////////////////////////////////////////////////////////////////////////////////
// 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.next()) {
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()) {
if (clip->fDoAA) {
drawState->enableState(GrDrawState::kHWAntialias_StateBit);
} else {
drawState->disableState(GrDrawState::kHWAntialias_StateBit);
}
}
// 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, NULL, 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, NULL, 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);
}
}
}
void GrGLPathRendering::drawPaths(const GrPathRange* pathRange, const uint32_t indices[], int count,
const float transforms[], PathTransformType transformsType,
SkPath::FillType fill) {
SkASSERT(fGpu->caps()->pathRenderingSupport());
SkASSERT(NULL != fGpu->drawState()->getRenderTarget());
SkASSERT(NULL != fGpu->drawState()->getRenderTarget()->getStencilBuffer());
GrGLuint baseID = static_cast<const GrGLPathRange*>(pathRange)->basePathID();
this->flushPathStencilSettings(fill);
SkASSERT(!fHWPathStencilSettings.isTwoSided());
const SkStrokeRec& stroke = pathRange->getStroke();
SkPath::FillType nonInvertedFill =
SkPath::ConvertToNonInverseFillType(fill);
GrGLenum fillMode =
gr_stencil_op_to_gl_path_rendering_fill_mode(
fHWPathStencilSettings.passOp(GrStencilSettings::kFront_Face));
GrGLint writeMask =
fHWPathStencilSettings.writeMask(GrStencilSettings::kFront_Face);
if (nonInvertedFill == fill) {
if (stroke.needToApply()) {
if (SkStrokeRec::kStrokeAndFill_Style == stroke.getStyle()) {
GL_CALL(StencilFillPathInstanced(
count, GR_GL_UNSIGNED_INT, indices, baseID, fillMode,
writeMask, gXformType2GLType[transformsType],
transforms));
}
this->stencilThenCoverStrokePathInstanced(
count, GR_GL_UNSIGNED_INT, indices, baseID, 0xffff, writeMask,
GR_GL_BOUNDING_BOX_OF_BOUNDING_BOXES,
gXformType2GLType[transformsType], transforms);
} else {
this->stencilThenCoverFillPathInstanced(
count, GR_GL_UNSIGNED_INT, indices, baseID, fillMode, writeMask,
GR_GL_BOUNDING_BOX_OF_BOUNDING_BOXES,
gXformType2GLType[transformsType], transforms);
}
} else {
if (stroke.isFillStyle() || SkStrokeRec::kStrokeAndFill_Style == stroke.getStyle()) {
GL_CALL(StencilFillPathInstanced(
count, GR_GL_UNSIGNED_INT, indices, baseID, fillMode,
writeMask, gXformType2GLType[transformsType],
transforms));
}
if (stroke.needToApply()) {
GL_CALL(StencilStrokePathInstanced(
count, GR_GL_UNSIGNED_INT, indices, baseID, 0xffff,
writeMask, gXformType2GLType[transformsType],
transforms));
}
GrDrawState* drawState = fGpu->drawState();
GrDrawState::AutoViewMatrixRestore avmr;
SkRect bounds = SkRect::MakeLTRB(0, 0,
SkIntToScalar(drawState->getRenderTarget()->width()),
SkIntToScalar(drawState->getRenderTarget()->height()));
SkMatrix vmi;
// mapRect through persp matrix may not be correct
if (!drawState->getViewMatrix().hasPerspective() && drawState->getViewInverse(&vmi)) {
vmi.mapRect(&bounds);
// theoretically could set bloat = 0, instead leave it because of matrix inversion
// precision.
SkScalar bloat = drawState->getViewMatrix().getMaxScale() * SK_ScalarHalf;
bounds.outset(bloat, bloat);
} else {
avmr.setIdentity(drawState);
}
fGpu->drawSimpleRect(bounds);
}
}
bool GrGLProgramDesc::Build(const GrDrawState& drawState,
GrGpu::DrawType drawType,
GrDrawState::BlendOptFlags blendOpts,
GrBlendCoeff srcCoeff,
GrBlendCoeff dstCoeff,
const GrGpuGL* gpu,
const GrDeviceCoordTexture* dstCopy,
const GrEffectStage** geometryProcessor,
SkTArray<const GrEffectStage*, true>* colorStages,
SkTArray<const GrEffectStage*, true>* coverageStages,
GrGLProgramDesc* desc) {
colorStages->reset();
coverageStages->reset();
// This should already have been caught
SkASSERT(!(GrDrawState::kSkipDraw_BlendOptFlag & blendOpts));
bool skipCoverage = SkToBool(blendOpts & GrDrawState::kEmitTransBlack_BlendOptFlag);
bool skipColor = SkToBool(blendOpts & (GrDrawState::kEmitTransBlack_BlendOptFlag |
GrDrawState::kEmitCoverage_BlendOptFlag));
int firstEffectiveColorStage = 0;
bool inputColorIsUsed = true;
if (!skipColor) {
firstEffectiveColorStage = drawState.numColorStages();
while (firstEffectiveColorStage > 0 && inputColorIsUsed) {
--firstEffectiveColorStage;
const GrEffect* effect = drawState.getColorStage(firstEffectiveColorStage).getEffect();
inputColorIsUsed = effect->willUseInputColor();
}
}
int firstEffectiveCoverageStage = 0;
bool inputCoverageIsUsed = true;
if (!skipCoverage) {
firstEffectiveCoverageStage = drawState.numCoverageStages();
while (firstEffectiveCoverageStage > 0 && inputCoverageIsUsed) {
--firstEffectiveCoverageStage;
const GrEffect* effect = drawState.getCoverageStage(firstEffectiveCoverageStage).getEffect();
inputCoverageIsUsed = effect->willUseInputColor();
}
}
// The descriptor is used as a cache key. Thus when a field of the
// descriptor will not affect program generation (because of the attribute
// bindings in use or other descriptor field settings) it should be set
// to a canonical value to avoid duplicate programs with different keys.
bool requiresColorAttrib = !skipColor && drawState.hasColorVertexAttribute();
bool requiresCoverageAttrib = !skipCoverage && drawState.hasCoverageVertexAttribute();
// we only need the local coords if we're actually going to generate effect code
bool requiresLocalCoordAttrib = !(skipCoverage && skipColor) &&
drawState.hasLocalCoordAttribute();
bool readsDst = false;
bool readFragPosition = false;
// Provide option for shader programs without vertex shader only when drawing paths.
