两个图片正常混合效果图


fragment Shader

//正常的颜色混合uniformsampler2DU_MainTexture;uniformsampler2DU_SubTexture;varyingvec2M_coord;voidmain(){vec4blendColor=texture2D(U_SubTexture,M_coord);vec4baseColor=texture2D(U_MainTexture,M_coord);gl_FragColor=blendColor*blendColor.a+baseColor*(1-blendColor.a);}