Rearrangement and refactoring and optimizations and more accuracy

1 files changed, 38 insertions, 0 deletions

diff --git a/shaders/gl_bloom_composite_fragment.glsl b/shaders/gl_bloom_composite_fragment.glsl
new file mode 100644
index 0000000..5977e91
--- /dev/null
+++ b/shaders/gl_bloom_composite_fragment.glsl
@@ -0,0 +1,38 @@
+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);
+}