GLint TextureManager::generateTextureFromPNG(char* url) {
\n\/\/ \u4e0b\u8f7d\u56fe\u7247
\nDownloadResources dr;
\ninitDownloadResource(&dr, url);
\ndownload_image(&dr);<\/p>\n
CxImage image((BYTE*) dr.memoeryBuff, dr.size, CXIMAGE_FORMAT_PNG);<\/p>\n
\/\/ TODO:\u8fd9\u91cc\u80fd\u5148\u91ca\u653edr\u7684\u5185\u5b58\u5417
\nif (image.IsValid()) {
\nlogInfo(“load image ok %s:”, url);
\n} else {
\nlogError(“load image error %s:”, url);
\n}<\/p>\n
int width = image.GetWidth();
\nint height = image.GetHeight();<\/p>\n
GLuint ids[1];
\nglGenTextures(1, ids);
\nLOGI(“gl texture id:%d”, ids[0]);
\nglBindTexture(GL_TEXTURE_2D, ids[0]);<\/p>\n
BYTE* glimagedata = NULL;
\nif (image.AlphaIsValid()) {
\nlong t = width * height * 4;
\n\/\/ \u6709alpha\u901a\u9053
\nif (!image.Encode2RGBA(glimagedata, t)) {
\nLOGE(“image encode 2 rgba error.%s”, image.GetLastError());
\n}
\nglTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA,
\nGL_UNSIGNED_BYTE, glimagedata);
\ncheckGlError(“generate texture”);
\n} else {
\nLOGE(“image is not support alpha.”);
\n}<\/p>\n
image.FreeMemory(glimagedata); \/\/\u91ca\u653e\u5185\u5b58\u7a7a\u95f4
\nfreeDownloadResource(&dr); \/\/ \u91ca\u653e\u6389\u4e0b\u8f7d\u7684\u6587\u4ef6\u5360\u7528\u7684\u5185\u5b58
\nreturn ids[0];
\n}<\/p>\n","protected":false},"excerpt":{"rendered":"
GLint TextureManager::generateTextureFro …<\/p>\n