shaderir: Fix the initial variable values on GLSL

This is for consistency with number literals we are introducing.

Updates #1190

internal/shader/testdata/assign.expected.vs

@@ -1,5 +1,5 @@
 void F0(in vec2 l0, out vec4 l1) {
-	float l2 = 0.0;
+	float l2 = float(0);
 	l2 = 0.000000000e+00;
 	l2 = (l2) + (1.000000000e+00);
 	l1 = vec4(l0, l2, l2);

internal/shader/testdata/assign_multiple.expected.vs

@@ -1,8 +1,8 @@
 void F0(in vec2 l0, out vec4 l1) {
-	float l2 = 0.0;
-	float l3 = 0.0;
-	float l4 = 0.0;
-	float l5 = 0.0;
+	float l2 = float(0);
+	float l3 = float(0);
+	float l4 = float(0);
+	float l5 = float(0);
 	F1(l4, l5);
 	l2 = l4;
 	l3 = l5;

internal/shader/testdata/blocks.expected.vs

@@ -1,15 +1,15 @@
 void F0(in vec2 l0, out vec4 l1) {
-	vec4 l2 = vec4(0.0);
+	vec4 l2 = vec4(0);
 	{
-		vec3 l3 = vec3(0.0);
+		vec3 l3 = vec3(0);
 		(l2).x = (l0).x;
 		{
-			vec4 l4 = vec4(0.0);
+			vec4 l4 = vec4(0);
 			(l2).y = (l3).y;
 			(l2).z = (l4).z;
 		}
 		{
-			vec4 l4 = vec4(0.0);
+			vec4 l4 = vec4(0);
 			(l2).y = (l3).y;
 			(l2).z = (l4).z;
 		}

internal/shader/testdata/call.expected.vs

@@ -1,5 +1,5 @@
 void F0(in vec2 l0, out vec2 l1) {
-	vec2 l2 = vec2(0.0);
+	vec2 l2 = vec2(0);
 	F1(l0, l2);
 	l1 = l2;
 	return;

internal/shader/testdata/call_multiple.expected.vs

@@ -1,8 +1,8 @@
 void F0(in vec2 l0, out vec2 l1) {
-	float l2 = 0.0;
-	float l3 = 0.0;
-	float l4 = 0.0;
-	float l5 = 0.0;
+	float l2 = float(0);
+	float l3 = float(0);
+	float l4 = float(0);
+	float l5 = float(0);
 	F1((l0).x, (l0).y, l2, l3);
 	l4 = l2;
 	l5 = l3;

internal/shader/testdata/call_multiple_nested.expected.vs

@@ -1,8 +1,8 @@
 void F0(in vec2 l0) {
-	float l1 = 0.0;
-	float l2 = 0.0;
-	float l3 = 0.0;
-	float l4 = 0.0;
+	float l1 = float(0);
+	float l2 = float(0);
+	float l3 = float(0);
+	float l4 = float(0);
 	F1((l0).x, (l0).y, l1, l2);
 	F1(l1, l2, l3, l4);
 }

internal/shader/testdata/define.expected.vs

@@ -1,5 +1,5 @@
 void F0(in vec2 l0, out vec4 l1) {
-	vec4 l2 = vec4(0.0);
+	vec4 l2 = vec4(0);
 	l2 = vec4(l0, 0.0, 1.0);
 	l1 = l2;
 	return;

internal/shader/testdata/define_multiple.expected.vs

@@ -1,8 +1,8 @@
 void F0(in vec2 l0, out vec4 l1) {
-	float l2 = 0.0;
-	float l3 = 0.0;
-	float l4 = 0.0;
-	float l5 = 0.0;
+	float l2 = float(0);
+	float l3 = float(0);
+	float l4 = float(0);
+	float l5 = float(0);
 	F1(l4, l5);
 	l2 = l4;
 	l3 = l5;

internal/shader/testdata/define_type.expected.vs

@@ -1,5 +1,5 @@
 void F0(in vec2 l0, out vec4 l1) {
-	vec4 l2 = vec4(0.0);
+	vec4 l2 = vec4(0);
 	l2 = (vec4(0.000000000e+00)) * (vec4(0.000000000e+00));
 	l1 = l2;
 	return;

internal/shader/testdata/var.expected.vs

@@ -1,5 +1,5 @@
 void F0(in vec2 l0, out vec4 l1) {
-	vec4 l2 = vec4(0.0);
+	vec4 l2 = vec4(0);
 	l2 = vec4(l0, 0.0, 1.0);
 	l1 = l2;
 	return;

