C++ GdipFree函数代码示例

GpStatus
gdip_adjust_arrowcap_destroy (GpCustomLineCap *cap)
{
	if (!cap)
		return InvalidParameter;

	GdipFree (cap);
	return Ok;
}

GpStatus WINGDIPAPI GdipCreatePathGradient(GDIPCONST GpPointF* points,
    INT count, GpWrapMode wrap, GpPathGradient **grad)
{
    COLORREF col = ARGB2COLORREF(0xffffffff);

    if(!points || !grad)
        return InvalidParameter;

    if(count <= 0)
        return OutOfMemory;

    *grad = GdipAlloc(sizeof(GpPathGradient));
    if (!*grad) return OutOfMemory;

    (*grad)->pathdata.Count = count;
    (*grad)->pathdata.Points = GdipAlloc(count * sizeof(PointF));
    (*grad)->pathdata.Types = GdipAlloc(count);

    if(!(*grad)->pathdata.Points || !(*grad)->pathdata.Types){
        GdipFree((*grad)->pathdata.Points);
        GdipFree((*grad)->pathdata.Types);
        GdipFree(*grad);
        return OutOfMemory;
    }

    memcpy((*grad)->pathdata.Points, points, count * sizeof(PointF));
    memset((*grad)->pathdata.Types, PathPointTypeLine, count);

    (*grad)->brush.lb.lbStyle = BS_SOLID;
    (*grad)->brush.lb.lbColor = col;
    (*grad)->brush.lb.lbHatch = 0;

    (*grad)->brush.gdibrush = CreateSolidBrush(col);
    (*grad)->brush.bt = BrushTypePathGradient;
    (*grad)->centercolor = 0xffffffff;
    (*grad)->wrap = wrap;
    (*grad)->gamma = FALSE;
    (*grad)->center.X = 0.0;
    (*grad)->center.Y = 0.0;
    (*grad)->focus.X = 0.0;
    (*grad)->focus.Y = 0.0;

    return Ok;
}

GpStatus
cairo_DrawString (GpGraphics *graphics, GDIPCONST WCHAR *stringUnicode, int length, GDIPCONST GpFont *font, GDIPCONST RectF *rc, 
	GDIPCONST GpStringFormat *format, GpBrush *brush)
{
	cairo_matrix_t SavedMatrix;
	GpStringFormat *fmt;
	GpStringDetailStruct *StringDetails;
	WCHAR *CleanString;
	GpDrawTextData data; /* avoid recomputation of stuff done while measuring */
	int StringLen = length;

	GpStatus status = AllocStringData (&CleanString, &StringDetails, length);
	if (status != Ok)
		return status;

	/* a NULL format is valid, it means get the generic default values (and free them later) */
	if (!format) {
		GdipStringFormatGetGenericDefault ((GpStringFormat **)&fmt);
	} else {
		fmt = (GpStringFormat *)format;
	}

	/* is the following ok ? */
	cairo_get_font_matrix (graphics->ct, &SavedMatrix);

	status = MeasureString (graphics, stringUnicode, &StringLen, font, rc, fmt, brush, NULL, NULL, NULL, CleanString, StringDetails, &data);
	if ((status == Ok) && (StringLen > 0)) {
		status = DrawString (graphics, stringUnicode, StringLen, font, rc, fmt, brush, CleanString, StringDetails, &data);
	}

	/* Restore matrix to original values */
	cairo_set_font_matrix (graphics->ct, &SavedMatrix);

	/* Cleanup */
	GdipFree (CleanString);
	GdipFree (StringDetails);

	/* we must delete the default stringformat (when one wasn't provided by the caller) */
	if (format != fmt)
		GdipDeleteStringFormat (fmt);

	return status;
}

/*****************************************************************************
 * GdipDeleteFontFamily [[email protected]]
 *
 * Removes the specified FontFamily
 *
 * PARAMS
 *  *FontFamily         [I] The family to delete
 *
 * RETURNS
 *  SUCCESS: Ok
 *  FAILURE: InvalidParameter if FontFamily is NULL.
 *
 */
GpStatus WINGDIPAPI GdipDeleteFontFamily(GpFontFamily *FontFamily)
{
    if (!FontFamily)
        return InvalidParameter;
    TRACE("Deleting %p (%s)\n", FontFamily, debugstr_w(FontFamily->FamilyName));

    GdipFree (FontFamily);

    return Ok;
}

/* free all nodes including argument */
static void free_path_list(path_list_node_t *node)
{
    path_list_node_t *n = node;

    while(n) {
        n = n->next;
        GdipFree(node);
        node = n;
    }
}

