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https://github.com/irmen/prog8.git
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gfx2: changed screen mode numbering to a more intuitive sequence
This commit is contained in:
Irmen de Jong
parent
857f930dc2
commit
52f6be2bb0
@ -6,28 +6,32 @@
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; Note: for compatible graphics code that words on C64 too, use the "graphics" module instead.
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; Note: there is no color palette manipulation here, you have to do that yourself or use the "palette" module.
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; SCREEN MODE LIST:
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; mode 0 = reset back to default text mode
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; mode 1 = bitmap 320 x 240 monochrome
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; mode 2 = bitmap 320 x 240 x 4c (unsupported TODO not yet implemented)
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; mode 3 = bitmap 320 x 240 x 16c (unsupported TODO not yet implemented)
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; mode 4 = bitmap 320 x 240 x 256c
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; mode 5 = bitmap 640 x 480 monochrome
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; mode 6 = bitmap 640 x 480 x 4c (unsupported TODO not yet implemented)
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; mode 7 = bitmap 640 x 480 x 16c (unsupported due to lack of VRAM)
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; mode 8 = bitmap 640 x 480 x 256c (unsupported due to lack of VRAM)
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; TODO can we make a FB vector table and emulation routines for the Cx16s' GRAPH_init() call? to replace the builtin 320x200 fb driver?
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gfx2 {
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; read-only control variables:
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ubyte active_mode = 255
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ubyte active_mode = 0
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uword width = 0
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uword height = 0
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ubyte bpp = 0
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ubyte monochrome_dont_stipple_flag = false ; set to false to enable stippling mode in monochrome displaymodes
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sub screen_mode(ubyte mode) {
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; mode 0 = bitmap 320 x 240 x 1c monochrome
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; mode 1 = bitmap 320 x 240 x 256c
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; mode 128 = bitmap 640 x 480 x 1c monochrome
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; ...other modes?
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; copy the lower-case charset to the upper part of the vram, so we can use it later to plot text
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when mode {
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0 -> {
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; 320 x 240 x 1c
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1 -> {
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; lores monchrome
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cx16.VERA_DC_VIDEO = (cx16.VERA_DC_VIDEO & %11001111) | %00100000 ; enable only layer 1
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cx16.VERA_DC_HSCALE = 64
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cx16.VERA_DC_VSCALE = 64
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@ -38,8 +42,9 @@ gfx2 {
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height = 240
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bpp = 1
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}
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1 -> {
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; 320 x 240 x 256c
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; TODO modes 2, 3 not yet implemented
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4 -> {
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; lores 256c
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cx16.VERA_DC_VIDEO = (cx16.VERA_DC_VIDEO & %11001111) | %00100000 ; enable only layer 1
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cx16.VERA_DC_HSCALE = 64
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cx16.VERA_DC_VSCALE = 64
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@ -50,8 +55,8 @@ gfx2 {
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height = 240
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bpp = 8
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}
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128 -> {
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; 640 x 480 x 1c
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5 -> {
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; highres monochrome
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cx16.VERA_DC_VIDEO = (cx16.VERA_DC_VIDEO & %11001111) | %00100000 ; enable only layer 1
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cx16.VERA_DC_HSCALE = 128
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cx16.VERA_DC_VSCALE = 128
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@ -62,13 +67,16 @@ gfx2 {
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height = 480
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bpp = 1
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}
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255 -> {
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; TODO mode 6 highres 4c
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; modes 7 and 8 not supported due to lack of VRAM
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else -> {
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; back to default text mode and colors
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cx16.VERA_CTRL = %10000000 ; reset VERA and palette
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c64.CINT() ; back to text mode
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width = 0
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height = 0
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bpp = 0
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mode = 0
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}
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}
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@ -81,21 +89,24 @@ gfx2 {
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monochrome_stipple(false)
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position(0, 0)
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when active_mode {
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0 -> {
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; 320 x 240 x 1c
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1 -> {
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; lores monochrome
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repeat 240/2/8
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cs_innerloop640()
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}
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1 -> {
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; 320 x 240 x 256c
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; TODO mode 2, 3
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4 -> {
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; lores 256c
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repeat 240/2
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cs_innerloop640()
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}
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128 -> {
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; 640 x 480 x 1c
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5 -> {
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; highres monochrome
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repeat 480/8
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cs_innerloop640()
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}
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; TODO mode 6 highres 4c
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; modes 7 and 8 not supported due to lack of VRAM
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}
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position(0, 0)
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}
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@ -130,8 +141,8 @@ gfx2 {
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if length==0
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return
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when active_mode {
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1 -> {
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; 8bpp mode
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4 -> {
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; lores 256c
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position(x, y)
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%asm {{
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lda color
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@ -152,8 +163,8 @@ gfx2 {
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+ plx
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}}
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}
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0, 128 -> {
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; 1 bpp mode
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1, 5 -> {
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; monochrome modes, either resolution
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ubyte separate_pixels = (8-lsb(x)) & 7
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if separate_pixels as uword > length
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separate_pixels = lsb(length)
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@ -212,7 +223,8 @@ _done
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sub vertical_line(uword x, uword y, uword height, ubyte color) {
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position(x,y)
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if active_mode==1 {
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if active_mode==4 {
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; lores 256c
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; set vera auto-increment to 320 pixel increment (=next line)
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cx16.VERA_ADDR_H = (cx16.VERA_ADDR_H & %00000111) | (14<<4)
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%asm {{
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@ -230,7 +242,7 @@ _done
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; note for the 1 bpp modes we can't use vera's auto increment mode because we have to 'or' the pixel data in place.
