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inkplate-6-arduino-library
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Add invert parameter to drawBitmapFromSD, update examples.

This commit is contained in:
Thorinair 2020-07-27 14:23:41 +02:00
parent 97e5bea90e
commit f7bcef3b8f
4 changed files with 35 additions and 26 deletions
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38
Inkplate.cpp
View File

@ -330,7 +330,7 @@ uint8_t Inkplate::getDisplayMode() {
return _displayMode;
}
int Inkplate::drawBitmapFromSD(SdFile* p, int x, int y) {
int Inkplate::drawBitmapFromSD(SdFile* p, int x, int y, bool invert) {
if(sdCardOk == 0) return 0;
struct bitmapHeader bmpHeader;
readBmpHeaderSd(p, &bmpHeader);
@ -344,17 +344,17 @@ int Inkplate::drawBitmapFromSD(SdFile* p, int x, int y) {
selectDisplayMode(INKPLATE_1BIT);
}
if (bmpHeader.color == 1) drawMonochromeBitmapSd(p, bmpHeader, x, y);
if (bmpHeader.color == 24) drawGrayscaleBitmap24Sd(p, bmpHeader, x, y);
if (bmpHeader.color == 1) drawMonochromeBitmapSd(p, bmpHeader, x, y, invert);
if (bmpHeader.color == 24) drawGrayscaleBitmap24Sd(p, bmpHeader, x, y, invert);
return 1;
}
int Inkplate::drawBitmapFromSD(char* fileName, int x, int y) {
int Inkplate::drawBitmapFromSD(char* fileName, int x, int y, bool invert) {
if(sdCardOk == 0) return 0;
SdFile dat;
if (dat.open(fileName, O_RDONLY)) {
return drawBitmapFromSD(&dat, x, y);
return drawBitmapFromSD(&dat, x, y, invert);
} else {
return 0;
}
@ -844,7 +844,7 @@ void Inkplate::readBmpHeaderWeb(WiFiClient *_s, struct bitmapHeader *_h) {
return;
}
int Inkplate::drawMonochromeBitmapSd(SdFile *f, struct bitmapHeader bmpHeader, int x, int y) {
int Inkplate::drawMonochromeBitmapSd(SdFile *f, struct bitmapHeader bmpHeader, int x, int y, bool invert) {
int w = bmpHeader.width;
int h = bmpHeader.height;
uint8_t paddingBits = w % 32;
@ -855,12 +855,16 @@ int Inkplate::drawMonochromeBitmapSd(SdFile *f, struct bitmapHeader bmpHeader, i
for (j = 0; j < h; j++) {
for (i = 0; i < w; i++) {
uint32_t pixelRow = f->read() << 24 | f->read() << 16 | f->read() << 8 | f->read();
if (invert)
pixelRow = ~pixelRow;
for (int n = 0; n < 32; n++) {
drawPixel((i * 32) + n + x, h - 1 - j + y, !(pixelRow & (1ULL << (31 - n))));
}
}
if (paddingBits) {
uint32_t pixelRow = f->read() << 24 | f->read() << 16 | f->read() << 8 | f->read();
if (invert)
pixelRow = ~pixelRow;
for (int n = 0; n < paddingBits; n++) {
drawPixel((i * 32) + n + x, h - 1 - j + y, !(pixelRow & (1ULL << (31 - n))));
}
@ -870,7 +874,7 @@ int Inkplate::drawMonochromeBitmapSd(SdFile *f, struct bitmapHeader bmpHeader, i
return 1;
}
int Inkplate::drawGrayscaleBitmap24Sd(SdFile *f, struct bitmapHeader bmpHeader, int x, int y) {
int Inkplate::drawGrayscaleBitmap24Sd(SdFile *f, struct bitmapHeader bmpHeader, int x, int y, bool invert) {
int w = bmpHeader.width;
int h = bmpHeader.height;
char padding = w % 4;
@ -884,7 +888,11 @@ int Inkplate::drawGrayscaleBitmap24Sd(SdFile *f, struct bitmapHeader bmpHeader,
//display.drawPixel(i + x, h - j + y, (uint8_t)(px*7));
//So then, we are convertng it to grayscale using good old average and gamma correction (from LUT). With this metod, it is still slow (full size image takes 4 seconds), but much beter than prev mentioned method.
uint8_t px = (f->read() * 2126 / 10000) + (f->read() * 7152 / 10000) + (f->read() * 722 / 10000);
uint8_t px = 0;
if (invert)
px = ((255-f->read()) * 2126 / 10000) + ((255-f->read()) * 7152 / 10000) + ((255-f->read()) * 722 / 10000);
else
px = (f->read() * 2126 / 10000) + (f->read() * 7152 / 10000) + (f->read() * 722 / 10000);
//drawPixel(i + x, h - j + y, gammaLUT[px]);
drawPixel(i + x, h - 1 - j + y, px>>5);
//drawPixel(i + x, h - j + y, px/32);
@ -976,21 +984,17 @@ int Inkplate::drawGrayscaleBitmap24Web(WiFiClient *s, struct bitmapHeader bmpHea
int i, j, k = bmpHeader.startRAW - 34;
for (j = 0; j < h; j++) {
for (i = 0; i < w; i++) {
uint8_t r = buf[k++];
uint8_t g = buf[k++];
uint8_t b = buf[k++];
if (invert) {
r = 255 - r;
g = 255 - g;
b = 255 - b;
}
//This is the proper way of converting True Color (24 Bit RGB) bitmap file into grayscale, but it takes waaay too much time (full size picture takes about 17s to decode!)
//float px = (0.2126 * (readByteFromSD(&file) / 255.0)) + (0.7152 * (readByteFromSD(&file) / 255.0)) + (0.0722 * (readByteFromSD(&file) / 255.0));
//px = pow(px, 1.5);
//display.drawPixel(i + x, h - j + y, (uint8_t)(px*7));
//So then, we are convertng it to grayscale using good old average and gamma correction (from LUT). With this metod, it is still slow (full size image takes 4 seconds), but much beter than prev mentioned method.
uint8_t px = (r * 2126 / 10000) + (g * 7152 / 10000) + (b * 722 / 10000);
uint8_t px = 0;
if (invert)
px = ((255-buf[k++]) * 2126 / 10000) + ((255-buf[k++]) * 7152 / 10000) + ((255-buf[k++]) * 722 / 10000);
else
px = (buf[k++] * 2126 / 10000) + (buf[k++] * 7152 / 10000) + (buf[k++] * 722 / 10000);
//drawPixel(i + x, h - j + y, gammaLUT[px]);
drawPixel(i + x, h - 1 - j + y, px>>5);
//drawPixel(i + x, h - j + y, px/32);

