bool ZCompare(u16 x, u16 y, u32 z)
{
u32 offset = GetDepthOffset(x, y);
u32 depth = GetPixelDepth(offset);
bool pass;
switch (bpmem.zmode.func)
{
case ZMode::NEVER:
pass = false;
break;
case ZMode::LESS:
pass = z < depth;
break;
case ZMode::EQUAL:
pass = z == depth;
break;
case ZMode::LEQUAL:
pass = z <= depth;
break;
case ZMode::GREATER:
pass = z > depth;
break;
case ZMode::NEQUAL:
pass = z != depth;
break;
case ZMode::GEQUAL:
pass = z >= depth;
break;
case ZMode::ALWAYS:
pass = true;
break;
default:
pass = false;
ERROR_LOG(VIDEO, "Bad Z compare mode %i", (int)bpmem.zmode.func);
}
if (pass && bpmem.zmode.updateenable)
{
SetPixelDepth(offset, z);
}
return pass;
}
NS_IMETHODIMP
nsScreenOS2 :: GetColorDepth(PRInt32 *aColorDepth)
{
return GetPixelDepth ( aColorDepth );
} // GetColorDepth
NS_IMETHODIMP
nsScreenWin :: GetColorDepth(int32_t *aColorDepth)
{
return GetPixelDepth(aColorDepth);
} // GetColorDepth
u32 GetDepth(u16 x, u16 y)
{
u32 offset = GetDepthOffset(x, y);
return GetPixelDepth(offset);
}
EFI_STATUS InitDisplays()
{
UINTN size = 0;
EFI_HANDLE* handles = nullptr;
EFI_STATUS status;
// LocateHandle() should only be called twice... But I don't want to write it twice :)
while ((status = BS->LocateHandle(ByProtocol, &g_efiGraphicsOutputProtocolGuid, nullptr, &size, handles)) == EFI_BUFFER_TOO_SMALL)
{
handles = (EFI_HANDLE*)realloc(handles, size);
if (!handles)
{
return EFI_OUT_OF_RESOURCES;
}
}
if (EFI_ERROR(status))
{
return status;
}
const int count = size / sizeof(EFI_HANDLE);
for (int i = 0; i != count; ++i)
{
EFI_DEVICE_PATH_PROTOCOL* dpp = nullptr;
BS->HandleProtocol(handles[i], &g_efiDevicePathProtocolGuid, (void**)&dpp);
// If dpp is NULL, this is the "Console Splitter" driver. It is used to draw on all
// screens at the same time and doesn't represent a real hardware device.
if (!dpp) continue;
EFI_GRAPHICS_OUTPUT_PROTOCOL* gop = nullptr;
BS->HandleProtocol(handles[i], &g_efiGraphicsOutputProtocolGuid, (void**)&gop);
EFI_EDID_ACTIVE_PROTOCOL* edid = nullptr;
BS->HandleProtocol(handles[i], &g_efiEdidActiveProtocolGuid, (void**)&edid);
InitDisplay(gop, edid);
if (g_bootInfo.framebufferCount < ARRAY_LENGTH(BootInfo::framebuffers))
{
Framebuffer* fb = &g_bootInfo.framebuffers[g_bootInfo.framebufferCount];
auto info = gop->Mode->Info;
auto pixelFormat = DeterminePixelFormat(info);
fb->width = info->HorizontalResolution;
fb->height = info->VerticalResolution;
fb->pitch = info->PixelsPerScanLine * GetPixelDepth(pixelFormat);
fb->format = pixelFormat;
fb->pixels = (uintptr_t)gop->Mode->FrameBufferBase;
g_bootInfo.framebufferCount += 1;
}
}
free(handles);
// Initialize the graphics console
if (g_bootInfo.framebufferCount > 0)
{
Framebuffer* fb = g_bootInfo.framebuffers;
g_frameBuffer.width = fb->width;
g_frameBuffer.height = fb->height;
g_frameBuffer.pitch = fb->pitch;
g_frameBuffer.pixels = (void*)fb->pixels;
g_frameBuffer.format = fb->format;
g_graphicsConsole.Initialize(&g_frameBuffer);
g_graphicsConsole.Clear();
g_console = &g_graphicsConsole;
}
return EFI_SUCCESS;
}