/*****************************************************************************
 * GdipCombineRegionRect [[email protected]]
 */
GpStatus WINGDIPAPI GdipCombineRegionRect(GpRegion *region,
        GDIPCONST GpRectF *rect, CombineMode mode)
{
    GpRegion *rect_region;
    region_element *left, *right = NULL;
    GpStatus stat;

    TRACE("%p %s %d\n", region, debugstr_rectf(rect), mode);

    if (!(region && rect))
        return InvalidParameter;

    stat = GdipCreateRegionRect(rect, &rect_region);
    if (stat != Ok)
        return stat;

    /* simply replace region data */
    if(mode == CombineModeReplace){
        delete_element(&region->node);
        memcpy(region, rect_region, sizeof(GpRegion));
        GdipFree(rect_region);
        return Ok;
    }

    left = GdipAlloc(sizeof(region_element));
    if (left)
    {
        memcpy(left, &region->node, sizeof(region_element));
        stat = clone_element(&rect_region->node, &right);
        if (stat == Ok)
        {
            fuse_region(region, left, right, mode);
            GdipDeleteRegion(rect_region);
            return Ok;
        }
    }
    else
        stat = OutOfMemory;

    GdipFree(left);
    GdipDeleteRegion(rect_region);
    return stat;
}

/* FIXME: path gradient brushes not truly supported (drawn as solid brushes) */
GpStatus WINGDIPAPI GdipCreatePathGradientFromPath(GDIPCONST GpPath* path,
    GpPathGradient **grad)
{
    COLORREF col = ARGB2COLORREF(0xffffffff);

    if(!path || !grad)
        return InvalidParameter;

    *grad = GdipAlloc(sizeof(GpPathGradient));
    if (!*grad) return OutOfMemory;

    (*grad)->pathdata.Count = path->pathdata.Count;
    (*grad)->pathdata.Points = GdipAlloc(path->pathdata.Count * sizeof(PointF));
    (*grad)->pathdata.Types = GdipAlloc(path->pathdata.Count);

    if(!(*grad)->pathdata.Points || !(*grad)->pathdata.Types){
        GdipFree((*grad)->pathdata.Points);
        GdipFree((*grad)->pathdata.Types);
        GdipFree(*grad);
        return OutOfMemory;
    }

    memcpy((*grad)->pathdata.Points, path->pathdata.Points,
           path->pathdata.Count * sizeof(PointF));
    memcpy((*grad)->pathdata.Types, path->pathdata.Types, path->pathdata.Count);

    (*grad)->brush.lb.lbStyle = BS_SOLID;
    (*grad)->brush.lb.lbColor = col;
    (*grad)->brush.lb.lbHatch = 0;

    (*grad)->brush.gdibrush = CreateSolidBrush(col);
    (*grad)->brush.bt = BrushTypePathGradient;
    (*grad)->centercolor = 0xffffffff;
    (*grad)->wrap = WrapModeClamp;
    (*grad)->gamma = FALSE;
    /* FIXME: this should be set to the "centroid" of the path by default */
    (*grad)->center.X = 0.0;
    (*grad)->center.Y = 0.0;
    (*grad)->focus.X = 0.0;
    (*grad)->focus.Y = 0.0;

    return Ok;
}

/*******************************************************************************
 * GdipCreateFont [[email protected]]
 *
 * Create a new font based off of a FontFamily
 *
 * PARAMS
 *  *fontFamily     [I] Family to base the font off of
 *  emSize          [I] Size of the font
 *  style           [I] Bitwise OR of FontStyle enumeration
 *  unit            [I] Unit emSize is measured in
 *  **font          [I] the resulting Font object
 *
 * RETURNS
 *  SUCCESS: Ok
 *  FAILURE: InvalidParameter if fontfamily or font is NULL.
 *  FAILURE: FontFamilyNotFound if an invalid FontFamily is given
 *
 * NOTES
 *  UnitDisplay is unsupported.
 *  emSize is stored separately from lfHeight, to hold the fraction.
 */
GpStatus WINGDIPAPI GdipCreateFont(GDIPCONST GpFontFamily *fontFamily,
                        REAL emSize, INT style, Unit unit, GpFont **font)
{
    HFONT hfont;
    OUTLINETEXTMETRICW otm;
    LOGFONTW lfw;
    HDC hdc;
    GpStatus stat;
    int ret;

    if (!fontFamily || !font || emSize < 0.0)
        return InvalidParameter;

