{"id":3814,"date":"2018-02-25T23:18:04","date_gmt":"2018-02-25T15:18:04","guid":{"rendered":"http:\/\/www.bookcard.net\/wordpress\/?p=3814"},"modified":"2018-10-14T21:25:45","modified_gmt":"2018-10-14T13:25:45","slug":"opengl_read_targa_file_rle","status":"publish","type":"post","link":"https:\/\/www.bookcard.net\/wordpress\/opengl_read_targa_file_rle\/","title":{"rendered":"OpenGL\u4e4b\u8b80\u53d6Targa\u5716\u6a94-RLE\u89e3\u78bc"},"content":{"rendered":"
\"\"<\/a>
OpenGL\u4e4b\u8b80\u53d6Targa\u5716\u6a94-RLE\u89e3\u78bc<\/figcaption><\/figure>\n

\u300eTarga\u300f\u8207\u300eBitmap\u300f\u540c\u6a23\u652f\u6301RLE\u7de8\u78bc,\u55ae\u7de8\u78bc\u65b9\u5f0f\u6709\u9ede\u4e0d\u540c.\u800c\u4e14\u300e\u7d22\u5f15\u3001RGB\u3001\u7070\u5ea6\u300f\u5747\u652f\u6301RLE\u7de8\u78bc.RLE\u7de8\u78bc\u7121\u975e\u5169\u7a2e\u65b9\u5f0f\u300e\u91cd\u8907\u300f\u8207\u300e\u4e0d\u91cd\u8907\u300f\u7684\u50cf\u7d20.\u6e32\u67d3\u6f14\u793a\u7a0b\u5f0f\u4e0b\u8f09<\/a>:<\/p>\n\n\n\n\n\n
\u8b80\u53d6ID<\/td>\n\u7c21\u4ecb<\/td>\n<\/tr>\n
if(ID>=128)<\/p>\n

Len = (BYTE)(ID – 127);<\/td>\n

\u91cd\u8907\u50cf\u7d20<\/p>\n

LEN\u50cf\u7d20\u91cf<\/td>\n<\/tr>\n

if(ID<128)<\/p>\n

Len = BYTE(ID + 1);<\/td>\n

\u4e0d\u91cd\u8907\u7684\u50cf\u7d20<\/p>\n

LEN=\u50cf\u7d20\u91cf<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

RLE\u89e3\u78bc\u7684C\u4ee3\u78bc<\/p>\n

image:\u8f38\u51fa<\/p>\n

data:\u8f38\u5165RLE\u5716\u50cf\u6578\u64da<\/p>\n

image_size:image\u5716\u50cf\u6578\u64da\u9577\u5ea6<\/p>\n

pixel_size:\u50cf\u7d20\u5927\u7d30<\/p>\n

void Load_RLE_Targa(PBYTE image, PBYTE data, int image_size,int pixel_size)<\/p>\n

{<\/p>\n

BYTE id;\/\/\u91cd\u8907\u50cf\u7d20ID>=128,\u4e0d\u91cd\u8907\u7684\u50cf\u7d20ID<128<\/p>\n

BYTE length; \/\/\u50cf\u7d20\u500b\u6578<\/p>\n

BYTE pixel[4] = {0,0,0,0};\/\/ \u50cf\u7d20<\/p>\n

int image_index = 0;\/\/\u5716\u50cf\u7d22\u5f15<\/p>\n

int data_index = 0;\/\/RLE\u7d22\u5f15<\/p>\n

while (image_index < image_size)<\/p>\n

{<\/p>\n

id = data[data_index++];\/\/ \u8b80\u53d6ID<\/p>\n

if (id >= 128)\/\/ \u91cd\u8907\u7684\u50cf\u7d20<\/p>\n

{\u00a0\u00a0 \/\/ \u50cf\u7d20\u500b\u6578<\/p>\n

length = (BYTE)(id – 127);\/\/\u50cf\u7d20\u500b\u6578<\/p>\n

memcpy(pixel, &data[data_index], pixel_size); \/\/ \u8b80\u91cd\u8907\u50cf\u7d20<\/p>\n

data_index = data_index + pixel_size;\/\/\u79fb\u52d5RLE\u7d22\u5f15<\/p>\n

while (length > 0)\/\/\u00a0 \u91cd\u8907\u5beb\u5165\u6578\u64da<\/p>\n

{<\/p>\n

memcpy(image+image_index, pixel, pixel_size);\/\/\u91cd\u8907\u5beb\u5165\u6578\u64da<\/p>\n

image_index = image_index + pixel_size;\/\/\u79fb\u52d5\u5716\u50cf\u7d22\u5f15<\/p>\n

–length;\/\/ \u500b\u6578\u6e1b\u4e00<\/p>\n

}<\/p>\n

}<\/p>\n

else<\/p>\n

{\u00a0 \/\/ \u4e0d\u91cd\u8907\u7684\u50cf\u7d20<\/p>\n

length = BYTE(id + 1); \/\/ \u50cf\u7d20\u500b\u6578<\/p>\n

\/\/ \u62f7\u8c9d\u50cf\u7d20<\/p>\n

memcpy(image+image_index, data+data_index, length*pixel_size);<\/p>\n

image_index = image_index + length * pixel_size;\/\/ \u79fb\u52d5\u5716\u50cf\u7d22\u5f15<\/p>\n

data_index = data_index + length * pixel_size; \/\/\u79fb\u52d5RLE\u7d22\u5f15<\/p>\n

}<\/p>\n

}<\/p>\n

}<\/p>\n","protected":false},"excerpt":{"rendered":"

\u300eTarga\u300f\u8207\u300eBitmap\u300f\u540c\u6a23\u652f\u6301RLE\u7de8\u78bc,\u55ae\u7de8\u78bc\u65b9\u5f0f\u6709\u9ede\u4e0d\u540c.\u800c\u4e14\u300e\u7d22\u5f15\u3001RGB\u3001\u7070\u5ea6\u300f\u5747\u652f\u6301RLE … <\/p>\n

\u7e7c\u7e8c\u95b1\u8b80 OpenGL\u4e4b\u8b80\u53d6Targa\u5716\u6a94-RLE\u89e3\u78bc<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[62],"tags":[50],"class_list":["post-3814","post","type-post","status-publish","format-standard","hentry","category-opengl","tag-opengl","entry"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/posts\/3814","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/comments?post=3814"}],"version-history":[{"count":5,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/posts\/3814\/revisions"}],"predecessor-version":[{"id":3996,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/posts\/3814\/revisions\/3996"}],"wp:attachment":[{"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/media?parent=3814"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/categories?post=3814"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/tags?post=3814"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}