From: uz Date: Mon, 7 Jan 2013 19:37:18 +0000 (+0000) Subject: Patch by Greg King: Added a TGI text translator and a palette graphics driver X-Git-Tag: V2.14~116 X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=a302df3cc16fb1f4eebd829ac27c943cf7a0849d;p=cc65 Patch by Greg King: Added a TGI text translator and a palette graphics driver to Atmos library. git-svn-id: svn://svn.cc65.org/cc65/trunk@5958 b7a2c559-68d2-44c3-8de9-860c34a00d81 --- diff --git a/libsrc/atmos/Makefile b/libsrc/atmos/Makefile index c69b04d33..532a87866 100644 --- a/libsrc/atmos/Makefile +++ b/libsrc/atmos/Makefile @@ -94,6 +94,7 @@ OBJS = _scrsize.o \ tgi_colors.o \ tgi_stat_stddrv.o \ tgi_stddrv.o \ + toascii.o \ wherex.o \ wherey.o \ write.o \ @@ -115,7 +116,7 @@ MOUS = SERS = atmos-acia.ser -TGIS = atmos-240-200-2.tgi +TGIS = atmos-240-200-2.tgi atmos-228-200-3.tgi #-------------------------------------------------------------------------- # Targets diff --git a/libsrc/atmos/atmos-228-200-3.s b/libsrc/atmos/atmos-228-200-3.s new file mode 100644 index 000000000..03a9ce7df --- /dev/null +++ b/libsrc/atmos/atmos-228-200-3.s @@ -0,0 +1,426 @@ +; +; Graphics driver for the 228x200x3 palette mode on the Atmos +; +; Stefan Haubenthal +; 2012-08-11, Greg King +; + + .include "zeropage.inc" + + .include "tgi-kernel.inc" + .include "tgi-error.inc" + .include "atmos.inc" + + .macpack generic + +XSIZE = 6 ; System font width +YSIZE = 8 ; System font height + +; ------------------------------------------------------------------------ +; Header. Includes jump table and constants. + +.segment "JUMPTABLE" + +; The first part of the header is a structure that has a signature, +; and defines the capabilities of the driver. + + .byte "tgi" + .byte TGI_API_VERSION ; TGI API version number + .word 228 ; x resolution + .word 200 ; y resolution + .byte 3 ; Number of drawing colors + .byte 1 ; Number of screens available + .byte XSIZE ; System font x size + .byte YSIZE ; System font y size + .word $011C ; Aspect ratio (based on 4/3 display) + .byte 0 ; TGI driver flags + +; Next comes the jump table. Currently, all entries must be valid; +; and, may point to an RTS, for test versions (function not implemented). + + .addr INSTALL + .addr UNINSTALL + .addr INIT + .addr DONE + .addr GETERROR + .addr CONTROL + .addr CLEAR + .addr SETVIEWPAGE + .addr SETDRAWPAGE + .addr SETCOLOR + .addr SETPALETTE + .addr GETPALETTE + .addr GETDEFPALETTE + .addr SETPIXEL + .addr GETPIXEL + .addr LINE + .addr BAR + .addr TEXTSTYLE + .addr OUTTEXT + .addr 0 ; IRQ entry is unused + +; ------------------------------------------------------------------------ +; Data. + +; Variables mapped to the zero-page segment variables. These are +; used for passing parameters to the driver. + +X1 := ptr1 +Y1 := ptr2 +X2 := ptr3 +Y2 := ptr4 + +; Absolute variables used in the code + +.bss + +ERROR: .res 1 ; Error code +MODE: .res 1 ; Graphics mode +PALETTE: .res 2 + +; Constants and table +; BASIC 1.1 addresses +PATTERN := $213 +PARAM1 := $2E1 ; & $2E2 +PARAM2 := $2E3 ; & $2E4 +PARAM3 := $2E5 ; & $2E6 +TEXT := $EC21 +HIRES := $EC33 +CURSET := $F0C8 +CURMOV := $F0FD +DRAW := $F110 +CHAR := $F12D +POINT := $F1C8 +PAPER := $F204 +INK := $F210 + +.rodata + +; Default colors: black background, white foreground +; (The third "color" actually flips a pixel +; between the foreground and background colors.) +; +DEFPALETTE: .byte 0, 1 + +.code + +; ------------------------------------------------------------------------ +; INIT: Changes an already installed device from text mode to graphics mode. +; Note that INIT/DONE may be called multiple times while the driver +; is loaded, while INSTALL is called only once. So, any code that is needed +; to initialize variables and so on must go here. Setting palette and +; clearing the screen are not