SCALER Normal4-6x (DOSBOX) \ VOGONS

SCALER Normal4-6x (DOSBOX)

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First post, by VileR

Posted on 2013-04-12, 16:31

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Attached appears to be a fixed-up diff.
However, compiling with mingw results in screen corruption on CLS *if* normal6x is used (no issue with 4x, 5x). Wonder what's up with that.

(Edit by Dominus: on request the patches have been split off the topic Re: normal4x, normal5x, one day ? and put into the patches forum)

Reply 1 of 4, by VileR

Posted on 2013-11-26, 19:31

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Added feature: "normal2x" and "normal3x" now work in double-width/double-height modes too.

Normally the internal scalers have zero effect on:

CGA/EGA 640x200
Composite CGA
CGA/pcjr/tandy 80-column text (incl. "160x100" games like Round 42)
EGA/VGA 40-column text
various tweaked VGA modes (320x400, 360x480/350, etc.)

The updated patch allows simple 2x/3x scaling for all of the above. You have to specify the 'forced' parameter (e.g. "scaler=normal2x forced"); this is a deliberate choice, mainly for consistency's sake.

(Moderators: could this thread be moved to the patches section?)

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Reply 2 of 4, by Qbix

Posted on 2019-09-04, 14:33

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Sorry, removed the reply.
Not sure about which index to increase.
But the problem is that you are probably outside the writecache for normal6x

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Reply 3 of 4, by Qbix

Posted on 2019-09-04, 14:44

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This might fix the problem you had with normal6x

1Index: render_scalers.cpp
2===================================================================
3--- render_scalers.cpp	(revision 4254)
4+++ render_scalers.cpp	(working copy)
5@@ -30,9 +30,9 @@
6 Bitu Scaler_ChangedLineIndex;
7 
8 static union {
9-	Bit32u b32 [4][SCALER_MAXWIDTH*3];
10-	Bit16u b16 [4][SCALER_MAXWIDTH*3];
11-	Bit8u b8 [4][SCALER_MAXWIDTH*3];
12+	Bit32u b32 [5][SCALER_MAXWIDTH*3];
13+	Bit16u b16 [5][SCALER_MAXWIDTH*3];
14+	Bit8u b8 [5][SCALER_MAXWIDTH*3];
15 } scalerWriteCache;
16 //scalerFrameCache_t scalerFrameCache;
17 scalerSourceCache_t scalerSourceCache;

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Reply 4 of 4, by Qbix

Posted on 2019-09-04, 14:56

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the times 3 might be needed to increased as well (to times 6). But I have to double check that.
Seems to make sense to do that as well..

1Index: render_scalers.cpp
2===================================================================
3--- render_scalers.cpp	(revision 4254)
4+++ render_scalers.cpp	(working copy)
5@@ -30,9 +30,9 @@
6 Bitu Scaler_ChangedLineIndex;
7 
8 static union {
9-	Bit32u b32 [4][SCALER_MAXWIDTH*3];
10-	Bit16u b16 [4][SCALER_MAXWIDTH*3];
11-	Bit8u b8 [4][SCALER_MAXWIDTH*3];
12+	Bit32u b32 [5][SCALER_MAXWIDTH*6];
13+	Bit16u b16 [5][SCALER_MAXWIDTH*6];
14+	Bit8u b8 [5][SCALER_MAXWIDTH*6];
15 } scalerWriteCache;
16 //scalerFrameCache_t scalerFrameCache;
17 scalerSourceCache_t scalerSourceCache;

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