// 显示所有的光源// glClear(GL_DEPTH_BUFFER_BIT);glBindFramebuffer(GL_READ_FRAMEBUFFER,gBuffer);glBindFramebuffer(GL_DRAW_FRAMEBUFFER,0);// Write to default framebufferglBlitFramebuffer(0,0,SCR_WIDTH,SCR_HEIGHT,0,0,SC
file+"file.obj";conststring file_9=file+"face.sur";int currentfile=1;GLuint showFaceList,showWireList;int showstate=1;bool showFace=true;bool showWire=false;bool showFlatlines=false;voidsetLightRes(){//GLfloat lightPosition[] = { 0.0f, 0.0f, 1.0f, 0.0f };GLfloat lightPosition[]={...
void glCopyBufferSubData(GLenum readtarget, GLenum writetarget, GLintptr readoffset, GLintptr writeoffset, GLsizeiptr size); 1. 由于一个Target在同一时间只能绑定一个buffer,因此不能在同一类型的buffer中拷贝数据。为此OpenGL为拷贝数据提供了两个专有target:GL_COPY_READ_BUFFER和GL_COPY_WRITE_BUFFER。此...
第二步,是将UI线程中构建的DrawOpTree等信息同步到Render Thread中,因为之前通过ViewRootImpl再Java层调用构建的DisplayListData还没被真正赋值到RenderNode的mDisplayListData(最终用到的对象),只是被setStagingDisplayList暂存,因为中间可能有那种多次meausre、layout的,还有可能发生改变,暂存逻辑如下: static void android...
所以,在你要拷贝的时候,你需要将buffer绑定到两个绑定节点上去,然后执行拷贝操作,这实际上会扰乱OpenGL状态机 To resolve this, OpenGL provides the GL_COPY_READ_BUFFER and GL_COPY_WRITE_BUFFER targets. These targets were added specifically to allow you to copy data from one buffer to another without...
C++ OpenGL分段错误(核心转储)运行时错误要调用OpenGL指令，您需要一个有效的当前OpenGL context，并且...
下面有两个主要的PBO方法,用来提升像素传送性能:streaming texture update 和 asynchronous read-back from the framebuffer. 创建PBO 以前说到,Pixel Buffer Object使用VBO的所有API。不同点仅再两个针对PBO的额外标志:GL_PIXEL_PACK_BUFFER_ARB和GL_PIXEL_UNPACK_BUFFER_ARB. GL_PIXEL_PACK_BUFFER_ARB 从OpenGL传...
Specifies a offset of the first component of the first generic vertex attribute in the array in the data store of the buffer currently bound to the GL_ARRAY_BUFFER target. The initial value is 0. 7.设置Attribute变量,传递给shader void glBindAttribLocation( GLuint program,GLuint index,const GL...
第二步,是将UI线程中构建的DrawOpTree等信息同步到Render Thread中,因为之前通过ViewRootImpl再Java层调用构建的DisplayListData还没被真正赋值到RenderNode的mDisplayListData(最终用到的对象),只是被setStagingDisplayList暂存,因为中间可能有那种多次meausre、layout的,还有可能发生改变,暂存逻辑如下:...
上面那些代码就拷贝了整个readFBO的第一个颜色挂件的数据,然后把它缩放到总大小的80%,然后把它放在drawFBO的第一个颜色挂件的左上角的位置。 Copying Data into a Texture As you read in the last section, you can read data from the framebuffer into your application’s memory (or into a buffer ...