src/FcUI_Raster_Line.h - master - vTech/FcApps

src/FcUI_Raster_Line.h
107 строк2 KB
vTech
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03 дек 2025, 17:45
03 дек 2025, 17:45ab8382d
#ifndef _FCUI_RASTER_LINE_H_
#define _FCUI_RASTER_LINE_H_

#include "FcUI_Error.h"
#include "FcUI_Setting.h"

FCUIDEF void FcUI_Raster_Line_2t(uint8_t(*mImage)[4],
	size_t width, size_t height,
	ptrdiff_t x0, ptrdiff_t y0,
	ptrdiff_t x1, ptrdiff_t y1,
	const uint8_t mDefaultColor[4]);

FCUIDEF size_t FcUI_Algo_Raster_line_Bresenham_numberPoints(ptrdiff_t x0, ptrdiff_t y0, ptrdiff_t x1, ptrdiff_t y1);
FCUIDEF size_t FcUI_Algo_Raster_line_Bresenham_f(float (*pVertex)[2], size_t vertexLength, ptrdiff_t x0, ptrdiff_t y0, ptrdiff_t x1, ptrdiff_t y1);



FCUIDEF void FcUI_Raster_Line_2t(uint8_t(*mImage)[4],
	size_t width, size_t height,
	ptrdiff_t x0, ptrdiff_t y0,
	ptrdiff_t x1, ptrdiff_t y1,
	const uint8_t mDefaultColor[4]) {
	ptrdiff_t mDy, mSx, mDx, mSy, mError, mTmp;
	size_t i, j;
	mSx = x0 < x1 ? 1 : -1;
	mSy = y0 < y1 ? 1 : -1;
	mDx = mSx * (x1 - x0);
	mDy = mSy * (y1 - y0);
	mError = mDx - mDy;
	while (!(x0 == x1 && y0 == y1)) {
		i = y0;
		j = x0;
		if ((i < height) && (j < width)) {
			j = i * width + j;
			mImage[j][0] = mDefaultColor[0];
			mImage[j][1] = mDefaultColor[1];
			mImage[j][2] = mDefaultColor[2];
			mImage[j][3] = mDefaultColor[3];
		}

		mTmp = 2 * mError;
		if (mTmp >= -mDy) {
			mError -= mDy;
			x0 += mSx;
		}
		if (mTmp <= mDx) {
			mError += mDx;
			y0 += mSy;
		}
	}
}

FCUIDEF size_t FcUI_Algo_Raster_line_Bresenham_numberPoints(ptrdiff_t x0, ptrdiff_t y0,	ptrdiff_t x1, ptrdiff_t y1) {
	ptrdiff_t mDy, mSx, mDx, mSy, mError, mTmp, mCounter;
	size_t i, j;
	mCounter = 0;
	mSx = x0 < x1 ? 1 : -1;
	mSy = y0 < y1 ? 1 : -1;
	mDx = mSx * (x1 - x0);
	mDy = mSy * (y1 - y0);
	mError = mDx - mDy;
	while (!(x0 == x1 && y0 == y1)) {
		i = y0;
		j = x0;
		mCounter++;

		mTmp = 2 * mError;
		if (mTmp >= -mDy) {
			mError -= mDy;
			x0 += mSx;
		}
		if (mTmp <= mDx) {
			mError += mDx;
			y0 += mSy;
		}
	}
	return mCounter;
}

FCUIDEF size_t FcUI_Algo_Raster_line_Bresenham_f(float (*pVertex)[2], size_t vertexLength, ptrdiff_t x0, ptrdiff_t y0, ptrdiff_t x1, ptrdiff_t y1) {
	ptrdiff_t mDy, mSx, mDx, mSy, mError, mTmp;
	size_t id;
	id = 0;
	mSx = x0 < x1 ? 1 : -1;
	mSy = y0 < y1 ? 1 : -1;
	mDx = mSx * (x1 - x0);
	mDy = mSy * (y1 - y0);
	mError = mDx - mDy;
	while (!(x0 == x1 && y0 == y1)) {
		if (id < vertexLength) {
			pVertex[id][0] = x0;
			pVertex[id][1] = y0;
		}
		id++;
		mTmp = 2 * mError;
		if (mTmp >= -mDy) {
			mError -= mDy;
			x0 += mSx;
		}
		if (mTmp <= mDx) {
			mError += mDx;
			y0 += mSy;
		}
	}
	return id;
}
#endif //_FCUI_RASTER_LINE_H_