2014/10/15 下午 10:09:42

iphone Programming Glossary: glviewport

Drawing into OpenGL ES framebuffer and getting UIImage from it on iPhone

http://stackoverflow.com/questions/10936157/drawing-into-opengl-es-framebuffer-and-getting-uiimage-from-it-on-iphone

is to set constant to kEAGLRenderingAPIOpenGLES1 the second I did not set model and projection matricies if I use 1.1 glViewport 0 0 width height glMatrixMode GL_PROJECTION glLoadIdentity glOrthof 1.0f 1.0f 1.5f 1.5f 1.0f 1.0f glMatrixMode GL_MODELVIEW..

Draw to offscreen renderbuffer in OpenGL ES (iPhone)

http://stackoverflow.com/questions/1853551/draw-to-offscreen-renderbuffer-in-opengl-es-iphone

GL_LINEAR glTexParameterf GL_TEXTURE_2D GL_TEXTURE_MAG_FILTER GL_LINEAR glClearColor 1.0 1.0 1.0 1.0 glViewport 0 0 512 512 glClear GL_COLOR_BUFFER_BIT setTargetToTexture function glBindFramebufferOES GL_FRAMEBUFFER_OES tbuffer glBindTexture.. setTargetToTexture function glBindFramebufferOES GL_FRAMEBUFFER_OES tbuffer glBindTexture GL_TEXTURE_2D allbrushes glViewport 0 0 512 512 reset pointers after finishing drawing to textures glViewport 0 0 BWIDTH BHEIGHT glVertexPointer 2 GL_FLOAT.. glBindTexture GL_TEXTURE_2D allbrushes glViewport 0 0 512 512 reset pointers after finishing drawing to textures glViewport 0 0 BWIDTH BHEIGHT glVertexPointer 2 GL_FLOAT 0 canvas canvas vertices glTexCoordPointer 2 GL_FLOAT 0 texels glBindTexture..

Can example “GLImageProcessing” work with multi filters

http://stackoverflow.com/questions/4375479/can-example-glimageprocessing-work-with-multi-filters

wide high 1 glBindTexture GL_TEXTURE_2D Input.texID bind result fbo glBindFramebufferOES GL_FRAMEBUFFER_OES resultFBO glViewport 0 0 result.wide result.s result.high result.t glClear GL_COLOR_BUFFER_BIT glDisable GL_BLEND process 1 adjust brightness..

Why is this OpenGL ES code slow on iPhone?

http://stackoverflow.com/questions/450042/why-is-this-opengl-es-code-slow-on-iphone

0.0f 0.0f 100.0f 0.0f 0.0f 100.0f 100.0f 100.0f const GLshort spriteTexcoords 0 0 1 0 0 1 1 1 void setupView glViewport 0 0 backingWidth backingHeight glMatrixMode GL_PROJECTION glLoadIdentity glOrthof 0.0f backingWidth backingHeight 0.0f 10.0f..

To upload the image file to a web form

http://stackoverflow.com/questions/5151004/to-upload-the-image-file-to-a-web-form

How can I crop an Image with mask and combine it with another image (background) on iPhone? (OpenGL ES 1.1 is preferred)

http://stackoverflow.com/questions/5299452/how-can-i-crop-an-image-with-mask-and-combine-it-with-another-image-background

GL_DEPTH_BUFFER_BIT glColor3f 1.0 1.0 1.0 renderMask renderTextures void reshape int width int height glViewport 0 0 width height glMatrixMode GL_PROJECTION glLoadIdentity gluOrtho2D 0.0 width 0.0 height glMatrixMode GL_MODELVIEW window_size..

Use of VAO around VBO in Open ES iPhone app Causes EXC_BAD_ACCESS When Call to glDrawElements

http://stackoverflow.com/questions/6240863/use-of-vao-around-vbo-in-open-es-iphone-app-causes-exc-bad-access-when-call-to-g

CADisplayLink displayLink glClearColor 0 104.0 255.0 55.0 255.0 1.0 glClear GL_COLOR_BUFFER_BIT GL_DEPTH_BUFFER_BIT glViewport 0 0 backingWidth backingHeight directProgram use glBindVertexArrayOES directArrayObject glDisable GL_DEPTH_TEST glActiveTexture..

GLImageProcessing Multiple Filters?

http://stackoverflow.com/questions/6425861/glimageprocessing-multiple-filters

GL_TEXTURE_2D ResultTexture 0 bind the result FBO glBindFramebufferOES GL_FRAMEBUFFER_OES ResultFBO apply 1st filter glViewport 0 0 wide high filter mode .func flipquad val restore original frame buffer object glBindFramebufferOES GL_FRAMEBUFFER_OES.. SystemFBO use ResultTexture as input for the 2nd filter glBindTexture GL_TEXTURE_2D ResultTexture apply 2nd filter glViewport 0 0 wide high filter 2 .func flipquad val glCheckError iphone opengl es filter share improve this question You can.. stage 0 glBindFramebufferOES GL_FRAMEBUFFER_OES stageFBO 1 glBindTexture GL_TEXTURE_2D stageTexture 0 apply 1st filter glViewport 0 0 wide high filter mode .func flipquad val glBindTexture GL_TEXTURE_2D 0 must unbind texture before FBO with that texture..

Save OpenGL Drawn item as a Image

http://stackoverflow.com/questions/9660723/save-opengl-drawn-item-as-a-image

self.contentScaleFactor Setup the view port in Pixels glOrthof 0 frame.size.width scale 0 frame.size.height scale 1 1 glViewport 0 0 frame.size.width scale frame.size.height scale glMatrixMode GL_MODELVIEW glDisable GL_DITHER glEnable GL_TEXTURE_2D..

Record the drawing as a m4v video file - OpenGL

http://stackoverflow.com/questions/9661259/record-the-drawing-as-a-m4v-video-file-opengl