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minimal text scale docs + reset on cls()

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Dennis Ranke
2024-04-10 00:03:54 +02:00
parent 285d9aee2c
commit d5ed809dc7
3 changed files with 12 additions and 3 deletions
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platform/bin/platform.uw8
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platform/src/platform.cwa
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@@ -62,6 +62,7 @@ export fn cls(col: i32) {
textCursorX = 0;
textCursorY = 0;
outputChannel = 0;
textScale = 1;
memory.fill(120, col, 320*240);
}

14
site/content/docs.md
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@@ -238,6 +238,13 @@ When printing characters only the foreground pixels are set, the background is "
Moving/printing past any border does not cause any special operation, the cursor just goes off-screen.
### Text scale
An integer text scale factor in the range 1x-16x can be set with control char 30. An attempt to
set a scale outside that range will reset the scale to 1x.
After startup and `cls` the scale is initialized to 1x.
### Control chars
Characters 0-31 are control characters and don't print by default. They take the next 0-2 following characters as parameters.
@@ -262,7 +269,8 @@ Avoid the reserved control chars, they are currently NOPs but their behavior can
| 15 | color | Set the text color |
| 16-23 | - | Reserved |
| 24 | - | Swap text/background colors |
| 25-30 | - | Reserved |
| 25-29 | - | Reserved |
| 30 | scale | Set text scale (1-16) |
| 31 | x, y | Set cursor position (*) |
(*) In graphics mode, the x coordinate is doubled when using control char 31 to be able to cover the whole screen with one byte.
@@ -271,7 +279,7 @@ Avoid the reserved control chars, they are currently NOPs but their behavior can
Control code 6 switches all text output (except codes 4 and 5 to switch output back to the screen) to the console. Where exactly this ends
up (if at all) is an implementation detail of the runtimes. The native dev-runtime writes the debug output to `stdout`, the web runtime to
the debug console using `console.log`. Both implementation buffer the output until they encounter a newline character (10) in the output stream.
the debug console using `console.log`. Both implementations buffer the output until they encounter a newline character (10) in the output stream.
There may be future runtimes that ignore the debug output completely.
@@ -626,4 +634,4 @@ Pressing F9 opens a download dialog with a screenshot.
## Devkit mode
Append `#devkit` to the web runtime url in order to switch to devkit mode. In devkit mode, standard web assembly modules
are loaded bypassing the loader, removing all size restrictions. At the same time, the memory limit is increased to 1GB.
are loaded bypassing the loader, removing all size restrictions. At the same time, the memory limit is increased to 1GB.