{"id":486,"date":"2020-01-15T14:20:13","date_gmt":"2020-01-15T06:20:13","guid":{"rendered":"https:\/\/www.caiqinyi.cn\/?p=486"},"modified":"2021-04-24T17:14:48","modified_gmt":"2021-04-24T09:14:48","slug":"opengl_gldrawxxx","status":"publish","type":"post","link":"https:\/\/www.caiqinyi.cn\/index.php\/2020\/01\/15\/opengl_gldrawxxx\/","title":{"rendered":"OpenGL\u4e2d\u7684glDrawXXX\u51fd\u6570\u963b\u585e\u95ee\u9898"},"content":{"rendered":"

\u9996\u5148\u629b\u51fa\u7ed3\u8bba: \u5927\u591a\u6570GL\u51fd\u6570\u5728\u4f7f\u7528\u65f6\u4f1a\u88ab\u7f13\u51b2, \u5e76\u5728\u4ee5\u540e\u5b9e\u9645\u6267\u884c. \u8fd9\u610f\u5473\u7740\u4e0d\u80fd\u5c06CPU\u548cGPU\u89c6\u4e3a\u4e24\u4e2a\u5904\u7406\u5668\u540c\u65f6\u5de5\u4f5c. \u901a\u5e38\u60c5\u51b5\u4e0b, CPU\u4f1a\u6267\u884c\u4e00\u7cfb\u5217\u7f13\u5b58\u7684GL\u51fd\u6570, \u5e76\u4e14\u4e00\u65e6\u5c06\u5b83\u4eec\u4f20\u9012\u7ed9GPU, \u5b83\u5c31\u4f1a\u6267\u884c\u5b83\u4eec. \u8fd9\u610f\u5473\u7740\u65e0\u6cd5\u53ef\u9760\u5730\u63a7\u5236\u6267\u884c\u7279\u5b9aGL\u529f\u80fd\u6240\u9700\u7684\u65f6\u95f4.<\/p>\n

<\/p>\n

\u5173\u4e8e\u8fd9\u65b9\u9762\u7684\u7814\u7a76\u4e3b\u8981\u53c2\u8003\u81ea\u535a\u5ba2\u3010OpenGL\u3011glFinish()\u548cglFlush()\u51fd\u6570\u8be6\u89e3-[\u8f6c]<\/a><\/p>\n

\u901a\u5e38\u60c5\u51b5\u4e0b, OpenGL\u6307\u4ee4\u4e0d\u662f\u7acb\u5373\u6267\u884c\u7684. \u5b83\u4eec\u9996\u5148\u88ab\u9001\u5230\u6307\u4ee4\u7f13\u51b2\u533a, \u7136\u540e\u624d\u88ab\u9001\u5230\u786c\u4ef6\u6267\u884c. glFinish\u548cglFlush\u90fd\u662f\u5f3a\u5236\u5c06\u547d\u4ee4\u7f13\u51b2\u533a\u7684\u5185\u5bb9\u63d0\u4ea4\u7ed9\u786c\u4ef6\u6267\u884c.<\/p>\n

1. glFinish()\u51fd\u6570
\nglFinish()\u5c06\u7f13\u51b2\u533a\u7684\u6307\u4ee4\u7acb\u5373\u9001\u5f80\u786c\u4ef6\u6267\u884c, \u4f46\u662f\u8981\u4e00\u76f4\u7b49\u5230\u786c\u4ef6\u6267\u884c\u5b8c\u8fd9\u4e9b\u6307\u4ee4\u4e4b\u540e\u624d\u8fd4\u56de. \u5982\u679c\u76f4\u63a5\u7ed8\u5236\u5230\u524d\u7f13\u51b2, \u5c31\u9700\u8981\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570, \u786e\u4fdd\u7ed8\u5236\u5b8c\u6bd5. \u5982\u679c\u4f7f\u7528\u53cc\u7f13\u51b2, \u5219\u8fd9\u4e2a\u51fd\u6570\u4e0d\u4f1a\u6709\u592a\u5927\u4f5c\u7528.<\/p>\n

