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inkplate-6-arduino-library
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Added 4 bit dithering.

This commit is contained in:
nitko12 2020-08-11 10:27:42 +02:00
parent 6fa2de7ed9
commit 7709a4e863
2 changed files with 158 additions and 32 deletions
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142
Inkplate.cpp
View File

@ -432,7 +432,7 @@ int Inkplate::drawBitmapFromSD(SdFile *p, int x, int y, bool dither, bool invert
if (bmpHeader.color == 1)
drawMonochromeBitmapSd(p, bmpHeader, x, y, invert);
if (bmpHeader.color == 4)
drawGrayscaleBitmap4Sd(p, bmpHeader, x, y, invert);
drawGrayscaleBitmap4Sd(p, bmpHeader, x, y, dither, invert);
if (bmpHeader.color == 8)
drawGrayscaleBitmap8Sd(p, bmpHeader, x, y, dither, invert);
if (bmpHeader.color == 24)
@ -476,7 +476,7 @@ int Inkplate::drawBitmapFromWeb(WiFiClient *s, int x, int y, int len, bool dithe
if (bmpHeader.color == 1)
drawMonochromeBitmapWeb(s, bmpHeader, x, y, len, invert);
if (bmpHeader.color == 4)
drawGrayscaleBitmap4Web(s, bmpHeader, x, y, len, invert);
drawGrayscaleBitmap4Web(s, bmpHeader, x, y, len, dither, invert);
if (bmpHeader.color == 8)
drawGrayscaleBitmap8Web(s, bmpHeader, x, y, len, dither, invert);
if (bmpHeader.color == 24)
@ -1076,7 +1076,7 @@ int Inkplate::drawMonochromeBitmapSd(SdFile *f, struct bitmapHeader bmpHeader, i
return 1;
}
int Inkplate::drawGrayscaleBitmap4Sd(SdFile *f, struct bitmapHeader bmpHeader, int x, int y, bool invert)
int Inkplate::drawGrayscaleBitmap4Sd(SdFile *f, struct bitmapHeader bmpHeader, int x, int y, bool dither, bool invert)
{
int w = bmpHeader.width;
int h = bmpHeader.height;
@ -1085,12 +1085,35 @@ int Inkplate::drawGrayscaleBitmap4Sd(SdFile *f, struct bitmapHeader bmpHeader, i
f->seekSet(bmpHeader.startRAW);
int i, j;
uint8_t *bufferPtr;
if (dither) {
bufferPtr = pixelBuffer;
f->read(pixelBuffer, w * 4 + (paddingBits? 4 : 0));
ditherStart(pixelBuffer, bufferPtr, w * 8 + (paddingBits? 4 : 0), invert, 4);
}
for (j = 0; j < h; j++)
{
uint8_t *bufferPtr = pixelBuffer;
bufferPtr = pixelBuffer;
f->read(pixelBuffer, w * 4 + (paddingBits? 4 : 0));
if (dither && j != h - 1) {
ditherLoadNextLine(pixelBuffer, bufferPtr, w * 8 + (paddingBits? 4 : 0), invert, 4);
}
for (i = 0; i < w; i++)
{
if (dither) {
for (int n = 0; n < 8; n++)
{
drawPixel((i * 8) + n + x, h - 1 - j + y, ditherGetPixel((i * 8) + n, h - 1 - j, w * 8 + (paddingBits? 4 : 0), h) >> 5);
}
}
else {
uint32_t pixelRow = *(bufferPtr++) << 24 | *(bufferPtr++) << 16 | *(bufferPtr++) << 8 | *(bufferPtr++);
if (invert)
pixelRow = ~pixelRow;
@ -1099,8 +1122,16 @@ int Inkplate::drawGrayscaleBitmap4Sd(SdFile *f, struct bitmapHeader bmpHeader, i
drawPixel((i * 8) + n + x, h - 1 - j + y, (pixelRow & (0xFULL << (28 - n * 4))) >> (28 - n * 4 + 1));
}
}
}
if (paddingBits)
{
if (dither) {
for (int n = 0; n < paddingBits; n++)
{
drawPixel((i * 8) + n + x, h - 1 - j + y, ditherGetPixel((i * 8) + n, h - 1 - j, w * 8 + (paddingBits? 4 : 0), h) >> 5);
