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added Cx16 highresbitmap example. added stippled drawing to gfx2 monochrome mode
This commit is contained in:
Irmen de Jong
parent
6cb0e6a936
commit
9e2c52e1ec
@ -6,7 +6,6 @@
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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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; TODO this is in development. Add line drawing, circles and discs (like the graphics module has)
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gfx2 {
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@ -15,6 +14,7 @@ gfx2 {
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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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@ -77,6 +77,7 @@ gfx2 {
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}
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sub clear_screen() {
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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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@ -98,6 +99,10 @@ gfx2 {
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position(0, 0)
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}
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sub monochrome_stipple(ubyte enable) {
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monochrome_dont_stipple_flag = ~enable
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}
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sub rect(uword x, uword y, uword width, uword height, ubyte color) {
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if width==0 or height==0
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return
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@ -289,8 +294,8 @@ gfx2 {
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word @zp decisionOver2 = (1 as word)-radius
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while radius>=yy {
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horizontal_line(xcenter-radius, ycenter+yy, radius*2+1, color)
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horizontal_line(xcenter-radius, ycenter-yy, radius*2+1, color)
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horizontal_line(xcenter-radius, ycenter+yy, radius*$0002+1, color)
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horizontal_line(xcenter-radius, ycenter-yy, radius*$0002+1, color)
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horizontal_line(xcenter-yy, ycenter+radius, yy*2+1, color)
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horizontal_line(xcenter-yy, ycenter-radius, yy*2+1, color)
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yy++
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@ -307,26 +312,53 @@ gfx2 {
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ubyte[8] bits = [128, 64, 32, 16, 8, 4, 2, 1]
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uword addr
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ubyte value
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when active_mode {
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0 -> {
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addr = x/8 + y*(320/8)
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value = bits[lsb(x)&7]
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cx16.vpoke_or(0, addr, value)
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%asm {{
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lda x
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eor y
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ora monochrome_dont_stipple_flag
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and #1
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}}
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if_nz {
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addr = x/8 + y*(320/8)
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value = bits[lsb(x)&7]
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if color
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cx16.vpoke_or(0, addr, value)
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else {
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value = ~value
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cx16.vpoke_and(0, addr, value)
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}
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}
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}
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128 -> {
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addr = x/8 + y*(640/8)
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value = bits[lsb(x)&7]
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cx16.vpoke_or(0, addr, value)
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%asm {{
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lda x
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eor y
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ora monochrome_dont_stipple_flag
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and #1
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}}
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if_nz {
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addr = x/8 + y*(640/8)
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value = bits[lsb(x)&7]
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if color
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cx16.vpoke_or(0, addr, value)
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else {
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value = ~value
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cx16.vpoke_and(0, addr, value)
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}
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}
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}
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1 -> {
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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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; activate vera auto-increment mode so next_pixel() can be used after this
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cx16.VERA_ADDR_H = (cx16.VERA_ADDR_H & %00000111) | %00010000
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color = cx16.VERA_DATA0
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}
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}
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; activate vera auto-increment mode so next_pixel() can be used after this
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cx16.VERA_ADDR_H = (cx16.VERA_ADDR_H & %00000111) | %00010000
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color = cx16.VERA_DATA0
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}
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sub position(uword @zp x, uword y) {
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@ -424,10 +456,18 @@ gfx2 {
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lda cx16.VERA_ADDR_H
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and #%111 ; don't auto-increment, we have to do that manually because of the ora
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sta cx16.VERA_ADDR_H
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lda color
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sta P8ZP_SCRATCH_B1
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ldy #8
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- lda cx16.VERA_DATA0
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- lda P8ZP_SCRATCH_B1
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bne + ; white color, plot normally
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lda cx16.VERA_DATA1
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eor #255 ; black color, keep only the other pixels
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and cx16.VERA_DATA0
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bra ++
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+ lda cx16.VERA_DATA0
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ora cx16.VERA_DATA1
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sta cx16.VERA_DATA0
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+ sta cx16.VERA_DATA0
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lda cx16.VERA_ADDR_L
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clc
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adc cx16.r2
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@ -91,10 +91,11 @@ gfx2 (cx16 only)
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Full-screen multicolor bitmap graphics routines, available on the Cx16 machine only.
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- multiple full-screen resolutions: 640 * 480 monochrome, and 320 * 240 monochrome and 256 colors
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- clearing screen, switching screen mode
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- drawing pixels
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- clearing screen, switching screen mode, also back to text mode is possible.
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- drawing individual pixels
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- drawing lines, rectangles, filled rectangles, circles, discs
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- drawing text inside the bitmap
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- lines, rectangles, circles, discs.
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- in monochrome mode, it's possible to use a stippled drawing pattern to simulate a shade of gray.
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palette (cx16 only)
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@ -2,7 +2,8 @@
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TODO
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====
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- implement gfx2's rect, fillrect, horizontal_line and vertical_line in graphics modules as well.