    TRACE("%p (%s), %f, %d, %d, %p\n", fontFamily,
            debugstr_w(fontFamily->FamilyName), emSize, style, unit, font);

    memset(&lfw, 0, sizeof(lfw));

    stat = GdipGetFamilyName(fontFamily, lfw.lfFaceName, LANG_NEUTRAL);
    if (stat != Ok) return stat;

    lfw.lfHeight = -units_to_pixels(emSize, unit, fontFamily->dpi);
    lfw.lfWeight = style & FontStyleBold ? FW_BOLD : FW_REGULAR;
    lfw.lfItalic = style & FontStyleItalic;
    lfw.lfUnderline = style & FontStyleUnderline;
    lfw.lfStrikeOut = style & FontStyleStrikeout;

    hfont = CreateFontIndirectW(&lfw);
    hdc = CreateCompatibleDC(0);
    SelectObject(hdc, hfont);
    otm.otmSize = sizeof(otm);
    ret = GetOutlineTextMetricsW(hdc, otm.otmSize, &otm);
    DeleteDC(hdc);
    DeleteObject(hfont);

    if (!ret) return NotTrueTypeFont;

    *font = GdipAlloc(sizeof(GpFont));
    if (!*font) return OutOfMemory;

    (*font)->unit = unit;
    (*font)->emSize = emSize;
    (*font)->otm = otm;

    stat = clone_font_family(fontFamily, &(*font)->family);
    if (stat != Ok)
    {
        GdipFree(*font);
        return stat;
    }

    TRACE("<-- %p\n", *font);

    return Ok;
}

/*****************************************************************************
 * GdipCombineRegionPath [[email protected]]
 */
GpStatus WINGDIPAPI GdipCombineRegionPath(GpRegion *region, GpPath *path, CombineMode mode)
{
    GpRegion *path_region;
    region_element *left, *right = NULL;
    GpStatus stat;

    TRACE("%p %p %d\n", region, path, mode);

    if (!(region && path))
        return InvalidParameter;

    stat = GdipCreateRegionPath(path, &path_region);
    if (stat != Ok)
        return stat;

    /* simply replace region data */
    if(mode == CombineModeReplace){
        delete_element(&region->node);
        memcpy(region, path_region, sizeof(GpRegion));
        GdipFree(path_region);
        return Ok;
    }

    left = GdipAlloc(sizeof(region_element));
    if (left)
    {
        *left = region->node;
        stat = clone_element(&path_region->node, &right);
        if (stat == Ok)
        {
            fuse_region(region, left, right, mode);
            GdipDeleteRegion(path_region);
            return Ok;
        }
    }
    else
        stat = OutOfMemory;

    GdipFree(left);
    GdipDeleteRegion(path_region);
    return stat;
}

/*******************************************************************************
 * GdipDeleteFont [[email protected]]
 */
GpStatus WINGDIPAPI GdipDeleteFont(GpFont* font)
{
    TRACE("(%p)\n", font);

    if(!font)
        return InvalidParameter;

    GdipFree(font);

    return Ok;
}

GpStatus
cairo_MeasureString (GpGraphics *graphics, GDIPCONST WCHAR *stringUnicode, int length, GDIPCONST GpFont *font, GDIPCONST RectF *rc,
	GDIPCONST GpStringFormat *format,  RectF *boundingBox, int *codepointsFitted, int *linesFilled)
{
	cairo_matrix_t SavedMatrix;
	GpStringFormat *fmt;
	GpStringDetailStruct *StringDetails;
	WCHAR *CleanString;
	int StringLen = length;
	GpStatus status;

	status = AllocStringData (&CleanString, &StringDetails, length);
	if (status != Ok)
		return status;

	/* a NULL format is valid, it means get the generic default values (and free them later) */
	if (!format) {
		GdipStringFormatGetGenericDefault ((GpStringFormat **)&fmt);
	} else {
		fmt = (GpStringFormat *)format;
	}

	/* is the following ok ? */
	cairo_get_font_matrix (graphics->ct, &SavedMatrix);

	status = MeasureString (graphics, stringUnicode, &StringLen, font, rc, fmt, NULL, boundingBox, codepointsFitted, 
		linesFilled, CleanString, StringDetails, NULL);

	/* Restore matrix to original values */
	cairo_set_font_matrix (graphics->ct, &SavedMatrix);

	/* Cleanup */
	GdipFree (CleanString);
	GdipFree (StringDetails);

