Gitiles
Code Review Sign In
gerrit-public.fairphone.software / platform / external / skia / 9176e2c159089458b1e2226a94fab1af0fba32ac / . / src / gpu / GrContext.cpp
blob: 657e57da33cf6a092e8dab9e0d82cf49e55f7489 [file] [log] [blame]
/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrContext.h"
#include "GrAARectRenderer.h"
#include "GrBufferAllocPool.h"
#include "GrDefaultGeoProcFactory.h"
#include "GrGpuResource.h"
#include "GrGpuResourceCacheAccess.h"
#include "GrDistanceFieldTextContext.h"
#include "GrDrawTargetCaps.h"
#include "GrGpu.h"
#include "GrIndexBuffer.h"
#include "GrInOrderDrawBuffer.h"
#include "GrLayerCache.h"
#include "GrOvalRenderer.h"
#include "GrPathRenderer.h"
#include "GrPathUtils.h"
#include "GrResourceCache2.h"
#include "GrSoftwarePathRenderer.h"
#include "GrStencilBuffer.h"
#include "GrStencilAndCoverTextContext.h"
#include "GrStrokeInfo.h"
#include "GrSurfacePriv.h"
#include "GrTextStrike.h"
#include "GrTexturePriv.h"
#include "GrTraceMarker.h"
#include "GrTracing.h"
#include "SkDashPathPriv.h"
#include "SkConfig8888.h"
#include "SkGr.h"
#include "SkRRect.h"
#include "SkStrokeRec.h"
#include "SkTLazy.h"
#include "SkTLS.h"
#include "SkTraceEvent.h"
#include "effects/GrConfigConversionEffect.h"
#include "effects/GrDashingEffect.h"
#include "effects/GrSingleTextureEffect.h"
#ifdef SK_DEBUG
// change this to a 1 to see notifications when partial coverage fails
#define GR_DEBUG_PARTIAL_COVERAGE_CHECK 0
#else
#define GR_DEBUG_PARTIAL_COVERAGE_CHECK 0
#endif
static const size_t DRAW_BUFFER_VBPOOL_BUFFER_SIZE = 1 << 15;
static const int DRAW_BUFFER_VBPOOL_PREALLOC_BUFFERS = 4;
static const size_t DRAW_BUFFER_IBPOOL_BUFFER_SIZE = 1 << 11;
static const int DRAW_BUFFER_IBPOOL_PREALLOC_BUFFERS = 4;
#define ASSERT_OWNED_RESOURCE(R) SkASSERT(!(R) || (R)->getContext() == this)
class GrContext::AutoCheckFlush {
public:
AutoCheckFlush(GrContext* context) : fContext(context) { SkASSERT(context); }
~AutoCheckFlush() {
if (fContext->fFlushToReduceCacheSize) {
fContext->flush();
}
}
private:
GrContext* fContext;
};
GrContext* GrContext::Create(GrBackend backend, GrBackendContext backendContext,
const Options* opts) {
GrContext* context;
if (NULL == opts) {
context = SkNEW_ARGS(GrContext, (Options()));
} else {
context = SkNEW_ARGS(GrContext, (*opts));
}
if (context->init(backend, backendContext)) {
return context;
} else {
context->unref();
return NULL;
}
}
GrContext::GrContext(const Options& opts) : fOptions(opts) {
fGpu = NULL;
fClip = NULL;
fPathRendererChain = NULL;
fSoftwarePathRenderer = NULL;
fResourceCache2 = NULL;
fFontCache = NULL;
fDrawBuffer = NULL;
fDrawBufferVBAllocPool = NULL;
fDrawBufferIBAllocPool = NULL;
fFlushToReduceCacheSize = false;
fAARectRenderer = NULL;
fOvalRenderer = NULL;
fViewMatrix.reset();
fMaxTextureSizeOverride = 1 << 20;
}
bool GrContext::init(GrBackend backend, GrBackendContext backendContext) {
SkASSERT(NULL == fGpu);
fGpu = GrGpu::Create(backend, backendContext, this);
if (NULL == fGpu) {
return false;
}
this->initCommon();
return true;
}
void GrContext::initCommon() {
fResourceCache2 = SkNEW(GrResourceCache2);
fResourceCache2->setOverBudgetCallback(OverBudgetCB, this);
fFontCache = SkNEW_ARGS(GrFontCache, (fGpu));
fLayerCache.reset(SkNEW_ARGS(GrLayerCache, (this)));
fAARectRenderer = SkNEW_ARGS(GrAARectRenderer, (fGpu));
fOvalRenderer = SkNEW(GrOvalRenderer);
fDidTestPMConversions = false;
this->setupDrawBuffer();
}
GrContext::~GrContext() {
if (NULL == fGpu) {
return;
}
this->flush();
for (int i = 0; i < fCleanUpData.count(); ++i) {
(*fCleanUpData[i].fFunc)(this, fCleanUpData[i].fInfo);
}
SkDELETE(fResourceCache2);
SkDELETE(fFontCache);
SkDELETE(fDrawBuffer);
SkDELETE(fDrawBufferVBAllocPool);
SkDELETE(fDrawBufferIBAllocPool);
fAARectRenderer->unref();
fOvalRenderer->unref();
fGpu->unref();
SkSafeUnref(fPathRendererChain);
SkSafeUnref(fSoftwarePathRenderer);
}
void GrContext::abandonContext() {
// abandon first to so destructors
// don't try to free the resources in the API.
fResourceCache2->abandonAll();
fGpu->contextAbandoned();
// a path renderer may be holding onto resources that
// are now unusable
SkSafeSetNull(fPathRendererChain);
SkSafeSetNull(fSoftwarePathRenderer);
delete fDrawBuffer;
fDrawBuffer = NULL;
delete fDrawBufferVBAllocPool;
fDrawBufferVBAllocPool = NULL;
delete fDrawBufferIBAllocPool;
fDrawBufferIBAllocPool = NULL;
fAARectRenderer->reset();
fOvalRenderer->reset();
fFontCache->freeAll();
fLayerCache->freeAll();
}
void GrContext::resetContext(uint32_t state) {
fGpu->markContextDirty(state);
}
void GrContext::freeGpuResources() {
this->flush();
if (fDrawBuffer) {
fDrawBuffer->purgeResources();
}
fAARectRenderer->reset();
fOvalRenderer->reset();
fFontCache->freeAll();
fLayerCache->freeAll();
// a path renderer may be holding onto resources
SkSafeSetNull(fPathRendererChain);
SkSafeSetNull(fSoftwarePathRenderer);
}
void GrContext::getResourceCacheUsage(int* resourceCount, size_t* resourceBytes) const {
if (resourceCount) {
*resourceCount = fResourceCache2->getBudgetedResourceCount();
}
if (resourceBytes) {
*resourceBytes = fResourceCache2->getBudgetedResourceBytes();
}
}
GrTextContext* GrContext::createTextContext(GrRenderTarget* renderTarget,
const SkDeviceProperties&
leakyProperties,
bool enableDistanceFieldFonts) {
if (fGpu->caps()->pathRenderingSupport() && renderTarget->getStencilBuffer() &&
renderTarget->isMultisampled()) {
return GrStencilAndCoverTextContext::Create(this, leakyProperties);
}
return GrDistanceFieldTextContext::Create(this, leakyProperties, enableDistanceFieldFonts);
}
////////////////////////////////////////////////////////////////////////////////
GrTexture* GrContext::findAndRefTexture(const GrSurfaceDesc& desc,
const GrCacheID& cacheID,
const GrTextureParams* params) {
GrResourceKey resourceKey = GrTexturePriv::ComputeKey(fGpu, params, desc, cacheID);
GrGpuResource* resource = this->findAndRefCachedResource(resourceKey);
if (resource) {
SkASSERT(static_cast<GrSurface*>(resource)->asTexture());
return static_cast<GrSurface*>(resource)->asTexture();
}
return NULL;
}
bool GrContext::isTextureInCache(const GrSurfaceDesc& desc,
const GrCacheID& cacheID,
const GrTextureParams* params) const {
GrResourceKey resourceKey = GrTexturePriv::ComputeKey(fGpu, params, desc, cacheID);
return fResourceCache2->hasContentKey(resourceKey);
}
void GrContext::addStencilBuffer(GrStencilBuffer* sb) {
// TODO: Make GrStencilBuffers use the scratch mechanism rather than content keys.
