forked from len0rd/rockbox
initial BMP image reader attempt, does not work yet
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@579 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Daniel Stenberg
parent
48b3f5157a
commit
766a0ae4be
1 changed files with 566 additions and 0 deletions
566
uisimulator/bmp.c
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566
uisimulator/bmp.c
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2002 by Linus Nielsen Feltzing
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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/*********************************************************************
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*
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* Converts BMP files to Rockbox bitmap format
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*
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* 1999-05-03 Linus Nielsen Feltzing
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*
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**********************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdbool.h>
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#include "file.h"
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#ifdef __GNUC__
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#define STRUCT_PACKED __attribute__((packed))
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#endif
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struct Fileheader
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{
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unsigned short Type; /* signature - 'BM' */
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unsigned long Size; /* file size in bytes */
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unsigned short Reserved1; /* 0 */
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unsigned short Reserved2; /* 0 */
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unsigned long OffBits; /* offset to bitmap */
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unsigned long StructSize; /* size of this struct (40) */
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unsigned long Width; /* bmap width in pixels */
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unsigned long Height; /* bmap height in pixels */
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unsigned short Planes; /* num planes - always 1 */
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unsigned short BitCount; /* bits per pixel */
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unsigned long Compression; /* compression flag */
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unsigned long SizeImage; /* image size in bytes */
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long XPelsPerMeter; /* horz resolution */
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long YPelsPerMeter; /* vert resolution */
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unsigned long ClrUsed; /* 0 -> color table size */
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unsigned long ClrImportant; /* important color count */
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} STRUCT_PACKED;
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struct RGBQUAD
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{
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unsigned char rgbBlue;
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unsigned char rgbGreen;
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unsigned char rgbRed;
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unsigned char rgbReserved;
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} STRUCT_PACKED;
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static struct Fileheader fh;
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static unsigned char* bmp;
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static struct RGBQUAD palette[2]; /* two colors only */
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static unsigned int bitmap_width, bitmap_height;
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static unsigned char *bitmap;
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#ifdef STANDALONE
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static id_str[256];
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static bool compress = false;
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static bool assembly = false;
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static unsigned char* converted_bmp;
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static unsigned char* compressed_bmp;
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static unsigned int width;
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static unsigned int converted_size;
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static unsigned int compressed_size;
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static unsigned int rounded_width;
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#endif
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#define readshort(x) (((x&0xff00)>>8)|((x&0x00ff)<<8))
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#define readlong(x) (((x&0xff000000)>>24)| \
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((x&0x00ff0000)>>8) | \
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((x&0x0000ff00)<<8) | \
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((x&0x000000ff)<<24))
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/*********************************************************************
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* read_bmp_file()
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*
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* Reads a monochrome BMP file and puts the data in a 1-pixel-per-byte
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* array. Returns 0 on success.
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*
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**********************************************/
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int read_bmp_file(char* filename,
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int *get_width, /* in pixels */
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int *get_height, /* in pixels */
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char *bitmap)
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{
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long PaddedWidth;
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int background;
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int fd = open(filename, O_RDONLY);
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long size;
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unsigned int row, col, byte, bit;
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int l;
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char *bmp;
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int width;
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int height;
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if(fd == -1)
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{
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debugf("error - can't open '%s'\n", filename);
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return 1;
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}
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else
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{
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if(read(fd, &fh, sizeof(struct Fileheader)) !=
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sizeof(struct Fileheader))
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{
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debugf("error - can't Read Fileheader Stucture\n");
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return 2;
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}
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/* Exit if not monochrome */
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if(readshort(fh.BitCount) > 8)
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{
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debugf("error - Bitmap must be less than 8, got %d\n",
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readshort(fh.BitCount));
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return 2;
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}
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/* Exit if too wide */
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if(readlong(fh.Width) > 112)
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{
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debugf("error - Bitmap is too wide (%d pixels, max is 112)\n",
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readlong(fh.Width));
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return 3;
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}
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debugf("Bitmap is %d pixels wide\n", readlong(fh.Width));
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/* Exit if too high */
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if(readlong(fh.Height) > 64)
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{
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debugf("error - Bitmap is too high (%d pixels, max is 64)\n",
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readlong(fh.Height));
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return 4;
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}
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debugf("Bitmap is %d pixels heigh\n", readlong(fh.Height));
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for(l=0;l < 2;l++)
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{
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if(read(fd, &palette[l],sizeof(struct RGBQUAD)) !=
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sizeof(struct RGBQUAD))
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{
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debugf("error - Can't read bitmap's color palette\n");
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return 5;
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}
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}
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/* pass the other palettes */
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lseek(fd, 254*sizeof(struct RGBQUAD), SEEK_CUR);
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/* Try to guess the foreground and background colors.
