Tweak the docs

src/element.toit

@@ -7,7 +7,7 @@ import bitmap show *
 import .four-gray as four-gray
 import .true-color as true-color
 import .gray-scale as gray-scale
-import .one-byte as one-byte
+import .one-byte_ as one-byte
 import .style show *
 import .pixel-display
 import font show Font

src/four-gray.toit

@@ -3,16 +3,16 @@
 // found in the LICENSE file.
 
 /**
-Constants useful for $PixelDisplay.four-gray.
+Constants useful for $pixel-display.PixelDisplay.four-gray.
 For use with e-paper displays with four tones of gray.
 */
 
 import bitmap show *
 import font show Font
 
 import .pixel-display
-import .two-bit-texture
-import .two-bit-texture as two-bit
+import .pixel-display as pixel-display
+import .two-bit_ as two-bit
 
 /// Color value for use with $PixelDisplay.four-gray.
 WHITE ::= 0

src/gray-scale.toit

@@ -3,13 +3,17 @@
 // found in the LICENSE file.
 
 /**
-Constants useful for $PixelDisplay.gray-scale.
+Constants useful for $pixel-display.PixelDisplay.gray-scale.
+These are displays with 8-bit pixels, where each pixel is a gray-scale value
+  from 0 (black) to 255 (white).
 */
 
 import bitmap show *
 import font show Font
+
 import .pixel-display
-import .one-byte
+import .pixel-display as pixel-display
+import .one-byte_
 
 /// Color value for use with $PixelDisplay.gray-scale.
 WHITE ::= 255

src/pixel-display.toit

@@ -15,12 +15,12 @@ import .bar-code
 import .element
 import .two-color as two-color
 import .three-color as three-color
-import .two-bit-texture as two-bit
+import .two-bit_ as two-bit
 import .four-gray as four-gray
 import .true-color as true-color
 import .gray-scale as gray-scale
 import .several-color as several-color
-import .one-byte as one-byte
+import .one-byte_ as one-byte
 import .style
 
 FLAG-2-COLOR ::=         0b1
@@ -749,9 +749,24 @@ abstract class Canvas:
   */
   abstract create-similar -> Canvas
 
+  /**
+  Sets all pixels in the canvas to the given color.
+  For true-color canvases, the color has the form 0xRRGGBB.
+  For gray-scale canvases, the color has the form 0xGG.
+  For other canvases types, constants are defined in their respective import
+    files.
+  */
   abstract set-all-pixels color/int -> none
 
+  /**
+  Returns true for true-color and gray-scale canvases that support
+    8-bit drawing methods.
+  */
   abstract supports-8-bit -> bool
+
+  /**
+  Returns true for gray-scale canvases and two-color black/white canvases.
+  */
   abstract gray-scale -> bool
 
   /**
@@ -924,8 +939,7 @@ abstract class Canvas:
     descenders or starts with a character like "J" or "/", which in many fonts
     extend to the left of their origin.
   */
-  abstract text x/int y/int --text/string --color/int --font/Font --orientation/int
-  abstract text x/int y/int --text/string --color/int --font/Font
+  abstract text x/int y/int --text/string --color/int --font/Font --orientation/int=0
 
   /**
   Draws the given bitmap on the canvas.

src/several-color.toit

@@ -4,7 +4,7 @@
 
 import bitmap show *
 import font show Font
-import .one-byte
+import .one-byte_
 import .two-color as two-color
 import .pixel-display
 

src/style.toit

@@ -7,7 +7,7 @@ import bitmap show ORIENTATION-0 ORIENTATION-90 ORIENTATION-180 ORIENTATION-270
 import font show Font
 
 import .element as element
-import .one-byte as one-byte
+import .one-byte_ as one-byte
 import .pixel-display
 
 ALIGN-LEFT ::= 0

src/three-color.toit

@@ -3,15 +3,15 @@
 // found in the LICENSE file.
 
 /**
-Constants useful for $PixelDisplay.three-color.
+Constants useful for $pixel-display.PixelDisplay.three-color.
 For use with e-paper black, white, and red displays.
 */
 
 import font show Font
 
 import .pixel-display
-import .two-bit-texture
-import .two-bit-texture as two-bit
+import .pixel-display as pixel-display
+import .two-bit_ as two-bit
 
 WHITE ::= 0
 BLACK ::= 1

src/true-color.toit

@@ -3,14 +3,18 @@
 // found in the LICENSE file.
 
 /**
-Functions and constants useful for the RGB $PixelDisplay.true-color display.
+Functions and constants useful for the RGB
+  $pixel-display.PixelDisplay.true-color display.
+See for example https://pkg.toit.io/search?query=color-tft
 */
 
 import binary show BIG-ENDIAN
 import bitmap show *
 import font show Font
+
 import .gray-scale as gray-scale_
 import .pixel-display
+import .pixel-display as pixel-display
 
 /**
 Create a 24 bit color from three components in the 0-255 range.

src/two-color.toit

@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 /**
-Constants useful for black-and-white $PixelDisplay.two-color.
+Constants useful for black-and-white $pixel-display.PixelDisplay.two-color.
 For use with e-paper displays and the SSD1306 128x64 display
   (driver at https://pkg.toit.io/package/ssd1306&url=github.com%2Ftoitware%2Ftoit-ssd1306&index=latest)
 */
@@ -12,10 +12,10 @@ import bitmap show *
 import font show Font
 
 import .pixel-display
+import .pixel-display as pixel-display
 
 WHITE ::= 0
 BLACK ::= 1
-TRANSPARENT ::= 3
 
 // The canvas contains a bitmapped ByteArray.
 // Starts off with/ all pixels white.

tests/texture-test-slow.toit

@@ -1,4 +1,4 @@
-// Copyright (C) 2020 Toitware ApS.
+// Copyright (C) 2023 Toitware ApS.
 // Use of this source code is governed by a Zero-Clause BSD license that can
 // be found in the TESTS_LICENSE file.
 
@@ -10,7 +10,7 @@ import font show *
 
 import pixel-display show Transform
 import pixel-display.four-gray
-import pixel-display.two-bit-texture as two-bit
+import pixel-display.two-bit_ as two-bit
 import pixel-display.three-color
 import pixel-display.true-color
 import pixel-display.two-color