android - Landscape Background with OpenGL1.0 -

im bit confused power of 2 restriction opengles1.0/1.1

what image size should using decent quality landscape background tablet or mobile device?

i have tried 512 x 512 , 1024 x 1024, scaling wrong , image looks terrible.

android: 1.6,1.7

for such purposes create texture larger image, use texture sub image load data, create texture coordinates fit image.

try doing this:

float texturewidth = 1; float textureheight = 1; while(texturewidth < imagesize.width) texturewidth <<= 1; while(textureheight < imagesize.height) textureheight <<= 1; //create texture dimensions of texturewidth x textureheight (glteximage2d) //fill data imagesize parameters , raw data image (gltexsubimage) float texturecoordinatewidthratio = imagesize.width/(float)texturewidth; float texturecoordinateheightratio = imagesize.height/(float)textureheight; float texturecoordinates[] = {    .0, .0,    texturecoordinatewidthratio, .0,    .0, texturecoordinateheightratio,    texturecoordinatewidthratio, texturecoordinateheightratio }; 

now use data did before.

though did scaling wrong. if scaling mean ratio width/height wrong problem in ether vertex array (wrong coordinates) and/or "ortho" or "viewport". in case above solution have no effect. if result unclear background (or blurry), might solution looking might solved texture parameters.