bool requiresVertexShader = !GrGpu::IsPathRenderingDrawType(drawType);
int numStages = 0;
if (drawState.hasGeometryProcessor()) {
numStages++;
}
if (!skipColor) {
numStages += drawState.numColorStages() - firstEffectiveColorStage;
}
if (!skipCoverage) {
numStages += drawState.numCoverageStages() - firstEffectiveCoverageStage;
}
GR_STATIC_ASSERT(0 == kEffectKeyOffsetsAndLengthOffset % sizeof(uint32_t));
// Make room for everything up to and including the array of offsets to effect keys.
desc->fKey.reset();
desc->fKey.push_back_n(kEffectKeyOffsetsAndLengthOffset + 2 * sizeof(uint16_t) * numStages);
int offsetAndSizeIndex = 0;
bool effectKeySuccess = true;
KeyHeader* header = desc->header();
// make sure any padding in the header is zeroed.
memset(desc->header(), 0, kHeaderSize);
// We can only have one effect which touches the vertex shader
if (drawState.hasGeometryProcessor()) {
uint16_t* offsetAndSize =
reinterpret_cast<uint16_t*>(desc->fKey.begin() + kEffectKeyOffsetsAndLengthOffset +
offsetAndSizeIndex * 2 * sizeof(uint16_t));
GrEffectKeyBuilder b(&desc->fKey);
uint16_t effectKeySize;
uint32_t effectOffset = desc->fKey.count();
effectKeySuccess |= GetEffectKeyAndUpdateStats(
*drawState.getGeometryProcessor(), gpu->glCaps(),
requiresLocalCoordAttrib, &b,
&effectKeySize, &readsDst,
&readFragPosition, &requiresVertexShader);
effectKeySuccess |= (effectOffset <= SK_MaxU16);
offsetAndSize[0] = SkToU16(effectOffset);
offsetAndSize[1] = effectKeySize;
++offsetAndSizeIndex;
*geometryProcessor = drawState.getGeometryProcessor();
SkASSERT(requiresVertexShader);
header->fHasGeometryProcessor = true;
}
if (!skipColor) {
for (int s = firstEffectiveColorStage; s < drawState.numColorStages(); ++s) {
uint16_t* offsetAndSize =
reinterpret_cast<uint16_t*>(desc->fKey.begin() + kEffectKeyOffsetsAndLengthOffset +
offsetAndSizeIndex * 2 * sizeof(uint16_t));
bool effectRequiresVertexShader = false;
GrEffectKeyBuilder b(&desc->fKey);
uint16_t effectKeySize;
uint32_t effectOffset = desc->fKey.count();
effectKeySuccess |= GetEffectKeyAndUpdateStats(
drawState.getColorStage(s), gpu->glCaps(),
requiresLocalCoordAttrib, &b,
&effectKeySize, &readsDst,
&readFragPosition, &effectRequiresVertexShader);
effectKeySuccess |= (effectOffset <= SK_MaxU16);
offsetAndSize[0] = SkToU16(effectOffset);
offsetAndSize[1] = effectKeySize;
++offsetAndSizeIndex;
SkASSERT(!effectRequiresVertexShader);
}
}
if (!skipCoverage) {
for (int s = firstEffectiveCoverageStage; s < drawState.numCoverageStages(); ++s) {
uint16_t* offsetAndSize =
reinterpret_cast<uint16_t*>(desc->fKey.begin() + kEffectKeyOffsetsAndLengthOffset +
offsetAndSizeIndex * 2 * sizeof(uint16_t));
bool effectRequiresVertexShader = false;
GrEffectKeyBuilder b(&desc->fKey);
uint16_t effectKeySize;
uint32_t effectOffset = desc->fKey.count();
effectKeySuccess |= GetEffectKeyAndUpdateStats(
drawState.getCoverageStage(s), gpu->glCaps(),
requiresLocalCoordAttrib, &b,
&effectKeySize, &readsDst,
&readFragPosition, &effectRequiresVertexShader);
effectKeySuccess |= (effectOffset <= SK_MaxU16);
offsetAndSize[0] = SkToU16(effectOffset);
offsetAndSize[1] = effectKeySize;
++offsetAndSizeIndex;
SkASSERT(!effectRequiresVertexShader);
}
}
if (!effectKeySuccess) {
desc->fKey.reset();
return false;
}
// Because header is a pointer into the dynamic array, we can't push any new data into the key
// below here.
header->fRequiresVertexShader = requiresVertexShader || requiresLocalCoordAttrib;
header->fEmitsPointSize = GrGpu::kDrawPoints_DrawType == drawType;
// Currently the experimental GS will only work with triangle prims (and it doesn't do anything
// other than pass through values from the VS to the FS anyway).
