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gerrit-public.fairphone.software / platform / external / skia / 706f6212c60dd8861a0ae922a77c455a08360aa3 / . / src / gpu / GrContext.cpp
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/*
* 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 "GrBufferAllocPool.h"
#include "GrClipIterator.h"
#include "effects/GrConvolutionEffect.h"
#include "GrGpu.h"
#include "GrIndexBuffer.h"
#include "GrInOrderDrawBuffer.h"
#include "GrPathRenderer.h"
#include "GrPathUtils.h"
#include "GrResourceCache.h"
#include "GrStencilBuffer.h"
#include "GrTextStrike.h"
#include "SkTLazy.h"
#include "SkTrace.h"
#define DEFER_TEXT_RENDERING 1
#define DEFER_PATHS 1
#define BATCH_RECT_TO_RECT (1 && !GR_STATIC_RECT_VB)
#define MAX_BLUR_SIGMA 4.0f
// When we're using coverage AA but the blend is incompatible (given gpu
// limitations) should we disable AA or draw wrong?
#define DISABLE_COVERAGE_AA_FOR_BLEND 1
static const size_t MAX_TEXTURE_CACHE_COUNT = 256;
static const size_t MAX_TEXTURE_CACHE_BYTES = 16 * 1024 * 1024;
static const size_t DRAW_BUFFER_VBPOOL_BUFFER_SIZE = 1 << 15;
static const int DRAW_BUFFER_VBPOOL_PREALLOC_BUFFERS = 4;
// path rendering is the only thing we defer today that uses non-static indices
static const size_t DRAW_BUFFER_IBPOOL_BUFFER_SIZE = DEFER_PATHS ? 1 << 11 : 0;
static const int DRAW_BUFFER_IBPOOL_PREALLOC_BUFFERS = DEFER_PATHS ? 4 : 0;
#define ASSERT_OWNED_RESOURCE(R) GrAssert(!(R) || (R)->getContext() == this)
GrContext* GrContext::Create(GrEngine engine,
GrPlatform3DContext context3D) {
GrContext* ctx = NULL;
GrGpu* fGpu = GrGpu::Create(engine, context3D);
if (NULL != fGpu) {
ctx = new GrContext(fGpu);
fGpu->unref();
}
return ctx;
}
GrContext::~GrContext() {
this->flush();
delete fTextureCache;
delete fFontCache;
delete fDrawBuffer;
delete fDrawBufferVBAllocPool;
delete fDrawBufferIBAllocPool;
GrSafeUnref(fAAFillRectIndexBuffer);
GrSafeUnref(fAAStrokeRectIndexBuffer);
fGpu->unref();
GrSafeUnref(fPathRendererChain);
fDrawState->unref();
}
void GrContext::contextLost() {
contextDestroyed();
this->setupDrawBuffer();
}
void GrContext::contextDestroyed() {
// abandon first to so destructors
// don't try to free the resources in the API.
fGpu->abandonResources();
// a path renderer may be holding onto resources that
// are now unusable
GrSafeSetNull(fPathRendererChain);
delete fDrawBuffer;
fDrawBuffer = NULL;
delete fDrawBufferVBAllocPool;
fDrawBufferVBAllocPool = NULL;
delete fDrawBufferIBAllocPool;
fDrawBufferIBAllocPool = NULL;
GrSafeSetNull(fAAFillRectIndexBuffer);
GrSafeSetNull(fAAStrokeRectIndexBuffer);
fTextureCache->removeAll();
fFontCache->freeAll();
fGpu->markContextDirty();
}
void GrContext::resetContext() {
fGpu->markContextDirty();
}
void GrContext::freeGpuResources() {
this->flush();
fTextureCache->removeAll();
fFontCache->freeAll();
// a path renderer may be holding onto resources
GrSafeSetNull(fPathRendererChain);
}
size_t GrContext::getGpuTextureCacheBytes() const {
return fTextureCache->getCachedResourceBytes();
}
////////////////////////////////////////////////////////////////////////////////
int GrContext::PaintStageVertexLayoutBits(
const GrPaint& paint,
const bool hasTexCoords[GrPaint::kTotalStages]) {
int stageMask = paint.getActiveStageMask();
int layout = 0;
for (int i = 0; i < GrPaint::kTotalStages; ++i) {
if ((1 << i) & stageMask) {
if (NULL != hasTexCoords && hasTexCoords[i]) {
layout |= GrDrawTarget::StageTexCoordVertexLayoutBit(i, i);
} else {
layout |= GrDrawTarget::StagePosAsTexCoordVertexLayoutBit(i);
}
}
}
return layout;
}
////////////////////////////////////////////////////////////////////////////////
enum {
// flags for textures
kNPOTBit = 0x1,
kFilterBit = 0x2,
kScratchBit = 0x4,
// resource type
kTextureBit = 0x8,
kStencilBufferBit = 0x10
};
GrTexture* GrContext::TextureCacheEntry::texture() const {
if (NULL == fEntry) {
return NULL;
} else {
return (GrTexture*) fEntry->resource();
}
}
namespace {
// returns true if this is a "special" texture because of gpu NPOT limitations
bool gen_texture_key_values(const GrGpu* gpu,
const GrSamplerState* sampler,
GrContext::TextureKey clientKey,
int width,
int height,
int sampleCnt,
bool scratch,
uint32_t v[4]) {
GR_STATIC_ASSERT(sizeof(GrContext::TextureKey) == sizeof(uint64_t));
// we assume we only need 16 bits of width and height
// assert that texture creation will fail anyway if this assumption
// would cause key collisions.
GrAssert(gpu->getCaps().fMaxTextureSize <= SK_MaxU16);
v[0] = clientKey & 0xffffffffUL;
v[1] = (clientKey >> 32) & 0xffffffffUL;
v[2] = width | (height << 16);
v[3] = (sampleCnt << 24);
GrAssert(sampleCnt >= 0 && sampleCnt < 256);
if (!gpu->getCaps().fNPOTTextureTileSupport) {
bool isPow2 = GrIsPow2(width) && GrIsPow2(height);
bool tiled = NULL != sampler &&
((sampler->getWrapX() != GrSamplerState::kClamp_WrapMode) ||
(sampler->getWrapY() != GrSamplerState::kClamp_WrapMode));
if (tiled && !isPow2) {
v[3] |= kNPOTBit;
if (GrSamplerState::kNearest_Filter != sampler->getFilter()) {
v[3] |= kFilterBit;
}
}
}
if (scratch) {
v[3] |= kScratchBit;
}
v[3] |= kTextureBit;
return v[3] & kNPOTBit;
}
// we should never have more than one stencil buffer with same combo of
// (width,height,samplecount)
void gen_stencil_key_values(int width, int height,
int sampleCnt, uint32_t v[4]) {
v[0] = width;
v[1] = height;
v[2] = sampleCnt;
v[3] = kStencilBufferBit;
}
void gen_stencil_key_values(const GrStencilBuffer* sb,
uint32_t v[4]) {
gen_stencil_key_values(sb->width(), sb->height(),
sb->numSamples(), v);
}
void build_kernel(float sigma, float* kernel, int kernelWidth) {
int halfWidth = (kernelWidth - 1) / 2;
float sum = 0.0f;
float denom = 1.0f / (2.0f * sigma * sigma);
for (int i = 0; i < kernelWidth; ++i) {
float x = static_cast<float>(i - halfWidth);
// Note that the constant term (1/(sqrt(2*pi*sigma^2)) of the Gaussian
// is dropped here, since we renormalize the kernel below.
