added command line arguments support

main.py

@@ -1,6 +1,29 @@
+import argparse
+
 from schema import InstructionSetSchema
 
+description = """Examples:
+    - Default theme (black on white):
+        python main.py schema.xml -o out.jpg
+
+    - Dark theme (white on black):
+        python main.py schema.xml -o out.jpg -c dark.json
+
+    - Blueprint theme (white on blue):
+        python main.py schema.xml -o out.jpg -c blueprint.json
+
+    - Transparent background:
+        python main.py schema.xml -o out.png -c transparent.json
+"""
+
 if __name__ == "__main__":
-    schema = InstructionSetSchema("example1.yaml")
-    schema.save("example1_v2.jpg")
-    input()
+    parser = argparse.ArgumentParser(description=description, formatter_class=argparse.RawTextHelpFormatter)
+    parser.add_argument("schema", help="Path to the schema description. Accepted formats are: YAML, JSON and XML")
+    parser.add_argument("-o", "--output", help="Output path", default="out.jpg")
+    parser.add_argument("-c", "--config", help="Path to the config file", default="config.json")
+    parser.add_argument("-D", "--display", help="Enable pygame display of the result", action="store_true")
+    
+    args = parser.parse_args()
+    
+    schema = InstructionSetSchema(args.schema, args.config, args.display)
+    schema.save(args.output)

renderer.py

@@ -1,4 +1,5 @@
 from __future__ import annotations
+import os
 from typing import TYPE_CHECKING
 if TYPE_CHECKING:
     from config import Config
@@ -14,25 +15,33 @@ class Renderer:
     WIDTH = 1200
     HEIGHT = 800
     
-    def __init__(self, config: Config) -> None:
+    def __init__(self, config: Config, display: bool = False) -> None:
         self.config = config
+        self.display = display
         pygame.init()
-        self.win = pygame.display.set_mode([Renderer.WIDTH, Renderer.HEIGHT])
+        if self.display:
+            self.win = pygame.display.set_mode([Renderer.WIDTH, Renderer.HEIGHT])
+        
+        self.surf = pygame.Surface([Renderer.WIDTH, Renderer.HEIGHT], pygame.SRCALPHA)
         self.font = pygame.font.SysFont(self.config.DEFAULT_FONT_FAMILY, self.config.DEFAULT_FONT_SIZE)
         self.italicFont = pygame.font.SysFont(self.config.ITALIC_FONT_FAMILY, self.config.ITALIC_FONT_SIZE, italic=True)
         
         self.margins = self.config.MARGINS
     
     def render(self, schema: InstructionSetSchema) -> None:
-        
-        self.win.fill(self.config.BACKGROUND_COLOR)
+        self.surf.fill(self.config.BACKGROUND_COLOR)
         
         self.drawStructure(schema.structures["main"], schema.structures, self.margins[3], self.margins[0])
         
-        pygame.display.flip()
+        if self.display:
+            name = os.path.basename(schema.path)
+            pygame.display.set_caption(f"Rivet - {name}")
+            self.win.fill(self.config.BACKGROUND_COLOR)
+            self.win.blit(self.surf, [0, 0])
+            pygame.display.flip()
     
     def save(self, path: str) -> None:
-        pygame.image.save(self.win, path)
+        pygame.image.save(self.surf, path)
     
     def drawStructure(self,
                       struct: Structure,
@@ -52,20 +61,20 @@ class Renderer:
         startBit = struct.start
         
         # Draw rectangle around structure
-        pygame.draw.rect(self.win, borderCol, [bitsX, bitsY, bitsWidth, bitH], 2)
+        pygame.draw.rect(self.surf, borderCol, [bitsX, bitsY, bitsWidth, bitH], 2)
         
         for i in range(struct.bits):
             bitX = ox + i * bitW
             
             bitITxt = self.font.render(str(struct.bits - i - 1 + startBit), True, txtCol)
-            self.win.blit(bitITxt, [
+            self.surf.blit(bitITxt, [
                 bitX + (bitW - bitITxt.get_width())/2,
                 oy + (bitH - bitITxt.get_height())/2
             ])
             