#if GR_GL_EXPERIMENTAL_GS
#if 0
header->fExperimentalGS = gpu->caps().geometryShaderSupport();
#else
header->fExperimentalGS = false;
#endif
#endif
bool defaultToUniformInputs = GR_GL_NO_CONSTANT_ATTRIBUTES || gpu->caps()->pathRenderingSupport();
if (!inputColorIsUsed && !skipColor) {
header->fColorInput = kAllOnes_ColorInput;
} else if (defaultToUniformInputs && !requiresColorAttrib && inputColorIsUsed) {
header->fColorInput = kUniform_ColorInput;
} else {
header->fColorInput = kAttribute_ColorInput;
header->fRequiresVertexShader = true;
}
bool covIsSolidWhite = !requiresCoverageAttrib && 0xffffffff == drawState.getCoverageColor();
if ((covIsSolidWhite || !inputCoverageIsUsed) && !skipCoverage) {
header->fCoverageInput = kAllOnes_ColorInput;
} else if (defaultToUniformInputs && !requiresCoverageAttrib && inputCoverageIsUsed) {
header->fCoverageInput = kUniform_ColorInput;
} else {
header->fCoverageInput = kAttribute_ColorInput;
header->fRequiresVertexShader = true;
}
if (readsDst) {
SkASSERT(NULL != dstCopy || gpu->caps()->dstReadInShaderSupport());
const GrTexture* dstCopyTexture = NULL;
if (NULL != dstCopy) {
dstCopyTexture = dstCopy->texture();
}
header->fDstReadKey = GrGLFragmentShaderBuilder::KeyForDstRead(dstCopyTexture,
gpu->glCaps());
SkASSERT(0 != header->fDstReadKey);
} else {
header->fDstReadKey = 0;
}
if (readFragPosition) {
header->fFragPosKey = GrGLFragmentShaderBuilder::KeyForFragmentPosition(
drawState.getRenderTarget(), gpu->glCaps());
} else {
header->fFragPosKey = 0;
}
// Record attribute indices
header->fPositionAttributeIndex = drawState.positionAttributeIndex();
header->fLocalCoordAttributeIndex = drawState.localCoordAttributeIndex();
// For constant color and coverage we need an attribute with an index beyond those already set
int availableAttributeIndex = drawState.getVertexAttribCount();
if (requiresColorAttrib) {
header->fColorAttributeIndex = drawState.colorVertexAttributeIndex();
} else if (GrGLProgramDesc::kAttribute_ColorInput == header->fColorInput) {
SkASSERT(availableAttributeIndex < GrDrawState::kMaxVertexAttribCnt);
header->fColorAttributeIndex = availableAttributeIndex;
availableAttributeIndex++;
} else {
header->fColorAttributeIndex = -1;
}
if (requiresCoverageAttrib) {
header->fCoverageAttributeIndex = drawState.coverageVertexAttributeIndex();
} else if (GrGLProgramDesc::kAttribute_ColorInput == header->fCoverageInput) {
SkASSERT(availableAttributeIndex < GrDrawState::kMaxVertexAttribCnt);
header->fCoverageAttributeIndex = availableAttributeIndex;
} else {
header->fCoverageAttributeIndex = -1;
}
// Here we deal with whether/how we handle color and coverage separately.
// Set this default and then possibly change our mind if there is coverage.
header->fCoverageOutput = kModulate_CoverageOutput;
// If we do have coverage determine whether it matters.
bool separateCoverageFromColor = drawState.hasGeometryProcessor();
if (!drawState.isCoverageDrawing() && !skipCoverage &&
(drawState.numCoverageStages() > 0 ||
drawState.hasGeometryProcessor() ||
requiresCoverageAttrib)) {
if (gpu->caps()->dualSourceBlendingSupport() &&
!(blendOpts & (GrDrawState::kEmitCoverage_BlendOptFlag |
GrDrawState::kCoverageAsAlpha_BlendOptFlag))) {
if (kZero_GrBlendCoeff == dstCoeff) {
// write the coverage value to second color
header->fCoverageOutput = kSecondaryCoverage_CoverageOutput;
separateCoverageFromColor = true;
} else if (kSA_GrBlendCoeff == dstCoeff) {
// SA dst coeff becomes 1-(1-SA)*coverage when dst is partially covered.
header->fCoverageOutput = kSecondaryCoverageISA_CoverageOutput;
separateCoverageFromColor = true;
} else if (kSC_GrBlendCoeff == dstCoeff) {
// SA dst coeff becomes 1-(1-SA)*coverage when dst is partially covered.
header->fCoverageOutput = kSecondaryCoverageISC_CoverageOutput;
separateCoverageFromColor = true;
}
} else if (readsDst &&
kOne_GrBlendCoeff == srcCoeff &&
kZero_GrBlendCoeff == dstCoeff) {
header->fCoverageOutput = kCombineWithDst_CoverageOutput;
separateCoverageFromColor = true;
}
}
if (!skipColor) {
for (int s = firstEffectiveColorStage; s < drawState.numColorStages(); ++s) {
colorStages->push_back(&drawState.getColorStage(s));
}
}
if (!skipCoverage) {
SkTArray<const GrEffectStage*, true>* array;
if (separateCoverageFromColor) {
array = coverageStages;
} else {
array = colorStages;
}
for (int s = firstEffectiveCoverageStage; s < drawState.numCoverageStages(); ++s) {
array->push_back(&drawState.getCoverageStage(s));
}
}
header->fColorEffectCnt = colorStages->count();
header->fCoverageEffectCnt = coverageStages->count();
desc->finalize();
return 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;
}
bool requiresAA = requires_AA(*clipDataIn->fClipStack);
#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() &&
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;
}
void GrGLProgramDesc::Build(const GrDrawState& drawState,
bool isPoints,
GrDrawState::BlendOptFlags blendOpts,
GrBlendCoeff srcCoeff,
GrBlendCoeff dstCoeff,
const GrGpuGL* gpu,
const GrDeviceCoordTexture* dstCopy,
SkTArray<const GrEffectStage*, true>* colorStages,
SkTArray<const GrEffectStage*, true>* coverageStages,
GrGLProgramDesc* desc) {
colorStages->reset();
coverageStages->reset();
// This should already have been caught
SkASSERT(!(GrDrawState::kSkipDraw_BlendOptFlag & blendOpts));
bool skipCoverage = SkToBool(blendOpts & GrDrawState::kEmitTransBlack_BlendOptFlag);
bool skipColor = SkToBool(blendOpts & (GrDrawState::kEmitTransBlack_BlendOptFlag |
GrDrawState::kEmitCoverage_BlendOptFlag));
int firstEffectiveColorStage = 0;
bool inputColorIsUsed = true;
if (!skipColor) {
firstEffectiveColorStage = drawState.numColorStages();
while (firstEffectiveColorStage > 0 && inputColorIsUsed) {
--firstEffectiveColorStage;
const GrEffect* effect = drawState.getColorStage(firstEffectiveColorStage).getEffect()->get();
inputColorIsUsed = effect->willUseInputColor();
}
}
int firstEffectiveCoverageStage = 0;
bool inputCoverageIsUsed = true;
if (!skipCoverage) {
firstEffectiveCoverageStage = drawState.numCoverageStages();
while (firstEffectiveCoverageStage > 0 && inputCoverageIsUsed) {
--firstEffectiveCoverageStage;
const GrEffect* effect = drawState.getCoverageStage(firstEffectiveCoverageStage).getEffect()->get();
inputCoverageIsUsed = effect->willUseInputColor();
}
}
// The descriptor is used as a cache key. Thus when a field of the
// descriptor will not affect program generation (because of the attribute
// bindings in use or other descriptor field settings) it should be set
// to a canonical value to avoid duplicate programs with different keys.