}
}
else {
uint32_t pixelRow = *(bufferPtr++) << 24 | *(bufferPtr++) << 16 | *(bufferPtr++) << 8 | *(bufferPtr++);
if (invert)
pixelRow = ~pixelRow;
@ -1110,6 +1141,9 @@ int Inkplate::drawGrayscaleBitmap4Sd(SdFile *f, struct bitmapHeader bmpHeader, i
}
}
}
if (dither)
ditherSwap(w * 8 + paddingBits);
}
f->close();
return 1;
}
@ -1248,6 +1282,33 @@ void Inkplate::ditherStart(uint8_t *pixelBuffer, uint8_t* bufferPtr, int w, bool
else
ditherBuffer[0][i] = *(bufferPtr++);
}
if (bits == 4) {
int _w = w / 8;
int paddingBits = w % 8;
for (int i = 0; i < _w; ++i) {
for (int n = 0; n < 4; n++) {
uint8_t temp = *(bufferPtr++);
ditherBuffer[0][i * 8 + n * 2] = temp & 0xF0;
ditherBuffer[0][i * 8 + n * 2 + 1] = (temp & 0x0F) << 4;
if (invert) {
ditherBuffer[0][i * 8 + n * 2] = ~ditherBuffer[0][i * 8 + n * 2];
ditherBuffer[0][i * 8 + n * 2 + 1] = ~ditherBuffer[0][i * 8 + n * 2 + 1];
}
}
}
if (paddingBits)
{
uint32_t pixelRow = *(bufferPtr++) << 24 | *(bufferPtr++) << 16 | *(bufferPtr++) << 8 | *(bufferPtr++);
if (invert)
pixelRow = ~pixelRow;
for (int n = 0; n < paddingBits; n++)
{
ditherBuffer[0][_w * 8 + n] = (pixelRow & (0xFULL << ((7 - n) * 4))) >> ((7 - n) * 4 - 4);
}
}
}
}
//Loads next line, after this ditherGetPixel can be called and alters values in next line
@ -1267,7 +1328,33 @@ void Inkplate::ditherLoadNextLine(uint8_t *pixelBuffer, uint8_t* bufferPtr, int
ditherBuffer[1][i] = *(bufferPtr++);
}
}
if (bits == 4) {
int _w = w / 8;
int paddingBits = w % 8;
for (int i = 0; i < _w; ++i) {
for (int n = 0; n < 4; n++) {
uint8_t temp = *(bufferPtr++);
ditherBuffer[0][i * 8 + n * 2] = temp & 0xF0;
ditherBuffer[0][i * 8 + n * 2 + 1] = (temp & 0x0F) << 4;
if (invert) {
ditherBuffer[0][i * 8 + n * 2] = ~ditherBuffer[0][i * 8 + n * 2];
ditherBuffer[0][i * 8 + n * 2 + 1] = ~ditherBuffer[0][i * 8 + n * 2 + 1];
}
}
}
if (paddingBits)
{
uint32_t pixelRow = *(bufferPtr++) << 24 | *(bufferPtr++) << 16 | *(bufferPtr++) << 8 | *(bufferPtr++);
if (invert)
pixelRow = ~pixelRow;
for (int n = 0; n < paddingBits; n++)
{
ditherBuffer[1][_w * 8 + n] = (pixelRow & (0xFULL << (28 - n * 4))) >> (28 - n * 4 - 4);
}
}
}
}
//Gets specific pixel, mainly at i, j is just used for bound checking when changing next line values
@ -1351,7 +1438,7 @@ int Inkplate::drawMonochromeBitmapWeb(WiFiClient *s, struct bitmapHeader bmpHead
return 1;
}
int Inkplate::drawGrayscaleBitmap4Web(WiFiClient *s, struct bitmapHeader bmpHeader, int x, int y, int len, bool invert)
int Inkplate::drawGrayscaleBitmap4Web(WiFiClient *s, struct bitmapHeader bmpHeader, int x, int y, int len, bool dither, bool invert)
{
int w = bmpHeader.width;
int h = bmpHeader.height;
@ -1375,12 +1462,40 @@ int Inkplate::drawGrayscaleBitmap4Web(WiFiClient *s, struct bitmapHeader bmpHead
}
}
int i, j, k = bmpHeader.startRAW - 34;
int i, j;
uint8_t *bufferPtr;
uint8_t *f_pointer = buf + (bmpHeader.startRAW - 34);
if (dither) {
bufferPtr = pixelBuffer;
for (i = 0; i < w * 4 + (paddingBits? 1 : 0); i++)
