//游戏引擎图像绘制库 #include "stdlib.h" #include "sys.h" #include "spi.h" #include "lcd.h" #include "GameEngine.h" #include "GE_Draw.h" /**************************************** 私有函数 ****************************************/ void GE_Draw_SetWinAbs(uint16_t x_start, uint16_t y_start, uint16_t x_end, uint16_t y_end); void GE_Draw_SetWin(uint16_t x, uint16_t y, uint16_t width, uint16_t height); /*****************************************************************************************/ _ge_draw_set_private ge_draw_set_private; _ge_draw_pic_set ge_draw_pic_set; /** * @brief 初始化 GE_Draw */ void GE_Draw_Init(void) { //私有变量 ge_draw_set_private.x_start = 0; ge_draw_set_private.y_start = 0; ge_draw_set_private.x_end = LCD_WIDTH - 1; ge_draw_set_private.y_end = LCD_HEIGHT - 1; //绘制图片设置 ge_draw_pic_set.is_reverse = FALSE; ge_draw_pic_set.pos_mode = UP_LEFT; GE_Draw_ClrAll(WHITE); } /** * @brief 使用绝对坐标设置显示窗口。忽略重复设置，高效率 * @param x_start: 0~319 * @param y_start: 0~239。窗口左上角坐标 * @param x_end: 0~319 * @param y_end: 0~239。窗口右下角坐标 */ void GE_Draw_SetWinAbs(uint16_t x_start, uint16_t y_start, uint16_t x_end, uint16_t y_end) { if (x_end == ge_draw_set_private.x_end && y_end == ge_draw_set_private.y_end) { if (x_start == ge_draw_set_private.x_start && y_start == ge_draw_set_private.y_start) { return; } else { ge_draw_set_private.x_start = x_start; ge_draw_set_private.y_start = y_start; LCD_SendCmdData16Bits(LCD_CMD_CASET, x_start); LCD_SendCmdData16Bits(LCD_CMD_PASET, y_start); } } else { ge_draw_set_private.x_start = x_start; ge_draw_set_private.y_start = y_start; ge_draw_set_private.x_end = x_end; ge_draw_set_private.y_end = y_end; LCD_SendCmdData32Bits(LCD_CMD_CASET, (x_start << 16) | x_end); LCD_SendCmdData32Bits(LCD_CMD_PASET, (y_start << 16) | y_end); } } /** * @brief 使用窗口大小设置显示窗口。忽略重复设置，高效率 * @param x: 0~319 * @param y: 0~239。x y 为窗口左上角坐标 * @param width: 窗口宽度。需大于 0 * @param height: 窗口高度。需大于 0 */ void GE_Draw_SetWin(uint16_t x, uint16_t y, uint16_t width, uint16_t height) { GE_Draw_SetWinAbs(x, y, x + width - 1, y + height - 1); } /** * @brief 以指定颜色清屏 * @param color: 颜色 */ void GE_Draw_ClrAll(uint16_t color) { GE_Draw_Fill(0, 0, LCD_WIDTH, LCD_HEIGHT, color); } /** * @brief 以指定颜色填充矩形区域。填充速度较慢 * @param x: 0~319 * @param y: 0~239 * @param width: 区域的宽 * @param height: 区域的高 * @param color: 颜色 */ void GE_Draw_Fill(uint16_t x, uint16_t y, uint16_t width, uint16_t height, uint16_t color) { GE_Draw_SetWin(x, y, width, height); uint32_t data16_count = width * height; LCD_RAM_Wr; LCD_Data_Mode_On; for (uint32_t i = 0; i < data16_count; i++) SPI2_Write16Bits(color); } /** * @brief 在指定坐标绘指定颜色的点 * @param x: 0~319 * @param y: 0~239 * @param color: 颜色 */ void GE_Draw_Point(uint16_t x, uint16_t y, uint16_t color) { if (x < 0 || x > LCD_WIDTH - 1 || y < 0 || y > LCD_HEIGHT - 1) return; GE_Draw_SetWinAbs(x, y, LCD_WIDTH - 1, LCD_HEIGHT - 1); LCD_SendCmdData16Bits(LCD_CMD_RAMWR, color); } /** * @brief 用线段连接指定两坐标 * @param x1: 0~319 * @param y1: 0~239 * @param x2: 0~319 * @param y3: 0~239 * @param color: 颜色 */ void GE_Draw_Line(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1, uint16_t color) { //使用 Bresenham 算法 int16_t dx = abs(x1 - x0); int8_t sx = x0 < x1 ? 