#include "miniwin_ddpalette_sdl3gpu.h"
#include "miniwin_ddraw.h"

#include <SDL3/SDL.h>

DirectDrawPalette_SDL3GPUImpl::DirectDrawPalette_SDL3GPUImpl(LPPALETTEENTRY lpColorTable)
{
	m_palette = SDL_CreatePalette(256);
	SetEntries(0, 0, 256, lpColorTable);
}

DirectDrawPalette_SDL3GPUImpl::~DirectDrawPalette_SDL3GPUImpl()
{
	SDL_DestroyPalette(m_palette);
}

HRESULT DirectDrawPalette_SDL3GPUImpl::GetEntries(
	DWORD dwFlags,
	DWORD dwBase,
	DWORD dwNumEntries,
	LPPALETTEENTRY lpEntries
)
{
	for (DWORD i = 0; i < dwNumEntries; i++) {
		lpEntries[i].peRed = m_palette->colors[dwBase + i].r;
		lpEntries[i].peGreen = m_palette->colors[dwBase + i].g;
		lpEntries[i].peBlue = m_palette->colors[dwBase + i].b;
		lpEntries[i].peFlags = PC_NONE;
	}
	return DD_OK;
}

HRESULT DirectDrawPalette_SDL3GPUImpl::SetEntries(
	DWORD dwFlags,
	DWORD dwStartingEntry,
	DWORD dwCount,
	LPPALETTEENTRY lpEntries
)
{
	SDL_Color colors[256];
	for (DWORD i = 0; i < dwCount; i++) {
		colors[i].r = lpEntries[dwStartingEntry + i].peRed;
		colors[i].g = lpEntries[dwStartingEntry + i].peGreen;
		colors[i].b = lpEntries[dwStartingEntry + i].peBlue;
		colors[i].a = SDL_ALPHA_OPAQUE;
	}

	SDL_SetPaletteColors(m_palette, colors, dwStartingEntry, dwCount);

	return DD_OK;
}