mirror of
https://github.com/irmen/prog8.git
synced 2024-12-23 09:32:43 +00:00
bmx: allow palette to be loaded into memory buffer instead of vram
This commit is contained in:
Irmen de Jong
parent
c45fbe6310
commit
45debff89f
@ -1,7 +1,6 @@
|
||||
; Routines to load and save "BMX" files (commander X16 bitmap format) Version 1.
|
||||
; Only uncompressed images are supported for now.
|
||||
; BMX Specification: https://cx16forum.com/forum/viewtopic.php?t=6945
|
||||
; TODO: make read_palette() and write_palette() use an optional palette_buffer_ptr to store palette into system ram instead of directly into vram.
|
||||
|
||||
%import diskio
|
||||
|
||||
@ -19,9 +18,10 @@ bmx {
|
||||
ubyte palette_start
|
||||
ubyte compression
|
||||
|
||||
uword error_message ; pointer to error message, or 0 if all ok
|
||||
uword max_width = 0 ; should you want load() to check for this
|
||||
uword max_height = 0 ; should you want load() to check for this
|
||||
uword error_message ; pointer to error message, or 0 if all ok
|
||||
uword max_width = 0 ; should you want load() to check for this
|
||||
uword max_height = 0 ; should you want load() to check for this
|
||||
uword palette_buffer_ptr = 0 ; should you want to load the palette into main memory instead of directly into vram
|
||||
|
||||
sub load(ubyte drivenumber, str filename, ubyte vbank, uword vaddr, uword screen_width) -> bool {
|
||||
; Loads a BMX bitmap image and palette into vram. (and Header info into the bmx.* variables)
|
||||
@ -189,11 +189,21 @@ save_end:
|
||||
|
||||
sub read_palette() -> bool {
|
||||
; load palette data from the currently active input file
|
||||
; if palette_buffer_ptr is not 0, the palette data is read into that memory buffer,
|
||||
; otherwise it is read directly into the palette in vram.
|
||||
cx16.vaddr(1, $fa00+palette_start*2, 0, 1)
|
||||
cx16.r1 = palette_buffer_ptr
|
||||
cx16.r0L = palette_entries
|
||||
do {
|
||||
cx16.VERA_DATA0 = cbm.CHRIN()
|
||||
cx16.VERA_DATA0 = cbm.CHRIN()
|
||||
cx16.r2L = cbm.CHRIN()
|
||||
cx16.r2H = cbm.CHRIN()
|
||||
if cx16.r1 {
|
||||
pokew(cx16.r1, cx16.r2) ; into memory
|
||||
cx16.r1+=2
|
||||
} else {
|
||||
cx16.VERA_DATA0 = cx16.r2L ; into vram
|
||||
cx16.VERA_DATA0 = cx16.r2H
|
||||
}
|
||||
cx16.r0L--
|
||||
} until cx16.r0L==0
|
||||
return not cbm.READST()
|
||||
|
||||
@ -2,6 +2,8 @@
|
||||
TODO
|
||||
====
|
||||
|
||||
- optimize 6502 codegen: "for 0 to end" into repeat loops. (only for ubyte and uword, 6502 cpu)
|
||||
|
||||
- [on branch: shortcircuit] investigate McCarthy evaluation again? this may also reduce code size perhaps for things like if a>4 or a<2 ....
|
||||
|
||||
...
|
||||
|
||||
@ -1,8 +1,12 @@
|
||||
|
||||
; viewer program for BMX image files.
|
||||
; see https://cx16forum.com/forum/viewtopic.php?t=6945
|
||||
; Viewer program for BMX image files.
|
||||
; This program shows *one* way to do it, by checking the header upfront,
|
||||
; and loading the palette into system ram first. The simplest way to load
|
||||
; a BMX file is to just read everything into vram directly using a single bmx.load() call.
