Adam Resnick
/
StepperMotors
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Bitmap.cpp@1:cf60b60a1b5b, 2012-05-04 (annotated)
- Committer:
- stretch
- Date:
- Fri May 04 06:25:41 2012 +0000
- Revision:
- 1:cf60b60a1b5b
- Parent:
- 0:3058939fa37c
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| stretch | 0:3058939fa37c | 1 | #include "Bitmap.h" |
| stretch | 0:3058939fa37c | 2 | #define OFFSET_LOCATION 0x0a |
| stretch | 0:3058939fa37c | 3 | #define WIDTH_LOCATION 0x12 |
| stretch | 0:3058939fa37c | 4 | #define HEIGHT_LOCATION 0x16 |
| stretch | 0:3058939fa37c | 5 | |
| stretch | 0:3058939fa37c | 6 | bool Bitmap::isPixel(int pixel, bool reversed) { |
| stretch | 0:3058939fa37c | 7 | if (pixel >= width) { return false; } |
| stretch | 0:3058939fa37c | 8 | if (reversed) { pixel = width - pixel - 1; } |
| stretch | 0:3058939fa37c | 9 | if ((row_data[pixel/(8*sizeof(char))]>>(8*sizeof(char)-(pixel%(8*sizeof(char)))-1)) & 0x01) { return false; } |
| stretch | 0:3058939fa37c | 10 | else { return true; } |
| stretch | 0:3058939fa37c | 11 | } |
| stretch | 0:3058939fa37c | 12 | |
| stretch | 0:3058939fa37c | 13 | bool Bitmap::isPixel(int pixel) { |
| stretch | 0:3058939fa37c | 14 | return isPixel(pixel, false); |
| stretch | 0:3058939fa37c | 15 | } |
| stretch | 0:3058939fa37c | 16 | |
| stretch | 0:3058939fa37c | 17 | bool Bitmap::isBlankRow(void) { |
| stretch | 0:3058939fa37c | 18 | for (int i = 0; i < width; i++) { |
| stretch | 0:3058939fa37c | 19 | if (isPixel(i)) |
| stretch | 0:3058939fa37c | 20 | return false; |
| stretch | 0:3058939fa37c | 21 | } |
| stretch | 0:3058939fa37c | 22 | return true; |
| stretch | 0:3058939fa37c | 23 | } |
| stretch | 0:3058939fa37c | 24 | |
| stretch | 0:3058939fa37c | 25 | Bitmap::Bitmap () { |
| stretch | 0:3058939fa37c | 26 | loaded = false; |
| stretch | 0:3058939fa37c | 27 | fp = NULL; |
| stretch | 0:3058939fa37c | 28 | row_data = NULL; |
| stretch | 0:3058939fa37c | 29 | } |
| stretch | 0:3058939fa37c | 30 | |
| stretch | 0:3058939fa37c | 31 | bool Bitmap::openImg(char* filename) { |
| stretch | 0:3058939fa37c | 32 | if (fp != NULL) { |
| stretch | 0:3058939fa37c | 33 | fclose(fp); |
| stretch | 0:3058939fa37c | 34 | free(row_data); |
| stretch | 0:3058939fa37c | 35 | } |
| stretch | 0:3058939fa37c | 36 | fp = fopen(filename, "rb"); |
| stretch | 0:3058939fa37c | 37 | loaded = true; |
| stretch | 0:3058939fa37c | 38 | fseek(fp, OFFSET_LOCATION, SEEK_SET); |
| stretch | 0:3058939fa37c | 39 | fread((char *) &offset, 1, 4, fp); |
| stretch | 0:3058939fa37c | 40 | fseek(fp, WIDTH_LOCATION, SEEK_SET); |
| stretch | 0:3058939fa37c | 41 | fread((char *) &width, 1, 4, fp); |
| stretch | 0:3058939fa37c | 42 | fread(&height, sizeof(long), 1, fp); |
| stretch | 0:3058939fa37c | 43 | fseek(fp, HEIGHT_LOCATION, SEEK_SET); |
| stretch | 0:3058939fa37c | 44 | row_size = (width % 32) ? 4 * ((width / 32) + 1) : 4 * (width / 32); |
| stretch | 0:3058939fa37c | 45 | row_data = (char *) malloc(row_size * sizeof(char)); |
| stretch | 0:3058939fa37c | 46 | return true; |
| stretch | 0:3058939fa37c | 47 | } |
| stretch | 0:3058939fa37c | 48 | |
| stretch | 0:3058939fa37c | 49 | bool Bitmap::setRow(int row) { |
| stretch | 0:3058939fa37c | 50 | if (loaded) { |
| stretch | 0:3058939fa37c | 51 | row_num = row; |
| stretch | 0:3058939fa37c | 52 | fseek(fp, offset + row * row_size*sizeof(char), SEEK_SET); |
| stretch | 0:3058939fa37c | 53 | fread(row_data, sizeof(char), row_size, fp); |
| stretch | 0:3058939fa37c | 54 | return true; |
| stretch | 0:3058939fa37c | 55 | } else { |
| stretch | 0:3058939fa37c | 56 | return false; |
| stretch | 0:3058939fa37c | 57 | } |
| stretch | 0:3058939fa37c | 58 | } |
| stretch | 0:3058939fa37c | 59 | |
| stretch | 0:3058939fa37c | 60 | bool Bitmap::closeImg(void) { |
| stretch | 0:3058939fa37c | 61 | fclose(fp); |
| stretch | 0:3058939fa37c | 62 | free(row_data); |
| stretch | 0:3058939fa37c | 63 | return true; |
| stretch | 0:3058939fa37c | 64 | } |
| stretch | 0:3058939fa37c | 65 | |
| stretch | 0:3058939fa37c | 66 | int Bitmap::getHeight() { |
| stretch | 0:3058939fa37c | 67 | return height; |
| stretch | 0:3058939fa37c | 68 | } |
| stretch | 0:3058939fa37c | 69 | |
| stretch | 0:3058939fa37c | 70 | int Bitmap::getWidth() { |
| stretch | 0:3058939fa37c | 71 | return width; |
| stretch | 0:3058939fa37c | 72 | } |
| stretch | 0:3058939fa37c | 73 |