| /* |
| * 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); |
| } |
| } |