Fix some tests and do some cleanup.

test/large_block.inx

@@ -0,0 +1,42 @@
+p :: properties {
+	color         : float4;
+	rect_position : float2;
+	rect_scale    : float2;
+	resolution    : float2;
+	texture       : Texture2D;
+	sampler       : Sampler;
+}
+
+PS_Input :: struct {
+	uv : float2 @uv;
+	pos : float4 @pos;
+}
+
+vertex main :: (pos : float4 @position) -> PS_Input {
+	res      : float2 = p.resolution;
+	scale    : float2 = p.rect_scale;
+	rect_pos : float2 = p.rect_position;;
+
+	center : float2 = rect_pos;
+	half_size  : float2 = float2(scale.x / 2, scale.y / 2);
+	dst_pos    : float4 = float4(pos.x * half_size.x + center.x, pos.y * half_size.y + center.y, 0.0, 1.0);
+
+	result : PS_Input;
+
+	src_p0 : float2 = float2(0.0, 1.0);
+	src_p1 : float2 = float2(1.0, 0.0);
+
+	src_half_size : float2 = (src_p1 - src_p0) / 2;
+	src_center    : float2 = (src_p1 + src_p0) / 2;
+	src_pos       : float2 = float2(pos.x, pos.y) * src_half_size + src_center;
+
+	result.uv = float2(1, 1);
+	result.pos = float4(2.0 * dst_pos.x / res.x - 1, 2.0 * dst_pos.y / res.y - 1, 0.0, 1.0);
+
+	return result;
+}
+
+pixel main :: (input : PS_Input) -> float4 @target0 {
+	color : float4 = p.color;
+	return color;
+}