bool GrSWMaskHelper::init(const GrIRect& resultBounds,
const SkMatrix* matrix) {
if (NULL != matrix) {
fMatrix = *matrix;
} else {
fMatrix.setIdentity();
}
// Now translate so the bound's UL corner is at the origin
fMatrix.postTranslate(-resultBounds.fLeft * SK_Scalar1,
-resultBounds.fTop * SK_Scalar1);
GrIRect bounds = GrIRect::MakeWH(resultBounds.width(),
resultBounds.height());
fBM.setConfig(SkBitmap::kA8_Config, bounds.fRight, bounds.fBottom);
if (!fBM.allocPixels()) {
return false;
}
sk_bzero(fBM.getPixels(), fBM.getSafeSize());
sk_bzero(&fDraw, sizeof(fDraw));
fRasterClip.setRect(bounds);
fDraw.fRC = &fRasterClip;
fDraw.fClip = &fRasterClip.bwRgn();
fDraw.fMatrix = &fMatrix;
fDraw.fBitmap = &fBM;
return true;
}
void GrSWMaskHelper::DrawToTargetWithPathMask(GrTexture* texture,
GrDrawTarget* target,
const GrIRect& rect) {
GrDrawState* drawState = target->drawState();
GrDrawState::AutoDeviceCoordDraw adcd(drawState);
if (!adcd.succeeded()) {
return;
}
enum {
// the SW path renderer shares this stage with glyph
// rendering (kGlyphMaskStage in GrBatchedTextContext)
kPathMaskStage = GrPaint::kTotalStages,
};
GrAssert(!drawState->isStageEnabled(kPathMaskStage));
drawState->stage(kPathMaskStage)->reset();
drawState->createTextureEffect(kPathMaskStage, texture);
SkScalar w = SkIntToScalar(rect.width());
SkScalar h = SkIntToScalar(rect.height());
GrRect maskRect = GrRect::MakeWH(w / texture->width(),
h / texture->height());
const GrRect* srcRects[GrDrawState::kNumStages] = { NULL };
srcRects[kPathMaskStage] = &maskRect;
GrRect dstRect = GrRect::MakeLTRB(
SK_Scalar1 * rect.fLeft,
SK_Scalar1 * rect.fTop,
SK_Scalar1 * rect.fRight,
SK_Scalar1 * rect.fBottom);
target->drawRect(dstRect, NULL, srcRects, NULL);
drawState->disableStage(kPathMaskStage);
}
bool GrSWMaskHelper::init(const GrIRect& pathDevBounds, const GrPoint* translate) {
fMatrix = fContext->getMatrix();
if (NULL != translate) {
fMatrix.postTranslate(translate->fX, translate->fY);
}
fMatrix.postTranslate(-pathDevBounds.fLeft * SK_Scalar1,
-pathDevBounds.fTop * SK_Scalar1);
GrIRect bounds = GrIRect::MakeWH(pathDevBounds.width(),
pathDevBounds.height());
fBM.setConfig(SkBitmap::kA8_Config, bounds.fRight, bounds.fBottom);
if (!fBM.allocPixels()) {
return false;
}
sk_bzero(fBM.getPixels(), fBM.getSafeSize());
sk_bzero(&fDraw, sizeof(fDraw));
fRasterClip.setRect(bounds);
fDraw.fRC = &fRasterClip;
fDraw.fClip = &fRasterClip.bwRgn();
fDraw.fMatrix = &fMatrix;
fDraw.fBitmap = &fBM;
return true;
}
////////////////////////////////////////////////////////////////////////////////
// Shared preamble between gpu and SW-only AA clip mask creation paths.
