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Irmen de Jong
parent
b5dc5fc615
commit
74e5644f55
@ -20,7 +20,7 @@ internal class FunctionCallAsmGen(private val program: Program, private val asmg
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translateFunctionCall(stmt, preserveStatusRegisterAfterCall)
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// functioncalls no longer return results on the stack, so simply ignore the results in the registers
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if(preserveStatusRegisterAfterCall)
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asmgen.out(" plp\t; restore status flags from call")
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asmgen.out(" plp") // restore status flags from call
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}
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@ -69,7 +69,7 @@ internal class FunctionCallAsmGen(private val program: Program, private val asmg
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asmgen.out(" jsr $subName")
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if(preserveStatusRegisterAfterCall) {
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asmgen.out(" php\t; save status flags from call")
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asmgen.out(" php") // save status flags from call
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// note: the containing statement (such as the FunctionCallStatement or the Assignment or the Expression)
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// must take care of popping this value again at the end!
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}
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@ -183,7 +183,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
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}
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}
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if (preserveStatusRegisterAfterCall)
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asmgen.out(" plp\t; restore status flags from call")
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asmgen.out(" plp") // restore status flags from call
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}
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is BuiltinFunctionStatementPlaceholder -> {
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val signature = BuiltinFunctions.getValue(sub.name)
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@ -2,6 +2,8 @@
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TODO
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====
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- add minv(a,b) and maxv(a,b) functions to determine the max or min of 2 values
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- add progend() builtin function that returns the last address of the program in memory + 1 (to be able to stick dynamic data after the program easily)
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- see if we can group some errors together for instance the (now single) errors about unidentified symbols
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- Cx16 target: support full-screen 640x480 and 320x240 graphics? That requires our own custom graphics routines though to draw lines.
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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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BIN
examples/cx16/imgviewer/TRSI256.CI
Normal file
BIN
examples/cx16/imgviewer/TRSI256.CI
Normal file
Binary file not shown.
@ -2,8 +2,7 @@
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%import graphics
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%import textio
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%import diskio
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%import c64colors
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%zeropage basicsafe
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%option no_sysinit
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; CommanderX16 Image file format.
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; Numbers are encoded in little endian format (lsb first).
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@ -19,12 +18,12 @@
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; this also determines the number of palette entries following later.
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; 8 Settings bits.
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; bit 0 and 1 = compression. 00 = uncompressed
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; 01 = PCX-RLE [TODO not yet implemented]
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; 01 = RLE [TODO not yet implemented]
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; 10 = LZSA [TODO not yet implemented]
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; 11 = Exomizer [TODO not yet implemented]
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; bit 2 = palette format. 0 = 4 bits/channel (2 bytes per color, $0R $GB) [TODO not yet implemented]
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; 1 = 8 bits/channel (3 bytes per color, $RR $GG $BB)
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; 4 bits per channel is the Cx16's native palette format.
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; 4 bits per channel is what the Vera in the Cx16 supports.
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; bit 3 = bitmap format. 0 = raw bitmap pixels
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; 1 = tile-based image [TODO not yet implemented]
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; bit 4 = hscale (horizontal display resulution) 0 = 320 pixels, 1 = 640 pixels
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@ -43,24 +42,31 @@
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; of bytes making up the image's scan lines. #bytes per scan line = width * bits-per-pixel / 8
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; If it is 'tiles', .... [TODO]
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; If a compression scheme is used, the bitmap data here has to be decompressed first.
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; TODO: with compressed files, store the data in compressed chunks of max 8kb uncompressed?
