/src/libreoffice/include/vcl/RawBitmap.hxx
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1 | | /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ |
2 | | /* |
3 | | * This file is part of the LibreOffice project. |
4 | | * |
5 | | * This Source Code Form is subject to the terms of the Mozilla Public |
6 | | * License, v. 2.0. If a copy of the MPL was not distributed with this |
7 | | * file, You can obtain one at http://mozilla.org/MPL/2.0/. |
8 | | */ |
9 | | |
10 | | #pragma once |
11 | | |
12 | | #include <o3tl/safeint.hxx> |
13 | | #include <vcl/BitmapColor.hxx> |
14 | | #include <vcl/bitmap.hxx> |
15 | | |
16 | | namespace vcl::bitmap |
17 | | { |
18 | | /** |
19 | | * Intended to be used to feed into CreateFromData to create a Bitmap. RGB data format. |
20 | | */ |
21 | | class VCL_DLLPUBLIC RawBitmap |
22 | | { |
23 | | friend Bitmap VCL_DLLPUBLIC CreateFromData(RawBitmap&& rawBitmap); |
24 | | std::unique_ptr<sal_uInt8[]> mpData; |
25 | | Size maSize; |
26 | | sal_uInt8 mnBitCount; |
27 | | |
28 | | public: |
29 | | RawBitmap(Size const& rSize, sal_uInt8 nBitCount) |
30 | 657k | : maSize(rSize) |
31 | 657k | , mnBitCount(nBitCount) |
32 | 657k | { |
33 | 657k | assert(nBitCount == 24 || nBitCount == 32); |
34 | 657k | if (rSize.getWidth() > std::numeric_limits<sal_Int32>::max() || rSize.getWidth() < 0) |
35 | 1.57k | throw std::bad_alloc(); |
36 | 656k | if (rSize.getHeight() > std::numeric_limits<sal_Int32>::max() || rSize.getHeight() < 0) |
37 | 229 | throw std::bad_alloc(); |
38 | 656k | sal_Int32 nRowSize, nDataSize; |
39 | 656k | if (o3tl::checked_multiply<sal_Int32>(rSize.getWidth(), nBitCount / 8, nRowSize) |
40 | 655k | || o3tl::checked_multiply<sal_Int32>(nRowSize, rSize.getHeight(), nDataSize) |
41 | 655k | || nDataSize < 0) |
42 | 454 | { |
43 | 454 | throw std::bad_alloc(); |
44 | 454 | } |
45 | 655k | mpData.reset(new sal_uInt8[nDataSize]); |
46 | 655k | } |
47 | | void SetPixel(tools::Long nY, tools::Long nX, Color nColor) |
48 | 482M | { |
49 | 482M | tools::Long p = (nY * maSize.getWidth() + nX) * (mnBitCount / 8); |
50 | 482M | mpData[p++] = nColor.GetRed(); |
51 | 482M | mpData[p++] = nColor.GetGreen(); |
52 | 482M | mpData[p++] = nColor.GetBlue(); |
53 | 482M | if (mnBitCount == 32) |
54 | 1.30M | mpData[p] = nColor.GetAlpha(); |
55 | 482M | } |
56 | | void SetAlpha(tools::Long nY, tools::Long nX, sal_uInt8 nAlpha) |
57 | 375k | { |
58 | 375k | assert(mnBitCount == 32); |
59 | 375k | tools::Long p = (nY * maSize.getWidth() + nX) * (mnBitCount / 8) + 3; |
60 | 375k | mpData[p] = nAlpha; |
61 | 375k | } |
62 | | Color GetPixel(tools::Long nY, tools::Long nX) const |
63 | 4.24M | { |
64 | 4.24M | tools::Long p = (nY * maSize.getWidth() + nX) * mnBitCount / 8; |
65 | 4.24M | if (mnBitCount == 24) |
66 | 3.28M | return Color(mpData[p], mpData[p + 1], mpData[p + 2]); |
67 | 961k | else |
68 | 961k | return Color(ColorAlpha, mpData[p + 3], mpData[p], mpData[p + 1], mpData[p + 2]); |
69 | 4.24M | } |
70 | | // so we don't accidentally leave any code in that uses palette color indexes |
71 | | void SetPixel(tools::Long nY, tools::Long nX, BitmapColor nColor) = delete; |
72 | 693 | tools::Long Height() const { return maSize.Height(); } |
73 | 5.54k | tools::Long Width() const { return maSize.Width(); } |
74 | 637k | sal_uInt8 GetBitCount() const { return mnBitCount; } |
75 | | }; |
76 | | |
77 | | } // end vcl::bitmap |
78 | | |
79 | | /* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |