buffer

问题 Here is very simple code .. Only thing is I repeated same code manytimes for detail debug. Detail info: OpenGL version 3.3.0, Window 7 OS and VS2008, OpenCV 2.2.0. RenderObject(); //glPushClientAttrib(GL_CLIENT_ALL_ATTRIB_BITS); Mat image; image.create(screenHeight,screenWidth, CV_8UC3); glReadPixels(0, 0, screenWidth, screenHeight, GL_BGR, GL_UNSIGNED_BYTE, (uchar*)image.data); int error_code1 = glGetError(); // Error Code: 0, NO Error, Also output is good/as expected! glBindFramebufferEXT

问题 My program uses an iterator to traverse through a map, and spawns off a number of worker threads to process the points from the read iterator, which is all good. Now, I'd like to write the output for each point, and for that I'm using a memory buffer to ensure data is collected from the threads in the correct order before it is written to the file (via another iterator for writing): public class MapMain { // Multiple threads used here, each thread starts in Run() // requests and processes map

问题 There are some terms in many MPI tutorials which have vague meaning such as "Application Buffer" and "System Buffer". I don't understand the difference between them. I also wonder where they are located? I think application buffer is a memory inside the receiving or sending node. So if it is, what is the system buffer? 回答1: In the context of MPI, application buffer (often called user buffer ) is the buffer that holds information to be sent or the place where information is to be received.

问题 I recently found out I can convert a Float32 into an array of bytes that represent it - as such: let number = Math.PI; let bytes = new Uint8Array(new Float32Array([number]).buffer); // [219, 15, 73, 64] Is there a way to convert bytes back into the Float32, in a clean way? 回答1: Is there a way to convert bytes back into the Float32 You don't need to convert it, it's already there! you just need to read it from the float32 view. However in your example you didn't save a reference to the float32

问题 While running a Gradle build, tests are failing. PS: 1. Gradle is using the correct JDK (1.6) to build. 2. I tried this with JDK 1.7, same error comes there as well. 3. I don't see this error when I build it locally (with JDK 1.6) on a linux/windows 4. machine but one of the machine is giving me this error. My ?s 1. What can be done to fix the com.esotericsoftware.kryo.KryoException: Buffer overflow error. 2. Why Gradle process failed, even when test section in build.gradle says: test {

问题 I wrote a function to clear the keyboard buffer, since I think I am having leftover input after a get, but it's just taking input forever. here is the get(String(1..10) --getString10-- procedure getString10(s : in out string10) is Last: Integer; begin s := (others => ' '); Get_Line(S, Last); end getString10; and here is the flush I made, pretty much copied from a wiki on clearing keyboard buffers --flush-- procedure flush is char : character; more : boolean; begin loop get_immediate(char,

问题 I use a buffer to receive data from a serial port. The buffer has a fixed length which is 100 and when I receive data I store the length of this data in a variable (index). I would like to check if the buffer from 0 to index-1 contains a substring. I've read that I could possibly do it using strstr and strdup but I have two issues with this. First I don't know how to extract a string from buffer and second it would be better if I didn't have to copy the string just to delete it one line later

问题 So my assignment is: Using the strncpy and strncat functions in #include<cstring> , implement a function void concat(const char a[ ], const char b[ ], char result[ ], int result_maxlength) that concatenates the strings a and b to the buffer result . Be sure not to overrun the result. It can hold result_maxlength characters, not counting the \0 terminator. (That is, the buffer has buffer_maxlength + 1 bytes available.) Be sure to provide a ‘\0’ terminator. My solution (thus far) is below but I

问题 I need raw buffers of very big size (let say more MB than KB) as light as possible. I would like to have it keep the data in dynamic area, not necessarily it shall be grow-able, I will set the size at construction. I thought about std::vector<unsigned char> but: std::vector<unsigned char> a(VERY_BIG_SIZE); has the data initialized to 0 - I don't need this, I don't want to pay for it... This is embedded system already of high usage of CPU/RAM and I want to benefit from the fact that memory

问题 I have an "access violation" on the Frame Buffer Object (FBO)'s command glGenFramebuffersEXT : void TGLForm::DrawScene() { wglMakeCurrent(ghDC, ghRC); glEnable(GL_TEXTURE_2D); GLuint framebuffer, texturefbo; GLenum status; glGenFramebuffersEXT(1, &framebuffer); // access violation here Founding a help thread concerning the FBOs, I checked that the glext.h initialization were okay and repeated amidst the preprocessor lines this way : #include "glext.h" #include "wglext.h" extern