SkSurface* SkSurface_Gpu::onNewSurface(const SkImageInfo& info) {
GrRenderTarget* rt = fDevice->accessRenderTarget();
int sampleCount = rt->numSamples();
// TODO: Make caller specify this (change virtual signature of onNewSurface).
static const Budgeted kBudgeted = kNo_Budgeted;
return SkSurface::NewRenderTarget(fDevice->context(), kBudgeted, info, sampleCount,
&this->props());
}
////////////////////////////////////////////////////////////////////////////////
// sort out what kind of clip mask needs to be created: alpha, stencil,
// scissor, or entirely software
bool GrClipMaskManager::setupClipping(const GrClipData* clipDataIn) {
fCurrClipMaskType = kNone_ClipMaskType;
GrDrawState* drawState = fGpu->drawState();
if (!drawState->isClipState() || clipDataIn->fClipStack->isWideOpen()) {
fGpu->disableScissor();
this->setGpuStencil();
return true;
}
GrRenderTarget* rt = drawState->getRenderTarget();
// GrDrawTarget should have filtered this for us
GrAssert(NULL != rt);
GrIRect devClipBounds;
bool isIntersectionOfRects = false;
clipDataIn->getConservativeBounds(rt, &devClipBounds, &isIntersectionOfRects);
if (devClipBounds.isEmpty()) {
return false;
}
#if GR_SW_CLIP
bool requiresAA = requires_AA(*clipDataIn->fClipStack);
// If MSAA is enabled we can do everything in the stencil buffer.
// Otherwise check if we should just create the entire clip mask
// in software (this will only happen if the clip mask is anti-aliased
// and too complex for the gpu to handle in its entirety)
if (0 == rt->numSamples() &&
requiresAA &&
this->useSWOnlyPath(*clipDataIn->fClipStack)) {
// The clip geometry is complex enough that it will be more
// efficient to create it entirely in software
GrTexture* result = NULL;
GrIRect devBound;
if (this->createSoftwareClipMask(*clipDataIn, &result, &devBound)) {
setup_drawstate_aaclip(fGpu, result, devBound);
fGpu->disableScissor();
this->setGpuStencil();
return true;
}
// if SW clip mask creation fails fall through to the other
// two possible methods (bottoming out at stencil clipping)
}
#endif // GR_SW_CLIP
#if GR_AA_CLIP
// If MSAA is enabled use the (faster) stencil path for AA clipping
// otherwise the alpha clip mask is our only option
if (0 == rt->numSamples() && requiresAA) {
// Since we are going to create a destination texture of the correct
// size for the mask (rather than being bound by the size of the
// render target) we aren't going to use scissoring like the stencil
// path does (see scissorSettings below)
GrTexture* result = NULL;
GrIRect devBound;
if (this->createAlphaClipMask(*clipDataIn, &result, &devBound)) {
setup_drawstate_aaclip(fGpu, result, devBound);
fGpu->disableScissor();
this->setGpuStencil();
return true;
}
// if alpha clip mask creation fails fall through to the stencil
// buffer method
}
#endif // GR_AA_CLIP
// Either a hard (stencil buffer) clip was explicitly requested or
// an antialiased clip couldn't be created. In either case, free up
// the texture in the antialiased mask cache.
// TODO: this may require more investigation. Ganesh performs a lot of
// utility draws (e.g., clears, InOrderDrawBuffer playbacks) that hit
// the stencil buffer path. These may be "incorrectly" clearing the
// AA cache.
fAACache.reset();
// If the clip is a rectangle then just set the scissor. Otherwise, create
// a stencil mask.
if (isIntersectionOfRects) {
fGpu->enableScissor(devClipBounds);
this->setGpuStencil();
return true;
}
// use the stencil clip if we can't represent the clip as a rectangle.
bool useStencil = !clipDataIn->fClipStack->isWideOpen() &&
!devClipBounds.isEmpty();
if (useStencil) {
this->createStencilClipMask(*clipDataIn, devClipBounds);
}
// This must occur after createStencilClipMask. That function may change
// the scissor. Also, it only guarantees that the stencil mask is correct
// within the bounds it was passed, so we must use both stencil and scissor
// test to the bounds for the final draw.
