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Routines |
Prev: 29441 | Up: Map |
Continues from the routine at 29706. Returns with the carry flag set if the speech bubble is off-screen.
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29442 | LD E,A | E=ASCII code of the character from the message being spoken | |||||||
29443 | LD A,(32612) | Copy the speech bubble lip x-coordinate from 32612 to A | |||||||
29446 | AND 120 | A=x-coordinate of the right edge of the text window within the speech bubble | |||||||
29448 | ADD A,6 | ||||||||
29450 | LD HL,32512 | 32512 holds the leftmost column of the skool on screen (0-64) | |||||||
29453 | SUB (HL) | Return with the carry flag set if the speech bubble is off-screen to the left | |||||||
29454 | RET C | ||||||||
29455 | CP 32 | Return with the carry flag set if the speech bubble is off-screen to the right | |||||||
29457 | CCF | ||||||||
29458 | RET C | ||||||||
The speech bubble is on screen.
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29459 | LD C,A | C=screen x-coordinate of the right edge of the text window within the speech bubble (6, 14, 22 or 30) | |||||||
29460 | LD A,(32613) | A=y-coordinate of the speech bubble lip | |||||||
29463 | SUB 154 | D=screen y-coordinate of the top row of the speech bubble (0-17) | |||||||
29465 | LD D,A | ||||||||
29466 | RRCA | Set HL to the display file address corresponding to the top right edge of the text window within the speech bubble | |||||||
29467 | RRCA | ||||||||
29468 | RRCA | ||||||||
29469 | AND 224 | ||||||||
29471 | ADD A,C | ||||||||
29472 | LD L,A | ||||||||
29473 | LD A,D | ||||||||
29474 | AND 24 | ||||||||
29476 | ADD A,68 | ||||||||
29478 | LD H,A | ||||||||
29479 | LD D,217 | C=width (in pixels) of the message character bitmap | |||||||
29481 | LD A,(DE) | ||||||||
29482 | LD C,A | ||||||||
Now we enter a loop to slide the pixel columns of the message character bitmap into the text window of the speech bubble.
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29483 | INC D | A=next pixel column of the message character bitmap | |||||||
29484 | LD A,(DE) | ||||||||
29485 | CALL 29491 | Slide this into the speech bubble text window | |||||||
29488 | DEC C | Next pixel column | |||||||
29489 | JR NZ,29483 | Jump back until all pixel columns are done | |||||||
29491 | PUSH HL | Store the display file address temporarily | |||||||
29492 | CALL 32216 | Slide the top four pixel rows of the text window one pixel to the left | |||||||
29495 | LD B,A | Store the message character pixel column in B temporarily | |||||||
29496 | LD A,L | Set HL to the display file address corresponding to the fifth pixel row down from the top right edge of the text window within the speech bubble | |||||||
29497 | ADD A,32 | ||||||||
29499 | LD L,A | ||||||||
29500 | JR C,29506 | ||||||||
29502 | LD A,H | ||||||||
29503 | SUB 8 | ||||||||
29505 | LD H,A | ||||||||
29506 | LD A,B | Restore the message character pixel column to A | |||||||
29507 | CALL 32216 | Slide the bottom four pixel rows of the text window one pixel to the left | |||||||
29510 | POP HL | Restore the display file address to HL | |||||||
29511 | XOR A | Reset the carry flag | |||||||
29512 | RET |
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