bool requiresColorAttrib = !skipColor && drawState.hasColorVertexAttribute();
bool requiresCoverageAttrib = !skipCoverage && drawState.hasCoverageVertexAttribute();
// we only need the local coords if we're actually going to generate effect code
bool requiresLocalCoordAttrib = !(skipCoverage && skipColor) &&
drawState.hasLocalCoordAttribute();
bool colorIsTransBlack = SkToBool(blendOpts & GrDrawState::kEmitTransBlack_BlendOptFlag);
bool colorIsSolidWhite = (blendOpts & GrDrawState::kEmitCoverage_BlendOptFlag) ||
(!requiresColorAttrib && 0xffffffff == drawState.getColor()) ||
(!inputColorIsUsed);
int numEffects = (skipColor ? 0 : (drawState.numColorStages() - firstEffectiveColorStage)) +
(skipCoverage ? 0 : (drawState.numCoverageStages() - firstEffectiveCoverageStage));
size_t newKeyLength = KeyLength(numEffects);
bool allocChanged;
desc->fKey.reset(newKeyLength, SkAutoMalloc::kAlloc_OnShrink, &allocChanged);
if (allocChanged || !desc->fInitialized) {
// make sure any padding in the header is zero if we we haven't used this allocation before.
memset(desc->header(), 0, kHeaderSize);
}
// write the key length
*desc->atOffset<uint32_t, kLengthOffset>() = SkToU32(newKeyLength);
KeyHeader* header = desc->header();
EffectKey* effectKeys = desc->effectKeys();
int currEffectKey = 0;
bool readsDst = false;
bool readFragPosition = false;
bool hasVertexCode = false;
if (!skipColor) {
for (int s = firstEffectiveColorStage; s < drawState.numColorStages(); ++s) {
effectKeys[currEffectKey++] =
get_key_and_update_stats(drawState.getColorStage(s), gpu->glCaps(),
requiresLocalCoordAttrib, &readsDst, &readFragPosition,
&hasVertexCode);
}
}
if (!skipCoverage) {
for (int s = firstEffectiveCoverageStage; s < drawState.numCoverageStages(); ++s) {
effectKeys[currEffectKey++] =
get_key_and_update_stats(drawState.getCoverageStage(s), gpu->glCaps(),
requiresLocalCoordAttrib, &readsDst, &readFragPosition,
&hasVertexCode);
}
}
header->fHasVertexCode = hasVertexCode || requiresLocalCoordAttrib;
header->fEmitsPointSize = isPoints;
// Currently the experimental GS will only work with triangle prims (and it doesn't do anything
// other than pass through values from the VS to the FS anyway).
#if GR_GL_EXPERIMENTAL_GS
#if 0
header->fExperimentalGS = gpu->caps().geometryShaderSupport();
#else
header->fExperimentalGS = false;
#endif
#endif
bool defaultToUniformInputs = GR_GL_NO_CONSTANT_ATTRIBUTES || gpu->caps()->pathRenderingSupport();
if (colorIsTransBlack) {
header->fColorInput = kTransBlack_ColorInput;
} else if (colorIsSolidWhite) {
header->fColorInput = kSolidWhite_ColorInput;
} else if (defaultToUniformInputs && !requiresColorAttrib) {
header->fColorInput = kUniform_ColorInput;
} else {
header->fColorInput = kAttribute_ColorInput;
header->fHasVertexCode = true;
}
bool covIsSolidWhite = !requiresCoverageAttrib && 0xffffffff == drawState.getCoverageColor();
if (skipCoverage) {
header->fCoverageInput = kTransBlack_ColorInput;
} else if (covIsSolidWhite || !inputCoverageIsUsed) {
header->fCoverageInput = kSolidWhite_ColorInput;
} else if (defaultToUniformInputs && !requiresCoverageAttrib) {
header->fCoverageInput = kUniform_ColorInput;
} else {
header->fCoverageInput = kAttribute_ColorInput;
header->fHasVertexCode = true;
}
if (readsDst) {
SkASSERT(NULL != dstCopy || gpu->caps()->dstReadInShaderSupport());
const GrTexture* dstCopyTexture = NULL;
if (NULL != dstCopy) {
dstCopyTexture = dstCopy->texture();
}
header->fDstReadKey = GrGLShaderBuilder::KeyForDstRead(dstCopyTexture, gpu->glCaps());
SkASSERT(0 != header->fDstReadKey);
} else {
header->fDstReadKey = 0;
}
if (readFragPosition) {
header->fFragPosKey = GrGLShaderBuilder::KeyForFragmentPosition(drawState.getRenderTarget(),
gpu->glCaps());
} else {
header->fFragPosKey = 0;
}
// Record attribute indices
header->fPositionAttributeIndex = drawState.positionAttributeIndex();
header->fLocalCoordAttributeIndex = drawState.localCoordAttributeIndex();
// For constant color and coverage we need an attribute with an index beyond those already set
int availableAttributeIndex = drawState.getVertexAttribCount();
if (requiresColorAttrib) {
header->fColorAttributeIndex = drawState.colorVertexAttributeIndex();
} else if (GrGLProgramDesc::kAttribute_ColorInput == header->fColorInput) {
SkASSERT(availableAttributeIndex < GrDrawState::kMaxVertexAttribCnt);
header->fColorAttributeIndex = availableAttributeIndex;
availableAttributeIndex++;
} else {
header->fColorAttributeIndex = -1;
}
if (requiresCoverageAttrib) {
header->fCoverageAttributeIndex = drawState.coverageVertexAttributeIndex();
} else if (GrGLProgramDesc::kAttribute_ColorInput == header->fCoverageInput) {
SkASSERT(availableAttributeIndex < GrDrawState::kMaxVertexAttribCnt);
header->fCoverageAttributeIndex = availableAttributeIndex;
} else {
header->fCoverageAttributeIndex = -1;
}
// Here we deal with whether/how we handle color and coverage separately.
