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main.c
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//
//
// epd_image - prepare image data for e-paper displays
// and output it as hex data ready to compile into c code
//
// Specifically - do pixel color matching for GRAY/BW/BWR/BWY/BWYR output
// from any input image, split it into the 1 or 2 memory planes
// and prepare that data to be easily compiled into C code
//
// Written by Larry Bank
//
// Copyright 2023 BitBank Software, Inc. All Rights Reserved.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//===========================================================================
#include <stdint.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef _WIN32
#include <direct.h>
#else
#include <unistd.h>
#endif
#define __LINUX__
#include "JPEGDEC.h"
#include "jpeg.inl"
enum
{
OPTION_BW = 0,
OPTION_BWR,
OPTION_BWY,
OPTION_BWYR,
OPTION_4GRAY,
OPTION_16GRAY,
OPTION_COUNT
};
// How many hex bytes are written per line of output
#define BYTES_PER_LINE 16
// Output format options (black & white, black/white/red, black/white/yellow, 2-bit grayscale)
const char *szOptions[] = {"BW", "BWR", "BWY", "BWYR", "4GRAY", "16GRAY", NULL};
uint8_t ucBlue[256], ucGreen[256], ucRed[256]; // palette colors
#ifdef _WIN32
#define SLASH_CHAR '\\'
#else
#define SLASH_CHAR '/'
#endif
int iWidth, iHeight, iBpp;
int bMSBFirst = 1;
FILE * ihandle;
void GetLeafName(char *fname, char *leaf);
void FixName(char *name);
unsigned char GetGrayPixel(int x, int y, uint8_t *pData, int iPitch, int iBpp);
/* Table to flip the bit direction of a byte */
const uint8_t ucMirror[256]=
{0, 128, 64, 192, 32, 160, 96, 224, 16, 144, 80, 208, 48, 176, 112, 240,
8, 136, 72, 200, 40, 168, 104, 232, 24, 152, 88, 216, 56, 184, 120, 248,
4, 132, 68, 196, 36, 164, 100, 228, 20, 148, 84, 212, 52, 180, 116, 244,
12, 140, 76, 204, 44, 172, 108, 236, 28, 156, 92, 220, 60, 188, 124, 252,
2, 130, 66, 194, 34, 162, 98, 226, 18, 146, 82, 210, 50, 178, 114, 242,
10, 138, 74, 202, 42, 170, 106, 234, 26, 154, 90, 218, 58, 186, 122, 250,
6, 134, 70, 198, 38, 166, 102, 230, 22, 150, 86, 214, 54, 182, 118, 246,
14, 142, 78, 206, 46, 174, 110, 238, 30, 158, 94, 222, 62, 190, 126, 254,
1, 129, 65, 193, 33, 161, 97, 225, 17, 145, 81, 209, 49, 177, 113, 241,
9, 137, 73, 201, 41, 169, 105, 233, 25, 153, 89, 217, 57, 185, 121, 249,
5, 133, 69, 197, 37, 165, 101, 229, 21, 149, 85, 213, 53, 181, 117, 245,
13, 141, 77, 205, 45, 173, 109, 237, 29, 157, 93, 221, 61, 189, 125, 253,
3, 131, 67, 195, 35, 163, 99, 227, 19, 147, 83, 211, 51, 179, 115, 243,
11, 139, 75, 203, 43, 171, 107, 235, 27, 155, 91, 219, 59, 187, 123, 251,
7, 135, 71, 199, 39, 167, 103, 231, 23, 151, 87, 215, 55, 183, 119, 247,
15, 143, 79, 207, 47, 175, 111, 239, 31, 159, 95, 223, 63, 191, 127, 255};
/* Windows BMP header for 8/24/32-bit images (54 bytes) */
uint8_t winbmphdr[54] =
{0x42,0x4d,
0,0,0,0, /* File size */
0,0,0,0,0x36,4,0,0,0x28,0,0,0,
0,0,0,0, /* Xsize */
0,0,0,0, /* Ysize */
1,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* number of planes, bits per pel */
0,0,0,0};
