<URL: http://bugs.freeciv.org/Ticket/Display.html?id=29557 >
> [cproc - Mi 20. Dez 2006, 12:01:14]:
>
> > [dmarks - Mi 20. Dez 2006, 01:18:32]:
> >
> > On 12/20/06, Christian Prochaska <[EMAIL PROTECTED]>
> > wrote:
> > >
> > > So it seems there is a problem with antialiased zooming. Does the
> > > attached patch make the other missing images visible?
> > >
> >
> > It does, yes. Am I missing some component in my SDL installation?
>
> No, the zoom code is part of the SDL client and as it seems Rafal put a
> lot of effort into optimizing it for speed, but apparently at the cost
> of portability. I'll try to add the hopefully more portable zoom
> function from SDL_gfx as an alternative for platforms where the
> optimized version doesn't work.
>
Does it work with the attached patch? It adds two new source files, so
you need to rerun autogen.sh before compiling.
Index: client/gui-sdl/gui_zoom.c
===================================================================
--- client/gui-sdl/gui_zoom.c (Revision 12506)
+++ client/gui-sdl/gui_zoom.c (Arbeitskopie)
@@ -56,6 +56,8 @@
#include <SDL/SDL.h>
+#include "SDL_rotozoom.h"
+
/* gui-sdl */
#include "graphics.h"
@@ -2246,6 +2248,7 @@
#define VALUE_LIMIT 0.001
+#ifndef __MACOS__
/**************************************************************************
zoomSurfaceSize( ... )
Calculate new width and height from the scaling factors
@@ -2270,6 +2273,7 @@
*pNew_width = MAX(*pNew_width, 1);
*pNew_height = MAX(*pNew_height, 1);
}
+#endif
/* ============================================================== */
/* ======================= Public Functions ===================== */
@@ -2293,11 +2297,17 @@
SDL_Surface *ZoomSurface(const SDL_Surface * pSrc, double zoomx,
double zoomy, int smooth)
{
+#ifdef __MACOS__
+ /* use SDL_gfx's more portable zoom function on MacOS to avoid crash */
+ return zoomSurface((SDL_Surface*)pSrc, zoomx, zoomy, smooth);
+#else
int dstwidth, dstheight;
+
/* Get size if target */
ZoomSurfaceSize(pSrc->w, pSrc->h, zoomx, zoomy, &dstwidth, &dstheight);
return ResizeSurface(pSrc, (Uint16) dstwidth, (Uint16) dstheight,
smooth);
+#endif
}
/**************************************************************************
@@ -2326,6 +2336,13 @@
return NULL;
}
+#ifdef __MACOS__
+ /* use SDL_gfx's more portable zoom function on MacOS to avoid crash */
+ double zoomx = (double)new_width / pSrc->w;
+ double zoomy = (double)new_height / pSrc->h;
+ return zoomSurface((SDL_Surface*)pSrc, zoomx, zoomy, smooth);
+#endif
+
/*
* Alloc space to completely contain the zoomed surface
*/
Index: client/gui-sdl/SDL_rotozoom.c
===================================================================
--- client/gui-sdl/SDL_rotozoom.c (Revision 0)
+++ client/gui-sdl/SDL_rotozoom.c (Revision 0)
@@ -0,0 +1,972 @@
+/*
+
+ SDL_rotozoom.c - rotozoomer for 32bit or 8bit surfaces
+
+ LGPL (c) A. Schiffler
+
+*/
+
+#ifdef WIN32
+#include <windows.h>
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "SDL_rotozoom.h"
+
+#define MAX(a,b) (((a) > (b)) ? (a) : (b))
+
+/*
+
+ 32bit Zoomer with optional anti-aliasing by bilinear interpolation.
+
+ Zoomes 32bit RGBA/ABGR 'src' surface to 'dst' surface.
+
+*/
+
+static int zoomSurfaceRGBA(SDL_Surface * src, SDL_Surface * dst, int flipx, int flipy, int smooth)
+{
+ int x, y, sx, sy, *sax, *say, *csax, *csay, csx, csy, ex, ey, t1, t2, sstep;
+ tColorRGBA *c00, *c01, *c10, *c11;
+ tColorRGBA *sp, *csp, *dp;
+ int dgap;
+
+ /*
+ * Variable setup
+ */
+ if (smooth) {
+ /*
+ * For interpolation: assume source dimension is one pixel
+ */
+ /*
+ * smaller to avoid overflow on right and bottom edge.
