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author | Linus Nielsen Feltzing <linus@haxx.se> | 2006-01-28 12:12:42 +0000 |
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committer | Linus Nielsen Feltzing <linus@haxx.se> | 2006-01-28 12:12:42 +0000 |
commit | 745adad22a3803e7d7f3c14ba7ae2f8d3accb75a (patch) | |
tree | 644ae59e3b53daf9b534893763d2d0d7610f91fa /apps/recorder/bmp.c | |
parent | 9bd06032a37c60b17ae1643677ddc9a56a46d67f (diff) | |
download | rockbox-745adad22a3803e7d7f3c14ba7ae2f8d3accb75a.tar.gz rockbox-745adad22a3803e7d7f3c14ba7ae2f8d3accb75a.zip |
Color BMP support
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8472 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'apps/recorder/bmp.c')
-rw-r--r-- | apps/recorder/bmp.c | 240 |
1 files changed, 203 insertions, 37 deletions
diff --git a/apps/recorder/bmp.c b/apps/recorder/bmp.c index d2be8c9172..61d7430bb6 100644 --- a/apps/recorder/bmp.c +++ b/apps/recorder/bmp.c @@ -26,11 +26,13 @@ #include <stdio.h> #include <stdlib.h> - +#include <string.h> #include "debug.h" #include "lcd.h" #include "file.h" -#include "autoconf.h" +#include "config.h" +#include "bmp.h" +#include "lcd.h" #ifdef __GNUC__ #define STRUCT_PACKED __attribute__((packed)) @@ -59,6 +61,12 @@ struct Fileheader { unsigned long ClrImportant; /* important color count */ } STRUCT_PACKED; +struct rgb_quad { /* Little endian */ + unsigned char blue; + unsigned char green; + unsigned char red; + unsigned char reserved; +} STRUCT_PACKED; #ifdef ROCKBOX_LITTLE_ENDIAN #define readshort(x) *(x) @@ -79,6 +87,19 @@ static long readlong(long *value) { #endif +unsigned char brightness(struct rgb_quad color) +{ + return (3 * (unsigned int)color.red + 6 * (unsigned int)color.green + + (unsigned int)color.blue) / 10; +} + +/* Function to get a pixel from a line. (Tomas: maybe a better way?) */ +inline int getpix(int px, unsigned char *bmpbuf) { + int a = (px / 8); + int b = (7 - (px % 8)); + + return (bmpbuf[a] & (1 << b)) != 0; +} /****************************************************************************** @@ -88,16 +109,26 @@ static long readlong(long *value) { * *****************************************************************************/ int read_bmp_file(char* filename, - int *get_width, /* in pixels */ - int *get_height, /* in pixels */ - char *bitmap, - int maxsize) /* Maximum amount of bytes to write to bitmap */ + struct bitmap *bm, + int maxsize, + int format) { struct Fileheader fh; - int bitmap_width, bitmap_height, PaddedWidth, PaddedHeight; + int width, height, PaddedWidth, PaddedHeight; int fd, row, col, ret; - char bmpbuf[(LCD_WIDTH / 8 + 3) & ~3]; /* Buffer for one line */ + struct rgb_quad palette[256]; + int invert_pixel = 0; + int numcolors; + int depth; + int totalsize; + char *bitmap = bm->data; + + unsigned char bmpbuf[LCD_WIDTH*sizeof(struct rgb_quad)]; /* Buffer for one line */ +#if LCD_DEPTH == 1 + (void)format; +#endif + fd = open(filename, O_RDONLY); /* Exit if file opening failed */ @@ -119,14 +150,6 @@ int read_bmp_file(char* filename, return -3; } - /* Exit if not monochrome */ - if (readshort(&fh.BitCount) != 1) { - DEBUGF("error - Bitmap must be in 1 bit per pixel format. " - "This one is: %d\n", readshort(&fh.BitCount)); - close(fd); - return -4; - } - /* Exit if too wide */ if (readlong(&fh.Width) > LCD_WIDTH) { DEBUGF("error - Bitmap is too wide (%d pixels, max is %d)\n", @@ -144,28 +167,80 @@ int read_bmp_file(char* filename, } /* Calculate image size */ - bitmap_height = readlong(&fh.Height); - bitmap_width = readlong(&fh.Width); - /* Paddedwidth is for BMP files. */ - PaddedWidth = ((bitmap_width + 31) & (~0x1f)) / 8; + height = readlong(&fh.Height); + width = readlong(&fh.Width); + depth = readshort(&fh.BitCount); + + /* 4-byte boundary aligned */ + PaddedWidth = (width * depth / 8 + 3) & ~3; + +#if LCD_DEPTH > 1 + if(format == FORMAT_ANY) { + if(depth == 1) + format = FORMAT_MONO; + else + format = FORMAT_NATIVE; + } +#endif + /* PaddedHeight is for rockbox format. */ - PaddedHeight = (bitmap_height + 7) / 8; + if(format == FORMAT_MONO) { + PaddedHeight = (height + 7) / 8; + totalsize = PaddedHeight * width; + } else { +#if LCD_DEPTH == 2 + PaddedHeight = height/4; +#else + PaddedHeight = height; +#endif + totalsize = PaddedHeight * width * sizeof(fb_data); + } /* Check if this fits the buffer */ - if ((PaddedHeight * bitmap_width) > maxsize) { + + if (totalsize > maxsize) { DEBUGF("error - Bitmap is too large to fit the supplied buffer: " - "%d bytes.