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- ////////////////////////////////////////////////////////////
- // Flash Plugin and Player
- // Copyright (C) 1998 Olivier Debon
- //
- // This program is free software; you can redistribute it and/or
- // modify it under the terms of the GNU General Public License
- // as published by the Free Software Foundation; either version 2
- // of the License, or (at your option) any later version.
- //
- // This program is distributed in the hope that it will be useful,
- // but WITHOUT ANY WARRANTY; without even the implied warranty of
- // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- // GNU General Public License for more details.
- //
- // You should have received a copy of the GNU General Public License
- // along with this program; if not, write to the Free Software
- // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- //
- ///////////////////////////////////////////////////////////////
- // Author : Olivier Debon <odebon@club-internet.fr>
- //
-
- #include "swf.h"
-
- #ifdef RCSID
- static char *rcsid = "$Id: graphic.cc,v 1.5 1999/09/03 15:17:40 ode Exp $";
- #endif
-
- #include "sqrt.h"
-
- #define FULL_AA
-
- #define PRINT 0
-
-
- // Public
-
- GraphicDevice::GraphicDevice(FlashDisplay *fd)
- {
- flashDisplay = fd;
-
- bgInitialized = 0;
-
- // Reset flash refresh flag
- flashDisplay->flash_refresh = 0;
-
- bpp = fd->depth;
-
- /* should be the actual window size */
- targetWidth = fd->width;
- targetHeight = fd->height;
- bpl = fd->bpl;
-
- #if PRINT
- printf("Target Width = %d\n", targetWidth);
- printf("Target Height = %d\n", targetHeight);
- #endif
-
- zoom = FRAC;
- movieWidth = targetWidth;
- movieHeight = targetHeight;
-
- viewPort.xmin = 0;
- viewPort.xmax = targetWidth-1;
- viewPort.ymin = 0;
- viewPort.ymax = targetHeight-1;
-
- canvasBuffer = (unsigned char *) fd->pixels;
-
- adjust = new Matrix;
- foregroundColor.red = 0;
- foregroundColor.green = 0;
- foregroundColor.blue = 0;
- foregroundColor.alpha = ALPHA_OPAQUE;
-
- backgroundColor.red = 0;
- backgroundColor.green = 0;
- backgroundColor.blue = 0;
- backgroundColor.alpha = ALPHA_OPAQUE;
-
- showMore = 0;
-
- setClipping(0); // Reset
- setClipping(1);
-
- /* polygon rasterizer : handle memory errors ! */
-
- height = targetHeight;
- segs = (Segment **)malloc(height * sizeof(Segment *));
- memset(segs, 0, height * sizeof(Segment *));
- ymin = height;
- ymax = -1;
-
- seg_pool = (Segment *)malloc(NB_SEGMENT_MAX * sizeof(Segment));
- seg_pool_cur = seg_pool;
- }
-
- GraphicDevice::~GraphicDevice()
- {
- free(segs);
- free(seg_pool);
-
- if (adjust) {
- delete adjust;
- }
- }
-
- ///////////// PLATFORM INDEPENDENT
- Color *
- GraphicDevice::getColormap(Color *old, long n, Cxform *cxform)
- {
- Color *newCmp;
-
- newCmp = new Color[n];
- if (newCmp == NULL) return NULL;
-
- if (cxform) {
- for(long i = 0; i < n; i++)
- {
- newCmp[i] = cxform->getColor(old[i]);
- newCmp[i].pixel = allocColor(newCmp[i]);