ASSERT_OWNED_RESOURCE(sb);
GrResourceKey resourceKey = GrStencilBuffer::ComputeKey(sb->width(),
sb->height(),
sb->numSamples());
SkAssertResult(sb->cacheAccess().setContentKey(resourceKey));
}
GrStencilBuffer* GrContext::findAndRefStencilBuffer(int width, int height, int sampleCnt) {
GrResourceKey resourceKey = GrStencilBuffer::ComputeKey(width, height, sampleCnt);
GrGpuResource* resource = this->findAndRefCachedResource(resourceKey);
return static_cast<GrStencilBuffer*>(resource);
}
static void stretch_image(void* dst,
int dstW,
int dstH,
const void* src,
int srcW,
int srcH,
size_t bpp) {
SkFixed dx = (srcW << 16) / dstW;
SkFixed dy = (srcH << 16) / dstH;
SkFixed y = dy >> 1;
size_t dstXLimit = dstW*bpp;
for (int j = 0; j < dstH; ++j) {
SkFixed x = dx >> 1;
const uint8_t* srcRow = reinterpret_cast<const uint8_t *>(src) + (y>>16)*srcW*bpp;
uint8_t* dstRow = reinterpret_cast<uint8_t *>(dst) + j*dstW*bpp;
for (size_t i = 0; i < dstXLimit; i += bpp) {
memcpy(dstRow + i, srcRow + (x>>16)*bpp, bpp);
x += dx;
}
y += dy;
}
}
// The desired texture is NPOT and tiled but that isn't supported by
// the current hardware. Resize the texture to be a POT
GrTexture* GrContext::createResizedTexture(const GrSurfaceDesc& desc,
const GrCacheID& cacheID,
const void* srcData,
size_t rowBytes,
bool filter) {
SkAutoTUnref<GrTexture> clampedTexture(this->findAndRefTexture(desc, cacheID, NULL));
if (NULL == clampedTexture) {
clampedTexture.reset(this->createTexture(NULL, desc, cacheID, srcData, rowBytes));
if (NULL == clampedTexture) {
return NULL;
}
}
GrSurfaceDesc rtDesc = desc;
rtDesc.fFlags = rtDesc.fFlags |
kRenderTarget_GrSurfaceFlag |
kNoStencil_GrSurfaceFlag;
rtDesc.fWidth = GrNextPow2(desc.fWidth);
rtDesc.fHeight = GrNextPow2(desc.fHeight);
GrTexture* texture = fGpu->createTexture(rtDesc, NULL, 0);
if (texture) {
GrDrawState drawState;
drawState.setRenderTarget(texture->asRenderTarget());
// if filtering is not desired then we want to ensure all
// texels in the resampled image are copies of texels from
// the original.
GrTextureParams params(SkShader::kClamp_TileMode,
filter ? GrTextureParams::kBilerp_FilterMode :
GrTextureParams::kNone_FilterMode);
drawState.addColorTextureProcessor(clampedTexture, SkMatrix::I(), params);
drawState.setGeometryProcessor(
GrDefaultGeoProcFactory::CreateAndSetAttribs(
&drawState,
GrDefaultGeoProcFactory::kPosition_GPType |
GrDefaultGeoProcFactory::kLocalCoord_GPType))->unref();
GrDrawTarget::AutoReleaseGeometry arg(fDrawBuffer, 4, drawState.getVertexStride(), 0);
if (arg.succeeded()) {
SkPoint* verts = (SkPoint*) arg.vertices();
verts[0].setIRectFan(0, 0, texture->width(), texture->height(), 2 * sizeof(SkPoint));
verts[1].setIRectFan(0, 0, 1, 1, 2 * sizeof(SkPoint));
fDrawBuffer->drawNonIndexed(&drawState, kTriangleFan_GrPrimitiveType, 0, 4);
}
} else {
// TODO: Our CPU stretch doesn't filter. But we create separate
// stretched textures when the texture params is either filtered or
// not. Either implement filtered stretch blit on CPU or just create
// one when FBO case fails.
rtDesc.fFlags = kNone_GrSurfaceFlags;
// no longer need to clamp at min RT size.
rtDesc.fWidth = GrNextPow2(desc.fWidth);
rtDesc.fHeight = GrNextPow2(desc.fHeight);
// We shouldn't be resizing a compressed texture.
SkASSERT(!GrPixelConfigIsCompressed(desc.fConfig));
size_t bpp = GrBytesPerPixel(desc.fConfig);
GrAutoMalloc<128*128*4> stretchedPixels(bpp * rtDesc.fWidth * rtDesc.fHeight);
stretch_image(stretchedPixels.get(), rtDesc.fWidth, rtDesc.fHeight,
srcData, desc.fWidth, desc.fHeight, bpp);
size_t stretchedRowBytes = rtDesc.fWidth * bpp;
texture = fGpu->createTexture(rtDesc, stretchedPixels.get(), stretchedRowBytes);
SkASSERT(texture);
}
return texture;
}
GrTexture* GrContext::createTexture(const GrTextureParams* params,
const GrSurfaceDesc& desc,
const GrCacheID& cacheID,
const void* srcData,
size_t rowBytes,
GrResourceKey* cacheKey) {
GrResourceKey resourceKey = GrTexturePriv::ComputeKey(fGpu, params, desc, cacheID);
GrTexture* texture;
if (GrTexturePriv::NeedsResizing(resourceKey)) {
// We do not know how to resize compressed textures.
SkASSERT(!GrPixelConfigIsCompressed(desc.fConfig));
texture = this->createResizedTexture(desc, cacheID,
srcData, rowBytes,
GrTexturePriv::NeedsBilerp(resourceKey));
} else {
texture = fGpu->createTexture(desc, srcData, rowBytes);
}
if (texture) {
if (texture->cacheAccess().setContentKey(resourceKey)) {
if (cacheKey) {
*cacheKey = resourceKey;
}
} else {
texture->unref();
texture = NULL;
}
}
return texture;
}
GrTexture* GrContext::refScratchTexture(const GrSurfaceDesc& inDesc, ScratchTexMatch match,
bool calledDuringFlush) {
// kNoStencil has no meaning if kRT isn't set.
SkASSERT((inDesc.fFlags & kRenderTarget_GrSurfaceFlag) ||
!(inDesc.fFlags & kNoStencil_GrSurfaceFlag));
// Make sure caller has checked for renderability if kRT is set.