8
Inkplate.h
View File

@ -131,8 +131,8 @@ class Inkplate : public Adafruit_GFX {
void einkOn(void);
void selectDisplayMode(uint8_t _mode);
uint8_t getDisplayMode();
int drawBitmapFromSD(SdFile* p, int x, int y);
int drawBitmapFromSD(char* fileName, int x, int y);
int drawBitmapFromSD(SdFile* p, int x, int y, bool invert = false);
int drawBitmapFromSD(char* fileName, int x, int y, bool invert = false);
int drawBitmapFromWeb(WiFiClient* s, int x, int y, int len, bool invert = false);
int drawBitmapFromWeb(char* url, int x, int y, bool invert = false);
int sdCardInit();
@ -168,8 +168,8 @@ class Inkplate : public Adafruit_GFX {
uint16_t read16(uint8_t* c);
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);
int drawGrayscaleBitmap24Sd(SdFile *f, struct bitmapHeader bmpHeader, int x, int y);
int drawMonochromeBitmapSd(SdFile *f, struct bitmapHeader bmpHeader, int x, int y, bool invert);
int drawGrayscaleBitmap24Sd(SdFile *f, struct bitmapHeader bmpHeader, int x, int y, bool invert);
int drawMonochromeBitmapWeb(WiFiClient *s, struct bitmapHeader bmpHeader, int x, int y, int len, bool invert);
int drawGrayscaleBitmap24Web(WiFiClient *s, struct bitmapHeader bmpHeader, int x, int y, int len, bool invert);
void precalculateGamma(uint8_t* c, float gamma);

4
examples/2. Advanced Inkplate Features/10-Inkplate_Download_And_Show/10-Inkplate_Download_And_Show.ino
View File

@ -49,7 +49,9 @@ void setup() {
//Draw the first image from web.
//Monochromatic bitmap with 1 bit depth. Images like this load quickest.
//The parameter set to true at the end may be used to swap the black and white channels.
//NOTE: Both drawBitmapFromWeb methods allow for an optional fourth "invert" parameter. Setting this parameter to true
//will flip all colors on the image, making black white and white black. This may be necessary when exporting bitmaps from
//certain softwares.
//Photo taken by: Roberto Fernandez
if(!display.drawBitmapFromWeb("https://varipass.org/neowise_mono.bmp", 0, 0, true)) {
//If is something failed (wrong filename or wrong bitmap format), write error message on the screen.

3
examples/2. Advanced Inkplate Features/5-Inkplate_SD_BMP_pictures/5-Inkplate_SD_BMP_pictures.ino
View File

@ -36,6 +36,9 @@ void setup() {
display.partialUpdate();
//If card is properly init, try to load image and display it on e-paper at position X=0, Y=0
//NOTE: Both drawBitmapFromSD methods allow for an optional fourth "invert" parameter. Setting this parameter to true
//will flip all colors on the image, making black white and white black. This may be necessary when exporting bitmaps from
//certain softwares.
if(!display.drawBitmapFromSD("image1.bmp", 0, 0)) {
//If is something failed (wrong filename or wrong bitmap format), write error message on the screen.
//REMEMBER! You can only use Windows Bitmap file with color depth of 1 or 24 bits with no compression!