d3dkmt.c File Reference

#include <win32k.h>

Include dependency graph for d3dkmt.c:

Go to the source code of this file.

Functions
DWORD APIENTRY	NtGdiDdDDICreateDCFromMemory (D3DKMT_CREATEDCFROMMEMORY *desc)
DWORD APIENTRY	NtGdiDdDDIDestroyDCFromMemory (const D3DKMT_DESTROYDCFROMMEMORY *desc)

Function Documentation

NtGdiDdDDICreateDCFromMemory()

DWORD APIENTRY NtGdiDdDDICreateDCFromMemory

(

D3DKMT_CREATEDCFROMMEMORY *

desc

)

Definition at line 13 of file d3dkmt.c.

{
    PSURFACE psurf;
    HDC hDC;
 
    const struct d3dddi_format_info
    {
        D3DDDIFORMAT format;
        unsigned int bit_count;
        DWORD compression;
        unsigned int palette_size;
        DWORD mask_r, mask_g, mask_b;
    } *format = NULL;
    unsigned int i;
 
    static const struct d3dddi_format_info format_info[] =
    {
        { D3DDDIFMT_R8G8B8,   24, BI_RGB,       0,   0x00000000, 0x00000000, 0x00000000 },
        { D3DDDIFMT_A8R8G8B8, 32, BI_RGB,       0,   0x00000000, 0x00000000, 0x00000000 },
        { D3DDDIFMT_X8R8G8B8, 32, BI_RGB,       0,   0x00000000, 0x00000000, 0x00000000 },
        { D3DDDIFMT_R5G6B5,   16, BI_BITFIELDS, 0,   0x0000f800, 0x000007e0, 0x0000001f },
        { D3DDDIFMT_X1R5G5B5, 16, BI_BITFIELDS, 0,   0x00007c00, 0x000003e0, 0x0000001f },
        { D3DDDIFMT_A1R5G5B5, 16, BI_BITFIELDS, 0,   0x00007c00, 0x000003e0, 0x0000001f },
        { D3DDDIFMT_A4R4G4B4, 16, BI_BITFIELDS, 0,   0x00000f00, 0x000000f0, 0x0000000f },
        { D3DDDIFMT_X4R4G4B4, 16, BI_BITFIELDS, 0,   0x00000f00, 0x000000f0, 0x0000000f },
        { D3DDDIFMT_P8,       8,  BI_RGB,       256, 0x00000000, 0x00000000, 0x00000000 },
    };
 
    if (!desc)
        return STATUS_INVALID_PARAMETER;
 
    if (!desc->pMemory)
        return STATUS_INVALID_PARAMETER;
 
    for (i = 0; i < sizeof(format_info) / sizeof(*format_info); ++i)
    {
        if (format_info[i].format == desc->Format)
        {
            format = &format_info[i];
            break;
        }
    }
 
    if (!format)
        return STATUS_INVALID_PARAMETER;
 
    if (desc->Width > (UINT_MAX & ~3) / (format->bit_count / 8) ||
        !desc->Pitch || desc->Pitch < (((desc->Width * format->bit_count + 31) >> 3) & ~3) ||
        !desc->Height || desc->Height > UINT_MAX / desc->Pitch)
    {
        return STATUS_INVALID_PARAMETER;
    }
 
    if (!desc->hDeviceDc || !(hDC = NtGdiCreateCompatibleDC(desc->hDeviceDc)))
    {
        return STATUS_INVALID_PARAMETER;
    }
 
    /* Allocate a surface */
    psurf = SURFACE_AllocSurface(STYPE_BITMAP,
                                 desc->Width,
                                 desc->Height,
                                 BitmapFormat(format->bit_count, format->compression),
                                 BMF_TOPDOWN | BMF_NOZEROINIT,
                                 desc->Pitch,
                                 0,
                                 desc->pMemory);
 
    /* Mark as API bitmap */
    psurf->flags |= (DDB_SURFACE | API_BITMAP);
 
    desc->hDc = hDC;
    /* Get the handle for the bitmap */
    desc->hBitmap = (HBITMAP)psurf->SurfObj.hsurf;
 
    /* Allocate a palette for this surface */
    if (format->bit_count <= 8)
    {
        PPALETTE palette = PALETTE_AllocPalette(PAL_INDEXED, 1 << format->bit_count, NULL, 0, 0, 0);
        if (palette)
        {
            SURFACE_vSetPalette(psurf, palette);
            PALETTE_ShareUnlockPalette(palette);
        }
    }
 
    /* Unlock the surface and return */
    SURFACE_UnlockSurface(psurf);
 
    NtGdiSelectBitmap(desc->hDc, desc->hBitmap);
 
    return STATUS_SUCCESS;
}

NtGdiDdDDIDestroyDCFromMemory()

DWORD APIENTRY NtGdiDdDDIDestroyDCFromMemory

(

const D3DKMT_DESTROYDCFROMMEMORY *

desc

)

Definition at line 109 of file d3dkmt.c.

{
    if (!desc)
        return STATUS_INVALID_PARAMETER;
 
    if (GDI_HANDLE_GET_TYPE(desc->hDc) != GDI_OBJECT_TYPE_DC ||
        GDI_HANDLE_GET_TYPE(desc->hBitmap) != GDI_OBJECT_TYPE_BITMAP)
        return STATUS_INVALID_PARAMETER;
 
    NtGdiDeleteObjectApp(desc->hBitmap);
    NtGdiDeleteObjectApp(desc->hDc);
 
    return STATUS_SUCCESS;
}