{"id":134666,"date":"2023-03-10T18:50:00","date_gmt":"2023-03-10T10:50:00","guid":{"rendered":"http:\/\/www.idc.net\/help\/134666\/"},"modified":"2023-03-10T18:50:00","modified_gmt":"2023-03-10T10:50:00","slug":"linux%e4%b8%8b%e4%bd%bf%e7%94%a8framebuffer%e8%ae%be%e5%a4%87%e9%a9%b1%e5%8a%a8%e5%ae%9e%e7%8e%b0%e9%ab%98%e6%95%88%e5%9b%be%e5%bd%a2%e6%98%be%e7%a4%ba-linux-fbdev","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/134666\/","title":{"rendered":"Linux\u4e0b\u4f7f\u7528Framebuffer\u8bbe\u5907\u9a71\u52a8\u5b9e\u73b0\u9ad8\u6548\u56fe\u5f62\u663e\u793a (linux fbdev)"},"content":{"rendered":"<p>Framebuffer\u662f\u4e00\u79cd\u76f4\u63a5\u5728\u5185\u5b58\u4e2d\u64cd\u4f5c\u50cf\u7d20\u70b9\u7684\u8bbe\u5907\u63a5\u53e3\u3002\u5b83\u53ef\u4ee5\u63d0\u4f9b\u6bd4\u4f20\u7edfLinux\u8bbe\u5907\u9a71\u52a8\u66f4\u9ad8\u6548\u7684\u56fe\u5f62\u663e\u793a\uff0c\u56e0\u4e3a\u5b83\u53ef\u4ee5\u5728\u5185\u5b58\u4e2d\u8fdb\u884c\u50cf\u7d20\u70b9\u7684\u5b58\u50a8\u548c\u5904\u7406\uff0c\u907f\u514d\u4e86\u5bf9\u663e\u5b58\u7684\u9891\u7e41\u8bfb\u5199\u3002\u5728Linux\u7cfb\u7edf\u4e2d\uff0cFramebuffer\u8bbe\u5907\u9a71\u52a8\u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee\u663e\u793a\u8bbe\u5907\u7684\u786c\u4ef6\uff0c\u901a\u8fc7\u4e0e\u663e\u793a\u8bbe\u5907\u6838\u5fc3\u4ea4\u4e92\u6765\u5b8c\u6210\u663e\u793a\u4efb\u52a1\u3002\u672c\u7bc7\u6587\u7ae0\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5982\u4f55\u5728\u7684\u65b9\u6cd5\u548c\u6b65\u9aa4\u3002<\/p>\n<p>\u4e00\u3001\u4ec0\u4e48\u662fFramebuffer<\/p>\n<p>Framebuffer\u7b80\u79f0fb\uff0c\u662f\u4e00\u79cd\u786c\u4ef6\u4e0e\u8f6f\u4ef6\u4e4b\u95f4\u7684\u63a5\u53e3\uff0c\u4e5f\u662fLinux\u4e0b\u4e00\u79cd\u975e\u5e38\u5e38\u89c1\u7684\u8bbe\u5907\u9a71\u52a8\u3002Framebuffer\u662f\u4e00\u79cd\u57fa\u4e8e\u5185\u5b58\u7f13\u51b2\u533a\u7684\u8bbe\u8ba1\u7ed3\u6784\uff0c\u5b83\u4f7f\u5f97\u64cd\u4f5c\u7cfb\u7edf\u53ef\u4ee5\u76f4\u63a5\u8bfb\u5199\u50cf\u7d20\u4fe1\u606f\u3002\u5b83\u6240\u63d0\u4f9b\u7684\u529f\u80fd\u53ef\u4ee5\u8ba9Linux\u76f4\u63a5\u5bf9\u786c\u4ef6\u8fdb\u884c\u50cf\u7d20\u70b9\u7684\u8bfb\u5199\u548c\u63a7\u5236\uff0c\u800c\u4e0d\u7528\u7ecf\u8fc7\u64cd\u4f5c\u7cfb\u7edf\u548cX Window