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Diffstat (limited to 'src/bitmap.c')
-rw-r--r--src/bitmap.c246
1 files changed, 125 insertions, 121 deletions
diff --git a/src/bitmap.c b/src/bitmap.c
index bb88b46..a987e25 100644
--- a/src/bitmap.c
+++ b/src/bitmap.c
@@ -2,159 +2,163 @@
uint32_t bitmap_flip_byte(unsigned char* _v, int _c)
{
- uint32_t ret = 0;
- uint32_t counter = (_c-1) * 8;
+ uint32_t ret = 0;
+ uint32_t counter = (_c-1) * 8;
- for(int i = 0; i < _c; i++)
- {
- ret |= (uint32_t)(_v[i] << (counter));
- counter -= 8;
- }
+ for(int i = 0; i < _c; i++)
+ {
+ ret |= (uint32_t)(_v[i] << (counter));
+ counter -= 8;
+ }
- return ret;
+ return ret;
}//flip
struct bitmap_pixel_data bitmap_read(char *_file)
{
- struct bitmap_pixel_data ret;
- struct bitmap_file_header header;
+ struct bitmap_pixel_data ret;
+ struct bitmap_file_header header;
- ret.R = ret.G = ret.B = NULL;
- ret.error = 1;
+ ret.R = ret.G = ret.B = NULL;
+ ret.error = 1;
- FILE *bitmap = fopen(_file,"rb");
+ FILE *bitmap;
+ if(_file)
+ bitmap = fopen(_file,"rb");
+ else
+ bitmap = stdin;
- if(!bitmap)
- return ret;
+ if(!bitmap)
+ return ret;
- header = bitmap_read_file_header(bitmap);
+ header = bitmap_read_file_header(bitmap);
- if(header.error)
- return ret;
+ if(header.error)
+ return ret;
- if(header.biBitCount != 24)
- return ret;
+ if(header.biBitCount != 24)
+ return ret;
- if(header.biCompression != 0)
- return ret;
+ if(header.biCompression != 0)
+ return ret;
- ret = bitmap_read_pixel_data(bitmap, header);
+ ret = bitmap_read_pixel_data(bitmap, header);
- free(header.tables);
- fclose(bitmap);
+ free(header.tables);
+ fclose(bitmap);
- ret.error = 0;
- return ret;
+ ret.error = 0;
+ return ret;
}
struct bitmap_file_header bitmap_read_file_header(FILE *_file)
{
- struct bitmap_file_header ret;
- unsigned char fileheader[_HEADER_SIZE];
- uint32_t read_counter = 0;
+ struct bitmap_file_header ret;
+ unsigned char fileheader[_HEADER_SIZE];
+ uint32_t read_counter = 0;
- ret.error = 1;
+ ret.error = 1;
- size_t tt = fread((void*)&fileheader, sizeof(char), _HEADER_SIZE, _file);
- read_counter += _HEADER_SIZE;
+ size_t tt = fread((void*)&fileheader, sizeof(char), _HEADER_SIZE, _file);
+ read_counter += _HEADER_SIZE;
- if(!tt)
- return ret;
+ if(!tt)
+ return ret;
- //Copy file header
- ret.bfType = (uint16_t) bitmap_flip_byte(&fileheader[BF_TYPE], sizeof(ret.bfType));
+ //Copy file header
+ ret.bfType = (uint16_t) bitmap_flip_byte(&fileheader[BF_TYPE], sizeof(ret.bfType));
- if(ret.bfType != (uint16_t)IDENTIFIER)
- return ret;