kernel[i] = sk_float_exp(- x * x * denom);
sum += kernel[i];
}
// Normalize the kernel
float scale = 1.0f / sum;
for (int i = 0; i < kernelWidth; ++i)
kernel[i] *= scale;
}
void scale_rect(SkRect* rect, float xScale, float yScale) {
rect->fLeft = SkScalarMul(rect->fLeft, SkFloatToScalar(xScale));
rect->fTop = SkScalarMul(rect->fTop, SkFloatToScalar(yScale));
rect->fRight = SkScalarMul(rect->fRight, SkFloatToScalar(xScale));
rect->fBottom = SkScalarMul(rect->fBottom, SkFloatToScalar(yScale));
}
float adjust_sigma(float sigma, int *scaleFactor, int *halfWidth,
int *kernelWidth) {
*scaleFactor = 1;
while (sigma > MAX_BLUR_SIGMA) {
*scaleFactor *= 2;
sigma *= 0.5f;
}
*halfWidth = static_cast<int>(ceilf(sigma * 3.0f));
*kernelWidth = *halfWidth * 2 + 1;
return sigma;
}
void apply_morphology(GrGpu* gpu,
GrTexture* texture,
const SkRect& rect,
int radius,
GrSamplerState::Filter filter,
GrSamplerState::FilterDirection direction) {
GrAssert(filter == GrSamplerState::kErode_Filter ||
filter == GrSamplerState::kDilate_Filter);
GrRenderTarget* target = gpu->drawState()->getRenderTarget();
GrDrawTarget::AutoStateRestore asr(gpu, GrDrawTarget::kReset_ASRInit);
GrDrawState* drawState = gpu->drawState();
drawState->setRenderTarget(target);
GrMatrix sampleM;
sampleM.setIDiv(texture->width(), texture->height());
drawState->sampler(0)->reset(GrSamplerState::kClamp_WrapMode, filter,
sampleM);
drawState->sampler(0)->setMorphologyRadius(radius);
drawState->sampler(0)->setFilterDirection(direction);
drawState->setTexture(0, texture);
gpu->drawSimpleRect(rect, NULL, 1 << 0);
}
void convolve(GrGpu* gpu,
GrTexture* texture,
const SkRect& rect,
const float* kernel,
int kernelWidth,
GrSamplerState::FilterDirection direction) {
GrRenderTarget* target = gpu->drawState()->getRenderTarget();
GrDrawTarget::AutoStateRestore asr(gpu, GrDrawTarget::kReset_ASRInit);
GrDrawState* drawState = gpu->drawState();
drawState->setRenderTarget(target);
GrMatrix sampleM;
sampleM.setIDiv(texture->width(), texture->height());
drawState->sampler(0)->reset(GrSamplerState::kClamp_WrapMode,
GrSamplerState::kConvolution_Filter,
sampleM);
drawState->sampler(0)->setCustomStage(
new GrConvolutionEffect(direction, kernelWidth, kernel));
drawState->setTexture(0, texture);
gpu->drawSimpleRect(rect, NULL, 1 << 0);
}
}
GrContext::TextureCacheEntry GrContext::findAndLockTexture(
TextureKey key,
int width,
int height,
const GrSamplerState* sampler) {
uint32_t v[4];
gen_texture_key_values(fGpu, sampler, key, width, height, 0, false, v);
GrResourceKey resourceKey(v);
return TextureCacheEntry(fTextureCache->findAndLock(resourceKey,
GrResourceCache::kNested_LockType));
}
bool GrContext::isTextureInCache(TextureKey key,
int width,
int height,
const GrSamplerState* sampler) const {
uint32_t v[4];
gen_texture_key_values(fGpu, sampler, key, width, height, 0, false, v);
GrResourceKey resourceKey(v);
return fTextureCache->hasKey(resourceKey);
}
GrResourceEntry* GrContext::addAndLockStencilBuffer(GrStencilBuffer* sb) {
ASSERT_OWNED_RESOURCE(sb);
uint32_t v[4];
gen_stencil_key_values(sb, v);
GrResourceKey resourceKey(v);
return fTextureCache->createAndLock(resourceKey, sb);
}
GrStencilBuffer* GrContext::findStencilBuffer(int width, int height,
int sampleCnt) {
uint32_t v[4];
gen_stencil_key_values(width, height, sampleCnt, v);
GrResourceKey resourceKey(v);
GrResourceEntry* entry = fTextureCache->findAndLock(resourceKey,
GrResourceCache::kSingle_LockType);
if (NULL != entry) {
GrStencilBuffer* sb = (GrStencilBuffer*) entry->resource();
return sb;
} else {
return NULL;
}
}
void GrContext::unlockStencilBuffer(GrResourceEntry* sbEntry) {
ASSERT_OWNED_RESOURCE(sbEntry->resource());
fTextureCache->unlock(sbEntry);
}
static void stretchImage(void* dst,
int dstW,
int dstH,
void* src,
int srcW,
int srcH,
int bpp) {
GrFixed dx = (srcW << 16) / dstW;
GrFixed dy = (srcH << 16) / dstH;
GrFixed y = dy >> 1;
int dstXLimit = dstW*bpp;
for (int j = 0; j < dstH; ++j) {
GrFixed x = dx >> 1;
void* srcRow = (uint8_t*)src + (y>>16)*srcW*bpp;
void* dstRow = (uint8_t*)dst + j*dstW*bpp;
for (int i = 0; i < dstXLimit; i += bpp) {
memcpy((uint8_t*) dstRow + i,
(uint8_t*) srcRow + (x>>16)*bpp,
bpp);
x += dx;
}
y += dy;
}
}
GrContext::TextureCacheEntry GrContext::createAndLockTexture(
TextureKey key,
const GrSamplerState* sampler,
const GrTextureDesc& desc,
void* srcData,
size_t rowBytes) {
SK_TRACE_EVENT0("GrContext::createAndLockTexture");
#if GR_DUMP_TEXTURE_UPLOAD
GrPrintf("GrContext::createAndLockTexture [%d %d]\n", desc.fWidth, desc.fHeight);
#endif
TextureCacheEntry entry;
uint32_t v[4];
bool special = gen_texture_key_values(fGpu, sampler, key,
desc.fWidth, desc.fHeight,
desc.fSampleCnt, false, v);
GrResourceKey resourceKey(v);
if (special) {
GrAssert(NULL != sampler);
TextureCacheEntry clampEntry = this->findAndLockTexture(key,
desc.fWidth,
desc.fHeight,
NULL);
if (NULL == clampEntry.texture()) {
clampEntry = this->createAndLockTexture(key, NULL, desc,
srcData, rowBytes);
GrAssert(NULL != clampEntry.texture());
if (NULL == clampEntry.texture()) {
return entry;
}
}
GrTextureDesc rtDesc = desc;
rtDesc.fFlags = rtDesc.fFlags |
kRenderTarget_GrTextureFlagBit |
kNoStencil_GrTextureFlagBit;
rtDesc.fWidth = GrNextPow2(GrMax(desc.fWidth, 64));
rtDesc.fHeight = GrNextPow2(GrMax(desc.fHeight, 64));
GrTexture* texture = fGpu->createTexture(rtDesc, NULL, 0);
if (NULL != texture) {
GrDrawTarget::AutoStateRestore asr(fGpu,
GrDrawTarget::kReset_ASRInit);
GrDrawState* drawState = fGpu->drawState();
drawState->setRenderTarget(texture->asRenderTarget());
drawState->setTexture(0, clampEntry.texture());
GrSamplerState::Filter filter;
// if filtering is not desired then we want to ensure all
// texels in the resampled image are copies of texels from
// the original.
if (GrSamplerState::kNearest_Filter == sampler->getFilter()) {
filter = GrSamplerState::kNearest_Filter;
} else {
filter = GrSamplerState::kBilinear_Filter;
}
drawState->sampler(0)->reset(GrSamplerState::kClamp_WrapMode,
filter);
static const GrVertexLayout layout =
GrDrawTarget::StageTexCoordVertexLayoutBit(0,0);
GrDrawTarget::AutoReleaseGeometry arg(fGpu, layout, 4, 0);
if (arg.succeeded()) {
GrPoint* verts = (GrPoint*) arg.vertices();
verts[0].setIRectFan(0, 0,
texture->width(),
texture->height(),
2*sizeof(GrPoint));
verts[1].setIRectFan(0, 0, 1, 1, 2*sizeof(GrPoint));
fGpu->drawNonIndexed(kTriangleFan_PrimitiveType,
0, 4);
entry.set(fTextureCache->createAndLock(resourceKey, texture));
}
texture->releaseRenderTarget();
} else {
// TODO: Our CPU stretch doesn't filter. But we create separate
// stretched textures when the sampler state is either filtered or
// not. Either implement filtered stretch blit on CPU or just create
// one when FBO case fails.
rtDesc.fFlags = kNone_GrTextureFlags;
// no longer need to clamp at min RT size.
rtDesc.fWidth = GrNextPow2(desc.fWidth);
rtDesc.fHeight = GrNextPow2(desc.fHeight);
int bpp = GrBytesPerPixel(desc.fConfig);
SkAutoSMalloc<128*128*4> stretchedPixels(bpp *
rtDesc.fWidth *
rtDesc.fHeight);
stretchImage(stretchedPixels.get(), rtDesc.fWidth, rtDesc.fHeight,
srcData, desc.fWidth, desc.fHeight, bpp);
size_t stretchedRowBytes = rtDesc.fWidth * bpp;
GrTexture* texture = fGpu->createTexture(rtDesc,
stretchedPixels.get(),
stretchedRowBytes);
GrAssert(NULL != texture);
entry.set(fTextureCache->createAndLock(resourceKey, texture));
}
fTextureCache->unlock(clampEntry.cacheEntry());
} else {
GrTexture* texture = fGpu->createTexture(desc, srcData, rowBytes);
if (NULL != texture) {
entry.set(fTextureCache->createAndLock(resourceKey, texture));
}
}
return entry;
}
namespace {
inline void gen_scratch_tex_key_values(const GrGpu* gpu,
const GrTextureDesc& desc,
uint32_t v[4]) {
// Instead of a client-provided key of the texture contents
// we create a key of from the descriptor.
GrContext::TextureKey descKey = (desc.fFlags << 8) |
((uint64_t) desc.fConfig << 32);
// this code path isn't friendly to tiling with NPOT restricitons
// We just pass ClampNoFilter()
gen_texture_key_values(gpu, NULL, descKey, desc.fWidth,
desc.fHeight, desc.fSampleCnt, true, v);
}
}
GrContext::TextureCacheEntry GrContext::lockScratchTexture(
const GrTextureDesc& inDesc,
ScratchTexMatch match) {
GrTextureDesc desc = inDesc;
if (kExact_ScratchTexMatch != match) {
// bin by pow2 with a reasonable min
static const int MIN_SIZE = 256;
desc.fWidth = GrMax(MIN_SIZE, GrNextPow2(desc.fWidth));
desc.fHeight = GrMax(MIN_SIZE, GrNextPow2(desc.fHeight));
}
GrResourceEntry* entry;
int origWidth = desc.fWidth;
int origHeight = desc.fHeight;
bool doubledW = false;
bool doubledH = false;
do {
uint32_t v[4];
gen_scratch_tex_key_values(fGpu, desc, v);
GrResourceKey key(v);
entry = fTextureCache->findAndLock(key,
GrResourceCache::kNested_LockType);
// if we miss, relax the fit of the flags...