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; (it is a problem to load let alone decompress a full bitmap at once because there will likely not be enough ram to do that)
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; (doing it in chunks of 8 kb allows for sticking each chunk in one of the banked 8kb ram blocks, or even copy it directly to the screen)
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main {
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ubyte[256] buffer
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ubyte[256] buffer2
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ubyte[256] buffer3
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ubyte[256] buffer2 ; add two more buffers to make enoughs space
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ubyte[256] buffer3 ; to store a 256 color palette
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str filename = "trsi256.ci"
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const uword bitmap_load_address = $2000 ; TODO use progend() once it is available
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const uword max_bitmap_size = $9eff - bitmap_load_address
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sub start() {
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buffer[0] = 0
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buffer2[0] = 0
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buffer3[0] = 0
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ubyte read_success = false
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if(io.f_open(8, filename)) {
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uword size = io.f_read(buffer, 12) ; read the header
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txt.print(filename)
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txt.chrout('\n')
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if(diskio.f_open(8, filename)) {
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uword size = diskio.f_read(buffer, 12) ; read the header
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if size==12 {
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if buffer[0]=='c' and buffer[1]=='i' and buffer[2] == 9 {
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if buffer[11] {
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@ -75,111 +81,136 @@ main {
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ubyte compression = flags & %00000011
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ubyte palette_format = (flags & %00000100) >> 2
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ubyte bitmap_format = (flags & %00001000) >> 3
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ubyte hscale = (flags & %00010000) >> 4
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ubyte vscale = (flags & %00100000) >> 5
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; ubyte hscale = (flags & %00010000) >> 4
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; ubyte vscale = (flags & %00100000) >> 5
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uword bitmap_size = mkword(buffer[10], buffer[9])
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uword palette_size
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uword palette_size = num_colors*2
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if palette_format
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palette_size = 3*num_colors
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else
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palette_size = 2*num_colors
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txt.print(filename)
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txt.print("\ndimensions: ")
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palette_size += num_colors ; 3
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txt.print_uw(width)
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txt.chrout('*')
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txt.print_uw(height)
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txt.print("\nbits-per-pixel: ")
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txt.print_ub(bpp)
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txt.print(" #colors: ")
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txt.print(" * ")
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txt.print_uw(num_colors)
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txt.print("\ncompression: ")
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txt.print_ub(compression)
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txt.print("\npalette format: ")
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txt.print_ub(palette_format)
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txt.print("\nbitmap format: ")
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txt.print_ub(bitmap_format)
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txt.print("\nscaling: ")
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txt.print_ub(hscale)
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txt.chrout(',')
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txt.print_ub(vscale)
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txt.chrout('\n')
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if compression!=0 {
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txt.print("compression not yet supported\n") ; TODO implement this
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txt.print(" colors\n")
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if width > graphics.WIDTH {
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txt.print("image is too wide for the display!\n")
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} else if compression!=0 {
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txt.print("compressed image not yet supported!\n") ; TODO implement the various decompressions
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} else if bitmap_format==1 {
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txt.print("tiled bitmap not yet supported\n") ; TODO implement this
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txt.print("tiled bitmap not yet supported!\n") ; TODO implement tiled image
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} else if bitmap_size > max_bitmap_size {
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; TODO implement large file support by using memory banks (nasty if compression is used though)
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; TODO in case of uncompressed data: do not read the full bitmap in memory but read a scanline at a time and display them as we go
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txt.print("not enough ram to load bitmap!\nrequired: ")
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txt.print_uw(bitmap_size)
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txt.print(" available: ")
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txt.print_uw(max_bitmap_size)
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txt.chrout('\n')
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} else {
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txt.print("reading palette and bitmap...\n")
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size = io.f_read(buffer, palette_size)
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txt.print("loading...")
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size = diskio.f_read(buffer, palette_size)
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if size==palette_size {
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size = io.f_read($3000, bitmap_size)
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read_success = size==bitmap_size
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size = diskio.f_read(bitmap_load_address, bitmap_size)
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if size==bitmap_size {
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; all data has been loaded, display the image
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diskio.f_close()
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read_success = true
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txt.print("ok\n")
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; restrict the height to what can be displayed using the graphics functions...
