license.bot | f003cfe | 2008-08-24 09:55:55 +0900 | [diff] [blame^] | 1 | // Copyright (c) 2006-2008 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. |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 4 | |
| 5 | #include "base/gfx/bitmap_header.h" |
| 6 | |
| 7 | namespace gfx { |
| 8 | |
| 9 | void CreateBitmapHeader(int width, int height, BITMAPINFOHEADER* hdr) { |
| 10 | CreateBitmapHeaderWithColorDepth(width, height, 32, hdr); |
| 11 | } |
| 12 | |
| 13 | void CreateBitmapHeaderWithColorDepth(int width, int height, int color_depth, |
| 14 | BITMAPINFOHEADER* hdr) { |
| 15 | // These values are shared with gfx::PlatformDevice |
| 16 | hdr->biSize = sizeof(BITMAPINFOHEADER); |
| 17 | hdr->biWidth = width; |
| 18 | hdr->biHeight = -height; // minus means top-down bitmap |
| 19 | hdr->biPlanes = 1; |
| 20 | hdr->biBitCount = color_depth; |
| 21 | hdr->biCompression = BI_RGB; // no compression |
| 22 | hdr->biSizeImage = 0; |
| 23 | hdr->biXPelsPerMeter = 1; |
| 24 | hdr->biYPelsPerMeter = 1; |
| 25 | hdr->biClrUsed = 0; |
| 26 | hdr->biClrImportant = 0; |
| 27 | } |
| 28 | |
| 29 | |
| 30 | void CreateBitmapV4Header(int width, int height, BITMAPV4HEADER* hdr) { |
| 31 | // Because bmp v4 header is just an extension, we just create a v3 header and |
| 32 | // copy the bits over to the v4 header. |
| 33 | BITMAPINFOHEADER header_v3; |
| 34 | CreateBitmapHeader(width, height, &header_v3); |
| 35 | memset(hdr, 0, sizeof(BITMAPV4HEADER)); |
| 36 | memcpy(hdr, &header_v3, sizeof(BITMAPINFOHEADER)); |
| 37 | |
| 38 | // Correct the size of the header and fill in the mask values. |
| 39 | hdr->bV4Size = sizeof(BITMAPV4HEADER); |
| 40 | hdr->bV4RedMask = 0x00ff0000; |
| 41 | hdr->bV4GreenMask = 0x0000ff00; |
| 42 | hdr->bV4BlueMask = 0x000000ff; |
| 43 | hdr->bV4AlphaMask = 0xff000000; |
| 44 | } |
| 45 | |
| 46 | // Creates a monochrome bitmap header. |
| 47 | void CreateMonochromeBitmapHeader(int width, |
| 48 | int height, |
| 49 | BITMAPINFOHEADER* hdr) { |
| 50 | hdr->biSize = sizeof(BITMAPINFOHEADER); |
| 51 | hdr->biWidth = width; |
| 52 | hdr->biHeight = -height; |
| 53 | hdr->biPlanes = 1; |
| 54 | hdr->biBitCount = 1; |
| 55 | hdr->biCompression = BI_RGB; |
| 56 | hdr->biSizeImage = 0; |
| 57 | hdr->biXPelsPerMeter = 1; |
| 58 | hdr->biYPelsPerMeter = 1; |
| 59 | hdr->biClrUsed = 0; |
| 60 | hdr->biClrImportant = 0; |
| 61 | } |
| 62 | |
| 63 | } // namespace gfx |
license.bot | f003cfe | 2008-08-24 09:55:55 +0900 | [diff] [blame^] | 64 | |