小编dav*_*ton的帖子

我正在尝试将我的代码提升到一个新的水平.遵循Apple的一些最佳实践,我试图在我的顶点缓冲对象(VBO)周围实现顶点数组对象.我设置我的VBO和VAO像这样:

- (void)setupVBOs {  
    glBindBuffer(GL_ARRAY_BUFFER, 0);
    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
    glBindVertexArrayOES(0);
    {
        glGenVertexArraysOES(1, &directArrayObject);
        glBindVertexArrayOES(directArrayObject);

    //    GLuint texCoordBuffer;
        glGenBuffers(1, &texCoordBuffer);
        glBindBuffer(GL_ARRAY_BUFFER, texCoordBuffer);
        glBufferData(GL_ARRAY_BUFFER, sizeof(DirectVertices), DirectVertices, GL_STATIC_DRAW);

        glVertexAttribPointer(directPositionSlot, 2, GL_FLOAT, GL_FALSE, sizeof(DirectVertex), (GLvoid*)offsetof(DirectVertex, position));
        glEnableVertexAttribArray(directPositionSlot);
        glVertexAttribPointer(texCoordSlot, 2, GL_UNSIGNED_BYTE, GL_FALSE, sizeof(DirectVertex), (GLvoid*)offsetof(DirectVertex, texCoord));
        glEnableVertexAttribArray(texCoordSlot);

        glGenVertexArraysOES(1, &arrayObject);
        glBindVertexArrayOES(arrayObject);

    //    GLuint vertexBuffer;
        glGenBuffers(1, &vertexBuffer);
        glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
        glBufferData(GL_ARRAY_BUFFER, sizeof(Vertices), Vertices, GL_STATIC_DRAW);

        glVertexAttribPointer(positionSlot, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), 0);
        glEnableVertexAttribArray(positionSlot);
        glVertexAttribPointer(colorSlot, 4, GL_UNSIGNED_BYTE, GL_FALSE, sizeof(Vertex), (GLvoid*)offsetof(Vertex, Color));
        glEnableVertexAttribArray(colorSlot);

    //    GLuint indexBuffer;
        glGenBuffers(1, &indexBuffer);
        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuffer);
        glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(Indices), Indices, GL_STATIC_DRAW); …

我在AVAssetWriterInputPixelBufferAdaptor中使用pixelBufferPool来创建像素缓冲区以与append方法一起使用.创建4个缓冲区后,pixelBufferPool属性变为NULL;

我设置了我的编写器,输入和适配器,如下所示:

- (BOOL) setupRecorder {
    NSError *error = nil;
    if([[NSFileManager defaultManager] fileExistsAtPath:[[self tempFileURL] path]])
        [[NSFileManager defaultManager] removeItemAtURL:[self tempFileURL] error:&error];


    assetWriter = [[AVAssetWriter alloc] initWithURL: [self tempFileURL] 
                                            fileType:AVFileTypeQuickTimeMovie
                                               error:&error]; 
    if (error) {
        NSLog(@"Error creating asset writer: %@", error);
        [assetWriter release];
        return NO;
    }
    // writer

    NSDictionary *videoSettings = [NSDictionary dictionaryWithObjectsAndKeys:
                                   AVVideoCodecH264, AVVideoCodecKey, 
                                   [NSNumber numberWithInt:videoWidth], AVVideoWidthKey, 
                                   [NSNumber numberWithInt:videoHeight], AVVideoHeightKey,
                                   nil];

    assetWriterInput = [AVAssetWriterInput assetWriterInputWithMediaType:AVMediaTypeVideo 
                                                      outputSettings:videoSettings];

    NSDictionary *bufferAttributes = [NSDictionary dictionaryWithObjectsAndKeys: 
                                      [NSNumber numberWithInt:kCVPixelFormatType_32BGRA], kCVPixelBufferPixelFormatTypeKey, 
                                      nil];

    adaptor = [[AVAssetWriterInputPixelBufferAdaptor alloc] initWithAssetWriterInput:assetWriterInput sourcePixelBufferAttributes:bufferAttributes];  
    [adaptor …

我正试图在iPhone 4上的iOS 4.3中将原生平面图像渲染为OpenGL ES 2.0纹理.然而,纹理全部变黑.我的相机配置如下:

[videoOutput setVideoSettings:[NSDictionary dictionaryWithObject:[NSNumber numberWithInt:kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange] 
                                                          forKey:(id)kCVPixelBufferPixelFormatTypeKey]];

我将像素数据传递给我的纹理,如下所示:

glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, bufferWidth, bufferHeight, 0, GL_RGB_422_APPLE, GL_UNSIGNED_SHORT_8_8_REV_APPLE, CVPixelBufferGetBaseAddress(cameraFrame));

我的fragement着色器是:

varying highp vec2 textureCoordinate;

uniform sampler2D videoFrame; 

void main() { 
    lowp vec4 color; 
    color = texture2D(videoFrame, textureCoordinate); 
    lowp vec3 convertedColor = vec3(-0.87075, 0.52975, -1.08175); 
    convertedColor += 1.164 * color.g; // Y
    convertedColor += vec3(0.0, -0.391, 2.018) * color.b; // U
    convertedColor += vec3(1.596, -0.813, 0.0) * color.r; // V
    gl_FragColor = vec4(convertedColor, 1.0); 
} 

我的顶点着色器是

attribute vec4 position;
attribute …

我有两个成功的概念,我想现在合并.我成功地将相位框架分层CATextLayer到CVImageBufferRef相机框架上,然后通过AVAssetWriter使用a来保存它AVAssetWriterInputPixelBufferAdaptor.我这样做:

- (void) processNewBuffer:(CVImageBufferRef)cameraFrame {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

    //    
    //    //update CALayer on main queue
    //    //UIKit is not thread safe
    dispatch_sync(dispatch_get_main_queue(), ^{ 
        [self updateCALayer]; 
    });

    if(recorder.recording) {

        CVPixelBufferLockBaseAddress(cameraFrame,0); 

        // do stuff with buffer here
        uint8_t *baseAddress = (uint8_t *)CVPixelBufferGetBaseAddress(cameraFrame); 
        size_t bytesPerRow = CVPixelBufferGetBytesPerRow(cameraFrame); 
        width = CVPixelBufferGetWidth(cameraFrame); 
        height = CVPixelBufferGetHeight(cameraFrame); 

        /*Create a CGImageRef from the CVImageBufferRef*/
        CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB(); 
        CGContextRef newContext = CGBitmapContextCreate(baseAddress, width, height, 8, bytesPerRow, …

我需要确定用户是否只是销售人员.我的ASP.NET MVC 4控制器中有以下内容:

    public ActionResult Index() {
        string salespersonCode = null;

        var roles = Roles.GetRolesForUser();
        if(roles.Count() == 1 && roles.Contains(UserRoles.Salesperson.ToString()))
            salespersonCode = User.Name();

        return View(new ProspectIndexViewModel { Prospects = _crmService.GetActiveProspects(salespersonCode) });
    }

用户可能有多个角色.如果用户只有该角色,我想将返回的数据限制为仅属于销售人员的数据.其他三个角色(Manager,Admin和SalesAdministrator)将接收整个列表.谢谢!