internal/shader/testdata/var2.expected.vs

@@ -1,6 +1,6 @@
 void F0(in vec2 l0, out vec4 l1) {
-	vec4 l2 = vec4(0.0);
-	vec4 l3 = vec4(0.0);
+	vec4 l2 = vec4(0);
+	vec4 l3 = vec4(0);
 	l2 = vec4(l0, 0.0, 1.0);
 	(l2).x = (l2).x;
 	l3 = l2;

internal/shader/testdata/var_multiple.expected.vs

@@ -1,6 +1,6 @@
 void F0(in vec2 l0, out vec4 l1) {
-	vec2 l2 = vec2(0.0);
-	vec2 l3 = vec2(0.0);
+	vec2 l2 = vec2(0);
+	vec2 l3 = vec2(0);
 	l2 = l0;
 	l3 = l0;
 	l1 = vec4(l2, l3);

internal/shader/testdata/vertex.expected.vs

@@ -6,7 +6,7 @@ varying vec2 V0;
 varying vec4 V1;
 
 void main(void) {
-	mat4 l0 = mat4(0.0);
+	mat4 l0 = mat4(0);
 	l0 = mat4((2.0) / ((U0).x), 0.0, 0.0, 0.0, 0.0, (2.0) / ((U0).y), 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, -(1.0), -(1.0), 0.0, 1.0);
 	gl_Position = (l0) * (vec4(A0, 0.0, 1.0));
 	V0 = A1;

internal/shader/testdata/vertex_fragment.expected.vs

@@ -6,7 +6,7 @@ varying vec2 V0;
 varying vec4 V1;
 
 void main(void) {
-	mat4 l0 = mat4(0.0);
+	mat4 l0 = mat4(0);
 	l0 = mat4((2.0) / ((U0).x), 0.0, 0.0, 0.0, 0.0, (2.0) / ((U0).y), 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, -(1.0), -(1.0), 0.0, 1.0);
 	gl_Position = (l0) * (vec4(A0, 0.0, 1.0));
 	V0 = A1;

internal/shaderir/glsl.go

@@ -180,19 +180,19 @@ func (p *Program) glslVarInit(t *Type) string {
 	case Int:
 		return "0"
 	case Float:
-		return "0.0"
+		return "float(0)"
 	case Vec2:
-		return "vec2(0.0)"
+		return "vec2(0)"
 	case Vec3:
-		return "vec3(0.0)"
+		return "vec3(0)"
 	case Vec4:
-		return "vec4(0.0)"
+		return "vec4(0)"
 	case Mat2:
-		return "mat2(0.0)"
+		return "mat2(0)"
 	case Mat3:
-		return "mat3(0.0)"
+		return "mat3(0)"
 	case Mat4:
-		return "mat4(0.0)"
+		return "mat4(0)"
 	default:
 		panic(fmt.Sprintf("?(unexpected type: %s)", p.glslType(t)))
 	}

internal/shaderir/ir_test.go

@@ -290,12 +290,12 @@ varying vec3 V0;`,
 				},
 			},
 			GlslVS: `void F0(in float l0, out float l1) {
-	mat4 l2 = mat4(0.0);
-	mat4 l3 = mat4(0.0);
+	mat4 l2 = mat4(0);
+	mat4 l3 = mat4(0);
 }`,
 			GlslFS: `void F0(in float l0, out float l1) {
-	mat4 l2 = mat4(0.0);
-	mat4 l3 = mat4(0.0);
+	mat4 l2 = mat4(0);
+	mat4 l3 = mat4(0);
 }`,
 		},
 		{
@@ -328,19 +328,19 @@ varying vec3 V0;`,
 				},
 			},
 			GlslVS: `void F0(in float l0, out float l1) {
-	mat4 l2 = mat4(0.0);
-	mat4 l3 = mat4(0.0);
+	mat4 l2 = mat4(0);
+	mat4 l3 = mat4(0);
 	{
-		mat4 l4 = mat4(0.0);
-		mat4 l5 = mat4(0.0);
+		mat4 l4 = mat4(0);
+		mat4 l5 = mat4(0);
 	}
 }`,
 			GlslFS: `void F0(in float l0, out float l1) {
-	mat4 l2 = mat4(0.0);
-	mat4 l3 = mat4(0.0);
+	mat4 l2 = mat4(0);
+	mat4 l3 = mat4(0);
 	{
-		mat4 l4 = mat4(0.0);
-		mat4 l5 = mat4(0.0);
+		mat4 l4 = mat4(0);
+		mat4 l5 = mat4(0);
 	}
 }`,
 		},
@@ -737,8 +737,8 @@ varying float V0;
 varying vec2 V1;
 
 void main(void) {
-	float l0 = 0.0;
-	vec2 l1 = vec2(0.0);
+	float l0 = float(0);
+	vec2 l1 = vec2(0);
 	gl_FragColor = gl_FragCoord;
 	l0 = V0;
 	l1 = V1;