383 lines
8.6 KiB
C
383 lines
8.6 KiB
C
//游戏引擎图像绘制库
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#include "stdlib.h"
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#include "string.h"
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#include "spi.h"
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#include "lcd.h"
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#include "GameEngine.h"
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#include "GE_Draw.h"
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/**************************************** 显存 ****************************************/
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uint8_t GE_Draw_VRam[153600];
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/*****************************************************************************************/
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_ge_draw_pic_set ge_draw_pic_set;
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_ge_draw_mono_set ge_draw_mono_set;
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/**
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* @brief 初始化 GE_Draw
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*/
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void GE_Draw_Init(void)
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{
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//绘制图片设置
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ge_draw_pic_set.is_reverse = FALSE;
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ge_draw_pic_set.pos_mode = UP_LEFT;
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//绘制单色图设置
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ge_draw_mono_set.draw_mode = MONO_OR;
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ge_draw_mono_set.pos_mode = UP_LEFT;
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ge_draw_mono_set.mono_color = BLACK;
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ge_draw_mono_set.back_color = WHITE;
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GE_Draw_ClrAll(WHITE);
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}
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/**
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* @brief 刷新屏幕
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*/
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void GE_Draw_Disp(void)
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{
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LCD_SetWin(0, 0, LCD_WIDTH, LCD_HEIGHT);
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LCD_SendCmdDataBytes(LCD_CMD_RAMWR, GE_Draw_VRam, 153600);
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}
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/**
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* @brief 以指定颜色清屏
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* @param color: 颜色
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*/
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void GE_Draw_ClrAll(uint16_t color)
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{
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GE_Draw_Fill(0, 0, LCD_WIDTH, LCD_HEIGHT, color);
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}
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/**
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* @brief 以指定颜色填充矩形区域。填充速度较慢
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* @param x: 0~319
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* @param y: 0~239
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* @param width: 区域的宽
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* @param height: 区域的高
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* @param color: 颜色
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*/
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void GE_Draw_Fill(int16_t x, int16_t y, uint16_t width, uint16_t height, uint16_t color)
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{
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uint32_t point_num = width * height;
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int16_t x0 = x, y0 = y;
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for (uint32_t i = 0; i < point_num; i++)
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{
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GE_Draw_Point(x++, y, color);
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if (x == x0 + width)
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{
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y++;
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x = x0;
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}
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}
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}
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/**
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* @brief 在指定坐标绘指定颜色的点
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* @param x: 0~319
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* @param y: 0~239
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* @param color: 颜色
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*/
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void GE_Draw_Point(int16_t x, int16_t y, uint16_t color)
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{
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if (x < 0 || x > LCD_WIDTH - 1 || y < 0 || y > LCD_HEIGHT - 1)
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return;
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GE_Draw_VRam[(x + y * 320) * 2] = color >> 8;
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GE_Draw_VRam[(x + y * 320) * 2 + 1] = color;
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}
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/**
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* @brief 获取指定坐标的点的颜色。坐标不合法返回白色
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* @param x: 0~319
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* @param y: 0~239
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*/
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uint16_t GE_Draw_GetPoint(int16_t x, int16_t y)
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{
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if (x < 0 || x > LCD_WIDTH - 1 || y < 0 || y > LCD_HEIGHT - 1)
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return WHITE;
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return ((uint16_t)GE_Draw_VRam[(x + y * 320) * 2] << 8) | GE_Draw_VRam[(x + y * 320) * 2 + 1];
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}
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/**
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* @brief 用线段连接指定两坐标
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* @param x1: 0~319
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* @param y1: 0~239
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* @param x2: 0~319
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* @param y3: 0~239
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* @param color: 颜色
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*/
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void GE_Draw_Line(int16_t x0, int16_t y0, uint16_t x1, uint16_t y1, uint16_t color)
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{
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//使用 Bresenham 算法
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int16_t dx = abs(x1 - x0);
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int8_t sx = x0 < x1 ? 1 : -1;
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int16_t dy = -abs(y1 - y0);
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int8_t sy = y0 < y1 ? 1 : -1;
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int16_t err = dx + dy, e2;
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while (1)
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{
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GE_Draw_Point(x0, y0, color);
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if (x0 == x1 && y0 == y1)
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break;
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e2 = 2 * err;
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if (e2 >= dy)
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{
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err += dy;
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x0 += sx;
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}
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if (e2 <= dx)
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{
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err += dx;
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y0 += sy;
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}
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}
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}
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/**
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* @brief 以指定颜色绘制矩形边框
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* @param x: 0~319
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* @param y: 0~239
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* @param width: 矩形的宽
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* @param height: 矩形的高
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* @param color: 颜色
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*/
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void GE_Draw_Rectangle(int16_t x, int16_t y, uint16_t width, uint16_t height, uint16_t color)
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{
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uint16_t i;
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for (i = 0; i < width; i++)
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{
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GE_Draw_Point(x + i, y, color);
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GE_Draw_Point(x + i, y + height - 1, color);
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}
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for (i = 0; i < height; i++)
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{
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GE_Draw_Point(x, y + i, color);
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GE_Draw_Point(x + width - 1, y + i, color);
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}
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}
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/**
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* @brief 以指定颜色绘制圆
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* @param xm: 0~319
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* @param ym: 0~239
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* @param r: 圆的半径
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* @param color: 颜色
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*/
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void GE_Draw_Circle(int16_t xm, int16_t ym, uint16_t r, uint16_t color)
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{
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int16_t x = -r, y = 0, err = 2 - 2 * r, rm = r;
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do
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{
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GE_Draw_Point(xm - x, ym + y, color);
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GE_Draw_Point(xm - y, ym - x, color);
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GE_Draw_Point(xm + x, ym - y, color);
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GE_Draw_Point(xm + y, ym + x, color);
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rm = err;
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if (rm > x)
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err += ++x * 2 + 1;
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if (rm <= y)
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err += ++y * 2 + 1;
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} while (x < 0);
