Lines Matching defs:alpha
158 guint alpha = src[x] >> 24;
160 if (!alpha) {
165 destData[x * 4 + 0] = (((src[x] & 0xff0000) >> 16) * 255 + alpha / 2) / alpha;
166 destData[x * 4 + 1] = (((src[x] & 0x00ff00) >> 8) * 255 + alpha / 2) / alpha;
167 destData[x * 4 + 2] = (((src[x] & 0x0000ff) >> 0) * 255 + alpha / 2) / alpha;
169 destData[x * 4 + 3] = alpha;
214 * will contain an alpha channel if the @surface contains one.