- }
- } else {
- for(long i = 0; i < n; i++)
- {
- newCmp[i].pixel = allocColor(old[i]);
- }
- }
-
- return newCmp;
- }
-
- ///////////// PLATFORM INDEPENDENT
- long
- GraphicDevice::getHeight()
- {
- return targetHeight;
- }
-
- ///////////// PLATFORM INDEPENDENT
- long
- GraphicDevice::getWidth()
- {
- return targetWidth;
- }
-
- ///////////// PLATFORM INDEPENDENT
- Color
- GraphicDevice::getForegroundColor()
- {
- return foregroundColor;
- }
-
- void
- GraphicDevice::setForegroundColor(Color color)
- {
- foregroundColor = color;
- }
-
- ///////////// PLATFORM INDEPENDENT
- Color
- GraphicDevice::getBackgroundColor()
- {
- return backgroundColor;
- }
-
- ///////////// PLATFORM INDEPENDENT
- int
- GraphicDevice::setBackgroundColor(Color color)
- {
- if (bgInitialized == 0) {
- backgroundColor = color;
- clearCanvas();
- bgInitialized = 1;
- return 1;
- }
- return 0;
- }
-
- ///////////// PLATFORM INDEPENDENT
- void
- GraphicDevice::setMovieDimension(long width, long height)
- {
- float xAdjust, yAdjust;
-
- movieWidth = width;
- movieHeight = height;
-
- xAdjust = (float)targetWidth*zoom/(float)width;
- yAdjust = (float)targetHeight*zoom/(float)height;
-
- if (xAdjust < yAdjust) {
- adjust->a = xAdjust;
- adjust->d = xAdjust;
- adjust->ty = ((targetHeight*zoom) - (long)(height * xAdjust))/2;
- viewPort.ymin = adjust->ty/zoom;
- viewPort.ymax = targetHeight-viewPort.ymin-1;
- } else {
- adjust->a = yAdjust;
- adjust->d = yAdjust;
- adjust->tx = ((targetWidth*zoom) - (long)(width * yAdjust))/2;
- viewPort.xmin = adjust->tx/zoom;
- viewPort.xmax = targetWidth-viewPort.xmin-1;
- }
-
- if (viewPort.xmin < 0) viewPort.xmin = 0;
- if (viewPort.ymin < 0) viewPort.ymin = 0;
- if (viewPort.xmax >= targetWidth) viewPort.xmax = targetWidth-1;
- if (viewPort.ymax >= targetHeight) viewPort.ymax = targetHeight-1;
- }
-
- ///////////// PLATFORM INDEPENDENT
- void
- GraphicDevice::setMovieZoom(int z)
- {
- z *= FRAC;
- if (z <= 0 || z > 100) return;
- zoom = z;
- setMovieDimension(movieWidth,movieHeight);
- }
-
- ///////////// PLATFORM INDEPENDENT
- void
- GraphicDevice::setMovieOffset(long x, long y)
- {
- adjust->tx = -zoom*x;
- adjust->ty = -zoom*y;
- }
-
- ///////////// PLATFORM INDEPENDENT
- long
- GraphicDevice::clip(long &y, long &start, long &end)
- {
- long xmin,xend;
-
- if (y < clip_rect.ymin ||
- y >= clip_rect.ymax) return 1;
- if (end <= start)
- return 1;
- xmin = clip_rect.xmin * FRAC;
- xend = clip_rect.xmax * FRAC;
-
- if (end <= xmin || start >= xend) return 1;
-
- if (start < xmin) start = xmin;
- if (end > xend) end = xend;
-
- return 0;
- }
-
-
- /* alpha = 0 : select c1, alpha = 255 select c2 */
- unsigned long
- GraphicDevice::mix_alpha(unsigned long c1,
- unsigned long c2, int alpha)
- {
- Color col1;
- Color col2;
- Color col;
-
- col1 = getColor(c1);
- col2 = getColor(c2);
- col.red = ((col2.red - col1.red) * alpha + (col1.red << 8)) >> 8;
- col.green = ((col2.green - col1.green) * alpha + (col1.green << 8)) >> 8;
