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Routines |
Prev: 29441 | Up: Map | Next: 29513 |
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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