SurfaceHelper.java 文件源码

public static void drawOutlinedRect(int x, int y, int w, int h, int color, float width) {
    float r = (float)(color >> 16 & 255) / 255.0F;
    float g = (float)(color >> 8 & 255) / 255.0F;
    float b = (float)(color & 255) / 255.0F;
    float a = (float)(color >> 24 & 255) / 255.0F;
    Tessellator tessellator = Tessellator.getInstance();
    BufferBuilder BufferBuilder = tessellator.getBuffer();

    GlStateManager.enableBlend();
    GlStateManager.disableTexture2D();
    GlStateManager.tryBlendFuncSeparate(GlStateManager.SourceFactor.SRC_ALPHA, GlStateManager.DestFactor.ONE_MINUS_SRC_ALPHA, GlStateManager.SourceFactor.ONE, GlStateManager.DestFactor.ZERO);
    GlStateManager.color(r, g, b, a);

    GL11.glLineWidth(width);

    BufferBuilder.begin(GL11.GL_LINE_LOOP, DefaultVertexFormats.POSITION);
    BufferBuilder.pos((double)x, (double)y, 0.0D).endVertex();
    BufferBuilder.pos((double)x, (double)y + h, 0.0D).endVertex();
    BufferBuilder.pos((double)x + w, (double)y + h, 0.0D).endVertex();
    BufferBuilder.pos((double)x + w, (double)y, 0.0D).endVertex();
    tessellator.draw();

    GlStateManager.enableTexture2D();
    GlStateManager.disableBlend();
}