//
// Parse the BMP header and read the pixel data into memory
// returns 1 for success, 0 for failure
//
int ReadBMP(uint8_t *pBMP, int *offbits, int *width, int *height, int *bpp)
{
int cx, cy;
uint8_t ucCompression;
if (pBMP[0] != 'B' || pBMP[1] != 'M') // must start with 'BM'
return 0; // not a BMP file
cx = pBMP[18] | pBMP[19]<<8;
cy = pBMP[22] | pBMP[23]<<8;
ucCompression = pBMP[30]; // 0 = uncompressed, 1/2/4 = RLE compressed
if (ucCompression != 0) { // unsupported feature
printf("unsupported compression type %d\n", ucCompression);
return 0;
}
*width = cx;
*height = cy;
*bpp = pBMP[28] | pBMP[29]<<8;
*offbits = pBMP[10] | pBMP[11]<<8;
// Get the palette as RGB565 values (if there is one)
if (*bpp == 4 || *bpp == 8)
{
int iOff, iColors;
iColors = pBMP[46]; // colors used BMP field
if (iColors == 0 || iColors > (1<<(*bpp)))
iColors = (1 << *bpp); // full palette
iOff = *offbits - (4 * iColors); // start of color palette
for (int x=0; x<iColors; x++)
{
ucBlue[x] = pBMP[iOff++];
ucGreen[x] = pBMP[iOff++];
ucRed[x] = pBMP[iOff++];
iOff++; // skip extra byte
}
}
return 1;
} /* ReadBMP() */
//
// Minimal code to save frames as Windows BMP files
//
void WriteBMP(uint8_t *pBitmap, int cx, int cy, int bpp, FILE *oHandle)
{
int i, bsize, lsize;
uint32_t *l;
uint8_t ucTemp[1024];
uint8_t *s, *pHdr;
int iHeaderSize;
pHdr = winbmphdr;
iHeaderSize = sizeof(winbmphdr);
bsize = ((cx * bpp) + 7) >> 3;
lsize = (bsize + 3) & 0xfffc; /* Width of each line */
pHdr[26] = 1; // number of planes
pHdr[28] = (uint8_t)bpp;
/* Write the BMP header */
l = (uint32_t *)&pHdr[2];
i =(cy * lsize) + iHeaderSize;
if (bpp <= 8)
i += (4<<bpp);
*l = (uint32_t)i; /* Store the file size */
l = (uint32_t *)&pHdr[10]; // offset to the pixels
i -= (cy * lsize); // header + palette size
*l = (uint32_t)i;
l = (uint32_t *)&pHdr[34]; // data size
i = (cy * lsize);
*l = (uint32_t)i; // store data size
l = (uint32_t *)&pHdr[18];
*l = (uint32_t)cx; /* width */
*(l+1) = (uint32_t)cy; /* height */
fwrite(pHdr, 1, iHeaderSize, oHandle);
if (bpp <= 8) { // create a grayscale palette
int iDelta, iCount = 1<<bpp;
int iGray = 0;
iDelta = 255/(iCount-1);
for (i=0; i<iCount; i++) {
ucTemp[i*4+0] = (uint8_t)iGray;
ucTemp[i*4+1] = (uint8_t)iGray;
ucTemp[i*4+2] = (uint8_t)iGray;
ucTemp[i*4+3] = 0;
iGray += iDelta;
}
fwrite(ucTemp, 1, (4<<bpp), oHandle);
}
/* Write the image data */
for (i=cy-1; i>=0; i--)
{
s = &pBitmap[i*bsize];
if (0) { //bpp >= 24) { // swap R/B for Windows BMP byte order
uint8_t ucTemp[2048];
int j, iBpp = bpp/8;
uint8_t *d = ucTemp;
for (j=0; j<cx; j++) {
d[0] = s[2]; d[1] = s[1]; d[2] = s[0];
d += iBpp; s += iBpp;
}
fwrite(ucTemp, 1, (size_t)lsize, oHandle);
} else {
fwrite(s, 1, (size_t)lsize, oHandle);
}
}
fflush(oHandle);
fclose(oHandle);
} /* WriteBMP() */
//
// Create 1 memory plane hex output
//
void MakeC_BW(uint8_t *pSrc, int iOffBits, int iWidth, int iHeight, int iBpp, int iSize, FILE *ohandle, char *szLeaf)
{
int x, y, iSrcPitch, iPitch;
int iIn, iTotal, i, iLine;
uint8_t uc, ucPixel, *s = &pSrc[iOffBits];
iPitch = (iWidth + 7)/8; // output bytes per line
