Color BMP support

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8472 a1c6a512-1295-4272-9138-f99709370657

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. */
 }