1 files changed, 46 insertions, 0 deletions
diff --git a/source/blender/draw/engines/gpencil/shaders/gpencil_stroke_frag.glsl b/source/blender/draw/engines/gpencil/shaders/gpencil_stroke_frag.glsl
new file mode 100644
index 00000000000..d57921c1629
--- /dev/null
+++ b/source/blender/draw/engines/gpencil/shaders/gpencil_stroke_frag.glsl
@@ -0,0 +1,46 @@
+uniform int color_type;
+uniform sampler2D myTexture;
+
+in vec4 mColor;
+in vec2 mTexCoord;
+in float uvfac;
+
+out vec4 fragColor;
+
+#define texture2D texture
+
+/* keep this list synchronized with list in gpencil_engine.h */
+#define GPENCIL_COLOR_SOLID   0
+#define GPENCIL_COLOR_TEXTURE 1
+#define GPENCIL_COLOR_PATTERN 2
+
+void main()
+{
+	vec4 tColor = vec4(mColor);
+	/* if alpha < 0, then encap (only solid mode ) */
+	if ((mColor.a < 0) && (color_type == GPENCIL_COLOR_SOLID)) {
+		vec2 center = vec2(uvfac, 1.0);
+		tColor.a = tColor.a * -1.0;
+		float dist = length(mTexCoord - center);
+		if (dist > 0.50) {
+			discard;
+		}
+	}
+	/* Solid */
+	if (color_type == GPENCIL_COLOR_SOLID) {
+		fragColor = tColor;
+	}
+	/* texture */
+	if (color_type == GPENCIL_COLOR_TEXTURE) {
+		fragColor =  texture2D(myTexture, mTexCoord);
+		/* mult both alpha factor to use strength factor */
+		fragColor.a = min(fragColor.a * tColor.a, fragColor.a);
+	}
+	/* pattern */
+	if (color_type == GPENCIL_COLOR_PATTERN) {
+		vec4 text_color = texture2D(myTexture, mTexCoord);
+		fragColor = tColor;
+		/* mult both alpha factor to use strength factor with color alpha limit */
+		fragColor.a = min(text_color.a * tColor.a, tColor.a);
+	}
+}