EmbeddedArtists AB / Mbed 2 deprecated app_lcdboard_demo_cube

Example for the LPC4088 QSB Base Board

Dependencies:   EALib mbed

bmp.cpp@3:15f457b3bdbd, 2014-04-09 (annotated)

Committer:
embeddedartists
Date:
Wed Apr 09 09:44:58 2014 +0000
Revision:
3:15f457b3bdbd
Parent:
0:a771927a62fd 
Updated to latest version of EALib

Who changed what in which revision?

UserRevisionLine numberNew contents of line
embeddedartists 0:a771927a62fd 1 /* ----------------------------------------------------------------------------
embeddedartists 0:a771927a62fd 2 * ATMEL Microcontroller Software Support - ROUSSET -
embeddedartists 0:a771927a62fd 3 * ----------------------------------------------------------------------------
embeddedartists 0:a771927a62fd 4 * Copyright (c) 2006, Atmel Corporation
embeddedartists 0:a771927a62fd 5
embeddedartists 0:a771927a62fd 6 * All rights reserved.
embeddedartists 0:a771927a62fd 7 *
embeddedartists 0:a771927a62fd 8 * Redistribution and use in source and binary forms, with or without
embeddedartists 0:a771927a62fd 9 * modification, are permitted provided that the following conditions are met:
embeddedartists 0:a771927a62fd 10 *
embeddedartists 0:a771927a62fd 11 * - Redistributions of source code must retain the above copyright notice,
embeddedartists 0:a771927a62fd 12 * this list of conditions and the disclaiimer below.
embeddedartists 0:a771927a62fd 13 *
embeddedartists 0:a771927a62fd 14 * - Redistributions in binary form must reproduce the above copyright notice,
embeddedartists 0:a771927a62fd 15 * this list of conditions and the disclaimer below in the documentation and/or
embeddedartists 0:a771927a62fd 16 * other materials provided with the distribution.
embeddedartists 0:a771927a62fd 17 *
embeddedartists 0:a771927a62fd 18 * Atmel's name may not be used to endorse or promote products derived from
embeddedartists 0:a771927a62fd 19 * this software without specific prior written permission.
embeddedartists 0:a771927a62fd 20 *
embeddedartists 0:a771927a62fd 21 * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
embeddedartists 0:a771927a62fd 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
embeddedartists 0:a771927a62fd 23 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
embeddedartists 0:a771927a62fd 24 * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
embeddedartists 0:a771927a62fd 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
embeddedartists 0:a771927a62fd 26 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
embeddedartists 0:a771927a62fd 27 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
embeddedartists 0:a771927a62fd 28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
embeddedartists 0:a771927a62fd 29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
embeddedartists 0:a771927a62fd 30 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
embeddedartists 0:a771927a62fd 31 * ----------------------------------------------------------------------------
embeddedartists 0:a771927a62fd 32 */
embeddedartists 0:a771927a62fd 33
embeddedartists 0:a771927a62fd 34 //------------------------------------------------------------------------------
embeddedartists 0:a771927a62fd 35 // Headers
embeddedartists 0:a771927a62fd 36 //------------------------------------------------------------------------------
embeddedartists 0:a771927a62fd 37
embeddedartists 0:a771927a62fd 38 #include "mbed.h"
embeddedartists 0:a771927a62fd 39 #include "bmp.h"
embeddedartists 0:a771927a62fd 40
embeddedartists 0:a771927a62fd 41 //------------------------------------------------------------------------------
embeddedartists 0:a771927a62fd 42 // Internal constants
embeddedartists 0:a771927a62fd 43 //------------------------------------------------------------------------------
embeddedartists 0:a771927a62fd 44
embeddedartists 0:a771927a62fd 45 /// BMP magic number ('BM').