// Set these defaults and then possibly change our mind if there is coverage.
header->fDiscardIfZeroCoverage = false;
header->fCoverageOutput = kModulate_CoverageOutput;
// If we do have coverage determine whether it matters.
bool separateCoverageFromColor = false;
if (!drawState.isCoverageDrawing() && !skipCoverage &&
(drawState.numCoverageStages() > 0 || requiresCoverageAttrib)) {
// If we're stenciling then we want to discard samples that have zero coverage
if (drawState.getStencil().doesWrite()) {
header->fDiscardIfZeroCoverage = true;
separateCoverageFromColor = true;
}
if (gpu->caps()->dualSourceBlendingSupport() &&
!(blendOpts & (GrDrawState::kEmitCoverage_BlendOptFlag |
GrDrawState::kCoverageAsAlpha_BlendOptFlag))) {
if (kZero_GrBlendCoeff == dstCoeff) {
// write the coverage value to second color
header->fCoverageOutput = kSecondaryCoverage_CoverageOutput;
separateCoverageFromColor = true;
} else if (kSA_GrBlendCoeff == dstCoeff) {
// SA dst coeff becomes 1-(1-SA)*coverage when dst is partially covered.
header->fCoverageOutput = kSecondaryCoverageISA_CoverageOutput;
separateCoverageFromColor = true;
} else if (kSC_GrBlendCoeff == dstCoeff) {
// SA dst coeff becomes 1-(1-SA)*coverage when dst is partially covered.
header->fCoverageOutput = kSecondaryCoverageISC_CoverageOutput;
separateCoverageFromColor = true;
}
} else if (readsDst &&
kOne_GrBlendCoeff == srcCoeff &&
kZero_GrBlendCoeff == dstCoeff) {
header->fCoverageOutput = kCombineWithDst_CoverageOutput;
separateCoverageFromColor = true;
}
}
if (!skipColor) {
for (int s = firstEffectiveColorStage; s < drawState.numColorStages(); ++s) {
colorStages->push_back(&drawState.getColorStage(s));
}
}
if (!skipCoverage) {
SkTArray<const GrEffectStage*, true>* array;
if (separateCoverageFromColor) {
array = coverageStages;
} else {
array = colorStages;
}
for (int s = firstEffectiveCoverageStage; s < drawState.numCoverageStages(); ++s) {
array->push_back(&drawState.getCoverageStage(s));
}
}
header->fColorEffectCnt = colorStages->count();
header->fCoverageEffectCnt = coverageStages->count();
*desc->checksum() = 0;
*desc->checksum() = SkChecksum::Compute(reinterpret_cast<uint32_t*>(desc->fKey.get()),
newKeyLength);
desc->fInitialized = true;
}
bool GrStencilAndCoverPathRenderer::onDrawPath(const SkPath& path,
const SkStroke& stroke,
GrDrawTarget* target,
bool antiAlias) {
GrAssert(!antiAlias);
GrAssert(0 != stroke.getWidthIfStroked());
GrDrawState* drawState = target->drawState();
GrAssert(drawState->getStencil().isDisabled());
SkAutoTUnref<GrPath> p(fGpu->createPath(path));
SkPath::FillType nonInvertedFill = SkPath::NonInverseFill(path.getFillType());
target->stencilPath(p, stroke, nonInvertedFill);
// TODO: Use built in cover operation rather than a rect draw. This will require making our
// fragment shaders be able to eat varyings generated by a matrix.
// fill the path, zero out the stencil
GrRect bounds = p->getBounds();
SkScalar bloat = drawState->getViewMatrix().getMaxStretch() * SK_ScalarHalf;
GrDrawState::AutoDeviceCoordDraw adcd;
if (nonInvertedFill == path.getFillType()) {
GR_STATIC_CONST_SAME_STENCIL(kStencilPass,
kZero_StencilOp,
kZero_StencilOp,
kNotEqual_StencilFunc,
0xffff,
0x0000,
0xffff);
*drawState->stencil() = kStencilPass;
} else {
GR_STATIC_CONST_SAME_STENCIL(kInvertedStencilPass,
kZero_StencilOp,
kZero_StencilOp,
// We know our rect will hit pixels outside the clip and the user bits will be 0
// outside the clip. So we can't just fill where the user bits are 0. We also need to
// check that the clip bit is set.
kEqualIfInClip_StencilFunc,
0xffff,
0x0000,
0xffff);
SkMatrix vmi;
bounds.setLTRB(0, 0,
SkIntToScalar(drawState->getRenderTarget()->width()),
SkIntToScalar(drawState->getRenderTarget()->height()));
// mapRect through persp matrix may not be correct
if (!drawState->getViewMatrix().hasPerspective() && drawState->getViewInverse(&vmi)) {
vmi.mapRect(&bounds);
// theoretically could set bloat = 0, instead leave it because of matrix inversion
// precision.
