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skia2/gm/lazytiling.cpp
Brian Salomon 2c673409ef Expose writing to mip levels via GrSurfaceContext::writePixels 
Bug: skia:11786
Change-Id: Id17952db0aede56fa39845d9d371cf0a141f9dd7
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/391836
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
2021-04-02 19:16:15 +00:00

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/*
* Copyright 2021 Google LLC
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm/gm.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkPaint.h"
#include "include/core/SkRect.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/gpu/GrDirectContext.h"
#include "src/core/SkConvertPixels.h"
#include "src/gpu/GrDirectContextPriv.h"
#include "src/gpu/GrPaint.h"
#include "src/gpu/GrProxyProvider.h"
#include "src/gpu/GrResourceProvider.h"
#include "src/gpu/GrSurfaceDrawContext.h"
#include "src/gpu/SkGr.h"
#include "src/gpu/effects/GrTextureEffect.h"
#include "tools/gpu/ProxyUtils.h"
static GrSurfaceProxyView create_view(GrDirectContext* dContext,
const SkBitmap& src,
GrSurfaceOrigin origin) {
SkASSERT(src.colorType() == kRGBA_8888_SkColorType);
#define USE_LAZY_PROXIES 1 // Toggle this to generate the reference images
if (USE_LAZY_PROXIES) {
auto format = dContext->priv().caps()->getDefaultBackendFormat(GrColorType::kRGBA_8888,
GrRenderable::kNo);
if (!format.isValid()) {
return {};
}
sk_sp<GrTextureProxy> proxy = GrProxyProvider::MakeFullyLazyProxy(
[src](GrResourceProvider* rp,
const GrSurfaceProxy::LazySurfaceDesc& desc)
-> GrSurfaceProxy::LazyCallbackResult {
SkASSERT(desc.fMipmapped == GrMipmapped::kNo);
GrMipLevel mipLevel = {src.getPixels(), src.rowBytes(), nullptr};
auto colorType = SkColorTypeToGrColorType(src.colorType());
return rp->createTexture(src.dimensions(), desc.fFormat, colorType,
desc.fRenderable, desc.fSampleCnt, desc.fBudgeted,
desc.fFit, desc.fProtected, mipLevel);
},
format, GrRenderable::kNo, 1, GrProtected::kNo, *dContext->priv().caps(),
GrSurfaceProxy::UseAllocator::kYes);
if (!proxy) {
return {};
}
auto swizzle = dContext->priv().caps()->getReadSwizzle(proxy->backendFormat(),
GrColorType::kRGBA_8888);
return GrSurfaceProxyView(std::move(proxy), origin, swizzle);
}
return sk_gpu_test::MakeTextureProxyViewFromData(dContext,
GrRenderable::kNo,
origin,
src.pixmap());
}
// Create an over large texture which is initialized to opaque black outside of the content
// rect. The inside of the content rect consists of a grey coordinate frame lacking the -Y axis.
// The -X and +X axes have a red and green dot at their ends (respectively). Finally, the content
// rect has a 1-pixel wide blue border.
static SkBitmap create_bitmap(SkIRect contentRect, SkISize fullSize, GrSurfaceOrigin origin) {
const int kContentSize = contentRect.width();
SkBitmap contentBM;
{
SkImageInfo contentInfo = SkImageInfo::Make(kContentSize, kContentSize,
kRGBA_8888_SkColorType, kOpaque_SkAlphaType);
contentBM.allocPixels(contentInfo);
contentBM.eraseColor(SK_ColorWHITE);
const int halfM1 = kContentSize/2 - 1;
// The coordinate frame
contentBM.eraseArea(SkIRect::MakeXYWH(halfM1, 2,2, halfM1), SK_ColorGRAY);
contentBM.eraseArea(SkIRect::MakeXYWH(2, halfM1, kContentSize-4, 2), SK_ColorGRAY);
contentBM.eraseArea(SkIRect::MakeXYWH(2, halfM1, 2, 2), SK_ColorRED);
contentBM.eraseArea(SkIRect::MakeXYWH(kContentSize-4, halfM1, 2, 2), SK_ColorGREEN);
// The 1-pixel wide rim around the content rect
contentBM.eraseArea(SkIRect::MakeXYWH(0, 0, kContentSize, 1), SK_ColorBLUE);
contentBM.eraseArea(SkIRect::MakeXYWH(0, 0, 1, kContentSize), SK_ColorBLUE);
contentBM.eraseArea(SkIRect::MakeXYWH(kContentSize-1, 0, 1, kContentSize), SK_ColorBLUE);
contentBM.eraseArea(SkIRect::MakeXYWH(0, kContentSize-1, kContentSize, 1), SK_ColorBLUE);
}
SkBitmap bigBM;
{
const int kLeft = contentRect.fLeft;
const int kTop = contentRect.fTop;
SkImageInfo bigInfo = SkImageInfo::Make(fullSize.fWidth, fullSize.fHeight,
kRGBA_8888_SkColorType, kOpaque_SkAlphaType);
bigBM.allocPixels(bigInfo);
bigBM.eraseColor(SK_ColorBLACK);