// then try doubling width... then height.
if (NULL != entry || kExact_ScratchTexMatch == match) {
break;
}
if (!(desc.fFlags & kRenderTarget_GrTextureFlagBit)) {
desc.fFlags = desc.fFlags | kRenderTarget_GrTextureFlagBit;
} else if (desc.fFlags & kNoStencil_GrTextureFlagBit) {
desc.fFlags = desc.fFlags & ~kNoStencil_GrTextureFlagBit;
} else if (!doubledW) {
desc.fFlags = inDesc.fFlags;
desc.fWidth *= 2;
doubledW = true;
} else if (!doubledH) {
desc.fFlags = inDesc.fFlags;
desc.fWidth = origWidth;
desc.fHeight *= 2;
doubledH = true;
} else {
break;
}
} while (true);
if (NULL == entry) {
desc.fFlags = inDesc.fFlags;
desc.fWidth = origWidth;
desc.fHeight = origHeight;
GrTexture* texture = fGpu->createTexture(desc, NULL, 0);
if (NULL != texture) {
uint32_t v[4];
gen_scratch_tex_key_values(fGpu, desc, v);
GrResourceKey key(v);
entry = fTextureCache->createAndLock(key, texture);
}
}
// If the caller gives us the same desc/sampler twice we don't want
// to return the same texture the second time (unless it was previously
// released). So we detach the entry from the cache and reattach at release.
if (NULL != entry) {
fTextureCache->detach(entry);
}
return TextureCacheEntry(entry);
}
void GrContext::unlockTexture(TextureCacheEntry entry) {
ASSERT_OWNED_RESOURCE(entry.texture());
// If this is a scratch texture we detached it from the cache
// while it was locked (to avoid two callers simultaneously getting
// the same texture).
if (kScratchBit & entry.cacheEntry()->key().getValue32(3)) {
fTextureCache->reattachAndUnlock(entry.cacheEntry());
} else {
fTextureCache->unlock(entry.cacheEntry());
}
}
GrTexture* GrContext::createUncachedTexture(const GrTextureDesc& desc,
void* srcData,
size_t rowBytes) {
return fGpu->createTexture(desc, srcData, rowBytes);
}
void GrContext::getTextureCacheLimits(int* maxTextures,
size_t* maxTextureBytes) const {
fTextureCache->getLimits(maxTextures, maxTextureBytes);
}
void GrContext::setTextureCacheLimits(int maxTextures, size_t maxTextureBytes) {
fTextureCache->setLimits(maxTextures, maxTextureBytes);
}
int GrContext::getMaxTextureSize() const {
return fGpu->getCaps().fMaxTextureSize;
}
int GrContext::getMaxRenderTargetSize() const {
return fGpu->getCaps().fMaxRenderTargetSize;
}
///////////////////////////////////////////////////////////////////////////////
GrTexture* GrContext::createPlatformTexture(const GrPlatformTextureDesc& desc) {
return fGpu->createPlatformTexture(desc);
}
GrRenderTarget* GrContext::createPlatformRenderTarget(const GrPlatformRenderTargetDesc& desc) {
return fGpu->createPlatformRenderTarget(desc);
}
///////////////////////////////////////////////////////////////////////////////
bool GrContext::supportsIndex8PixelConfig(const GrSamplerState* sampler,
int width, int height) const {
const GrDrawTarget::Caps& caps = fGpu->getCaps();
if (!caps.f8BitPaletteSupport) {
return false;
}
bool isPow2 = GrIsPow2(width) && GrIsPow2(height);
if (!isPow2) {
bool tiled = NULL != sampler &&
(sampler->getWrapX() != GrSamplerState::kClamp_WrapMode ||
sampler->getWrapY() != GrSamplerState::kClamp_WrapMode);
if (tiled && !caps.fNPOTTextureTileSupport) {
return false;
}
}
return true;
}
////////////////////////////////////////////////////////////////////////////////
const GrClip& GrContext::getClip() const { return fGpu->getClip(); }
void GrContext::setClip(const GrClip& clip) {
fGpu->setClip(clip);
fDrawState->enableState(GrDrawState::kClip_StateBit);
}
void GrContext::setClip(const GrIRect& rect) {
GrClip clip;
clip.setFromIRect(rect);
fGpu->setClip(clip);
}
////////////////////////////////////////////////////////////////////////////////
void GrContext::clear(const GrIRect* rect, const GrColor color) {
this->flush();
fGpu->clear(rect, color);
}
void GrContext::drawPaint(const GrPaint& paint) {
// set rect to be big enough to fill the space, but not super-huge, so we
// don't overflow fixed-point implementations
GrRect r;
r.setLTRB(0, 0,
GrIntToScalar(getRenderTarget()->width()),
GrIntToScalar(getRenderTarget()->height()));
GrMatrix inverse;
SkTLazy<GrPaint> tmpPaint;
const GrPaint* p = &paint;
GrAutoMatrix am;
// 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 (!fDrawState->getViewInverse(&inverse)) {
GrPrintf("Could not invert matrix");
return;
}
inverse.mapRect(&r);
} else {
if (paint.getActiveMaskStageMask() || paint.getActiveStageMask()) {
if (!fDrawState->getViewInverse(&inverse)) {
GrPrintf("Could not invert matrix");
return;
}
tmpPaint.set(paint);
tmpPaint.get()->preConcatActiveSamplerMatrices(inverse);
p = tmpPaint.get();
}
am.set(this, GrMatrix::I());
}
// by definition this fills the entire clip, no need for AA
if (paint.fAntiAlias) {
if (!tmpPaint.isValid()) {
tmpPaint.set(paint);
p = tmpPaint.get();
}
GrAssert(p == tmpPaint.get());
tmpPaint.get()->fAntiAlias = false;
}
this->drawRect(*p, r);
}
////////////////////////////////////////////////////////////////////////////////
namespace {
inline bool disable_coverage_aa_for_blend(GrDrawTarget* target) {
return DISABLE_COVERAGE_AA_FOR_BLEND && !target->canApplyCoverage();
}
}
////////////////////////////////////////////////////////////////////////////////
/* 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(GrPoint verts[10], GrRect rect,
GrScalar width) {
const GrScalar rad = GrScalarHalf(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 void setInsetFan(GrPoint* pts, size_t stride,
const GrRect& r, GrScalar dx, GrScalar dy) {
pts->setRectFan(r.fLeft + dx, r.fTop + dy, r.fRight - dx, r.fBottom - dy, stride);
}
static const uint16_t gFillAARectIdx[] = {
0, 1, 5, 5, 4, 0,
1, 2, 6, 6, 5, 1,
2, 3, 7, 7, 6, 2,
3, 0, 4, 4, 7, 3,
4, 5, 6, 6, 7, 4,
};
int GrContext::aaFillRectIndexCount() const {
return GR_ARRAY_COUNT(gFillAARectIdx);
}
GrIndexBuffer* GrContext::aaFillRectIndexBuffer() {
if (NULL == fAAFillRectIndexBuffer) {
fAAFillRectIndexBuffer = fGpu->createIndexBuffer(sizeof(gFillAARectIdx),
false);
if (NULL != fAAFillRectIndexBuffer) {
#if GR_DEBUG
bool updated =
#endif
fAAFillRectIndexBuffer->updateData(gFillAARectIdx,
sizeof(gFillAARectIdx));
GR_DEBUGASSERT(updated);
}
}
return fAAFillRectIndexBuffer;
}
static const uint16_t gStrokeAARectIdx[] = {
0 + 0, 1 + 0, 5 + 0, 5 + 0, 4 + 0, 0 + 0,
1 + 0, 2 + 0, 6 + 0, 6 + 0, 5 + 0, 1 + 0,
2 + 0, 3 + 0, 7 + 0, 7 + 0, 6 + 0, 2 + 0,
3 + 0, 0 + 0, 4 + 0, 4 + 0, 7 + 0, 3 + 0,
0 + 4, 1 + 4, 5 + 4, 5 + 4, 4 + 4, 0 + 4,
1 + 4, 2 + 4, 6 + 4, 6 + 4, 5 + 4, 1 + 4,
2 + 4, 3 + 4, 7 + 4, 7 + 4, 6 + 4, 2 + 4,
3 + 4, 0 + 4, 4 + 4, 4 + 4, 7 + 4, 3 + 4,
0 + 8, 1 + 8, 5 + 8, 5 + 8, 4 + 8, 0 + 8,
1 + 8, 2 + 8, 6 + 8, 6 + 8, 5 + 8, 1 + 8,
2 + 8, 3 + 8, 7 + 8, 7 + 8, 6 + 8, 2 + 8,
3 + 8, 0 + 8, 4 + 8, 4 + 8, 7 + 8, 3 + 8,
};
int GrContext::aaStrokeRectIndexCount() const {
return GR_ARRAY_COUNT(gStrokeAARectIdx);
}
GrIndexBuffer* GrContext::aaStrokeRectIndexBuffer() {
if (NULL == fAAStrokeRectIndexBuffer) {
