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Implement DirectDrawPalette methods (#106)

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* Implement palettes

* Update miniwin/miniwin/src/miniwin_ddsurface.cpp

Co-authored-by: Anonymous Maarten <madebr@users.noreply.github.com>

* Update miniwin/miniwin/src/miniwin_ddpalette.cpp

* Update miniwin/miniwin/src/miniwin_ddraw.cpp

---------

Co-authored-by: Anonymous Maarten <madebr@users.noreply.github.com>
This commit is contained in:
Anders Jenbo 2025-05-18 01:17:07 +02:00 committed by GitHub
parent 51d88b6cd8
commit 44122f2f8a
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
4 changed files with 38 additions and 0 deletions
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4
miniwin/miniwin/src/include/miniwin_ddpalette_p.h
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@ -4,7 +4,11 @@
struct DirectDrawPaletteImpl : public IDirectDrawPalette {
DirectDrawPaletteImpl(LPPALETTEENTRY lpColorTable);
~DirectDrawPaletteImpl() override;
HRESULT GetCaps(LPDWORD lpdwCaps) override;
HRESULT GetEntries(DWORD dwFlags, DWORD dwBase, DWORD dwNumEntries, LPPALETTEENTRY lpEntries) override;
HRESULT SetEntries(DWORD dwFlags, DWORD dwStartingEntry, DWORD dwCount, LPPALETTEENTRY lpEntries) override;
private:
SDL_Palette* m_palette;
};

25
miniwin/miniwin/src/miniwin_ddpalette.cpp
View File

@ -1,8 +1,17 @@
#include "miniwin_ddpalette_p.h"
#include "miniwin_ddraw.h"
#include <SDL3/SDL.h>
DirectDrawPaletteImpl::DirectDrawPaletteImpl(LPPALETTEENTRY lpColorTable)
{
m_palette = SDL_CreatePalette(256);
SetEntries(0, 0, 256, lpColorTable);
}
DirectDrawPaletteImpl::~DirectDrawPaletteImpl()
{
SDL_DestroyPalette(m_palette);
}
HRESULT DirectDrawPaletteImpl::GetCaps(LPDWORD lpdwCaps)
@ -12,10 +21,26 @@ HRESULT DirectDrawPaletteImpl::GetCaps(LPDWORD lpdwCaps)
HRESULT DirectDrawPaletteImpl::GetEntries(DWORD dwFlags, DWORD dwBase, DWORD dwNumEntries, LPPALETTEENTRY lpEntries)
{
for (int i = dwBase; i < dwNumEntries; i++) {
lpEntries[i].peRed = m_palette->colors[i].r;
lpEntries[i].peGreen = m_palette->colors[i].g;
lpEntries[i].peBlue = m_palette->colors[i].b;
lpEntries[i].peFlags = PC_NONE;
}
return DD_OK;
}
HRESULT DirectDrawPaletteImpl::SetEntries(DWORD dwFlags, DWORD dwStartingEntry, DWORD dwCount, LPPALETTEENTRY lpEntries)
{
SDL_Color colors[256];
for (int i = 0; i < dwCount; i++) {
colors[i].r = lpEntries[i].peRed;
colors[i].g = lpEntries[i].peGreen;
colors[i].b = lpEntries[i].peBlue;
colors[i].a = SDL_ALPHA_OPAQUE;
}
SDL_SetPaletteColors(m_palette, colors, dwStartingEntry, dwCount);
return DD_OK;
}

4
miniwin/miniwin/src/miniwin_ddraw.cpp
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@ -45,6 +45,10 @@ HRESULT DirectDrawImpl::CreatePalette(
IUnknown* pUnkOuter
)
{
if ((dwFlags & DDPCAPS_8BIT) != DDPCAPS_8BIT) {
return DDERR_INVALIDPARAMS;
}
*lplpDDPalette = static_cast<LPDIRECTDRAWPALETTE>(new DirectDrawPaletteImpl(lpColorTable));
return DD_OK;
}

5
miniwin/miniwin/src/miniwin_ddsurface.cpp
View File

@ -21,6 +21,9 @@ DirectDrawSurfaceImpl::~DirectDrawSurfaceImpl()
if (m_texture) {
SDL_DestroyTexture(m_texture);
}
if (m_palette) {
m_palette->Release();
}
}
// IUnknown interface
@ -204,6 +207,8 @@ HRESULT DirectDrawSurfaceImpl::SetColorKey(DDColorKeyFlags dwFlags, LPDDCOLORKEY
HRESULT DirectDrawSurfaceImpl::SetPalette(LPDIRECTDRAWPALETTE lpDDPalette)
{
m_palette = lpDDPalette;
m_palette->AddRef();
return DD_OK;
}