pixelBuffer[i] = *(f_pointer++);
ditherStart(pixelBuffer, bufferPtr, w, invert, 4);
}
for (j = 0; j < h; j++)
{
bufferPtr = pixelBuffer;
for (i = 0; i < w * 4 + (paddingBits? 1 : 0); i++)
pixelBuffer[i] = *(f_pointer++);
if (dither && j != h - 1) {
ditherLoadNextLine(pixelBuffer, bufferPtr, w * 8 + (paddingBits? 4 : 0), invert, 4);
}
for (i = 0; i < w; i++)
{
uint32_t pixelRow = buf[k++] << 24 | buf[k++] << 16 | buf[k++] << 8 | buf[k++];
if (dither) {
for (int n = 0; n < 8; n++)
{
drawPixel((i * 8) + n + x, h - 1 - j + y, ditherGetPixel((i * 8) + n, h - 1 - j, w * 8 + (paddingBits? 4 : 0), h) >> 5);
}
}
else {
uint32_t pixelRow = *(bufferPtr++) << 24 | *(bufferPtr++) << 16 | *(bufferPtr++) << 8 | *(bufferPtr++);
if (invert)
pixelRow = ~pixelRow;
for (int n = 0; n < 8; n++)
@ -1388,9 +1503,17 @@ int Inkplate::drawGrayscaleBitmap4Web(WiFiClient *s, struct bitmapHeader bmpHead
drawPixel((i * 8) + n + x, h - 1 - j + y, (pixelRow & (0xFULL << (28 - n * 4))) >> (28 - n * 4 + 1));
}
}
}
if (paddingBits)
{
uint32_t pixelRow = buf[k++] << 24 | buf[k++] << 16 | buf[k++] << 8 | buf[k++];
if (dither) {
for (int n = 0; n < paddingBits; n++)
{
drawPixel((i * 8) + n + x, h - 1 - j + y, ditherGetPixel((i * 8) + n, h - 1 - j, w * 8 + (paddingBits? 4 : 0), h) >> 5);
}
}
else {
uint32_t pixelRow = *(bufferPtr++) << 24 | *(bufferPtr++) << 16 | *(bufferPtr++) << 8 | *(bufferPtr++);
if (invert)
pixelRow = ~pixelRow;
for (int n = 0; n < paddingBits; n++)
@ -1399,6 +1522,9 @@ int Inkplate::drawGrayscaleBitmap4Web(WiFiClient *s, struct bitmapHeader bmpHead
}
}
}
if (dither)
ditherSwap(w * 8 + paddingBits);
}
free(buf);

4
Inkplate.h
View File

@ -245,11 +245,11 @@ private:
void readBmpHeaderSd(SdFile *_f, struct bitmapHeader *_h);
void readBmpHeaderWeb(WiFiClient *_s, struct bitmapHeader *_h);
int drawMonochromeBitmapSd(SdFile *f, struct bitmapHeader bmpHeader, int x, int y, bool invert);
int drawGrayscaleBitmap4Sd(SdFile *f, struct bitmapHeader bmpHeader, int x, int y, bool invert);
int drawGrayscaleBitmap4Sd(SdFile *f, struct bitmapHeader bmpHeader, int x, int y, bool dither, bool invert);
int drawGrayscaleBitmap8Sd(SdFile *f, struct bitmapHeader bmpHeader, int x, int y, bool dither, bool invert);
int drawGrayscaleBitmap24Sd(SdFile *f, struct bitmapHeader bmpHeader, int x, int y, bool dither, bool invert);
int drawMonochromeBitmapWeb(WiFiClient *s, struct bitmapHeader bmpHeader, int x, int y, int len, bool invert);
int drawGrayscaleBitmap4Web(WiFiClient *s, struct bitmapHeader bmpHeader, int x, int y, int len, bool invert);
int drawGrayscaleBitmap4Web(WiFiClient *s, struct bitmapHeader bmpHeader, int x, int y, int len, bool dither, bool invert);
int drawGrayscaleBitmap8Web(WiFiClient *s, struct bitmapHeader bmpHeader, int x, int y, int len, bool dither, bool invert);
int drawGrayscaleBitmap24Web(WiFiClient *s, struct bitmapHeader bmpHeader, int x, int y, int len, bool dither, bool invert);
void precalculateGamma(uint8_t *c, float gamma);