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| author | Kartik Agaram <vc@akkartik.com> | 2021-01-19 22:17:05 -0800 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2021-01-19 22:48:49 -0800 |
| commit | 7363c6dfd3cf2104d7e3a0e814cde2d8b4f4e6ce (patch) | |
| tree | e0f2114917851fac0107eec5cb6cbdaf0556af5f /baremetal | |
| parent | 6ce43fce4f288fda97e4034abc512e03d0304177 (diff) | |
| download | mu-7363c6dfd3cf2104d7e3a0e814cde2d8b4f4e6ce.tar.gz | |
7537 - baremetal: start of cursor support
Diffstat (limited to 'baremetal')
| -rw-r--r-- | baremetal/103grapheme.subx | 8 | ||||
| -rw-r--r-- | baremetal/400.mu | 2 | ||||
| -rw-r--r-- | baremetal/500text-screen.mu | 7 |
3 files changed, 10 insertions, 7 deletions
diff --git a/baremetal/103grapheme.subx b/baremetal/103grapheme.subx index b17f60a1..f854e03d 100644 --- a/baremetal/103grapheme.subx +++ b/baremetal/103grapheme.subx @@ -5,7 +5,7 @@ == code -draw-grapheme-on-real-screen: # g: grapheme, x: int, y: int, color: int +draw-grapheme-on-real-screen: # g: grapheme, x: int, y: int, color: int, background-color: int # . prologue 55/push-ebp 89/<- %ebp 4/r32/esp @@ -45,14 +45,14 @@ draw-grapheme-on-real-screen: # g: grapheme, x: int, y: int, color: int 7c/jump-if-< break/disp8 # shift LSB from row-bitmap into carry flag (CF) c1 5/subop/shift-right-logical %ebx 1/imm8 - # if LSB, draw a pixel + # if LSB, draw a pixel in the given color { 73/jump-if-not-CF break/disp8 (pixel-on-real-screen %eax %edx *(ebp+0x14)) eb/jump $draw-grapheme-on-real-screen:continue/disp8 } - # otherwise draw a black pixel - (pixel-on-real-screen %eax %edx 0) + # otherwise use the background color + (pixel-on-real-screen %eax %edx *(ebp+0x18)) $draw-grapheme-on-real-screen:continue: # --x 48/decrement-eax diff --git a/baremetal/400.mu b/baremetal/400.mu index 4dfb9951..8db62837 100644 --- a/baremetal/400.mu +++ b/baremetal/400.mu @@ -1,6 +1,6 @@ # screen sig pixel-on-real-screen x: int, y: int, color: int -sig draw-grapheme-on-real-screen g: grapheme, x: int, y: int, color: int +sig draw-grapheme-on-real-screen g: grapheme, x: int, y: int, color: int, background-color: int sig cursor-position-on-real-screen -> _/eax: int, _/ecx: int sig set-cursor-position-on-real-screen x: int, y: int diff --git a/baremetal/500text-screen.mu b/baremetal/500text-screen.mu index e6004cad..96c6644f 100644 --- a/baremetal/500text-screen.mu +++ b/baremetal/500text-screen.mu @@ -1,4 +1,5 @@ -# Screen primitives for character-oriented output. +# Testable primitives for writing text to screen. +# (Mu doesn't yet have testable primitives for graphics.) # # Unlike the top-level, this text mode has no scrolling. @@ -61,11 +62,13 @@ fn screen-size screen: (addr screen) -> _/eax: int, _/ecx: int { return width, height } +# testable screen primitive +# background color isn't configurable yet fn draw-grapheme screen: (addr screen), g: grapheme, x: int, y: int, color: int { { compare screen, 0 break-if-!= - draw-grapheme-on-real-screen g, x, y, color + draw-grapheme-on-real-screen g, x, y, color, 0 return } # fake screen |