shape.cpp

一个GNU的开源软件,基于linux下X-Window的flash播放器,工作稳定,方便移植和修改

    long curNbFillStyles;
    StyleList *sl;
    ShapeParser sp1,*sp=&sp1;
    BitParser *b;
    Matrix     mat,*matrix;

    mat = (*gd->adjust) * (*matrix1);
    matrix = &mat;
    
    sp->reverse = (mat.a * mat.d) < 0;

    curLineStyle = NULL;
    curNbLineStyles = 0;
    curFillStyle = NULL;
    curNbFillStyles = 0;
    sp->style_list = NULL;

    sp->shape = shape;
    sp->gd = gd;
    sp->matrix = matrix;
    sp->cxform = cxform;
    sp->dict = shape->dict;

    if (shapeAction == ShapeGetRegion) {
        gd->scan_line_func = scan_line_func;
        gd->scan_line_func_id = id;
    } else {
        gd->scan_line_func = NULL;
    }

    b = &sp->bit_parser;
    InitBitParser(b,shape->file_ptr);

    if (shape->getStyles) {
        // ShapeWithStyle
        curFillStyle = ParseFillStyle(sp, &curNbFillStyles, shape->getAlpha);
	if (curFillStyle == NULL) return;

        curLineStyle = ParseLineStyle(sp, &curNbLineStyles, shape->getAlpha);
	if (curLineStyle == NULL) return;

        sl = new StyleList;
	if (sl == NULL) return;

        sl->next = NULL;
        sl->newFillStyles = curFillStyle;
        sl->nbNewFillStyles = curNbFillStyles;
        sl->newLineStyles = curLineStyle;
        sl->nbNewLineStyles = curNbLineStyles;

        sp->style_list = sl;

        if (shapeAction == ShapeDraw) {
            prepareStyles(gd, matrix, cxform, curFillStyle, curNbFillStyles);
        }
    }
        
    InitBits(b);
    sp->m_nFillBits = (U16) GetBits(b,4);
    sp->m_nLineBits = (U16) GetBits(b,4);

    l = 0;
    f0 = 0;
    f1 = 0;
    firstPoint = 1;
    lastX = 0;
    lastY = 0;
    sp->curPath.nb_edges = 0;
    sp->first_line = NULL;
    sp->last_line = NULL;

    for(;;) {
        if (ParseShapeRecord(sp, sr, shape->getAlpha) == 0) break;

        switch (sr->type)
        {
            case shapeNonEdge:
                if (sr->flags & flagsNewStyles) {

                    curFillStyle = sr->newFillStyles;
                    curNbFillStyles = sr->nbNewFillStyles;
                    curLineStyle = sr->newLineStyles;
                    curNbLineStyles = sr->nbNewLineStyles;
                    
                    sl = new StyleList;
                    sl->next = sp->style_list;
                    sl->newFillStyles = sr->newFillStyles;
                    sl->nbNewFillStyles = sr->nbNewFillStyles;
                    sl->newLineStyles = sr->newLineStyles;
                    sl->nbNewLineStyles = sr->nbNewLineStyles;

                    sp->style_list = sl;

                    if (shapeAction == ShapeDraw) {
                        prepareStyles(gd, matrix, cxform, curFillStyle, curNbFillStyles);
                    }
                }
                if (sr->flags & flagsFill0) {
                    if (sr->fillStyle0) {
                        if (curFillStyle) {
                            f0 = &curFillStyle[sr->fillStyle0-1];
                        } else {
                            f0 = &shape->defaultFillStyle;
                        }
                    } else {
                        f0 = 0;
                    }
                }
                if (sr->flags & flagsFill1) {
                    if (sr->fillStyle1) {
                        if (curFillStyle) {
                            f1 = &curFillStyle[sr->fillStyle1-1];
                        } else {
                            f1 = &shape->defaultFillStyle;
                        }
                    } else {
                        f1 = 0;
                    }
                }
                if (sr->flags & flagsLine) {
                    if (sr->lineStyle) {
                        l = &curLineStyle[sr->lineStyle-1];
                    } else {
                        l = 0;
                    }
                }
                if (sr->flags & flagsMoveTo) {
                    if (sp->curPath.nb_edges == 0) {
                        /* if no edges, draw the polygon, then the lines */
                        flushPaths(sp);
                    }

                    newPath(sp, sr->x, sr->y);
                    firstPoint = 0;

                    lastX = sr->x;
                    lastY = sr->y;

