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在線使用各種教程/示例/文檔/論壇，我輸入了代碼以允許CUDA操作OpenGL紋理，以便將其輸出到屏幕。我的顯示方法是使用PBO和uchar4數組的分配紋理圖像。儘管我嘗試解決這個問題，但紋理不會出現在2D表面上。我似乎無法找出問題所在。使用CUDA，SFML和OpenGL：紋理拒絕出現在四邊形上
這些都是我檢查了東西/迄今所做：我創建了一個PBO與CUDA註冊它，叫cudaGraphicsResourceGetMappedPointer之前和GPU函數調用後未作圖等同，確信glEnable被調用2D_TEXTURE ，glDisable在不需要時調用任何不必要的值，未綁定的紋理/緩衝區。如果SFML是原因，我還重置了SFML OpenGL狀態。方形紋理也被使用。我的OpenGL版本和CUDA版本適用於我使用的所有函數調用。
當我檢查cudaErrors和OpenGL錯誤時，程序中似乎沒有任何錯誤。
我不知道，如果這事做吧，但是當我打電話：
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
我四似乎並沒有顯示。
我主要從這個website找到靈感。 非常感謝！
這裏是我的代碼：
Main.cpp的
#include <GL/glew.h>
#include <windows.h>
#include <GL/GL.h>
#include <SFML/Window.hpp>
#include <SFML/OpenGL.hpp>
#include <SFML/System.hpp>
#include <SFML/Graphics/RenderWindow.hpp>
#include "GeneralTypedef.h"
#include "OpenGLTest.cuh"
int main()
{
// create the window
sf::RenderWindow window(sf::VideoMode(1024, 1024), "OpenGL");
//window.setVerticalSyncEnabled(true);
sf::Vector2u windowSize;
windowSize = sf::Vector2u(window.getSize());
bool running = true;
glewInit();
window.resetGLStates();
std::printf("OpenGL: %s:", glGetString(GL_VERSION));
// We will not be using SFML's gl states.
OpenGLTest* test = new OpenGLTest(window.getSize());
sf::Time time;
while (running)
{
// handle events
sf::Event event;
while (window.pollEvent(event))
{
if (event.type == sf::Event::Closed)
{
// end the program
running = false;
}
else if (event.type == sf::Event::Resized)
{
// adjust the viewport when the window is resized
glViewport(0, 0, event.size.width, event.size.height);
windowSize = window.getSize();
}
}
// clear the buffers
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
test->createFrame(time.asMicroseconds());
test->drawFrame();
window.display();
}
// release resources...
delete test;
return 0;
}
OpenGLTest.cuh
#ifndef OPENGLTEST_CUH
#define OPENGLTEST_CUH
#include <GL/glew.h>
#include <windows.h>
#include <GL/GL.h>
#include <cuda.h>
#include <cuda_runtime.h>
#include <cuda_gl_interop.h>
#include <SFML/OpenGL.hpp>
#include <SFML/Graphics.hpp>
#include <SFML/System.hpp>
#include "GeneralTypedef.h"
class OpenGLTest
{
public:
uchar4* image;
GLuint gltexture;
GLuint pbo;
cudaGraphicsResource_t cudaPBO;
uchar4* d_textureBufferData;
sf::Vector2u windowSize;
OpenGLTest(sf::Vector2u windowSize)
{
this->windowSize = sf::Vector2u(windowSize);
this->setupOpenGL();
};
~OpenGLTest()
{
delete image;
image == nullptr;
cudaFree(d_textureBufferData);
d_textureBufferData == nullptr;
glDeleteTextures(1, &gltexture);
}
void drawFrame();
void createFrame(float time);
private:
void setupOpenGL();
};
#endif //OPENGLTEST_CUH
OpenGLTest.cu
#include "OpenGLTest.cuh"
__global__ void createGPUTexture(uchar4* d_texture)
{
uint pixelID = blockIdx.x*blockDim.x + threadIdx.x;
d_texture[pixelID].x = 0;
d_texture[pixelID].y = 1;
d_texture[pixelID].z = 1;
d_texture[pixelID].w = 0;
}
__global__ void wow(uchar4* pos, unsigned int width, unsigned int height,
float time)
{
