diff options
Diffstat (limited to 'gm/xfer4f.cpp')
-rw-r--r-- | gm/xfer4f.cpp | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/gm/xfer4f.cpp b/gm/xfer4f.cpp new file mode 100644 index 0000000000..1951fdbde2 --- /dev/null +++ b/gm/xfer4f.cpp @@ -0,0 +1,83 @@ +/* + * 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 "SkXfer4f.h" + +static void draw_rect(SkCanvas* canvas, const SkRect& r, SkColor c, SkColorProfileType profile) { + const SkIRect ir = r.round(); + + SkBitmap bm; + bm.allocN32Pixels(ir.width(), ir.height()); + bm.eraseColor(0xFFFFFFFF); + SkPixmap pm; + bm.peekPixels(&pm); + + uint32_t flags = 0; + if (SkColorGetA(c) == 0xFF) { + flags |= kSrcIsOpaque_SkXfer4fFlag; + } + if (kSRGB_SkColorProfileType == profile) { + flags |= kDstIsSRGB_SkXfer4fFlag; + } + + const SkPM4f src = SkPM4f::FromPMColor(SkPreMultiplyColor(c)); + auto proc1 = SkPM4fXfer1ProcFactory(SkXfermode::kSrcOver_Mode, flags); + for (int y = 0; y < ir.height()/2; ++y) { + proc1(pm.writable_addr32(0, y), src, ir.width()); + } + + SkPM4f srcRow[1000]; + for (int i = 0; i < ir.width(); ++i) { + srcRow[i] = src; + } + auto procN = SkPM4fXferNProcFactory(SkXfermode::kSrcOver_Mode, flags); + // +1 to skip a row, so we can see the boundary between proc1 and procN + for (int y = ir.height()/2 + 1; y < ir.height(); ++y) { + procN(pm.writable_addr32(0, y), srcRow, ir.width()); + } + + canvas->drawBitmap(bm, r.left(), r.top(), nullptr); +} + +/* + * Test SkXfer4fProcs directly for src-over, comparing them to current SkColor blits. + */ +DEF_SIMPLE_GM(xfer4f_srcover, canvas, 580, 380) { + const SkScalar W = 50; + const SkScalar H = 100; + + const int profiles[] = { + -1, + kLinear_SkColorProfileType, + kSRGB_SkColorProfileType, + }; + const SkColor colors[] = { + SK_ColorBLACK, SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, + 0x88000000, 0x88FF0000, 0x8800FF00, 0x880000FF + }; + canvas->translate(20, 20); + + const SkRect r = SkRect::MakeWH(W, H); + for (auto profile : profiles) { + canvas->save(); + for (SkColor c : colors) { + if (profile < 0) { + SkPaint p; + p.setColor(c); + canvas->drawRect(r, p); + } else { + draw_rect(canvas, r, c, (SkColorProfileType)profile); + } + canvas->translate(W + 20, 0); + } + canvas->restore(); + canvas->translate(0, H + 20); + } +} |