shader.fsh.c

varying LOWP vec2 texcoord;

uniform sampler2D bgl_RenderedTexture;

float samples[11];


void main()
{
  /*vec2 texcoord = gl_TexCoord[0].xy*/
samples[0] = 0.0222244;
samples[1] = 0.0378346;
samples[2] = 0.0755906;
samples[3] = 0.1309775;
samples[4] = 0.1756663;
samples[5] = 0.1974126;
samples[6] = 0.1756663;
samples[7] = 0.1309775;
samples[8] = 0.0755906;
samples[9] = 0.0378346;
samples[10] = 0.0222244;

vec4 sum = vec4(0);
/*vec2 texcoord = vec2(gl_TexCoord[0]);*/
float width = 0.004; // width = how wide of a sample to use (is repeated 16 times below (4 times horizontally, 4 times for each of those vertically)
// Usually 0.004, but as can be seen below, sum would USUALLY be calculated 8 * 8 times (absurd CPU drain); should probably be around 0.001

sum += texture2D(bgl_RenderedTexture, texcoord + vec2(-4, -4)*width) * samples[0];
sum += texture2D(bgl_RenderedTexture, texcoord + vec2(-2, -4)*width) * samples[2];
sum += texture2D(bgl_RenderedTexture, texcoord + vec2(0, -4)*width) * samples[4];
sum += texture2D(bgl_RenderedTexture, texcoord + vec2(2, -4)*width) * samples[6];

sum += texture2D(bgl_RenderedTexture, texcoord + vec2(-4, -2)*width) * samples[0];
sum += texture2D(bgl_RenderedTexture, texcoord + vec2(-2, -2)*width) * samples[2];
sum += texture2D(bgl_RenderedTexture, texcoord + vec2(0, -2)*width) * samples[4];
sum += texture2D(bgl_RenderedTexture, texcoord + vec2(2, -2)*width) * samples[6];

sum += texture2D(bgl_RenderedTexture, texcoord + vec2(-4, 0)*width) * samples[0];
sum += texture2D(bgl_RenderedTexture, texcoord + vec2(-2, 0)*width) * samples[2];
sum += texture2D(bgl_RenderedTexture, texcoord + vec2(0, 0)*width) * samples[4];
sum += texture2D(bgl_RenderedTexture, texcoord + vec2(2, 0)*width) * samples[6];

sum += texture2D(bgl_RenderedTexture, texcoord + vec2(-4, 2)*width) * samples[0];
sum += texture2D(bgl_RenderedTexture, texcoord + vec2(-2, 2)*width) * samples[2];
sum += texture2D(bgl_RenderedTexture, texcoord + vec2(0, 2)*width) * samples[4];
sum += texture2D(bgl_RenderedTexture, texcoord + vec2(2, 2)*width) * samples[6];

//for( i= -4 ;i < 4; i++) // The sixteen sum instructions above replace these for loops
//{
// for( j= -4 ;j < 4; j++)
// {
// sum += texture2D(bgl_RenderedTexture, texcoord + vec2(j, i)*0.004) * samples[j+4];
// }
// }


gl_FragColor = sum*0.32 + texture2D(bgl_RenderedTexture, texcoord); // Usually sum*0.08; 0.08 < is how bright the bloom effect appears on the screen; should probably be around 0.32
}