+/* Copy images to graphics memory */
+static void _conus_update_end_copy(GisTile *tile, guchar *pixels)
+{
+ if (!tile->data) {
+ tile->data = g_new0(guint, 1);
+ glGenTextures(1, tile->data);
+ }
+
+ guint *tex = tile->data;
+ glBindTexture(GL_TEXTURE_2D, *tex);
+
+ glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+ glPixelStorei(GL_PACK_ALIGNMENT, 1);
+ glTexImage2D(GL_TEXTURE_2D, 0, 4, 2048, 2048, 0,
+ GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+ glTexSubImage2D(GL_TEXTURE_2D, 0, 1,1, CONUS_WIDTH/2,CONUS_HEIGHT,
+ GL_RGBA, GL_UNSIGNED_BYTE, pixels);
+ tile->coords.n = 1.0/(CONUS_WIDTH/2);
+ tile->coords.w = 1.0/ CONUS_HEIGHT;
+ tile->coords.s = tile->coords.n + CONUS_HEIGHT / 2048.0;
+ tile->coords.e = tile->coords.w + (CONUS_WIDTH/2) / 2048.0;
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
+ glFlush();
+}
+
+/* Split the pixbuf into east and west halves (with 2K sides)
+ * Also map the pixbuf's alpha values */
+static void _conus_update_end_split(guchar *pixels, guchar *west, guchar *east,
+ gint width, gint height, gint pxsize)
+{
+ g_debug("GisPluginRadar: _conus_update_thread - split");
+ guchar *out[] = {west,east};
+ const guchar alphamap[][4] = {
+ {0x04, 0xe9, 0xe7, 0x30},
+ {0x01, 0x9f, 0xf4, 0x60},
+ {0x03, 0x00, 0xf4, 0x90},
+ };
+ for (int y = 0; y < height; y++)
+ for (int x = 0; x < width; x++) {
+ gint subx = x % (width/2);
+ gint idx = x / (width/2);
+ guchar *src = &pixels[(y*width+x)*pxsize];
+ guchar *dst = &out[idx][(y*(width/2)+subx)*4];
+ if (src[0] > 0xe0 &&
+ src[1] > 0xe0 &&
+ src[2] > 0xe0) {
+ dst[3] = 0x00;
+ } else {
+ dst[0] = src[0];
+ dst[1] = src[1];
+ dst[2] = src[2];
+ dst[3] = 0xff;
+ for (int j = 0; j < G_N_ELEMENTS(alphamap); j++)
+ if (src[0] == alphamap[j][0] &&
+ src[1] == alphamap[j][1] &&
+ src[2] == alphamap[j][2])
+ dst[3] = alphamap[j][3];
+ }
+ }
+}
+