} else {
adcd.set(drawState);
bloat = 0;
}
*drawState->stencil() = kInvertedStencilPass;
}
bounds.outset(bloat, bloat);
target->drawSimpleRect(bounds, NULL);
target->drawState()->stencil()->setDisabled();
return true;
}
bool GrDefaultPathRenderer::internalDrawPath(const SkPath& path,
GrPathFill fill,
GrDrawTarget* target,
bool stencilOnly) {
GrMatrix viewM = target->getDrawState().getViewMatrix();
GrScalar tol = GR_Scalar1;
tol = GrPathUtils::scaleToleranceToSrc(tol, viewM, path.getBounds());
int vertexCnt;
int indexCnt;
GrPrimitiveType primType;
GrDrawTarget::AutoReleaseGeometry arg;
if (!this->createGeom(path,
fill,
tol,
target,
&primType,
&vertexCnt,
&indexCnt,
&arg)) {
return false;
}
GrAssert(NULL != target);
GrDrawTarget::AutoStateRestore asr(target, GrDrawTarget::kPreserve_ASRInit);
GrDrawState* drawState = target->drawState();
bool colorWritesWereDisabled = drawState->isColorWriteDisabled();
// face culling doesn't make sense here
GrAssert(GrDrawState::kBoth_DrawFace == drawState->getDrawFace());
int passCount = 0;
const GrStencilSettings* passes[3];
GrDrawState::DrawFace drawFace[3];
bool reverse = false;
bool lastPassIsBounds;
if (kHairLine_GrPathFill == fill) {
passCount = 1;
if (stencilOnly) {
passes[0] = &gDirectToStencil;
} else {
passes[0] = NULL;
}
lastPassIsBounds = false;
drawFace[0] = GrDrawState::kBoth_DrawFace;
} else {
if (single_pass_path(path, fill)) {
passCount = 1;
if (stencilOnly) {
passes[0] = &gDirectToStencil;
} else {
passes[0] = NULL;
}
drawFace[0] = GrDrawState::kBoth_DrawFace;
lastPassIsBounds = false;
} else {
switch (fill) {
case kInverseEvenOdd_GrPathFill:
reverse = true;
// fallthrough
case kEvenOdd_GrPathFill:
passes[0] = &gEOStencilPass;
if (stencilOnly) {
passCount = 1;
lastPassIsBounds = false;
} else {
passCount = 2;
lastPassIsBounds = true;
if (reverse) {
passes[1] = &gInvEOColorPass;
} else {
passes[1] = &gEOColorPass;
}
}
drawFace[0] = drawFace[1] = GrDrawState::kBoth_DrawFace;
break;
case kInverseWinding_GrPathFill:
reverse = true;
// fallthrough
case kWinding_GrPathFill:
if (fSeparateStencil) {
if (fStencilWrapOps) {
passes[0] = &gWindStencilSeparateWithWrap;
} else {
passes[0] = &gWindStencilSeparateNoWrap;
}
passCount = 2;
drawFace[0] = GrDrawState::kBoth_DrawFace;
} else {
if (fStencilWrapOps) {
passes[0] = &gWindSingleStencilWithWrapInc;
passes[1] = &gWindSingleStencilWithWrapDec;
} else {
passes[0] = &gWindSingleStencilNoWrapInc;
passes[1] = &gWindSingleStencilNoWrapDec;
}
// which is cw and which is ccw is arbitrary.
drawFace[0] = GrDrawState::kCW_DrawFace;
drawFace[1] = GrDrawState::kCCW_DrawFace;
passCount = 3;
}
if (stencilOnly) {
lastPassIsBounds = false;
--passCount;
} else {
lastPassIsBounds = true;
drawFace[passCount-1] = GrDrawState::kBoth_DrawFace;
if (reverse) {
passes[passCount-1] = &gInvWindColorPass;
} else {
passes[passCount-1] = &gWindColorPass;
}
}
break;
default:
GrAssert(!"Unknown path fFill!");
return false;
}
}
}
{
for (int p = 0; p < passCount; ++p) {
drawState->setDrawFace(drawFace[p]);
if (NULL != passes[p]) {
*drawState->stencil() = *passes[p];
}
if (lastPassIsBounds && (p == passCount-1)) {
if (!colorWritesWereDisabled) {
drawState->disableState(GrDrawState::kNoColorWrites_StateBit);
}
GrRect bounds;
GrDrawState::AutoDeviceCoordDraw adcd;
if (reverse) {
GrAssert(NULL != drawState->getRenderTarget());
// draw over the whole world.
bounds.setLTRB(0, 0,
GrIntToScalar(drawState->getRenderTarget()->width()),
GrIntToScalar(drawState->getRenderTarget()->height()));
GrMatrix vmi;
// mapRect through persp matrix may not be correct
if (!drawState->getViewMatrix().hasPerspective() &&
drawState->getViewInverse(&vmi)) {
vmi.mapRect(&bounds);
} else {
adcd.set(drawState);
}
} else {
bounds = path.getBounds();
}
GrDrawTarget::AutoGeometryPush agp(target);
target->drawSimpleRect(bounds, NULL);
} else {
if (passCount > 1) {
drawState->enableState(GrDrawState::kNoColorWrites_StateBit);
}
if (indexCnt) {
target->drawIndexed(primType, 0, 0,
vertexCnt, indexCnt);
} else {
target->drawNonIndexed(primType, 0, vertexCnt);
}
}
}
}
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 GrStencilAndCoverPathRenderer::onDrawPath(const SkPath& path,
const SkStrokeRec& stroke,
GrDrawTarget* target,
bool antiAlias) {
SkASSERT(!antiAlias);
SkASSERT(!stroke.isHairlineStyle());
GrDrawState* drawState = target->drawState();
SkASSERT(drawState->getStencil().isDisabled());
SkAutoTUnref<GrPath> p(get_gr_path(fGpu, path, stroke));
if (path.isInverseFillType()) {
GR_STATIC_CONST_SAME_STENCIL(kInvertedStencilPass,
kZero_StencilOp,
kZero_StencilOp,
// We know our rect will hit pixels outside the clip and the user bits will be 0
// outside the clip. So we can't just fill where the user bits are 0. We also need to
// check that the clip bit is set.
kEqualIfInClip_StencilFunc,
0xffff,
0x0000,
0xffff);
drawState->setStencil(kInvertedStencilPass);
// fake inverse with a stencil and cover
target->stencilPath(p, convert_skpath_filltype(path.getFillType()));
GrDrawState::AutoViewMatrixRestore avmr;
SkRect bounds = SkRect::MakeLTRB(0, 0,
SkIntToScalar(drawState->getRenderTarget()->width()),
SkIntToScalar(drawState->getRenderTarget()->height()));
SkMatrix vmi;
// mapRect through persp matrix may not be correct
if (!drawState->getViewMatrix().hasPerspective() && drawState->getViewInverse(&vmi)) {
vmi.mapRect(&bounds);
// theoretically could set bloat = 0, instead leave it because of matrix inversion
// precision.