\n", (PaddedHeight * bitmap_width)); + "%d bytes.\n", (PaddedHeight * width)); close(fd); return -7; } + if (depth <= 8) + { + numcolors = readlong(&fh.ClrUsed); + if (numcolors == 0) + numcolors = 1 << depth; + + if(read(fd, palette, numcolors * sizeof(struct rgb_quad)) + != numcolors * (int)sizeof(struct rgb_quad)) + { + DEBUGF("error - Can't read bitmap's color palette\n"); + close(fd); + return -8; + } + } + + /* Use the darker palette color as foreground on mono bitmaps */ + if(readshort(&fh.BitCount) == 1) { + if(brightness(palette[0]) > brightness(palette[1])) + invert_pixel = 1; + } + /* Search to the beginning of the image data */ lseek(fd, (off_t)readlong(&fh.OffBits), SEEK_SET); +#if LCD_DEPTH == 2 + if(format == FORMAT_NATIVE) + memset(bitmap, 0, width * height / 4); +#endif + +#if LCD_DEPTH > 1 + fb_data *dest = (fb_data *)bitmap; +#endif + /* loop to read rows and put them to buffer */ - for (row = 0; row < bitmap_height; row++) { - int bitsel = 1 << ((bitmap_height - row - 1) % 8); - int bytesel = bitmap_width * ((bitmap_height - row - 1) / 8); + for (row = 0; row < height; row++) { + unsigned char *p; /* read one row */ ret = read(fd, bmpbuf, PaddedWidth); @@ -173,24 +248,115 @@ int read_bmp_file(char* filename, DEBUGF("error reading image, read returned: %d expected was: " "%d\n", ret, PaddedWidth); close(fd); - return -8; + return -9; } - /* loop though the pixels in this line. */ - for (col = 0; col < bitmap_width; col++) { - ret = (bmpbuf[col/8] & (1 << (7 - (col % 8)))) != 0; - if (ret == 1) - bitmap[bytesel + col] &= ~bitsel; - else - bitmap[bytesel + col] |= bitsel; + switch(depth) { + case 1: +#if LCD_DEPTH > 1 + if(format == FORMAT_MONO) { +#endif + /* Mono -> Mono */ + for (col = 0; col < width; col++) { + ret = getpix(col, bmpbuf) ^ invert_pixel; + if (ret == 1) { + bitmap[width * ((height - row - 1) / 8) + col] + &= ~ 1 << ((height - row - 1) % 8); + } else { + bitmap[width * ((height - row - 1) / 8) + col] + |= 1 << ((height - row - 1) % 8); + } + } +#if LCD_DEPTH == 2 + } else { + /* Mono -> 2gray (iriver H1xx) */ + for (col = 0; col < width; col++) { + ret = brightness(palette[getpix(col, bmpbuf)]); + + if (ret > 96) { + bitmap[width * ((height - row - 1) / 8) + col] + &= ~ 1 << ((height - row - 1) % 8); + } else { + bitmap[width * ((height - row - 1) / 8) + col] + |= 1 << ((height - row - 1) % 8); + } + } + } +#elif LCD_DEPTH == 16 + } else { + /* Mono -> RGB16 */ + for (col = 0; col < width; col++) { + ret = getpix(col, bmpbuf); + unsigned short rgb = (((palette[ret].red >> 3) << 11) | + ((palette[ret].green >> 2) << 5) | + ((palette[ret].blue >> 3))); + dest[width * (height - row - 1) + col] = rgb; + } + } +#endif + break; + + case 24: + p = bmpbuf; +#if LCD_DEPTH > 1 + if(format == FORMAT_MONO) { +#endif + /* RGB24 -> mono */ + for (col = 0; col < width; col++) { + struct rgb_quad rgb; + rgb.red = p[2]; + rgb.green = p[1]; + rgb.blue = p[0]; + ret = brightness(rgb); + if (ret > 96) { + bitmap[width * ((height - row - 1) / 8) + col] + &= ~ 1 << ((height - row - 1) % 8); + } else { + bitmap[width * ((height - row - 1) / 8) + col] + |= 1 << ((height - row - 1) % 8); + } + p += 3; + } +#if LCD_DEPTH == 2 + } else { + /* RGB24 -> 2gray (iriver H1xx) */ + for (col = 0; col < width; col++) { + struct rgb_quad rgb; + rgb.red = p[2]; + rgb.green = p[1]; + rgb.blue = p[0]; + ret = brightness(rgb); + + dest[((height - row - 1)/4) * width + col] |= + (~ret & 0xC0) >> (2 * (~(height - row - 1) & 3)); + p += 3; + } + } +#elif LCD_DEPTH == 16 + } else { + /* RGB24 -> RGB16 */ + for (col = 0; col < width; col++) { + unsigned short rgb = (((p[2] >> 3) << 11) | + ((p[1] >> 2) << 5) | + ((p[0] >> 3))); + dest[width * (height - row - 1) + col] = rgb; + p += 3; + } + } +#endif + break; } } close(fd); /* returning image size: */ - *get_width = bitmap_width; - *get_height = bitmap_height; + bm->width = width; + bm->height = height; +#if LCD_DEPTH > 1 + bm->format = format; +#endif - return (PaddedHeight * bitmap_width); /* return the used buffer size. */ +DEBUGF("totalsize: %d\n", totalsize); + return totalsize; /* return the used buffer size. */ } |