embeddedartists 0:a771927a62fd 46 #define BMP_TYPE 0x4D42
embeddedartists 0:a771927a62fd 47
embeddedartists 0:a771927a62fd 48 //------------------------------------------------------------------------------
embeddedartists 0:a771927a62fd 49 // Internal types
embeddedartists 0:a771927a62fd 50 //------------------------------------------------------------------------------
embeddedartists 0:a771927a62fd 51
embeddedartists 0:a771927a62fd 52 struct BMPPaletteEntry {
embeddedartists 0:a771927a62fd 53
embeddedartists 0:a771927a62fd 54 unsigned char b;
embeddedartists 0:a771927a62fd 55 unsigned char g;
embeddedartists 0:a771927a62fd 56 unsigned char r;
embeddedartists 0:a771927a62fd 57 unsigned char filler;
embeddedartists 0:a771927a62fd 58 };
embeddedartists 0:a771927a62fd 59
embeddedartists 0:a771927a62fd 60 //------------------------------------------------------------------------------
embeddedartists 0:a771927a62fd 61 // Exported functions
embeddedartists 0:a771927a62fd 62 //------------------------------------------------------------------------------
embeddedartists 0:a771927a62fd 63
embeddedartists 0:a771927a62fd 64 //------------------------------------------------------------------------------
embeddedartists 0:a771927a62fd 65 /// Returns 1 if the header of a BMP file is valid; otherwise returns 0.
embeddedartists 0:a771927a62fd 66 /// \param file Buffer holding the file to examinate.
embeddedartists 0:a771927a62fd 67 //------------------------------------------------------------------------------
embeddedartists 0:a771927a62fd 68 unsigned char BMP_IsValid(void *file)
embeddedartists 0:a771927a62fd 69 {
embeddedartists 0:a771927a62fd 70 return ((struct BMPHeader *) file)->type == BMP_TYPE;
embeddedartists 0:a771927a62fd 71 }
embeddedartists 0:a771927a62fd 72
embeddedartists 0:a771927a62fd 73 //------------------------------------------------------------------------------
embeddedartists 0:a771927a62fd 74 /// Returns the size of a BMP image given at least its header (the file does
embeddedartists 0:a771927a62fd 75 /// not have to be complete).
embeddedartists 0:a771927a62fd 76 /// \param file Pointer to the buffer which holds the BMP file.
embeddedartists 0:a771927a62fd 77 //------------------------------------------------------------------------------
embeddedartists 0:a771927a62fd 78 unsigned int BMP_GetFileSize(void *file)
embeddedartists 0:a771927a62fd 79 {
embeddedartists 0:a771927a62fd 80 return ((struct BMPHeader *) file)->fileSize;
embeddedartists 0:a771927a62fd 81 }
embeddedartists 0:a771927a62fd 82
embeddedartists 0:a771927a62fd 83 //------------------------------------------------------------------------------
embeddedartists 0:a771927a62fd 84 /// Loads a BMP image located at the given address, decodes it and stores the
embeddedartists 0:a771927a62fd 85 /// resulting image inside the provided buffer. Image must have the specified
embeddedartists 0:a771927a62fd 86 /// width & height.
embeddedartists 0:a771927a62fd 87 /// Returns 0 if the image has been loaded; otherwise returns an error code.
embeddedartists 0:a771927a62fd 88 /// \param file Buffer which holds the BMP file.
embeddedartists 0:a771927a62fd 89 /// \param buffer Buffer in which to store the decoded image.
embeddedartists 0:a771927a62fd 90 /// \param width Buffer width in pixels.
embeddedartists 0:a771927a62fd 91 /// \param height Buffer height in pixels.
embeddedartists 0:a771927a62fd 92 /// \param bpp Number of bits per pixels that the buffer stores.