+ if(ret.bfType != (uint16_t)IDENTIFIER)
+ return ret;
- ret.bfSize = (uint32_t) bitmap_flip_byte(&fileheader[BF_SIZE], sizeof(ret.bfSize));
- ret.bfOffBits = *(uint32_t*) &fileheader[BF_OFF_BITS];
- ret.biSize = *(uint32_t*) &fileheader[BI_SIZE];
- ret.biWidth = *(int32_t*) &fileheader[BI_WIDTH];
- ret.biHeight = *(int32_t*) &fileheader[BI_HEIGHT];
- ret.biBitCount = *(uint16_t*) &fileheader[BI_BIT_COUNT];
- ret.biCompression = (uint32_t) bitmap_flip_byte(&fileheader[BI_COMPRESSION], sizeof(ret.biCompression));
- ret.biSizeImage = *(uint32_t*) &fileheader[BI_SIZE_IMAGE];
- ret.biClrUsed = (uint32_t) bitmap_flip_byte(&fileheader[BI_CLR_USED], sizeof(ret.biClrUsed));
- ret.biClrImportant = (uint32_t) bitmap_flip_byte(&fileheader[BI_CLR_IMPORTANT], sizeof(ret.biClrImportant));
+ ret.bfSize = (uint32_t) bitmap_flip_byte(&fileheader[BF_SIZE], sizeof(ret.bfSize));
+ ret.bfOffBits = *(uint32_t*) &fileheader[BF_OFF_BITS];
+ ret.biSize = *(uint32_t*) &fileheader[BI_SIZE];
+ ret.biWidth = *(int32_t*) &fileheader[BI_WIDTH];
+ ret.biHeight = *(int32_t*) &fileheader[BI_HEIGHT];
+ ret.biBitCount = *(uint16_t*) &fileheader[BI_BIT_COUNT];
+ ret.biCompression = (uint32_t) bitmap_flip_byte(&fileheader[BI_COMPRESSION], sizeof(ret.biCompression));
+ ret.biSizeImage = *(uint32_t*) &fileheader[BI_SIZE_IMAGE];
+ ret.biClrUsed = (uint32_t) bitmap_flip_byte(&fileheader[BI_CLR_USED], sizeof(ret.biClrUsed));
+ ret.biClrImportant = (uint32_t) bitmap_flip_byte(&fileheader[BI_CLR_IMPORTANT], sizeof(ret.biClrImportant));
- //Read to start of Pixel block
- //This block contains Colormasks and Colortables.
- ret.tablesc = ret.bfOffBits - read_counter;
- ret.tables = malloc(sizeof(char)* ret.tablesc);
- fread(ret.tables, sizeof(char), ret.tablesc, _file);
- //////////
+ //Read to start of Pixel block
+ //This block contains Colormasks and Colortables.
+ ret.tablesc = ret.bfOffBits - read_counter;
+ ret.tables = malloc(sizeof(char)* ret.tablesc);
+ fread(ret.tables, sizeof(char), ret.tablesc, _file);
+ //////////
- ret.error = 0;
- return ret;
+ ret.error = 0;
+ return ret;
}
struct bitmap_pixel_data bitmap_read_pixel_data(FILE *_file, struct bitmap_file_header _header)
{
- uint32_t **bitmap_buff;
-
- struct bitmap_pixel_data ret;
-
- uint32_t row_size = _header.biWidth * 3;
- while(row_size%4)
- row_size++;
-
- ret.x = _header.biWidth;
- ret.y = _header.biHeight < 0 ? -_header.biHeight: _header.biHeight;
-
- //If biHeight > 0 Data starts with last row!!
-
- //Allocate 2D array
- //!!
- //bitmap_buff indeces are flipped!! [y][x]!!!!!