iSrcPitch = ((iWidth * iBpp) + 7)/8;
iSrcPitch = (iSrcPitch + 3) & 0xfffc; // Windows BMP lines are dword aligned
iTotal = iPitch * iHeight; // how many bytes we're creating
// show pitch
fprintf(ohandle, "// Image size: width %d, height %d\n", iWidth, iHeight);
fprintf(ohandle, "// %d bytes per line\n", iPitch);
fprintf(ohandle, "// %d bytes per plane\n", iTotal);
if (bMSBFirst)
fprintf(ohandle, "// MSB on the left\n");
else
fprintf(ohandle, "// LSB on the left\n");
fprintf(ohandle, "const uint8_t %s_0[] PROGMEM = {\n", szLeaf); // start of data array (plane 0)
iLine = i = iIn = 0;
for (y=0; y<iHeight; y++) {
uc = 0;
for (x=0; x<iWidth; x++) {
ucPixel = GetGrayPixel(x, y, s, iSrcPitch, iBpp); // slower, but easier on the eyes
uc <<= 1;
uc |= (ucPixel >> 1); // only need MSB of 2-bit pair
if ((x & 7) == 7 || x == iWidth-1) {
if ((x & 7) != 7) { // adjust last odd byte
uc <<= (7-(x&7));
}
i++;
iLine++;
if (bMSBFirst == 0) uc = ucMirror[uc]; // reverse bit direction
fprintf(ohandle, "0x%02x", uc);
if (i != iTotal) {
fprintf(ohandle, ",");
}
if (iLine == BYTES_PER_LINE) {
fprintf(ohandle, "\n");
iLine = 0;
}
uc = 0;
} // if a whole byte was formed
} // for x
} // for y
fprintf(ihandle, "};\n"); // final closing brace
} /* MakeC_BW() */
//
// Match the given pixel to black (00), white (01), or yellow (1x)
//
unsigned char GetYellowPixel(int x, int y, uint8_t *pData, int iPitch, int iBpp)
{
uint8_t uc=0, *s;
int gr, r=0, g=0, b=0;
switch (iBpp) {
case 4:
s = &pData[(y * iPitch) + (x >> 1)];
uc = s[0];
if ((x & 1) == 0) uc >>= 4;
uc &= 0xf;
b = ucBlue[uc];
g = ucGreen[uc];
r = ucRed[uc];
break;
case 8:
s = &pData[(y * iPitch) + x];
uc = s[0];
b = ucBlue[uc];
g = ucGreen[uc];
r = ucRed[uc];
break;
case 24:
case 32:
s = &pData[(y * iPitch) + ((x * iBpp)>>3)];
b = s[0];
g = s[1];
r = s[2];
break;
} // switch on bpp
gr = (b + r + g*2)>>2; // gray
// match the color to closest of black/white/yellow
if (r > b && g > b) { // yellow is dominant?
if (gr < 100 && r < 80) {
// black
} else {
if (r - b > 32 && g - b > 32) {
// is yellow really dominant?
uc |= 2;
} else { // yellowish should be white
// no, use white instead of pink/yellow
uc |= 1;
}
}
} else { // check for white/black
if (gr >= 100) {
uc |= 1;
} else {
// black
}
}
return uc;
} /* GetYellowPixel() */
//
// Match the given pixel to black (00), white (01), or red (1x)
//
unsigned char GetRedPixel(int x, int y, uint8_t *pData, int iPitch, int iBpp)
{
uint8_t ucOut=0, uc, *s;
int gr=0, r=0, g=0, b=0;
switch (iBpp) {
case 4:
s = &pData[(y * iPitch) + (x >> 1)];
uc = s[0];
if ((x & 1) == 0) uc >>= 4;
uc &= 0xf;
b = ucBlue[uc];
g = ucGreen[uc];
r = ucRed[uc];
break;
case 8:
s = &pData[(y * iPitch) + x];
uc = s[0];
b = ucBlue[uc];
g = ucGreen[uc];
r = ucRed[uc];
break;
case 24:
case 32:
s = &pData[(y * iPitch) + ((x * iBpp)>>3)];
b = s[0];
g = s[1];
r = s[2];
break;
} // switch on bpp
gr = (b + r + g*2)>>2; // gray
// match the color to closest of black/white/red
if (r > g && r > b) { // red is dominant
if (gr < 100 && r < 80) {
// black
} else {
if (r-b > 32 && r-g > 32) {
// is red really dominant?