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We assume that the foreground color is the darkest. */
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if(((int)palette[0].rgbRed +
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(int)palette[0].rgbGreen +
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(int)palette[0].rgbBlue) >
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((int)palette[1].rgbRed +
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(int)palette[1].rgbGreen +
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(int)palette[1].rgbBlue))
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{
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background = 0;
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}
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else
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{
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background = 1;
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}
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width = readlong(fh.Width)*readshort(fh.BitCount);
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PaddedWidth = ((width+31)&(~0x1f))/8;
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size = PaddedWidth*readlong(fh.Height);
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bmp = (unsigned char *)malloc(size);
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if(bmp == NULL)
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{
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debugf("error - Out of memory\n");
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return 6;
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}
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else
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{
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if(read(fd, (unsigned char*)bmp,(long)size) != size) {
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debugf("error - Can't read image\n");
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return 7;
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}
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}
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bitmap_height = readlong(fh.Height);
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bitmap_width = readlong(fh.Width);
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*get_width = bitmap_width;
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*get_height = bitmap_height;
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#if 0
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/* Now convert the bitmap into an array with 1 byte per pixel,
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exactly the size of the image */
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for(row = 0;row < bitmap_height;row++) {
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bit = 7;
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byte = 0;
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for(col = 0;col < bitmap_width;col++) {
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if((bmp[(bitmap_height - row - 1) * PaddedWidth + byte] &
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(1 << bit))) {
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bitmap[ (row/8) * bitmap_width + col ] |= 1<<(row&7);
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}
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else {
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bitmap[ (row/8) * bitmap_width + col ] &= ~ 1<<(row&7);
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}
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if(bit) {
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bit--;
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}
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else {
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bit = 7;
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byte++;
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}
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}
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}
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#else
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/* Now convert the bitmap into an array with 1 byte per pixel,
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exactly the size of the image */
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for(row = 0;row < bitmap_height;row++) {
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for(col = 0;col < bitmap_width;col++) {
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if(bmp[(bitmap_height - row) * PaddedWidth]) {
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bitmap[ (row/8) * bitmap_width + col ] |= 1<<(row&7);
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}
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else {
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bitmap[ (row/8) * bitmap_width + col ] &= ~ 1<<(row&7);
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}
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}
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}
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#endif
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}
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return 0; /* success */
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}
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#ifdef STANDALONE
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/*********************************************************************
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** read_next_converted_byte()
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**
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** Reads the next 6-pixel chunk from the 1-byte-per-pixel array,
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** padding the last byte with zeros if the size is not divisible by 6.
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**********************************************/
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unsigned char read_next_converted_byte(void)
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{
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unsigned char dest;
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unsigned int i;
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static unsigned int row = 0, col = 0;
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dest = 0;
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for(i = 0;i < 6 && col < bitmap_width;i++,col++)
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{
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if(bitmap[row * bitmap_width + col])
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{
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dest |= (unsigned char)(1 << (5-i));
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}
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}
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if(col >= bitmap_width)
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{
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col = 0;
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row++;
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}
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return dest;
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}
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/*********************************************************************
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** convert_image()
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**
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** Converts the 1-byte-per-pixel array into a 6-pixel-per-byte array,
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** i.e the BMP_FORMAT_VANILLA format.