embeddedartists 0:a771927a62fd 93 //------------------------------------------------------------------------------
embeddedartists 0:a771927a62fd 94 unsigned char BMP_Decode(
embeddedartists 0:a771927a62fd 95 void *file,
embeddedartists 0:a771927a62fd 96 unsigned char *buffer,
embeddedartists 0:a771927a62fd 97 unsigned int width,
embeddedartists 0:a771927a62fd 98 unsigned int height,
embeddedartists 0:a771927a62fd 99 unsigned char bpp)
embeddedartists 0:a771927a62fd 100 {
embeddedartists 0:a771927a62fd 101 struct BMPHeader *header;
embeddedartists 0:a771927a62fd 102 unsigned int i, j;
embeddedartists 0:a771927a62fd 103 unsigned char r, g, b;
embeddedartists 0:a771927a62fd 104 unsigned char *image;
embeddedartists 0:a771927a62fd 105
embeddedartists 0:a771927a62fd 106 // Read header information
embeddedartists 0:a771927a62fd 107 header = (struct BMPHeader *) file;
embeddedartists 0:a771927a62fd 108
embeddedartists 0:a771927a62fd 109 // Verify that the file is valid
embeddedartists 0:a771927a62fd 110 if (!BMP_IsValid(file)) {
embeddedartists 0:a771927a62fd 111
embeddedartists 0:a771927a62fd 112 printf("BMP_Decode: File type is not 'BM' (0x%x).\n\r",
embeddedartists 0:a771927a62fd 113 header->type);
embeddedartists 0:a771927a62fd 114 return 1;
embeddedartists 0:a771927a62fd 115 }
embeddedartists 0:a771927a62fd 116
embeddedartists 0:a771927a62fd 117 // Check that parameters match
embeddedartists 0:a771927a62fd 118 if ((header->compression != 0)
embeddedartists 0:a771927a62fd 119 || (header->width != width)
embeddedartists 0:a771927a62fd 120 || (header->height != height)) {
embeddedartists 0:a771927a62fd 121
embeddedartists 0:a771927a62fd 122 printf("BMP_Decode: File format not supported\n\r");
embeddedartists 0:a771927a62fd 123 printf(" -> .compression = %d\n\r", header->compression);
embeddedartists 0:a771927a62fd 124 printf(" -> .width = %d\n\r", header->width);
embeddedartists 0:a771927a62fd 125 printf(" -> .height = %d\n\r", header->height);
embeddedartists 0:a771927a62fd 126 printf(" -> .bits = %d\n\r", header->bits);
embeddedartists 0:a771927a62fd 127 return 2;
embeddedartists 0:a771927a62fd 128 }
embeddedartists 0:a771927a62fd 129
embeddedartists 0:a771927a62fd 130 // Get image data
embeddedartists 0:a771927a62fd 131 image = (unsigned char *) ((unsigned int) file + header->offset);
embeddedartists 0:a771927a62fd 132
embeddedartists 0:a771927a62fd 133 // Check that the bpp resolution is supported
embeddedartists 0:a771927a62fd 134 // Only a 24-bit output & 24- or 8-bit input are supported
embeddedartists 0:a771927a62fd 135 if (bpp != 24) {
embeddedartists 0:a771927a62fd 136
embeddedartists 0:a771927a62fd 137 printf("BMP_Decode: Output resolution not supported\n\r");
embeddedartists 0:a771927a62fd 138 return 3;
embeddedartists 0:a771927a62fd 139 }
embeddedartists 0:a771927a62fd 140 else if (header->bits == 24) {
embeddedartists 0:a771927a62fd 141
embeddedartists 0:a771927a62fd 142 // Modified by Embedded Artists. This padding was not handled in the original
embeddedartists 0:a771927a62fd 143 // implementation. Each row in the Pixel Array is padded to a multiple of 4 bytes in size
embeddedartists 0:a771927a62fd 144 int rowWidthBytes = width * 3;
embeddedartists 0:a771927a62fd 145 rowWidthBytes += (rowWidthBytes % 4);
embeddedartists 0:a771927a62fd 146
embeddedartists 0:a771927a62fd 147 // Copy raw data from BMP to buffer (reversing row order)
embeddedartists 0:a771927a62fd 148 for (i=0; i < height; i++) {
embeddedartists 0:a771927a62fd 149 #if 1
embeddedartists 0:a771927a62fd 150 // Modified by Embedded Artists to convert to 565-format instead of 24 bit
embeddedartists 0:a771927a62fd 151 int x;