ucOut |= 2; // red
} else { // yellowish should be white
// no, use white instead of pink/yellow
ucOut |= 1;
}
}
} else { // check for white/black
if (gr >= 100) {
ucOut |= 1; // white
} else {
// black
}
}
return ucOut;
} /* GetRedPixel() */
//
// Match the given pixel to black (00), white (01), yellow (10), or red (11)
// returns 2 bit value of closest matching color
//
unsigned char GetBWYRPixel(int x, int y, uint8_t *pData, int iPitch, int iBpp)
{
uint8_t ucOut=0, uc=0, *s;
int gr=0, r=0, g=0, b=0;
switch (iBpp) {
case 4:
s = &pData[(y * iPitch) + (x >> 1)];
uc = s[0];
if ((x & 1) == 0) uc >>= 4;
uc &= 0xf;
b = ucBlue[uc];
g = ucGreen[uc];
r = ucRed[uc];
break;
case 8:
s = &pData[(y * iPitch) + x];
uc = s[0];
b = ucBlue[uc];
g = ucGreen[uc];
r = ucRed[uc];
break;
case 24:
case 32:
s = &pData[(y * iPitch) + ((x * iBpp)>>3)];
r = s[2];
g = s[1];
b = s[0];
break;
} // switch on bpp
gr = (b + r + g*2)>>2; // gray
// match the color to closest of black/white/yellow/red
if (r > b || g > b) { // red or yellow is dominant
if (gr < 90 || (r < 80 && g < 80)) {
// black
} else {
if (r-b > 32 && r-g > 70) {
// is red really dominant?
ucOut = 3; // red
} else if (r-b > 32 && g-b > 32) {
// yes, yellow
ucOut = 2;
} else {
ucOut = 1; // gray/white
}
}
} else { // check for white/black
if (gr >= 100) {
ucOut = 1; // white
} else {
// black
}
}
return ucOut;
} /* GetBWYRPixel() */
//
// Return the given pixel as a 2-bit grayscale value
//
unsigned char GetGrayPixel(int x, int y, uint8_t *pData, int iPitch, int iBpp)
{
uint8_t uc=0, *s;
int r=0, g=0, b=0;
switch (iBpp) {
case 1:
s = &pData[(y * iPitch) + (x >> 3)];
uc = s[0];
uc >>= (x & 7);
uc &= 1;
uc |= (uc << 1); // only black/white (00/11)
break;
case 4:
s = &pData[(y * iPitch) + (x >> 1)];
uc = s[0];
if ((x & 1) == 0) uc >>= 4;
uc &= 0xf;
b = ucBlue[uc];
g = ucGreen[uc];
r = ucRed[uc];
b = ((b + g + r*2) >> 2); // simple grayscale
uc = (uint8_t)(b >> 6); // top 2 bits are the gray level
break;
case 8:
s = &pData[(y * iPitch) + x];
uc = s[0];
b = ucBlue[uc];
g = ucGreen[uc];
r = ucRed[uc];
b = ((b + g + r*2) >> 2); // simple grayscale
uc = (uint8_t)(b >> 6); // top 2 bits are the gray level
break;
case 24:
case 32:
s = &pData[(y * iPitch) + ((x * iBpp)>>3)];
b = s[0];
g = s[1];
r = s[2];
b = ((b + g + r*2) >> 2); // simple grayscale
uc = (uint8_t)(b >> 6); // top 2 bits are the gray level
break;
} // switch on bpp
return uc;
} /* GetGrayPixel() */
//
// Return the given pixel as a 4-bit grayscale value
//
unsigned char GetGrayPixel4(int x, int y, uint8_t *pData, int iPitch, int iBpp)
{
uint8_t uc=0, *s;
int r=0, g=0, b=0;
switch (iBpp) {
case 1:
s = &pData[(y * iPitch) + (x >> 3)];
uc = s[0];
uc >>= (x & 7);
uc |= (uc << 1); // only black/white (00/11)
uc |= (uc << 2); // copy to 4 bits
break;
case 4:
s = &pData[(y * iPitch) + (x >> 1)];
uc = s[0];
if ((x & 1) == 0) uc >>= 4;
uc &= 0xf;
b = ucBlue[uc];
g = ucGreen[uc];
r = ucRed[uc];