const char* src = static_cast<const char*>(contentBM.getPixels());
size_t srcRB = contentBM.rowBytes();
size_t dstRB = bigBM.rowBytes();
if (USE_LAZY_PROXIES && origin == kBottomLeft_GrSurfaceOrigin) {
char* dst = static_cast<char*>(bigBM.getAddr(kLeft, fullSize.height() - kTop - 1));
for (int y = 0; y < contentBM.height(); ++y) {
memcpy(dst, src, srcRB);
src = src + srcRB;
dst = dst - dstRB;
}
} else {
char* dst = static_cast<char*>(bigBM.getAddr(kLeft, kTop));
SkRectMemcpy(dst, dstRB, src, srcRB,
contentBM.rowBytes(), contentBM.height());
}
bigBM.setAlphaType(kOpaque_SkAlphaType);
bigBM.setImmutable();
}
return bigBM;
}
static void draw_texture(const GrCaps* caps,
GrSurfaceDrawContext* sdc,
const GrSurfaceProxyView& src,
const SkIRect& srcRect,
const SkIRect& drawRect,
const SkMatrix& mat,
GrSamplerState::WrapMode xTileMode,
GrSamplerState::WrapMode yTileMode) {
GrSamplerState sampler(xTileMode, yTileMode, SkFilterMode::kNearest);
auto fp = GrTextureEffect::MakeSubset(src, kOpaque_SkAlphaType, mat,
sampler, SkRect::Make(srcRect), *caps);
GrPaint paint;
paint.setColorFragmentProcessor(std::move(fp));
sdc->drawRect(nullptr, std::move(paint), GrAA::kNo, SkMatrix::I(), SkRect::Make(drawRect));
}
namespace skiagm {
// This GM exercises all the different tile modes for a texture that cannot be normalized
// early (i.e., rectangle or fully-lazy).
// TODO: should we also test w/ mipmapping?
class LazyTilingGM : public GpuGM {
public:
LazyTilingGM(GrSurfaceOrigin origin)
: fOrigin(origin)
, fContentRect(SkIRect::MakeXYWH(kLeftContentOffset, kTopContentOffset,
kContentSize, kContentSize)) {
this->setBGColor(0xFFCCCCCC);
}
protected:
SkString onShortName() override {
return SkStringPrintf("lazytiling_%s", fOrigin == kTopLeft_GrSurfaceOrigin ? "tl" : "bl");
}
SkISize onISize() override {
return SkISize::Make(kTotalWidth, kTotalHeight);
}
DrawResult onGpuSetup(GrDirectContext* dContext, SkString* errorMsg) override {
if (!dContext || dContext->abandoned()) {
return DrawResult::kSkip;
}
auto bm = create_bitmap(fContentRect,
{ kLeftContentOffset + kContentSize + kRightContentPadding,
kTopContentOffset + kContentSize + kBottomContentPadding },
fOrigin);
fView = create_view(dContext, bm, fOrigin);
if (!fView.proxy()) {
*errorMsg = "Failed to create proxy";
return DrawResult::kFail;
}
return DrawResult::kOk;
}
void onDraw(GrRecordingContext* rContext, GrSurfaceDrawContext* sdc,
SkCanvas* canvas) override {
SkSamplingOptions sampling(SkFilterMode::kNearest, SkMipmapMode::kNone);
SkPaint p;
int y = kPad;
for (auto yMode : { SkTileMode::kClamp, SkTileMode::kRepeat,
SkTileMode::kMirror, SkTileMode::kDecal }) {
int x = kPad;
for (auto xMode : { SkTileMode::kClamp, SkTileMode::kRepeat,
SkTileMode::kMirror, SkTileMode::kDecal }) {
SkIRect cellRect = SkIRect::MakeXYWH(x, y, 2*kContentSize, 2*kContentSize);
SkRect contentRect = SkRect::MakeXYWH(x+kContentSize/2, y+kContentSize/2,
kContentSize, kContentSize);
SkMatrix texMatrix = SkMatrix::RectToRect(contentRect, SkRect::Make(fContentRect));
draw_texture(rContext->priv().caps(),
sdc,
fView,
fContentRect,
cellRect,
texMatrix,
SkTileModeToWrapMode(xMode),
SkTileModeToWrapMode(yMode));
x += 2*kContentSize+kPad;
}
y += 2*kContentSize+kPad;
}
}
private:
static constexpr int kLeftContentOffset = 8;
static constexpr int kTopContentOffset = 16;
static constexpr int kRightContentPadding = 24;
static constexpr int kBottomContentPadding = 80;
static constexpr int kPad = 4; // on-screen padding between cells
static constexpr int kContentSize = 32;
// Each cell in this GM's grid is a square - 2*kContentSize on a side
static constexpr int kTotalWidth = (2*kContentSize+kPad) * kSkTileModeCount + kPad;
static constexpr int kTotalHeight = (2*kContentSize+kPad) * kSkTileModeCount + kPad;
GrSurfaceOrigin fOrigin;
SkIRect fContentRect;
GrSurfaceProxyView fView;
using INHERITED = GM;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM(return new LazyTilingGM(kTopLeft_GrSurfaceOrigin);)
DEF_GM(return new LazyTilingGM(kBottomLeft_GrSurfaceOrigin);)
} // namespace skiagm
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