SkASSERT(!(inDesc.fFlags & kRenderTarget_GrSurfaceFlag) ||
this->isConfigRenderable(inDesc.fConfig, inDesc.fSampleCnt > 0));
SkTCopyOnFirstWrite<GrSurfaceDesc> desc(inDesc);
if (fGpu->caps()->reuseScratchTextures() || (desc->fFlags & kRenderTarget_GrSurfaceFlag)) {
GrSurfaceFlags origFlags = desc->fFlags;
if (kApprox_ScratchTexMatch == match) {
// bin by pow2 with a reasonable min
static const int MIN_SIZE = 16;
GrSurfaceDesc* wdesc = desc.writable();
wdesc->fWidth = SkTMax(MIN_SIZE, GrNextPow2(desc->fWidth));
wdesc->fHeight = SkTMax(MIN_SIZE, GrNextPow2(desc->fHeight));
}
do {
GrResourceKey key = GrTexturePriv::ComputeScratchKey(*desc);
uint32_t scratchFlags = 0;
if (calledDuringFlush) {
scratchFlags = GrResourceCache2::kRequireNoPendingIO_ScratchFlag;
} else if (!(desc->fFlags & kRenderTarget_GrSurfaceFlag)) {
// If it is not a render target then it will most likely be populated by
// writePixels() which will trigger a flush if the texture has pending IO.
scratchFlags = GrResourceCache2::kPreferNoPendingIO_ScratchFlag;
}
GrGpuResource* resource = fResourceCache2->findAndRefScratchResource(key, scratchFlags);
if (resource) {
return static_cast<GrSurface*>(resource)->asTexture();
}
if (kExact_ScratchTexMatch == match) {
break;
}
// We had a cache miss and we are in approx mode, relax the fit of the flags.
// We no longer try to reuse textures that were previously used as render targets in
// situations where no RT is needed; doing otherwise can confuse the video driver and
// cause significant performance problems in some cases.
if (desc->fFlags & kNoStencil_GrSurfaceFlag) {
desc.writable()->fFlags = desc->fFlags & ~kNoStencil_GrSurfaceFlag;
} else {
break;
}
} while (true);
desc.writable()->fFlags = origFlags;
}
GrTexture* texture = fGpu->createTexture(*desc, NULL, 0);
SkASSERT(NULL == texture ||
texture->cacheAccess().getScratchKey() == GrTexturePriv::ComputeScratchKey(*desc));
return texture;
}
void GrContext::OverBudgetCB(void* data) {
SkASSERT(data);
GrContext* context = reinterpret_cast<GrContext*>(data);
// Flush the InOrderDrawBuffer to possibly free up some textures
context->fFlushToReduceCacheSize = true;
}
GrTexture* GrContext::createUncachedTexture(const GrSurfaceDesc& descIn,
void* srcData,
size_t rowBytes) {
GrSurfaceDesc descCopy = descIn;
GrTexture* texture = fGpu->createTexture(descCopy, srcData, rowBytes);
if (texture) {
// TODO: It'd be nice to be able to do this before creation so we don't boot something
// out of the cache. We could temporarily boost the cache budget.
texture->cacheAccess().setBudgeted(false);
}
return texture;
}
void GrContext::getResourceCacheLimits(int* maxTextures, size_t* maxTextureBytes) const {
if (maxTextures) {
*maxTextures = fResourceCache2->getMaxResourceCount();
}
if (maxTextureBytes) {
*maxTextureBytes = fResourceCache2->getMaxResourceBytes();
}
}
void GrContext::setResourceCacheLimits(int maxTextures, size_t maxTextureBytes) {
fResourceCache2->setLimits(maxTextures, maxTextureBytes);
}
int GrContext::getMaxTextureSize() const {
return SkTMin(fGpu->caps()->maxTextureSize(), fMaxTextureSizeOverride);
}
int GrContext::getMaxRenderTargetSize() const {
return fGpu->caps()->maxRenderTargetSize();
}
int GrContext::getMaxSampleCount() const {
return fGpu->caps()->maxSampleCount();
}
///////////////////////////////////////////////////////////////////////////////
GrTexture* GrContext::wrapBackendTexture(const GrBackendTextureDesc& desc) {
return fGpu->wrapBackendTexture(desc);
}
GrRenderTarget* GrContext::wrapBackendRenderTarget(const GrBackendRenderTargetDesc& desc) {
return fGpu->wrapBackendRenderTarget(desc);
}
///////////////////////////////////////////////////////////////////////////////
bool GrContext::supportsIndex8PixelConfig(const GrTextureParams* params,
int width, int height) const {
const GrDrawTargetCaps* caps = fGpu->caps();
if (!caps->isConfigTexturable(kIndex_8_GrPixelConfig)) {
return false;
}
bool isPow2 = SkIsPow2(width) && SkIsPow2(height);
if (!isPow2) {
bool tiled = params && params->isTiled();
if (tiled && !caps->npotTextureTileSupport()) {
return false;
}
}
return true;
}
////////////////////////////////////////////////////////////////////////////////
void GrContext::clear(const SkIRect* rect,
const GrColor color,
bool canIgnoreRect,
GrRenderTarget* renderTarget) {
ASSERT_OWNED_RESOURCE(renderTarget);
SkASSERT(renderTarget);
AutoCheckFlush acf(this);
GR_CREATE_TRACE_MARKER_CONTEXT("GrContext::clear", this);
GrDrawTarget* target = this->prepareToDraw(NULL, NULL, &acf);
if (NULL == target) {
return;
}
target->clear(rect, color, canIgnoreRect, renderTarget);
}
void GrContext::drawPaint(const GrPaint& origPaint) {
// set rect to be big enough to fill the space, but not super-huge, so we
// don't overflow fixed-point implementations
SkRect r;
r.setLTRB(0, 0,
SkIntToScalar(getRenderTarget()->width()),
SkIntToScalar(getRenderTarget()->height()));
SkMatrix inverse;
SkTCopyOnFirstWrite<GrPaint> paint(origPaint);
AutoMatrix am;
GR_CREATE_TRACE_MARKER_CONTEXT("GrContext::drawPaint", this);
// We attempt to map r by the inverse matrix and draw that. mapRect will
// map the four corners and bound them with a new rect. This will not
// produce a correct result for some perspective matrices.
if (!this->getMatrix().hasPerspective()) {
if (!fViewMatrix.invert(&inverse)) {
SkDebugf("Could not invert matrix\n");
return;
}
inverse.mapRect(&r);
} else {
if (!am.setIdentity(this, paint.writable())) {
SkDebugf("Could not invert matrix\n");
return;
}
}
// by definition this fills the entire clip, no need for AA
if (paint->isAntiAlias()) {
paint.writable()->setAntiAlias(false);
}
this->drawRect(*paint, r);
}
#ifdef SK_DEVELOPER
void GrContext::dumpFontCache() const {
fFontCache->dump();
}
#endif
////////////////////////////////////////////////////////////////////////////////
/* create a triangle strip that strokes the specified triangle. There are 8
unique vertices, but we repreat the last 2 to close up. Alternatively we
could use an indices array, and then only send 8 verts, but not sure that
would be faster.