uc = (uint8_t)((b + g + r*2) >> 6); // simple grayscale
break;
case 8:
s = &pData[(y * iPitch) + x];
uc = s[0];
b = ucBlue[uc];
g = ucGreen[uc];
r = ucRed[uc];
uc = (uint8_t)((b + g + r*2) >> 6); // simple grayscale
break;
case 24:
case 32:
s = &pData[(y * iPitch) + ((x * iBpp)>>3)];
b = s[0];
g = s[1];
r = s[2];
uc = (uint8_t)((b + g + r*2) >> 6); // simple grayscale
break;
} // switch on bpp
return uc;
} /* GetGrayPixel4() */
//
// Return the given pixel as a 8-bit grayscale value
//
unsigned char GetGrayPixel8(int x, int y, uint8_t *pData, int iPitch, int iBpp)
{
uint8_t uc=0, *s;
int r=0, g=0, b=0;
switch (iBpp) {
case 1:
s = &pData[(y * iPitch) + (x >> 3)];
uc = s[0];
uc >>= (x & 7);
uc |= (uc << 1); // only black/white (00/11)
uc |= (uc << 2) | (uc << 4) | (uc << 6);
break;
case 4:
s = &pData[(y * iPitch) + (x >> 1)];
uc = s[0];
if ((x & 1) == 0) uc >>= 4;
uc &= 0xf;
b = ucBlue[uc];
g = ucGreen[uc];
r = ucRed[uc];
uc = (uint8_t)((b + g + r*2) >> 2); // simple grayscale
break;
case 8:
s = &pData[(y * iPitch) + x];
uc = s[0];
b = ucBlue[uc];
g = ucGreen[uc];
r = ucRed[uc];
uc = (uint8_t)((b + g + r*2) >> 2); // simple grayscale
break;
case 24:
case 32:
s = &pData[(y * iPitch) + ((x * iBpp)>>3)];
b = s[0];
g = s[1];
r = s[2];
uc = (uint8_t)((b + g + r*2) >> 2); // simple grayscale
break;
} // switch on bpp
return uc;
} /* GetGrayPixel8() */
//
// Convert 2-bit grayscale (4GRAY) into hex 2-plane output
//
void MakeC_4GRAY(uint8_t *pSrc, int iOffBits, int iWidth, int iHeight, int iBpp, int iSize, FILE *ohandle, char *szLeaf)
{
int iSrcPitch, iPitch;
int i, iPlane, x, y, iIn, iTotal, iLine;
uint8_t ucPixel, uc, *s = &pSrc[iOffBits];
iSrcPitch = ((iBpp * iWidth) + 7)/8;
iSrcPitch = (iSrcPitch + 3) & 0xfffc; // Windows BMP lines are dword aligned
iPitch = (iWidth + 7)/8; // bytes per line of each 1-bpp plane
iTotal = iPitch * iHeight; // how many bytes we're creating
// show pitch
fprintf(ohandle, "// Image size: width %d, height %d\n", iWidth, iHeight);
fprintf(ohandle, "// %d bytes per line\n", iPitch);
fprintf(ohandle, "// %d bytes per plane\n", iTotal);
for (iPlane=0; iPlane<2; iPlane++) {
fprintf(ohandle, "// Plane %d data\n", iPlane);
fprintf(ohandle, "const uint8_t %s_%d[] PROGMEM = {\n", szLeaf, 1-iPlane); // MSB is plane 0 in the UC8151, so reverse the plane number
iLine = i = iIn = 0;
for (y=0; y<iHeight; y++) {
uc = 0;
for (x=0; x<iWidth; x++) {
ucPixel = GetGrayPixel(x, y, s, iSrcPitch, iBpp); // slower, but easier on the eyes
uc <<= 1;
uc |= ((ucPixel >> iPlane) & 1); // add correct plane's bit
if ((x & 7) == 7 || x == iWidth-1) {
if ((x & 7) != 7) { // adjust last odd byte
uc <<= (7-(x&7));
}
i++;
iLine++;
fprintf(ohandle, "0x%02x", uc);
if (i != iTotal) {
fprintf(ohandle, ",");
}
if (iLine == BYTES_PER_LINE) {
fprintf(ohandle, "\n");
iLine = 0;
}
uc = 0;
} // if a whole byte was formed
} // for x
} // for y
fprintf(ihandle, "};\n"); // final closing brace
} // for each plane