|
||||
;
|
||||
; BMX file format: see https://cx16forum.com/forum/viewtopic.php?t=6945
|
||||
|
||||
%import textio
|
||||
%import palette
|
||||
%import bmx
|
||||
%option no_sysinit
|
||||
%zeropage basicsafe
|
||||
@ -15,20 +19,29 @@ main {
|
||||
txt.print("\nenter bmx image filename: ")
|
||||
if txt.input_chars(&filename) {
|
||||
if bmx.load_header(8, filename) {
|
||||
txt.print("\nwidth: ")
|
||||
txt.print("\nsize: ")
|
||||
txt.print_uw(bmx.width)
|
||||
txt.print("\nheight: ")
|
||||
txt.chrout('*')
|
||||
txt.print_uw(bmx.height)
|
||||
txt.print("\nbpp: ")
|
||||
txt.print(" bpp: ")
|
||||
txt.print_uw(bmx.bitsperpixel)
|
||||
txt.nl()
|
||||
sys.wait(100)
|
||||
|
||||
; tell the loader to put the palette into system memory instead
|
||||
; also make palette black at first, to hide loading (even though it is very fast)
|
||||
; (you could do a soft fade-in effect with this for instance)
|
||||
bmx.palette_buffer_ptr = memory("palette", 512, 0)
|
||||
sys.memset(bmx.palette_buffer_ptr, 512, 0)
|
||||
palette.set_rgb(bmx.palette_buffer_ptr, 256)
|
||||
|
||||
; switch to correct screen mode and color depth
|
||||
void cx16.screen_mode($80, false)
|
||||
cx16.VERA_L0_CONFIG = cx16.VERA_L0_CONFIG & %11111100 | bmx.vera_colordepth
|
||||
; actually load
|
||||
|
||||
; now load the image
|
||||
if bmx.load(8, filename, 0, 0, 320) {
|
||||
activate_palette()
|
||||
void txt.waitkey()
|
||||
}
|
||||
}
|
||||
@ -44,4 +57,17 @@ main {
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
sub activate_palette() {
|
||||
; copies the pallette data from the memory buffer into vram
|
||||
cx16.r1 = bmx.palette_buffer_ptr
|
||||
cx16.r2L = bmx.palette_start
|
||||
cx16.r3L = bmx.palette_entries
|
||||
do {
|
||||
palette.set_color(cx16.r2L, peekw(cx16.r1))
|
||||
cx16.r1+=2
|
||||
cx16.r2L++
|
||||
cx16.r3L--
|
||||
} until cx16.r3L==0
|
||||
}
|
||||
}
|
||||
|
||||
114
examples/test.p8
114
examples/test.p8
@ -2,61 +2,79 @@
|
||||
%zeropage basicsafe
|
||||
|
||||
main {
|
||||
ubyte counter
|
||||
uword wcounter
|
||||
ubyte end=10
|
||||
uword wend=10
|
||||
|
||||
sub start() {
|
||||
cx16.r0=0
|
||||
forloops()
|
||||
txt.print_uw(cx16.r0)
|
||||
txt.nl()
|
||||
|
||||
txt.print("for:\n")
|
||||
for cx16.r0L in 10 to 20 {
|
||||
txt.print_ub(cx16.r0L)
|
||||
txt.print(" before...")
|
||||
if cx16.r0L > 15
|
||||
break
|
||||
if cx16.r0L ==14
|
||||
continue
|
||||
txt.print("after\n")
|
||||
cx16.r0=0
|
||||
untilloops()
|
||||
txt.print_uw(cx16.r0)
|
||||
txt.nl()
|
||||
}
|
||||
|
||||
sub forloops() {
|
||||
end=10
|
||||
for counter in 0 to end {
|
||||
cx16.r0++
|
||||
}
|
||||
txt.nl()
|
||||
|
||||
txt.print("repeat:\n")
|
||||
cx16.r0L=10
|
||||
repeat 10 {
|
||||
cx16.r0L++
|
||||
txt.print_ub(cx16.r0L)
|
||||
txt.print(" before...")
|
||||
if cx16.r0L > 15
|
||||
break
|
||||
if cx16.r0L ==14
|
||||
continue
|
||||
txt.print("after\n")
|
||||
end=0
|
||||
for counter in 0 to end {
|
||||
cx16.r0++
|
||||
}
|
||||
txt.nl()
|
||||
|
||||
txt.print("while:\n")
|
||||
cx16.r0L=10
|
||||
while cx16.r0L<20 {
|
||||
cx16.r0L++
|
||||
txt.print_ub(cx16.r0L)
|
||||
txt.print(" before...")
|
||||
if cx16.r0L > 15
|
||||
break
|
||||
if cx16.r0L ==14
|
||||
continue
|
||||
txt.print("after\n")
|
||||
end=255
|
||||
for counter in 0 to end {
|
||||
cx16.r0++
|
||||
}
|
||||
txt.nl()
|
||||
|
||||
txt.print("until:\n")
|
||||
cx16.r0L=10
|
||||
do {
|
||||
cx16.r0L++
|
||||
txt.print_ub(cx16.r0L)
|
||||
txt.print(" before...")
|
||||
if cx16.r0L > 15
|
||||
wend=1000
|
||||
for wcounter in 0 to wend {
|
||||
cx16.r0++
|
||||
}
|
||||
}
|
||||
|
||||
sub untilloops() {
|
||||
|
||||
end=10
|
||||
counter = 0
|
||||
repeat {
|
||||
cx16.r0++
|
||||
if counter==end
|
||||
break
|
||||
if cx16.r0L ==14
|
||||
continue
|
||||
txt.print("after\n")
|
||||
} until cx16.r0L>20
|
||||
txt.nl()
|
||||
counter++
|
||||
}
|
||||
|
||||
end=0
|
||||
counter = 0
|
||||
repeat {
|
||||
cx16.r0++
|
||||
if counter==end
|
||||
break
|
||||
counter++
|
||||
}
|
||||
|
||||
counter = 0
|
||||
end=255
|
||||
repeat {
|
||||
cx16.r0++
|
||||
if counter==end
|
||||
break
|
||||
counter++
|
||||
}
|
||||
|
||||
wcounter = 0
|
||||
wend=1000
|
||||
repeat {
|
||||
cx16.r0++
|
||||
if wcounter==wend
|
||||
break
|
||||
wcounter++
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user