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gdi32: Add a null driver fallback implementation for non-antialiased text output.

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This commit is contained in:
Alexandre Julliard 2011-11-17 11:57:53 +01:00
parent 04396063c8
commit 5282ffadad
3 changed files with 152 additions and 6 deletions
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6
dlls/gdi32/driver.c
View File

@ -301,12 +301,6 @@ static BOOL nulldrv_ExtFloodFill( PHYSDEV dev, INT x, INT y, COLORREF color, UIN
return TRUE;
}
static BOOL nulldrv_ExtTextOut( PHYSDEV dev, INT x, INT y, UINT flags, const RECT *rect,
LPCWSTR str, UINT count, const INT *dx )
{
return TRUE;
}
static BOOL nulldrv_FontIsLinked( PHYSDEV dev )
{
return FALSE;

150
dlls/gdi32/font.c
View File

@ -1607,6 +1607,156 @@ BOOL WINAPI GetCharWidth32A( HDC hdc, UINT firstChar, UINT lastChar,
}
/* helper for nulldrv_ExtTextOut */
static DWORD get_glyph_bitmap( HDC hdc, UINT index, UINT aa_flags,
GLYPHMETRICS *metrics, struct gdi_image_bits *image )
{
UINT ggo_flags = aa_flags | GGO_GLYPH_INDEX;
static const MAT2 identity = { {0,1}, {0,0}, {0,0}, {0,1} };
UINT indices[3] = {0, 0, 0x20};
int i;
DWORD ret, size;
int stride;
indices[0] = index;
for (i = 0; i < sizeof(indices) / sizeof(indices[0]); index = indices[++i])
{
ret = GetGlyphOutlineW( hdc, index, ggo_flags, metrics, 0, NULL, &identity );
if (ret != GDI_ERROR) break;
}
if (ret == GDI_ERROR) return ERROR_NOT_FOUND;
if (!image) return ERROR_SUCCESS;
image->ptr = NULL;
image->free = NULL;
if (!ret) return ERROR_SUCCESS; /* empty glyph */
stride = get_dib_stride( metrics->gmBlackBoxX, 1 );
size = metrics->gmBlackBoxY * stride;
if (!(image->ptr = HeapAlloc( GetProcessHeap(), 0, size ))) return ERROR_OUTOFMEMORY;
image->is_copy = TRUE;
image->free = free_heap_bits;
ret = GetGlyphOutlineW( hdc, index, ggo_flags, metrics, size, image->ptr, &identity );
if (ret == GDI_ERROR)
{
HeapFree( GetProcessHeap(), 0, image->ptr );
return ERROR_NOT_FOUND;
}
return ERROR_SUCCESS;
}
/* helper for nulldrv_ExtTextOut */
static void draw_glyph( HDC hdc, INT origin_x, INT origin_y, const GLYPHMETRICS *metrics,
const struct gdi_image_bits *image, const RECT *clip )
{
static const BYTE masks[8] = {0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01};
UINT x, y, i, count;
BYTE *ptr = image->ptr;
int stride = get_dib_stride( metrics->gmBlackBoxX, 1 );
POINT *pts;
RECT rect, clipped_rect;
rect.left = origin_x + metrics->gmptGlyphOrigin.x;
rect.top = origin_y - metrics->gmptGlyphOrigin.y;
rect.right = rect.left + metrics->gmBlackBoxX;
rect.bottom = rect.top + metrics->gmBlackBoxY;
if (!clip) clipped_rect = rect;
else if (!intersect_rect( &clipped_rect, &rect, clip )) return;
pts = HeapAlloc( GetProcessHeap(), 0,
max(2,metrics->gmBlackBoxX) * metrics->gmBlackBoxY * sizeof(*pts) );
