DigitalInfinity/ESP32-PaxCounter
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curve plotter fixes

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This commit is contained in:
Verkehrsrot 2019-10-05 13:12:58 +02:00
parent c37db3d4d3
commit 36d9b3dedb
2 changed files with 51 additions and 42 deletions
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6
include/display.h
View File

@ -14,8 +14,10 @@ void dp_printf(uint16_t x, uint16_t y, uint8_t font, uint8_t inv,
void dp_printqr(uint16_t offset_x, uint16_t offset_y, const char *Message);
void oledfillRect(uint16_t x, uint16_t y, uint16_t width, uint16_t height,
uint8_t bRender);
void oledScrollBufferLeft(uint8_t *buf, const uint16_t width,
const uint16_t height);
void oledScrollBufferHorizontal(uint8_t *buf, const uint16_t width,
const uint16_t height, bool left = true);
void oledScrollBufferVertical(uint8_t *buf, const uint16_t width,
const uint16_t height, int offset = 0);
int oledDrawPixel(uint8_t *buf, const uint16_t x, const uint16_t y,
const uint8_t dot);
void oledPlotCurve(uint16_t count, bool reset);

79
src/display.cpp
View File

@ -409,24 +409,55 @@ int oledDrawPixel(uint8_t *buf, const uint16_t x, const uint16_t y,
return 0;
}
void oledScrollBufferLeft(uint8_t *buf, const uint16_t width,
const uint16_t height) {
void oledScrollBufferHorizontal(uint8_t *buf, const uint16_t width,
const uint16_t height, bool left) {
uint16_t col, page, idx;
for (page = 0; page < height / 8; page++) {
if (left) { // scroll left
for (col = 0; col < width - 1; col++) {
idx = page * width + col;
buf[idx] = buf[idx + 1];
}
buf[idx + 1] = 0;
} else // scroll right
{
for (col = width - 1; col > 0; col--) {
idx = page * width + col;
buf[idx] = buf[idx - 1];
}
buf[idx - 1] = 0;
}
}
}
void oledScrollBufferVertical(uint8_t *buf, const uint16_t width,
const uint16_t height, int offset) {
uint64_t buf_col;
if (!offset)
return; // nothing to do
for (uint16_t col = 0; col < DISPLAY_WIDTH; col++) {
// convert column bytes from display buffer to uint64_t
buf_col = *(uint64_t *)&buf[col * DISPLAY_HEIGHT / 8];
if (offset > 0) // scroll up
buf_col >= abs(offset);
else // scroll down
buf_col <= offset;
// write back uint64_t to uint8_t display buffer
*(uint64_t *)&buf[col * DISPLAY_HEIGHT / 8] = buf_col;
}
}
void oledPlotCurve(uint16_t count, bool reset) {
static uint16_t last_count = 0, col = 0, row = 0;
static int scalefactor = 1, oldsf = 1;
uint16_t v_scroll = 0;
if ((last_count == count) && !reset)
return;
@ -435,47 +466,23 @@ void oledPlotCurve(uint16_t count, bool reset) {
if (col < DISPLAY_WIDTH - 1) // matrix not full -> increment column
col++;
else // matrix full -> scroll left 1 dot
oledScrollBufferLeft(displaybuf, DISPLAY_WIDTH, DISPLAY_HEIGHT);
oledScrollBufferHorizontal(displaybuf, DISPLAY_WIDTH, DISPLAY_HEIGHT,
true);
} else // clear current dot
oledDrawPixel(displaybuf, col, row, 0);
// re-scale, if necessary
oldsf = scalefactor;
while (((count / scalefactor) <= DISPLAY_HEIGHT) && (scalefactor > 1))
scalefactor--;
while ((count / scalefactor) > DISPLAY_HEIGHT)
scalefactor++;
if (scalefactor != oldsf)
oledRescaleBuffer(displaybuf, scalefactor);
// scroll up vertical, if necessary
while ((count - v_scroll) > DISPLAY_HEIGHT - 1)
v_scroll++;
if (v_scroll)
oledScrollBufferVertical(displaybuf, DISPLAY_WIDTH, DISPLAY_HEIGHT,
v_scroll);
// set new dot
row = DISPLAY_HEIGHT - 1 - (count / scalefactor) % DISPLAY_HEIGHT;
row = DISPLAY_HEIGHT - 1 - (count - v_scroll) % DISPLAY_HEIGHT;
last_count = count;
oledDrawPixel(displaybuf, col, row, 1);
}
void oledRescaleBuffer(uint8_t *buf, const int factor) {
if (!factor)
return;
uint64_t buf_col;
for (uint16_t col = 0; col < DISPLAY_WIDTH; col++) {
// convert column bytes from display buffer to uint64_t
buf_col = *(uint64_t *)&buf[col * DISPLAY_HEIGHT / 8];
if (factor < 0)
// shift left: scroll up = scale down
buf_col <= abs(factor);
else
// shift right: scroll down = scale up
buf_col >= abs(factor);
// write back uint64_t to uint8_t display buffer
*(uint64_t *)&buf[col * DISPLAY_HEIGHT / 8] = buf_col;
}
}
#endif // HAS_DISPLAY