diff options
| -rw-r--r-- | Makefile | 2 | ||||
| -rw-r--r-- | Readme.md | 2 | ||||
| -rw-r--r-- | main.c | 130 |
3 files changed, 100 insertions, 34 deletions
@@ -29,4 +29,4 @@ clean: rm -Rdf $(BUILDDIR) run: build - @LD_LIBRARY_PATH=../lib/ $(BUILDDIR)/$(OUTPUT) a.bmp + @LD_LIBRARY_PATH=../lib/ $(BUILDDIR)/$(OUTPUT) b.bmp b.txt @@ -1,3 +1,3 @@ -#AsciiMap +# AsciiMap Converts windows BitMap files to ASCII @@ -19,15 +19,10 @@ #define BI_CLR_USED 0x2e #define BI_CLR_IMPORTANT 0x32 -#define CHAR_SIZE 10 //How many pixels should form one ASCII char? +#define CHAR_SIZE_X 20 //How many pixels should form one ASCII char? +#define CHAR_SIZE_Y (2 * CHAR_SIZE_X) -const char map[] = {' ', '.', ',', '-', ':', ';', '!', '/','?' , '%', '$', '#'}; - -struct ascii_pixel -{ - char i[3 * CHAR_SIZE][CHAR_SIZE]; // - char c; -}; +const char map[] = {' ', '.', ',', '-', '~', ':', ';', '!', '/','?' , '%', '$', '#'}; //Routine for flipping bytes uint32_t flip(unsigned char* _v, int _c); @@ -35,29 +30,33 @@ uint32_t flip(unsigned char* _v, int _c); //Calculate average char avg(int argc, char *argv); +//Select Char based on 1B brightness Value +char calc_char(uint8_t _c); + int main(int argc, char *argv[]) { unsigned char fileheader[_HEADER_SIZE]; unsigned char *tables; - uint32_t **bitmap_buff; - uint32_t read_counter = 0; - - uint16_t bfType = 0; - uint32_t bfSize = 0; - uint32_t bfOffBits = 0; - - uint32_t biSize = 0; - int32_t biWidth = 0; - int32_t biHeight = 0; - uint16_t biBitCount = 0; - uint32_t biCompression = 0; - uint32_t biSizeImage = 0; - uint32_t biClrUsed = 0; + uint32_t **bitmap_buff; + char **ascii_buff; + uint32_t read_counter = 0; + + uint16_t bfType = 0; + uint32_t bfSize = 0; + uint32_t bfOffBits = 0; + + uint32_t biSize = 0; + int32_t biWidth = 0; + int32_t biHeight = 0; + uint16_t biBitCount = 0; + uint32_t biCompression = 0; + uint32_t biSizeImage = 0; + uint32_t biClrUsed = 0; uint32_t biClrImportant = 0; - if(argc < 2) + if(argc != 3) { - printf("No input file specified. Abort.\n"); + printf("Usage: %s <input> <output>\n", argv[0]); return 1; } @@ -121,11 +120,11 @@ int main(int argc, char *argv[]) uint32_t d = bfOffBits - read_counter; tables = malloc(sizeof(char)* d); fread(tables, sizeof(char), d, bitmap); - read_counter += d; printf("Read to %x\n", read_counter); - uint32_t row_size = biWidth * 3; //One pixel is 3Byte, One line is multiple of 4Bytes + //One pixel is 3Byte, One line is multiple of 4Bytes + uint32_t row_size = biWidth * 3; while(row_size%4) row_size++; @@ -133,21 +132,82 @@ int main(int argc, char *argv[]) //If biHeight > 0 Data starts with last row!! //Allocate 2D array - bitmap_buff = malloc(sizeof(*bitmap_buff) * biWidth); - for(int i = 0; i < biWidth; i++) + bitmap_buff = malloc(sizeof(*bitmap_buff) * biHeight); + for(int i = 0; i < biHeight; i++) + { + bitmap_buff[i] = malloc(sizeof(*bitmap_buff[i]) * biWidth); + } + + //Copy Bitmap + for(int row = 0; row < biHeight; row++) { - bitmap_buff[i] = malloc(sizeof(*bitmap_buff[i]) * biHeight); + //printf("Row %i\n", row); + fread(bitmap_buff[row], sizeof(char), row_size, bitmap); + read_counter += row_size; } + printf("Finished copying Bitmap\n"); - for(int i = 0; i < biWidth; i++) - free(bitmap_buff[i]); + //Calculate Averages of CHAR_SIZE x CHAR_SIZE blocks + unsigned int size_x,size_y; + size_x = biWidth / CHAR_SIZE_X; + size_y = biHeight / CHAR_SIZE_Y; + + printf("Creating ASCII File %u x %u\n", size_x, size_y); + + ascii_buff = malloc(sizeof(*ascii_buff) * size_x); + for (int i = 0; i < size_x; i++) + { + ascii_buff[i] = malloc(sizeof(ascii_buff[i]) * size_y); + } + + //Nest thine Lööps + for(int x = 0; x < size_x; x++) + { + for(int y = 0; y < size_y; y++) + { + char b = 0; + + + for(int row = y * CHAR_SIZE_Y; row < (y + 1) * CHAR_SIZE_Y; row ++) + { + //x * CHAR_SIZE_X + char d[2] = {avg(CHAR_SIZE_X, ascii_buff[y]), b}; + b = avg(2, d); + } + ascii_buff[x][y] = calc_char(b); + } + } + + //Write Output + printf("Opening %s for writing.\n", argv[2]); + FILE *out = fopen(argv[2], "w"); + if(!out) + { + printf("Error opening output File. Check writing permissions.\n"); + return 1; + } + + for(int y = size_y; y >= 0; y--) + { + for(int x = 0; x < size_x; x++) + { + fputc(ascii_buff[x][y], out); + } + fputc('\n', out); + } + + //Cleanup + for(int i = 0; i < biHeight; i++) + free (bitmap_buff[i]); free(bitmap_buff); fclose(bitmap); + fclose(out); + return 0; } - +//One pixel is 3Byte, One line is multiple of 4Bytes uint32_t flip(unsigned char* _v, int _c) { uint32_t ret = 0; @@ -174,3 +234,9 @@ char avg(int argc, char *argv) return ret; }//flip + +char calc_char(uint8_t _c) +{ + float c = (float)_c / 255.0; + return map [(int)(sizeof(map) * c)]; +} |