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**********************************************/
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void convert_image(void)
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{
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int newsize;
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unsigned int row, col;
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rounded_width = fh.Width/6 + ((fh.Width%6)?1:0);
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newsize = rounded_width * fh.Height;
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converted_bmp = (unsigned char *)malloc(newsize);
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for(row = 0;row < fh.Height;row++)
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{
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for(col = 0;col < rounded_width;col++)
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{
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converted_bmp[row * rounded_width + col] = read_next_converted_byte();
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}
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}
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converted_size = rounded_width * fh.Height;
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}
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#define COMPRESSED_ZEROS_AHEAD 0x40
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#define COMPRESSED_ONES_AHEAD 0x80
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/*********************************************************************
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** compress_image()
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**
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** Compresses the BMP_FORMAT_VANILLA format with a simple RLE
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** algorithm. The output is in the BMP_FORMAT_RLE format.
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**********************************************/
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void compress_image(void)
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{
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unsigned int i, j, count;
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unsigned int index = 0;
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unsigned char val;
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compressed_bmp = (unsigned char *)malloc(converted_size);
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for(i = 0;i < converted_size;i++)
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{
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val = converted_bmp[i];
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if(val == 0|| val == 0x3f)
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{
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count = 0;
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while(count < 0x4000 && (i + count) < converted_size &&
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converted_bmp[i+count] == val)
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{
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count++;
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}
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if(count > 2)
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{
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compressed_bmp[index++] = (unsigned char)
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(((val == 0)?COMPRESSED_ZEROS_AHEAD:COMPRESSED_ONES_AHEAD) |
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(count >> 8));
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compressed_bmp[index++] = (unsigned char)(count & 0xff);
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}
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else
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{
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for(j = 0;j < count;j++)
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{
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compressed_bmp[index++] = val;
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}
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}
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i += count - 1;
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}
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else
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{
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compressed_bmp[index++] = val;
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}
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}
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compressed_size = index;
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}
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/*********************************************************************
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** generate_c_source()
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**
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** Outputs a C source code with the converted/compressed bitmap in
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** an array, accompanied by some #define's
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**********************************************/
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void generate_c_source(char *id, BOOL compressed)
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{
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FILE *f;
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unsigned int i;
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unsigned int size;
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unsigned char *bmp;
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size = compressed?compressed_size:converted_size;
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bmp = compressed?compressed_bmp:converted_bmp;
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f = stdout;
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fprintf(f, "#define %s_WIDTH %d\n", id, rounded_width * 6);
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fprintf(f, "#define %s_HEIGHT %d\n", id, fh.Height);
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fprintf(f, "#define %s_SIZE %d\n", id, size + 6);
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if(compressed)
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{
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fprintf(f, "#define %s_ORIGINAL_SIZE %d\n", id, converted_size);
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}
