- Generated on Sun May 22 2022 11:19:46 for FabGL by
1.9.3
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FabGL
ESP32 Display Controller and Graphics Library
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A class with a set of drawing methods. More...
#include <canvas.h>
Public Member Functions | |
| void | beginUpdate () |
| Suspends drawings. More... | |
| void | clear () |
| Fills the entire canvas with the brush color. More... | |
| void | copyRect (int sourceX, int sourceY, int destX, int destY, int width, int height) |
| Copies a screen rectangle to the specified position. More... | |
| void | drawBitmap (int X, int Y, Bitmap const *bitmap) |
| Draws a bitmap at specified position. More... | |
| void | drawChar (int X, int Y, char c) |
| Draws a character at specified position. More... | |
| void | drawEllipse (int X, int Y, int width, int height) |
| Draws an ellipse specifying center and size, using current pen color. More... | |
| void | drawGlyph (int X, int Y, int width, int height, uint8_t const *data, int index=0) |
| Draws a glyph at specified position. More... | |
| void | drawLine (int X1, int Y1, int X2, int Y2) |
| Draws a line specifying initial and ending coordinates. More... | |
| void | drawPath (Point const *points, int pointsCount) |
| Draws a sequence of lines. More... | |
| void | drawRectangle (int X1, int Y1, int X2, int Y2) |
| Draws a rectangle using the current pen color. More... | |
| void | drawRectangle (Rect const &rect) |
| Draws a rectangle using the current pen color. More... | |
| void | drawText (FontInfo const *fontInfo, int X, int Y, char const *text, bool wrap=false) |
| Draws a string at specified position. More... | |
| void | drawText (int X, int Y, char const *text, bool wrap=false) |
| Draws a string at specified position. More... | |
| void | drawTextFmt (int X, int Y, const char *format,...) |
| Draws formatted text at specified position. More... | |
| void | drawTextWithEllipsis (FontInfo const *fontInfo, int X, int Y, char const *text, int maxX) |
| Draws a string at specified position. Add ellipses before truncation. More... | |
| void | endUpdate () |
| Resumes drawings after beginUpdate(). More... | |
| void | fillEllipse (int X, int Y, int width, int height) |
| Fills an ellipse specifying center and size, using current brush color. More... | |
| void | fillPath (Point const *points, int pointsCount) |
| Fills the polygon enclosed in a sequence of lines. More... | |
| void | fillRectangle (int X1, int Y1, int X2, int Y2) |
| Fills a rectangle using the current brush color. More... | |
| void | fillRectangle (Rect const &rect) |
| Fills a rectangle using the current brush color. More... | |
| Rect | getClippingRect () |
| Gets last clipping rectangle set using setClippingRect(). More... | |
| FontInfo const * | getFontInfo () |
| Gets info about currently selected font. More... | |
| int | getHeight () |
| Determines the canvas height in pixels. More... | |
| Point | getOrigin () |
| Gets last origin set using setOrigin(). More... | |
| RGB888 | getPixel (int X, int Y) |
| Reads the pixel at specified position. More... | |
| int | getWidth () |
| Determines the canvas width in pixels. More... | |
| void | invertRectangle (int X1, int Y1, int X2, int Y2) |
| Inverts a rectangle. More... | |
| void | invertRectangle (Rect const &rect) |
| Inverts a rectangle. More... | |
| void | lineTo (int X, int Y) |
| Draws a line starting from current pen position. More... | |
| void | moveTo (int X, int Y) |
| Moves current pen position to the spcified coordinates. More... | |
| void | reset () |
| Resets paint state and other display controller settings. More... | |
| void | resetGlyphOptions () |
| Resets glyph options. More... | |
| void | resetPaintOptions () |
| Resets paint options. More... | |
| void | scroll (int offsetX, int offsetY) |
| Scrolls pixels horizontally and/or vertically. More... | |
| void | selectFont (FontInfo const *fontInfo) |
| Selects a font to use for the next text drawings. More... | |
| void | setBrushColor (Color color) |
| Sets brush (background) color using a color name. More... | |
| void | setBrushColor (RGB888 const &color) |
| Sets brush (background) color specifying color components. More... | |
| void | setBrushColor (uint8_t red, uint8_t green, uint8_t blue) |
| Sets brush (background) color specifying color components. More... | |
| void | setClippingRect (Rect const &rect) |
| Sets clipping rectangle relative to the origin. More... | |
| void | setGlyphOptions (GlyphOptions options) |
| Sets drawing options for the next glyphs. More... | |
| void | setLineEnds (LineEnds value) |
| Sets line ends shape. More... | |
| void | setOrigin (int X, int Y) |
| Sets the axes origin. More... | |
| void | setOrigin (Point const &origin) |
| Sets the axes origin. More... | |
| void | setPaintOptions (PaintOptions options) |
| Sets paint options. More... | |
| void | setPenColor (Color color) |
| Sets pen (foreground) color using a color name. More... | |
| void | setPenColor (RGB888 const &color) |
| Sets pen (foreground) color specifying color components. More... | |
| void | setPenColor (uint8_t red, uint8_t green, uint8_t blue) |
| Sets pen (foreground) color specifying color components. More... | |
| void | setPenWidth (int value) |
| Sets pen width for lines, rectangles and paths. More... | |
| void | setPixel (int X, int Y) |
| Fills a single pixel with the pen color. More... | |
| void | setPixel (int X, int Y, RGB888 const &color) |
| Fills a single pixel with the specified color. More... | |
| void | setPixel (Point const &pos, RGB888 const &color) |
| Fills a single pixel with the specified color. More... | |
| void | setScrollingRegion (int X1, int Y1, int X2, int Y2) |
| Defines the scrolling region. More... | |
| void | swapBuffers () |
| Swaps screen buffer when double buffering is enabled. More... | |
| void | swapRectangle (int X1, int Y1, int X2, int Y2) |
| Swaps pen and brush colors of the specified rectangle. More... | |
| int | textExtent (char const *text) |
| Calculates text extension in pixels. More... | |
| int | textExtent (FontInfo const *fontInfo, char const *text) |
| Calculates text extension in pixels. More... | |
| void | waitCompletion (bool waitVSync=true) |
| Waits for drawing queue to become empty. More... | |
A class with a set of drawing methods.
This class interfaces directly to the display controller and provides a set of primitives to paint lines, circles, etc. and to scroll regions, copy rectangles and draw glyphs.
For default origin is at the top left, starting from (0, 0) up to (Canvas Width - 1, Canvas Height - 1).
Example:
// Setup pins and resolution (5 GPIOs hence we have up to 8 colors) VGAController.begin(GPIO_NUM_22, GPIO_NUM_21, GPIO_NUM_19, GPIO_NUM_18, GPIO_NUM_5); VGAController.setResolution(VGA_640x350_70Hz); // Paint a green rectangle with red border fabgl::Canvas cv(&VGAController); cv.setPenColor(Color::BrightRed); cv.setBrushColor(Color::BrightGreen); cv.fillRectangle(0, 0, cv.getWidth() - 1, cv.getHeight() - 1); cv.drawRectangle(0, 0, cv.getWidth() - 1, cv.getHeight() - 1);
1.9.3