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Perform win32 gui internal palette swapping only in case of a bpp change.

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This commit is contained in:
Volker Ruppert 2024-02-18 18:20:49 +01:00
parent abdbc52f22
commit 4455da0e1b
1 changed files with 23 additions and 21 deletions
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44
bochs/gui/win32.cc
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@ -2,7 +2,7 @@
// $Id$
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2002-2023 The Bochs Project
// Copyright (C) 2002-2024 The Bochs Project
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
@ -1891,26 +1891,28 @@ void bx_win32_gui_c::dimension_update(unsigned x, unsigned y, unsigned fheight,
}
bitmap_info->bmiHeader.biBitCount = bpp;
if (bpp == 16) {
bitmap_info->bmiHeader.biCompression = BI_BITFIELDS;
static RGBQUAD red_mask = {0x00, 0xF8, 0x00, 0x00};
static RGBQUAD green_mask = {0xE0, 0x07, 0x00, 0x00};
static RGBQUAD blue_mask = {0x1F, 0x00, 0x00, 0x00};
bitmap_info->bmiColors[256] = bitmap_info->bmiColors[0];
bitmap_info->bmiColors[257] = bitmap_info->bmiColors[1];
bitmap_info->bmiColors[258] = bitmap_info->bmiColors[2];
bitmap_info->bmiColors[0] = red_mask;
bitmap_info->bmiColors[1] = green_mask;
bitmap_info->bmiColors[2] = blue_mask;
} else {
if (current_bpp == 16) {
bitmap_info->bmiColors[0] = bitmap_info->bmiColors[256];
bitmap_info->bmiColors[1] = bitmap_info->bmiColors[257];
bitmap_info->bmiColors[2] = bitmap_info->bmiColors[258];
}
bitmap_info->bmiHeader.biCompression = BI_RGB;
if (bpp == 15) {
bitmap_info->bmiHeader.biBitCount = 16;
if (bpp != current_bpp) {
if (bpp == 16) {
bitmap_info->bmiHeader.biCompression = BI_BITFIELDS;
static RGBQUAD red_mask = {0x00, 0xF8, 0x00, 0x00};
static RGBQUAD green_mask = {0xE0, 0x07, 0x00, 0x00};
static RGBQUAD blue_mask = {0x1F, 0x00, 0x00, 0x00};
bitmap_info->bmiColors[256] = bitmap_info->bmiColors[0];
bitmap_info->bmiColors[257] = bitmap_info->bmiColors[1];
bitmap_info->bmiColors[258] = bitmap_info->bmiColors[2];
bitmap_info->bmiColors[0] = red_mask;
bitmap_info->bmiColors[1] = green_mask;
bitmap_info->bmiColors[2] = blue_mask;
} else {
if (current_bpp == 16) {
bitmap_info->bmiColors[0] = bitmap_info->bmiColors[256];
bitmap_info->bmiColors[1] = bitmap_info->bmiColors[257];
bitmap_info->bmiColors[2] = bitmap_info->bmiColors[258];
}
bitmap_info->bmiHeader.biCompression = BI_RGB;
if (bpp == 15) {
bitmap_info->bmiHeader.biBitCount = 16;
}
}
}
current_bpp = guest_bpp = bpp;