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/base/ui_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 UI_EXPORT void CreateBitmapHeader(int width, int height, BITMAPINFOHEADER* hdr); 19 20 // Creates a BITMAPINFOHEADER structure given the bitmap's size and 21 // color depth in bits per pixel. 22 void CreateBitmapHeaderWithColorDepth(int width, int height, int color_depth, 23 BITMAPINFOHEADER* hdr); 24 25 // Creates a BITMAPV4HEADER structure given the bitmap's size. You probably 26 // only need to use BMP V4 if you need transparency (alpha channel). This 27 // function sets the AlphaMask to 0xff000000. 28 UI_EXPORT void CreateBitmapV4Header(int width, int height, BITMAPV4HEADER* hdr); 29 30 // Creates a monochrome bitmap header. 31 void CreateMonochromeBitmapHeader(int width, int height, BITMAPINFOHEADER* hdr); 32 33 // Modify the given hrgn by subtracting the given rectangles. 34 UI_EXPORT void SubtractRectanglesFromRegion( 35 HRGN hrgn, 36 const std::vector<gfx::Rect>& cutouts); 37 38 UI_EXPORT HRGN ConvertPathToHRGN(const gfx::Path& path); 39 40 // Calculate scale to fit an entire page on DC. 41 UI_EXPORT double CalculatePageScale(HDC dc, int page_width, int page_height); 42 43 // Apply scaling to the DC. 44 UI_EXPORT bool ScaleDC(HDC dc, double scale_factor); 45 46 UI_EXPORT void StretchDIBits(HDC hdc, 47 int dest_x, int dest_y, int dest_w, int dest_h, 48 int src_x, int src_y, int src_w, int src_h, 49 void* pixels, const BITMAPINFO* bitmap_info); 50 51 } // namespace gfx 52 53 #endif // UI_GFX_GDI_UTIL_H_ 54