} /* MakeC_4GRAY() */
//
// Convert 4-bit grayscale (16GRAY) into hex 1-plane output
//
void MakeC_16GRAY(uint8_t *pSrc, int iOffBits, int iWidth, int iHeight, int iBpp, int iSize, FILE *ohandle, char *szLeaf)
{
int iSrcPitch, iPitch;
int i, x, y, iIn, iTotal, iLine;
uint8_t uc, *s = &pSrc[iOffBits];
iSrcPitch = ((iBpp * iWidth) + 7)/8;
iSrcPitch = (iSrcPitch + 3) & 0xfffc; // Windows BMP lines are dword aligned
iPitch = (iWidth + 1)/2; // bytes per line
iTotal = iPitch * iHeight; // how many bytes we're creating
// show pitch
fprintf(ohandle, "// Image size: width %d, height %d\n", iWidth, iHeight);
fprintf(ohandle, "// %d bytes per line\n", iPitch);
fprintf(ohandle, "// %d bytes per plane\n", iTotal);
fprintf(ohandle, "const uint8_t %s[] PROGMEM = {\n", szLeaf);
iLine = i = iIn = 0;
for (y=0; y<iHeight; y++) {
for (x=0; x<iWidth; x+=2) {
uc = GetGrayPixel4(x, y, s, iSrcPitch, iBpp) << 4; // slower, but easier on the eyes
uc |= GetGrayPixel4(x+1, y, s, iSrcPitch, iBpp);
i++;
iLine++;
fprintf(ohandle, "0x%02x", uc);
if (i != iTotal) {
fprintf(ohandle, ",");
}
if (iLine == BYTES_PER_LINE) {
fprintf(ohandle, "\n");
iLine = 0;
}
} // for x
} // for y
fprintf(ohandle, "};\n"); // final closing brace
} /* MakeC_16GRAY() */
//
// Convert to Black/White/Yellow/Red packed 1-plane output
//
void MakeC_4CLR(uint8_t *pSrc, int iOffBits, int iWidth, int iHeight, int iBpp, int iSize, FILE *ohandle, char *szLeaf)
{
int iSrcPitch, iPitch;
int i, x, y, iIn, iTotal, iLine;
uint8_t ucPixel, uc, *s = &pSrc[iOffBits];
iSrcPitch = ((iBpp * iWidth) + 7)/8;
iSrcPitch = (iSrcPitch + 3) & 0xfffc; // Windows BMP lines are dword aligned
iPitch = (iWidth + 3)/4; // bytes per line of the 2-bpp plane
iTotal = iPitch * iHeight; // how many bytes we're creating
// show pitch
fprintf(ohandle, "// Image size: width %d, height %d\n", iWidth, iHeight);
fprintf(ohandle, "// %d bytes per line\n", iPitch);
fprintf(ohandle, "// %d bytes total\n", iTotal);
fprintf(ohandle, "const uint8_t %s[] PROGMEM = {\n", szLeaf);
iLine = i = iIn = 0;
for (y=0; y<iHeight; y++) {
uc = 0;
for (x=0; x<iWidth; x++) {
ucPixel = GetBWYRPixel(x, y, s, iSrcPitch, iBpp); // slower, but easier on the eyes
uc <<= 2;
uc |= ucPixel; // pack 2 bits at a time into each byte
if ((x & 3) == 3 || x == iWidth-1) { // store new bytes every 4 pixels
if ((x & 3) != 3) { // adjust last odd byte
uc <<= ((3-(x&3))*2);
}
i++;
iLine++;
fprintf(ohandle, "0x%02x", uc);
if (i != iTotal) {
fprintf(ohandle, ",");
}
if (iLine == BYTES_PER_LINE) {
fprintf(ohandle, "\n");
iLine = 0;
}
uc = 0;
} // if a whole byte was formed
} // for x
} // for y
fprintf(ihandle, "};\n"); // final closing brace
} /* MakeC_4CLR() */
//
// Convert BWR/BWY into 2-plane output
//
void MakeC_3CLR(uint8_t *pSrc, int iOffBits, int iWidth, int iHeight, int iBpp, int iSize, FILE *ohandle, char *szLeaf, int iType)
{
int iSrcPitch, iPitch;
int i, iPlane, x, y, iIn, iTotal, iLine;