needed because they are called by the graphics +; kernel later. +; The graphics kernel never will call INIT when a graphics mode is already +; active, so there is no need to protect against that. +; +; Must set an error code: YES +; + +INIT: + +; Switch into graphics mode. + + jsr HIRES + +; Done, reset the error code. + +; ------------------------------------------------------------------------ +; GETERROR: Return the error code in A, and clear it. + +GETERROR: + ldx #TGI_ERR_OK + lda ERROR + stx ERROR + +; ------------------------------------------------------------------------ +; INSTALL routine. Is called after the driver is loaded into memory. May +; initialize anything that has to be done just once. Is probably empty +; most of the time. +; +; Must set an error code: NO +; + +INSTALL: + +; ------------------------------------------------------------------------ +; UNINSTALL routine. Is called before the driver is removed from memory. May +; clean up anything done by INSTALL, but probably is empty most of the time. +; +; Must set an error code: NO +; + +UNINSTALL: + rts + +; ------------------------------------------------------------------------ +; DONE: Will be called to switch the graphics device back into text mode. +; The graphics kernel never will call DONE when no graphics mode is active, +; so there is no need to protect against that. +; +; Must set an error code: NO +; + +DONE := TEXT + +; ------------------------------------------------------------------------ +; CONTROL: Platform-/driver-specific entry point. +; +; Must set an error code: YES +; + +CONTROL: + sta PATTERN + lda #TGI_ERR_OK + sta ERROR + rts + +; ------------------------------------------------------------------------ +; CLEAR: Clears the screen. +; +; Must set an error code: NO +; + +CLEAR := HIRES + +; ------------------------------------------------------------------------ +; SETVIEWPAGE: Set the visible page. Called with the new page in A (0..n). +; The page number already is checked to be valid, by the graphics kernel. +; +; Must set an error code: NO (will be called only if page OK) +; + +SETVIEWPAGE: + +; ------------------------------------------------------------------------ +; SETDRAWPAGE: Set the drawable page. Called with the new page in A (0..n). +; The page number already is checked to be valid, by the graphics kernel. +; +; Must set an error code: NO (will be called only if page OK) +; + +SETDRAWPAGE: + rts + +; ------------------------------------------------------------------------ +; SETCOLOR: Set the drawing color (in A). The new color already is checked +; to be in a valid range (0..maxcolor-1). +; +; Must set an error code: NO (will be called only if color OK) +; + +SETCOLOR: + sta MODE + rts + +; ------------------------------------------------------------------------ +; SETPALETTE: Set the palette (not available with all drivers/hardware). +; A pointer to the palette is passed in ptr1. Must set an error if palettes +; are not supported. +; +; Must set an error code: YES +; + +SETPALETTE: + ldy #0 + jsr flipcolor + sty PARAM1+1 + jsr PAPER + ldy #1 + jsr flipcolor + dey ; TGI_ERR_OK + sty ERROR + sty PARAM1+1 + jmp INK + +flipcolor: + lda (ptr1),y + sta PALETTE,y + cmp #1 + beq @flip + cmp #7 + bne @keep +@flip: eor #1 ^ 7 +@keep: sta PARAM1 + rts + +; ------------------------------------------------------------------------ +; GETPALETTE: Return the current palette in A/X. Even drivers that cannot +; set the palette should return the default palette here, so there's no +; way for this function to fail. +; +; Must set an error code: NO +; + +GETPALETTE: + lda #PALETTE + rts + +; ------------------------------------------------------------------------ +; GETDEFPALETTE: Return the default palette for the driver in A/X. All +; drivers should return