*/
static void setStrokeRectStrip(SkPoint verts[10], SkRect rect,
SkScalar width) {
const SkScalar rad = SkScalarHalf(width);
rect.sort();
verts[0].set(rect.fLeft + rad, rect.fTop + rad);
verts[1].set(rect.fLeft - rad, rect.fTop - rad);
verts[2].set(rect.fRight - rad, rect.fTop + rad);
verts[3].set(rect.fRight + rad, rect.fTop - rad);
verts[4].set(rect.fRight - rad, rect.fBottom - rad);
verts[5].set(rect.fRight + rad, rect.fBottom + rad);
verts[6].set(rect.fLeft + rad, rect.fBottom - rad);
verts[7].set(rect.fLeft - rad, rect.fBottom + rad);
verts[8] = verts[0];
verts[9] = verts[1];
}
static inline bool is_irect(const SkRect& r) {
return SkScalarIsInt(r.fLeft) && SkScalarIsInt(r.fTop) &&
SkScalarIsInt(r.fRight) && SkScalarIsInt(r.fBottom);
}
static bool apply_aa_to_rect(GrDrawTarget* target,
GrDrawState* ds,
SkRect* devBoundRect,
const SkRect& rect,
SkScalar strokeWidth,
const SkMatrix& combinedMatrix) {
if (!ds->canTweakAlphaForCoverage() && !ds->couldApplyCoverage(*target->caps())) {
#ifdef SK_DEBUG
//SkDebugf("Turning off AA to correctly apply blend.\n");
#endif
return false;
}
if (ds->getRenderTarget()->isMultisampled()) {
return false;
}
#if defined(SHADER_AA_FILL_RECT) || !defined(IGNORE_ROT_AA_RECT_OPT)
if (strokeWidth >= 0) {
#endif
if (!combinedMatrix.preservesAxisAlignment()) {
return false;
}
#if defined(SHADER_AA_FILL_RECT) || !defined(IGNORE_ROT_AA_RECT_OPT)
} else {
if (!combinedMatrix.preservesRightAngles()) {
return false;
}
}
#endif
combinedMatrix.mapRect(devBoundRect, rect);
if (strokeWidth < 0) {
return !is_irect(*devBoundRect);
}
return true;
}
static inline bool rect_contains_inclusive(const SkRect& rect, const SkPoint& point) {
return point.fX >= rect.fLeft && point.fX <= rect.fRight &&
point.fY >= rect.fTop && point.fY <= rect.fBottom;
}
void GrContext::drawRect(const GrPaint& paint,
const SkRect& rect,
const GrStrokeInfo* strokeInfo) {
if (strokeInfo && strokeInfo->isDashed()) {
SkPath path;
path.addRect(rect);
this->drawPath(paint, path, *strokeInfo);
return;
}
AutoCheckFlush acf(this);
GrDrawState drawState;
GrDrawTarget* target = this->prepareToDraw(&drawState, &paint, &acf);
if (NULL == target) {
return;
}
GR_CREATE_TRACE_MARKER("GrContext::drawRect", target);
SkScalar width = NULL == strokeInfo ? -1 : strokeInfo->getStrokeRec().getWidth();
SkMatrix matrix = drawState.getViewMatrix();
// Check if this is a full RT draw and can be replaced with a clear. We don't bother checking
// cases where the RT is fully inside a stroke.
if (width < 0) {
SkRect rtRect;
drawState.getRenderTarget()->getBoundsRect(&rtRect);
SkRect clipSpaceRTRect = rtRect;
bool checkClip = false;
if (this->getClip()) {
checkClip = true;
clipSpaceRTRect.offset(SkIntToScalar(this->getClip()->fOrigin.fX),
SkIntToScalar(this->getClip()->fOrigin.fY));
}
// Does the clip contain the entire RT?
if (!checkClip || target->getClip()->fClipStack->quickContains(clipSpaceRTRect)) {
SkMatrix invM;
if (!matrix.invert(&invM)) {
return;
}
// Does the rect bound the RT?
SkPoint srcSpaceRTQuad[4];
invM.mapRectToQuad(srcSpaceRTQuad, rtRect);
if (rect_contains_inclusive(rect, srcSpaceRTQuad[0]) &&
rect_contains_inclusive(rect, srcSpaceRTQuad[1]) &&
rect_contains_inclusive(rect, srcSpaceRTQuad[2]) &&
rect_contains_inclusive(rect, srcSpaceRTQuad[3])) {
// Will it blend?
GrColor clearColor;
if (paint.isOpaqueAndConstantColor(&clearColor)) {
target->clear(NULL, clearColor, true, fRenderTarget);
return;
}
}
}
}
SkRect devBoundRect;
bool needAA = paint.isAntiAlias() && !drawState.getRenderTarget()->isMultisampled();
bool doAA = needAA && apply_aa_to_rect(target, &drawState, &devBoundRect, rect, width, matrix);
if (doAA) {
GrDrawState::AutoViewMatrixRestore avmr;
if (!avmr.setIdentity(&drawState)) {
return;
}
if (width >= 0) {
const SkStrokeRec& strokeRec = strokeInfo->getStrokeRec();
fAARectRenderer->strokeAARect(target,
&drawState,
rect,
matrix,
devBoundRect,
strokeRec);
} else {
// filled AA rect
fAARectRenderer->fillAARect(target, &drawState, rect, matrix, devBoundRect);
}
return;
}
if (width >= 0) {
// TODO: consider making static vertex buffers for these cases.
// Hairline could be done by just adding closing vertex to
// unitSquareVertexBuffer()
static const int worstCaseVertCount = 10;
drawState.setDefaultVertexAttribs();
drawState.setGeometryProcessor(GrDefaultGeoProcFactory::Create(false))->unref();
GrDrawTarget::AutoReleaseGeometry geo(target,
worstCaseVertCount,
drawState.getVertexStride(),
0);
if (!geo.succeeded()) {
SkDebugf("Failed to get space for vertices!\n");
return;
}
GrPrimitiveType primType;
int vertCount;
SkPoint* vertex = geo.positions();
if (width > 0) {
vertCount = 10;
primType = kTriangleStrip_GrPrimitiveType;
setStrokeRectStrip(vertex, rect, width);
} else {
// hairline
vertCount = 5;
primType = kLineStrip_GrPrimitiveType;
vertex[0].set(rect.fLeft, rect.fTop);
vertex[1].set(rect.fRight, rect.fTop);
vertex[2].set(rect.fRight, rect.fBottom);
vertex[3].set(rect.fLeft, rect.fBottom);
vertex[4].set(rect.fLeft, rect.fTop);
}
target->drawNonIndexed(&drawState, primType, 0, vertCount);
} else {
// filled BW rect
target->drawSimpleRect(&drawState, rect);
}
}
void GrContext::drawRectToRect(const GrPaint& paint,
const SkRect& dstRect,
const SkRect& localRect,
const SkMatrix* localMatrix) {
AutoCheckFlush acf(this);
GrDrawState drawState;
GrDrawTarget* target = this->prepareToDraw(&drawState, &paint, &acf);
if (NULL == target) {
return;
}
GR_CREATE_TRACE_MARKER("GrContext::drawRectToRect", target);
target->drawRect(&drawState, dstRect, &localRect, localMatrix);
}
static void set_vertex_attributes(GrDrawState* drawState,
const SkPoint* texCoords,
const GrColor* colors,
int* colorOffset,
int* texOffset) {
*texOffset = -1;
*colorOffset = -1;
uint32_t flags = GrDefaultGeoProcFactory::kPosition_GPType;
if (texCoords && colors) {
*colorOffset = sizeof(SkPoint);
*texOffset = sizeof(SkPoint) + sizeof(GrColor);
flags |= GrDefaultGeoProcFactory::kColor_GPType |
GrDefaultGeoProcFactory::kLocalCoord_GPType;
} else if (texCoords) {
*texOffset = sizeof(SkPoint);
flags |= GrDefaultGeoProcFactory::kLocalCoord_GPType;
} else if (colors) {
*colorOffset = sizeof(SkPoint);
flags |= GrDefaultGeoProcFactory::kColor_GPType;
}
drawState->setGeometryProcessor(GrDefaultGeoProcFactory::CreateAndSetAttribs(drawState,
flags))->unref();
}
void GrContext::drawVertices(const GrPaint& paint,
GrPrimitiveType primitiveType,
int vertexCount,
const SkPoint positions[],
const SkPoint texCoords[],
const GrColor colors[],
const uint16_t indices[],
int indexCount) {
AutoCheckFlush acf(this);
GrDrawState drawState;
GrDrawTarget::AutoReleaseGeometry geo; // must be inside AutoCheckFlush scope
GrDrawTarget* target = this->prepareToDraw(&drawState, &paint, &acf);
if (NULL == target) {
return;
}
GR_CREATE_TRACE_MARKER("GrContext::drawVertices", target);
int colorOffset = -1, texOffset = -1;
set_vertex_attributes(&drawState, texCoords, colors, &colorOffset, &texOffset);
size_t vertexStride = drawState.getVertexStride();
if (!geo.set(target, vertexCount, vertexStride, indexCount)) {
SkDebugf("Failed to get space for vertices!\n");
return;
}
void* curVertex = geo.vertices();
for (int i = 0; i < vertexCount; ++i) {
*((SkPoint*)curVertex) = positions[i];
if (texOffset >= 0) {
*(SkPoint*)((intptr_t)curVertex + texOffset) = texCoords[i];
}
if (colorOffset >= 0) {
*(GrColor*)((intptr_t)curVertex + colorOffset) = colors[i];
}
curVertex = (void*)((intptr_t)curVertex + vertexStride);
}
// we don't currently apply offscreen AA to this path. Need improved
// management of GrDrawTarget's geometry to avoid copying points per-tile.