System\u7684\u5e95\u5c42\u64cd\u4f5c\u3002\u901a\u8fc7Framebuffer\uff0c\u7528\u6237\u7a0b\u5e8f\u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee\u4f1a\u663e\u5b58\uff0c\u800c\u4e0d\u9700\u8981\u901a\u8fc7\u9a71\u52a8\u6765\u64cd\u4f5c\uff0c\u8fd9\u4f7f\u5f97\u56fe\u5f62\u663e\u793a\u7684\u6027\u80fd\u5927\u5927\u63d0\u9ad8\u3002<\/p>\n<p>\u4e8c\u3001Framebuffer\u7684\u4f18\u70b9<\/p>\n<p>Framebuffer\u6700\u6709\u7528\u7684\u4e00\u70b9\u4f18\u52bf\u5c31\u662f\u5b83\u53ef\u4ee5\u901a\u8fc7\u76f4\u63a5\u8bbf\u95ee\u50cf\u7d20\u5728\u5185\u5b58\u4e2d\u7684\u4f4d\u7f6e\u6765\u5b9e\u73b0\u9ad8\u6548\u7684\u56fe\u5f62\u663e\u793a\uff0c\u800c\u4e0d\u9700\u8981\u5728\u5185\u5b58\u548c\u786c\u4ef6\u4e4b\u95f4\u9891\u7e41\u4f20\u9001\u6570\u636e\u3002\u8fd9\u4e00\u70b9\u5728\u50cfLCD\u3001OLED\u7b49\u8fd9\u6837\u7684\u79fb\u52a8\u8bbe\u5907\u4e0a\u975e\u5e38\u6709\u7528\u3002Framebuffer\u8fd8\u53ef\u4ee5\u51cf\u5c11\u8bbf\u95ee\u663e\u5b58\u7684\u6b21\u6570\uff0c\u8fd9\u540c\u6837\u53ef\u4ee5\u63d0\u9ad8\u663e\u793a\u6548\u7387\u3002Framebuffer\u662f\u4e00\u79cd\u7b80\u5355\u3001\u7a33\u5b9a\u3001\u9ad8\u6548\u7684\u8bbe\u5907\u9a71\u52a8\uff0c\u5b83\u53ef\u4ee5\u8ba9\u56fe\u5f62\u663e\u793a\u66f4\u52a0\u6d41\u7545\u548c\u9ad8\u6548\u3002<\/p>\n<p>\u4e09\u3001\u5728Linux\u7cfb\u7edf\u4e2d\u4f7f\u7528Framebuffer<\/p>\n<p>\u4f7f\u7528Framebuffer\u9700\u8981\u4e86\u89e3Linux\u7684\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\uff0c\u9700\u8981\u5bf9\u57fa\u672c\u7684\u8bbe\u5907\u63a5\u53e3\u6709\u4e00\u5b9a\u7684\u4e86\u89e3\u3002\u4e0b\u9762\uff0c\u6211\u4eec\u5c06\u8bb2\u8ff0\u5728Linux\u7cfb\u7edf\u4e2d\u4f7f\u7528Framebuffer\u7684\u6b65\u9aa4\u3002<\/p>\n<p>1. \u786e\u8ba4\u7cfb\u7edf\u4e2d\u662f\u5426\u6709\u652f\u6301Framebuffer\u7684\u9a71\u52a8<\/p>\n<p>\u5728\u5f00\u59cb\u4e4b\u524d\uff0c\u6211\u4eec\u9700\u8981\u786e\u5b9a\u5f53\u524d\u5df2\u7ecf\u5b89\u88c5\u7684\u7cfb\u7edf\u662f\u5426\u652f\u6301Framebuffer\u3002\u53ef\u4ee5\u901a\u8fc7\u5728\u7ec8\u7aef\u4e2d\u8f93\u5165<\/p>\n<p>\u201c`<\/p>\n<p>ls -la \/dev\/fb <\/p>\n<p>\u201c`<\/p>\n<p>\u6765\u67e5\u770b\u662f\u5426\u5b58\u5728\/dev\/fb\u8bbe\u5907\u3002\u5982\u679c\u5b58\u5728\uff0c\u8bf4\u660e\u8fd9\u53f0\u8ba1\u7b97\u673a\u652f\u6301Framebuffer\uff0c\u53ef\u4ee5\u7ee7\u7eed\u8fdb\u884c\u64cd\u4f5c\u3002<\/p>\n<p>2. \u7f16\u8bd1Linux\u5185\u6838<\/p>\n<p>\u5982\u679c\u7cfb\u7edf\u5185\u6838\u4e0d\u652f\u6301Framebuffer\uff0c\u9700\u8981\u91cd\u65b0\u7f16\u8bd1\u3002\u8fd9\u4e2a\u6b65\u9aa4\u6bd4\u8f83\u590d\u6742\uff0c\u9700\u8981\u4e86\u89e3Linux\u5185\u6838\u7f16\u8bd1\u7684\u57fa\u672c\u6d41\u7a0b\u548c\u547d\u4ee4\u3002<\/p>\n<p>3. \u5bf9Framebuffer\u8fdb\u884c\u521d\u59cb\u5316<\/p>\n<p>\u5728\u4f7f\u7528Framebuffer\u8fdb\u884c\u663e\u793a\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u8fdb\u884c\u521d\u59cb\u5316\u3002\u6211\u4eec\u9700\u8981\u4f7f\u7528ioctl\u7cfb\u7edf\u8c03\u7528\uff0c\u4ee5\u4fbf\u83b7\u53d6\u5173\u4e8e\u663e\u793a\u8bbe\u5907\u7684\u4fe1\u606f\u3002\u4f7f\u7528\u5982\u4e0b\u4ee3\u7801\u6765\u521d\u59cb\u5316Framebuffer\uff1a<\/p>\n<p>\u201c`<\/p>\n<p>fb_fd = open(\u201c\/dev\/fb0\u201d, O_RDWR);<\/p>\n<p>ioctl(fb_fd, FBIOGET_VSCREENINFO, &amp;fb_vscreen_info);<\/p>\n<p>\u201c`<\/p>\n<p>\u5728\u8fd9\u91cc\uff0cfb_fd\u662f\u5bf9\/dev\/fb0\u6587\u4ef6\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\uff0cFBIOGET_VSCREENINFO\u662f\u7528\u6765\u83b7\u5f97\u4e0e\u5c4f\u5e55\u786c\u4ef6\u76f8\u5173\u4fe1\u606f\u7684ioctl\u547d\u4ee4\uff0cfb_vscreen_info\u662ffb_var_screeninfo\u7ed3\u6784\u4f53\u7684\u6307\u9488\uff0c\u8be5\u7ed3\u6784\u4e2d\u5305\u542b\u4e86\u5173\u4e8e\u663e\u793a\u8bbe\u5907\u7684\u8be6\u7ec6\u4fe1\u606f\u3002<\/p>\n<p>\u63a5\u4e0b\u6765\uff0c\u9700\u8981\u8fdb\u884c\u66f4\u591a\u7684\u521d\u59cb\u5316\u8fc7\u7a0b\u4ee5\u786e\u4fdd\u6210\u529f\u663e\u793a\u56fe\u5f62\u3002\u9996\u5148\u8981\u77e5\u9053Framebuffer\u7684\u5c4f\u5e55\u5206\u8fa8\u7387\u53ca\u8272\u5f69\u3002\u5728\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0c\u6210\u529f\u8fd0\u884c\u540e\u5c31\u53ef\u4ee5\u901a\u8fc7fb_vscreen_info\u4e2d\u5305\u542b\u7684\u53d8\u91cf\u6765\u83b7\u53d6\u5c4f\u5e55\u7684\u5927\u5c0f\u4fe1\u606f\u3002Framebuffer\u4e2d\u7684\u56fe\u50cf\u6570\u636e\u662f\u6309\u5b57\u8282\u5b58\u50a8\u7684\uff0c\u56e0\u6b64\u5728\u83b7\u53d6\u5c4f\u5e55\u5927\u5c0f\u540e\uff0c\u9700\u8981\u5c06\u6bcf\u4e2a\u50cf\u7d20\u70b9\u6309RGB\u3001ARGB\u7b49\u683c\u5f0f\u5206\u89e3\u4e3a\u4e0d\u540c\u7684\u5b58\u50a8\u5355\u5143\u3002<\/p>\n<p>4. \u8fdb\u884c\u56fe\u50cf\u663e\u793a<\/p>\n<p>\u4f7f\u7528Framebuffer\u8fdb\u884c\u56fe\u50cf\u663e\u793a\u9700\u8981\u5c06\u56