Opengl es OpenGL ES-获取当前blendFunc
我想这样做:Opengl es OpenGL ES-获取当前blendFunc,opengl-es,Opengl Es,我想这样做: currentBlendFunc = glGetCurrentBlendFunc(); glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); // [...] do stuff glBlendFunc(currentBlendFunc.src, currentBlendFunc.dest); 有没有办法获取当前的混合函数?根据您正在寻找的函数是glGet,带有参数GL_blend_SRC、GL_blend_DST。这是Open
currentBlendFunc = glGetCurrentBlendFunc();
glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
// [...] do stuff
glBlendFunc(currentBlendFunc.src, currentBlendFunc.dest);
有没有办法获取当前的混合函数?根据您正在寻找的函数是glGet,带有参数GL_blend_SRC、GL_blend_DST。这是OpenGL的烦恼之一,即get和set不匹配(除其他外)。我刚刚遇到了完全相同的情况。下面是我保存以前的混合状态并在完成后恢复的方法
// save off current state of blend enabled
GLboolean blendEnabled;
glGetBooleanv(GL_BLEND, &blendEnabled);
// save off current state of src / dst blend functions
GLint blendSrc;
GLint blendDst;
glGetIntegerv(GL_BLEND_SRC_ALPHA, &blendSrc);
glGetIntegerv(GL_BLEND_DST_ALPHA, &blendDst);
//
// change blend state... do other stuff
//
// restore saved state of blend enabled and blend functions
if (blendEnabled) {
glEnable(GL_BLEND);
}
else {
glDisable(GL_BLEND);
}
glBlendFunc(blendSrc, blendDst);
几年后,我在同一期杂志上发表了同样的文章,这些文件仍然不清楚或有漏洞 @但是,不要在未完成/错误中使用解决方案,您还需要恢复
\u RGB
值:
GLint last_blend_src_rgb; glGetIntegerv(GL_BLEND_SRC_RGB, &last_blend_src_rgb);
GLint last_blend_dst_rgb; glGetIntegerv(GL_BLEND_DST_RGB, &last_blend_dst_rgb);
GLint last_blend_src_alpha; glGetIntegerv(GL_BLEND_SRC_ALPHA, &last_blend_src_alpha);
GLint last_blend_dst_alpha; glGetIntegerv(GL_BLEND_DST_ALPHA, &last_blend_dst_alpha);
glBlendFuncSeparate(last_blend_src_rgb, last_blend_dst_rgb, last_blend_src_alpha, last_blend_dst_alpha);