227 lines
4.6 KiB
C
227 lines
4.6 KiB
C
#include "fbtool.h"
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//打开并且初始化该frame buffer
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int fb_open(PFBDEV pFbdev)
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{
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//打开frame buffer
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pFbdev->fb = open(pFbdev->dev,O_RDWR);
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if(pFbdev->fb < 0)
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{
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printf("打开错误 %s : %n.请检查内核配置\n",pFbdev->dev);
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return 0;
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}
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// 初始化fb_var
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if(-1 == ioctl(pFbdev->fb,FBIOGET_VSCREENINFO,&(pFbdev->fb_var)))
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{
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printf("ioctl FBIOGET_VSCREENINFO\n");
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return 0;
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}
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// 初始化fb_fix
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if(-1 == ioctl(pFbdev->fb,FBIOGET_FSCREENINFO,&(pFbdev->fb_fix)))
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{
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printf("ioctl FBIOGET_FSCREENINFO\n");
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return 0;
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}
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//将物理地址映射到虚拟地址
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pFbdev->fb_mem_offset = (unsigned long)pFbdev->fb_fix.smem_start & (~PAGE_MASK);
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pFbdev->fb_mem = (unsigned long int)mmap(NULL,pFbdev->fb_fix.smem_len + pFbdev->fb_mem_offset,PROT_READ|PROT_WRITE,MAP_SHARED,pFbdev->fb,0);
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if(-1L == (long)pFbdev->fb_mem){
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printf("mmap error with mem:%lu,mem_offset:%lu\n",pFbdev->fb_mem_offset,pFbdev->fb_mem);
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return 0;
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}
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return 1;
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}
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//关闭frame buffer
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int fb_close(PFBDEV pFbdev)
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{
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close(pFbdev->fb);
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pFbdev->fb = -1;
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}
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//打印frame buffer 所占内存的开始地址
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void pmem_start(PFBDEV pFbdev)
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{
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printf("frame buffer所占内存的开始地址为:%lu\n",pFbdev->fb_fix.smem_start);
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}
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//打印FB_TYPE
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void p_type(PFBDEV pFbdev)
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{
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printf("frame buffer 的类型为:%d\n",pFbdev->fb_fix.type);
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}
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//打印可见清晰度
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void p_visible_res(PFBDEV pFbdev)
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{
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printf("frame buffer的可见清晰度为：\n\tx = %d\n\ty = %d\n",pFbdev->fb_var.xres,pFbdev->fb_var.yres);
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}
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//打印虚拟分辨率
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void p_virt_res(PFBDEV pFbdev)
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{
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printf("frame buffer的虚拟清晰度为：\n\tx = %d\n\ty = %d\n",pFbdev->fb_var.xres_virtual,pFbdev->fb_var.yres_virtual);
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}
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//打印虚拟到可见的偏移量
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void p_offset(PFBDEV pFbdev)
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{
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printf("frame buffer的虚拟分辨率到可见分辨率的偏移量为:\n\tx = %d\n\ty = %d\n",pFbdev->fb_var.xoffset,pFbdev->fb_var.yoffset);
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}
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//打印每个像素的位数
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void p_bpp(PFBDEV pFbdev)
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{
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printf("frame buffer的BPP为：%d\n",pFbdev->fb_var.bits_per_pixel);
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}
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//打印R,G,B和透明度
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void p_rgbt(PFBDEV pFbdev)
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{
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//R位域
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printf("R位域:\n");
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struct fb_bitfield bf = pFbdev->fb_var.red;
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printf("\t开始:%d\n",bf.offset);
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printf("\t长度:%d\n",bf.length);
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printf("\tMSB:%d\n",bf.msb_right);
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//G位域
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printf("G位域:\n");
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bf = pFbdev->fb_var.green;
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printf("\t开始:%d\n",bf.offset);
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printf("\t长度:%d\n",bf.length);
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printf("\tMSB:%d\n",bf.msb_right);
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// B位域
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printf("B位域:\n");
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bf = pFbdev->fb_var.blue;
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printf("\t开始:%d\n",bf.offset);
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printf("\t长度:%d\n",bf.length);
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printf("\tMSB:%d\n",bf.msb_right);
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// 透明度位域
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printf("透明度位域:\n");
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bf = pFbdev->fb_var.transp;
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printf("\t开始:%d\n",bf.offset);
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printf("\t长度:%d\n",bf.length);
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printf("\tMSB:%d\n",bf.msb_right);
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}
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//打印在内存中的高度和宽度
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void p_hw(PFBDEV pFbdev)
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{
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printf("frame buffer在内存中所占的高度和宽度分别是:\n\t宽度 = %d\n\t高度 = %d\n",pFbdev->fb_var.height,pFbdev->fb_var.width);
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}
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//清空控制台
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void clear_con(void *addr,int n,size_t len)
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{
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memset(addr,n,len);
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}
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//映射到内存
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void fb_memcpy(void *addr,void *color,size_t len)
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{
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memcpy(addr,color,len);
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}
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//画点
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void draw_dot(PFBDEV pFbdev,POINT p,uint8_t r,uint8_t g,uint8_t b)
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{
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uint32_t offset;
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uint8_t color[4];
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color[0] = b;
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color[1] = g;
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color[2] = r;
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color[3] = 0x0; //透明度
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offset = p.y * pFbdev->fb_fix.line_length + 4 * p.x;
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//将操作映射到内存中
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fb_memcpy((void*)pFbdev->fb_mem + pFbdev->fb_mem_offset + offset,color,4);
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}
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//画横线
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void draw_h_line(PFBDEV pFbdev,POINT minX,POINT maxX,uint8_t r,uint8_t g,uint8_t b)
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{
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int m;
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int length = maxX.x - minX.x;
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for(m = 0;m < length;m++){
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POINT tp;
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tp.x = minX.x + m;
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tp.y = minX.y;
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draw_dot(pFbdev,tp,r,g,b);
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}
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}
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//画竖线
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void draw_v_line(PFBDEV pFbdev,POINT minY,POINT maxY,uint8_t r,uint8_t g,uint8_t b)
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{
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int m;
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int length = maxY.y - minY.y;
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for(m = 0;m < length;m++){
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POINT tp;
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tp.x = minY.x;
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tp.y = minY.y + m;
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draw_dot(pFbdev,tp,r,g,b);
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}
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}
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//画一个矩形框
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void draw_rec(PFBDEV pFbdev,POINT lu,POINT ld,POINT ru,POINT rd,uint8_t r,uint8_t g,uint8_t b)
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{
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draw_h_line(pFbdev,lu,ru,r,g,b);
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draw_h_line(pFbdev,ld,rd,r,g,b);
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draw_v_line(pFbdev,lu,ld,r,g,b);
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draw_v_line(pFbdev,ru,rd,r,g,b);
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}
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//填充一个矩形框
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void fill_rec(PFBDEV pFbdev,POINT lu,POINT ld,POINT ru,POINT rd,uint8_t r,uint8_t g,uint8_t b)
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{
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int xlen = ru.x - lu.x;
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int ylen = ld.y - lu.y;
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int m,n;
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for(m = 0;m < ylen;m++){
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for(n = 0;n < xlen;n++){
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POINT p;
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p.x = lu.x + n;
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p.y = lu.y + m;
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draw_dot(pFbdev,p,r,g,b);
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}
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}
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}
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