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cx16.VERA_ADDR_H = (cx16.VERA_ADDR_H & %00000111) ; no auto advance
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cx16.r15 = gfx2.plot.bits[x as ubyte & 7] ; bitmask
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if active_mode>=128
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if active_mode>=5
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cx16.r14 = 640/8
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else
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cx16.r14 = 320/8
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@ -472,7 +484,8 @@ _done
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ubyte value
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when active_mode {
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0 -> {
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1 -> {
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; lores monochrome
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%asm {{
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lda x
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eor y
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@ -490,7 +503,8 @@ _done
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}
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}
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}
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128 -> {
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5 -> {
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; highres monochrome
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%asm {{
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lda x
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eor y
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@ -508,7 +522,8 @@ _done
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}
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}
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}
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1 -> {
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4 -> {
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; lores 256c
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void addr_mul_320_add_24(y, x) ; 24 bits result is in r0 and r1L
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value = lsb(cx16.r1)
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cx16.vpoke(value, cx16.r0, color)
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@ -521,15 +536,18 @@ _done
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sub position(uword @zp x, uword y) {
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when active_mode {
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0 -> {
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1 -> {
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; lores monochrome
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cx16.r0 = y*(320/8) + x/8
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cx16.vaddr(0, cx16.r0, 0, 1)
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}
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128 -> {
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5 -> {
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; highres monochrome
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cx16.r0 = y*(640/8) + x/8
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cx16.vaddr(0, cx16.r0, 0, 1)
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}
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1 -> {
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4 -> {
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; lores 256c
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void addr_mul_320_add_24(y, x) ; 24 bits result is in r0 and r1L
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ubyte bank = lsb(cx16.r1)
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cx16.vaddr(bank, cx16.r0, 0, 1)
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@ -614,13 +632,13 @@ _done
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sub text(uword @zp x, uword y, ubyte color, uword sctextptr) {
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; -- Write some text at the given pixel position. The text string must be in screencode encoding (not petscii!).
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; You must also have called text_charset() first to select and prepare the character set to use.
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; NOTE: in monochrome (1bpp) screen modes, x position is currently constrained to mulitples of 8 !
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; NOTE: in monochrome (1bpp) screen modes, x position is currently constrained to mulitples of 8 ! TODO allow per-pixel horizontal positioning
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uword chardataptr
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when active_mode {
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0, 128 -> {
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; 1-bitplane modes
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1, 5 -> {
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; monochrome mode, either resolution
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cx16.r2 = 40
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if active_mode>=128
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if active_mode>=5
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cx16.r2 = 80
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while @(sctextptr) {
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chardataptr = charset_addr + (@(sctextptr) as uword)*8
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@ -660,8 +678,8 @@ _done
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sctextptr++
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}
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}
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1 -> {
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; 320 x 240 x 256c
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4 -> {
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; lores 256c
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while @(sctextptr) {
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chardataptr = charset_addr + (@(sctextptr) as uword)*8
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cx16.vaddr(charset_bank, chardataptr, 1, 1)
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@ -11,7 +11,7 @@ main {
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sub start() {
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palette.set_monochrome($0aaa, $0000)
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gfx2.screen_mode(128) ; select 640*480 mode
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gfx2.screen_mode(5) ; select 640*480 mode
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cx16.VERA_DC_VSCALE = 64 ; have the vertical resolution so it is 640*240 - more or less Amiga's default non interlaced mode
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cx16.mouse_config(1, 1) ; enable mouse TODO make it an Amiga mouse pointer if possible
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gfx2.text_charset(3)
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@ -11,12 +11,12 @@ main {
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test_monochrome()
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gfx2.screen_mode(255)
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gfx2.screen_mode(0)
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txt.print("done!\n")
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}
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sub test_monochrome() {
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gfx2.screen_mode(128)
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gfx2.screen_mode(5)
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uword yy
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uword xx
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word ww
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@ -7,8 +7,19 @@
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main {
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sub start() {
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gfx2.screen_mode(128)
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gfx2.screen_mode(5)
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; demo1()
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; sys.wait(3*60)
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demo2()
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gfx2.screen_mode(0)
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txt.print("done!\n")
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test_stack.test()
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}
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sub demo1() {
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uword pixels = memory("pixels", 320)
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uword yy = 10
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uword xx
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@ -124,21 +135,12 @@ main {
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}
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xx+=4
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}
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sys.wait(3*60)
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demo2()
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gfx2.screen_mode(255)
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txt.print("done!\n")
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test_stack.test()
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}
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sub demo2 () {
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gfx2.text_charset(3)
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ubyte[] modes = [1, 0, 128]
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ubyte[] modes = [4, 1, 5]
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ubyte mode
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for mode in modes {
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gfx2.screen_mode(mode)
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