// Handles caching, determination of clip mask bound & allocation (if needed)
// of the result texture
// Returns true if there is no more work to be done (i.e., we got a cache hit)
bool GrClipMaskManager::clipMaskPreamble(GrGpu* gpu,
const GrClip& clipIn,
GrTexture** result,
GrIRect *resultBounds) {
GrDrawState* origDrawState = gpu->drawState();
GrAssert(origDrawState->isClipState());
GrRenderTarget* rt = origDrawState->getRenderTarget();
GrAssert(NULL != rt);
GrRect rtRect;
rtRect.setLTRB(0, 0,
GrIntToScalar(rt->width()), GrIntToScalar(rt->height()));
// unlike the stencil path the alpha path is not bound to the size of the
// render target - determine the minimum size required for the mask
GrRect bounds;
if (clipIn.hasConservativeBounds()) {
bounds = clipIn.getConservativeBounds();
if (!bounds.intersect(rtRect)) {
// the mask will be empty in this case
GrAssert(false);
bounds.setEmpty();
}
} else {
// still locked to the size of the render target
bounds = rtRect;
}
GrIRect intBounds;
bounds.roundOut(&intBounds);
// need to outset a pixel since the standard bounding box computation
// path doesn't leave any room for antialiasing (esp. w.r.t. rects)
intBounds.outset(1, 1);
// TODO: make sure we don't outset if bounds are still 0,0 @ min
if (fAACache.canReuse(clipIn,
intBounds.width(),
intBounds.height())) {
*result = fAACache.getLastMask();
fAACache.getLastBound(resultBounds);
return true;
}
this->setupCache(clipIn, intBounds);
*resultBounds = intBounds;
return false;
}
void GrClipMaskManager::setupCache(const SkClipStack& clipIn,
const GrIRect& bounds) {
// Since we are setting up the cache we know the last lookup was a miss
// Free up the currently cached mask so it can be reused
fAACache.reset();
GrTextureDesc desc;
desc.fFlags = kRenderTarget_GrTextureFlagBit|kNoStencil_GrTextureFlagBit;
desc.fWidth = bounds.width();
desc.fHeight = bounds.height();
desc.fConfig = kAlpha_8_GrPixelConfig;
fAACache.acquireMask(clipIn, desc, bounds);
}
// get a texture to act as a temporary buffer for AA clip boolean operations
// TODO: given the expense of createTexture we may want to just cache this too
void GrClipMaskManager::getTemp(const GrIRect& bounds,
GrAutoScratchTexture* temp) {
if (NULL != temp->texture()) {
// we've already allocated the temp texture
return;
}
GrTextureDesc desc;
desc.fFlags = kRenderTarget_GrTextureFlagBit|kNoStencil_GrTextureFlagBit;
desc.fWidth = bounds.width();
desc.fHeight = bounds.height();
desc.fConfig = kAlpha_8_GrPixelConfig;
temp->set(this->getContext(), desc);
}
void GrClipMaskManager::setupCache(const GrClip& clipIn,
const GrIRect& bounds) {
// Since we are setting up the cache we know the last lookup was a miss
// Free up the currently cached mask so it can be reused
fAACache.reset();
const GrTextureDesc desc = {
kRenderTarget_GrTextureFlagBit|kNoStencil_GrTextureFlagBit,
bounds.width(),
bounds.height(),
kAlpha_8_GrPixelConfig,
0 // samples
};
fAACache.acquireMask(clipIn, desc, bounds);
}
void GrInOrderDrawBuffer::clear(const GrIRect* rect, GrColor color) {
GrIRect r;
if (NULL == rect) {
// We could do something smart and remove previous draws and clears to
// the current render target. If we get that smart we have to make sure
// those draws aren't read before this clear (render-to-texture).
r.setLTRB(0, 0,
this->getRenderTarget()->width(),
this->getRenderTarget()->height());
rect = &r;
}
Clear& clr = fClears.push_back();
clr.fColor = color;
clr.fBeforeDrawIdx = fDraws.count();
clr.fRect = *rect;
}
// get a texture to act as a temporary buffer for AA clip boolean operations
// TODO: given the expense of createTexture we may want to just cache this too
void GrClipMaskManager::getTemp(const GrIRect& bounds,
GrAutoScratchTexture* temp) {
if (NULL != temp->texture()) {
// we've already allocated the temp texture
return;
}
const GrTextureDesc desc = {
kRenderTarget_GrTextureFlagBit|kNoStencil_GrTextureFlagBit,
bounds.width(),
bounds.height(),
kAlpha_8_GrPixelConfig,
0 // samples
};
temp->set(fAACache.getContext(), desc);
}
void GrInOrderDrawBuffer::clear(const GrIRect* rect, GrColor color, GrRenderTarget* renderTarget) {
GrIRect r;
if (NULL == renderTarget) {
renderTarget = this->drawState()->getRenderTarget();
GrAssert(NULL != renderTarget);
}
if (NULL == rect) {
// We could do something smart and remove previous draws and clears to
// the current render target. If we get that smart we have to make sure
// those draws aren't read before this clear (render-to-texture).
