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AGS: Make VRAM 8 bits per pixel

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Before this, the virtual VRAM was 32 bits per pixel, with each pixel
holding an 8-bit index color or 0x80RRGGBB. The latter was for Ayumi-
chan Monogatari Jisshaban, which has been unsupported since system3-sdl2
was forked from System3 for Win32.

This change removes the 0x80RRGGBB format and makes the virtual VRAM 8
bits per pixel.
This commit is contained in:
kichikuou
2025-01-17 10:58:46 +09:00
parent 7f0bae6f74
commit 33418f8cb5
12 changed files with 40 additions and 96 deletions
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src/sys/ags.cpp
+12 -22
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@@ -79,14 +79,19 @@ AGS::AGS(const Config& config, const GameId& game_id) : game_id(game_id), dirty(
// DIBSection 8bpp * 3 (表, 裏, メニュー)
for(int i = 0; i < 3; i++) {
hBmpScreen[i] = SDL_CreateRGBSurface(0, 640, 480, 32, 0, 0, 0, 0);
hBmpScreen[i] = SDL_CreateRGBSurfaceWithFormat(0, 640, 480, 8, SDL_PIXELFORMAT_INDEX8);
// all surfaces share the same palette
if (i > 0) {
SDL_SetSurfacePalette(hBmpScreen[i], hBmpScreen[0]->format->palette);
}
// TODO: clear surface
// memset(lpBmpScreen[i], 0, 640 * 480 * sizeof(DWORD));
// 仮想VRAMへのポインタ取得
for(int j = 0; j < 480; j++) {
vram[i][j] = surface_line(hBmpScreen[i], j);
vram[i][j] = (uint8_t*)hBmpScreen[i]->pixels + hBmpScreen[i]->pitch * j;
}
}
@@ -448,11 +453,7 @@ void AGS::set_palette(int index, int r, int g, int b)
uint8 AGS::get_pixel(int dest, int x, int y)
{
if(vram[dest][y][x] & 0x80000000) {
return 0;
} else {
return (uint8)vram[dest][y][x];
}
return vram[dest][y][x];
}
void AGS::set_pixel(int dest, int x, int y, uint8 color)
@@ -496,15 +497,10 @@ void AGS::flush_screen(bool update)
{
if(update) {
for(int y = 0; y < screen_height; y++) {
uint32* src = vram[0][y];
uint8_t* src = vram[0][y];
uint32* dest = surface_line(hBmpDest, y);
for(int x = 0; x < screen_width; x++) {
if (game_id.sys_ver == 3 && src[x] & 0x80000000) {
// あゆみちゃん物語 フルカラー実写版
dest[x] = src[x] & 0xffffff;
} else {
dest[x] = screen_palette[src[x] & 0xff];
}
dest[x] = screen_palette[src[x]];
}
}
}
@@ -519,16 +515,10 @@ void AGS::draw_screen(int sx, int sy, int width, int height)
SDL_IntersectRect(&rect, &screen, &clip);
for (int y = clip.y; y < clip.y + clip.h; y++) {
uint32* src = vram[0][y];
uint8_t* src = vram[0][y];
uint32* dest = surface_line(hBmpDest, y);
for(int x = clip.x; x < clip.x + clip.w; x++) {
uint32 a=src[x];
if (game_id.sys_ver == 3 && src[x] & 0x80000000) {
// あゆみちゃん物語 フルカラー実写版
dest[x] = src[x] & 0xffffff;
} else {
dest[x] = screen_palette[src[x] & 0xff];
}
dest[x] = screen_palette[src[x]];
}
}
invalidate_screen(clip.x, clip.y, clip.w, clip.h);