mirror of
https://github.com/cc65/cc65.git
synced 2024-12-23 19:29:37 +00:00
Worked on text scaling. This is an intermediate version which doesn't work.
git-svn-id: svn://svn.cc65.org/cc65/trunk@5089 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
uz
parent
928f675e4b
commit
83d67e930a
@ -27,16 +27,14 @@ _tgi_color: .res 1 ; Current drawing color
|
||||
_tgi_font: .res 1 ; Which font to use
|
||||
_tgi_textdir: .res 1 ; Current text direction
|
||||
_tgi_vectorfont: .res 2 ; Pointer to vector font
|
||||
; The following two store an 8.8 fixed point value in the first two bytes,
|
||||
; and a rounded integer value in the third byte. The latter is passed to the
|
||||
; driver to scale the bitmap font. The variables are expected to be in
|
||||
; this order and adjacent.
|
||||
_tgi_textscalew: .res 3 ; Text scale for the width
|
||||
_tgi_textscaleh: .res 3 ; Text scale for the height
|
||||
|
||||
; The following two must also be in exactly this order
|
||||
_tgi_charwidth: .res 1 ; Char width of system font
|
||||
_tgi_charheight: .res 1 ; Char height of system font
|
||||
; The following are character scale/size variables in 8.8 fixed point
|
||||
; format. They are required to be in this order and adjacent.
|
||||
_tgi_textscalew: .res 2 ; Vector font width scale
|
||||
.res 2 ; Bitmap font width scale
|
||||
_tgi_charwidth: .res 2 ; Full width of one bitmap char
|
||||
_tgi_textscaleh: .res 2 ; Vector font height scale
|
||||
.res 2 ; Bitmap font height scale
|
||||
_tgi_charheight: .res 2 ; Full height of one bitmap char
|
||||
|
||||
; End of section that gets cleared when a new driver is loaded
|
||||
csize = * - cstart
|
||||
@ -45,7 +43,7 @@ csize = * - cstart
|
||||
_tgi_xmax: .res 2
|
||||
_tgi_ymax: .res 2
|
||||
|
||||
; The following variables are copied from the driver header for faster access
|
||||
; The following variables are copied from the driver header for faster access.
|
||||
; fontwidth and fontheight are expected to be in order and adjacent.
|
||||
tgi_driver_vars:
|
||||
_tgi_xres: .res 2 ; X resolution of the current mode
|
||||
|
||||
@ -3,29 +3,13 @@
|
||||
;
|
||||
|
||||
|
||||
.include "zeropage.inc"
|
||||
.include "tgi-kernel.inc"
|
||||
|
||||
.import umul8x16r24
|
||||
.import popa, popax
|
||||
|
||||
|
||||
;-----------------------------------------------------------------------------
|
||||
; Calculate either the total height or the total width of a bitmapped
|
||||
; character, depending on the value in Y. On entry, X contains the scaling
|
||||
; factor. Since it is usually small, we multiplicate by doing repeated adds.
|
||||
; The function returns zero in X and the calculated value in A.
|
||||
|
||||
.proc charsize_helper
|
||||
|
||||
lda _tgi_fontwidth,y
|
||||
jmp @L2
|
||||
@L1: clc
|
||||
adc _tgi_fontwidth,y
|
||||
@L2: dex
|
||||
bne @L1
|
||||
sta _tgi_charwidth,y
|
||||
rts
|
||||
|
||||
.endproc
|
||||
.macpack cpu
|
||||
|
||||
;-----------------------------------------------------------------------------
|
||||
; void __fastcall__ tgi_textstyle (unsigned width, unsigned height,
|
||||
@ -57,43 +41,65 @@
|
||||
|
||||
.proc _tgi_textscale
|
||||
|
||||
; The height value is in 8.8 fixed point. Store it and calculate a rounded
|
||||
; value for scaling the bitmapped system font in the driver.
|
||||
; Setup the height
|
||||
|
||||
sta _tgi_textscaleh+0
|
||||
stx _tgi_textscaleh+1
|
||||
asl a ; Check value behind comma
|
||||
ldy _tgi_fontheight ; Get height of bitmap font in pixels
|
||||
sty ptr1 ; Save for later
|
||||
ldy #6 ; Address the height
|
||||
jsr process_onedim ; Process height
|
||||
|
||||
; Setup the width
|
||||
|
||||
jsr popax ; Get width scale into a/x
|
||||
ldy _tgi_fontwidth ; Get width of bitmap font in pixels
|
||||
sty ptr1 ; Save for later
|
||||
ldy #0 ; Address the width
|
||||
|
||||
; Process one character dimension. That means:
|
||||
;
|
||||
; - Store the vector font dimension in 8.8 format
|
||||
; - If necessary, round up/down to next integer
|
||||
; - Store the bitmap font dimension in 8.8 format
|
||||
; - Multiply by size of bitmap char in pixels
|
||||
; - Store the bitmap font size in 8.8 format
|
||||
;
|
||||
|
||||
process_onedim:
|
||||
|
||||
jsr store ; Store vector font scale factor
|
||||
bit _tgi_flags ; Fine grained scaling support avail?
|
||||
bmi @L2 ; Jump if yes
|
||||
|
||||
asl a ; Round to nearest full integer
|
||||
bcc @L1
|
||||
inx ; Round
|
||||
@L1: stx _tgi_textscaleh+2 ; Store rounded value
|
||||
inx
|
||||
@L1: lda #0
|
||||
|
||||
; Calculate the total height of the bitmapped font and remember it.
|
||||
@L2: jsr store ; Store bitmap font scale factor
|
||||
|
||||
ldy #1
|
||||
jsr charsize_helper
|
||||
; The size of the font in pixels in the selected dimension is already in ptr1
|
||||
; So if we call umul8x16r24 we get the size in pixels in 16.8 fixed point.
|
||||
; Disallowing characters larger than 256 pixels, we just drop the high byte
|
||||
; and remember the low 16 bit as size in 8.8 format.
|
||||
|
||||
; The width value is in 8.8 fixed point. Store it and calculate a rounded
|
||||
; value for scaling the bitmapped system font in the driver.
|
||||
.if (.cpu .bitand ::CPU_ISET_65SC02)
|
||||
phy ; Save Y
|
||||
jsr umul8x16r24
|
||||
ply ; Restore Y
|
||||
.else
|
||||
sty tmp1 ; Save Y
|
||||
jsr umul8x16r24
|
||||
ldy tmp1 ; Restore Y
|
||||
.endif
|
||||
|
||||
jsr popax ; height
|
||||
sta _tgi_textscalew+0
|
||||
stx _tgi_textscalew+1
|
||||
asl a ; Check value behind comma
|
||||
bcc @L2
|
||||
inx ; Round
|
||||
@L2: stx _tgi_textscalew+2 ; Store rounded value
|
||||
|
||||
; Calculate the total width of the bitmapped font and remember it.
|
||||
|
||||
ldy #0
|
||||
jsr charsize_helper
|
||||
|
||||
; Load values and call the driver, parameters are passed in registers
|
||||
|
||||
ldx _tgi_textscalew+2
|
||||
ldy _tgi_textscaleh+2
|
||||
lda _tgi_textdir
|
||||
jmp tgi_textstyle
|
||||
store: sta _tgi_textscalew,y
|
||||
iny
|
||||
pha
|
||||
txa
|
||||
sta _tgi_textscalew,y
|
||||
iny
|
||||
pla
|
||||
rts
|
||||
|
||||
.endproc
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user