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fprintf(f, "#define %s_FORMAT %s\n", id,
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compressed?"BMP_FORMAT_RLE":"BMP_FORMAT_VANILLA");
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fprintf(f, "\nconst unsigned char bmpdata_%s[] = {", id);
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/* Header */
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fprintf(f, "\n %s, 0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,",
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compressed?"BMP_FORMAT_RLE":"BMP_FORMAT_VANILLA",
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size >> 8, size & 0xff, 2, fh.Height, rounded_width * 6);
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for(i = 0;i < size;i++)
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{
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if(i % 10 == 0)
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{
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fprintf(f, "\n ");
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}
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fprintf(f, "0x%02x,", bmp[i]);
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}
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fprintf(f, "\n};");
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}
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/*********************************************************************
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** generate_asm_source()
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**
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** Outputs an ASM source code with the converted/compressed bitmap in
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** an array, the first 2 bytes describing the X and Y size
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**********************************************/
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void generate_asm_source(char *id, BOOL compressed)
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{
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FILE *f;
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unsigned int i;
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unsigned int size;
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unsigned char *bmp;
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size = compressed?compressed_size:converted_size;
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bmp = compressed?compressed_bmp:converted_bmp;
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f = stdout;
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fprintf(f, "bmpdata_%s:\n", id);
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/* Header */
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fprintf(f, "\n db %s, %.2xh,%.2xh,%.2xh,%.2xh,%.2xh,",
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compressed?"1":"0",
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size >> 8, size & 0xff, 2, fh.Height, rounded_width * 6);
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for(i = 0;i < size;i++)
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{
|
||||
if(i % 10 == 0)
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{
|
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fprintf(f, "\n db ");
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}
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fprintf(f, "%.2xh,", bmp[i]);
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}
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fprintf(f, "\n");
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}
|
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|
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void print_usage(void)
|
||||
{
|
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printf("bmp2mt - Converts BMP files to MT Pro source code format\n");
|
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printf("build date: " __DATE__ "\n\n");
|
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printf("Usage: %s [-i <id>] [-c] [-a] <bitmap file>\n"
|
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"-i <id> Bitmap ID (default is filename without extension)\n"
|
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"-c Compress (BMP_FORMAT_RLE)\n"
|
||||
"-f Frexx Format!!!\n"
|
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"-a Assembly format source code\n", APPLICATION_NAME);
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}
|
||||
|
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#pragma argsused
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
char *bmp_filename = NULL;
|
||||
char *id = NULL;
|
||||
char errstr[80];
|
||||
int i;
|
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|
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for(i = 1;i < argc;i++)
|
||||
{
|
||||
if(argv[i][0] == '-')
|
||||
{
|
||||
switch(argv[i][1])
|
||||
{
|
||||
case 'i': /* ID */
|
||||
if(argv[i][2])
|
||||
{
|
||||
id = &argv[i][2];
|
||||
}
|
||||
else if(argc > i+1)
|
||||
{
|
||||
id = argv[i+1];
|
||||
i++;
|
||||
}
|
||||
else
|
||||
{
|
||||
print_usage();
|
||||
exit(1);
|
||||
}
|
||||
break;
|
||||
|
||||
case 'c': /* Compressed */
|
||||
compress = true;
|
||||
break;
|
||||
|
||||
case 'a': /* Assembly */
|
||||
assembly = true;
|
||||
break;
|
||||
|
||||
default:
|
||||
print_usage();
|
||||
exit(1);
|
||||
break;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
if(!bmp_filename)
|
||||
{
|
||||
bmp_filename = argv[i];
|
||||
}
|
||||
else
|
||||
{
|
||||
print_usage();
|
||||
exit(1);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if(!bmp_filename)
|
||||
{
|
||||
print_usage();
|
||||
exit(1);
|
||||
}
|
||||
|
||||
if(!id)
|
||||
{
|
||||
id = strdup(bmp_filename);
|
||||
|
||||
for(i = 0;id[i];i++)
|
||||
{
|
||||
if(id[i] == ' ')
|
||||
{
|
||||
id[i] = '_';
|
||||
}
|
||||
else if(id[i] == '.')
|
||||
{
|
||||
id[i] = '\0';
|
||||
break;
|
||||
}
|
||||
else
|
||||
{
|
||||
id[i] = (char)toupper(id[i]);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
read_bmp_file(bmp_filename);
|
||||
convert_image();
|
||||
if(fh.Width % 6)
|
||||
{
|
||||
|
||||
sprintf(errstr, "warning - width is not divisible by 6 (%d), "
|
||||
"padding with zeros to %d\n", fh.Width, rounded_width*6);
|
||||
print_error(errstr, 0);
|
||||
}
|
||||
|
||||
if(compress)
|
||||
{
|
||||
compress_image();
|
||||
}
|
||||
|
||||
if(assembly)
|
||||
{
|
||||
generate_asm_source(id, compress);
|
||||
}
|
||||
else
|
||||
{
|
||||
generate_c_source(id, compress);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
#endif
|
||||
Loading…
Add table
Add a link
Reference in a new issue