fGpu->enableScissor(devClipBounds);
this->setGpuStencil();
return true;
}
////////////////////////////////////////////////////////////////////////////////
// sort out what kind of clip mask needs to be created: alpha, stencil,
// scissor, or entirely software
bool GrClipMaskManager::createClipMask(GrGpu* gpu,
const GrClip& clipIn,
ScissoringSettings* scissorSettings) {
GrAssert(scissorSettings);
scissorSettings->fEnableScissoring = false;
fClipMaskInStencil = false;
fClipMaskInAlpha = false;
GrDrawState* drawState = gpu->drawState();
if (!drawState->isClipState()) {
return true;
}
GrRenderTarget* rt = drawState->getRenderTarget();
// GrDrawTarget should have filtered this for us
GrAssert(NULL != rt);
#if GR_SW_CLIP
if (create_mask_in_sw()) {
// The clip geometry is complex enough that it will be more
// efficient to create it entirely in software
GrTexture* result = NULL;
GrIRect bound;
if (this->createSoftwareClipMask(gpu, clipIn, &result, &bound)) {
fClipMaskInAlpha = true;
setup_drawstate_aaclip(gpu, result, bound);
return true;
}
}
#endif
#if GR_AA_CLIP
// If MSAA is enabled use the (faster) stencil path for AA clipping
// otherwise the alpha clip mask is our only option
if (clipIn.requiresAA() && 0 == rt->numSamples()) {
// Since we are going to create a destination texture of the correct
// size for the mask (rather than being bound by the size of the
// render target) we aren't going to use scissoring like the stencil
// path does (see scissorSettings below)
GrTexture* result = NULL;
GrIRect bound;
if (this->createAlphaClipMask(gpu, clipIn, &result, &bound)) {
fClipMaskInAlpha = true;
setup_drawstate_aaclip(gpu, result, bound);
return true;
}
// if alpha clip mask creation fails fall through to the stencil
// buffer method
}
#endif // GR_AA_CLIP
GrRect bounds;
GrRect rtRect;
rtRect.setLTRB(0, 0,
GrIntToScalar(rt->width()), GrIntToScalar(rt->height()));
if (clipIn.hasConservativeBounds()) {
bounds = clipIn.getConservativeBounds();
if (!bounds.intersect(rtRect)) {
bounds.setEmpty();
}
} else {
bounds = rtRect;
}
bounds.roundOut(&scissorSettings->fScissorRect);
if (scissorSettings->fScissorRect.isEmpty()) {
scissorSettings->fScissorRect.setLTRB(0,0,0,0);
// TODO: I think we can do an early exit here - after refactoring try:
// set fEnableScissoring to true but leave fClipMaskInStencil false
// and return - everything is going to be scissored away anyway!
}
scissorSettings->fEnableScissoring = true;
// use the stencil clip if we can't represent the clip as a rectangle.
fClipMaskInStencil = !clipIn.isRect() && !clipIn.isEmpty() &&
!bounds.isEmpty();
if (fClipMaskInStencil) {
return this->createStencilClipMask(gpu, clipIn, bounds, scissorSettings);
}
return true;
}
////////////////////////////////////////////////////////////////////////////////
// sort out what kind of clip mask needs to be created: alpha, stencil,
// scissor, or entirely software
bool GrClipMaskManager::setupClipping(GrPipelineBuilder* pipelineBuilder,
GrPipelineBuilder::AutoRestoreFragmentProcessors* arfp,
GrPipelineBuilder::AutoRestoreStencil* ars,
GrScissorState* scissorState,
const SkRect* devBounds) {
fCurrClipMaskType = kNone_ClipMaskType;
if (kRespectClip_StencilClipMode == fClipMode) {
fClipMode = kIgnoreClip_StencilClipMode;
}
GrReducedClip::ElementList elements(16);
int32_t genID = 0;
GrReducedClip::InitialState initialState = GrReducedClip::kAllIn_InitialState;
SkIRect clipSpaceIBounds;
bool requiresAA = false;
GrRenderTarget* rt = pipelineBuilder->getRenderTarget();
// GrDrawTarget should have filtered this for us
SkASSERT(rt);
SkIRect clipSpaceRTIBounds = SkIRect::MakeWH(rt->width(), rt->height());
const GrClip& clip = pipelineBuilder->clip();
if (clip.isWideOpen(clipSpaceRTIBounds)) {
this->setPipelineBuilderStencil(pipelineBuilder, ars);
return true;
}
// The clip mask manager always draws with a single IRect so we special case that logic here