r.setLTRB(0, 0, renderTarget->width(), renderTarget->height());
rect = &r;
}
Clear* clr = this->recordClear();
clr->fColor = color;
clr->fRect = *rect;
clr->fRenderTarget = renderTarget;
renderTarget->ref();
}
void GrClip::setFromIRect(const GrIRect& r) {
fList.reset();
if (r.isEmpty()) {
// use a canonical empty rect for == testing.
setEmpty();
} else {
fList.push_back();
fList.back().fRect.set(r);
fList.back().fType = kRect_ClipType;
fConservativeBounds.set(r);
fConservativeBoundsValid = true;
}
}
////////////////////////////////////////////////////////////////////////////////
// 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;
}
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;
}
////////////////////////////////////////////////////////////////////////////////
// basic test of the cache's base functionality:
// push, pop, set, canReuse & getters
static void test_cache(skiatest::Reporter* reporter, GrContext* context) {
if (false) { // avoid bit rot, suppress warning
createTexture(context);
}
GrClipMaskCache cache;
cache.setContext(context);
SkClipStack emptyClip;
emptyClip.reset();
GrIRect emptyBound;
emptyBound.setEmpty();
// check initial state
check_state(reporter, cache, emptyClip, NULL, emptyBound);
// set the current state
GrIRect bound1;
bound1.set(0, 0, 100, 100);
SkClipStack clip1(bound1);
GrTextureDesc desc;
desc.fFlags = kRenderTarget_GrTextureFlagBit;
desc.fWidth = X_SIZE;
desc.fHeight = Y_SIZE;
desc.fConfig = kSkia8888_PM_GrPixelConfig;
cache.acquireMask(clip1, desc, bound1);
GrTexture* texture1 = cache.getLastMask();
REPORTER_ASSERT(reporter, texture1);
if (NULL == texture1) {
return;
}
// check that the set took
check_state(reporter, cache, clip1, texture1, bound1);
REPORTER_ASSERT(reporter, 1 == texture1->getRefCnt());
// push the state
cache.push();
// verify that the pushed state is initially empty
check_state(reporter, cache, emptyClip, NULL, emptyBound);
REPORTER_ASSERT(reporter, 1 == texture1->getRefCnt());
// modify the new state
GrIRect bound2;
bound2.set(-10, -10, 10, 10);
SkClipStack clip2(bound2);
cache.acquireMask(clip2, desc, bound2);
GrTexture* texture2 = cache.getLastMask();
REPORTER_ASSERT(reporter, texture2);
if (NULL == texture2) {
return;
}
// check that the changes took
check_state(reporter, cache, clip2, texture2, bound2);
REPORTER_ASSERT(reporter, 1 == texture1->getRefCnt());
REPORTER_ASSERT(reporter, 1 == texture2->getRefCnt());
// check to make sure canReuse works
REPORTER_ASSERT(reporter, cache.canReuse(clip2, bound2));
REPORTER_ASSERT(reporter, !cache.canReuse(clip1, bound1));
// pop the state
cache.pop();
// verify that the old state is restored
check_state(reporter, cache, clip1, texture1, bound1);
REPORTER_ASSERT(reporter, 1 == texture1->getRefCnt());
REPORTER_ASSERT(reporter, 1 == texture2->getRefCnt());
// manually clear the state
cache.reset();
// verify it is now empty
check_state(reporter, cache, emptyClip, NULL, emptyBound);
REPORTER_ASSERT(reporter, 1 == texture1->getRefCnt());
REPORTER_ASSERT(reporter, 1 == texture2->getRefCnt());
// pop again - so there is no state
cache.pop();
#if !defined(SK_DEBUG)
// verify that the getters don't crash
// only do in release since it generates asserts in debug
check_state(reporter, cache, emptyClip, NULL, emptyBound);
#endif
REPORTER_ASSERT(reporter, 1 == texture1->getRefCnt());
REPORTER_ASSERT(reporter, 1 == texture2->getRefCnt());
}
bool GrAAHairLinePathRenderer::createGeom(GrDrawTarget::StageBitfield stages) {
int rtHeight = fTarget->getRenderTarget()->height();
GrIRect clip;
if (fTarget->getClip().hasConservativeBounds()) {
GrRect clipRect = fTarget->getClip().getConservativeBounds();
clipRect.roundOut(&clip);
} else {
clip.setLargest();
}
// If none of the inputs that affect generation of path geometry have
// have changed since last previous path draw then we can reuse the
// previous geoemtry.
