EmbeddedArtists AB
/
app_lcdboard_demo_mandelbrot
Example for the LPC4088 QSB Base Board
Graphics.cpp
- Committer:
- embeddedartists
- Date:
- 2014-04-09
- Revision:
- 1:b00a5c2416a7
- Parent:
- 0:7ce952ea2c4c
File content as of revision 1:b00a5c2416a7:
#include "mbed.h" #include "Graphics.h" Graphics::Graphics(uint16_t *pFrmBuf, uint16_t dispWidth, uint16_t dispHeight) { this->windowX = dispWidth; this->windowY = dispHeight; this->pFrmBuf = pFrmBuf; } void Graphics::setFrameBuffer( uint16_t *pFrmBuf ) { this->pFrmBuf = pFrmBuf; } int32_t Graphics::abs(int32_t v1) const { if (v1 > 0) return v1; return -v1; } /*********************************************************************** * * Function: swim_put_line_raw * * Purpose: Draw a line on the physical display * * Processing: * See function. * * Parameters: * win : Window identifier * x1 : Physical X position of X line start * y1 : Physical Y position of Y line start * x2 : Physical X position of X line end * y2 : Physical Y position of Y line end * * Outputs: None * * Returns: Nothing * * Notes: None * **********************************************************************/ void Graphics::put_line(int32_t x1, int32_t y1, int32_t x2, int32_t y2, int16_t color) { int32_t e2, sx, sy, dx, dy, err; /* calculate delta_x and delta_y */ dx = abs(x2 - x1); dy = abs(y2 - y1); /* set the direction for the step for both x and y, and initialize the error */ if (x1 < x2) sx = 1; else sx = -1; if (y1 < y2) sy = 1; else sy = -1; err = dx - dy; while (1) { if ((x1 >= 0) && (x1 < this->windowX) && (y1 >= 0) && (y1 < this->windowY)) this->pFrmBuf[x1 + (this->windowX*y1)] = color; if ((x1 == x2) && (y1 == y2)) return; e2 = 2 * err; if (e2 > -dy) { err -= dy; x1 += sx; } if (e2 < dx) { err += dx; y1 += sy; } } } /*********************************************************************** * * Function: plot4points * * Purpose: * * Processing: * See function. * * Parameters: * win : Window identifier * cx : * cy : * x : * y : * Filled : * * Outputs: None * * Returns: Nothing * * Notes: None * **********************************************************************/ void Graphics::plot4points( int32_t cx, int32_t cy, int32_t x, int32_t y, int16_t color, int32_t Filled ) { int16_t x0, x1, y0, y1; y0 = cy + y; y1 = cy - y; if( Filled ) { for( x0=cx - x; x0<=cx + x; x0++ ) { if ((x0>=0) && (x0<this->windowX) && (y0>=0) && (y0<this->windowY)) this->pFrmBuf[x0 + (this->windowX*y0)] = color; if ((x0>=0) && (x0<this->windowX) && (y1>=0) && (y1<this->windowY)) this->pFrmBuf[x0 + (this->windowX*y1)] = color; } } else { x0 = cx + x; x1 = cx - x; if ((x0>=0) && (x0<this->windowX) && (y0>=0) && (y0<this->windowY)) this->pFrmBuf[x0 + (this->windowX*y0)] = color; if ((x != 0) && (x1>=0) && (x1<this->windowX) && (y0>=0) && (y0<this->windowY)) this->pFrmBuf[x1 + (this->windowX*y0)] = color; if ((y != 0) && (x0>=0) && (x0<this->windowX) && (y1>=0) && (y1<this->windowY)) this->pFrmBuf[x0 + (this->windowX*y1)] = color; if ((x != 0 && y != 0) && (x1>=0) && (x1<this->windowX) && (y1>=0) && (y1<this->windowY)) this->pFrmBuf[x1 + (this->windowX*y1)] = color; } } /*********************************************************************** * * Function: plot8points * * Purpose: * * Processing: * See function. * * Parameters: * win : Window identifier * cx : * cy : * x : * y : * Filled : * * Outputs: None * * Returns: Nothing * * Notes: None * **********************************************************************/ void Graphics::plot8points( int32_t cx, int32_t cy, int32_t x, int32_t y, int16_t color, int32_t Filled ) { plot4points( cx, cy, x, y, color, Filled ); if (x != y) plot4points( cx, cy, y, x, color, Filled ); } /*********************************************************************** * * Function: swim_put_circle * * Purpose: * * Processing: * See function. * * Parameters: * win : Window identifier * cx : * cy : * radius : * Filled : * * Outputs: None * * Returns: Nothing * * Notes: None * **********************************************************************/ void Graphics::put_circle( int32_t cx, int32_t cy, int16_t color, int32_t radius, int32_t Filled ) { int32_t Error = -radius; int16_t x = radius; int16_t y = 0; while( x >= y ) { plot8points( cx, cy, x, y, color, Filled ); Error += y; ++y; Error += y; if( Error >= 0 ) { --x; Error -= x; Error -= x; } } }