if (indices) {
uint16_t* curIndex = (uint16_t*)geo.indices();
for (int i = 0; i < indexCount; ++i) {
curIndex[i] = indices[i];
}
target->drawIndexed(&drawState, primitiveType, 0, 0, vertexCount, indexCount);
} else {
target->drawNonIndexed(&drawState, primitiveType, 0, vertexCount);
}
}
///////////////////////////////////////////////////////////////////////////////
void GrContext::drawRRect(const GrPaint& paint,
const SkRRect& rrect,
const GrStrokeInfo& strokeInfo) {
if (rrect.isEmpty()) {
return;
}
if (strokeInfo.isDashed()) {
SkPath path;
path.addRRect(rrect);
this->drawPath(paint, path, strokeInfo);
return;
}
AutoCheckFlush acf(this);
GrDrawState drawState;
GrDrawTarget* target = this->prepareToDraw(&drawState, &paint, &acf);
if (NULL == target) {
return;
}
GR_CREATE_TRACE_MARKER("GrContext::drawRRect", target);
const SkStrokeRec& strokeRec = strokeInfo.getStrokeRec();
if (!fOvalRenderer->drawRRect(target, &drawState, this, paint.isAntiAlias(), rrect,
strokeRec)) {
SkPath path;
path.addRRect(rrect);
this->internalDrawPath(target, &drawState, paint.isAntiAlias(), path, strokeInfo);
}
}
///////////////////////////////////////////////////////////////////////////////
void GrContext::drawDRRect(const GrPaint& paint,
const SkRRect& outer,
const SkRRect& inner) {
if (outer.isEmpty()) {
return;
}
AutoCheckFlush acf(this);
GrDrawState drawState;
GrDrawTarget* target = this->prepareToDraw(&drawState, &paint, &acf);
GR_CREATE_TRACE_MARKER("GrContext::drawDRRect", target);
if (!fOvalRenderer->drawDRRect(target, &drawState, this, paint.isAntiAlias(), outer, inner)) {
SkPath path;
path.addRRect(inner);
path.addRRect(outer);
path.setFillType(SkPath::kEvenOdd_FillType);
GrStrokeInfo fillRec(SkStrokeRec::kFill_InitStyle);
this->internalDrawPath(target, &drawState, paint.isAntiAlias(), path, fillRec);
}
}
///////////////////////////////////////////////////////////////////////////////
void GrContext::drawOval(const GrPaint& paint,
const SkRect& oval,
const GrStrokeInfo& strokeInfo) {
if (oval.isEmpty()) {
return;
}
if (strokeInfo.isDashed()) {
SkPath path;
path.addOval(oval);
this->drawPath(paint, path, strokeInfo);
return;
}
AutoCheckFlush acf(this);
GrDrawState drawState;
GrDrawTarget* target = this->prepareToDraw(&drawState, &paint, &acf);
if (NULL == target) {
return;
}
GR_CREATE_TRACE_MARKER("GrContext::drawOval", target);
const SkStrokeRec& strokeRec = strokeInfo.getStrokeRec();
if (!fOvalRenderer->drawOval(target, &drawState, this, paint.isAntiAlias(), oval, strokeRec)) {
SkPath path;
path.addOval(oval);
this->internalDrawPath(target, &drawState, paint.isAntiAlias(), path, strokeInfo);
}
}
// Can 'path' be drawn as a pair of filled nested rectangles?
static bool is_nested_rects(GrDrawTarget* target,
GrDrawState* drawState,
const SkPath& path,
const SkStrokeRec& stroke,
SkRect rects[2]) {
SkASSERT(stroke.isFillStyle());
if (path.isInverseFillType()) {
return false;
}
// TODO: this restriction could be lifted if we were willing to apply
// the matrix to all the points individually rather than just to the rect
if (!drawState->getViewMatrix().preservesAxisAlignment()) {
return false;
}
if (!drawState->canTweakAlphaForCoverage() && !drawState->couldApplyCoverage(*target->caps())) {
return false;
}
SkPath::Direction dirs[2];
if (!path.isNestedRects(rects, dirs)) {
return false;
}
if (SkPath::kWinding_FillType == path.getFillType() && dirs[0] == dirs[1]) {
// The two rects need to be wound opposite to each other
return false;
}
// Right now, nested rects where the margin is not the same width
// all around do not render correctly
const SkScalar* outer = rects[0].asScalars();
const SkScalar* inner = rects[1].asScalars();
bool allEq = true;
SkScalar margin = SkScalarAbs(outer[0] - inner[0]);
bool allGoE1 = margin >= SK_Scalar1;
for (int i = 1; i < 4; ++i) {
SkScalar temp = SkScalarAbs(outer[i] - inner[i]);
if (temp < SK_Scalar1) {
allGoE1 = false;
}
if (!SkScalarNearlyEqual(margin, temp)) {
allEq = false;
}
}
return allEq || allGoE1;
}
void GrContext::drawPath(const GrPaint& paint, const SkPath& path, const GrStrokeInfo& strokeInfo) {
if (path.isEmpty()) {
if (path.isInverseFillType()) {
this->drawPaint(paint);
}
return;
}
if (strokeInfo.isDashed()) {
SkPoint pts[2];
if (path.isLine(pts)) {
AutoCheckFlush acf(this);
GrDrawState drawState;
GrDrawTarget* target = this->prepareToDraw(&drawState, &paint, &acf);
if (NULL == target) {
return;
};
SkMatrix origViewMatrix = drawState.getViewMatrix();
GrDrawState::AutoViewMatrixRestore avmr;
if (avmr.setIdentity(&drawState)) {
if (GrDashingEffect::DrawDashLine(fGpu, target, &drawState, pts, paint,
strokeInfo, origViewMatrix)) {
return;
}
}
}
// Filter dashed path into new path with the dashing applied
const SkPathEffect::DashInfo& info = strokeInfo.getDashInfo();
SkTLazy<SkPath> effectPath;
GrStrokeInfo newStrokeInfo(strokeInfo, false);
SkStrokeRec* stroke = newStrokeInfo.getStrokeRecPtr();
if (SkDashPath::FilterDashPath(effectPath.init(), path, stroke, NULL, info)) {
this->drawPath(paint, *effectPath.get(), newStrokeInfo);
return;
}
this->drawPath(paint, path, newStrokeInfo);
return;
}
// Note that internalDrawPath may sw-rasterize the path into a scratch texture.
// Scratch textures can be recycled after they are returned to the texture
// cache. This presents a potential hazard for buffered drawing. However,
// the writePixels that uploads to the scratch will perform a flush so we're
// OK.