2. glFlush()\u51fd\u6570
\nglFlush()\u6e05\u7a7a\u7f13\u51b2\u533a, \u5c06\u6307\u4ee4\u9001\u5f80\u7f13\u786c\u4ef6\u7acb\u5373\u6267\u884c, \u4f46\u662f\u5b83\u662f\u5c06\u547d\u4ee4\u4f20\u9001\u5b8c\u6bd5\u4e4b\u540e\u7acb\u5373\u8fd4\u56de, \u4e0d\u4f1a\u7b49\u5f85\u6307\u4ee4\u6267\u884c\u5b8c\u6bd5. \u8fd9\u4e9b\u6307\u4ee4\u4f1a\u5728\u6709\u9650\u65f6\u95f4\u5185\u6267\u884c\u5b8c\u6bd5.<\/p>\n

\u5982\u679c\u76f4\u63a5\u7ed8\u5236\u5230\u524d\u7f13\u51b2, \u90a3\u4e48OpenGL\u7684\u7ed8\u5236\u5c06\u4e0d\u4f1a\u6709\u4efb\u4f55\u5ef6\u8fdf. \u8bbe\u60f3\u6709\u4e00\u4e2a\u590d\u6742\u7684\u573a\u666f, \u6709\u5f88\u591a\u7269\u4f53\u9700\u8981\u7ed8\u5236. \u5f53\u8c03\u7528glFlush\u65f6, \u7269\u4f53\u4f1a\u4e00\u4e2a\u4e00\u4e2a\u5730\u51fa\u73b0\u5728\u5c4f\u5e55\u4e0a. \u4f46\u662f, \u5982\u679c\u4f7f\u7528\u53cc\u7f13\u51b2, \u8fd9\u4e2a\u51fd\u6570\u5c06\u4e0d\u4f1a\u6709\u4ec0\u4e48\u5f71\u54cd, \u56e0\u4e3a\u76f4\u5230\u4ea4\u6362\u7f13\u51b2\u533a\u7684\u65f6\u5019\u53d8\u5316\u624d\u663e\u73b0\u51fa\u6765.<\/p>\n

\u5982\u679c\u4f60\u4f7f\u7528\u7684\u662f\u53cc\u7f13\u51b2, \u90a3\u4e48\u53ef\u80fd\u8fd9\u4e24\u4e2a\u51fd\u6570\u90fd\u4e0d\u9700\u8981\u7528\u5230. \u7f13\u51b2\u533a\u4ea4\u6362\u64cd\u4f5c\u4f1a\u9690\u5f0f\u5c06\u547d\u4ee4\u9001\u53bb\u6267\u884c.<\/strong><\/p>\n

3. glFinish\u548cglFlush\u7684\u533a\u522b
\n\u770b\u8d77\u6765\u8fd9\u4e24\u4e2a\u51fd\u6570\u5f88\u76f8\u4f3c, \u4f46\u662f\u4ecd\u7136\u662f\u6709\u533a\u522b\u7684. \u4e00\u822c, \u4f7f\u7528glFlush\u7684\u76ee\u7684\u662f\u786e\u4fdd\u5728\u8c03\u7528\u4e4b\u540e, CPU\u6ca1\u6709OpenGL\u76f8\u5173\u7684\u4e8b\u60c5\u9700\u8981\u505a-\u547d\u4ee4\u4f1a\u9001\u5230\u786c\u4ef6\u6267\u884c. \u8c03\u7528glFinish\u7684\u76ee\u7684\u662f\u786e\u4fdd\u5f53\u8fd4\u56de\u4e4b\u540e, \u6ca1\u6709\u76f8\u5173\u5de5\u4f5c\u7559\u4e0b\u9700\u8981\u7ee7\u7eed\u505a.<\/p>\n