#if PRINT
                    printf("---------\nX,Y    = %4d,%4d\n", sr->x/20, sr->y/20);
#endif
                }
                break;
            case shapeCurve:
                // Handle Bezier Curves !!!
                if (firstPoint) {
                    newPath(sp, 0, 0);
                    firstPoint = 0;
                }
                {
                    long newX,newY,ctrlX,ctrlY;
                    
                    ctrlX = lastX+sr->ctrlX;
                    ctrlY = lastY+sr->ctrlY;
                    newX = ctrlX+sr->anchorX;
                    newY = ctrlY+sr->anchorY;

#if 1
                    addBezier(sp, ctrlX, ctrlY, newX, newY, f0 , f1, l);
#else
                    addLine(sp, newX, newY, f0, f1, l);
#endif
                    
                    lastX = newX;
                    lastY = newY;
                }
                break;
            case shapeLine:
                if (firstPoint) {
                    newPath(sp, 0, 0);
                    firstPoint = 0;
                }

                lastX += sr->dX;
                lastY += sr->dY;

                addLine(sp, lastX, lastY, f0, f1, l);
#if PRINT
                printf(" X, Y  = %4d,%4d\n", lastX/20, lastY/20);
#endif
                break;
        }
    }

    /* XXX: should test if there is something to draw */
    flushPaths(sp);

    /* free the styles */
    while (sp->style_list) {
        StyleList *sl;
        
        sl=sp->style_list;
        sp->style_list = sl->next;
        
        if (shapeAction == ShapeDraw) {
            clearStyles(gd, sl->newFillStyles, sl->nbNewFillStyles);
        }

        delete[] sl->newFillStyles;
        delete[] sl->newLineStyles;
        
        delete sl;
    }
}

static void
prepareStyles(GraphicDevice *gd, Matrix *matrix, Cxform *cxform, 
              FillStyleDef *ftab, long n)
{
    long fs;
    FillStyleDef *f;

    for(fs = 0; fs < n; fs++)
    {
        f = ftab + fs;
        switch (f->type)
        {
            case f_None:
	    	break;
            case f_Solid:
                if (cxform) {
                    f->color = cxform->getColor(f->color);
                }
                f->color.pixel = gd->allocColor(f->color);
                break;
            case f_LinearGradient:
            case f_RadialGradient:
                {
                    Matrix mat;
                    int  n,r,l;
                    long red, green, blue, alpha;
                    long dRed, dGreen, dBlue, dAlpha;
                    long min,max;
                    Matrix *m;

                    mat = *(matrix) * f->matrix;
                    // Compute inverted matrix
                    f->gradient.imat = mat.invert();

                    /* renormalize the matrix */
                    m=&f->gradient.imat;
                    if (f->type == f_LinearGradient) {
                        m->a = m->a * FRAC * (1/128.0) * 65536.0;
                        m->b = m->b * FRAC * (1/128.0) * 65536.0;
                        m->tx = (long) ((m->tx + 16384) * (1/128.0) * 65536.0);
                    } else {
                        m->a = m->a * FRAC * (1/64.0) * 65536.0;
                        m->b = m->b * FRAC * (1/64.0) * 65536.0;
                        m->c = m->c * FRAC * (1/64.0) * 65536.0;
                        m->d = m->d * FRAC * (1/64.0) * 65536.0;
                        m->tx = (long) (m->tx * (1/64.0) * 65536.0);
                        m->ty = (long) (m->ty * (1/64.0) * 65536.0);
                    }

                    // Reset translation in inverted matrix
                    f->gradient.has_alpha = 0;

                    // Build a 256 color ramp
                    f->gradient.ramp = new Color[256];
		    if (f->gradient.ramp == NULL) {
		    	// Invalidate fill style
			f->type = f_None;
			continue;
		    }

                    // Store min and max
                    min = f->gradient.ratio[0];
                    max = f->gradient.ratio[f->gradient.nbGradients-1];
                    for(r=0; r < f->gradient.nbGradients-1; r++)
                    {
                        Color start,end;