fAAStrokeRectIndexBuffer = fGpu->createIndexBuffer(sizeof(gStrokeAARectIdx),
false);
if (NULL != fAAStrokeRectIndexBuffer) {
#if GR_DEBUG
bool updated =
#endif
fAAStrokeRectIndexBuffer->updateData(gStrokeAARectIdx,
sizeof(gStrokeAARectIdx));
GR_DEBUGASSERT(updated);
}
}
return fAAStrokeRectIndexBuffer;
}
static GrVertexLayout aa_rect_layout(const GrDrawTarget* target,
bool useCoverage) {
GrVertexLayout layout = 0;
for (int s = 0; s < GrDrawState::kNumStages; ++s) {
if (NULL != target->getDrawState().getTexture(s)) {
layout |= GrDrawTarget::StagePosAsTexCoordVertexLayoutBit(s);
}
}
if (useCoverage) {
layout |= GrDrawTarget::kCoverage_VertexLayoutBit;
} else {
layout |= GrDrawTarget::kColor_VertexLayoutBit;
}
return layout;
}
void GrContext::fillAARect(GrDrawTarget* target,
const GrRect& devRect,
bool useVertexCoverage) {
GrVertexLayout layout = aa_rect_layout(target, useVertexCoverage);
size_t vsize = GrDrawTarget::VertexSize(layout);
GrDrawTarget::AutoReleaseGeometry geo(target, layout, 8, 0);
if (!geo.succeeded()) {
GrPrintf("Failed to get space for vertices!\n");
return;
}
GrIndexBuffer* indexBuffer = this->aaFillRectIndexBuffer();
if (NULL == indexBuffer) {
GrPrintf("Failed to create index buffer!\n");
return;
}
intptr_t verts = reinterpret_cast<intptr_t>(geo.vertices());
GrPoint* fan0Pos = reinterpret_cast<GrPoint*>(verts);
GrPoint* fan1Pos = reinterpret_cast<GrPoint*>(verts + 4 * vsize);
setInsetFan(fan0Pos, vsize, devRect, -GR_ScalarHalf, -GR_ScalarHalf);
setInsetFan(fan1Pos, vsize, devRect, GR_ScalarHalf, GR_ScalarHalf);
verts += sizeof(GrPoint);
for (int i = 0; i < 4; ++i) {
*reinterpret_cast<GrColor*>(verts + i * vsize) = 0;
}
GrColor innerColor;
if (useVertexCoverage) {
innerColor = 0xffffffff;
} else {
innerColor = target->getDrawState().getColor();
}
verts += 4 * vsize;
for (int i = 0; i < 4; ++i) {
*reinterpret_cast<GrColor*>(verts + i * vsize) = innerColor;
}
target->setIndexSourceToBuffer(indexBuffer);
target->drawIndexed(kTriangles_PrimitiveType, 0,
0, 8, this->aaFillRectIndexCount());
}
void GrContext::strokeAARect(GrDrawTarget* target,
const GrRect& devRect,
const GrVec& devStrokeSize,
bool useVertexCoverage) {
const GrScalar& dx = devStrokeSize.fX;
const GrScalar& dy = devStrokeSize.fY;
const GrScalar rx = GrMul(dx, GR_ScalarHalf);
const GrScalar ry = GrMul(dy, GR_ScalarHalf);
GrScalar spare;
{
GrScalar w = devRect.width() - dx;
GrScalar h = devRect.height() - dy;
spare = GrMin(w, h);
}
if (spare <= 0) {
GrRect r(devRect);
r.inset(-rx, -ry);
fillAARect(target, r, useVertexCoverage);
return;
}
GrVertexLayout layout = aa_rect_layout(target, useVertexCoverage);
size_t vsize = GrDrawTarget::VertexSize(layout);
GrDrawTarget::AutoReleaseGeometry geo(target, layout, 16, 0);
if (!geo.succeeded()) {
GrPrintf("Failed to get space for vertices!\n");
return;
}
GrIndexBuffer* indexBuffer = this->aaStrokeRectIndexBuffer();
if (NULL == indexBuffer) {
GrPrintf("Failed to create index buffer!\n");
return;
}
intptr_t verts = reinterpret_cast<intptr_t>(geo.vertices());
GrPoint* fan0Pos = reinterpret_cast<GrPoint*>(verts);
GrPoint* fan1Pos = reinterpret_cast<GrPoint*>(verts + 4 * vsize);
GrPoint* fan2Pos = reinterpret_cast<GrPoint*>(verts + 8 * vsize);
GrPoint* fan3Pos = reinterpret_cast<GrPoint*>(verts + 12 * vsize);
setInsetFan(fan0Pos, vsize, devRect, -rx - GR_ScalarHalf, -ry - GR_ScalarHalf);
setInsetFan(fan1Pos, vsize, devRect, -rx + GR_ScalarHalf, -ry + GR_ScalarHalf);
setInsetFan(fan2Pos, vsize, devRect, rx - GR_ScalarHalf, ry - GR_ScalarHalf);
setInsetFan(fan3Pos, vsize, devRect, rx + GR_ScalarHalf, ry + GR_ScalarHalf);
verts += sizeof(GrPoint);
for (int i = 0; i < 4; ++i) {
*reinterpret_cast<GrColor*>(verts + i * vsize) = 0;
}
GrColor innerColor;
if (useVertexCoverage) {
innerColor = 0xffffffff;
} else {
innerColor = target->getDrawState().getColor();
}
verts += 4 * vsize;
for (int i = 0; i < 8; ++i) {
*reinterpret_cast<GrColor*>(verts + i * vsize) = innerColor;
}
verts += 8 * vsize;
for (int i = 0; i < 8; ++i) {
*reinterpret_cast<GrColor*>(verts + i * vsize) = 0;
}
target->setIndexSourceToBuffer(indexBuffer);
target->drawIndexed(kTriangles_PrimitiveType,
0, 0, 16, aaStrokeRectIndexCount());
}
/**
* Returns true if the rects edges are integer-aligned.
*/
static bool isIRect(const GrRect& r) {
return GrScalarIsInt(r.fLeft) && GrScalarIsInt(r.fTop) &&
GrScalarIsInt(r.fRight) && GrScalarIsInt(r.fBottom);
}
static bool apply_aa_to_rect(GrDrawTarget* target,
const GrRect& rect,
GrScalar width,
const GrMatrix* matrix,
GrMatrix* combinedMatrix,
GrRect* devRect,
bool* useVertexCoverage) {
// we use a simple coverage ramp to do aa on axis-aligned rects
// we check if the rect will be axis-aligned, and the rect won't land on
// integer coords.
// we are keeping around the "tweak the alpha" trick because
// it is our only hope for the fixed-pipe implementation.
// In a shader implementation we can give a separate coverage input
// TODO: remove this ugliness when we drop the fixed-pipe impl
*useVertexCoverage = false;
if (!target->canTweakAlphaForCoverage()) {
if (disable_coverage_aa_for_blend(target)) {
#if GR_DEBUG
//GrPrintf("Turning off AA to correctly apply blend.\n");
#endif
return false;
} else {
*useVertexCoverage = true;
}
}
const GrDrawState& drawState = target->getDrawState();
if (drawState.getRenderTarget()->isMultisampled()) {
return false;
}
if (0 == width && target->willUseHWAALines()) {
return false;
}
if (!drawState.getViewMatrix().preservesAxisAlignment()) {
return false;
}
if (NULL != matrix &&
!matrix->preservesAxisAlignment()) {
return false;
}
*combinedMatrix = drawState.getViewMatrix();
if (NULL != matrix) {
combinedMatrix->preConcat(*matrix);
GrAssert(combinedMatrix->preservesAxisAlignment());
}
combinedMatrix->mapRect(devRect, rect);
devRect->sort();
if (width < 0) {
return !isIRect(*devRect);
} else {
return true;
}
}
void GrContext::drawRect(const GrPaint& paint,
const GrRect& rect,
GrScalar width,
const GrMatrix* matrix) {
SK_TRACE_EVENT0("GrContext::drawRect");
GrDrawTarget* target = this->prepareToDraw(paint, kUnbuffered_DrawCategory);
int stageMask = paint.getActiveStageMask();
GrRect devRect = rect;
GrMatrix combinedMatrix;
bool useVertexCoverage;
bool needAA = paint.fAntiAlias &&
!this->getRenderTarget()->isMultisampled();
bool doAA = needAA && apply_aa_to_rect(target, rect, width, matrix,
&combinedMatrix, &devRect,
&useVertexCoverage);
if (doAA) {
GrDrawTarget::AutoDeviceCoordDraw adcd(target, stageMask);
if (width >= 0) {
GrVec strokeSize;;
if (width > 0) {
strokeSize.set(width, width);
combinedMatrix.mapVectors(&strokeSize, 1);
strokeSize.setAbs(strokeSize);
} else {
strokeSize.set(GR_Scalar1, GR_Scalar1);
}
strokeAARect(target, devRect, strokeSize, useVertexCoverage);
} else {
fillAARect(target, devRect, useVertexCoverage);
}
return;
}
if (width >= 0) {
// TODO: consider making static vertex buffers for these cases.
