Added backdrop effects pipeline (blur)

draw/examples/hellope.odin

@@ -48,8 +48,7 @@ hellope_shapes :: proc() {
 		draw.rectangle(
 			base_layer,
 			{20, 160, 460, 60},
-			{255, 0, 0, 255},
-			gradient = draw.Linear_Gradient{end_color = {0, 0, 255, 255}, angle = 0},
+			draw.Linear_Gradient{start_color = {255, 0, 0, 255}, end_color = {0, 0, 255, 255}, angle = 0},
 		)
 
 		// ----- Rotation demos -----
@@ -79,18 +78,18 @@ hellope_shapes :: proc() {
 		)
 
 		// Ellipse rotating around its center (tilted ellipse)
-		draw.ellipse(base_layer, {410, 340}, 50, 30, {255, 200, 50, 255}, rotation = spin_angle)
+		draw.ellipse(base_layer, {410, 340}, 50, 30, draw.Color{255, 200, 50, 255}, rotation = spin_angle)
 
 		// Circle orbiting a point (moon orbiting planet)
 		// Convention B: center = pivot point (planet), origin = offset from moon center to pivot.
 		// Moon's visual center at rotation=0: planet_pos - origin = (100, 450) - (0, 40) = (100, 410).
 		planet_pos := draw.Vec2{100, 450}
-		draw.circle(base_layer, planet_pos, 8, {200, 200, 200, 255}) // planet (stationary)
+		draw.circle(base_layer, planet_pos, 8, draw.Color{200, 200, 200, 255}) // planet (stationary)
 		draw.circle(
 			base_layer,
 			planet_pos,
 			5,
-			{100, 150, 255, 255},
+			draw.Color{100, 150, 255, 255},
 			origin = draw.Vec2{0, 40},
 			rotation = spin_angle,
 		) // moon orbiting
@@ -101,7 +100,7 @@ hellope_shapes :: proc() {
 			draw.Vec2{250, 450},
 			0,
 			30,
-			{100, 100, 220, 255},
+			draw.Color{100, 100, 220, 255},
 			start_angle = 0,
 			end_angle = 270,
 			rotation = spin_angle,
@@ -127,7 +126,7 @@ hellope_shapes :: proc() {
 			{460, 450},
 			6,
 			30,
-			{180, 100, 220, 255},
+			draw.Color{180, 100, 220, 255},
 			outline_color = draw.WHITE,
 			outline_width = 2,
 			rotation = spin_angle,
@@ -190,14 +189,7 @@ hellope_text :: proc() {
 		)
 
 		// Uncached text (no id) — created and destroyed each frame, simplest usage
-		draw.text(
-			base_layer,
-			"Top-left anchored",
-			{20, 450},
-			PLEX_SANS_REGULAR,
-			FONT_SIZE,
-			color = draw.WHITE,
-		)
+		draw.text(base_layer, "Top-left anchored", {20, 450}, PLEX_SANS_REGULAR, FONT_SIZE, color = draw.WHITE)
 
 		// Measure text for manual layout
 		size := draw.measure_text("Measured!", PLEX_SANS_REGULAR, FONT_SIZE)