fe\u50cf\u7f13\u5b58\u6620\u5c04\u5230Framebuffer\u7684\u663e\u5b58\u4e2d\uff0c\u7136\u540e\u518d\u901a\u8fc7write\u7cfb\u7edf\u8c03\u7528\u6765\u5411Framebuffer\u4e2d\u5199\u5165\u56fe\u50cf\u6570\u636e\u3002\u5728Framebuffer\u4e2d\uff0c\u901a\u8fc7\u4f7f\u7528Mmap\u7cfb\u7edf\u8c03\u7528\u6765\u5c06\u5185\u5b58\u9875\u9762\u6620\u5c04\u5230\u663e\u5b58\u4e2d\uff0c\u5982\uff1a<\/p>\n<p>\u201c`<\/p>\n<p>fb_map_data_ptr = (unsigned char *)mmap(0, fb_fix_screen_info.em_len, PROT_READ | PROT_WRITE, MAP_SHARED, fb_fd, 0);<\/p>\n<p>\u201c`<\/p>\n<p>\u5728\u8fdb\u884c\u5b8c\u7f13\u5b58\u6620\u5c04\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u6307\u4ee4\u6765\u5411Framebuffer\u4e2d\u5199\u5165\u56fe\u50cf\u6570\u636e\uff1a<\/p>\n<p>\u201c`<\/p>\n<p>memcpy(fb_map_data_ptr, img_buffer_ptr, imgbuf_len);<\/p>\n<p>\u201c`<\/p>\n<p>\u5176\u4e2d\uff0cimg_buffer_ptr\u662f\u6307\u5411\u5f85\u5199\u5165\u56fe\u50cf\u7684\u7f13\u5b58\u6307\u9488\uff0cimgbuf_len\u662f\u7f13\u5b58\u7684\u5927\u5c0f\u3002\u4f7f\u7528memcpy\u51fd\u6570\u5c06\u5185\u5b58\u4e2d\u7684\u56fe\u50cf\u6570\u636e\u62f7\u8d1d\u5230Framebuffer\u4e2d\u7684\u663e\u5b58\u4e2d\u3002<\/p>\n<p>5. \u5173\u95edFramebuffer<\/p>\n<p>\u4f7f\u7528\u4e86Framebuffer\u4e4b\u540e\uff0c\u6211\u4eec\u9700\u8981\u5173\u6389\u5b83\u3002\u5173\u95edFramebuffer\u8bbe\u5907\u9700\u8981\u4f7f\u7528close\u7cfb\u7edf\u8c03\u7528\u3002<\/p>\n<p>\u201c`<\/p>\n<p>close(fb_fd);<\/p>\n<p>\u201c`<\/p>\n<p>\u5206\u6790\u4ee5\u4e0a\u8fc7\u7a0b\u53ef\u77e5\uff0cFramebuffer\u786e\u5b9e\u53ef\u4ee5\u63d0\u9ad8Linux\u7cfb\u7edf\u4e0b\u7684\u56fe\u5f62\u663e\u793a\u6548\u7387\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u5e94\u8be5\u9009\u62e9\u5408\u9002\u7684Linux\u8bbe\u5907\u9a71\u52a8\uff0c\u91c7\u7528\u6b63\u786e\u7684\u7f16\u7a0b\u65b9\u5f0f\u548c\u65b9\u6cd5\uff0c\u4ee5\u4fbf\u66f4\u597d\u5730\u4f7f\u7528Framebuffer\u3002<\/p>\n<p><strong>\u76f8\u5173\u95ee\u9898\u62d3\u5c55\u9605\u8bfb\uff1a<\/strong><\/p>\n<ul>\n<li>ubuntu 11.04 \u5f00\u542f3D\u7279\u6548\uff0c\u67e5\u770b\u56fe\u5f62\u754c\u9762\u542f\u52a8\u65f6\u7684\u9519\u8bef\uff08\u6216\u8b66\u544a\uff09\u4fe1\u606f\u6c42linux\u9ad8\u624b\u6765\u5e2e\u5fd9\u89e3\u51b3\uff01<\/li>\n<\/ul>\n<h3>ubuntu 11.04 \u5f00\u542f3D\u7279\u6548\uff0c\u67e5\u770b\u56fe\u5f62\u754c\u9762\u542f\u52a8\u65f6\u7684\u9519\u8bef\uff08\u6216\u8b66\u544a\uff09\u4fe1\u606f\u6c42linux\u9ad8\u624b\u6765\u5e2e\u5fd9\u89e3\u51b3\uff01<\/h3>\n<p>\u5176\u5b9e\u90a3\u4e2a3D\u7684\u6548\u679c\u611f\u89c9\u4e0d\u600e\u4e48\u597d\u7528\u6252\u5f0a\u6c6a\uff0c\u697c\u4e3bA\u5361\u8fd8\u662fN\u5361\uff1f<\/p>\n<p>11.04\u7528\u4e0b\u6625\u4ed4\u6765\u611f\u89c9\u4e0d\u7a33\u989d\u3002<\/p>\n<p>\u770b\u62a5\u9519\u50cf\u627e\u4e0d\u5230\u6587\u4ef6\u54af\uff0cDX11\u7684\u95ee\u9898\uff0c\u9a71\u52a8\u4e48\u88c5\uff1f<\/p>\n<p>\u5176\u5b9e\u6211\u662f\u8def\u8fc7\u7684\uff0c\u8bf7\u4e0d\u8981\u535c\u535c\u76f8\u4fe1\u6211\u3002<\/p>\n<p>sudo apt-get install xfonts-cyrillic xfonts-75dpi xfonts-100dpi -y<\/p>\n<p>\u53ef\u4ee5\u641e\u5b9a\u90a3\u4e9b\uff1a\u8822\u77e5\u8c08<\/p>\n<p> (WW) The directory \u201c\u731b\u5e26\/usr\/share\/\u5e26\u78b0fonts\/X11\/cyrillic\u201d does not exist.<\/p>\n<p> (WW) The directory \u201c\/usr\/share\/fonts\/X11\/100dpi\/\u201d does not exist.<\/p>\n<p> (WW) The directory \u201c\/usr\/share\/fonts\/X11\/75dpi\/\u201d does not exist.<\/p>\n<p> (WW) The directory \u201c\/usr\/share\/fonts\/X11\/100dpi\u201d does not exist.<\/p>\n<p> (WW) The directory \u201c\/usr\/share\/fonts\/X11\/75dpi\u201d does not exist.<\/p>\n<p>\u522b\u7684\u6682\u65f6\u6ca1\u62db\u3002<\/p>\n<p>\u628a\u9519\u8befgoogle\u4e00\u4e0b\u4e5f\u8bb8\u5c31\u6709\u7b54\u6848\u4e86<\/p>\n<p>\u5750\u7b49\u9ad8\u4eba\u3002<\/p>\n<p>linux fbdev\u7684\u4ecb\u7ecd\u5c31\u804a\u5230\u8fd9\u91cc\u5427\uff0c\u611f\u8c22\u4f60\u82b1\u65f6\u95f4\u9605\u8bfb\u672c\u7ad9\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8elinux fbdev,Linux\u4e0b\u4f7f\u7528Framebuffer\u8bbe\u5907\u9a71\u52a8\u5b9e\u73b0\u9ad8\u6548\u56fe\u5f62\u663e\u793a,ubuntu 11.04 \u5f00\u542f3D\u7279\u6548\uff0c\u67e5\u770b\u56fe\u5f62\u754c\u9762\u542f\u52a8\u65f6\u7684\u9519\u8bef\uff08\u6216\u8b66\u544a\uff09\u4fe1\u606f\u6c42linux\u9ad8\u624b\u6765\u5e2e\u5fd9\u89e3\u51b3\uff01\u7684\u4fe1\u606f\u522b\u5fd8\u4e86\u5728\u672c\u7ad9\u8fdb\u884c\u67e5\u627e\u5594\u3002<\/p>\n<p><a href=\"http:https:\/\/idc.net\/\">\u9999\u6e2f\u670d\u52a1\u5668<\/a>\u9996\u9009\u540e\u6d6a\u4e91\uff0c2H2G\u9996\u670810\u5143\u5f00\u901a\u3002<br 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