int index = blockIdx.x * blockDim.x + threadIdx.x;
unsigned int x = index%width;
unsigned int y = index/width;
if (index < width*height) {
unsigned char r = (x + (int)time) & 0xff;
unsigned char g = (y + (int)time) & 0xff;
unsigned char b = ((x + y) + (int)time) & 0xff;
// Each thread writes one pixel location in the texture (textel)
pos[index].w = 0;
pos[index].x = r;
pos[index].y = g;
pos[index].z = b;
}
}
void OpenGLTest::drawFrame()
{
glColor3f(1.0f,1.0f,1.0f);
glBindTexture(GL_TEXTURE_2D, gltexture);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER_ARB, pbo);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, windowSize.x, windowSize.y, GL_RGBA, GL_UNSIGNED_BYTE, 0);
glBegin(GL_QUADS);
glTexCoord2f(0.0f, 0.0f);
glVertex2f(0.0f, float(windowSize.y));
glTexCoord2f(1.0f, 0.0f);
glVertex2f(float(windowSize.x), float(windowSize.y));
glTexCoord2f(1.0f, 1.0f);
glVertex2f(float(windowSize.x), 0.0f);
glTexCoord2f(0.0f,1.0f);
glVertex2f(0.0f, 0.0f);
glEnd();
glFlush();
// Release
glBindBuffer(GL_PIXEL_UNPACK_BUFFER_ARB, 0);
glBindTexture(GL_TEXTURE_2D, 0);
// Test Triangle
/*
glBegin(GL_TRIANGLES);
glColor3f(0.1, 0.2, 0.3);
glVertex2f(0, 0);
glVertex2f(10, 0);
glVertex2f(0, 100);
glEnd();
*/
}
void OpenGLTest::createFrame(float time)
{
cudaGraphicsMapResources(1, &cudaPBO, 0);
size_t numBytes;
cudaGraphicsResourceGetMappedPointer((void**)&d_textureBufferData, &numBytes, cudaPBO);
int totalThreads = windowSize.x * windowSize.y;
int nBlocks = totalThreads/ 256;
// Run code here.
createGPUTexture << <nBlocks, 256>> >(d_textureBufferData);
//wow << <nBlocks, 256 >> >(d_textureBufferData, windowSize.x, windowSize.y, time);
// Unmap mapping to PBO so that OpenGL can access.
cudaGraphicsUnmapResources(1, &cudaPBO, 0);
}
void OpenGLTest::setupOpenGL()
{
image = new uchar4[1024*1024];
glViewport(0, 0, windowSize.x, windowSize.y);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0.0, windowSize.x, windowSize.y, 0.0, -1.0, 1.0);
glEnable(GL_TEXTURE_2D);
glDisable(GL_LIGHTING);
glDisable(GL_DEPTH_TEST);
// Unbind any textures from previous.
glBindTexture(GL_TEXTURE_2D, 0);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER_ARB, 0);
// Create new textures.
glGenTextures(1, &gltexture);
glBindTexture(GL_TEXTURE_2D, gltexture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
// Create image with same resolution as window.
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, windowSize.x , windowSize.y, 0, GL_RGBA, GL_UNSIGNED_BYTE, image);
// Create pixel buffer boject.
glGenBuffers(1, &pbo);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER_ARB, pbo);
glBufferData(GL_PIXEL_UNPACK_BUFFER_ARB, windowSize.x * windowSize.y * sizeof(uchar4), image, GL_STREAM_COPY);
cudaGraphicsGLRegisterBuffer(&cudaPBO, pbo, cudaGraphicsMapFlagsNone);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER_ARB, 0);
glBindTexture(GL_TEXTURE_2D, 0);
}
一般型
#ifndef GENERALTYPEDEF_CUH
#define GENERALTYPEDEF_CUH
typedef unsigned int uint;
#endif // GENERALTYPEDEF_CUH