something reasonable here, even drivers that don't +; support palettes; otherwise, the caller has no way to determine the colors +; of the (not changeable) palette. +; +; Must set an error code: NO (all drivers must have a default palette) +; + +GETDEFPALETTE: + lda #DEFPALETTE + rts + +; ------------------------------------------------------------------------ +; SETPIXEL: Draw one pixel at X1/Y1 = ptr1/ptr2 with the current drawing +; color. The co-ordinates passed to this function are never outside the +; visible screen area, so there is no need for clipping inside this function. +; +; Must set an error code: NO +; + +SETPIXEL: + lda Y1 + sta PARAM2 + lda MODE +mymode: sta PARAM3 + lda X1 + add #2 * XSIZE ; Skip screen attribute columns + sta PARAM1 + lda #0 + sta PARAM1+1 + sta PARAM2+1 + sta PARAM3+1 + jmp CURSET + +; ------------------------------------------------------------------------ +; GETPIXEL: Read the color value of a pixel, and return it in A/X. The +; co-ordinates passed to this function are never outside the visible screen +; area, so there is no need for clipping inside this function. + +GETPIXEL: + lda X1 + sta PARAM1 + lda Y1 + sta PARAM2 + lda #0 + sta PARAM1+1 + sta PARAM2+1 + jsr POINT + lda PARAM1 + and #%00000001 + ldx #0 + rts + +; ------------------------------------------------------------------------ +; LINE: Draw a line from X1/Y1 to X2/Y2, where X1/Y1 = ptr1/ptr2 and +; X2/Y2 = ptr3/ptr4, using the current drawing color. +; +; Must set an error code: NO +; + +LINE: + jsr SETPIXEL + lda X2 + sub X1 + sta PARAM1 + lda X2+1 + sbc X1+1 + sta PARAM1+1 + lda Y2 + sub Y1 + sta PARAM2 + lda Y2+1 + sbc Y1+1 + sta PARAM2+1 + lda MODE + sta PARAM3 + ldx #>0 + stx PARAM3+1 + jmp DRAW + +; ------------------------------------------------------------------------ +; BAR: Draw a filled rectangle with the corners X1/Y1, X2/Y2, where +; X1/Y1 = ptr1/ptr2 and X2/Y2 = ptr3/ptr4, using the current drawing color. +; Contrary to most other functions, the graphics kernel will sort and clip +; the co-ordinates before calling the driver; so, on entry, the following +; conditions are valid: +; X1 <= X2 +; Y1 <= Y2 +; (X1 >= 0) && (X1 < XRES) +; (X2 >= 0) && (X2 < XRES) +; (Y1 >= 0) && (Y1 < YRES) +; (Y2 >= 0) && (Y2 < YRES) +; +; Must set an error code: NO +; + +BAR: + inc Y2 +@L1: lda Y2 + pha + lda Y1 + sta Y2 + jsr LINE + pla + sta Y2 + inc Y1 + cmp Y1 + bne @L1 + rts + +; ------------------------------------------------------------------------ +; TEXTSTYLE: Set the style used when calling OUTTEXT. Text scaling in the x +; and y directions is passend in X/Y, the text direction is passed in A. +; +; Must set an error code: NO +; + +TEXTSTYLE: + rts + + +; ------------------------------------------------------------------------ +; OUTTEXT: Output text at X/Y = ptr1/ptr2 using the current color and the +; current text style. The text to output is given as a zero-terminated +; string with its address in ptr3. +; +; Must set an error code: NO +; + +OUTTEXT: + lda Y1 + sub #(YSIZE - 1) + sta PARAM2 + lda #3 ; (Move graphics cursor; don't draw) + jsr mymode + + ldy #0 +@next: lda (ptr3),y + beq @end + sta PARAM1 + lda #0 + sta PARAM2 + sta PARAM1+1 + sta PARAM2+1 + sta PARAM3+1 + lda MODE + sta PARAM3 + tya + pha + jsr CHAR + lda #XSIZE + sta PARAM1 + lda #0 + sta PARAM2 + sta PARAM1+1 + sta PARAM2+1 + sta PARAM3+1 + lda #3 + sta PARAM3 + jsr CURMOV + pla + tay + iny + bne @next +@end: rts diff --git a/libsrc/atmos/toascii.s b/libsrc/atmos/toascii.s new file mode 100644 index 000000000..606fb0b6b --- /dev/null +++ b/libsrc/atmos/toascii.s @@ -0,0 +1,14 @@ +; +; char __fastcall__ toascii (char c); +; /* Convert a target-specific character to ASCII. */ +; + +.export _toascii + +.proc _toascii + +; .X must be zero, on return. + ldx #>0 + rts + +.endproc