embeddedartists 0:a771927a62fd 152 for(x=0; x<width; x++)
embeddedartists 0:a771927a62fd 153 {
embeddedartists 0:a771927a62fd 154 r = *(unsigned char *)(image + (height - i - 1) * rowWidthBytes + 3*x + 2);
embeddedartists 0:a771927a62fd 155 g = *(unsigned char *)(image + (height - i - 1) * rowWidthBytes + 3*x + 1);
embeddedartists 0:a771927a62fd 156 b = *(unsigned char *)(image + (height - i - 1) * rowWidthBytes + 3*x + 0);
embeddedartists 0:a771927a62fd 157 *(unsigned short *)(buffer + (i * width) * 2 + 2*x) = (((unsigned short)r & 0xF8) << 8) |
embeddedartists 0:a771927a62fd 158 (((unsigned short)g & 0xFC) << 3) |
embeddedartists 0:a771927a62fd 159 (((unsigned short)b & 0xF8) >> 3);
embeddedartists 0:a771927a62fd 160 }
embeddedartists 0:a771927a62fd 161 #else
embeddedartists 0:a771927a62fd 162 memcpy(buffer + (i * width) * 3,
embeddedartists 0:a771927a62fd 163 image + ((height - i - 1) * width) * 3,
embeddedartists 0:a771927a62fd 164 width * 3);
embeddedartists 0:a771927a62fd 165 #endif
embeddedartists 0:a771927a62fd 166 }
embeddedartists 0:a771927a62fd 167
embeddedartists 0:a771927a62fd 168 #if 0
embeddedartists 0:a771927a62fd 169 // Swap red and blue
embeddedartists 0:a771927a62fd 170 for (i=0; i < height; i++) {
embeddedartists 0:a771927a62fd 171 for (j=0; j < width; j++) {
embeddedartists 0:a771927a62fd 172
embeddedartists 0:a771927a62fd 173 r = buffer[(i * width + j) * 3 + 2];
embeddedartists 0:a771927a62fd 174 g = buffer[(i * width + j) * 3 + 1];
embeddedartists 0:a771927a62fd 175 b = buffer[(i * width + j) * 3];
embeddedartists 0:a771927a62fd 176
embeddedartists 0:a771927a62fd 177 buffer[(i * width + j) * 3] = r;
embeddedartists 0:a771927a62fd 178 buffer[(i * width + j) * 3 + 1] = g;
embeddedartists 0:a771927a62fd 179 buffer[(i * width + j) * 3 + 2] = b;
embeddedartists 0:a771927a62fd 180 }
embeddedartists 0:a771927a62fd 181 }
embeddedartists 0:a771927a62fd 182 #endif
embeddedartists 0:a771927a62fd 183 }
embeddedartists 0:a771927a62fd 184 else if (header->bits == 8) {
embeddedartists 0:a771927a62fd 185
embeddedartists 0:a771927a62fd 186 // Retrieve palette
embeddedartists 0:a771927a62fd 187 struct BMPPaletteEntry palette[256];
embeddedartists 0:a771927a62fd 188 memcpy(palette,
embeddedartists 0:a771927a62fd 189 (unsigned char *) ((unsigned int) file + sizeof(struct BMPHeader)),
embeddedartists 0:a771927a62fd 190 header->offset - sizeof(struct BMPHeader));
embeddedartists 0:a771927a62fd 191
embeddedartists 0:a771927a62fd 192 // Decode image (reversing row order)
embeddedartists 0:a771927a62fd 193 for (i=0; i < height; i++) {
embeddedartists 0:a771927a62fd 194 for (j=0; j < width; j++) {
embeddedartists 0:a771927a62fd 195
embeddedartists 0:a771927a62fd 196 r = palette[image[(height - i - 1) * width + j]].r;
embeddedartists 0:a771927a62fd 197 g = palette[image[(height - i - 1) * width + j]].g;
embeddedartists 0:a771927a62fd 198 b = palette[image[(height - i - 1) * width + j]].b;
embeddedartists 0:a771927a62fd 199
embeddedartists 0:a771927a62fd 200 buffer[(i * width + j) * 3] = r;
embeddedartists 0:a771927a62fd 201 buffer[(i * width + j) * 3 + 1] = g;
embeddedartists 0:a771927a62fd 202 buffer[(i * width + j) * 3 + 2] = b;
embeddedartists 0:a771927a62fd 203 }
embeddedartists 0:a771927a62fd 204 }
embeddedartists 0:a771927a62fd 205 }
embeddedartists 0:a771927a62fd 206 else {
embeddedartists 0:a771927a62fd 207
embeddedartists 0:a771927a62fd 208 printf("BMP_Decode: Input resolution not supported\n\r");
embeddedartists 0:a771927a62fd 209 return 4;
embeddedartists 0:a771927a62fd 210 }
embeddedartists 0:a771927a62fd 211
embeddedartists 0:a771927a62fd 212 return 0;
embeddedartists 0:a771927a62fd 213 }
embeddedartists 0:a771927a62fd 214