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- nice error msg for float as for loop var
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- implement gfx2's rect, fillrect, horizontal_line and vertical_line in graphics modules as well. (and optimize bresenham line to use vert/horiz line if possible)
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- detect variables that are written but never read - mark those as unused too and remove them, such as uword unused = memory("unused222", 20) - also remove the memory slab allocation
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- hoist all variable declarations up to the subroutine scope *before* even the constant folding takes place (to avoid undefined symbol errors when referring to a variable from another nested scope in the subroutine)
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- make it possible to use cpu opcodes such as 'nop' as variable names by prefixing all asm vars with something such as '_'
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87
examples/cx16/highresbitmap.p8
Normal file
87
examples/cx16/highresbitmap.p8
Normal file
@ -0,0 +1,87 @@
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%target cx16
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%import gfx2
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%import floats
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%import textio
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%zeropage basicsafe
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main {
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sub start () {
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gfx2.text_charset(3)
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test_monochrome()
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gfx2.screen_mode(255)
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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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uword yy
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uword xx
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word ww
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yy = 20
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xx = 20
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gfx2.monochrome_stipple(false)
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gfx2.rect(xx, yy, 250, 80, 1)
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gfx2.monochrome_stipple(true)
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gfx2.fillrect(xx+2, yy+2, 250-4, 80-4, 1)
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gfx2.monochrome_stipple(false)
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gfx2.fillrect(xx+20, yy+20, 200, 30, 1)
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gfx2.rect(xx+21, yy+21, 200-2, 30-2, 0)
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gfx2.text(xx+30, yy+32, 0, @"High Res Bitmap Example")
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; gfx2.monochrome_stipple(true)
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gfx2.horizontal_line(10, 240, 620, 1)
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gfx2.vertical_line(320, 10, 460, 1)
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gfx2.text(320, 242, 1, @"0,0")
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gfx2.text(322, 10, 1, @"Y-axis")
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gfx2.text(590, 242, 1, @"X-axis")
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for ww in -10 to 10 {
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xx = (ww*30) + 320 as uword
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gfx2.vertical_line(xx, 239, 3, 1)
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}
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for ww in -7 to 7 {
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yy = (ww*30) + 240 as uword
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gfx2.horizontal_line(319, yy, 3, 1)
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}
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gfx2.monochrome_stipple(false)
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float y_f
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for ww in -600 to 600 {
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y_f = sin(ww as float / 60.0)*150
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gfx2.plot(ww/2 + 320 as uword, (y_f + 240) as uword, 1)
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}
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gfx2.text(480, 100, 1, @"sin(x)")
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for ww in -300 to 300 {
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y_f = cos(ww as float/30.0)*60 - (ww as float)/1.7
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gfx2.plot(ww + 320 as uword, (y_f + 240) as uword, 1)
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}
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gfx2.text(80, 420, 1, @"cos(x)+x")
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cx16.wait(3*60)
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gfx2.circle(320, 240, 220, 1)
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gfx2.circle(320, 240, 210, 1)
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gfx2.circle(320, 240, 200, 1)
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gfx2.circle(320, 240, 190, 1)
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gfx2.monochrome_stipple(true)
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gfx2.disc(320, 240, 140, 1)
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gfx2.monochrome_stipple(false)
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gfx2.disc(320, 240, 90, 1)
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gfx2.disc(320, 240, 40, 0)
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cx16.wait(2*60)
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repeat 255 {
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xx=rndw() % 640 ; TODO doesn't work correctly, truncates
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yy=rndw() % 480 ; TODO doesn't work correctly, truncates
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gfx2.line(xx, yy, rndw() % 640, rndw() % 480, 1)
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}
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cx16.wait(1*60)
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}
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}
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@ -7,46 +7,17 @@ main {
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sub start () {
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uword length
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uword total = 0
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length=200
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count()
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txt.print_uw(total)
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txt.chrout('\n')
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length=255
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count()
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txt.print_uw(total)
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txt.chrout('\n')
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length=256
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count()
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txt.print_uw(total)
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txt.chrout('\n')
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length=257
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count()
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txt.print_uw(total)
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txt.chrout('\n')
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length=9999
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count()
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txt.print_uw(total)
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txt.chrout('\n')
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; TODO uword var = rndw() % 640 doesn't work??? works if its in an expression.
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test_stack.test()
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sub count() {
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total = 0
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if length>256 {
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repeat length-1
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total++
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} else {
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uword total2
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repeat lsb(length-1)
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total++
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; repeat (length-1) as ubyte ; TODO lsb(length-1) doesn't work!?!?!?
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; total++
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}
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x_f = -300.0
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for ww in -300 to 300 {
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;fl = ww as float / 10.0 ; TODO doesn't work???
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y_f = cos(x_f/30)*60 - x_f/1.7
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gfx2.plot(ww + 320 as uword, (y_f + 240) as uword, 1)
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x_f += 1.0
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}
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}
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