = GrNonInvertedFill(fill);
clipPath = clip->fPath;
pr = this->getContext()->getPathRenderer(*clipPath, fill, fGpu, false, true);
if (NULL == pr) {
fGpu->setClip(oldClipData);
return false;
}
canRenderDirectToStencil =
!pr->requiresStencilPass(*clipPath, fill, fGpu);
}
int passes;
GrStencilSettings stencilSettings[GrStencilSettings::kMaxStencilClipPasses];
bool canDrawDirectToClip; // Given the renderer, the element,
// fill rule, and set operation can
// we render the element directly to
// stencil bit used for clipping.
canDrawDirectToClip =
GrStencilSettings::GetClipPasses(op,
canRenderDirectToStencil,
clipBit,
fillInverted,
&passes,
stencilSettings);
// draw the element to the client stencil bits if necessary
if (!canDrawDirectToClip) {
GR_STATIC_CONST_SAME_STENCIL(gDrawToStencil,
kIncClamp_StencilOp,
kIncClamp_StencilOp,
kAlways_StencilFunc,
0xffff,
0x0000,
0xffff);
SET_RANDOM_COLOR
if (NULL != clip->fRect) {
*drawState->stencil() = gDrawToStencil;
fGpu->drawSimpleRect(*clip->fRect, NULL);
} else {
if (canRenderDirectToStencil) {
*drawState->stencil() = gDrawToStencil;
pr->drawPath(*clipPath, fill, fGpu, false);
} else {
pr->drawPathToStencil(*clipPath, fill, fGpu);
}
}
}
// now we modify the clip bit by rendering either the clip
// element directly or a bounding rect of the entire clip.
drawState->enableState(GrGpu::kModifyStencilClip_StateBit);
for (int p = 0; p < passes; ++p) {
*drawState->stencil() = stencilSettings[p];
if (canDrawDirectToClip) {
if (NULL != clip->fRect) {
SET_RANDOM_COLOR
fGpu->drawSimpleRect(*clip->fRect, NULL);
} else {
SET_RANDOM_COLOR
pr->drawPath(*clipPath, fill, fGpu, false);
}
} else {
SET_RANDOM_COLOR
// 'devClipBounds' is already in device coordinates so the
// translation in the view matrix is inappropriate.
// Convert it to canvas space so the drawn rect will
// be in the correct location
GrRect canvClipBounds;
canvClipBounds.set(devClipBounds);
device_to_canvas(&canvClipBounds, clipDataIn.fOrigin);
fGpu->drawSimpleRect(canvClipBounds, NULL);
}
}
}
bool GrGpu::setupClipAndFlushState(GrPrimitiveType type) {
const GrIRect* r = NULL;
GrIRect clipRect;
// we check this early because we need a valid
// render target to setup stencil clipping
// before even going into flushGraphicsState
if (NULL == fCurrDrawState.fRenderTarget) {
GrAssert(!"No render target bound.");
return false;
}
if (fCurrDrawState.fFlagBits & kClip_StateBit) {
GrRenderTarget& rt = *fCurrDrawState.fRenderTarget;
GrRect bounds;
GrRect rtRect;
rtRect.setLTRB(0, 0,
GrIntToScalar(rt.width()), GrIntToScalar(rt.height()));
if (fClip.hasConservativeBounds()) {
bounds = fClip.getConservativeBounds();
bounds.intersectWith(rtRect);
} else {
bounds = rtRect;
}
bounds.roundOut(&clipRect);
if (clipRect.isEmpty()) {
clipRect.setLTRB(0,0,0,0);
}
r = &clipRect;
fClipState.fClipInStencil = !fClip.isRect() &&
!fClip.isEmpty() &&
!bounds.isEmpty();
if (fClipState.fClipInStencil &&
(fClipState.fClipIsDirty ||
fClip != rt.fLastStencilClip)) {
rt.fLastStencilClip = fClip;
// we set the current clip to the bounds so that our recursive
// draws are scissored to them. We use the copy of the complex clip
// in the rt to render
const GrClip& clip = rt.fLastStencilClip;
fClip.setFromRect(bounds);
AutoStateRestore asr(this);
AutoInternalDrawGeomRestore aidgr(this);
this->setViewMatrix(GrMatrix::I());
this->eraseStencilClip(clipRect);
this->flushScissor(NULL);
#if !VISUALIZE_COMPLEX_CLIP
this->enableState(kNoColorWrites_StateBit);
#else
this->disableState(kNoColorWrites_StateBit);
#endif
int count = clip.getElementCount();
int clipBit = rt.stencilBits();
clipBit = (1 << (clipBit-1));
// often we'll see the first two elements of the clip are
// the full rt size and another element intersected with it.