                        l = f->gradient.ratio[r+1]-f->gradient.ratio[r];
                        if (l == 0) continue;

                        if (cxform) {
                            start = cxform->getColor(f->gradient.color[r]);
                            end   = cxform->getColor(f->gradient.color[r+1]);
                        } else {
                            start = f->gradient.color[r];
                            end   = f->gradient.color[r+1];
                        }
                        
                        if (start.alpha != ALPHA_OPAQUE || 
                            end.alpha != ALPHA_OPAQUE) {
                            f->gradient.has_alpha = 1;
                        }

                        dRed   = end.red - start.red;
                        dGreen = end.green - start.green;
                        dBlue  = end.blue - start.blue;
                        dAlpha = end.alpha - start.alpha;
                        
                        dRed   = (dRed<<16)/l;
                        dGreen = (dGreen<<16)/l;
                        dBlue  = (dBlue<<16)/l;
                        dAlpha  = (dAlpha<<16)/l;

                        red   = start.red <<16;
                        green = start.green <<16;
                        blue  = start.blue <<16;
                        alpha  = start.alpha <<16;

                        for (n=f->gradient.ratio[r]; n<=f->gradient.ratio[r+1]; n++) {
                            f->gradient.ramp[n].red = red>>16;
                            f->gradient.ramp[n].green = green>>16;
                            f->gradient.ramp[n].blue = blue>>16;
                            f->gradient.ramp[n].alpha = alpha>>16;

                            f->gradient.ramp[n].pixel = gd->allocColor(f->gradient.ramp[n]);
                            red += dRed;
                            green += dGreen;
                            blue += dBlue;
                            alpha += dAlpha;
                        }
                    }
                    for(n=0; n<min; n++) {
                        f->gradient.ramp[n] = f->gradient.ramp[min];
                    }
                    for(n=max; n<256; n++) {
                        f->gradient.ramp[n] = f->gradient.ramp[max];
                    }
                }
                break;
            case f_TiledBitmap:
            case f_clippedBitmap:
                if (f->bitmap) {
                    Matrix *m;

                    f->cmap = gd->getColormap(f->bitmap->colormap, 
                                              f->bitmap->nbColors, cxform);
		    if (f->cmap == NULL) {
			/* Get the normal cmap anyway */
		    	f->cmap = f->bitmap->colormap;
		    }

                    f->bitmap_matrix = *(matrix) * f->matrix;

                    f->bitmap_matrix = f->bitmap_matrix.invert();

                    m=&f->bitmap_matrix;
                    m->a = m->a * FRAC * 65536.0;
                    m->b = m->b * FRAC * 65536.0;
                    m->c = m->c * FRAC * 65536.0;
                    m->d = m->d * FRAC * 65536.0;
                    m->tx = (long) (m->tx * 65536.0);
                    m->ty = (long) (m->ty * 65536.0);

                    f->alpha_table = NULL;

                    if (f->bitmap->alpha_buf && cxform) {
                        unsigned char *alpha_table;
                        int i;

                        alpha_table = (unsigned char *)malloc (256);
                        if (alpha_table != NULL) {
                            for(i=0;i<256;i++) {
                                alpha_table[i] = cxform->getAlpha(i);
                            }
                        }
                        f->alpha_table = alpha_table;
                    }
                }
                break;
        }
    }
}

static void
clearStyles(GraphicDevice *gd, FillStyleDef *ftab, long n)
{
    long fs;
    FillStyleDef *f;

    for(fs = 0; fs < n; fs++)
    {
        f = ftab + fs;
        switch (f->type)
        {
            case f_Solid:
                break;
            case f_LinearGradient:
            case f_RadialGradient:
                if (f->gradient.ramp) {
                    delete f->gradient.ramp;
                }
                break;
            case f_TiledBitmap:
            case f_clippedBitmap:
                if (f->bitmap) {
                    if (f->cmap && f->cmap != f->bitmap->colormap) delete f->cmap;
                    if (f->alpha_table) free(f->alpha_table);
                }
                break;
	    case f_None:
	    	break;
        }
    }
}