// Image filters just use a rect, so we also special case that logic
switch (clip.clipType()) {
case GrClip::kWideOpen_ClipType:
SkFAIL("Should have caught this with clip.isWideOpen()");
return true;
case GrClip::kIRect_ClipType: {
SkIRect scissor = clip.irect();
if (scissor.intersect(clipSpaceRTIBounds)) {
scissorState->set(scissor);
this->setPipelineBuilderStencil(pipelineBuilder, ars);
return true;
}
return false;
}
case GrClip::kClipStack_ClipType: {
clipSpaceRTIBounds.offset(clip.origin());
GrReducedClip::ReduceClipStack(*clip.clipStack(),
clipSpaceRTIBounds,
&elements,
&genID,
&initialState,
&clipSpaceIBounds,
&requiresAA);
if (elements.isEmpty()) {
if (GrReducedClip::kAllIn_InitialState == initialState) {
if (clipSpaceIBounds == clipSpaceRTIBounds) {
this->setPipelineBuilderStencil(pipelineBuilder, ars);
return true;
}
} else {
return false;
}
}
}
break;
}
// An element count of 4 was chosen because of the common pattern in Blink of:
// isect RR
// diff RR
// isect convex_poly
// isect convex_poly
// when drawing rounded div borders. This could probably be tuned based on a
// configuration's relative costs of switching RTs to generate a mask vs
// longer shaders.
if (elements.count() <= 4) {
SkVector clipToRTOffset = { SkIntToScalar(-clip.origin().fX),
SkIntToScalar(-clip.origin().fY)
};
if (elements.isEmpty() ||
(requiresAA && this->installClipEffects(pipelineBuilder, arfp, elements, clipToRTOffset,
devBounds))) {
SkIRect scissorSpaceIBounds(clipSpaceIBounds);
scissorSpaceIBounds.offset(-clip.origin());
if (NULL == devBounds ||
!SkRect::Make(scissorSpaceIBounds).contains(*devBounds)) {
scissorState->set(scissorSpaceIBounds);
}
this->setPipelineBuilderStencil(pipelineBuilder, ars);
return true;
}
}
// If MSAA is enabled we can do everything in the stencil buffer.
if (0 == rt->numSamples() && requiresAA) {
GrTexture* result = NULL;
// The top-left of the mask corresponds to the top-left corner of the bounds.
SkVector clipToMaskOffset = {
SkIntToScalar(-clipSpaceIBounds.fLeft),
SkIntToScalar(-clipSpaceIBounds.fTop)
};
if (this->useSWOnlyPath(pipelineBuilder, clipToMaskOffset, elements)) {
// The clip geometry is complex enough that it will be more efficient to create it
// entirely in software
result = this->createSoftwareClipMask(genID,
initialState,
elements,
clipToMaskOffset,
clipSpaceIBounds);
} else {
result = this->createAlphaClipMask(genID,
initialState,
elements,
clipToMaskOffset,
clipSpaceIBounds);
}
if (result) {
arfp->set(pipelineBuilder);
// The mask's top left coord should be pinned to the rounded-out top left corner of
// clipSpace bounds. We determine the mask's position WRT to the render target here.
SkIRect rtSpaceMaskBounds = clipSpaceIBounds;
rtSpaceMaskBounds.offset(-clip.origin());
setup_drawstate_aaclip(pipelineBuilder, result, arfp, rtSpaceMaskBounds);
this->setPipelineBuilderStencil(pipelineBuilder, ars);
return true;
}
// if alpha clip mask creation fails fall through to the non-AA code paths
}
// Either a hard (stencil buffer) clip was explicitly requested or an anti-aliased clip couldn't
// be created. In either case, free up the texture in the anti-aliased mask cache.
// TODO: this may require more investigation. Ganesh performs a lot of utility draws (e.g.,
// clears, InOrderDrawBuffer playbacks) that hit the stencil buffer path. These may be
// "incorrectly" clearing the AA cache.
fAACache.reset();
// use the stencil clip if we can't represent the clip as a rectangle.
SkIPoint clipSpaceToStencilSpaceOffset = -clip.origin();
this->createStencilClipMask(rt,
genID,
initialState,
elements,
clipSpaceIBounds,
clipSpaceToStencilSpaceOffset);
// This must occur after createStencilClipMask. That function may change the scissor. Also, it
// only guarantees that the stencil mask is correct within the bounds it was passed, so we must
// use both stencil and scissor test to the bounds for the final draw.