- bitmap_buff = malloc(sizeof(*bitmap_buff) * _header.biHeight);
- for(int i = 0; i < ret.y; i++)
- {
- bitmap_buff[i] = malloc(sizeof(*bitmap_buff[i]) * _header.biWidth);
- }
-
- //Copy Bitmap into bitmap_buff
- for(int row = 0; row < _header.biHeight; row++)
- {
- //printf("Row %i\n", row);
- //fread(bitmap_buff[row], sizeof(char), row_size, bitmap);
- for(int col = 0; col < _header.biWidth; col++)
- fread(&bitmap_buff[row][col], 1, 3, _file);
-
- for(int i = 0; i < row_size - (_header.biWidth * 3); i++) //read excess NULL-Bytes
- fgetc(_file);
- }
-
- ret.x = _header.biWidth;
- ret.y = _header.biHeight < 0 ? -_header.biHeight: _header.biHeight;
-
- ret.R = malloc(sizeof(*ret.R) * ret.x);
- ret.G = malloc(sizeof(*ret.G) * ret.x);
- ret.B = malloc(sizeof(*ret.B) * ret.x);
- for(int i = 0; i < ret.x; i++)
- {
- ret.R[i] = malloc(sizeof(*ret.R[i]) * ret.y);
- ret.G[i] = malloc(sizeof(*ret.G[i]) * ret.y);
- ret.B[i] = malloc(sizeof(*ret.B[i]) * ret.y);
- }
-
- for(int y = 0; y < ret.y; y++)
- {
- for(int x = 0; x < ret.x; x++)
- {
- int row = _header.biHeight > 0 ? (ret.y - 1) - y : y;
-
- ret.R[x][y] = (bitmap_buff[row][x] & 0xff0000)>>16;
- ret.G[x][y] = (bitmap_buff[row][x] & 0x00ff00)>>8;
- ret.B[x][y] = (bitmap_buff[row][x] & 0x0000ff);
- }
- }
-
- for(int i = 0; i < ret.y; i++)
- free(bitmap_buff[i]);
- free(bitmap_buff);
-
- return ret;
+ uint32_t **bitmap_buff;
+
+ struct bitmap_pixel_data ret;
+
+ uint32_t row_size = _header.biWidth * 3;
+ while(row_size%4)
+ row_size++;
+
+ ret.x = _header.biWidth;
+ ret.y = _header.biHeight < 0 ? -_header.biHeight: _header.biHeight;
+
+ //If biHeight > 0 Data starts with last row!!
+
+ //Allocate 2D array
+ //!!
+ //bitmap_buff indeces are flipped!! [y][x]!!!!!
+ bitmap_buff = malloc(sizeof(*bitmap_buff) * _header.biHeight);
+ for(int i = 0; i < ret.y; i++)
+ {
+ bitmap_buff[i] = malloc(sizeof(*bitmap_buff[i]) * _header.biWidth);
+ }
+
+ //Copy Bitmap into bitmap_buff
+ for(int row = 0; row < _header.biHeight; row++)
+ {
+ //printf("Row %i\n", row);
+ //fread(bitmap_buff[row], sizeof(char), row_size, bitmap);
+ for(int col = 0; col < _header.biWidth; col++)
+ fread(&bitmap_buff[row][col], 1, 3, _file);
+
+ for(int i = 0; i < row_size - (_header.biWidth * 3); i++) //read excess NULL-Bytes
+ fgetc(_file);
+ }
+
+ ret.x = _header.biWidth;
+ ret.y = _header.biHeight < 0 ? -_header.biHeight: _header.biHeight;
+
+ ret.R = malloc(sizeof(*ret.R) * ret.x);
+ ret.G = malloc(sizeof(*ret.G) * ret.x);
+ ret.B = malloc(sizeof(*ret.B) * ret.x);
+ for(int i = 0; i < ret.x; i++)
+ {
+ ret.R[i] = malloc(sizeof(*ret.R[i]) * ret.y);
+ ret.G[i] = malloc(sizeof(*ret.G[i]) * ret.y);
+ ret.B[i] = malloc(sizeof(*ret.B[i]) * ret.y);
+ }
+
+ for(int y = 0; y < ret.y; y++)
+ {
+ for(int x = 0; x < ret.x; x++)
+ {
+ int row = _header.biHeight > 0 ? (ret.y - 1) - y : y;
+
+ ret.R[x][y] = (bitmap_buff[row][x] & 0xff0000)>>16;
+ ret.G[x][y] = (bitmap_buff[row][x] & 0x00ff00)>>8;
+ ret.B[x][y] = (bitmap_buff[row][x] & 0x0000ff);
+ }
+ }
+
+ for(int i = 0; i < ret.y; i++)
+ free(bitmap_buff[i]);
+ free(bitmap_buff);
+
+ return ret;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 05:19:20 +0000