// Hairline could be done by just adding closing vertex to
// unitSquareVertexBuffer()
GrVertexLayout layout = PaintStageVertexLayoutBits(paint, NULL);
static const int worstCaseVertCount = 10;
GrDrawTarget::AutoReleaseGeometry geo(target, layout, worstCaseVertCount, 0);
if (!geo.succeeded()) {
GrPrintf("Failed to get space for vertices!\n");
return;
}
GrPrimitiveType primType;
int vertCount;
GrPoint* vertex = geo.positions();
if (width > 0) {
vertCount = 10;
primType = kTriangleStrip_PrimitiveType;
setStrokeRectStrip(vertex, rect, width);
} else {
// hairline
vertCount = 5;
primType = kLineStrip_PrimitiveType;
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);
}
GrDrawState::AutoViewMatrixRestore avmr;
if (NULL != matrix) {
GrDrawState* drawState = target->drawState();
avmr.set(drawState);
drawState->preConcatViewMatrix(*matrix);
drawState->preConcatSamplerMatrices(stageMask, *matrix);
}
target->drawNonIndexed(primType, 0, vertCount);
} else {
#if GR_STATIC_RECT_VB
GrVertexLayout layout = PaintStageVertexLayoutBits(paint, NULL);
const GrVertexBuffer* sqVB = fGpu->getUnitSquareVertexBuffer();
if (NULL == sqVB) {
GrPrintf("Failed to create static rect vb.\n");
return;
}
target->setVertexSourceToBuffer(layout, sqVB);
GrDrawState* drawState = target->drawState();
GrDrawState::AutoViewMatrixRestore avmr(drawState);
GrMatrix m;
m.setAll(rect.width(), 0, rect.fLeft,
0, rect.height(), rect.fTop,
0, 0, GrMatrix::I()[8]);
if (NULL != matrix) {
m.postConcat(*matrix);
}
drawState->preConcatViewMatrix(m);
drawState->preConcatSamplerMatrices(stageMask, m);
target->drawNonIndexed(kTriangleFan_PrimitiveType, 0, 4);
#else
target->drawSimpleRect(rect, matrix, stageMask);
#endif
}
}
void GrContext::drawRectToRect(const GrPaint& paint,
const GrRect& dstRect,
const GrRect& srcRect,
const GrMatrix* dstMatrix,
const GrMatrix* srcMatrix) {
SK_TRACE_EVENT0("GrContext::drawRectToRect");
// srcRect refers to paint's first texture
if (NULL == paint.getTexture(0)) {
drawRect(paint, dstRect, -1, dstMatrix);
return;
}
GR_STATIC_ASSERT(!BATCH_RECT_TO_RECT || !GR_STATIC_RECT_VB);
#if GR_STATIC_RECT_VB
GrDrawTarget* target = this->prepareToDraw(paint, kUnbuffered_DrawCategory);
GrDrawState* drawState = target->drawState();
GrVertexLayout layout = PaintStageVertexLayoutBits(paint, NULL);
GrDrawState::AutoViewMatrixRestore avmr(drawState);
GrMatrix m;
m.setAll(dstRect.width(), 0, dstRect.fLeft,
0, dstRect.height(), dstRect.fTop,
0, 0, GrMatrix::I()[8]);
if (NULL != dstMatrix) {
m.postConcat(*dstMatrix);
}
drawState->preConcatViewMatrix(m);
// srcRect refers to first stage
int otherStageMask = paint.getActiveStageMask() &
(~(1 << GrPaint::kFirstTextureStage));
if (otherStageMask) {
drawState->preConcatSamplerMatrices(otherStageMask, m);
}
m.setAll(srcRect.width(), 0, srcRect.fLeft,
0, srcRect.height(), srcRect.fTop,
0, 0, GrMatrix::I()[8]);
if (NULL != srcMatrix) {
m.postConcat(*srcMatrix);
}
drawState->sampler(GrPaint::kFirstTextureStage)->preConcatMatrix(m);
const GrVertexBuffer* sqVB = fGpu->getUnitSquareVertexBuffer();
if (NULL == sqVB) {
GrPrintf("Failed to create static rect vb.\n");
return;
}
target->setVertexSourceToBuffer(layout, sqVB);
target->drawNonIndexed(kTriangleFan_PrimitiveType, 0, 4);
#else
GrDrawTarget* target;
#if BATCH_RECT_TO_RECT
target = this->prepareToDraw(paint, kBuffered_DrawCategory);
#else
target = this->prepareToDraw(paint, kUnbuffered_DrawCategory);
#endif
const GrRect* srcRects[GrDrawState::kNumStages] = {NULL};
const GrMatrix* srcMatrices[GrDrawState::kNumStages] = {NULL};
srcRects[0] = &srcRect;
srcMatrices[0] = srcMatrix;
target->drawRect(dstRect, dstMatrix, 1, srcRects, srcMatrices);
#endif
}
void GrContext::drawVertices(const GrPaint& paint,
GrPrimitiveType primitiveType,
int vertexCount,
const GrPoint positions[],
const GrPoint texCoords[],
const GrColor colors[],
const uint16_t indices[],
int indexCount) {
SK_TRACE_EVENT0("GrContext::drawVertices");
GrDrawTarget::AutoReleaseGeometry geo;
GrDrawTarget* target = this->prepareToDraw(paint, kUnbuffered_DrawCategory);
bool hasTexCoords[GrPaint::kTotalStages] = {
NULL != texCoords, // texCoordSrc provides explicit stage 0 coords
0 // remaining stages use positions
};
GrVertexLayout layout = PaintStageVertexLayoutBits(paint, hasTexCoords);
if (NULL != colors) {
layout |= GrDrawTarget::kColor_VertexLayoutBit;
}
int vertexSize = GrDrawTarget::VertexSize(layout);
if (sizeof(GrPoint) != vertexSize) {
if (!geo.set(target, layout, vertexCount, 0)) {
GrPrintf("Failed to get space for vertices!\n");
return;
}
int texOffsets[GrDrawState::kMaxTexCoords];
int colorOffset;
GrDrawTarget::VertexSizeAndOffsetsByIdx(layout,
texOffsets,
&colorOffset,
NULL,
NULL);
void* curVertex = geo.vertices();
for (int i = 0; i < vertexCount; ++i) {
*((GrPoint*)curVertex) = positions[i];
if (texOffsets[0] > 0) {
*(GrPoint*)((intptr_t)curVertex + texOffsets[0]) = texCoords[i];
}
if (colorOffset > 0) {
*(GrColor*)((intptr_t)curVertex + colorOffset) = colors[i];
}
curVertex = (void*)((intptr_t)curVertex + vertexSize);
}
} else {
target->setVertexSourceToArray(layout, positions, vertexCount);
}
// we don't currently apply offscreen AA to this path. Need improved
// management of GrDrawTarget's geometry to avoid copying points per-tile.
if (NULL != indices) {
target->setIndexSourceToArray(indices, indexCount);
target->drawIndexed(primitiveType, 0, 0, vertexCount, indexCount);
} else {
target->drawNonIndexed(primitiveType, 0, vertexCount);
}
}
///////////////////////////////////////////////////////////////////////////////
namespace {
struct CircleVertex {
GrPoint fPos;
GrPoint fCenter;
GrScalar fOuterRadius;
GrScalar fInnerRadius;
};
/* Returns true if will map a circle to another circle. This can be true
* if the matrix only includes square-scale, rotation, translation.
*/
inline bool isSimilarityTransformation(const SkMatrix& matrix,
SkScalar tol = SK_ScalarNearlyZero) {
if (matrix.isIdentity() || matrix.getType() == SkMatrix::kTranslate_Mask) {
return true;
}
if (matrix.hasPerspective()) {
return false;
}
SkScalar mx = matrix.get(SkMatrix::kMScaleX);
SkScalar sx = matrix.get(SkMatrix::kMSkewX);
SkScalar my = matrix.get(SkMatrix::kMScaleY);
SkScalar sy = matrix.get(SkMatrix::kMSkewY);
if (mx == 0 && sx == 0 && my == 0 && sy == 0) {
return false;
}
// it has scales or skews, but it could also be rotation, check it out.
SkVector vec[2];
vec[0].set(mx, sx);
vec[1].set(sy, my);
return SkScalarNearlyZero(vec[0].dot(vec[1]), SkScalarSquare(tol)) &&
SkScalarNearlyEqual(vec[0].lengthSqd(), vec[1].lengthSqd(),
SkScalarSquare(tol));
}
}
// TODO: strokeWidth can't be larger than zero right now.
// It will be fixed when drawPath() can handle strokes.
void GrContext::drawOval(const GrPaint& paint,
const GrRect& rect,
SkScalar strokeWidth) {
DrawCategory category = (DEFER_PATHS) ? kBuffered_DrawCategory :
kUnbuffered_DrawCategory;
GrDrawTarget* target = this->prepareToDraw(paint, category);
GrDrawState* drawState = target->drawState();
GrMatrix vm = drawState->getViewMatrix();
if (!isSimilarityTransformation(vm) ||
!paint.fAntiAlias ||
rect.height() != rect.width()) {
SkPath path;
path.addOval(rect);
GrPathFill fill = (strokeWidth == 0) ?
kHairLine_PathFill : kWinding_PathFill;
this->internalDrawPath(paint, path, fill, NULL);
return;
}
const GrRenderTarget* rt = drawState->getRenderTarget();
if (NULL == rt) {
return;
}
GrDrawTarget::AutoDeviceCoordDraw adcd(target, paint.getActiveStageMask());
GrVertexLayout layout = PaintStageVertexLayoutBits(paint, NULL);
layout |= GrDrawTarget::kEdge_VertexLayoutBit;
GrAssert(sizeof(CircleVertex) == GrDrawTarget::VertexSize(layout));
GrPoint center = GrPoint::Make(rect.centerX(), rect.centerY());
GrScalar radius = SkScalarHalf(rect.width());
vm.mapPoints(&center, 1);
radius = vm.mapRadius(radius);
GrScalar outerRadius = radius;
GrScalar innerRadius = 0;
SkScalar halfWidth = 0;
if (strokeWidth == 0) {
halfWidth = SkScalarHalf(SK_Scalar1);
outerRadius += halfWidth;
innerRadius = SkMaxScalar(0, radius - halfWidth);
}
GrDrawTarget::AutoReleaseGeometry geo(target, layout, 4, 0);
if (!geo.succeeded()) {
GrPrintf("Failed to get space for vertices!\n");
return;
}
CircleVertex* verts = reinterpret_cast<CircleVertex*>(geo.vertices());
SkScalar L = center.fX - outerRadius;
SkScalar R = center.fX + outerRadius;
SkScalar T = center.fY - outerRadius;
SkScalar B = center.fY + outerRadius;
verts[0].fPos = SkPoint::Make(L, T);
verts[1].fPos = SkPoint::Make(R, T);
verts[2].fPos = SkPoint::Make(L, B);
verts[3].fPos = SkPoint::Make(R, B);
for (int i = 0; i < 4; ++i) {
// this goes to fragment shader, it should be in y-points-up space.
verts[i].fCenter = SkPoint::Make(center.fX, rt->height() - center.fY);
verts[i].fOuterRadius = outerRadius;
verts[i].fInnerRadius = innerRadius;
}
drawState->setVertexEdgeType(GrDrawState::kCircle_EdgeType);
target->drawNonIndexed(kTriangleStrip_PrimitiveType, 0, 4);
}
void GrContext::drawPath(const GrPaint& paint, const SkPath& path,
GrPathFill fill, const GrPoint* translate) {
if (path.isEmpty()) {
if (GrIsFillInverted(fill)) {
this->drawPaint(paint);
}
return;
}
SkRect ovalRect;
if (!GrIsFillInverted(fill) && path.isOval(&ovalRect)) {
if (translate) {
ovalRect.offset(*translate);
}
SkScalar width = (fill == kHairLine_PathFill) ? 0 : -SK_Scalar1;
this->drawOval(paint, ovalRect, width);
return;
}
internalDrawPath(paint, path, fill, translate);
}
void GrContext::internalDrawPath(const GrPaint& paint, const SkPath& path,
GrPathFill fill, const GrPoint* translate) {
// Note that below we 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.