if (stages == fPreviousStages &&
fPreviousViewMatrix == fTarget->getViewMatrix() &&
fPreviousTranslate == fTranslate &&
rtHeight == fPreviousRTHeight &&
fClipRect == clip) {
return true;
}
GrVertexLayout layout = GrDrawTarget::kEdge_VertexLayoutBit;
for (int s = 0; s < GrDrawState::kNumStages; ++s) {
if ((1 << s) & stages) {
layout |= GrDrawTarget::StagePosAsTexCoordVertexLayoutBit(s);
}
}
GrMatrix viewM = fTarget->getViewMatrix();
PREALLOC_PTARRAY(128) lines;
PREALLOC_PTARRAY(128) quads;
IntArray qSubdivs;
fQuadCnt = generate_lines_and_quads(*fPath, viewM, fTranslate, clip,
&lines, &quads, &qSubdivs);
fLineSegmentCnt = lines.count() / 2;
int vertCnt = kVertsPerLineSeg * fLineSegmentCnt + kVertsPerQuad * fQuadCnt;
GrAssert(sizeof(Vertex) == GrDrawTarget::VertexSize(layout));
Vertex* verts;
if (!fTarget->reserveVertexSpace(layout, vertCnt, (void**)&verts)) {
return false;
}
Vertex* base = verts;
const GrMatrix* toDevice = NULL;
const GrMatrix* toSrc = NULL;
GrMatrix ivm;
if (viewM.hasPerspective()) {
if (viewM.invert(&ivm)) {
toDevice = &viewM;
toSrc = &ivm;
}
}
for (int i = 0; i < fLineSegmentCnt; ++i) {
add_line(&lines[2*i], rtHeight, toSrc, &verts);
}
int unsubdivQuadCnt = quads.count() / 3;
for (int i = 0; i < unsubdivQuadCnt; ++i) {
GrAssert(qSubdivs[i] >= 0);
add_quads(&quads[3*i], qSubdivs[i], toDevice, toSrc, &verts);
}
fPreviousStages = stages;
fPreviousViewMatrix = fTarget->getViewMatrix();
fPreviousRTHeight = rtHeight;
fClipRect = clip;
fPreviousTranslate = fTranslate;
return true;
}
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);
}
}
}
bool GrAAHairLinePathRenderer::createGeom(
const SkPath& path,
const GrVec* translate,
GrDrawTarget* target,
GrDrawState::StageMask stageMask,
int* lineCnt,
int* quadCnt,
GrDrawTarget::AutoReleaseGeometry* arg) {
const GrDrawState& drawState = target->getDrawState();
int rtHeight = drawState.getRenderTarget()->height();
GrIRect clip;
if (target->getClip().hasConservativeBounds()) {
GrRect clipRect = target->getClip().getConservativeBounds();
clipRect.roundOut(&clip);
} else {
clip.setLargest();
}
GrVertexLayout layout = GrDrawTarget::kEdge_VertexLayoutBit;
GrMatrix viewM = drawState.getViewMatrix();
PREALLOC_PTARRAY(128) lines;
PREALLOC_PTARRAY(128) quads;
IntArray qSubdivs;
static const GrVec gZeroVec = {0, 0};
if (NULL == translate) {
translate = &gZeroVec;
}
*quadCnt = generate_lines_and_quads(path, viewM, *translate, clip,
&lines, &quads, &qSubdivs);
*lineCnt = lines.count() / 2;
int vertCnt = kVertsPerLineSeg * *lineCnt + kVertsPerQuad * *quadCnt;
GrAssert(sizeof(Vertex) == GrDrawTarget::VertexSize(layout));
if (!arg->set(target, layout, vertCnt, 0)) {
return false;
}
Vertex* verts = reinterpret_cast<Vertex*>(arg->vertices());
const GrMatrix* toDevice = NULL;
const GrMatrix* toSrc = NULL;
GrMatrix ivm;
if (viewM.hasPerspective()) {
if (viewM.invert(&ivm)) {
toDevice = &viewM;
toSrc = &ivm;
}
}
for (int i = 0; i < *lineCnt; ++i) {
add_line(&lines[2*i], rtHeight, toSrc, &verts);
}
int unsubdivQuadCnt = quads.count() / 3;
for (int i = 0; i < unsubdivQuadCnt; ++i) {
GrAssert(qSubdivs[i] >= 0);
add_quads(&quads[3*i], qSubdivs[i], toDevice, toSrc, &verts);
}
return true;
}
