sprite from lodev and capture from random stackoverflow thread, now lets understand this nightmare

1 files changed, 84 insertions, 16 deletions

diff --git a/src/capture.c b/src/capture.c
index a052709..72c1f81 100644
--- a/src/capture.c
+++ b/src/capture.c
@@ -6,7 +6,7 @@
 /*   By: cacharle <marvin@42.fr>                    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2020/01/11 13:15:11 by cacharle          #+#    #+#             */
-/*   Updated: 2020/02/02 08:33:14 by cacharle         ###   ########.fr       */
+/*   Updated: 2020/02/03 02:25:43 by cacharle         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -14,14 +14,14 @@
 
 #define BM_FILE_TYPE 19778
 #define DATA_OFFSET 1078
-#define BITMAP_INFO_HEADER_SIZE 40
+#define BITMAP_INFO_HEADER_SIZE 0x424d
 #define CAPTURE_FILENAME "capture.bmp"
 
 int		capture(t_state *state)
 {
 	t_bmp_header	header;
 
-	render_update_window(state, CELL_WALL);
+	render_update_window(state);
 	bmp_fill_header(&state->window, &header);
 	if (!bmp_write(&state->window, &header))
 	{
@@ -31,15 +31,81 @@ int		capture(t_state *state)
 	return (0);
 }
 
+unsigned char* createBitmapFileHeader(int height, int width, int paddingSize){
+	int fileSize = 14 + 40 + (3*width+paddingSize) * height;
+
+	static unsigned char fileHeader[] = {
+		0,0, /// signature
+		0,0,0,0, /// image file size in bytes
+		0,0,0,0, /// reserved
+		0,0,0,0, /// start of pixel array
+	};
+
+	fileHeader[ 0] = (unsigned char)('B');
+	fileHeader[ 1] = (unsigned char)('M');
+	fileHeader[ 2] = (unsigned char)(fileSize    );
+	fileHeader[ 3] = (unsigned char)(fileSize>> 8);
+	fileHeader[ 4] = (unsigned char)(fileSize>>16);
+	fileHeader[ 5] = (unsigned char)(fileSize>>24);
+	fileHeader[10] = (unsigned char)(14 + 40);
+
+	return fileHeader;
+}
+
+unsigned char* createBitmapInfoHeader(int height, int width){
+	static unsigned char infoHeader[] = {
+		0,0,0,0, /// header size
+		0,0,0,0, /// image width
+		0,0,0,0, /// image height
+		0,0, /// number of color planes
+		0,0, /// bits per pixel
+		0,0,0,0, /// compression
+		0,0,0,0, /// image size
+		0,0,0,0, /// horizontal resolution
+		0,0,0,0, /// vertical resolution
+		0,0,0,0, /// colors in color table
+		0,0,0,0, /// important color count
+	};
+
+	infoHeader[ 0] = (unsigned char)(40);
+	infoHeader[ 4] = (unsigned char)(width    );
+	infoHeader[ 5] = (unsigned char)(width>> 8);
+	infoHeader[ 6] = (unsigned char)(width>>16);
+	infoHeader[ 7] = (unsigned char)(width>>24);
+	infoHeader[ 8] = (unsigned char)(height    );
+	infoHeader[ 9] = (unsigned char)(height>> 8);
+	infoHeader[10] = (unsigned char)(height>>16);
+	infoHeader[11] = (unsigned char)(height>>24);
+	infoHeader[12] = (unsigned char)(1);
+	infoHeader[14] = (unsigned char)(3*8);
+
+	return infoHeader;
+}
+
 t_bool	bmp_write(t_image *image, t_bmp_header *header)
 {
 	int	fd;
 
-	if ((fd = open(CAPTURE_FILENAME, O_WRONLY | O_CREAT)) < 0)
+	unsigned char padding[3] = {0, 0, 0};
+	int paddingSize = (4 - (image->width*3) % 4) % 4; //redundant?
+	unsigned char* fileHeader = createBitmapFileHeader(image->height, image->width, paddingSize);
+	unsigned char* infoHeader = createBitmapInfoHeader(image->height, image->width);
+
+	if ((fd = open(CAPTURE_FILENAME, O_WRONLY | O_CREAT, S_IRWXU)) < 0)
 		return (FALSE);
-	printf("%d\n", fd);
-	write(fd, &header, sizeof(t_bmp_header));
-	write(fd, image->data, image->width * image->height * 4);
+
+	write(fd, fileHeader, 14);
+	write(fd, infoHeader, 40);
+	/* write(fd, &header, sizeof(t_bmp_header)); */
+	for (int i = 0; i < image->width; i++)
+	{
+		for (int j = 0; j < image->height; j++)
+		{
+			write(fd, &image->data[4 * (i * image->width + j)], 3);
+		}
+		write(fd, padding, paddingSize);
+	}
+	/* write(fd, image->data, image->width * image->height * 4); */
 	close(fd);
 	return (TRUE);
 }
@@ -47,23 +113,25 @@ t_bool	bmp_write(t_image *image, t_bmp_header *header)
 void	bmp_fill_header(t_image *image, t_bmp_header *header)
 {
 	header->file_header.file_type = BM_FILE_TYPE;
-	header->file_header.file_size = sizeof(t_bmp_header) + image->width * image->height * 4;
+	header->file_header.file_size = sizeof(t_bmp_header) + image->width * image->height * 3;
 	header->file_header.reserved1 = 0;
 	header->file_header.reserved1 = 0;
-	header->file_header.offset = DATA_OFFSET;
-	header->info_header.size = sizeof(t_bmp_header) + image->width * image->height * 4;
+	header->file_header.offset = sizeof(t_bmp_header);
+
+	header->info_header.size = sizeof(header->info_header);
 	header->info_header.width = image->width;
 	header->info_header.height = image->height;
 	header->info_header.planes = 0;
-	header->info_header.depth = 8 * 4;
+	header->info_header.depth = 8 * 3;
 	header->info_header.compression = 0;
-	header->info_header.size_image = 0;
+	header->info_header.size_image = image->width * image->height * 3;
 	header->info_header.w_pix_per_meter = 0;
 	header->info_header.h_pix_per_meter = 0;
 	header->info_header.color_used = 0;
 	header->info_header.color_important = 0;
-	header->color_table.blue = 0xff;
-	header->color_table.green = 0xff;
-	header->color_table.red = 0xff;
-	header->color_table.reserved = 0;
+
+	/* header->color_table.blue = 0xff; */
+	/* header->color_table.green = 0xff; */
+	/* header->color_table.red = 0xff; */
+	/* header->color_table.reserved = 0; */
 }