4. glFinish\u4f1a\u9020\u6210\u6027\u80fd\u4e0b\u964d
\n\u5982\u679c\u8c03\u7528glFinish, \u901a\u5e38\u4f1a\u5e26\u6765\u6027\u80fd\u4e0a\u7684\u635f\u5931. \u56e0\u4e3a\u5b83\u4f1a\u662f\u7684GPU\u548cCPU\u4e4b\u95f4\u7684\u5e76\u884c\u6027\u4e27\u5931. \u4e00\u822c, \u6211\u4eec\u63d0\u4ea4\u7ed9\u9a71\u52a8\u7684\u4efb\u52a1\u88ab\u5206\u7ec4, \u7136\u540e\u88ab\u9001\u5230\u786c\u4ef6\u4e0a(\u5728\u7f13\u51b2\u533a\u4ea4\u6362\u7684\u65f6\u5019). \u5982\u679c\u8c03\u7528glFinish, \u5c31\u5f3a\u5236\u9a71\u52a8\u5c06\u547d\u4ee4\u9001\u5230GPU. \u7136\u540eCPU\u7b49\u5f85\u76f4\u5230\u88ab\u4f20\u9001\u7684\u547d\u4ee4\u5168\u90e8\u6267\u884c\u5b8c\u6bd5. \u8fd9\u6837\u5728GPU\u5de5\u4f5c\u7684\u6574\u4e2a\u671f\u95f4\u5185, CPU\u6ca1\u6709\u5de5\u4f5c(\u81f3\u5c11\u5728\u8fd9\u4e2a\u7ebf\u7a0b\u4e0a). \u800c\u5728CPU\u5de5\u4f5c\u65f6(\u901a\u5e38\u662f\u5728\u5bf9\u547d\u4ee4\u5206\u7ec4), GPU\u6ca1\u6709\u5de5\u4f5c, \u56e0\u6b64\u9020\u6210\u6027\u80fd\u4e0a\u7684\u4e0b\u964d.<\/p>\n

\u56e0\u6b64, \u5e94\u8be5\u5c3d\u91cf\u51cf\u5c11\u4f7f\u7528\u6b64\u51fd\u6570. \u6b64\u51fd\u6570\u7684\u4e00\u4e2a\u5e94\u7528\u662f: \u8c03\u8bd5bug. \u5982\u679c\u6211\u4f20\u8f93\u5230\u786c\u4ef6\u7684\u67d0\u6761\u547d\u4ee4\u9020\u6210\u4e86GPU\u7684\u5d29\u6e83, \u627e\u51fa\u4f7f\u5f97GPU\u5d29\u6e83\u7684\u90a3\u6761\u6307\u4ee4\u7684\u7b80\u5355\u65b9\u6cd5\u662f\u5728\u6bcf\u4e2a\u7ed8\u5236\u64cd\u4f5c\u4e4b\u540e\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570. \u8fd9\u6837\u5c31\u53ef\u4ee5\u51c6\u786e\u627e\u51fa\u9020\u6210\u5d29\u6e83\u7684\u547d\u4ee4. \u53e6\u5916, Direct3D\u4e0d\u652f\u6301Finish\u6982\u5ff5.<\/p>\n

PS: \u5224\u65ad\u81ea\u5df1\u7684\u663e\u5361\u662f\u5426\u4f7f\u7528\u53cc\u7f13\u51b2\u7684\u4ee3\u7801\u5982\u4e0b:<\/p>\n

\r\nGLboolean isDoubleBuffer;\r\nglGetBooleanv(GL_DOUBLEBUFFER, &isDoubleBuffer);\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"
\u9996\u5148\u629b\u51fa\u7ed3\u8bba: \u5927\u591a\u6570GL\u51fd\u6570\u5728\u4f7f\u7528\u65f6\u4f1a\u88ab\u7f13\u51b2, \u5e76\u5728\u4ee5\u540e\u5b9e\u9645\u6267\u884c. \u8fd9\u610f\u5473\u7740\u4e0d\u80fd\u5c06CPU\u548cGPU\u89c6\u4e3a\u4e24\u4e2a\u5904\u7406 … \u7ee7\u7eed\u9605\u8bfbOpenGL\u4e2d\u7684glDrawXXX\u51fd\u6570\u963b\u585e\u95ee\u9898<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[],"_links":{"self":[{"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/posts\/486"}],"collection":[{"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/comments?post=486"}],"version-history":[{"count":5,"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/posts\/486\/revisions"}],"predecessor-version":[{"id":709,"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/posts\/486\/revisions\/709"}],"wp:attachment":[{"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/media?parent=486"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/categories?post=486"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/tags?post=486"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}