AutoCheckFlush acf(this);
GrDrawState drawState;
GrDrawTarget* target = this->prepareToDraw(&drawState, &paint, &acf);
if (NULL == target) {
return;
}
GR_CREATE_TRACE_MARKER1("GrContext::drawPath", target, "Is Convex", path.isConvex());
const SkStrokeRec& strokeRec = strokeInfo.getStrokeRec();
bool useCoverageAA = paint.isAntiAlias() && !drawState.getRenderTarget()->isMultisampled();
if (useCoverageAA && strokeRec.getWidth() < 0 && !path.isConvex()) {
// Concave AA paths are expensive - try to avoid them for special cases
SkRect rects[2];
if (is_nested_rects(target, &drawState, path, strokeRec, rects)) {
SkMatrix origViewMatrix = drawState.getViewMatrix();
GrDrawState::AutoViewMatrixRestore avmr;
if (!avmr.setIdentity(&drawState)) {
return;
}
fAARectRenderer->fillAANestedRects(target, &drawState, rects, origViewMatrix);
return;
}
}
SkRect ovalRect;
bool isOval = path.isOval(&ovalRect);
if (!isOval || path.isInverseFillType()
|| !fOvalRenderer->drawOval(target, &drawState, this, paint.isAntiAlias(), ovalRect,
strokeRec)) {
this->internalDrawPath(target, &drawState, paint.isAntiAlias(), path, strokeInfo);
}
}
void GrContext::internalDrawPath(GrDrawTarget* target,
GrDrawState* drawState,
bool useAA,
const SkPath& path,
const GrStrokeInfo& strokeInfo) {
SkASSERT(!path.isEmpty());
GR_CREATE_TRACE_MARKER("GrContext::internalDrawPath", target);
// An Assumption here is that path renderer would use some form of tweaking
// the src color (either the input alpha or in the frag shader) to implement
// aa. If we have some future driver-mojo path AA that can do the right
// thing WRT to the blend then we'll need some query on the PR.
bool useCoverageAA = useAA &&
!drawState->getRenderTarget()->isMultisampled() &&
drawState->couldApplyCoverage(*target->caps());
GrPathRendererChain::DrawType type =
useCoverageAA ? GrPathRendererChain::kColorAntiAlias_DrawType :
GrPathRendererChain::kColor_DrawType;
const SkPath* pathPtr = &path;
SkTLazy<SkPath> tmpPath;
SkTCopyOnFirstWrite<SkStrokeRec> stroke(strokeInfo.getStrokeRec());
// Try a 1st time without stroking the path and without allowing the SW renderer
GrPathRenderer* pr = this->getPathRenderer(target, drawState, *pathPtr, *stroke, false, type);
if (NULL == pr) {
if (!GrPathRenderer::IsStrokeHairlineOrEquivalent(*stroke, this->getMatrix(), NULL)) {
// It didn't work the 1st time, so try again with the stroked path
if (stroke->applyToPath(tmpPath.init(), *pathPtr)) {
pathPtr = tmpPath.get();
stroke.writable()->setFillStyle();
if (pathPtr->isEmpty()) {
return;
}
}
}
// This time, allow SW renderer
pr = this->getPathRenderer(target, drawState, *pathPtr, *stroke, true, type);
}
if (NULL == pr) {
#ifdef SK_DEBUG
SkDebugf("Unable to find path renderer compatible with path.\n");
#endif
return;
}
pr->drawPath(target, drawState, *pathPtr, *stroke, useCoverageAA);
}
////////////////////////////////////////////////////////////////////////////////
void GrContext::flush(int flagsBitfield) {
if (NULL == fDrawBuffer) {
return;
}
if (kDiscard_FlushBit & flagsBitfield) {
fDrawBuffer->reset();
} else {
fDrawBuffer->flush();
}
fFlushToReduceCacheSize = false;
}
bool sw_convert_to_premul(GrPixelConfig srcConfig, int width, int height, size_t inRowBytes,
const void* inPixels, size_t outRowBytes, void* outPixels) {
SkSrcPixelInfo srcPI;
if (!GrPixelConfig2ColorType(srcConfig, &srcPI.fColorType)) {
return false;
}
srcPI.fAlphaType = kUnpremul_SkAlphaType;
srcPI.fPixels = inPixels;
srcPI.fRowBytes = inRowBytes;
SkDstPixelInfo dstPI;
dstPI.fColorType = srcPI.fColorType;
dstPI.fAlphaType = kPremul_SkAlphaType;
dstPI.fPixels = outPixels;
dstPI.fRowBytes = outRowBytes;
return srcPI.convertPixelsTo(&dstPI, width, height);
}
bool GrContext::writeSurfacePixels(GrSurface* surface,
int left, int top, int width, int height,
GrPixelConfig srcConfig, const void* buffer, size_t rowBytes,
uint32_t pixelOpsFlags) {
{
GrTexture* texture = NULL;
if (!(kUnpremul_PixelOpsFlag & pixelOpsFlags) && (texture = surface->asTexture()) &&
fGpu->canWriteTexturePixels(texture, srcConfig)) {
if (!(kDontFlush_PixelOpsFlag & pixelOpsFlags) &&
surface->surfacePriv().hasPendingIO()) {
this->flush();
}
return fGpu->writeTexturePixels(texture, left, top, width, height,
srcConfig, buffer, rowBytes);
// Don't need to check kFlushWrites_PixelOp here, we just did a direct write so the
// upload is already flushed.
}
}
// If we didn't do a direct texture write then we upload the pixels to a texture and draw.
GrRenderTarget* renderTarget = surface->asRenderTarget();
if (NULL == renderTarget) {
return false;
}
// We ignore the preferred config unless it is a R/B swap of the src config. In that case
// we will upload the original src data to a scratch texture but we will spoof it as the swapped
// config. This scratch will then have R and B swapped. We correct for this by swapping again
// when drawing the scratch to the dst using a conversion effect.
bool swapRAndB = false;
GrPixelConfig writeConfig = srcConfig;
if (GrPixelConfigSwapRAndB(srcConfig) ==
fGpu->preferredWritePixelsConfig(srcConfig, renderTarget->config())) {
writeConfig = GrPixelConfigSwapRAndB(srcConfig);
swapRAndB = true;
}
GrSurfaceDesc desc;
desc.fWidth = width;
desc.fHeight = height;
desc.fConfig = writeConfig;
SkAutoTUnref<GrTexture> texture(this->refScratchTexture(desc, kApprox_ScratchTexMatch));
if (!texture) {
return false;
}
SkAutoTUnref<const GrFragmentProcessor> fp;
SkMatrix textureMatrix;
textureMatrix.setIDiv(texture->width(), texture->height());
// allocate a tmp buffer and sw convert the pixels to premul
SkAutoSTMalloc<128 * 128, uint32_t> tmpPixels(0);
if (kUnpremul_PixelOpsFlag & pixelOpsFlags) {
if (!GrPixelConfigIs8888(srcConfig)) {
return false;
}
fp.reset(this->createUPMToPMEffect(texture, swapRAndB, textureMatrix));
// handle the unpremul step on the CPU if we couldn't create an effect to do it.
if (NULL == fp) {
size_t tmpRowBytes = 4 * width;
tmpPixels.reset(width * height);
if (!sw_convert_to_premul(srcConfig, width, height, rowBytes, buffer, tmpRowBytes,
tmpPixels.get())) {
return false;
}
rowBytes = tmpRowBytes;
buffer = tmpPixels.get();
}
}
if (NULL == fp) {
fp.reset(GrConfigConversionEffect::Create(texture,
swapRAndB,
GrConfigConversionEffect::kNone_PMConversion,
textureMatrix));
}
// Even if the client told us not to flush, we still flush here. The client may have known that
// writes to the original surface caused no data hazards, but they can't know that the scratch
// we just got is safe.
if (texture->surfacePriv().hasPendingIO()) {
this->flush();
}
if (!fGpu->writeTexturePixels(texture, 0, 0, width, height,
writeConfig, buffer, rowBytes)) {
return false;
}
SkMatrix matrix;
matrix.setTranslate(SkIntToScalar(left), SkIntToScalar(top));
// This function can be called in the midst of drawing another object (e.g., when uploading a
// SW-rasterized clip while issuing a draw). So we push the current geometry state before
// drawing a rect to the render target.
