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Bitmap.cpp@2:6d2a681c5cdf, 2012-04-18 (annotated)

Committer:
stvnrhodes
Date:
Wed Apr 18 22:32:47 2012 +0000
Revision:
2:6d2a681c5cdf
Child:
3:328a79795feb
Still for Adam

Who changed what in which revision?

UserRevisionLine numberNew contents of line
stvnrhodes 2:6d2a681c5cdf 1 #include "Bitmap.h"
stvnrhodes 2:6d2a681c5cdf 2
stvnrhodes 2:6d2a681c5cdf 3 #define OFFSET_LOCATION 0x0a
stvnrhodes 2:6d2a681c5cdf 4 #define WIDTH_LOCATION 0x12
stvnrhodes 2:6d2a681c5cdf 5 #define HEIGHT_LOCATION 0x16
stvnrhodes 2:6d2a681c5cdf 6
stvnrhodes 2:6d2a681c5cdf 7 bool Bitmap::isPixel(int pixel) {
stvnrhodes 2:6d2a681c5cdf 8 if (pixel > width) { return false; }
stvnrhodes 2:6d2a681c5cdf 9 if ((row_data[pixel/32]>>(pixel%32)) & 0x01) { return true; }
stvnrhodes 2:6d2a681c5cdf 10 else { return false; }
stvnrhodes 2:6d2a681c5cdf 11 }
stvnrhodes 2:6d2a681c5cdf 12
stvnrhodes 2:6d2a681c5cdf 13 Bitmap::Bitmap () {
stvnrhodes 2:6d2a681c5cdf 14 loaded = false;
stvnrhodes 2:6d2a681c5cdf 15 fp = NULL;
stvnrhodes 2:6d2a681c5cdf 16 row_data = NULL;
stvnrhodes 2:6d2a681c5cdf 17 }
stvnrhodes 2:6d2a681c5cdf 18
stvnrhodes 2:6d2a681c5cdf 19 bool Bitmap::openImg(char* filename) {
stvnrhodes 2:6d2a681c5cdf 20 if (fp != NULL) {
stvnrhodes 2:6d2a681c5cdf 21 fclose(fp);
stvnrhodes 2:6d2a681c5cdf 22 free(row_data);
stvnrhodes 2:6d2a681c5cdf 23 }
stvnrhodes 2:6d2a681c5cdf 24 printf("Opening\n\r");
stvnrhodes 2:6d2a681c5cdf 25 fp = fopen(filename, "rb");
stvnrhodes 2:6d2a681c5cdf 26 loaded = true;
stvnrhodes 2:6d2a681c5cdf 27 printf("Opened\n\r");
stvnrhodes 2:6d2a681c5cdf 28 fseek(fp, OFFSET_LOCATION, SEEK_SET);
stvnrhodes 2:6d2a681c5cdf 29 fread((char *) &offset, 1, 4, fp);
stvnrhodes 2:6d2a681c5cdf 30 fseek(fp, WIDTH_LOCATION, SEEK_SET);
stvnrhodes 2:6d2a681c5cdf 31 fread((char *) &width, 1, 4, fp);
stvnrhodes 2:6d2a681c5cdf 32 fread(&height, sizeof(long), 1, fp);
stvnrhodes 2:6d2a681c5cdf 33 fseek(fp, HEIGHT_LOCATION, SEEK_SET);
stvnrhodes 2:6d2a681c5cdf 34 printf("%x,%x,%x\n\r", offset, width, height);
stvnrhodes 2:6d2a681c5cdf 35 row_size = (width % 32) ? (width / 32) + 1 : width / 32;
stvnrhodes 2:6d2a681c5cdf 36 row_data = (long *) malloc(row_size * sizeof(long));
stvnrhodes 2:6d2a681c5cdf 37 return true;
stvnrhodes 2:6d2a681c5cdf 38 }
stvnrhodes 2:6d2a681c5cdf 39
stvnrhodes 2:6d2a681c5cdf 40 bool Bitmap::setRow(int row) {
stvnrhodes 2:6d2a681c5cdf 41 if (loaded) {
stvnrhodes 2:6d2a681c5cdf 42 row_num = row;
stvnrhodes 2:6d2a681c5cdf 43 fseek(fp, offset + row * row_size, SEEK_SET);
stvnrhodes 2:6d2a681c5cdf 44 for (int i = 0; i < row_size; i++) {
stvnrhodes 2:6d2a681c5cdf 45 fscanf(fp,"%4ld", row_data + i);
stvnrhodes 2:6d2a681c5cdf 46 printf("%4ld\n\r", row_data[i]);
stvnrhodes 2:6d2a681c5cdf 47 }
stvnrhodes 2:6d2a681c5cdf 48 return true;
stvnrhodes 2:6d2a681c5cdf 49 } else {
stvnrhodes 2:6d2a681c5cdf 50 return false;
stvnrhodes 2:6d2a681c5cdf 51 }
stvnrhodes 2:6d2a681c5cdf 52 }
stvnrhodes 2:6d2a681c5cdf 53
stvnrhodes 2:6d2a681c5cdf 54 bool Bitmap::closeImg(void) {
stvnrhodes 2:6d2a681c5cdf 55 fclose(fp);
stvnrhodes 2:6d2a681c5cdf 56 free(row_data);
stvnrhodes 2:6d2a681c5cdf 57 return true;
stvnrhodes 2:6d2a681c5cdf 58 }
stvnrhodes 2:6d2a681c5cdf 59
stvnrhodes 2:6d2a681c5cdf 60 int Bitmap::getHeight() {
stvnrhodes 2:6d2a681c5cdf 61 return height;
stvnrhodes 2:6d2a681c5cdf 62 }
stvnrhodes 2:6d2a681c5cdf 63
stvnrhodes 2:6d2a681c5cdf 64 int Bitmap::getWidth() {
stvnrhodes 2:6d2a681c5cdf 65 return width;
stvnrhodes 2:6d2a681c5cdf 66 }
stvnrhodes 2:6d2a681c5cdf 67