mirror of
https://github.com/DragonOS-Community/DragonOS.git
synced 2025-06-11 09:06:47 +00:00
318 lines
8.7 KiB
C
318 lines
8.7 KiB
C
#include "screen_manager.h"
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#include <common/string.h>
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#include <driver/multiboot2/multiboot2.h>
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#include <common/kprint.h>
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#include <common/spinlock.h>
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#include <mm/mm.h>
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#include <mm/slab.h>
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#include <driver/uart/uart.h>
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#include <driver/video/video.h>
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extern struct scm_buffer_info_t video_frame_buffer_info;
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static struct List scm_framework_list;
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static spinlock_t scm_register_lock; // 框架注册锁
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static spinlock_t scm_screen_own_lock = {1}; // 改变屏幕归属者时，需要对该锁加锁
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static struct scm_ui_framework_t *__current_framework; // 当前拥有屏幕控制权的框架
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static uint32_t scm_ui_max_id = 0;
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static bool __scm_alloc_enabled = false; // 允许动态申请内存的标志位
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static bool __scm_double_buffer_enabled = false; // 允许双缓冲的标志位
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/**
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* @brief 创建新的帧缓冲区
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*
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* @param type 帧缓冲区类型
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* @return struct scm_buffer_info_t* 新的帧缓冲区结构体
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*/
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static struct scm_buffer_info_t *__create_buffer(uint64_t type)
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{
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// 若未启用双缓冲，则直接返回帧缓冲区
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if (unlikely(__scm_double_buffer_enabled == false))
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return &video_frame_buffer_info;
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struct scm_buffer_info_t *buf = (struct scm_buffer_info_t *)kmalloc(sizeof(struct scm_buffer_info_t), 0);
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if (buf == NULL)
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return (void*)-ENOMEM;
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memset(buf, 0, sizeof(struct scm_buffer_info_t));
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buf->bit_depth = video_frame_buffer_info.bit_depth;
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buf->flags = SCM_BF_DB;
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if (type & SCM_BF_PIXEL)
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buf->flags |= SCM_BF_PIXEL;
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else
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buf->flags |= SCM_BF_TEXT;
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buf->height = video_frame_buffer_info.height;
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buf->width = video_frame_buffer_info.width;
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buf->size = video_frame_buffer_info.size;
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struct Page *p = alloc_pages(ZONE_NORMAL, PAGE_2M_ALIGN(video_frame_buffer_info.size) / PAGE_2M_SIZE, 0);
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if (p == NULL)
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goto failed;
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buf->vaddr = (uint64_t)phys_2_virt(p->addr_phys);
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return buf;
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failed:;
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kfree(buf);
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return (void*)-ENOMEM;
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}
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/**
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* @brief 销毁双缓冲区
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*
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* @param buf
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* @return int
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*/
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static int __destroy_buffer(struct scm_buffer_info_t *buf)
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{
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// 不能销毁帧缓冲区对象
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if (unlikely(buf == &video_frame_buffer_info || buf == NULL))
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return -EINVAL;
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if (unlikely(buf->vaddr == NULL))
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return -EINVAL;
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if (unlikely(verify_area(buf->vaddr, buf->size) == true))
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return -EINVAL;
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// 是否双缓冲区
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if (buf->flags & SCM_BF_FB)
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return -EINVAL;
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// 释放内存页
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free_pages(Phy_to_2M_Page(virt_2_phys(buf->vaddr)), PAGE_2M_ALIGN(video_frame_buffer_info.size) / PAGE_2M_SIZE);
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return 0;
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}
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/**
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* @brief 初始化屏幕管理模块
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*
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*/
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void scm_init()
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{
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list_init(&scm_framework_list);
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spin_init(&scm_register_lock);
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spin_init(&scm_screen_own_lock);
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io_mfence();
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scm_ui_max_id = 0;
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__scm_alloc_enabled = false; // 禁用动态申请内存
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__scm_double_buffer_enabled = false; // 禁用双缓冲
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__current_framework = NULL;
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}
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/**
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* @brief 检查ui框架结构体中的参数设置是否合法
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*
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* @param name 框架名称
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* @param type 框架类型
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* @param ops 框架的操作
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* @return int
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*/
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static int __check_ui_param(const char *name, const uint8_t type, const struct scm_ui_framework_operations_t *ops)
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{
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if (name == NULL)
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return -EINVAL;
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if (!(type == SCM_FRAMWORK_TYPE_GUI || type == SCM_FRAMWORK_TYPE_TEXT))
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return -EINVAL;
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if (ops == NULL)
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return -EINVAL;
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if (ops->install == NULL || ops->uninstall == NULL || ops->enable == NULL || ops->disable == NULL || ops->change == NULL)
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return -EINVAL;
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return 0;
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}
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/**
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* @brief 向屏幕管理器注册UI框架（动态获取框架对象结构体）
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*
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* @param name 框架名
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* @param type 类型
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* @param ops 框架操作方法
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* @return int
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*/
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int scm_register_alloc(const char *name, const uint8_t type, struct scm_ui_framework_operations_t *ops)
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{
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// 若未启用动态申请，则返回。
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if (unlikely(__scm_alloc_enabled == false))
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return -EAGAIN;
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// 检查参数合法性
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if (__check_ui_param(name, type, ops) != 0)
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return -EINVAL;
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struct scm_ui_framework_t *ui = (struct scm_ui_framework_t *)kmalloc(sizeof(struct scm_ui_framework_t *), 0);
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memset(ui, 0, sizeof(struct scm_ui_framework_t));
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strncpy(ui->name, name, 15);
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ui->type = type;
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ui->ui_ops = ops;
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list_init(&ui->list);
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spin_lock(&scm_register_lock);
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ui->id = scm_ui_max_id++;
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spin_unlock(&scm_register_lock);
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// 创建帧缓冲区
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ui->buf = __create_buffer(ui->type);
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if ((uint64_t)(ui->buf) == (uint64_t)-ENOMEM)
