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const char *colourfilterIII_frag_src =
"uniform sampler2D tex0;\n"
"uniform vec4 u_blurcolor;\n"
"in vec4 v_color;\n"
"in vec2 v_tex0;\n"
"in float v_fog;\n"
"out vec4 color;\n"
"void\n"
"main(void)\n"
"{\n"
" float a = u_blurcolor.a;\n"
" vec4 doublec = clamp(u_blurcolor*2, 0.0, 1.0);\n"
" vec4 dst = texture(tex0, vec2(v_tex0.x, 1.0-v_tex0.y));\n"
" vec4 prev = dst;\n"
" for(int i = 0; i < 5; i++){\n"
"// vec4 doublec = clamp(u_blurcolor*2, 0.0, 1.0);\n"
" vec4 tmp = dst*(1.0-a) + prev*doublec*a;\n"
" tmp += prev*u_blurcolor;\n"
" tmp += prev*u_blurcolor;\n"
" prev = clamp(tmp, 0.0, 1.0);\n"
" }\n"
" color.rgb = prev.rgb;\n"
" color.a = 1.0f;\n"
"}\n"
;
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