	/* we must delete the default stringformat (when one wasn't provided by the caller) */
	if (format != fmt)
		GdipDeleteStringFormat (fmt);

	return status;
}

/*****************************************************************************
 * GdipDeleteRegion [[email protected]]
 */
GpStatus WINGDIPAPI GdipDeleteRegion(GpRegion *region)
{
    TRACE("%p\n", region);

    if (!region)
        return InvalidParameter;

    delete_element(&region->node);
    GdipFree(region);

    return Ok;
}

/* Transforms GpRegion elements with given matrix */
static GpStatus transform_region_element(region_element* element, GpMatrix *matrix)
{
    GpStatus stat;

    switch(element->type)
    {
        case RegionDataEmptyRect:
        case RegionDataInfiniteRect:
            return Ok;
        case RegionDataRect:
        {
            /* We can't transform a rectangle, so convert it to a path. */
            GpRegion *new_region;
            GpPath *path;

            stat = GdipCreatePath(FillModeAlternate, &path);
            if (stat == Ok)
            {
                stat = GdipAddPathRectangle(path,
                    element->elementdata.rect.X, element->elementdata.rect.Y,
                    element->elementdata.rect.Width, element->elementdata.rect.Height);

                if (stat == Ok)
                    stat = GdipCreateRegionPath(path, &new_region);

                GdipDeletePath(path);
            }

            if (stat == Ok)
            {
                /* Steal the element from the created region. */
                memcpy(element, &new_region->node, sizeof(region_element));
                GdipFree(new_region);
            }
            else
                return stat;
        }
        /* Fall-through to do the actual conversion. */
        case RegionDataPath:
            if (!element->elementdata.path->pathdata.Count)
                return Ok;

            stat = GdipTransformMatrixPoints(matrix,
                element->elementdata.path->pathdata.Points,
                element->elementdata.path->pathdata.Count);
            return stat;
        default:
            stat = transform_region_element(element->elementdata.combine.left, matrix);
            if (stat == Ok)
                stat = transform_region_element(element->elementdata.combine.right, matrix);
            return stat;
    }
}

/*****************************************************************************
 * GdipCombineRegionRegion [[email protected]]
 */
GpStatus WINGDIPAPI GdipCombineRegionRegion(GpRegion *region1,
        GpRegion *region2, CombineMode mode)
{
    region_element *left, *right = NULL;
    GpStatus stat;
    GpRegion *reg2copy;

    TRACE("%p %p %d\n", region1, region2, mode);

    if(!(region1 && region2))
        return InvalidParameter;

    /* simply replace region data */
    if(mode == CombineModeReplace){
        stat = GdipCloneRegion(region2, &reg2copy);
        if(stat != Ok)  return stat;

        delete_element(&region1->node);
        memcpy(region1, reg2copy, sizeof(GpRegion));
        GdipFree(reg2copy);
        return Ok;
    }

    left  = GdipAlloc(sizeof(region_element));
    if (!left)
        return OutOfMemory;

    *left = region1->node;
    stat = clone_element(&region2->node, &right);
    if (stat != Ok)
    {
        GdipFree(left);
        return OutOfMemory;
    }

    fuse_region(region1, left, right, mode);
    region1->num_children += region2->num_children;

    return Ok;
}

/* coverity[+alloc : arg-*2] */
GpStatus WINGDIPAPI
GdipCreateTexture (GpImage *image, GpWrapMode wrapMode, GpTexture **texture)
{
	cairo_surface_t *imageSurface = NULL;
	GpTexture	*result;
	GpStatus status;

	if (!image || !texture)
		return InvalidParameter;

	if ((wrapMode < WrapModeTile) || (wrapMode > WrapModeClamp))
		return OutOfMemory;

	if (image->type != ImageTypeBitmap)
		return NotImplemented;

	result = gdip_texture_new ();
	if (!result)
		return OutOfMemory;

	result->image = NULL;
	status = GdipCloneImage (image, &result->image);
	if (status != Ok)
		goto failure;

	/* note: we must keep the scan0 alive, so we must use the cloned image (and not the original) see bug #80971 */
	imageSurface = cairo_image_surface_create_for_data ((BYTE*)result->image->active_bitmap->scan0,
		image->cairo_format, image->active_bitmap->width, image->active_bitmap->height, image->active_bitmap->stride);
	if (!imageSurface)
		goto failure;

	result->wrapMode = wrapMode;
	if (result->image->surface)
		cairo_surface_destroy (result->image->surface);
	result->image->surface = imageSurface;
	result->rectangle.X = 0;
	result->rectangle.Y = 0;
	result->rectangle.Width = image->active_bitmap->width;
	result->rectangle.Height = image->active_bitmap->height;

	*texture = result;
	return Ok;

failure:
	if (result->image)
		GdipDisposeImage (result->image);
	if (imageSurface)
		cairo_surface_destroy (imageSurface);
	GdipFree (result);
	*texture = NULL;
	return status;
}