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 BITMAPINFOHEADER structure given the bitmap's size and 22 // color depth in bits per pixel. 23 void CreateBitmapHeaderWithColorDepth(int width, int height, int color_depth, 24 BITMAPINFOHEADER* hdr); 25 26 // Creates a BITMAPV4HEADER structure given the bitmap's size. You probably 27 // only need to use BMP V4 if you need transparency (alpha channel). This 28 // function sets the AlphaMask to 0xff000000. 29 GFX_EXPORT void CreateBitmapV4Header(int width, int height, 30 BITMAPV4HEADER* hdr); 31 32 // Creates a monochrome bitmap header. 33 void CreateMonochromeBitmapHeader(int width, int height, BITMAPINFOHEADER* hdr); 34 35 // Modify the given hrgn by subtracting the given rectangles. 36 GFX_EXPORT void SubtractRectanglesFromRegion( 37 HRGN hrgn, 38 const std::vector<gfx::Rect>& cutouts); 39 40 GFX_EXPORT HRGN ConvertPathToHRGN(const gfx::Path& path); 41 42 // Calculate scale to fit an entire page on DC. 43 GFX_EXPORT double CalculatePageScale(HDC dc, int page_width, int page_height); 44 45 // Apply scaling to the DC. 46 GFX_EXPORT bool ScaleDC(HDC dc, double scale_factor); 47 48 GFX_EXPORT void StretchDIBits(HDC hdc, 49 int dest_x, int dest_y, int dest_w, int dest_h, 50 int src_x, int src_y, int src_w, int src_h, 51 void* pixels, const BITMAPINFO* bitmap_info); 52 53 } // namespace gfx 54 55 #endif // UI_GFX_GDI_UTIL_H_ 56