// The bracket ensures we pop the stack if we wind up flushing below.
{
GrDrawTarget* drawTarget = this->prepareToDraw(NULL, NULL, NULL);
GrDrawTarget::AutoGeometryPush agp(drawTarget);
GrDrawState drawState(matrix);
drawState.addColorProcessor(fp);
drawState.setRenderTarget(renderTarget);
drawTarget->drawSimpleRect(&drawState, SkRect::MakeWH(SkIntToScalar(width),
SkIntToScalar(height)));
}
if (kFlushWrites_PixelOp & pixelOpsFlags) {
this->flushSurfaceWrites(surface);
}
return true;
}
// toggles between RGBA and BGRA
static SkColorType toggle_colortype32(SkColorType ct) {
if (kRGBA_8888_SkColorType == ct) {
return kBGRA_8888_SkColorType;
} else {
SkASSERT(kBGRA_8888_SkColorType == ct);
return kRGBA_8888_SkColorType;
}
}
bool GrContext::readRenderTargetPixels(GrRenderTarget* target,
int left, int top, int width, int height,
GrPixelConfig dstConfig, void* buffer, size_t rowBytes,
uint32_t flags) {
ASSERT_OWNED_RESOURCE(target);
SkASSERT(target);
if (!(kDontFlush_PixelOpsFlag & flags) && target->surfacePriv().hasPendingWrite()) {
this->flush();
}
// Determine which conversions have to be applied: flipY, swapRAnd, and/or unpremul.
// If fGpu->readPixels would incur a y-flip cost then we will read the pixels upside down. We'll
// either do the flipY by drawing into a scratch with a matrix or on the cpu after the read.
bool flipY = fGpu->readPixelsWillPayForYFlip(target, left, top,
width, height, dstConfig,
rowBytes);
// We ignore the preferred config if it is different than our config unless it is an R/B swap.
// In that case we'll perform an R and B swap while drawing to a scratch texture of the swapped
// config. Then we will call readPixels on the scratch with the swapped config. The swaps during
// the draw cancels out the fact that we call readPixels with a config that is R/B swapped from
// dstConfig.
GrPixelConfig readConfig = dstConfig;
bool swapRAndB = false;
if (GrPixelConfigSwapRAndB(dstConfig) ==
fGpu->preferredReadPixelsConfig(dstConfig, target->config())) {
readConfig = GrPixelConfigSwapRAndB(readConfig);
swapRAndB = true;
}
bool unpremul = SkToBool(kUnpremul_PixelOpsFlag & flags);
if (unpremul && !GrPixelConfigIs8888(dstConfig)) {
// The unpremul flag is only allowed for these two configs.
return false;
}
SkAutoTUnref<GrTexture> tempTexture;
// If the src is a texture and we would have to do conversions after read pixels, we instead
// do the conversions by drawing the src to a scratch texture. If we handle any of the
// conversions in the draw we set the corresponding bool to false so that we don't reapply it
// on the read back pixels.
GrTexture* src = target->asTexture();
if (src && (swapRAndB || unpremul || flipY)) {
// Make the scratch a render so we can read its pixels.
GrSurfaceDesc desc;
desc.fFlags = kRenderTarget_GrSurfaceFlag;
desc.fWidth = width;
desc.fHeight = height;
desc.fConfig = readConfig;
desc.fOrigin = kTopLeft_GrSurfaceOrigin;
// When a full read back is faster than a partial we could always make the scratch exactly
// match the passed rect. However, if we see many different size rectangles we will trash
// our texture cache and pay the cost of creating and destroying many textures. So, we only
// request an exact match when the caller is reading an entire RT.
ScratchTexMatch match = kApprox_ScratchTexMatch;
if (0 == left &&
0 == top &&
target->width() == width &&
target->height() == height &&
fGpu->fullReadPixelsIsFasterThanPartial()) {
match = kExact_ScratchTexMatch;
}
tempTexture.reset(this->refScratchTexture(desc, match));
if (tempTexture) {
// compute a matrix to perform the draw
SkMatrix textureMatrix;
textureMatrix.setTranslate(SK_Scalar1 *left, SK_Scalar1 *top);
textureMatrix.postIDiv(src->width(), src->height());
SkAutoTUnref<const GrFragmentProcessor> fp;
if (unpremul) {
fp.reset(this->createPMToUPMEffect(src, swapRAndB, textureMatrix));
if (fp) {
unpremul = false; // we no longer need to do this on CPU after the read back.
}
}
// If we failed to create a PM->UPM effect and have no other conversions to perform then
// there is no longer any point to using the scratch.
if (fp || flipY || swapRAndB) {
if (!fp) {
fp.reset(GrConfigConversionEffect::Create(
src, swapRAndB, GrConfigConversionEffect::kNone_PMConversion,
textureMatrix));
}
swapRAndB = false; // we will handle the swap in the draw.
// We protect the existing geometry here since it may not be
// clear to the caller that a draw operation (i.e., drawSimpleRect)
// can be invoked in this method
{
GrDrawTarget::AutoGeometryPush agp(fDrawBuffer);
GrDrawState drawState;
SkASSERT(fp);
drawState.addColorProcessor(fp);
drawState.setRenderTarget(tempTexture->asRenderTarget());
SkRect rect = SkRect::MakeWH(SkIntToScalar(width), SkIntToScalar(height));
fDrawBuffer->drawSimpleRect(&drawState, rect);
// we want to read back from the scratch's origin
left = 0;
top = 0;
target = tempTexture->asRenderTarget();
}
this->flushSurfaceWrites(target);
}
}
}
if (!fGpu->readPixels(target,
left, top, width, height,
readConfig, buffer, rowBytes)) {
return false;
}
// Perform any conversions we weren't able to perform using a scratch texture.
if (unpremul || swapRAndB) {
SkDstPixelInfo dstPI;
if (!GrPixelConfig2ColorType(dstConfig, &dstPI.fColorType)) {
return false;
}
dstPI.fAlphaType = kUnpremul_SkAlphaType;
dstPI.fPixels = buffer;
dstPI.fRowBytes = rowBytes;
SkSrcPixelInfo srcPI;
srcPI.fColorType = swapRAndB ? toggle_colortype32(dstPI.fColorType) : dstPI.fColorType;
srcPI.fAlphaType = kPremul_SkAlphaType;
srcPI.fPixels = buffer;
srcPI.fRowBytes = rowBytes;
return srcPI.convertPixelsTo(&dstPI, width, height);
}
return true;
}
void GrContext::prepareSurfaceForExternalRead(GrSurface* surface) {
SkASSERT(surface);
ASSERT_OWNED_RESOURCE(surface);
if (surface->surfacePriv().hasPendingIO()) {
this->flush();
}
GrRenderTarget* rt = surface->asRenderTarget();
if (fGpu && rt) {
fGpu->resolveRenderTarget(rt);
}
}
void GrContext::discardRenderTarget(GrRenderTarget* renderTarget) {
SkASSERT(renderTarget);
ASSERT_OWNED_RESOURCE(renderTarget);
AutoCheckFlush acf(this);
GrDrawTarget* target = this->prepareToDraw(NULL, NULL, &acf);
if (NULL == target) {
return;
}
target->discard(renderTarget);
}
void GrContext::copySurface(GrSurface* dst, GrSurface* src, const SkIRect& srcRect,
const SkIPoint& dstPoint, uint32_t pixelOpsFlags) {
if (NULL == src || NULL == dst) {
return;
}
ASSERT_OWNED_RESOURCE(src);
ASSERT_OWNED_RESOURCE(dst);
// Since we're going to the draw target and not GPU, no need to check kNoFlush
// here.