1 : -1; int16_t dy = -abs(y1 - y0); int8_t sy = y0 < y1 ? 1 : -1; int16_t err = dx + dy, e2; while (1) { GE_Draw_Point(x0, y0, color); if (x0 == x1 && y0 == y1) break; e2 = 2 * err; if (e2 >= dy) { err += dy; x0 += sx; } if (e2 <= dx) { err += dx; y0 += sy; } } } /** * @brief 以指定颜色绘制矩形边框 * @param x: 0~319 * @param y: 0~239 * @param width: 矩形的宽 * @param height: 矩形的高 * @param color: 颜色 */ void GE_Draw_Rectangle(uint16_t x, uint16_t y, uint16_t width, uint16_t height, uint16_t color) { uint16_t i; for (i = 0; i < width; i++) { GE_Draw_Point(x + i, y, color); GE_Draw_Point(x + i, y + height - 1, color); } for (i = 0; i < height; i++) { GE_Draw_Point(x, y + i, color); GE_Draw_Point(x + width - 1, y + i, color); } } /** * @brief 以指定颜色绘制圆 * @param xm: 0~319 * @param ym: 0~239 * @param r: 圆的半径 * @param color: 颜色 */ void GE_Draw_Circle(uint16_t xm, uint16_t ym, uint16_t r, uint16_t color) { int16_t x = -r, y = 0, err = 2 - 2 * r, rm = r; do { GE_Draw_Point(xm - x, ym + y, color); GE_Draw_Point(xm - y, ym - x, color); GE_Draw_Point(xm + x, ym - y, color); GE_Draw_Point(xm + y, ym + x, color); rm = err; if (rm > x) err += ++x * 2 + 1; if (rm <= y) err += ++y * 2 + 1; } while (x < 0); } /** * @brief 绘制矩形图片。图片为 const unsigned char 数组，4096 色，不含图像头 * @param x: 0~319 * @param y: 0~239 * @param is_reverse: TRUE 为反色。反色模式下刷新较慢 * @param pos_mode: UP_LEFT 为从左上角开始显示，MID 为以坐标为中心显示 * @param pic: 指向图片 * @param width: 图片的宽 * @param height: 图片的高 */ void GE_Draw_Pic( uint16_t x, uint16_t y, uint8_t is_reverse, uint8_t pos_mode, const unsigned char *pic, uint16_t width, uint16_t height) { if (pos_mode == UP_LEFT) GE_Draw_SetWin(x, y, width, height); else GE_Draw_SetWin(x - width / 2, y - height / 2, width, height); if (is_reverse == TRUE) //反色模式 { uint16_t data16_temp; uint32_t data8_count = width * height * 2; LCD_RAM_Wr; LCD_Data_Mode_On; for (uint32_t i = 0; i < data8_count; i += 2) { data16_temp = 0xffff - (((uint16_t)pic[i] << 8) | pic[i + 1]); //反色 SPI2_Write16Bits(data16_temp); } } else //非反色模式 { LCD_SendCmdDataBytes(LCD_CMD_RAMWR, (uint8_t *)pic, width * height * 2); } } /** * @brief 绘制矩形图片，使用设置 * @param x: 0~319 * @param y: 0~239 * @param pic: 指向图片 * @param width: 图片的宽 * @param height: 图片的高 */ void GE_Draw_Pic_WithSet(uint16_t x, uint16_t y, const unsigned char *pic, uint16_t width, uint16_t height) { GE_Draw_Pic( x, y, ge_draw_pic_set.is_reverse, ge_draw_pic_set.pos_mode, pic, width, height); }