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out vec4 outcolor;
in vec2 frag_texture_coord;
uniform sampler2D crt_texture;
uniform sampler2D bloom_texture;
uniform float bloom_strength;
uniform vec2 bloom_size;
uniform vec2 src_image_size;
uniform vec2 viewport_size;
void main() {
vec3 crt_color = texture(crt_texture, frag_texture_coord).rgb;
vec3 bloom_color = texture(bloom_texture, frag_texture_coord).rgb;
// Calculate warp boundary mask to clip bloom outside CRT area
vec2 ipos = frag_texture_coord * viewport_size;
// Convert to normalized device coordinates [-1, 1]
vec2 pos = ipos * (2.0 / viewport_size) - vec2(1.0);
// Apply barrel distortion
vec2 warp = vec2(1.0 / 24.0, 1.0 / 16.0);
pos *= vec2(1.0 + (pos.y * pos.y) * warp.x, 1.0 + (pos.x * pos.x) * warp.y);
// Convert back to UV
vec2 uv = (pos + vec2(1.0)) * 0.5;
// Rounded corner cutoff (CRT bezel effect) - only clips the corners
float corner_radius = 0.05; // Radius of corner rounding (0.0 = sharp corners, 0.2 = very rounded)
vec2 edge_distance = abs(pos) - vec2(1.0 - corner_radius);
float dist = length(max(edge_distance, 0.0));
// Antialiased edge using smoothstep (creates soft 1-2 pixel transition)
float edge_softness = 0.003; // Controls antialiasing width (smaller = sharper)
float mask = smoothstep(corner_radius + edge_softness, corner_radius - edge_softness, dist);
// Also check bounds
mask *= (uv.x >= 0.0 && uv.x <= 1.0 && uv.y >= 0.0 && uv.y <= 1.0) ? 1.0 : 0.0;
outcolor = vec4((crt_color + bloom_color * bloom_strength) * mask, 1.0);
}
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