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author | 2015-08-28 09:58:54 +0800 | |
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committer | 2015-09-01 12:44:00 +0800 | |
commit | e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch) | |
tree | 66b09f592c55df2878107a468a91d21506104d3f /qemu/roms/seabios/src/bmp.c | |
parent | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff) |
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/roms/seabios/src/bmp.c')
-rw-r--r-- | qemu/roms/seabios/src/bmp.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/qemu/roms/seabios/src/bmp.c b/qemu/roms/seabios/src/bmp.c new file mode 100644 index 000000000..d8e76b789 --- /dev/null +++ b/qemu/roms/seabios/src/bmp.c @@ -0,0 +1,117 @@ +/* +* Basic BMP data process and Raw picture data handle functions. +* Could be used to adjust pixel data format, get infomation, etc. +* +* Copyright (C) 2011 Wayne Xia <xiawenc@cn.ibm.com> +* +* This work is licensed under the terms of the GNU LGPLv3. +*/ +#include "malloc.h" // malloc_tmphigh +#include "string.h" // memcpy +#include "util.h" // struct bmp_decdata + +struct bmp_decdata { + struct tagRGBQUAD *quadp; + unsigned char *datap; + int width; + int height; + int bpp; +}; + +#define bmp_load4byte(addr) (*(u32 *)(addr)) +#define bmp_load2byte(addr) (*(u16 *)(addr)) + +typedef struct tagBITMAPFILEHEADER { + u8 bfType[2]; + u8 bfSize[4]; + u8 bfReserved1[2]; + u8 bfReserved2[2]; + u8 bfOffBits[4]; +} BITMAPFILEHEADER, tagBITMAPFILEHEADER; + +typedef struct tagBITMAPINFOHEADER { + u8 biSize[4]; + u8 biWidth[4]; + u8 biHeight[4]; + u8 biPlanes[2]; + u8 biBitCount[2]; + u8 biCompression[4]; + u8 biSizeImage[4]; + u8 biXPelsPerMeter[4]; + u8 biYPelsPerMeter[4]; + u8 biClrUsed[4]; + u8 biClrImportant[4]; +} BITMAPINFOHEADER, tagBITMAPINFOHEADER; + +typedef struct tagRGBQUAD { + u8 rgbBlue; + u8 rgbGreen; + u8 rgbRed; + u8 rgbReserved; +} RGBQUAD, tagRGBQUAD; + +/* flat picture data adjusting function +* description: +* switch the vertical line sequence +* arrange horizontal pixel data, add extra space in the dest buffer +* for every line +*/ +static void raw_data_format_adjust_24bpp(u8 *src, u8 *dest, int width, + int height, int bytes_per_line_dest) +{ + int bytes_per_line_src = 3 * width; + int i; + for (i = 0 ; i < height ; i++) { + memcpy(dest + i * bytes_per_line_dest, + src + (height - 1 - i) * bytes_per_line_src, bytes_per_line_src); + } +} + +/* allocate decdata struct */ +struct bmp_decdata *bmp_alloc(void) +{ + struct bmp_decdata *bmp = malloc_tmphigh(sizeof(*bmp)); + return bmp; +} + +/* extract information from bmp file data */ +int bmp_decode(struct bmp_decdata *bmp, unsigned char *data, int data_size) +{ + if (data_size < 54) + return 1; + + u16 bmp_filehead = bmp_load2byte(data + 0); + if (bmp_filehead != 0x4d42) + return 2; + u32 bmp_recordsize = bmp_load4byte(data + 2); + if (bmp_recordsize != data_size) + return 3; + u32 bmp_dataoffset = bmp_load4byte(data + 10); + bmp->datap = (unsigned char *)data + bmp_dataoffset; + bmp->width = bmp_load4byte(data + 18); + bmp->height = bmp_load4byte(data + 22); + bmp->bpp = bmp_load2byte(data + 28); + return 0; +} + +/* get bmp properties */ +void bmp_get_size(struct bmp_decdata *bmp, int *width, int *height) +{ + *width = bmp->width; + *height = bmp->height; +} + +/* flush flat picture data to *pc */ +int bmp_show(struct bmp_decdata *bmp, unsigned char *pic, int width + , int height, int depth, int bytes_per_line_dest) +{ + if (bmp->datap == pic) + return 0; + /* now only support 24bpp bmp file */ + if ((depth == 24) && (bmp->bpp == 24)) { + raw_data_format_adjust_24bpp(bmp->datap, pic, width, height, + bytes_per_line_dest); + return 0; + } + return 1; +} |