DrawCategory category = (DEFER_PATHS) ? kBuffered_DrawCategory :
kUnbuffered_DrawCategory;
GrDrawTarget* target = this->prepareToDraw(paint, category);
GrDrawState::StageMask stageMask = paint.getActiveStageMask();
bool prAA = paint.fAntiAlias && !this->getRenderTarget()->isMultisampled();
// 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.
if (disable_coverage_aa_for_blend(target)) {
#if GR_DEBUG
//GrPrintf("Turning off AA to correctly apply blend.\n");
#endif
prAA = false;
}
GrPathRenderer* pr = this->getPathRenderer(path, fill, target, prAA);
if (NULL == pr) {
#if GR_DEBUG
GrPrintf("Unable to find path renderer compatible with path.\n");
#endif
return;
}
pr->drawPath(path, fill, translate, target, stageMask, prAA);
}
////////////////////////////////////////////////////////////////////////////////
void GrContext::flush(int flagsBitfield) {
if (kDiscard_FlushBit & flagsBitfield) {
fDrawBuffer->reset();
} else {
this->flushDrawBuffer();
}
if (kForceCurrentRenderTarget_FlushBit & flagsBitfield) {
fGpu->forceRenderTargetFlush();
}
}
void GrContext::flushDrawBuffer() {
if (fDrawBuffer) {
// With addition of the AA clip path, flushing the draw buffer can
// result in the generation of an AA clip mask. During this
// process the SW path renderer may be invoked which recusively
// calls this method (via internalWriteTexturePixels) creating
// infinite recursion
GrInOrderDrawBuffer* temp = fDrawBuffer;
fDrawBuffer = NULL;
temp->flushTo(fGpu);
fDrawBuffer = temp;
}
}
void GrContext::internalWriteTexturePixels(GrTexture* texture,
int left, int top,
int width, int height,
GrPixelConfig config,
const void* buffer,
size_t rowBytes,
uint32_t flags) {
SK_TRACE_EVENT0("GrContext::writeTexturePixels");
ASSERT_OWNED_RESOURCE(texture);
if (!(kDontFlush_PixelOpsFlag & flags)) {
this->flush();
}
// TODO: use scratch texture to perform conversion
if (GrPixelConfigIsUnpremultiplied(texture->config()) !=
GrPixelConfigIsUnpremultiplied(config)) {
return;
}
fGpu->writeTexturePixels(texture, left, top, width, height,
config, buffer, rowBytes);
}
bool GrContext::internalReadTexturePixels(GrTexture* texture,
int left, int top,
int width, int height,
GrPixelConfig config,
void* buffer,
size_t rowBytes,
uint32_t flags) {
SK_TRACE_EVENT0("GrContext::readTexturePixels");
ASSERT_OWNED_RESOURCE(texture);
// TODO: code read pixels for textures that aren't also rendertargets
GrRenderTarget* target = texture->asRenderTarget();
if (NULL != target) {
return this->internalReadRenderTargetPixels(target,
left, top, width, height,
config, buffer, rowBytes,
flags);
} else {
return false;
}
}
#include "SkConfig8888.h"
namespace {
/**
* Converts a GrPixelConfig to a SkCanvas::Config8888. Only byte-per-channel
* formats are representable as Config8888 and so the function returns false
* if the GrPixelConfig has no equivalent Config8888.
*/
bool grconfig_to_config8888(GrPixelConfig config,
SkCanvas::Config8888* config8888) {
switch (config) {
case kRGBA_8888_PM_GrPixelConfig:
*config8888 = SkCanvas::kRGBA_Premul_Config8888;
return true;
case kRGBA_8888_UPM_GrPixelConfig:
*config8888 = SkCanvas::kRGBA_Unpremul_Config8888;
return true;
case kBGRA_8888_PM_GrPixelConfig:
*config8888 = SkCanvas::kBGRA_Premul_Config8888;
return true;
case kBGRA_8888_UPM_GrPixelConfig:
*config8888 = SkCanvas::kBGRA_Unpremul_Config8888;
return true;
default:
return false;
}
}
}
bool GrContext::internalReadRenderTargetPixels(GrRenderTarget* target,
int left, int top,
int width, int height,
GrPixelConfig config,
void* buffer,
size_t rowBytes,
uint32_t flags) {
SK_TRACE_EVENT0("GrContext::readRenderTargetPixels");
ASSERT_OWNED_RESOURCE(target);
if (NULL == target) {
target = fDrawState->getRenderTarget();
if (NULL == target) {
return false;
}
}
if (!(kDontFlush_PixelOpsFlag & flags)) {
this->flush();
}
if (!GrPixelConfigIsUnpremultiplied(target->config()) &&
GrPixelConfigIsUnpremultiplied(config) &&
!fGpu->canPreserveReadWriteUnpremulPixels()) {
SkCanvas::Config8888 srcConfig8888, dstConfig8888;
if (!grconfig_to_config8888(target->config(), &srcConfig8888) ||
!grconfig_to_config8888(config, &dstConfig8888)) {
return false;
}
// do read back using target's own config
this->internalReadRenderTargetPixels(target,
left, top,
width, height,
target->config(),
buffer, rowBytes,
kDontFlush_PixelOpsFlag);
// sw convert the pixels to unpremul config
uint32_t* pixels = reinterpret_cast<uint32_t*>(buffer);
SkConvertConfig8888Pixels(pixels, rowBytes, dstConfig8888,
pixels, rowBytes, srcConfig8888,
width, height);
return true;
}
GrTexture* src = target->asTexture();
bool swapRAndB = NULL != src &&
fGpu->preferredReadPixelsConfig(config) ==
GrPixelConfigSwapRAndB(config);
bool flipY = NULL != src &&
fGpu->readPixelsWillPayForYFlip(target, left, top,
width, height, config,
rowBytes);
bool alphaConversion = (!GrPixelConfigIsUnpremultiplied(target->config()) &&
GrPixelConfigIsUnpremultiplied(config));
if (NULL == src && alphaConversion) {
// we should fallback to cpu conversion here. This could happen when
// we were given an external render target by the client that is not
// also a texture (e.g. FBO 0 in GL)
return false;
}
// we draw to a scratch texture if any of these conversion are applied
GrAutoScratchTexture ast;
if (flipY || swapRAndB || alphaConversion) {
GrAssert(NULL != src);
if (swapRAndB) {
config = GrPixelConfigSwapRAndB(config);
GrAssert(kUnknown_GrPixelConfig != config);
}
// Make the scratch a render target because we don't have a robust
// readTexturePixels as of yet (it calls this function).
const GrTextureDesc desc = {
kRenderTarget_GrTextureFlagBit,
width, height,
config,
0 // samples
};
// When a full readback 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;
}
ast.set(this, desc, match);
GrTexture* texture = ast.texture();
if (!texture) {
return false;
}
target = texture->asRenderTarget();
GrAssert(NULL != target);
GrDrawTarget::AutoStateRestore asr(fGpu,
GrDrawTarget::kReset_ASRInit);
GrDrawState* drawState = fGpu->drawState();
drawState->setRenderTarget(target);
GrMatrix matrix;
if (flipY) {
matrix.setTranslate(SK_Scalar1 * left,
SK_Scalar1 * (top + height));
matrix.set(GrMatrix::kMScaleY, -GR_Scalar1);
} else {
matrix.setTranslate(SK_Scalar1 *left, SK_Scalar1 *top);
}
matrix.postIDiv(src->width(), src->height());
drawState->sampler(0)->reset(matrix);
drawState->sampler(0)->setRAndBSwap(swapRAndB);
drawState->setTexture(0, src);
GrRect rect;
rect.setXYWH(0, 0, SK_Scalar1 * width, SK_Scalar1 * height);
fGpu->drawSimpleRect(rect, NULL, 0x1);
left = 0;
top = 0;
}
return fGpu->readPixels(target,
left, top, width, height,
config, buffer, rowBytes, flipY);
}
void GrContext::resolveRenderTarget(GrRenderTarget* target) {
GrAssert(target);
ASSERT_OWNED_RESOURCE(target);
// In the future we may track whether there are any pending draws to this
// target. We don't today so we always perform a flush. We don't promise
// this to our clients, though.
this->flush();
fGpu->resolveRenderTarget(target);
}
void GrContext::copyTexture(GrTexture* src, GrRenderTarget* dst) {
if (NULL == src || NULL == dst) {
return;
}
ASSERT_OWNED_RESOURCE(src);
// Writes pending to the source texture are not tracked, so a flush
// is required to ensure that the copy captures the most recent contents
// of the source texture. See similar behaviour in
// GrContext::resolveRenderTarget.
this->flush();
GrDrawTarget::AutoStateRestore asr(fGpu, GrDrawTarget::kReset_ASRInit);
GrDrawState* drawState = fGpu->drawState();
drawState->setRenderTarget(dst);
GrMatrix sampleM;
sampleM.setIDiv(src->width(), src->height());
drawState->setTexture(0, src);
drawState->sampler(0)->reset(sampleM);
SkRect rect = SkRect::MakeXYWH(0, 0,
SK_Scalar1 * src->width(),
SK_Scalar1 * src->height());
fGpu->drawSimpleRect(rect, NULL, 1 << 0);
}
void GrContext::internalWriteRenderTargetPixels(GrRenderTarget* target,
int left, int top,
int width, int height,
GrPixelConfig config,
const void* buffer,
size_t rowBytes,
uint32_t flags) {
SK_TRACE_EVENT0("GrContext::writeRenderTargetPixels");
ASSERT_OWNED_RESOURCE(target);
if (NULL == target) {
target = fDrawState->getRenderTarget();
if (NULL == target) {
return;
}
}
// TODO: when underlying api has a direct way to do this we should use it
// (e.g. glDrawPixels on desktop GL).
