| /* |
| * 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" |
| |
| 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 |= SkXfermode::kSrcIsOpaque_PM4fFlag; |
| } |
| if (kSRGB_SkColorProfileType == profile) { |
| flags |= SkXfermode::kDstIsSRGB_PM4fFlag; |
| } |
| |
| const SkXfermode::PM4fState state { nullptr, flags }; |
| |
| const SkPM4f src = SkColor4f::FromColor(c).premul(); |
| auto proc1 = SkXfermode::GetPM4fProc1(SkXfermode::kSrcOver_Mode, flags); |
| for (int y = 0; y < ir.height()/2; ++y) { |
| proc1(state, pm.writable_addr32(0, y), src, ir.width(), nullptr); |
| } |
| |
| SkPM4f srcRow[1000]; |
| for (int i = 0; i < ir.width(); ++i) { |
| srcRow[i] = src; |
| } |
| auto procN = SkXfermode::GetPM4fProcN(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(state, pm.writable_addr32(0, y), srcRow, ir.width(), nullptr); |
| } |
| |
| 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); |
| } |
| } |