|
Título: Quick'n'Dirty GIMP BMP -> MSX (sc5, sc6) Publicado por: pitpan en 12 de Octubre de 2010, 01:33:01 pm Please read this first:
- This tiny program does not implement full BMP format - It will only work in BMP files saved by GIMP program with 16 colours and no RLE compression - The resulting PAL and PAT files are the palette and pattern raw data in MSX format, but they have no heading - Compile using GCC: gcc bmp2msx.c -obmp2msx - Probably it will work also in Windows/Mac with GIMP files, but it hasn't been tested - This code is pure crap, I know it, so don't bother to comment it aloud ;) Código: // BMP -> raw SCREEN 5/6 converter (palette and pattern files) // Eduardo Robsy Petrus, 2010 // v.0.1 // Use with GIMP BMP files with 16 colours and no RLE compression // Make sure that the image has even pixel width #include<stdio.h> FILE *input,*output; int i,j,x,y,k; unsigned char buffer[1024*128]; int main(int argc, char *argv[]) { // Print tool name printf("BMP2MSX v.0.1 - converts GIMP 16-colour BMP to MSX Screen 5/6\n"); // Check if there is a filename parameter if (argc!=2) { // If not, print brief instructions printf("Usage: bmp2msx [file.bmp]\n"); return 0; } // Try to open the file if ((input=fopen(argv[1],"r"))==NULL) { printf("Cannot open %s\n",argv[1]); return 1; } // Read all file to buffer for (i=0;!feof(input);buffer[i++]=fgetc(input)); i--; fclose(input); // Create palette file output=fopen("output.pal","w"); for (i=0;i<16;i++) { j=((buffer[0x35+i*4+3]/32)*16)+(buffer[0x35+i*4+1]/32); fputc(j,output); j=buffer[0x35+i*4+2]/32; fputc(j,output); } fclose(output); // Create pattern file output=fopen("output.pat","w"); x=(buffer[0x12]+buffer[0x13]*256)/2; y=buffer[0x16]+buffer[0x17]*256; printf("%i x %i pixels\n",x,y); for (j=y-1;j>=0;j--) for (i=0;i<x;i++) { k=buffer[buffer[2]+j*x+i]; fputc(k,output); } fclose(output); return; } A very easy process to convert images: - Open/Edit the image in GIMP - Convert to indexed image (image > mode > indexed), set 16 as maximum colours and enable dithering if you need it - Save as BMP file with no RLE compression - Use the provided command-line tool to convert it easily - Generate the required code to render the image back in MSX! |