// If the RT is also a texture and we don't have to do PM/UPM conversion
// then take the texture path, which we expect to be at least as fast or
// faster since it doesn't use an intermediate texture as we do below.
#if !GR_MAC_BUILD
// At least some drivers on the Mac get confused when glTexImage2D is called
// on a texture attached to an FBO. The FBO still sees the old image. TODO:
// determine what OS versions and/or HW is affected.
if (NULL != target->asTexture() &&
GrPixelConfigIsUnpremultiplied(target->config()) ==
GrPixelConfigIsUnpremultiplied(config)) {
this->internalWriteTexturePixels(target->asTexture(),
left, top, width, height,
config, buffer, rowBytes, flags);
return;
}
#endif
if (!GrPixelConfigIsUnpremultiplied(target->config()) &&
GrPixelConfigIsUnpremultiplied(config) &&
!fGpu->canPreserveReadWriteUnpremulPixels()) {
SkCanvas::Config8888 srcConfig8888, dstConfig8888;
if (!grconfig_to_config8888(config, &srcConfig8888) ||
!grconfig_to_config8888(target->config(), &dstConfig8888)) {
return;
}
// allocate a tmp buffer and sw convert the pixels to premul
SkAutoSTMalloc<128 * 128, uint32_t> tmpPixels(width * height);
const uint32_t* src = reinterpret_cast<const uint32_t*>(buffer);
SkConvertConfig8888Pixels(tmpPixels.get(), 4 * width, dstConfig8888,
src, rowBytes, srcConfig8888,
width, height);
// upload the already premul pixels
this->internalWriteRenderTargetPixels(target,
left, top,
width, height,
target->config(),
tmpPixels, 4 * width, flags);
return;
}
bool swapRAndB = fGpu->preferredReadPixelsConfig(config) ==
GrPixelConfigSwapRAndB(config);
if (swapRAndB) {
config = GrPixelConfigSwapRAndB(config);
}
const GrTextureDesc desc = {
kNone_GrTextureFlags, width, height, config, 0
};
GrAutoScratchTexture ast(this, desc);
GrTexture* texture = ast.texture();
if (NULL == texture) {
return;
}
this->internalWriteTexturePixels(texture, 0, 0, width, height,
config, buffer, rowBytes, flags);
GrDrawTarget::AutoStateRestore asr(fGpu, GrDrawTarget::kReset_ASRInit);
GrDrawState* drawState = fGpu->drawState();
GrMatrix matrix;
matrix.setTranslate(GrIntToScalar(left), GrIntToScalar(top));
drawState->setViewMatrix(matrix);
drawState->setRenderTarget(target);
drawState->setTexture(0, texture);
matrix.setIDiv(texture->width(), texture->height());
drawState->sampler(0)->reset(GrSamplerState::kClamp_WrapMode,
GrSamplerState::kNearest_Filter,
matrix);
drawState->sampler(0)->setRAndBSwap(swapRAndB);
GrVertexLayout layout = GrDrawTarget::StagePosAsTexCoordVertexLayoutBit(0);
static const int VCOUNT = 4;
// TODO: Use GrGpu::drawRect here
GrDrawTarget::AutoReleaseGeometry geo(fGpu, layout, VCOUNT, 0);
if (!geo.succeeded()) {
GrPrintf("Failed to get space for vertices!\n");
return;
}
((GrPoint*)geo.vertices())->setIRectFan(0, 0, width, height);
fGpu->drawNonIndexed(kTriangleFan_PrimitiveType, 0, VCOUNT);
}
////////////////////////////////////////////////////////////////////////////////
void GrContext::setPaint(const GrPaint& paint) {
for (int i = 0; i < GrPaint::kMaxTextures; ++i) {
int s = i + GrPaint::kFirstTextureStage;
fDrawState->setTexture(s, paint.getTexture(i));
ASSERT_OWNED_RESOURCE(paint.getTexture(i));
if (paint.getTexture(i)) {
*fDrawState->sampler(s) = paint.getTextureSampler(i);
}
}
fDrawState->setFirstCoverageStage(GrPaint::kFirstMaskStage);
for (int i = 0; i < GrPaint::kMaxMasks; ++i) {
int s = i + GrPaint::kFirstMaskStage;
fDrawState->setTexture(s, paint.getMask(i));
ASSERT_OWNED_RESOURCE(paint.getMask(i));
if (paint.getMask(i)) {
*fDrawState->sampler(s) = paint.getMaskSampler(i);
}
}
// disable all stages not accessible via the paint
for (int s = GrPaint::kTotalStages; s < GrDrawState::kNumStages; ++s) {
fDrawState->setTexture(s, NULL);
}
fDrawState->setColor(paint.fColor);
if (paint.fDither) {
fDrawState->enableState(GrDrawState::kDither_StateBit);
} else {
fDrawState->disableState(GrDrawState::kDither_StateBit);
}
if (paint.fAntiAlias) {
fDrawState->enableState(GrDrawState::kHWAntialias_StateBit);
} else {
fDrawState->disableState(GrDrawState::kHWAntialias_StateBit);
}
if (paint.fColorMatrixEnabled) {
fDrawState->enableState(GrDrawState::kColorMatrix_StateBit);
fDrawState->setColorMatrix(paint.fColorMatrix);
} else {
fDrawState->disableState(GrDrawState::kColorMatrix_StateBit);
}
fDrawState->setBlendFunc(paint.fSrcBlendCoeff, paint.fDstBlendCoeff);
fDrawState->setColorFilter(paint.fColorFilterColor, paint.fColorFilterXfermode);
fDrawState->setCoverage(paint.fCoverage);
#if GR_DEBUG
if ((paint.getActiveMaskStageMask() || 0xff != paint.fCoverage) &&
!fGpu->canApplyCoverage()) {
GrPrintf("Partial pixel coverage will be incorrectly blended.\n");
}
#endif
}
GrDrawTarget* GrContext::prepareToDraw(const GrPaint& paint,
DrawCategory category) {
if (category != fLastDrawCategory) {
this->flushDrawBuffer();
fLastDrawCategory = category;
}
this->setPaint(paint);
GrDrawTarget* target = fGpu;
switch (category) {
case kUnbuffered_DrawCategory:
target = fGpu;
break;
case kBuffered_DrawCategory:
target = fDrawBuffer;
fDrawBuffer->setClip(fGpu->getClip());
break;
default:
GrCrash("Unexpected DrawCategory.");
break;
}
return target;
}
GrPathRenderer* GrContext::getPathRenderer(const SkPath& path,
GrPathFill fill,
const GrDrawTarget* target,
bool antiAlias) {
if (NULL == fPathRendererChain) {
fPathRendererChain =
new GrPathRendererChain(this, GrPathRendererChain::kNone_UsageFlag);
}
return fPathRendererChain->getPathRenderer(path, fill, target, antiAlias);
}
////////////////////////////////////////////////////////////////////////////////
void GrContext::setRenderTarget(GrRenderTarget* target) {
ASSERT_OWNED_RESOURCE(target);
if (fDrawState->getRenderTarget() != target) {
this->flush(false);
fDrawState->setRenderTarget(target);
}
}
GrRenderTarget* GrContext::getRenderTarget() {
return fDrawState->getRenderTarget();
}
const GrRenderTarget* GrContext::getRenderTarget() const {
return fDrawState->getRenderTarget();
}
bool GrContext::isConfigRenderable(GrPixelConfig config) const {
return fGpu->isConfigRenderable(config);
}
const GrMatrix& GrContext::getMatrix() const {
return fDrawState->getViewMatrix();
}
void GrContext::setMatrix(const GrMatrix& m) {
fDrawState->setViewMatrix(m);
}
void GrContext::concatMatrix(const GrMatrix& m) const {
fDrawState->preConcatViewMatrix(m);
}
static inline intptr_t setOrClear(intptr_t bits, int shift, intptr_t pred) {
intptr_t mask = 1 << shift;
if (pred) {
bits |= mask;
} else {
bits &= ~mask;
}
return bits;
}
void GrContext::resetStats() {
fGpu->resetStats();
}
const GrGpuStats& GrContext::getStats() const {
return fGpu->getStats();
}
void GrContext::printStats() const {
fGpu->printStats();
}
GrContext::GrContext(GrGpu* gpu) {
fGpu = gpu;
fGpu->ref();
fGpu->setContext(this);
fDrawState = new GrDrawState();
fGpu->setDrawState(fDrawState);
fPathRendererChain = NULL;
fTextureCache = new GrResourceCache(MAX_TEXTURE_CACHE_COUNT,