- col.blue = ((col2.blue - col1.blue) * alpha + (col1.blue << 8)) >> 8;
- return allocColor(col);
- }
-
- void
- GraphicDevice::drawBox(long x1, long y1, long x2, long y2)
- {
- int i;
-
- for(i=0;i<FRAC*2;i++) {
- drawLine(x1+i, y1+i, x2-i, y1+i, 0);
- drawLine(x1+i, y2-i, x2-i, y2-i, 0);
-
- drawLine(x1+i, y1+i+1, x1+i, y2-i-1, 0);
- drawLine(x2-i, y1+i+1, x2-i, y2-i-1, 0);
- }
- }
-
- /************************************************************************/
-
- /* polygon rasteriser */
-
- static inline Segment *allocSeg(GraphicDevice *gd)
- {
- Segment *seg;
-
- if ( (gd->seg_pool_cur - gd->seg_pool) >= NB_SEGMENT_MAX ) {
- seg = NULL;
- } else {
- seg = gd->seg_pool_cur++;
- }
-
- return seg;
- }
-
- /* add a segment to the current path */
- /* XXX: handle reverse here ? */
- /* XXX: should not malloc here */
- /* XXX: handle y1 == y2 case (different for fill / line) */
- void GraphicDevice::addSegment(long x1, long y1, long x2, long y2,
- FillStyleDef *f0,
- FillStyleDef *f1,
- int aa)
- {
- Segment *seg,**segs;
- long dX, X, Y, ymin, ymax, tmp;
- FillStyleDef *ff;
-
- #if 0
- if ( ((y1 + (FRAC-1)) & ~(FRAC-1)) == ((y2 + (FRAC-1)) & ~(FRAC-1)) ) {
- return;
- }
- #else
- if ( y1 == y2 ) {
- return;
- }
- #endif
-
- if (y1 < y2) {
- ymin = y1;
- ymax = y2;
- ff = f0;
- f0 = f1;
- f1 = ff;
- } else {
- ymin = y2;
- ymax = y1;
- tmp = x1;
- x1 = x2;
- x2 = tmp;
- }
-
- if (ymin>>FRAC_BITS > clip_rect.ymax) {
- return;
- }
-
- X = x1 << SEGFRAC;
- dX = ((x2 - x1)<<SEGFRAC)/(ymax-ymin);
-
- if (ymin < 0) {
- X += dX * (-ymin);
- ymin = 0;
- }
-
- Y = (ymin + (FRAC-1)) & ~(FRAC-1);
- if (Y > ymax) {
- //printf("Elimine @ y = %d ymin = %d, ymax = %d\n", Y, ymin, seg->ymax);
- return;
- }
- X += dX * (Y-ymin);
-
- Y >>= FRAC_BITS;
- if (Y >= clip_rect.ymax) {
- return;
- }
-
- seg = allocSeg(this);
- if (seg == NULL) {
- // printf("addSegment: too many segments\n");
- return;
- }
-
- seg->next = 0;
- seg->nextValid = 0;
- seg->aa = aa;
- seg->ymax = ymax;
- seg->x1 = x1;
- seg->x2 = x2;
- seg->X = X;
- seg->dX = dX;
- seg->fs[0] = f0;
- seg->fs[1] = f1;
-
- if (Y < this->ymin) this->ymin = Y;
- ymax = (seg->ymax + FRAC - 1) >> FRAC_BITS;
- if (ymax >= this->height) ymax = this->height-1;
- if (ymax > this->ymax) this->ymax = ymax;
-
- segs = this->segs;
-
- if (segs[Y] == 0) {
- segs[Y] = seg;
- } else {
- Segment *s,*prev;
-
- prev = 0;
- for(s = segs[Y]; s; prev = s, s = s->next) {
- if (s->X > seg->X) {
- if (prev) {
- prev->next = seg;
- seg->next = s;
- } else {
- seg->next = segs[Y];
- segs[Y] = seg;
- }
- break;
- }
- }
- if (s == 0) {
- prev->next = seg;
- seg->next = s;
- }
- }
- }
-
- static Segment *progressSegments(Segment * curSegs, long y)
- {
- Segment *seg,*prev;
-
- // Update current segments
- seg = curSegs;
- prev = 0;
- while(seg)
- {
- if ((y*FRAC) > seg->ymax) {
- // Remove this segment, no more valid
- if (prev) {
- prev->nextValid = seg->nextValid;
- } else {
- curSegs = seg->nextValid;
- }
- seg = seg->nextValid;
