mirror of https://gitlab.com/camelot/kickc.git
85 lines
2.5 KiB
NASM
85 lines
2.5 KiB
NASM
// Example showing how to crunch and decrunch part of a file using the KickAss Cruncher Plugins
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// ByteBoozer example
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// https://github.com/p-a/kickass-cruncher-plugins
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// Commodore 64 PRG executable file - with the cruncher plugin enabled
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.plugin "se.triad.kickass.CruncherPlugins"
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.file [name="test-byteboozer.prg", type="prg", segments="Program"]
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.segmentdef Program [segments="Basic, Code, Data"]
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.segmentdef Basic [start=$0801]
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.segmentdef Code [start=$80d]
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.segmentdef Data [startAfter="Code"]
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.segment Basic
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:BasicUpstart(main)
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// The offset of the sprite pointers from the screen start address
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.const OFFSET_SPRITE_PTRS = $3f8
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.const GREEN = 5
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.const OFFSET_STRUCT_MOS6569_VICII_SPRITES_ENABLE = $15
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.label SPRITES_XPOS = $d000
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.label SPRITES_YPOS = $d001
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.label SPRITES_COLOR = $d027
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// The VIC-II MOS 6567/6569
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.label VICII = $d000
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// Default address of screen character matrix
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.label DEFAULT_SCREEN = $400
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// Address to decrunch the sprite to
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.label SPRITE = $2000
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// The sprite pointers
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.label SPRITES_PTR = DEFAULT_SCREEN+OFFSET_SPRITE_PTRS
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.segment Code
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main: {
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.const toSpritePtr1_return = SPRITE/$40
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// byteboozer_decrunch(CRUNCHED_SPRITE)
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lda #<CRUNCHED_SPRITE
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sta.z byteboozer_decrunch.crunched
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lda #>CRUNCHED_SPRITE
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sta.z byteboozer_decrunch.crunched+1
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// Decrunch sprite file into memory
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jsr byteboozer_decrunch
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// VICII->SPRITES_ENABLE = %00000001
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// Show the loaded sprite on screen
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lda #1
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sta VICII+OFFSET_STRUCT_MOS6569_VICII_SPRITES_ENABLE
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// SPRITES_PTR[0] = toSpritePtr(SPRITE)
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lda #toSpritePtr1_return
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sta SPRITES_PTR
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// SPRITES_COLOR[0] = GREEN
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lda #GREEN
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sta SPRITES_COLOR
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// SPRITES_XPOS[0] = 0x15
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lda #$15
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sta SPRITES_XPOS
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// SPRITES_YPOS[0] = 0x33
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lda #$33
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sta SPRITES_YPOS
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// }
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rts
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}
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// Decrunch crunched data using ByteBoozer
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// - crunched: Pointer to the start of the crunched data
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// byteboozer_decrunch(byte* zp(2) crunched)
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byteboozer_decrunch: {
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.label crunched = 2
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// asm
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ldy crunched
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ldx crunched+1
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jsr b2.Decrunch
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// }
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rts
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}
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.segment Data
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// The byteboozer decruncher
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BYTEBOOZER:
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.const B2_ZP_BASE = $fc
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#import "byteboozer_decrunch.asm"
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// Array with crunched data created using inline kickasm
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CRUNCHED_SPRITE:
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.modify B2() {
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.pc = SPRITE
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.var pic = LoadPicture("sprite.png", List().add($000000, $ffffff))
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.for (var y=0; y<21; y++)
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.for (var x=0;x<3; x++)
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.byte pic.getSinglecolorByte(x,y)
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}
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