SkIRect scissorSpaceIBounds(clipSpaceIBounds);
scissorSpaceIBounds.offset(clipSpaceToStencilSpaceOffset);
scissorState->set(scissorSpaceIBounds);
this->setPipelineBuilderStencil(pipelineBuilder, ars);
return true;
}
////////////////////////////////////////////////////////////////////////////////
// sort out what kind of clip mask needs to be created: alpha, stencil,
// scissor, or entirely software
bool GrClipMaskManager::createClipMask(GrGpu* gpu,
const GrClip& clipIn,
ScissoringSettings* scissorSettings) {
GrAssert(scissorSettings);
scissorSettings->fEnableScissoring = false;
fClipMaskInStencil = false;
fClipMaskInAlpha = false;
GrDrawState* drawState = gpu->drawState();
if (!drawState->isClipState()) {
return true;
}
GrRenderTarget* rt = drawState->getRenderTarget();
// GrDrawTarget should have filtered this for us
GrAssert(NULL != rt);
#if GR_SW_CLIP
// If MSAA is enabled we can do everything in the stencil buffer.
// Otherwise check if we should just create the entire clip mask
// in software (this will only happen if the clip mask is anti-aliased
// and too complex for the gpu to handle in its entirety)
if (0 == rt->numSamples() && useSWOnlyPath(gpu, clipIn)) {
// The clip geometry is complex enough that it will be more
// efficient to create it entirely in software
GrTexture* result = NULL;
GrIRect bound;
if (this->createSoftwareClipMask(gpu, clipIn, &result, &bound)) {
fClipMaskInAlpha = true;
setup_drawstate_aaclip(gpu, result, bound);
return true;
}
// if SW clip mask creation fails fall through to the other
// two possible methods (bottoming out at stencil clipping)
}
#endif // GR_SW_CLIP
#if GR_AA_CLIP
// If MSAA is enabled use the (faster) stencil path for AA clipping
// otherwise the alpha clip mask is our only option
if (0 == rt->numSamples() && clipIn.requiresAA()) {
// Since we are going to create a destination texture of the correct
// size for the mask (rather than being bound by the size of the
// render target) we aren't going to use scissoring like the stencil
// path does (see scissorSettings below)
GrTexture* result = NULL;
GrIRect bound;
if (this->createAlphaClipMask(gpu, clipIn, &result, &bound)) {
fClipMaskInAlpha = true;
setup_drawstate_aaclip(gpu, result, bound);
return true;
}
// if alpha clip mask creation fails fall through to the stencil
// buffer method
}
#endif // GR_AA_CLIP
// Either a hard (stencil buffer) clip was explicitly requested or
// an antialiased clip couldn't be created. In either case, free up
// the texture in the antialiased mask cache.
// TODO: this may require more investigation. Ganesh performs a lot of
// utility draws (e.g., clears, InOrderDrawBuffer playbacks) that hit
// the stencil buffer path. These may be "incorrectly" clearing the
// AA cache.
fAACache.reset();
GrRect bounds;
GrRect rtRect;
rtRect.setLTRB(0, 0,
GrIntToScalar(rt->width()), GrIntToScalar(rt->height()));
if (clipIn.hasConservativeBounds()) {
bounds = clipIn.getConservativeBounds();
if (!bounds.intersect(rtRect)) {
bounds.setEmpty();
}
} else {
bounds = rtRect;
}
bounds.roundOut(&scissorSettings->fScissorRect);
if (scissorSettings->fScissorRect.isEmpty()) {
scissorSettings->fScissorRect.setLTRB(0,0,0,0);
// TODO: I think we can do an early exit here - after refactoring try:
// set fEnableScissoring to true but leave fClipMaskInStencil false
// and return - everything is going to be scissored away anyway!
}
scissorSettings->fEnableScissoring = true;
// use the stencil clip if we can't represent the clip as a rectangle.
fClipMaskInStencil = !clipIn.isRect() && !clipIn.isEmpty() &&
!bounds.isEmpty();
if (fClipMaskInStencil) {
return this->createStencilClipMask(gpu, clipIn, bounds, scissorSettings);
}
return true;
}