1 files changed, 41 insertions, 0 deletions
diff --git a/src/example/04_bloom/postprocess.c b/src/example/04_bloom/postprocess.c
new file mode 100644
index 0000000..1ec10e4
--- /dev/null
+++ b/src/example/04_bloom/postprocess.c
@@ -0,0 +1,41 @@
+#include "../../shaders/common.h"
+
+/*uniforms*/
+#define _frag_tex    UTEX(0)
+#define _bright_tex  UTEX(1)
+
+/*varyings*/
+#define _texcoord reg_v2_00
+
+static float weight[5] = { 0.2270270270, 0.1945945946, 0.1216216216, 0.0540540541, 0.0162162162 };
+
+static void vert(UniformCollection* uniforms, VertexShaderIn* in, Vec4* clipcoord) {
+	clipcoord->xyz = in->vertex->position;
+	clipcoord->w = 1;
+	*_texcoord = in->vertex->texcoord;
+}
+
+static bool frag(UniformCollection* uniforms, FragmentShaderIn* in, Color32* color) {
+	float off = 1 / 600.f;
+	//blur
+	*color = tex2d(_frag_tex, _texcoord);
+	vec4_scale(color, weight[0], color);
+	Vec2 p = {0, _texcoord->y};
+	Color32 c;
+	for (int i = 1; i < 5; ++i) {
+		p.x = _texcoord->x + off * i;
+		c = tex2d(_frag_tex, &p);
+		vec4_scale(&c, weight[i], &c);
+		vec4_add(color, &c, color);
+		p.x = _texcoord->x - off * i;
+		c = tex2d(_frag_tex, &p);
+		vec4_scale(&c, weight[i], &c);
+		vec4_add(color, &c, color);
+	}
+	return 1;
+}
+
+Program _04_bloom_postprocess = {
+	vert, frag,
+	VARYING_V2_00
+};