Hi !
I would like to compress my texture files on the fly so :
I check the extension :
if (GLEW_ARB_texture_compression)
printf("support texture compression !
");
else
printf("doesn't support texture compression !
");
I load my 1024*1024 uncompressed texture :
glGenTextures(1, &compTexture);
glBindTexture(GL_TEXTURE_2D, compTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_COMPRESSED_RGBA_ARB, (GLsizei)imageWidth, (GLsizei)imageHeight, 0, GL_RGB, GL_UNSIGNED_BYTE, imageBuffer);
Opengl give me that the texture is not compressed (return 0) :
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_COMPRESSED_ARB, &texParams);
But when I check the internal format I obtain GL_COMRESSED_RGBA :
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_INTERNAL_FORMAT, &texFormat);
And I get an error (not updated Glint texSize) if I query the image size :
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_COMPRESSED_IMAGE_SIZE_ARB, &texSize);
Any idees what’s happen ? (excuse me for my English)