// We can skip the first full-size rect and save a big rect draw.
int firstElement = 0;
if (clip.getElementCount() > 1 &&
kRect_ClipType == clip.getElementType(0) &&
kIntersect_SetOp == clip.getOp(1)&&
clip.getRect(0).contains(bounds)) {
firstElement = 1;
}
// walk through each clip element and perform its set op
// with the existing clip.
for (int c = firstElement; c < count; ++c) {
GrPathFill fill;
// enabled at bottom of loop
this->disableState(kModifyStencilClip_StateBit);
bool canDrawDirectToClip;
if (kRect_ClipType == clip.getElementType(c)) {
canDrawDirectToClip = true;
fill = kEvenOdd_PathFill;
} else {
fill = clip.getPathFill(c);
GrPathRenderer* pr = this->getPathRenderer();
canDrawDirectToClip = pr->requiresStencilPass(this, clip.getPath(c), fill);
}
GrSetOp op = firstElement == c ? kReplace_SetOp : clip.getOp(c);
int passes;
GrStencilSettings stencilSettings[GrStencilSettings::kMaxStencilClipPasses];
canDrawDirectToClip = GrStencilSettings::GetClipPasses(op, canDrawDirectToClip,
clipBit, IsFillInverted(fill),
&passes, stencilSettings);
// draw the element to the client stencil bits if necessary
if (!canDrawDirectToClip) {
if (kRect_ClipType == clip.getElementType(c)) {
static const GrStencilSettings gDrawToStencil = {
kIncClamp_StencilOp, kIncClamp_StencilOp,
kIncClamp_StencilOp, kIncClamp_StencilOp,
kAlways_StencilFunc, kAlways_StencilFunc,
0xffffffff, 0xffffffff,
0x00000000, 0x00000000,
0xffffffff, 0xffffffff,
};
this->setStencil(gDrawToStencil);
SET_RANDOM_COLOR
this->drawSimpleRect(clip.getRect(c), NULL, 0);
} else {
SET_RANDOM_COLOR
getPathRenderer()->drawPathToStencil(this, clip.getPath(c),
NonInvertedFill(fill),
NULL);
}
}
// now we modify the clip bit by rendering either the clip
// element directly or a bounding rect of the entire clip.
this->enableState(kModifyStencilClip_StateBit);
for (int p = 0; p < passes; ++p) {
this->setStencil(stencilSettings[p]);
if (canDrawDirectToClip) {
if (kRect_ClipType == clip.getElementType(c)) {
SET_RANDOM_COLOR
this->drawSimpleRect(clip.getRect(c), NULL, 0);
} else {
SET_RANDOM_COLOR
getPathRenderer()->drawPath(this, 0,
clip.getPath(c),
fill, NULL);
}
} else {
SET_RANDOM_COLOR
this->drawSimpleRect(bounds, 0, NULL);
}
}
}
fClip = clip;
// recusive draws would have disabled this.
fClipState.fClipInStencil = true;
}
fClipState.fClipIsDirty = false;
}
// Must flush the scissor after graphics state
if (!this->flushGraphicsState(type)) {
return false;
}
this->flushScissor(r);
return true;
}