- } else {
- seg->X += seg->dX * FRAC;
- #if 0
- if (prev && prev->X > seg->X) {
- s = &curSegs;
- while ((*s)->X < seg->X) s=&(*s)->nextValid;
- prev->nextValid = seg->nextValid;
- seg->nextValid = *s;
- *s = seg;
- seg = prev->nextValid;
- } else
- #endif
- {
- prev = seg;
- seg = seg->nextValid;
- }
- }
- }
- return curSegs;
- }
-
- static Segment *newSegments(Segment *curSegs, Segment *newSegs)
- {
- Segment *s,*seg,*prev;
-
- s = curSegs;
- prev = 0;
-
- // Check for new segments
- for (seg = newSegs; seg; seg=seg->next)
- {
- // Place it at the correct position according to X
- if (curSegs == 0) {
- curSegs = seg;
- seg->nextValid = 0;
- } else {
- for(; s; prev = s, s = s->nextValid)
- {
- if ( s->X > seg->X ||
- ( (s->X == seg->X) &&
- ( (seg->x1 == s->x1 && seg->dX < s->dX) ||
- (seg->x2 == s->x2 && seg->dX > s->dX)
- ))) {
- // Insert before s
- if (prev) {
- seg->nextValid = s;
- prev->nextValid = seg;
- } else {
- seg->nextValid = curSegs;
- curSegs = seg;
- }
- break;
- }
- }
- // Append at the end
- if (s == 0) {
- prev->nextValid = seg;
- seg->nextValid = 0;
- }
- }
-
- s = seg;
- }
-
- return curSegs;
- }
-
- #if 0
- static void
- printSeg(Segment *seg)
- {
- /*
- printf("Seg %08x : X = %5d, Ft = %d, Cl = %2x/%2x/%2x, Cr = %2x/%2x/%2x, x1=%5d, x2=%5d, ymin=%5d, ymax=%5d\n", seg,
- seg->X>>SEGFRAC,
- seg->right ? seg->right->type: -1,
- seg->left ? seg->left->color.red : -1,
- seg->left ? seg->left->color.green : -1,
- seg->left ? seg->left->color.blue : -1,
- seg->right ? seg->right->color.red : -1,
- seg->right ? seg->right->color.green : -1,
- seg->right ? seg->right->color.blue : -1,
- seg->x1, seg->x2, seg->ymin, seg->ymax);
- */
- }
- #endif
-
- static void
- renderScanLine(GraphicDevice *gd, long y, Segment *curSegs)
- {
- Segment *seg;
- long width;
- int fi = 1;
- FillStyleDef *f;
-
- width = gd->getWidth() * FRAC;
-
- if (curSegs && curSegs->fs[0] && curSegs->fs[1] == 0) {
- fi = 0;
- }
- for(seg = curSegs; seg && seg->nextValid; seg = seg->nextValid)
- {
- if (seg->nextValid->X <0) continue;
- if ((seg->X>>SEGFRAC) > width) break;
- #if 0
- if (seg->X > seg->nextValid->X) {
- printf("error %d %d\n",seg->X,seg->nextValid->X);
- }
- #endif
- f = seg->fs[fi];
- if (f) {
- switch (f->type) {
- case f_Solid:
- if (seg->aa) {
- gd->fillLineAA(f, y, seg->X>>SEGFRAC, seg->nextValid->X>>SEGFRAC);
- } else {
- gd->fillLine(f, y, seg->X>>SEGFRAC, seg->nextValid->X>>SEGFRAC);
- }
- break;
- case f_TiledBitmap:
- case f_clippedBitmap:
- gd->fillLineBitmap(f, y, seg->X>>SEGFRAC, seg->nextValid->X>>SEGFRAC);
- break;
- case f_LinearGradient:
- gd->fillLineLG(&f->gradient, y, seg->X>>SEGFRAC, seg->nextValid->X>>SEGFRAC);
- break;
- case f_RadialGradient:
- gd->fillLineRG(&f->gradient, y, seg->X>>SEGFRAC, seg->nextValid->X>>SEGFRAC);
- break;
- case f_None:
- break;
- }
- }
- }
- }
-
-
- /* draw the current path */
- void GraphicDevice::drawPolygon(void)
- {
- long y;
- Segment *curSegs,*seg;
-
- // no segments ?
