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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef UI_GFX_GDI_UTIL_H_ | |
6 #define UI_GFX_GDI_UTIL_H_ | |
7 | |
8 #include <vector> | |
9 #include <windows.h> | |
10 | |
11 #include "ui/gfx/gfx_export.h" | |
12 #include "ui/gfx/rect.h" | |
13 #include "ui/gfx/path.h" | |
14 | |
15 namespace gfx { | |
16 | |
17 // Creates a BITMAPINFOHEADER structure given the bitmap's size. | |
18 GFX_EXPORT void CreateBitmapHeader(int width, int height, | |
19 BITMAPINFOHEADER* hdr); | |
20 | |
21 // Creates a BITMAPV4HEADER structure given the bitmap's size. You probably | |
22 // only need to use BMP V4 if you need transparency (alpha channel). This | |
23 // function sets the AlphaMask to 0xff000000. | |
24 GFX_EXPORT void CreateBitmapV4Header(int width, int height, | |
25 BITMAPV4HEADER* hdr); | |
26 | |
27 // Creates a monochrome bitmap header. | |
28 void CreateMonochromeBitmapHeader(int width, int height, BITMAPINFOHEADER* hdr); | |
29 | |
30 // Modify the given hrgn by subtracting the given rectangles. | |
31 GFX_EXPORT void SubtractRectanglesFromRegion( | |
32 HRGN hrgn, | |
33 const std::vector<gfx::Rect>& cutouts); | |
34 | |
35 GFX_EXPORT HRGN ConvertPathToHRGN(const gfx::Path& path); | |
36 | |
37 // Calculate scale to fit an entire page on DC. | |
38 GFX_EXPORT float CalculatePageScale(HDC dc, int page_width, int page_height); | |
39 | |
40 // Apply scaling to the DC. | |
41 GFX_EXPORT bool ScaleDC(HDC dc, float scale_factor); | |
42 | |
43 GFX_EXPORT void StretchDIBits(HDC hdc, | |
44 int dest_x, int dest_y, int dest_w, int dest_h, | |
45 int src_x, int src_y, int src_w, int src_h, | |
46 void* pixels, const BITMAPINFO* bitmap_info); | |
47 | |
48 } // namespace gfx | |
49 | |
50 #endif // UI_GFX_GDI_UTIL_H_ | |
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