SkScalar bloat = drawState->getViewMatrix().getMaxScale() * SK_ScalarHalf;
bounds.outset(bloat, bloat);
} else {
avmr.setIdentity(drawState);
}
target->drawSimpleRect(bounds);
} else {
GR_STATIC_CONST_SAME_STENCIL(kStencilPass,
kZero_StencilOp,
kZero_StencilOp,
kNotEqual_StencilFunc,
0xffff,
0x0000,
0xffff);
drawState->setStencil(kStencilPass);
target->drawPath(p, convert_skpath_filltype(path.getFillType()));
}
target->drawState()->stencil()->setDisabled();
return true;
}
void GrInOrderDrawBuffer::drawRect(const GrRect& rect,
const SkMatrix* matrix,
const GrRect* srcRects[],
const SkMatrix* srcMatrices[]) {
GrAssert(!(NULL == fQuadIndexBuffer && fCurrQuad));
GrAssert(!(fDraws.empty() && fCurrQuad));
GrAssert(!(0 != fMaxQuads && NULL == fQuadIndexBuffer));
GrDrawState* drawState = this->drawState();
// if we have a quad IB then either append to the previous run of
// rects or start a new run
if (fMaxQuads) {
bool appendToPreviousDraw = false;
GrVertexLayout layout = GetRectVertexLayout(srcRects);
// Batching across colors means we move the draw color into the
// rect's vertex colors to allow greater batching (a lot of rects
// in a row differing only in color is a common occurence in tables).
bool batchAcrossColors = true;
if (!this->getCaps().dualSourceBlendingSupport()) {
for (int s = 0; s < GrDrawState::kNumStages; ++s) {
if (this->getDrawState().isStageEnabled(s)) {
// We disable batching across colors when there is a texture
// present because (by pushing the the color to the vertices)
// Ganesh loses track of the rect's opacity. This, in turn, can
// cause some of the blending optimizations to be disabled. This
// becomes a huge problem on some of the smaller devices where
// shader derivatives and dual source blending aren't supported.
// In those cases paths are often drawn to a texture and then
// drawn as a texture (using this method). Because dual source
// blending is disabled (and the blend optimizations are short
// circuited) some of the more esoteric blend modes can no longer
// be supported.
// TODO: add tracking of batchAcrossColors's opacity
batchAcrossColors = false;
break;
}
}
}
if (batchAcrossColors) {
layout |= GrDrawState::kColor_VertexLayoutBit;
}
AutoReleaseGeometry geo(this, layout, 4, 0);
if (!geo.succeeded()) {
GrPrintf("Failed to get space for vertices!\n");
return;
}
SkMatrix combinedMatrix = drawState->getViewMatrix();
// We go to device space so that matrix changes allow us to concat
// rect draws. When the caller has provided explicit source rects
// then we don't want to modify the stages' matrices. Otherwise
// we have to account for the view matrix change in the stage
// matrices.
uint32_t explicitCoordMask = 0;
if (srcRects) {
for (int s = 0; s < GrDrawState::kNumStages; ++s) {
if (srcRects[s]) {
explicitCoordMask |= (1 << s);
}
}
}
GrDrawState::AutoDeviceCoordDraw adcd(this->drawState(), explicitCoordMask);
if (!adcd.succeeded()) {
return;
}
if (NULL != matrix) {
combinedMatrix.preConcat(*matrix);
}
SetRectVertices(rect, &combinedMatrix, srcRects, srcMatrices,
this->getDrawState().getColor(), layout, geo.vertices());
// Now that the paint's color is stored in the vertices set it to
// white so that the following code can batch all the rects regardless
// of paint color
GrDrawState::AutoColorRestore acr(this->drawState(),
batchAcrossColors ? SK_ColorWHITE
: this->getDrawState().getColor());
// we don't want to miss an opportunity to batch rects together
// simply because the clip has changed if the clip doesn't affect
// the rect.
bool disabledClip = false;
if (drawState->isClipState()) {
GrRect devClipRect;
bool isIntersectionOfRects = false;
const GrClipData* clip = this->getClip();
clip->fClipStack->getConservativeBounds(-clip->fOrigin.fX,
-clip->fOrigin.fY,
drawState->getRenderTarget()->width(),
drawState->getRenderTarget()->height(),
&devClipRect,
&isIntersectionOfRects);
if (isIntersectionOfRects) {
// If the clip rect touches the edge of the viewport, extended it
// out (close) to infinity to avoid bogus intersections.
// We might consider a more exact clip to viewport if this
// conservative test fails.
const GrRenderTarget* target = drawState->getRenderTarget();
if (0 >= devClipRect.fLeft) {
devClipRect.fLeft = SK_ScalarMin;
}
if (target->width() <= devClipRect.fRight) {
devClipRect.fRight = SK_ScalarMax;
}
if (0 >= devClipRect.top()) {
devClipRect.fTop = SK_ScalarMin;
}
if (target->height() <= devClipRect.fBottom) {
devClipRect.fBottom = SK_ScalarMax;
}
int stride = GrDrawState::VertexSize(layout);
bool insideClip = true;
for (int v = 0; v < 4; ++v) {
const GrPoint& p = *GrDrawState::GetVertexPoint(geo.vertices(), v, stride);
if (!devClipRect.contains(p)) {
insideClip = false;
break;
}
}
if (insideClip) {
drawState->disableState(GrDrawState::kClip_StateBit);
disabledClip = true;
}
}
}
if (!this->needsNewClip() &&
!this->needsNewState() &&
fCurrQuad > 0 &&
fCurrQuad < fMaxQuads &&
layout == fLastRectVertexLayout) {
int vsize = GrDrawState::VertexSize(layout);
Draw& lastDraw = fDraws.back();
GrAssert(lastDraw.fIndexBuffer == fQuadIndexBuffer);
GrAssert(kTriangles_GrPrimitiveType == lastDraw.fPrimitiveType);
GrAssert(0 == lastDraw.fVertexCount % 4);
GrAssert(0 == lastDraw.fIndexCount % 6);
GrAssert(0 == lastDraw.fStartIndex);
GeometryPoolState& poolState = fGeoPoolStateStack.back();
appendToPreviousDraw =
kDraw_Cmd == fCmds.back() &&
lastDraw.fVertexBuffer == poolState.fPoolVertexBuffer &&
(fCurrQuad * 4 + lastDraw.fStartVertex) == poolState.fPoolStartVertex;
if (appendToPreviousDraw) {
lastDraw.fVertexCount += 4;
lastDraw.fIndexCount += 6;
fCurrQuad += 1;
// we reserved above, so we should be the first
// use of this vertex reservation.
GrAssert(0 == poolState.fUsedPoolVertexBytes);
poolState.fUsedPoolVertexBytes = 4 * vsize;
}
}
if (!appendToPreviousDraw) {
this->setIndexSourceToBuffer(fQuadIndexBuffer);
this->drawIndexed(kTriangles_GrPrimitiveType, 0, 0, 4, 6);
fCurrQuad = 1;
fLastRectVertexLayout = layout;
}
if (disabledClip) {
drawState->enableState(GrDrawState::kClip_StateBit);
}
fInstancedDrawTracker.reset();
} else {
INHERITED::drawRect(rect, matrix, srcRects, srcMatrices);
}
}
void GrDefaultPathRenderer::onDrawPath(GrDrawState::StageMask stageMask,
bool stencilOnly) {
GrMatrix viewM = fTarget->getDrawState().getViewMatrix();
GrScalar tol = GR_Scalar1;
tol = GrPathUtils::scaleToleranceToSrc(tol, viewM, fPath->getBounds());
GrDrawState* drawState = fTarget->drawState();
// FIXME: It's really dumb that we recreate the verts for a new vertex
// layout. We only do that because the GrDrawTarget API doesn't allow
// us to change the vertex layout after reserveVertexSpace(). We won't
// actually change the vertex data when the layout changes since all the
// stages reference the positions (rather than having separate tex coords)
// and we don't ever have per-vert colors. In practice our call sites
// won't change the stages in use inside a setPath / removePath pair. But
// it is a silly limitation of the GrDrawTarget design that should be fixed.
if (tol != fPreviousSrcTol ||
stageMask != fPreviousStages) {
if (!this->createGeom(tol, stageMask)) {
return;
}
}
GrAssert(NULL != fTarget);
GrDrawTarget::AutoStateRestore asr(fTarget);
bool colorWritesWereDisabled = drawState->isColorWriteDisabled();
// face culling doesn't make sense here
GrAssert(GrDrawState::kBoth_DrawFace == drawState->getDrawFace());
int passCount = 0;
const GrStencilSettings* passes[3];
GrDrawState::DrawFace drawFace[3];
bool reverse = false;
bool lastPassIsBounds;
if (kHairLine_PathFill == fFill) {
passCount = 1;
if (stencilOnly) {
passes[0] = &gDirectToStencil;
} else {
passes[0] = NULL;
}
lastPassIsBounds = false;
drawFace[0] = GrDrawState::kBoth_DrawFace;
} else {
if (single_pass_path(*fTarget, *fPath, fFill)) {
passCount = 1;
if (stencilOnly) {
passes[0] = &gDirectToStencil;
} else {
passes[0] = NULL;
}
drawFace[0] = GrDrawState::kBoth_DrawFace;
lastPassIsBounds = false;
} else {
switch (fFill) {
case kInverseEvenOdd_PathFill:
reverse = true;
// fallthrough
case kEvenOdd_PathFill:
passes[0] = &gEOStencilPass;
if (stencilOnly) {
passCount = 1;
lastPassIsBounds = false;
} else {
passCount = 2;
lastPassIsBounds = true;
if (reverse) {
passes[1] = &gInvEOColorPass;
} else {
passes[1] = &gEOColorPass;
}
}
drawFace[0] = drawFace[1] = GrDrawState::kBoth_DrawFace;
break;
case kInverseWinding_PathFill:
reverse = true;
// fallthrough
case kWinding_PathFill:
if (fSeparateStencil) {
if (fStencilWrapOps) {
passes[0] = &gWindStencilSeparateWithWrap;
} else {
passes[0] = &gWindStencilSeparateNoWrap;
}
passCount = 2;
drawFace[0] = GrDrawState::kBoth_DrawFace;
} else {
if (fStencilWrapOps) {
passes[0] = &gWindSingleStencilWithWrapInc;
passes[1] = &gWindSingleStencilWithWrapDec;
} else {
passes[0] = &gWindSingleStencilNoWrapInc;
passes[1] = &gWindSingleStencilNoWrapDec;
}
// which is cw and which is ccw is arbitrary.
drawFace[0] = GrDrawState::kCW_DrawFace;
drawFace[1] = GrDrawState::kCCW_DrawFace;
passCount = 3;
}
if (stencilOnly) {
lastPassIsBounds = false;
--passCount;
} else {
lastPassIsBounds = true;
drawFace[passCount-1] = GrDrawState::kBoth_DrawFace;
if (reverse) {
passes[passCount-1] = &gInvWindColorPass;
} else {
passes[passCount-1] = &gWindColorPass;
}
}
break;
default:
GrAssert(!"Unknown path fFill!");
return;
}
}
}
{
for (int p = 0; p < passCount; ++p) {
drawState->setDrawFace(drawFace[p]);
if (NULL != passes[p]) {
*drawState->stencil() = *passes[p];
}
if (lastPassIsBounds && (p == passCount-1)) {
if (!colorWritesWereDisabled) {
drawState->disableState(GrDrawState::kNoColorWrites_StateBit);
}
GrRect bounds;
if (reverse) {
GrAssert(NULL != drawState->getRenderTarget());
// draw over the whole world.
bounds.setLTRB(0, 0,
GrIntToScalar(drawState->getRenderTarget()->width()),
GrIntToScalar(drawState->getRenderTarget()->height()));
GrMatrix vmi;
// mapRect through persp matrix may not be correct
if (!drawState->getViewMatrix().hasPerspective() &&
drawState->getViewInverse(&vmi)) {
vmi.mapRect(&bounds);
} else {
if (stageMask) {
if (!drawState->getViewInverse(&vmi)) {
GrPrintf("Could not invert matrix.");
return;
}
drawState->preConcatSamplerMatrices(stageMask, vmi);
}
drawState->setViewMatrix(GrMatrix::I());
}
} else {
bounds = fPath->getBounds();
bounds.offset(fTranslate);
}
GrDrawTarget::AutoGeometryPush agp(fTarget);
fTarget->drawSimpleRect(bounds, NULL, stageMask);
} else {
if (passCount > 1) {
drawState->enableState(GrDrawState::kNoColorWrites_StateBit);
}
if (fUseIndexedDraw) {
fTarget->drawIndexed(fPrimitiveType, 0, 0,
fVertexCnt, fIndexCnt);
} else {
int baseVertex = 0;
for (int sp = 0; sp < fSubpathCount; ++sp) {
fTarget->drawNonIndexed(fPrimitiveType, baseVertex,
fSubpathVertCount[sp]);
baseVertex += fSubpathVertCount[sp];
}
}
}
}
}
}
////////////////////////////////////////////////////////////////////////////////
// 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->getContext()->getPathRenderer(*clipPath,
fill, gpu, false,
true);
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);
}
}
}
////////////////////////////////////////////////////////////////////////////////
// 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;
}