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if height > graphics.HEIGHT
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height = graphics.HEIGHT ; TODO use maxv() once it is available
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graphics.enable_bitmap_mode()
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set_palette(num_colors, palette_format, buffer)
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when bpp {
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8 -> display_uncompressed_256c(width, height, bitmap_load_address)
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4 -> display_uncompressed_16c(width, height, bitmap_load_address)
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2 -> display_uncompressed_4c(width, height, bitmap_load_address)
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1 -> display_uncompressed_2c(width, height, bitmap_load_address)
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}
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}
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}
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}
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}
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}
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} else {
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txt.print("io error or invalid image file\n")
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}
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io.f_close()
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diskio.f_close()
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if read_success {
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txt.print("done!\n")
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} else {
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txt.print("error loading image file.\n")
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if not read_success {
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txt.print("error!\n")
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}
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}
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txt.print(diskio.status(8))
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}
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}
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io {
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ubyte iteration_in_progress = false
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sub f_open(ubyte drivenumber, uword filenameptr) -> ubyte {
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f_close()
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c64.SETNAM(strlen(filenameptr), filenameptr)
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c64.SETLFS(11, drivenumber, 0)
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void c64.OPEN() ; open 11,8,0,"filename"
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if_cc {
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iteration_in_progress = true
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void c64.CHKIN(11) ; use #2 as input channel
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if_cc
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return true
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}
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f_close()
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return false
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}
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sub f_read(uword bufferpointer, uword buffersize) -> uword {
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if not iteration_in_progress
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return 0
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uword actual = 0
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repeat buffersize {
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ubyte data = c64.CHRIN()
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@(bufferpointer) = data
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bufferpointer++
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actual++
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ubyte status = c64.READST()
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if status==64
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f_close() ; end of file, close it
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if status
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return actual
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}
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return actual
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}
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sub f_close() {
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; -- end an iterative file loading session (close channels).
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if iteration_in_progress {
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c64.CLRCHN()
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c64.CLOSE(11)
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iteration_in_progress = false
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}
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repeat {
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; endless loop
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}
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}
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sub set_palette(uword num_colors, ubyte format, uword palletteptr) {
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uword vera_palette_ptr = $fa00
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ubyte red
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ubyte greenblue
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if format {
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; 3 bytes per color entry, adjust color depth from 8 to 4 bits per channel.
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repeat num_colors {
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red = @(palletteptr) >> 4
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palletteptr++
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greenblue = @(palletteptr) & %11110000
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palletteptr++
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greenblue |= @(palletteptr) >> 4 ; add Blue
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palletteptr++
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cx16.vpoke(1, vera_palette_ptr, greenblue)
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vera_palette_ptr++
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cx16.vpoke(1, vera_palette_ptr, red)
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vera_palette_ptr++
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}
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} else {
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; 2 bytes per color entry, the Vera uses this, but the R/GB bytes order is swapped
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repeat num_colors {
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cx16.vpoke(1, vera_palette_ptr+1, @(palletteptr))
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palletteptr++
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cx16.vpoke(1, vera_palette_ptr, @(palletteptr))
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palletteptr++
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vera_palette_ptr+=2
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}
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}
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}
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sub display_uncompressed_256c(uword width, uword height, uword bitmapptr) {
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uword y
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for y in 0 to height-1 {
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cx16.r0 = 0
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cx16.r1 = y
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cx16.FB_cursor_position()
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; FB_set_pixels crashes with a size > 255 hence the loop for strips of 128
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; TODO remove this workaround once the bug is fixed, see https://github.com/commanderx16/x16-rom/issues/179
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cx16.r1 = 128
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ubyte rest = lsb(width) & 127
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repeat width >> 7 {
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cx16.r0 = bitmapptr
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cx16.FB_set_pixels()
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bitmapptr += 128
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}
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if rest {
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cx16.r0 = bitmapptr
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cx16.FB_set_pixels()
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bitmapptr += rest
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}
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}
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}
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sub display_uncompressed_16c(uword width, uword height, uword bitmapptr) {
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; TODO 16 color
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}
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sub display_uncompressed_4c(uword width, uword height, uword bitmapptr) {
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; TODO 4 color
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}
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sub display_uncompressed_2c(uword width, uword height, uword bitmapptr) {
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; TODO 2 color
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}
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}
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