uint8_t ucPixel, uc, *s = &pSrc[iOffBits];
iSrcPitch = ((iBpp * iWidth) + 7)/8;
iSrcPitch = (iSrcPitch + 3) & 0xfffc; // Windows BMP lines are dword aligned
iPitch = (iWidth + 7)/8; // bytes per line of each 1-bpp plane
iTotal = iPitch * iHeight; // how many bytes we're creating
// show pitch
fprintf(ohandle, "// Image size: width %d, height %d\n", iWidth, iHeight);
fprintf(ohandle, "// %d bytes per line\n", iPitch);
fprintf(ohandle, "// %d bytes per plane\n", iTotal);
for (iPlane=0; iPlane<2; iPlane++) {
fprintf(ohandle, "// Plane %d data\n", iPlane);
fprintf(ohandle, "const uint8_t %s_%d[] PROGMEM = {\n", szLeaf, iPlane);
iLine = i = iIn = 0;
for (y=0; y<iHeight; y++) {
uc = 0;
for (x=0; x<iWidth; x++) {
if (iType == OPTION_BWR)
ucPixel = GetRedPixel(x, y, s, iSrcPitch, iBpp); // slower, but easier on the eyes
else
ucPixel = GetYellowPixel(x, y, s, iSrcPitch, iBpp);
uc <<= 1;
uc |= ((ucPixel >> iPlane) & 1); // add correct plane's bit
if ((x & 7) == 7 || x == iWidth-1) {
if ((x & 7) != 7) { // adjust last odd byte
uc <<= (7-(x&7));
}
i++;
iLine++;
fprintf(ohandle, "0x%02x", uc);
if (i != iTotal) {
fprintf(ohandle, ",");
}
if (iLine == BYTES_PER_LINE) {
fprintf(ohandle, "\n");
iLine = 0;
}
uc = 0;
} // if a whole byte was formed
} // for x
} // for y
fprintf(ihandle, "};\n"); // final closing brace
} // for each plane
} /* MakeC_3CLR() */
//
// mirror image horizontally
//
void MirrorBMP(uint8_t *pPixels, int iWidth, int iHeight, int iBpp)
{
int y;
uint8_t c1,c2,c3, *s, *d;
uint32_t lTemp, *ld, *ls;
int x, iPitch;
iPitch = ((iWidth * iBpp) + 7)/8;
iPitch = (iPitch + 3) & 0xfffc;
switch (iBpp)
{
case 1:
if ((iWidth & 7) == 0) { // multiple of 8 wide
for (y=0; y<iHeight; y++)
{
s = &pPixels[y * iPitch];
d = s + (iWidth>>3) - 1;
x = iWidth >> 4;
while (x)
{
c1 = ucMirror[*s];
c2 = ucMirror[*d];
*s++ = c2;
*d-- = c1;
x--;
}
}
} else {
// DEBUG
}
break;
case 4:
for (y=0; y<iHeight; y++)
{
s = &pPixels[y * iPitch];
d = s + (iWidth>>1) - 1;
x = iWidth >> 2;
while (x)
{
c1 = *s;
c2 = *d;
c1 = (c1 << 4) | (c1 >> 4);
c2 = (c2 << 4) | (c2 >> 4);
*s++ = c2;
*d-- = c1;
x--;
}
}
break;
case 8:
for (y=0; y<iHeight; y++)
{
s = &pPixels[y * iPitch];
d = s + iWidth - 1;
x = iWidth >> 1;
while (x)
{
c1 = *s;
*s++ = *d;
*d-- = c1;
x--;
}
}
break;
case 24:
for (y=0; y<iHeight; y++)
{
s = &pPixels[y * iPitch];
d = s + (iWidth - 1)*3;
x = iWidth >> 1;
while (x)
{
c1 = s[0];
c2 = s[1];
c3 = s[2];
s[0] = d[0];
s[1] = d[1];
s[2] = d[2];
s += 3;
d[0] = c1;
d[1] = c2;
d[2] = c3;
d -= 3;
x--;
}
}
break;
case 32:
for (y=0; y<iHeight; y++)
{
ls = (uint32_t *)&pPixels[y * iPitch];
ld = ls + iWidth - 1;
x = iWidth >> 1;
while (x)
{
lTemp = *ls;
*ls++ = *ld;
*ld-- = lTemp;
x--;
}
}
break;
}
} /* MirrorBMP() */
//
// flip image vertically
//
void FlipBMP(uint8_t *p, int iWidth, int iHeight, int iBpp)
{
int iPitch;
uint8_t c, *s, *d;
iPitch = ((iWidth*iBpp)+7)/8;
iPitch = (iPitch + 3) & 0xfffc;
s = p;
