1 /*
2 * Copyright 2006 The Android Open Source Project
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "include/core/SkColorType.h"
9 #include "include/core/SkPaint.h"
10 #include "include/core/SkPixmap.h"
11 #include "include/core/SkTypes.h"
12 #include "include/private/base/SkCPUTypes.h"
13 #include "src/base/SkArenaAlloc.h"
14 #include "src/core/SkBlitRow.h"
15 #include "src/core/SkSpriteBlitter.h"
16
17 #include <cstddef>
18 #include <cstdint>
19
20 ///////////////////////////////////////////////////////////////////////////////
21
22 class Sprite_D32_S32 : public SkSpriteBlitter {
23 public:
Sprite_D32_S32(const SkPixmap & src,U8CPU alpha)24 Sprite_D32_S32(const SkPixmap& src, U8CPU alpha) : INHERITED(src) {
25 SkASSERT(src.colorType() == kN32_SkColorType);
26
27 unsigned flags32 = 0;
28 if (255 != alpha) {
29 flags32 |= SkBlitRow::kGlobalAlpha_Flag32;
30 }
31 if (!src.isOpaque()) {
32 flags32 |= SkBlitRow::kSrcPixelAlpha_Flag32;
33 }
34
35 fProc32 = SkBlitRow::Factory32(flags32);
36 fAlpha = alpha;
37 }
38
blitRect(int x,int y,int width,int height)39 void blitRect(int x, int y, int width, int height) override {
40 SkASSERT(width > 0 && height > 0);
41 uint32_t* SK_RESTRICT dst = fDst.writable_addr32(x, y);
42 const uint32_t* SK_RESTRICT src = fSource.addr32(x - fLeft, y - fTop);
43 size_t dstRB = fDst.rowBytes();
44 size_t srcRB = fSource.rowBytes();
45 SkBlitRow::Proc32 proc = fProc32;
46 U8CPU alpha = fAlpha;
47
48 do {
49 proc(dst, src, width, alpha);
50 dst = (uint32_t* SK_RESTRICT)((char*)dst + dstRB);
51 src = (const uint32_t* SK_RESTRICT)((const char*)src + srcRB);
52 } while (--height != 0);
53 }
54
55 private:
56 SkBlitRow::Proc32 fProc32;
57 U8CPU fAlpha;
58
59 using INHERITED = SkSpriteBlitter;
60 };
61
62 ///////////////////////////////////////////////////////////////////////////////
63
ChooseL32(const SkPixmap & source,const SkPaint & paint,SkArenaAlloc * allocator)64 SkSpriteBlitter* SkSpriteBlitter::ChooseL32(const SkPixmap& source, const SkPaint& paint,
65 SkArenaAlloc* allocator) {
66 SkASSERT(allocator != nullptr);
67
68 if (paint.getColorFilter() != nullptr) {
69 return nullptr;
70 }
71 if (paint.getMaskFilter() != nullptr) {
72 return nullptr;
73 }
74 if (source.colorType() == kN32_SkColorType && paint.isSrcOver()) {
75 // this can handle alpha, but not xfermode
76 return allocator->make<Sprite_D32_S32>(source, paint.getAlpha());
77 }
78 return nullptr;
79 }
80