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use faster method to check for palette changes

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FunkyFr3sh 2024-12-16 22:03:23 +01:00
parent f58c4a4978
commit 4b0f0f2cf5
1 changed files with 3 additions and 4 deletions
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7
src/ddpalette.c
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@ -5,7 +5,6 @@
#include "ddsurface.h" #include "ddsurface.h"
#include "IDirectDrawPalette.h" #include "IDirectDrawPalette.h"
#include "debug.h" #include "debug.h"
#include "crc32.h"
HRESULT ddp_GetEntries( HRESULT ddp_GetEntries(
@ -39,11 +38,11 @@ HRESULT ddp_SetEntries(
if (!lpEntries) if (!lpEntries)
return DDERR_INVALIDPARAMS; return DDERR_INVALIDPARAMS;
unsigned long crc32 = 0; RGBQUAD data_rgb[256];
if ((dwFlags & DDPCAPS_REFRESH_CHANGED_ONLY)) if ((dwFlags & DDPCAPS_REFRESH_CHANGED_ONLY))
{ {
crc32 = Crc32_ComputeBuf(0, This->data_rgb, sizeof(This->data_rgb)); memcpy(data_rgb, This->data_rgb, sizeof(This->data_rgb));
} }
for (int i = dwStartingEntry, x = 0; i < dwStartingEntry + dwCount && i < 256; i++, x++) for (int i = dwStartingEntry, x = 0; i < dwStartingEntry + dwCount && i < 256; i++, x++)
@ -72,7 +71,7 @@ HRESULT ddp_SetEntries(
This->data_rgb[255].rgbReserved = 0; This->data_rgb[255].rgbReserved = 0;
} }
if (crc32 && crc32 == Crc32_ComputeBuf(0, This->data_rgb, sizeof(This->data_rgb))) if ((dwFlags & DDPCAPS_REFRESH_CHANGED_ONLY) && memcmp(data_rgb, This->data_rgb, sizeof(This->data_rgb)) == 0)
{ {
// do not set palette_updated BOOL if nothing changed // do not set palette_updated BOOL if nothing changed
return DD_OK; return DD_OK;