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{
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kfree(ui);
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return -ENOMEM;
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}
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// 把ui框架加入链表
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list_add(&scm_framework_list, &ui->list);
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// 调用ui框架的回调函数以安装ui框架，并将其激活
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ui->ui_ops->install(ui->buf);
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ui->ui_ops->enable(NULL);
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if (__current_framework == NULL)
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return scm_framework_enable(ui);
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return 0;
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}
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/**
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* @brief 向屏幕管理器注册UI框架（静态设置的框架对象）
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*
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* @param ui 框架结构体指针
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* @return int 错误码
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*/
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int scm_register(struct scm_ui_framework_t *ui)
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{
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if (ui == NULL)
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return -EINVAL;
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if (__check_ui_param(ui->name, ui->type, ui->ui_ops) != 0)
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return -EINVAL;
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list_init(&ui->list);
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spin_lock(&scm_register_lock);
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ui->id = scm_ui_max_id++;
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spin_unlock(&scm_register_lock);
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ui->buf = __create_buffer(ui->type);
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if ((uint64_t)(ui->buf) == (uint64_t)-ENOMEM)
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return -ENOMEM;
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// 把ui框架加入链表
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list_add(&scm_framework_list, &ui->list);
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// 调用ui框架的回调函数以安装ui框架，并将其激活
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ui->ui_ops->install(ui->buf);
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ui->ui_ops->enable(NULL);
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if (__current_framework == NULL)
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return scm_framework_enable(ui);
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return 0;
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}
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/**
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* @brief 向屏幕管理器卸载UI框架
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*
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* @param ui ui框架结构体
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* @return int
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*/
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int scm_unregister(struct scm_ui_framework_t *ui)
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{
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}
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/**
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* @brief 向屏幕管理器卸载动态创建的UI框架
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*
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* @param ui ui框架结构体
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* @return int
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*/
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int scm_unregister_alloc(struct scm_ui_framework_t *ui)
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{
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}
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/**
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* @brief 允许动态申请内存
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*
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* @return int
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*/
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int scm_enable_alloc()
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{
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__scm_alloc_enabled = true;
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return 0;
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}
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/**
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* @brief 允许双缓冲区
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*
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* @return int
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*/
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int scm_enable_double_buffer()
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{
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if (__scm_double_buffer_enabled == true)
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return 0;
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__scm_double_buffer_enabled = true;
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if (list_empty(&scm_framework_list))
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return 0;
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// 逐个检查已经注册了的ui框架，将其缓冲区更改为双缓冲
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struct scm_ui_framework_t *ptr = container_of(list_next(&scm_framework_list), struct scm_ui_framework_t, list);
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do
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{
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if (ptr->buf == &video_frame_buffer_info)
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{
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uart_send_str(COM1, "##init double buffer##");
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struct scm_buffer_info_t *buf = __create_buffer(SCM_BF_DB | SCM_BF_PIXEL);
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if ((uint64_t)(buf) == (uint64_t)-ENOMEM)
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return -ENOMEM;
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uart_send_str(COM1, "##to change double buffer##");
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if (ptr->ui_ops->change(buf) != 0)
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{
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__destroy_buffer(buf);
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kfree(buf);
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}
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}
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} while (list_next(&ptr->list) != &scm_framework_list);
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// 设置定时刷新的对象
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video_set_refresh_target(__current_framework->buf);
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// 通知显示驱动，启动双缓冲
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video_reinitialize(true);
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uart_send_str(COM1, "##initialized double buffer##");
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return 0;
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}
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/**
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* @brief 启用某个ui框架，将它的帧缓冲区渲染到屏幕上
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*
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* @param ui 要启动的ui框架
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* @return int 返回码
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*/
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int scm_framework_enable(struct scm_ui_framework_t *ui)
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{
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if (ui->buf->vaddr == NULL)
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return -EINVAL;
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spin_lock(&scm_screen_own_lock);
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int retval = 0;
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if (__scm_double_buffer_enabled == true)
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{
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retval = video_set_refresh_target(ui->buf);
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if (retval == 0)
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__current_framework = ui;
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}
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else
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__current_framework = ui;
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spin_unlock(&scm_screen_own_lock);
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return retval;
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}
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/**
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* @brief 当内存管理单元被初始化之后，重新处理帧缓冲区问题
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*
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*/
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void scm_reinit()
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{
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scm_enable_alloc();
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video_reinitialize(false);
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// 遍历当前所有使用帧缓冲区的框架，更新地址
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// 逐个检查已经注册了的ui框架，将其缓冲区更改为双缓冲
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struct scm_ui_framework_t *ptr = container_of(list_next(&scm_framework_list), struct scm_ui_framework_t, list);
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do
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{
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if (ptr->buf == &video_frame_buffer_info)
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{
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ptr->ui_ops->change(&video_frame_buffer_info);
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}
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} while (list_next(&ptr->list) != &scm_framework_list);
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return;
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}
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