- if (this->ymax == -1)
- return;
-
- // Foreach scanline
- curSegs = 0;
-
- for(y=this->ymin; y <= this->ymax; y++) {
-
- // Make X values progess and remove unuseful segments
- curSegs = progressSegments(curSegs, y);
-
- // Add the new segment starting at the y position.
- curSegs = newSegments(curSegs, this->segs[y]);
-
- // Render the scanline
- if (this->scan_line_func == NULL) {
- renderScanLine(this, y, curSegs);
- } else {
- for(seg = curSegs; seg && seg->nextValid; seg = seg->nextValid) {
- if (seg->nextValid->X >= seg->X) {
- this->scan_line_func(this->scan_line_func_id,
- y, seg->X>>SEGFRAC, seg->nextValid->X>>SEGFRAC);
- }
- }
- }
- }
-
- /* free the segments */
- memset(this->segs + this->ymin, 0,
- (this->ymax - this->ymin + 1) * sizeof(Segment *));
-
- this->ymax = -1;
- this->ymin = this->height;
-
- this->seg_pool_cur = this->seg_pool;
- }
-
- void
- GraphicDevice::updateClippingRegion(Rect *rect)
- {
- if (!clipping) return;
-
- transformBoundingBox(&clip_rect, adjust, rect, 1);
- clip_rect.xmin >>= FRAC_BITS;
- clip_rect.xmax >>= FRAC_BITS;
- clip_rect.ymin >>= FRAC_BITS;
- clip_rect.ymax >>= FRAC_BITS;
-
- #if PRINT&1
- clip_rect.print();
- #endif
-
- clip_rect.xmin-=2;
- clip_rect.ymin-=2;
- clip_rect.xmax+=2;
- clip_rect.ymax+=2;
-
- if (clip_rect.xmin < viewPort.xmin) clip_rect.xmin = viewPort.xmin;
- if (clip_rect.xmax < viewPort.xmin) clip_rect.xmax = viewPort.xmin;
- if (clip_rect.ymin < viewPort.ymin) clip_rect.ymin = viewPort.ymin;
- if (clip_rect.ymax < viewPort.ymin) clip_rect.ymax = viewPort.ymin;
-
- if (clip_rect.xmax > viewPort.xmax) clip_rect.xmax = viewPort.xmax;
- if (clip_rect.ymax > viewPort.ymax) clip_rect.ymax = viewPort.ymax;
- if (clip_rect.xmin > viewPort.xmax) clip_rect.xmin = viewPort.xmax;
- if (clip_rect.ymin > viewPort.ymax) clip_rect.ymin = viewPort.ymax;
- }
-
- void
- GraphicDevice::setClipping(int value)
- {
- clipping = value;
- if (clipping == 0) {
- //printf("Clipping Off\n");
- // Reset region
- clip_rect.xmin = viewPort.xmin;
- clip_rect.xmax = viewPort.xmax;
- clip_rect.ymin = viewPort.ymin;
- clip_rect.ymax = viewPort.ymax;
- }
- }
-