6
我正在使用Xcode 4.5.1並在iOS6上測試iPhone5。Xcode中的幀捕獲失敗
我正在使用幀捕捉功能沒有問題，但突然它停止工作。 當我按下圖像採集按鈕時，看起來圖像被採集，手機切換到黑屏，只是突然切換回應用程序屏幕，應用程序繼續運行。我仍然可以調試和暫停應用程序，但是無法獲取幀捕獲。我在控制檯中也看不到任何錯誤。
停止工作的原因是這段代碼。這段代碼應該呈現給rendertexture，但rendertexture似乎是空白的。我想用幀捕獲功能，以找出什麼是錯的，但代碼本身不會讓我捕捉... :(
任何想法，爲什麼
// ------------- init function -----------------
// Create the framebuffer and bind it
glGenFramebuffers(1, &g_framebuffer);
glBindFramebuffer(GL_FRAMEBUFFER, g_framebuffer);
//Create the destination texture, and attach it to the framebuffer’s color attachment point.
glGenTextures(1, &g_texture);
glBindTexture(GL_TEXTURE_2D, g_texture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, g_texture, 0);
//Test the framebuffer for completeness
GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER) ;
if(status != GL_FRAMEBUFFER_COMPLETE) {
NSLog(@"failed to make complete framebuffer object %x", status);
} else {
NSLog(@"SkyPlugin initialized");
}
// ----------------- on update ------------------
glGetIntegerv(GL_FRAMEBUFFER_BINDING, &oldFBO);
glGetIntegerv(GL_VIEWPORT, oldViewPort);
// set the framebuffer and clear
glBindTexture(GL_TEXTURE_2D, 0);
glBindFramebuffer(GL_FRAMEBUFFER, g_framebuffer);
glViewport(0, 0, 32, 32);
//glClearColor(0.9f, 0.1f, 0.1f, 1.0f);
glDisable(GL_DEPTH_TEST);
glClear(GL_COLOR_BUFFER_BIT);
// Set shader
glUseProgram(m_program);
// do some glEnableVertexAttribArray
// ...
// texture setting
glActiveTexture(GL_TEXTURE0);
glUniform1i(m_uniform, 0);
ResourceManager* resourceManager = ResourceManager::GetInstance();
glBindTexture(GL_TEXTURE_2D, m_texture[0]);
// ----------- Draw -----------
// Draws a full-screen quad to copy textures
static const vertexDataUV quad[] = {
{/*v:*/{-1.f,-1.f,0}, /*t:*/{0,0}},
{/*v:*/{-1.f,1,0}, /*t:*/{0,1}},
{/*v:*/{1,-1.f,0}, /*t:*/{1,0}},
{/*v:*/{1,1,0}, /*t:*/{1,1}}
};
static const GLubyte indeces[] = {0,2,1,3};
glVertexAttribPointer(m_posAttrib, 3, GL_FLOAT, 0, sizeof(vertexDataUV), &quad[0].vertex);
glVertexAttribPointer(m_texCoordAttrib, 2, GL_FLOAT, 0, sizeof(vertexDataUV), &quad[0].uv);
glDrawElements(GL_TRIANGLE_STRIP, 4, GL_UNSIGNED_BYTE, indeces);
// ------------ End
// go back to the main framebuffer!
glBindFramebuffer(GL_FRAMEBUFFER, oldFBO);
glViewport(oldViewPort[0], oldViewPort[1], oldViewPort[2], oldViewPort[3]);
glEnable(GL_DEPTH_TEST);
//glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
編輯：（2012/10月/ 28）
我發現，爲什麼上面的代碼是不工作。我忘了綁定渲染緩衝器！下面工作的代碼，但仍當這個代碼是活躍的幀捕獲失敗...
On init，
//創建渲染緩衝區並綁定它 glGenRenderbuffers（1,& g_renderbuffer）; glBindRenderbuffer（GL_RENDERBUFFER，g_renderbuffer）; glRenderbufferStorage（GL_RENDERBUFFER，GL_RGBA8_OES，w，h）;
// Create the framebuffer and bind it
glGenFramebuffers(1, &g_framebuffer);
glBindFramebuffer(GL_FRAMEBUFFER, g_framebuffer);
glFramebufferRenderbuffer(GL_FRAMEBUFFER,
GL_COLOR_ATTACHMENT0,
GL_RENDERBUFFER, g_renderbuffer);
//Create the destination texture, and attach it to the framebuffer’s color attachment point.
glGenTextures(1, &g_texture);
glBindTexture(GL_TEXTURE_2D, g_texture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, g_texture, 0);
上更新，
glGetIntegerv(GL_RENDERBUFFER_BINDING, &oldRBO);
glGetIntegerv(GL_FRAMEBUFFER_BINDING, &oldFBO);
glGetIntegerv(GL_VIEWPORT, oldViewPort);
// set the framebuffer and clear
glBindTexture(GL_TEXTURE_2D, 0);
glBindFramebuffer(GL_FRAMEBUFFER, g_framebuffer);
glBindRenderbuffer(GL_RENDERBUFFER, g_renderbuffer);
glViewport(0, 0, 32, 32);
// ... draw stuff ...
末更新，
// go back to the main framebuffer!
glBindFramebuffer(GL_FRAMEBUFFER, oldFBO);
glBindRenderbuffer(GL_RENDERBUFFER, oldRBO);
我們有完全相同的問題。不知道是什麼原因:( – Split
到目前爲止唯一的日誌是這樣的： ' 10/28/12 7:02：19.818 PM Xcode [5371]：[MT] DVTAssertions：Warning in/SourceCache/GPUDebuggeriOSSupport/GPUDebuggeriOSSupport-51.8/GPUiOSReplayController.m：127 詳細說明：回放器終止錯誤 對象： 方法：-_handleGuestAppStatusChangeNotification： 螺紋： {名稱=（空），NUM = 1} 請在http://bugreport.apple.com上提供一個錯誤，提供這個警告信息和你可以提供的任何有用信息。 ' –
endavid