             # Draw separator
             if i != 0:
-                pygame.draw.line(self.win, borderCol, [bitX, bitsY], [bitX, bitsY + bitH])
+                pygame.draw.line(self.surf, borderCol, [bitX, bitsY], [bitX, bitsY + bitH])
         
         ranges = struct.getSortedRanges()
         descX = ox + max(0, (struct.bits-12) * bitW)
@@ -81,8 +90,8 @@ class Renderer:
             nameTxt = self.font.render(range_.name, True, txtCol)
             nameX = rStartX + (rWidth - nameTxt.get_width())/2
             nameY = bitsY + (bitH - nameTxt.get_height())/2
-            pygame.draw.rect(self.win, bgCol, [rStartX + bitW/2, nameY, rWidth - bitW, nameTxt.get_height()], 0)
-            self.win.blit(nameTxt, [nameX, nameY])
+            pygame.draw.rect(self.surf, bgCol, [rStartX + bitW/2, nameY, rWidth - bitW, nameTxt.get_height()], 0)
+            self.surf.blit(nameTxt, [nameX, nameY])
 
             if range_.description:
                 descX, descY = self.drawDescription(range_, rStartX, bitsY, rWidth, descX, descY)
@@ -103,7 +112,7 @@ class Renderer:
         y0 = bitsY + bitH * 1.25
         y1 = bitsY + bitH * 1.5
         
-        pygame.draw.lines(self.win, self.config.LINK_COLOR, False, [
+        pygame.draw.lines(self.surf, self.config.LINK_COLOR, False, [
             [x0, y0],
             [x0, y1],
             [x1, y1],
@@ -114,7 +123,7 @@ class Renderer:
         bitH = self.config.BIT_HEIGHT
         arrowMargin = self.config.ARROW_MARGIN
         
-        pygame.draw.lines(self.win, self.config.LINK_COLOR, False, [
+        pygame.draw.lines(self.surf, self.config.LINK_COLOR, False, [
             [startX, startY + bitH*1.5],
             [startX, endY + bitH/2],
             [endX - arrowMargin, endY + bitH/2]
@@ -139,7 +148,7 @@ class Renderer:
         self.drawLink(midX, rStartY, descX, descY)
         
         descTxt = self.font.render(range_.description, True, self.config.TEXT_COLOR)
-        self.win.blit(descTxt, [descX, descY + (bitH - descTxt.get_height())/2])
+        self.surf.blit(descTxt, [descX, descY + (bitH - descTxt.get_height())/2])
         
         descY += descTxt.get_height()
         
@@ -158,7 +167,7 @@ class Renderer:
         for val, desc in sorted(values.items(), key=lambda vd: vd[0]):
             descY += gap
             valTxt = self.italicFont.render(f"{val} = {desc}", True, textCol)
-            self.win.blit(valTxt, [descX + bitW/2, descY])
+            self.surf.blit(valTxt, [descX + bitW/2, descY])
             descY += valTxt.get_height()
         
         return (descX, descY)
@@ -243,21 +252,21 @@ class Renderer:
         for i in range(dashes):
             a = start + d * i * (dashLen + dashSpace)
             b = a + d*dashLen
-            pygame.draw.line(self.win, linkCol, [a.x, a.y], [b.x, b.y])
+            pygame.draw.line(self.surf, linkCol, [a.x, a.y], [b.x, b.y])
         
         n = Vec(d.y, -d.x)
         
         width = arrowSize / 1.5
         p1 = end - d * arrowSize + n * width
         p2 = end - d * arrowSize - n * width
-        pygame.draw.polygon(self.win, linkCol, [
+        pygame.draw.polygon(self.surf, linkCol, [
             [end.x, end.y],
             [p1.x, p1.y],
             [p2.x, p2.y]], 0)
         
         if label:
             txt = self.italicFont.render(label, True, textCol)
-            self.win.blit(txt, [
+            self.surf.blit(txt, [
                 (start.x + end.x - txt.get_width())/2,
                 (start.y + end.y)/2 + arrowLabelDist
             ])

schema.py

@@ -13,8 +13,9 @@ class UnsupportedFormatException(Exception):
 class InstructionSetSchema:
     VALID_EXTENSIONS = ("yaml", "json", "xml")
     
-    def __init__(self, path: str, configPath: str = "config.json") -> None:
+    def __init__(self, path: str, configPath: str = "config.json", display: bool = False) -> None:
         self.config = Config(configPath)
+        self.display = display
         self.path = path
         self.load()
     
@@ -43,6 +44,8 @@ class InstructionSetSchema:
             self.structures[id_] = Structure.load(id_, data)
     
     def save(self, path: str) -> None:
-        renderer = Renderer(self.config)
+        renderer = Renderer(self.config, self.display)
         renderer.render(self)
-        renderer.save(path)
+        renderer.save(path)
+        if self.display:
+            input("Press ENTER to quit")

transparent.json

@@ -0,0 +1,7 @@
+{
+    "backgroundColor": [0, 0, 0, 0],
+    "textColor": [128, 128, 128],
+    "linkColor": [128, 128, 128],
+    "bitIColor": [128, 128, 128],
+    "borderColor": [128, 128, 128]
+}