Function display

cpp/5_Domain_Specific/bicubicTexture/bicubicTexture.cpp:211–293

display results using OpenGL (called by GLUT)

// display results using OpenGL (called by GLUT)
void display()
{
    sdkStartTimer(&timer);

    // map PBO to get CUDA device pointer
    uchar4 *d_output;
    checkCudaErrors(cudaGraphicsMapResources(1, &cuda_pbo_resource, 0));
    size_t num_bytes;
    checkCudaErrors(cudaGraphicsResourceGetMappedPointer((void **)&d_output, &num_bytes, cuda_pbo_resource));
    render(imageWidth, imageHeight, tx, ty, scale, cx, cy, blockSize, gridSize, g_FilterMode, d_output);

    checkCudaErrors(cudaGraphicsUnmapResources(1, &cuda_pbo_resource, 0));

    // Common display path
    {
        // display results
        glClear(GL_COLOR_BUFFER_BIT);

#if USE_BUFFER_TEX
        // display using buffer texture
        glBindTexture(GL_TEXTURE_BUFFER_EXT, bufferTex);
        glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, fprog);
        glEnable(GL_FRAGMENT_PROGRAM_ARB);
        glProgramLocalParameterI4iNV(GL_FRAGMENT_PROGRAM_ARB, 0, width, 0, 0, 0);
#else
        // download image from PBO to OpenGL texture
        glBindBuffer(GL_PIXEL_UNPACK_BUFFER_ARB, pbo);
        glBindTexture(GL_TEXTURE_TYPE, displayTex);
        glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
        glTexSubImage2D(GL_TEXTURE_TYPE, 0, 0, 0, width, height, GL_BGRA, GL_UNSIGNED_BYTE, 0);
        glEnable(GL_TEXTURE_TYPE);
#endif

        // draw textured quad
        glDisable(GL_DEPTH_TEST);
        glBegin(GL_QUADS);
        glTexCoord2f(0.0f, (GLfloat)height);
        glVertex2f(0.0f, 0.0f);
        glTexCoord2f((GLfloat)width, (GLfloat)height);
        glVertex2f(1.0f, 0.0f);
        glTexCoord2f((GLfloat)width, 0.0f);
        glVertex2f(1.0f, 1.0f);
        glTexCoord2f(0.0f, 0.0f);
        glVertex2f(0.0f, 1.0f);
        glEnd();
        glDisable(GL_TEXTURE_TYPE);
        glDisable(GL_FRAGMENT_PROGRAM_ARB);

        glBindBuffer(GL_PIXEL_UNPACK_BUFFER_ARB, 0);

        if (drawCurves) {
            // draw spline curves
            glPushMatrix();
            glScalef(0.25, 0.25, 1.0);

            glTranslatef(0.0, 2.0, 0.0);
            glColor3f(1.0, 0.0, 0.0);
            plotCurve(bspline_w3);