d = &p[iPitch * (iHeight-1)];
for (int y=0; y<iHeight/2; y++) {
for (int x=0; x<iPitch; x++) {
c = s[x];
s[x] = d[x];
d[x] = c; // swap top/bottom lines
}
s += iPitch;
d -= iPitch;
}
} /* FlipBMP() */
void RotateImage(int iRotation, uint8_t *pPixels, int *iWidth, int *iHeight, int iBpp)
{
uint8_t *pTemp, *s, *d, x, y;
int w = *iWidth, h = *iHeight;
int iSrcPitch, iDstPitch;
if (iRotation == 0) return; // nothing to do
if (iRotation == 180) {
FlipBMP(pPixels, w, h, iBpp);
MirrorBMP(pPixels, w, h, iBpp);
return;
}
iSrcPitch = ((w * iBpp)+7)/8;
iSrcPitch = (iSrcPitch + 3) & 0xfffc; // dword aligned
iDstPitch = ((h * iBpp)+7)/8;
iDstPitch = (iDstPitch + 3) & 0xfffc;
switch (iBpp) {
case 1:
break;
case 4:
pTemp = (uint8_t *) malloc((w+2) * iDstPitch);
s = pPixels;
for (y = 0; y < h; y+=2)
{
uint8_t c1, c2, c3;
d = pTemp - y + (w - 1)/2; /* Start at right edge */
for (x=0; x < (h+1)>>1; x++)
{
c1 = *s;
c2 = s[iSrcPitch];
s++;
c3 = (c1 >> 4) | (c2 & 0xf0); /* swap pixels */
c2 = (c2 << 4) | (c1 & 0xf);
*d = c3;
d[iDstPitch] = c2;
d += iDstPitch * 2;
}
s += (iSrcPitch * 2);
}
memcpy(pPixels, pTemp, iDstPitch * w);
free(pTemp);
break;
case 8:
break;
case 24:
case 32:
break;
}
if (iRotation == 270) {
FlipBMP(pPixels, h, w, iBpp);
MirrorBMP(pPixels, h, w, iBpp);
}
if (iRotation == 90 || iRotation == 270) { // swap width/height
x = *iWidth;
*iWidth = *iHeight;
*iHeight = x;
}
} /* RotateImage() */
//
// Pick the best color of black/white/red/yellow
// depending on the output format option
//
void MatchBestColor(uint8_t *pR, uint8_t *pG, uint8_t *pB, int iOutFormat)
{
int gr;
uint8_t r, g, b;
r = *pR; g = *pG; b = *pB;
gr = (b + r + g*2)>>2; // gray
switch (iOutFormat)
{
case OPTION_BWR:
// match the color to closest of black/white/red
if (r > g && r > b) { // red is dominant
if (gr < 100 && r < 80) {
// black
b = g = r = 0;
} else {
if (r-b > 32 && r-g > 32) {
// is red really dominant?
b = g = 0; r = 0xff;
} else { // yellowish should be white
// no, use white instead of pink/yellow
b = g = r = 0xff;
}
}
} else { // check for white/black
if (gr >= 100) {
b = g = r = 0xff;
} else {
// black
b = g = r = 0;
}
}
break;
case OPTION_BWY:
// match the color to closest of black/white/yellow
if (r > b && g > b) { // yellow is dominant?
if (gr < 100 && r < 80) {
r = g = b = 0;
} else {
if (r - b > 32 && g - b > 32) {
// is yellow really dominant?
r = g = 0xff; b = 0;
} else { // yellowish should be white
// no, use white instead of pink/yellow
r = g = b = 0xff;
}
}
} else { // check for white/black
if (gr >= 100) {
r = g = b = 0xff; // white
} else {
r = g = b = 0;
}
}
break;
case OPTION_BWYR:
// match the color to closest of black/white/yellow/red
if (r > b || g > b) { // red or yellow is dominant
if (gr < 90 || (r < 80 && g < 80)) {
r = g = b = 0; // black
} else {
if (r-b > 32 && r-g > 70) {
// is red really dominant?
r = 0xff; g = b = 0; // red
} else if (r-b > 32 && g-b > 32) {
// yellow
r = g = 0xff; b = 0;