if (!pts) return;
count = 0;
ptr += (clipped_rect.top - rect.top) * stride;
for (y = clipped_rect.top; y < clipped_rect.bottom; y++, ptr += stride)
{
for (x = clipped_rect.left - rect.left; x < clipped_rect.right - rect.left; x++)
{
while (x < clipped_rect.right - rect.left && !(ptr[x / 8] & masks[x % 8])) x++;
pts[count].x = rect.left + x;
while (x < clipped_rect.right - rect.left && (ptr[x / 8] & masks[x % 8])) x++;
pts[count + 1].x = rect.left + x;
if (pts[count + 1].x > pts[count].x)
{
pts[count].y = pts[count + 1].y = y;
count += 2;
}
}
}
DPtoLP( hdc, pts, count );
for (i = 0; i < count; i += 2) Polyline( hdc, pts + i, 2 );
HeapFree( GetProcessHeap(), 0, pts );
}
/***********************************************************************
* nulldrv_ExtTextOut
*/
BOOL nulldrv_ExtTextOut( PHYSDEV dev, INT x, INT y, UINT flags, const RECT *rect,
LPCWSTR str, UINT count, const INT *dx )
{
UINT i;
DWORD err;
HGDIOBJ orig;
HPEN pen;
if (flags & ETO_OPAQUE)
{
RECT rc = *rect;
HBRUSH brush = CreateSolidBrush( GetNearestColor( dev->hdc, GetBkColor(dev->hdc) ));
if (brush)
{
orig = SelectObject( dev->hdc, brush );
DPtoLP( dev->hdc, (POINT *)&rc, 2 );
PatBlt( dev->hdc, rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top, PATCOPY );
SelectObject( dev->hdc, orig );
DeleteObject( brush );
}
}
if (!count) return TRUE;
pen = CreatePen( PS_SOLID, 1, GetTextColor(dev->hdc) );
orig = SelectObject( dev->hdc, pen );
for (i = 0; i < count; i++)
{
GLYPHMETRICS metrics;
struct gdi_image_bits image;
err = get_glyph_bitmap( dev->hdc, (UINT)str[i], GGO_BITMAP, &metrics, &image );
if (err) continue;
if (image.ptr) draw_glyph( dev->hdc, x, y, &metrics, &image, (flags & ETO_CLIPPED) ? rect : NULL );
if (image.free) image.free( &image );
if (dx)
{
if (flags & ETO_PDY)
{
x += dx[ i * 2 ];
y += dx[ i * 2 + 1];
}
else x += dx[ i ];
}
else
{
x += metrics.gmCellIncX;
y += metrics.gmCellIncY;
}
}
SelectObject( dev->hdc, orig );
DeleteObject( pen );
return TRUE;
}
/***********************************************************************
* ExtTextOutA (GDI32.@)
*

2
dlls/gdi32/gdi_private.h
View File

@ -358,6 +358,8 @@ extern BOOL nulldrv_CopyBitmap( HBITMAP src, HBITMAP dst ) DECLSPEC_HIDDEN;
extern BOOL nulldrv_EndPath( PHYSDEV dev ) DECLSPEC_HIDDEN;
extern INT nulldrv_ExcludeClipRect( PHYSDEV dev, INT left, INT top, INT right, INT bottom ) DECLSPEC_HIDDEN;
extern INT nulldrv_ExtSelectClipRgn( PHYSDEV dev, HRGN rgn, INT mode ) DECLSPEC_HIDDEN;
extern BOOL nulldrv_ExtTextOut( PHYSDEV dev, INT x, INT y, UINT flags, const RECT *rect,
LPCWSTR str, UINT count, const INT *dx ) DECLSPEC_HIDDEN;
extern BOOL nulldrv_FillPath( PHYSDEV dev ) DECLSPEC_HIDDEN;
extern BOOL nulldrv_FillRgn( PHYSDEV dev, HRGN rgn, HBRUSH brush ) DECLSPEC_HIDDEN;
extern BOOL nulldrv_FlattenPath( PHYSDEV dev ) DECLSPEC_HIDDEN;