diff options
author | reed <reed@chromium.org> | 2016-02-09 09:14:59 -0800 |
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committer | Commit bot <commit-bot@chromium.org> | 2016-02-09 09:14:59 -0800 |
commit | d2ed622a2fc574288b312ec1ff94c77ed6e70476 (patch) | |
tree | 6f8deeeff2b47c76cbd706c1a41b7efc8efbc419 /gm | |
parent | 918090c819109585f8fd2295039385a60eb0b572 (diff) |
start experimenting with 64bit frame-buffers
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1680523002
Review URL: https://codereview.chromium.org/1680523002
Diffstat (limited to 'gm')
-rw-r--r-- | gm/xferu64.cpp | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/gm/xferu64.cpp b/gm/xferu64.cpp new file mode 100644 index 0000000000..03fc8864b5 --- /dev/null +++ b/gm/xferu64.cpp @@ -0,0 +1,149 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "gm.h" +#include "SkCanvas.h" +#include "SkImageInfo.h" +#include "SkXfermode.h" +#include "SkHalf.h" +#include "SkImage.h" + +static SkPMColor f16_to_pmcolor(uint64_t src) { + SkPMColor dst; + const SkHalf* sptr = reinterpret_cast<const SkHalf*>(&src); + uint8_t* dptr = reinterpret_cast<uint8_t*>(&dst); + for (int i = 0; i < 4; ++i) { + float f = SkHalfToFloat(sptr[i]); + dptr[i] = SkToU8((int)(f * 255 + 0.5f)); + } + return dst; +} + +static SkPMColor u16_to_pmcolor(uint64_t src) { + SkPMColor dst; + const uint16_t* sptr = reinterpret_cast<const uint16_t*>(&src); + uint8_t* dptr = reinterpret_cast<uint8_t*>(&dst); + for (int i = 0; i < 4; ++i) { + dptr[i] = sptr[i] >> 8; + } + return dst; +} + +static SkImage* new_u64_image(const SkBitmap& src, uint32_t flags) { + SkBitmap dst; + dst.allocN32Pixels(src.width(), src.height()); + SkPixmap srcPM, dstPM; + src.peekPixels(&srcPM); + dst.peekPixels(&dstPM); + + for (int y = 0; y < srcPM.height(); ++y) { + for (int x = 0; x < srcPM.width(); ++x) { + uint64_t srcP = *srcPM.addr64(x, y); + uint32_t* dstP = dstPM.writable_addr32(x, y); + + if (flags & SkXfermode::kDstIsFloat16_U64Flag) { + *dstP = f16_to_pmcolor(srcP); + } else { + *dstP = u16_to_pmcolor(srcP); + } + } + } + return SkImage::NewRasterCopy(dstPM.info(), dstPM.addr(), dstPM.rowBytes()); +} + +static void draw_rect(SkCanvas* canvas, const SkRect& r, SkColor c, uint32_t u64_flags, + const SkAlpha aa[]) { + const SkIRect ir = r.round(); + const SkImageInfo info = SkImageInfo::Make(ir.width(), ir.height(), + kRGBA_F16_SkColorType, kPremul_SkAlphaType); + + SkBitmap bm; + bm.allocPixels(info); + SkPixmap pm; + bm.peekPixels(&pm); + memset(pm.writable_addr(), 0, pm.getSafeSize()); + + if (SkColorGetA(c) == 0xFF) { + u64_flags |= SkXfermode::kSrcIsOpaque_PM4fFlag; + } + + const SkXfermode::U64State state { nullptr, u64_flags }; + + const SkPM4f src = SkColor4f::FromColor(c).premul(); + auto proc1 = SkXfermode::GetU64Proc1(SkXfermode::kSrcOver_Mode, u64_flags); + for (int y = 0; y < ir.height()/2; ++y) { + proc1(state, pm.writable_addr64(0, y), src, ir.width(), aa); + } + + SkPM4f buffer[1000]; + for (int i = 0; i < ir.width(); ++i) { + buffer[i] = src; + } + auto procN = SkXfermode::GetU64ProcN(SkXfermode::kSrcOver_Mode, u64_flags); + for (int y = ir.height()/2 + 1; y < ir.height(); ++y) { + procN(state, pm.writable_addr64(0, y), buffer, ir.width(), aa); + } + + SkAutoTUnref<SkImage> image(new_u64_image(bm, u64_flags)); + canvas->drawImage(image, r.left(), r.top(), nullptr); +} + +/* + * Test SkXfer4fProcs directly for src-over, comparing them to current SkColor blits. + */ +DEF_SIMPLE_GM(xfer_u64_srcover, canvas, 580, 760) { + const int IW = 50; + const SkScalar W = IW; + const SkScalar H = 100; + + const int32_t flags[] = { + -1, // normal + 0, // U16 components + SkXfermode::kDstIsFloat16_U64Flag, // F16 components + }; + const SkColor colors[] = { + SK_ColorBLACK, SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, + 0x88000000, 0x88FF0000, 0x8800FF00, 0x880000FF + }; + + uint8_t aa_scanline[IW]; + for (int i = 0; i < IW; ++i) { + aa_scanline[i] = i * 255 / (IW - 1); + } + uint8_t const* aa_table[] = { nullptr, aa_scanline }; + + SkBitmap mask; + mask.installPixels(SkImageInfo::MakeA8(IW, 1), aa_scanline, IW); + + canvas->translate(20, 20); + + const SkRect r = SkRect::MakeWH(W, H); + for (const uint8_t* aa : aa_table) { + canvas->save(); + for (auto flag : flags) { + canvas->save(); + for (SkColor c : colors) { + if (flag < 0) { + SkPaint p; + p.setColor(c); + if (aa) { + canvas->drawBitmapRect(mask, r, &p); + } else { + canvas->drawRect(r, p); + } + } else { + draw_rect(canvas, r, c, flag, aa); + } + canvas->translate(W + 20, 0); + } + canvas->restore(); + canvas->translate(0, H + 20); + } + canvas->restore(); + canvas->translate(0, (H + 20) * SK_ARRAY_COUNT(flags) + 20); + } +} |