iphone Programming Glossary: gl_texture_env_mode
Applying brightness and contrast with OpenGL ES http://stackoverflow.com/questions/1506299/applying-brightness-and-contrast-with-opengl-es calling both methods in the sample overwrites the previous result . Brightness works great glTexEnvi GL_TEXTURE_ENV GL_TEXTURE_ENV_MODE GL_COMBINE if brightness 1.0f glTexEnvi GL_TEXTURE_ENV GL_COMBINE_RGB GL_ADD glColor4f brightness 1 brightness 1 brightness.. 2 GL_FLOAT sizeof V2fT2f quad 0 .x glTexCoordPointer 2 GL_FLOAT sizeof V2fT2f quad 0 .s glTexEnvi GL_TEXTURE_ENV GL_TEXTURE_ENV_MODE GL_COMBINE glTexEnvi GL_TEXTURE_ENV GL_COMBINE_RGB GL_MODULATE glTexEnvi GL_TEXTURE_ENV GL_SRC0_RGB GL_TEXTURE glTexEnvi.. GL_TEXTURE_ENV GL_SRC0_ALPHA GL_TEXTURE glActiveTexture GL_TEXTURE1 glEnable GL_TEXTURE_2D glTexEnvi GL_TEXTURE_ENV GL_TEXTURE_ENV_MODE GL_COMBINE glTexEnvi GL_TEXTURE_ENV GL_COMBINE_RGB GL_ADD_SIGNED glTexEnvi GL_TEXTURE_ENV GL_SRC0_RGB GL_PREVIOUS glTexEnvi..
How do I create blurred text in an iPhone view? http://stackoverflow.com/questions/227305/how-do-i-create-blurred-text-in-an-iphone-view 2 GL_FLOAT sizeof V2fT2f quad 0 .x glTexCoordPointer 2 GL_FLOAT sizeof V2fT2f quad 0 .s glTexEnvi GL_TEXTURE_ENV GL_TEXTURE_ENV_MODE GL_MODULATE glColor4f 1.0 5 1.0 5 1.0 5 1.0 validateTexEnv glDrawArrays GL_TRIANGLE_STRIP 0 4 Pass two accumulate two rotated.. offw tmpquad i .t quad i .t 0.5 offh glTexCoordPointer 2 GL_FLOAT sizeof V2fT2f tmpquad 0 .x glTexEnvi GL_TEXTURE_ENV GL_TEXTURE_ENV_MODE GL_REPLACE glActiveTexture GL_TEXTURE1 glEnable GL_TEXTURE_2D glClientActiveTexture GL_TEXTURE1 glTexCoordPointer 2 GL_FLOAT.. tmpquad 0 .s glEnableClientState GL_TEXTURE_COORD_ARRAY glBindTexture GL_TEXTURE_2D tex glTexEnvi GL_TEXTURE_ENV GL_TEXTURE_ENV_MODE GL_COMBINE glTexEnvi GL_TEXTURE_ENV GL_COMBINE_RGB GL_INTERPOLATE glTexEnvi GL_TEXTURE_ENV GL_SRC0_RGB GL_TEXTURE glTexEnvi..
OpenGL ES 1.1: How to change texture color without losing luminance? http://stackoverflow.com/questions/4361023/opengl-es-1-1-how-to-change-texture-color-without-losing-luminance glActiveTexture GL_TEXTURE0 glEnable GL_TEXTURE_2D glBindTexture GL_TEXTURE_2D spriteTexture glTexEnvi GL_TEXTURE_ENV GL_TEXTURE_ENV_MODE GL_MODULATE glActiveTexture GL_TEXTURE1 glEnable GL_TEXTURE_2D glBindTexture GL_TEXTURE_2D spriteTexture glTexEnvi GL_TEXTURE_ENV.. glActiveTexture GL_TEXTURE1 glEnable GL_TEXTURE_2D glBindTexture GL_TEXTURE_2D spriteTexture glTexEnvi GL_TEXTURE_ENV GL_TEXTURE_ENV_MODE GL_ADD What it does is multiply the original texture by the specified color and then adds the pixels values of the original..
Can example “GLImageProcessing” work with multi filters http://stackoverflow.com/questions/4375479/can-example-glimageprocessing-work-with-multi-filters GL_FLOAT sizeof V2fT2f flipquad 0 .x glTexCoordPointer 2 GL_FLOAT sizeof V2fT2f flipquad 0 .s glTexEnvi GL_TEXTURE_ENV GL_TEXTURE_ENV_MODE GL_COMBINE static GLfloat constColor 4 0.1 0.2 0.3 0.4 if t 1.0f glTexEnvi GL_TEXTURE_ENV GL_COMBINE_RGB GL_ADD glColor4f.. GL_FLOAT sizeof V2fT2f flipquad 0 .x glTexCoordPointer 2 GL_FLOAT sizeof V2fT2f flipquad 0 .s glTexEnvi GL_TEXTURE_ENV GL_TEXTURE_ENV_MODE GL_COMBINE glTexEnvi GL_TEXTURE_ENV GL_COMBINE_RGB GL_MODULATE glTexEnvi GL_TEXTURE_ENV GL_SRC0_RGB GL_PREVIOUS glTexEnvi.. GL_PREVIOUS glDisable GL_TEXTURE_2D glActiveTexture GL_TEXTURE2 glEnable GL_TEXTURE_2D glTexEnvi GL_TEXTURE_ENV GL_TEXTURE_ENV_MODE GL_COMBINE glTexEnvi GL_TEXTURE_ENV GL_COMBINE_RGB GL_ADD_SIGNED glTexEnvi GL_TEXTURE_ENV GL_SRC0_RGB GL_PREVIOUS glTexEnvi..
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