GrDrawTarget* target = this->prepareToDraw(NULL, NULL, NULL);
if (NULL == target) {
return;
}
target->copySurface(dst, src, srcRect, dstPoint);
if (kFlushWrites_PixelOp & pixelOpsFlags) {
this->flush();
}
}
void GrContext::flushSurfaceWrites(GrSurface* surface) {
if (surface->surfacePriv().hasPendingWrite()) {
this->flush();
}
}
GrDrawTarget* GrContext::prepareToDraw(GrDrawState* ds,
const GrPaint* paint,
const AutoCheckFlush* acf) {
if (NULL == fGpu) {
return NULL;
}
ASSERT_OWNED_RESOURCE(fRenderTarget.get());
if (ds) {
if (paint) {
SkASSERT(acf);
ds->setFromPaint(*paint, fViewMatrix, fRenderTarget.get());
#if GR_DEBUG_PARTIAL_COVERAGE_CHECK
if ((paint->hasMask() || 0xff != paint->fCoverage) &&
!fDrawState->couldApplyCoverage(fGpu->caps())) {
SkDebugf("Partial pixel coverage will be incorrectly blended.\n");
}
#endif
// Clear any vertex attributes configured for the previous use of the
// GrDrawState which can effect which blend optimizations are in effect.
ds->setDefaultVertexAttribs();
} else {
ds->reset(fViewMatrix);
ds->setRenderTarget(fRenderTarget.get());
}
ds->setState(GrDrawState::kClip_StateBit, fClip && !fClip->fClipStack->isWideOpen());
}
fDrawBuffer->setClip(fClip);
return fDrawBuffer;
}
/*
* This method finds a path renderer that can draw the specified path on
* the provided target.
* Due to its expense, the software path renderer has split out so it can
* can be individually allowed/disallowed via the "allowSW" boolean.
*/
GrPathRenderer* GrContext::getPathRenderer(const GrDrawTarget* target,
const GrDrawState* drawState,
const SkPath& path,
const SkStrokeRec& stroke,
bool allowSW,
GrPathRendererChain::DrawType drawType,
GrPathRendererChain::StencilSupport* stencilSupport) {
if (NULL == fPathRendererChain) {
fPathRendererChain = SkNEW_ARGS(GrPathRendererChain, (this));
}
GrPathRenderer* pr = fPathRendererChain->getPathRenderer(target,
drawState,
path,
stroke,
drawType,
stencilSupport);
if (NULL == pr && allowSW) {
if (NULL == fSoftwarePathRenderer) {
fSoftwarePathRenderer = SkNEW_ARGS(GrSoftwarePathRenderer, (this));
}
pr = fSoftwarePathRenderer;
}
return pr;
}
////////////////////////////////////////////////////////////////////////////////
bool GrContext::isConfigRenderable(GrPixelConfig config, bool withMSAA) const {
return fGpu->caps()->isConfigRenderable(config, withMSAA);
}
int GrContext::getRecommendedSampleCount(GrPixelConfig config,
SkScalar dpi) const {
if (!this->isConfigRenderable(config, true)) {
return 0;
}
int chosenSampleCount = 0;
if (fGpu->caps()->pathRenderingSupport()) {
if (dpi >= 250.0f) {
chosenSampleCount = 4;
} else {
chosenSampleCount = 16;
}
}
return chosenSampleCount <= fGpu->caps()->maxSampleCount() ?
chosenSampleCount : 0;
}
void GrContext::setupDrawBuffer() {
SkASSERT(NULL == fDrawBuffer);
SkASSERT(NULL == fDrawBufferVBAllocPool);
SkASSERT(NULL == fDrawBufferIBAllocPool);
fDrawBufferVBAllocPool =
SkNEW_ARGS(GrVertexBufferAllocPool, (fGpu, false,
DRAW_BUFFER_VBPOOL_BUFFER_SIZE,
DRAW_BUFFER_VBPOOL_PREALLOC_BUFFERS));
fDrawBufferIBAllocPool =
SkNEW_ARGS(GrIndexBufferAllocPool, (fGpu, false,
DRAW_BUFFER_IBPOOL_BUFFER_SIZE,
DRAW_BUFFER_IBPOOL_PREALLOC_BUFFERS));
fDrawBuffer = SkNEW_ARGS(GrInOrderDrawBuffer, (fGpu,
fDrawBufferVBAllocPool,
fDrawBufferIBAllocPool));
}
GrDrawTarget* GrContext::getTextTarget() {
return this->prepareToDraw(NULL, NULL, NULL);
}
const GrIndexBuffer* GrContext::getQuadIndexBuffer() const {
return fGpu->getQuadIndexBuffer();
}
namespace {
void test_pm_conversions(GrContext* ctx, int* pmToUPMValue, int* upmToPMValue) {
GrConfigConversionEffect::PMConversion pmToUPM;
GrConfigConversionEffect::PMConversion upmToPM;
GrConfigConversionEffect::TestForPreservingPMConversions(ctx, &pmToUPM, &upmToPM);
*pmToUPMValue = pmToUPM;
*upmToPMValue = upmToPM;
}
}
const GrFragmentProcessor* GrContext::createPMToUPMEffect(GrTexture* texture,
bool swapRAndB,
const SkMatrix& matrix) {
if (!fDidTestPMConversions) {
test_pm_conversions(this, &fPMToUPMConversion, &fUPMToPMConversion);
fDidTestPMConversions = true;
}
GrConfigConversionEffect::PMConversion pmToUPM =
static_cast<GrConfigConversionEffect::PMConversion>(fPMToUPMConversion);
if (GrConfigConversionEffect::kNone_PMConversion != pmToUPM) {
return GrConfigConversionEffect::Create(texture, swapRAndB, pmToUPM, matrix);
} else {
return NULL;
}
}
const GrFragmentProcessor* GrContext::createUPMToPMEffect(GrTexture* texture,
bool swapRAndB,
const SkMatrix& matrix) {
if (!fDidTestPMConversions) {
test_pm_conversions(this, &fPMToUPMConversion, &fUPMToPMConversion);
fDidTestPMConversions = true;
}
GrConfigConversionEffect::PMConversion upmToPM =
static_cast<GrConfigConversionEffect::PMConversion>(fUPMToPMConversion);
if (GrConfigConversionEffect::kNone_PMConversion != upmToPM) {
return GrConfigConversionEffect::Create(texture, swapRAndB, upmToPM, matrix);
} else {
return NULL;
}
}
void GrContext::addResourceToCache(const GrResourceKey& resourceKey, GrGpuResource* resource) {
resource->cacheAccess().setContentKey(resourceKey);
}
GrGpuResource* GrContext::findAndRefCachedResource(const GrResourceKey& resourceKey) {
return fResourceCache2->findAndRefContentResource(resourceKey);
}
void GrContext::addGpuTraceMarker(const GrGpuTraceMarker* marker) {
fGpu->addGpuTraceMarker(marker);
if (fDrawBuffer) {
fDrawBuffer->addGpuTraceMarker(marker);
}
}
void GrContext::removeGpuTraceMarker(const GrGpuTraceMarker* marker) {
fGpu->removeGpuTraceMarker(marker);
if (fDrawBuffer) {
fDrawBuffer->removeGpuTraceMarker(marker);
}
}
///////////////////////////////////////////////////////////////////////////////
#if GR_CACHE_STATS
void GrContext::printCacheStats() const {
fResourceCache2->printStats();
}
#endif
#if GR_GPU_STATS
const GrContext::GPUStats* GrContext::gpuStats() const {
return fGpu->gpuStats();
}
#endif