mirror of
https://github.com/usetrmnl/bb_epaper.git
synced 2026-04-29 13:43:26 -07:00
Enhanced image convert tool to accept all bit depths as input
This commit is contained in:
Laurence Bank
+101
-40
@@ -124,13 +124,74 @@ void AddHexBytes(FILE *f, void *pData, int iLen, int bLast)
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fprintf(f, "};\n");
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}
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} /* AddHexBytes() */
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//
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// The user passed a file with the wrong bit depth (not 1)
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// convert to 1-bpp by converting each color to 0 or 1 based on the gray level
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//
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void ConvertTo1Bpp(uint8_t *pBMP, int w, int h, int iBpp, uint8_t *palette)
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{
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int g, x, y, iDelta, iPitch, iDestPitch;
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uint8_t *s, *d, *pPal, u8, count;
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iPitch = (w * iBpp)/8;
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iPitch = (iPitch + 3) & 0xfffc;
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iDestPitch = (w+7)/8;
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iDestPitch = (iDestPitch + 3) & 0xfffc; // round to nearest "DWORD"
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iDelta = iBpp/8;
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for (y=0; y<h; y++) {
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s = &pBMP[iPitch * y];
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d = &pBMP[iDestPitch * y]; // overwrite the original data as we change it
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count = 8; // bits in a byte
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u8 = 0; // start with all black
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for (x=0; x<w; x++) { // slower code, but less code :)
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u8 <<= 1;
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switch (iBpp) {
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case 24:
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case 32:
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g = (s[0] + s[1]*2 + s[2])/4; // gray value
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s += iDelta;
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break;
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case 16:
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g = s[1] & 0xf8; // red
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g += ((s[0] | s[1] << 8) << 2) & 0x1f0; // green x 2
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g += (s[0] << 3) & 0xf8; // blue
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g /= 4;
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s += 2;
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break;
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case 8:
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pPal = &palette[s[0] * 4];
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g = (pPal[0] + pPal[1]*2 + pPal[2])/4;
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s++;
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break;
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case 4:
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if (x & 1) {
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pPal = &palette[(s[0] & 0xf) * 4];
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g = (pPal[0] + pPal[1]*2 + pPal[2])/4;
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s++;
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} else {
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pPal = &palette[(s[0]>>4) * 4];
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g = (pPal[0] + pPal[1]*2 + pPal[2])/4;
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}
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break;
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} // switch on bpp
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if (g >= 128) u8 |= 1; // white
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count--;
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if (count == 0) { // byte is full, move on
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*d++ = u8;
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u8 = 0;
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count = 8;
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}
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} // for x
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} // for y
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} /* ConvertTo1Bpp() */
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int main(int argc, const char * argv[]) {
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uint8_t *pBMP, *pOut;
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uint8_t *s, *pBMP, *pOut;
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int rc, w, h, y, bpp;
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int iOutSize, iPitch;
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G5ENCIMAGE g5enc;
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BB_BITMAP bbbm;
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uint8_t palette[1024];
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int bHFile; // flag indicating if the output will be a .H file of hex data
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printf("Group5 image conversion tool\n");
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@@ -141,48 +202,48 @@ int main(int argc, const char * argv[]) {
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pOut = (uint8_t *)argv[2] + strlen(argv[2]) - 1;
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bHFile = (pOut[0] == 'H' || pOut[0] == 'h'); // output an H file?
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pBMP = ReadBMP(argv[1], &w, &h, &bpp, NULL);
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if (bpp == 1) {
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uint8_t *s = pBMP;
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printf("bmp size %d x %d\n", w, h);
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iPitch = (w+7) >> 3;
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pOut = (uint8_t *)malloc(iPitch * h);
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rc = g5_encode_init(&g5enc, w, h, pOut, iPitch * h);
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for (y=0; y<h && rc == G5_SUCCESS; y++) {
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rc = g5_encode_encodeLine(&g5enc, s);
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s += iPitch;
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}
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if (rc == G5_ENCODE_COMPLETE) {
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FILE *f;
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printf("Encode succeeded!\n");
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iOutSize = g5_encode_getOutSize(&g5enc);
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printf("Input size: %d bytes, output size: %d bytes\n", iPitch*h, iOutSize);
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printf("Compression ratio: %2.1f:1\n", (float)(iPitch*h) / (float)iOutSize);
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bbbm.u16Marker = BB_BITMAP_MARKER;
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bbbm.width = w;
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bbbm.height = h;
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bbbm.size = iOutSize;
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f = fopen(argv[2], "w+b");
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if (!f) {
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printf("Error opening: %s\n", argv[2]);
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} else {
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if (bHFile) { // generate HEX file to include in a project
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StartHexFile(f, iOutSize+sizeof(BB_BITMAP), w, h, argv[2]);
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AddHexBytes(f, &bbbm, sizeof(BB_BITMAP), 0);
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AddHexBytes(f, pOut, iOutSize, 1);
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} else { // generate a binary file
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fwrite(&bbbm, 1, sizeof(BB_BITMAP), f);
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fwrite(pOut, 1, iOutSize, f);
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}
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fflush(f);
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fclose(f);
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}
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pBMP = ReadBMP(argv[1], &w, &h, &bpp, palette);
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if (bpp != 1) { // need to convert it to 1-bpp
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printf("Converting from %d-bpp to 1-bpp\n", bpp);
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ConvertTo1Bpp(pBMP, w, h, bpp, palette);
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}
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s = pBMP;
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printf("Bitmap size: %d x %d\n", w, h);
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iPitch = (w+7) >> 3;
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pOut = (uint8_t *)malloc(iPitch * h);
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rc = g5_encode_init(&g5enc, w, h, pOut, iPitch * h);
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for (y=0; y<h && rc == G5_SUCCESS; y++) {
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rc = g5_encode_encodeLine(&g5enc, s);
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s += iPitch;
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}
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if (rc == G5_ENCODE_COMPLETE) {
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FILE *f;
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iOutSize = g5_encode_getOutSize(&g5enc);
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printf("Input data size: %d bytes, compressed size: %d bytes\n", iPitch*h, iOutSize);
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printf("Compression ratio: %2.1f:1\n", (float)(iPitch*h) / (float)iOutSize);
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bbbm.u16Marker = BB_BITMAP_MARKER;
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bbbm.width = w;
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bbbm.height = h;
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bbbm.size = iOutSize;
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f = fopen(argv[2], "w+b");
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if (!f) {
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printf("Error opening: %s\n", argv[2]);
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} else {
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printf("Error encoding image: %d\n", rc);
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if (bHFile) { // generate HEX file to include in a project
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StartHexFile(f, iOutSize+sizeof(BB_BITMAP), w, h, argv[2]);
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AddHexBytes(f, &bbbm, sizeof(BB_BITMAP), 0);
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AddHexBytes(f, pOut, iOutSize, 1);
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printf(".H file created successfully!\n");
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} else { // generate a binary file
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fwrite(&bbbm, 1, sizeof(BB_BITMAP), f);
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fwrite(pOut, 1, iOutSize, f);
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printf("Binary file created successfully!\n");
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}
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fflush(f);
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fclose(f);
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}
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} else {
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printf("Only 1-bpp images are supported.\n");
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printf("Error encoding image: %d\n", rc);
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}
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free(pBMP);
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return 0;
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