pspgu blur

#define PART_WIDTH 192
#define PART_HEIGHT 108
void blurScreen()
    {
    if (!initialized) return;

    sceGuTexFilter(GU_LINEAR,GU_LINEAR);
    tVertex* vertices = sceGuGetMemory(3 * 2 * sizeof(tVertex));
    sceGuTexMode(GU_PSM_8888,0,0,0);
    sceGuTexImage(0,getNextPower2(SCREEN_WIDTH),getNextPower2(SCREEN_WIDTH),getNextPower2(SCREEN_WIDTH),(void*)getVramDrawBuffer());
    vertices[0].u = 0;
    vertices[0].v = 0;
    vertices[0].x = 0;
    vertices[0].y = 0;
    vertices[0].z = 0;
    vertices[1].u = SCREEN_WIDTH;
    vertices[1].v = SCREEN_HEIGHT;
    vertices[1].x = PART_WIDTH;
    vertices[1].y = PART_HEIGHT;
    vertices[1].z = 0;
    vertices[2].u = 0;
    vertices[2].v = 0;
    vertices[2].x = SCREEN_WIDTH-PART_WIDTH;
    vertices[2].y = SCREEN_HEIGHT-PART_HEIGHT;
    vertices[2].z = 0;
    vertices[3].u = PART_WIDTH;
    vertices[3].v = PART_HEIGHT;
    vertices[3].x = SCREEN_WIDTH;
    vertices[3].y = SCREEN_HEIGHT;
    vertices[3].z = 0;
    vertices[4].u = SCREEN_WIDTH-PART_WIDTH;
    vertices[4].v = SCREEN_HEIGHT-PART_HEIGHT;
    vertices[4].x = 0;
    vertices[4].y = 0;
    vertices[4].z = 0;
    vertices[5].u = SCREEN_WIDTH;
    vertices[5].v = SCREEN_HEIGHT;
    vertices[5].x = SCREEN_WIDTH;
    vertices[5].y = SCREEN_HEIGHT;
    vertices[5].z = 0;
    sceGuEnable(GU_BLEND);
    sceGuEnable(GU_TEXTURE_2D);
    sceGuDisable(GU_DEPTH_TEST);
    sceGuDrawArray(GU_SPRITES, GU_TEXTURE_16BIT | GU_VERTEX_16BIT | GU_TRANSFORM_2D, 3*2, 0, vertices);
    sceGuEnable(GU_BLEND);
    }