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}
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/**
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* @brief 绘制矩形图片。图片为 const unsigned char 数组，4096 色，不含图像头。
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* 请确保图片完全在屏幕区域内
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* @param x: 0~319
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* @param y: 0~239
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* @param is_reverse: TRUE 为反色。反色模式下刷新较慢
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* @param pos_mode: UP_LEFT 为从左上角开始显示，MID 为以坐标为中心显示
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* @param pic: 指向图片
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* @param width: 图片的宽
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* @param height: 图片的高
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*/
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void GE_Draw_Pic(
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int16_t x,
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int16_t y,
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uint8_t is_reverse,
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uint8_t pos_mode,
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const unsigned char *pic,
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uint16_t width,
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uint16_t height)
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{
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if (pos_mode == MID)
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{
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x = x - width / 2;
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y = y - height / 2;
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}
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if (x == 0 && y == 0 && width == LCD_WIDTH && height == LCD_HEIGHT)
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memcpy(GE_Draw_VRam, pic, 153600);
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uint32_t point_num = width * height;
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int16_t x0 = x, y0 = y;
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uint16_t color;
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if (is_reverse == TRUE) //反色模式
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{
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for (uint32_t i = 0; i < point_num; i++)
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{
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color = 0xffff - (((uint16_t)pic[2 * i] << 8) | pic[2 * i + 1]);
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GE_Draw_Point(x++, y, color);
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if (x == x0 + width)
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{
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y++;
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x = x0;
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}
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}
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}
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else //非反色模式
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{
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for (uint32_t i = 0; i < point_num; i++)
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{
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color = ((uint16_t)pic[2 * i] << 8) | pic[2 * i + 1];
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GE_Draw_Point(x++, y, color);
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if (x == x0 + width)
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{
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y++;
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x = x0;
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}
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}
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}
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}
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/**
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* @brief 绘制矩形图片，使用设置
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* @param x: 0~319
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* @param y: 0~239
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* @param pic: 指向图片
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* @param width: 图片的宽
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* @param height: 图片的高
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*/
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void GE_Draw_Pic_WithSet(int16_t x, int16_t y, const unsigned char *pic, uint16_t width, uint16_t height)
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{
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GE_Draw_Pic(
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x,
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y,
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ge_draw_pic_set.is_reverse,
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ge_draw_pic_set.pos_mode,
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pic,
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width,
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height);
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}
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/**
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* @brief 绘制单色位图。图片为 const unsigned char 数组，不含图像头
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* 请确保图片完全在屏幕区域内
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* @param x: 0~319
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* @param y: 0~239
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* @param draw_mode: 绘制方式。MONO_OR MONO_AND MONO_XOR MONO_COVER
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* @param pos_mode: UP_LEFT 为从左上角开始显示，MID 为以坐标为中心显示
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* @param mono_color: 颜色
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* @param back_color: 背景色。只在 MONO_COVER 时有效
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* @param pic: 指向图片
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* @param width: 图片的宽
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* @param height: 图片的高
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*/
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void GE_Draw_Mono(
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int16_t x,
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int16_t y,
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uint8_t draw_mode,
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uint8_t pos_mode,
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uint16_t mono_color,
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uint16_t back_color,
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const unsigned char *pic,
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uint16_t width,
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uint16_t height)
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{
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if (pos_mode == MID)
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{
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x = x - width / 2;
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y = y - height / 2;
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}
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uint8_t temp8;
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int16_t x0 = x, y0 = y;
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//循环横向输出
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for (uint16_t i = 0; y - y0 < height; i++)
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{
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temp8 = pic[i];
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for (uint16_t j = 0; j < 8; j++)
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{
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if (temp8 & 0x80)
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{
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if (
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(draw_mode == MONO_OR) ||
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(draw_mode == MONO_AND && GE_Draw_GetPoint(x, y) == mono_color) ||
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(draw_mode == MONO_XOR && GE_Draw_GetPoint(x, y) != mono_color) ||
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(draw_mode == MONO_COVER))
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{
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GE_Draw_Point(x, y, mono_color);
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}
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}
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else
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{
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if (
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(draw_mode == MONO_AND && GE_Draw_GetPoint(x, y) != mono_color) ||
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(draw_mode == MONO_XOR && GE_Draw_GetPoint(x, y) == mono_color) ||
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(draw_mode == MONO_COVER))
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{
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GE_Draw_Point(x, y, back_color);
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}
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}
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temp8 <<= 1;
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x++;
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if (x - x0 == width)
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{
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x = x0;
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y++;
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break;
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}
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}
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}
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}
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/**
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* @brief 绘制单色位图，使用设置。图片为 const unsigned char 数组，不含图像头
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* 请确保图片完全在屏幕区域内
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* @param x: 0~319
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* @param y: 0~239
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* @param pic: 指向图片
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* @param width: 图片的宽
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* @param height: 图片的高
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*/
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void GE_Draw_Mono_WithSet(
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int16_t x,
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int16_t y,
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const unsigned char *pic,
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uint16_t width,
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uint16_t height)
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{
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GE_Draw_Mono(
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x,
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y,
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ge_draw_mono_set.draw_mode,
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ge_draw_mono_set.pos_mode,
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ge_draw_mono_set.mono_color,
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ge_draw_mono_set.back_color,
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pic,
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width,
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height);
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}
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