| // Copyright 2012 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef UI_GFX_GDI_UTIL_H_ |
| #define UI_GFX_GDI_UTIL_H_ |
| |
| #include <windows.h> |
| |
| #include "base/component_export.h" |
| #include "ui/gfx/geometry/rect.h" |
| |
| namespace gfx { |
| |
| // Creates a BITMAPV4HEADER structure given the bitmap's size. You probably |
| // only need to use BMP V4 if you need transparency (alpha channel). This |
| // function sets the AlphaMask to 0xff000000, meaning this header is for a |
| // 32-bits-per-pixel ARGB8888 bitmap. |
| COMPONENT_EXPORT(GFX) |
| void CreateBitmapV4HeaderForARGB888(int width, int height, BITMAPV4HEADER* hdr); |
| |
| // Calculate scale to fit an entire page on DC. |
| COMPONENT_EXPORT(GFX) |
| float CalculatePageScale(HDC dc, int page_width, int page_height); |
| |
| // Apply scaling to the DC. |
| COMPONENT_EXPORT(GFX) bool ScaleDC(HDC dc, float scale_factor); |
| |
| } // namespace gfx |
| |
| #endif // UI_GFX_GDI_UTIL_H_ |
