1 files changed, 153 insertions, 0 deletions
diff --git a/api.cpp b/api.cpp
new file mode 100644
index 0000000..2d63506
--- /dev/null
+++ b/api.cpp
@@ -0,0 +1,153 @@
+#include <stdio.h>
+#include "pico/stdlib.h"
+extern "C" {
+#include "hardware/rtc.h"
+}
+
+#include "api.hpp"
+#include "init.hpp"
+
+void Api::init() {
+    if (!m_init_done) {
+        init_display();
+        m_init_done = 1;
+    }
+}
+
+void Api::init_display() {
+    oledInit(&m_oled, OLED_128x64, 0x3d, 0, 0, 1, SDA_PIN, SCL_PIN, RESET_PIN, 1000000L);
+    oledFill(&m_oled, 0,1);
+    oledSetContrast(&m_oled, OLED_DEFAULT_CONTRAST);
+    oledSetBackBuffer(&m_oled, m_ucBuffer); // Seems to be required to draw lines, rectangles…
+    //oledSetTextWrap(&oled, true);
+}
+
+int Api::display_write_string(int iScrollX, int x, int y, char *szMsg, int iSize, int bInvert, int bRender) {
+    return oledWriteString(&m_oled, iScrollX, x, y, szMsg, iSize, bInvert, bRender);
+}
+
+void Api::display_fill(unsigned char ucData, int bRender) {
+    oledFill(&m_oled, ucData, bRender);
+}
+
+void Api::display_draw_line(int x1, int y1, int x2, int y2, int bRender) {
+    oledDrawLine(&m_oled, x1, y1, x2, y2, bRender);
+}
+
+void Api::display_draw_rectange(int x1, int y1, int x2, int y2, uint8_t ucColor, uint8_t bFilled) {
+    oledRectangle(&m_oled, x1, y1, x2, y2, ucColor, bFilled);
+    oledDumpBuffer(&m_oled, m_ucBuffer); // Write the back buffer, after experimentation, seems to be required when drawing this shape
+}
+
+void Api::display_draw_ellipse(int iCenterX, int iCenterY, int32_t iRadiusX, int32_t iRadiusY, uint8_t ucColor, uint8_t bFilled) {
+    oledEllipse(&m_oled, iCenterX, iCenterY, iRadiusX, iRadiusY, ucColor, bFilled);
+    oledDumpBuffer(&m_oled, m_ucBuffer);
+}
+
+void Api::display_write_buffer(uint8_t *pBuffer) {
+    oledDumpBuffer(&m_oled, pBuffer);
+}
+
+int Api::display_write_pixel(int x, int y, unsigned char ucColor, int bRender) {
+    return oledSetPixel(&m_oled, x, y, ucColor, bRender);
+}
+
+bool Api::gui_popup_text(std::string title, std::string body){
+#define CHARS_PER_LINE 13
+    m_button_last_pressed = 0;
+    m_send_button_press_to_app = false;
+
+    oledRectangle(&m_oled, 9,7, 119,63, 0, 1); // Background
+    oledRectangle(&m_oled, 9,7, 119,63, 1, 0); // Popup border
+    oledRectangle(&m_oled, 9,7, 119,16, 1, 1); // Title background, FIXME pixel bleeding
+    oledDumpBuffer(&m_oled, m_ucBuffer); // Display rectangle
+
+    // Truncate longer strings to avoid wasting time in for loop and drawing on OLED
+    if (title.size() > 13)
+        title.resize(13);
+    if (body.size() > 78)
+        body.resize(78);
+
+    // Make body fit by adding '\n' at a regular interval
+    int since_nl = 0; // Characters since newline
+    for (std::string::size_type i = 0; i < body.size(); ++i) {
+        if (body[i] == '\n')
+            since_nl = 0;
+        else if (since_nl++ == CHARS_PER_LINE) {
+            body.insert(i, 1, '\n');
+            since_nl = 0; // Probably unneeded
+        }
+    }
+    // See https://stackoverflow.com/questions/1986966/does-s0-point-to-contiguous-characters-in-a-stdstring
+    oledWriteString(&m_oled, 0, 15,1, &title[0], FONT_8x8, 1, 1); // Draw title
+    oledWriteString(&m_oled, 0, 13,2, &body[0], FONT_8x8, 0, 1); // Draw body
+    while (m_button_last_pressed != BUTTON_SELECT)
+        sleep_ms(50);
+    // Give back control to running app
+    oledFill(&m_oled, 0, 1);
+    m_send_button_press_to_app = true;
+}
+
+bool Api::gui_footer_text(std::string text, int offset_x, int offset_row, int invert) {
+    // Max chars per line for FONT_8x8 is 16 chars
+    // Max chars per line for FONT_6x8 is 21 chars
+    // Truncate longer text
+    if (text.size() > 21)
+        text.resize(21);
+    
+    // Choose most adapted font size
+    int font;
+    if (text.size() > 16)
+        font = FONT_6x8;
+    else
+        font = FONT_8x8;
+    
+    oledRectangle(&m_oled, 0,56, 128,64, invert, 1);
+    oledDumpBuffer(&m_oled, m_ucBuffer);
+    oledWriteString(&m_oled, 0,offset_x,7-offset_row, &text[0], font, invert, 1);
+}
+
+bool Api::gui_header_text(std::string text, int offset_x, int offset_row, int invert) {
+    // Max chars per line for FONT_8x8 is 16 chars
+    // Max chars per line for FONT_6x8 is 21 chars
+    // Truncate longer text
+    if (text.size() > 21)
+        text.resize(21);
+    
+    // Choose most adapted font size
+    int font;
+    if (text.size() > 16)
+        font = FONT_6x8;
+    else
+        font = FONT_8x8;
+    
+    oledRectangle(&m_oled, 0,0, 128,8, invert, 1);
+    oledDumpBuffer(&m_oled, m_ucBuffer);
+    oledWriteString(&m_oled, 0,offset_x,0+offset_row, &text[0], font, invert, 1);
+}
+
+bool Api::performance_set(int perf) {
+    return false;
+}
+
+bool Api::datetime_get(datetime_t *t) {
+    return rtc_get_datetime(t);
+}
+
+int Api::performance_render_interval_get() {
+    return m_app_render_interval;
+}
+
+void Api::performance_render_interval_set(int interval) {
+    if (interval < 10)
+        interval = 10;
+    m_app_render_interval = interval;
+}
+
+uint Api::button_last_get() {
+    return m_button_last_pressed;
+}
+
+void Api::button_last_set(uint gpio) {
+    m_button_last_pressed = gpio;
+}