MAX_TEXTURE_CACHE_BYTES);
fFontCache = new GrFontCache(fGpu);
fLastDrawCategory = kUnbuffered_DrawCategory;
fDrawBuffer = NULL;
fDrawBufferVBAllocPool = NULL;
fDrawBufferIBAllocPool = NULL;
fAAFillRectIndexBuffer = NULL;
fAAStrokeRectIndexBuffer = NULL;
this->setupDrawBuffer();
}
void GrContext::setupDrawBuffer() {
GrAssert(NULL == fDrawBuffer);
GrAssert(NULL == fDrawBufferVBAllocPool);
GrAssert(NULL == fDrawBufferIBAllocPool);
#if DEFER_TEXT_RENDERING || BATCH_RECT_TO_RECT || DEFER_PATHS
fDrawBufferVBAllocPool =
new GrVertexBufferAllocPool(fGpu, false,
DRAW_BUFFER_VBPOOL_BUFFER_SIZE,
DRAW_BUFFER_VBPOOL_PREALLOC_BUFFERS);
fDrawBufferIBAllocPool =
new GrIndexBufferAllocPool(fGpu, false,
DRAW_BUFFER_IBPOOL_BUFFER_SIZE,
DRAW_BUFFER_IBPOOL_PREALLOC_BUFFERS);
fDrawBuffer = new GrInOrderDrawBuffer(fGpu,
fDrawBufferVBAllocPool,
fDrawBufferIBAllocPool);
#endif
#if BATCH_RECT_TO_RECT
fDrawBuffer->setQuadIndexBuffer(this->getQuadIndexBuffer());
#endif
fDrawBuffer->setAutoFlushTarget(fGpu);
fDrawBuffer->setDrawState(fDrawState);
}
GrDrawTarget* GrContext::getTextTarget(const GrPaint& paint) {
#if DEFER_TEXT_RENDERING
return prepareToDraw(paint, kBuffered_DrawCategory);
#else
return prepareToDraw(paint, kUnbuffered_DrawCategory);
#endif
}
const GrIndexBuffer* GrContext::getQuadIndexBuffer() const {
return fGpu->getQuadIndexBuffer();
}
GrTexture* GrContext::gaussianBlur(GrTexture* srcTexture,
GrAutoScratchTexture* temp1,
GrAutoScratchTexture* temp2,
const SkRect& rect,
float sigmaX, float sigmaY) {
ASSERT_OWNED_RESOURCE(srcTexture);
GrRenderTarget* oldRenderTarget = this->getRenderTarget();
GrClip oldClip = this->getClip();
GrTexture* origTexture = srcTexture;
GrAutoMatrix avm(this, GrMatrix::I());
SkIRect clearRect;
int scaleFactorX, halfWidthX, kernelWidthX;
int scaleFactorY, halfWidthY, kernelWidthY;
sigmaX = adjust_sigma(sigmaX, &scaleFactorX, &halfWidthX, &kernelWidthX);
sigmaY = adjust_sigma(sigmaY, &scaleFactorY, &halfWidthY, &kernelWidthY);
SkRect srcRect(rect);
scale_rect(&srcRect, 1.0f / scaleFactorX, 1.0f / scaleFactorY);
srcRect.roundOut();
scale_rect(&srcRect, static_cast<float>(scaleFactorX),
static_cast<float>(scaleFactorY));
this->setClip(srcRect);
GrAssert(kBGRA_8888_PM_GrPixelConfig == srcTexture->config() ||
kRGBA_8888_PM_GrPixelConfig == srcTexture->config() ||
kAlpha_8_GrPixelConfig == srcTexture->config());
const GrTextureDesc desc = {
kRenderTarget_GrTextureFlagBit | kNoStencil_GrTextureFlagBit,
SkScalarFloorToInt(srcRect.width()),
SkScalarFloorToInt(srcRect.height()),
srcTexture->config(),
0 // samples
};
temp1->set(this, desc);
if (temp2) {
temp2->set(this, desc);
}
GrTexture* dstTexture = temp1->texture();
GrPaint paint;
paint.reset();
paint.textureSampler(0)->setFilter(GrSamplerState::kBilinear_Filter);
for (int i = 1; i < scaleFactorX || i < scaleFactorY; i *= 2) {
paint.textureSampler(0)->matrix()->setIDiv(srcTexture->width(),
srcTexture->height());
this->setRenderTarget(dstTexture->asRenderTarget());
SkRect dstRect(srcRect);
scale_rect(&dstRect, i < scaleFactorX ? 0.5f : 1.0f,
i < scaleFactorY ? 0.5f : 1.0f);
paint.setTexture(0, srcTexture);
this->drawRectToRect(paint, dstRect, srcRect);
srcRect = dstRect;
SkTSwap(srcTexture, dstTexture);
// If temp2 is non-NULL, don't render back to origTexture
if (temp2 && dstTexture == origTexture) dstTexture = temp2->texture();
}
SkIRect srcIRect;
srcRect.roundOut(&srcIRect);
if (sigmaX > 0.0f) {
SkAutoTMalloc<float> kernelStorageX(kernelWidthX);
float* kernelX = kernelStorageX.get();
build_kernel(sigmaX, kernelX, kernelWidthX);
if (scaleFactorX > 1) {
// Clear out a halfWidth to the right of the srcRect to prevent the
// X convolution from reading garbage.
clearRect = SkIRect::MakeXYWH(srcIRect.fRight, srcIRect.fTop,
halfWidthX, srcIRect.height());
this->clear(&clearRect, 0x0);
}
this->setRenderTarget(dstTexture->asRenderTarget());
convolve(fGpu, srcTexture, srcRect, kernelX, kernelWidthX,
GrSamplerState::kX_FilterDirection);
SkTSwap(srcTexture, dstTexture);
if (temp2 && dstTexture == origTexture) {
dstTexture = temp2->texture();
}
}
if (sigmaY > 0.0f) {
SkAutoTMalloc<float> kernelStorageY(kernelWidthY);
float* kernelY = kernelStorageY.get();
build_kernel(sigmaY, kernelY, kernelWidthY);
if (scaleFactorY > 1 || sigmaX > 0.0f) {
// Clear out a halfWidth below the srcRect to prevent the Y
// convolution from reading garbage.
clearRect = SkIRect::MakeXYWH(srcIRect.fLeft, srcIRect.fBottom,
srcIRect.width(), halfWidthY);
this->clear(&clearRect, 0x0);
}
this->setRenderTarget(dstTexture->asRenderTarget());
convolve(fGpu, srcTexture, srcRect, kernelY, kernelWidthY,
GrSamplerState::kY_FilterDirection);
SkTSwap(srcTexture, dstTexture);
if (temp2 && dstTexture == origTexture) {
dstTexture = temp2->texture();
}
}
if (scaleFactorX > 1 || scaleFactorY > 1) {
// Clear one pixel to the right and below, to accommodate bilinear
// upsampling.
clearRect = SkIRect::MakeXYWH(srcIRect.fLeft, srcIRect.fBottom,
srcIRect.width() + 1, 1);
this->clear(&clearRect, 0x0);
clearRect = SkIRect::MakeXYWH(srcIRect.fRight, srcIRect.fTop,
1, srcIRect.height());
this->clear(&clearRect, 0x0);
// FIXME: This should be mitchell, not bilinear.
paint.textureSampler(0)->setFilter(GrSamplerState::kBilinear_Filter);
paint.textureSampler(0)->matrix()->setIDiv(srcTexture->width(),
srcTexture->height());
this->setRenderTarget(dstTexture->asRenderTarget());
paint.setTexture(0, srcTexture);
SkRect dstRect(srcRect);
scale_rect(&dstRect, (float) scaleFactorX, (float) scaleFactorY);
this->drawRectToRect(paint, dstRect, srcRect);
srcRect = dstRect;
SkTSwap(srcTexture, dstTexture);
}
this->setRenderTarget(oldRenderTarget);
this->setClip(oldClip);
return srcTexture;
}
GrTexture* GrContext::applyMorphology(GrTexture* srcTexture,
const GrRect& rect,
GrTexture* temp1, GrTexture* temp2,
GrSamplerState::Filter filter,
SkISize radius) {
ASSERT_OWNED_RESOURCE(srcTexture);
GrRenderTarget* oldRenderTarget = this->getRenderTarget();
GrAutoMatrix avm(this, GrMatrix::I());
GrClip oldClip = this->getClip();
this->setClip(GrRect::MakeWH(SkIntToScalar(srcTexture->width()),
SkIntToScalar(srcTexture->height())));
if (radius.fWidth > 0) {
this->setRenderTarget(temp1->asRenderTarget());
apply_morphology(fGpu, srcTexture, rect, radius.fWidth, filter,
GrSamplerState::kX_FilterDirection);
SkIRect clearRect = SkIRect::MakeXYWH(
SkScalarFloorToInt(rect.fLeft),
SkScalarFloorToInt(rect.fBottom),
SkScalarFloorToInt(rect.width()),
radius.fHeight);
this->clear(&clearRect, 0x0);
srcTexture = temp1;
}
if (radius.fHeight > 0) {
this->setRenderTarget(temp2->asRenderTarget());
apply_morphology(fGpu, srcTexture, rect, radius.fHeight, filter,
GrSamplerState::kY_FilterDirection);
srcTexture = temp2;
}
this->setRenderTarget(oldRenderTarget);
this->setClip(oldClip);
return srcTexture;
}
///////////////////////////////////////////////////////////////////////////////