+ */
+ sx = (int) (65536.0 * (float) (src->w - 1) / (float) dst->w);
+ sy = (int) (65536.0 * (float) (src->h - 1) / (float) dst->h);
+ } else {
+ sx = (int) (65536.0 * (float) src->w / (float) dst->w);
+ sy = (int) (65536.0 * (float) src->h / (float) dst->h);
+ }
+
+ /*
+ * Allocate memory for row increments
+ */
+ if ((sax = (int *) malloc((dst->w + 1) * sizeof(Uint32))) == NULL) {
+ return (-1);
+ }
+ if ((say = (int *) malloc((dst->h + 1) * sizeof(Uint32))) == NULL) {
+ free(sax);
+ return (-1);
+ }
+
+ /*
+ * Precalculate row increments
+ */
+ sp = csp = (tColorRGBA *) src->pixels;
+ dp = (tColorRGBA *) dst->pixels;
+
+ if (flipx) csp += (src->w-1);
+ if (flipy) csp = (tColorRGBA*)( (Uint8*)csp + src->pitch*(src->h-1) );
+
+ csx = 0;
+ csax = sax;
+ for (x = 0; x <= dst->w; x++) {
+ *csax = csx;
+ csax++;
+ csx &= 0xffff;
+ csx += sx;
+ }
+ csy = 0;
+ csay = say;
+ for (y = 0; y <= dst->h; y++) {
+ *csay = csy;
+ csay++;
+ csy &= 0xffff;
+ csy += sy;
+ }
+
+ dgap = dst->pitch - dst->w * 4;
+
+ /*
+ * Switch between interpolating and non-interpolating code
+ */
+ if (smooth) {
+
+ /*
+ * Interpolating Zoom
+ */
+
+ /*
+ * Scan destination
+ */
+ csay = say;
+ for (y = 0; y < dst->h; y++) {
+ /*
+ * Setup color source pointers
+ */
+ c00 = csp;
+ c01 = csp;
+ c01++;
+ c10 = (tColorRGBA *) ((Uint8 *) csp + src->pitch);
+ c11 = c10;
+ c11++;
+ csax = sax;
+ for (x = 0; x < dst->w; x++) {
+
+ /*
+ * Interpolate colors
+ */
+ ex = (*csax & 0xffff);
+ ey = (*csay & 0xffff);
+ t1 = ((((c01->r - c00->r) * ex) >> 16) + c00->r) & 0xff;
+ t2 = ((((c11->r - c10->r) * ex) >> 16) + c10->r) & 0xff;
+ dp->r = (((t2 - t1) * ey) >> 16) + t1;
+ t1 = ((((c01->g - c00->g) * ex) >> 16) + c00->g) & 0xff;
+ t2 = ((((c11->g - c10->g) * ex) >> 16) + c10->g) & 0xff;
+ dp->g = (((t2 - t1) * ey) >> 16) + t1;
+ t1 = ((((c01->b - c00->b) * ex) >> 16) + c00->b) & 0xff;
+ t2 = ((((c11->b - c10->b) * ex) >> 16) + c10->b) & 0xff;
+ dp->b = (((t2 - t1) * ey) >> 16) + t1;
+ t1 = ((((c01->a - c00->a) * ex) >> 16) + c00->a) & 0xff;
+ t2 = ((((c11->a - c10->a) * ex) >> 16) + c10->a) & 0xff;
+ dp->a = (((t2 - t1) * ey) >> 16) + t1;
+
+ /*
+ * Advance source pointers
+ */
+ csax++;
+ sstep = (*csax >> 16);
+ c00 += sstep;
+ c01 += sstep;
+ c10 += sstep;
+ c11 += sstep;
+ /*
+ * Advance destination pointer
+ */
+ dp++;
+ }
+ /*
+ * Advance source pointer
+ */
+ csay++;
+ csp = (tColorRGBA *) ((Uint8 *) csp + (*csay >> 16) * src->pitch);
+ /*
+ * Advance destination pointers
+ */
+ dp = (tColorRGBA *) ((Uint8 *) dp + dgap);
+ }
+
+ } else {
+
+ /*
+ * Non-Interpolating Zoom
+ */
+
+ csay = say;
+ for (y = 0; y < dst->h; y++) {
+ sp = csp;
+ csax = sax;
+ for (x = 0; x < dst->w; x++) {
+ /*
+ * Draw
+ */
+ *dp = *sp;
+ /*
+ * Advance source pointers
+ */
+ csax++;
+ sstep = (*csax >> 16);
+ if (flipx) sstep = -sstep;
+ sp += sstep;
+ /*
+ * Advance destination pointer
+ */
+ dp++;
+ }
+ /*
+ * Advance source pointer
+ */
+ csay++;
+ sstep = (*csay >> 16) * src->pitch;
+ if (flipy) sstep = -sstep;
+ csp = (tColorRGBA *) ((Uint8 *) csp + sstep);
+
+ /*
+ * Advance destination pointers
+ */
+ dp = (tColorRGBA *) ((Uint8 *) dp + dgap);
+ }
+
+ }
+
+ /*
+ * Remove temp arrays
+ */
+ free(sax);
+ free(say);
+
+ return (0);
+}
+
+/*
+
+ 8bit Zoomer without smoothing.
+
+ Zoomes 8bit palette/Y 'src' surface to 'dst' surface.
+
+*/
+
+static int zoomSurfaceY(SDL_Surface * src, SDL_Surface * dst, int flipx, int flipy)
+{
+ Uint32 x, y, sx, sy, *sax, *say, *csax, *csay, csx, csy;
+ Uint8 *sp, *dp, *csp;
+ int dgap;
+
+ /*
+ * Variable setup
+ */
+ sx = (Uint32) (65536.0 * (float) src->w / (float) dst->w);
+ sy = (Uint32) (65536.0 * (float) src->h / (float) dst->h);
+
+ /*
+ * Allocate memory for row increments
+ */
+ if ((sax = (Uint32 *) malloc(dst->w * sizeof(Uint32))) == NULL) {
+ return (-1);
+ }
+ if ((say = (Uint32 *) malloc(dst->h * sizeof(Uint32))) == NULL) {
+ if (sax != NULL) {
+ free(sax);
+ }
+ return (-1);
+ }
+
+ /*
+ * Precalculate row increments
+ */
+ csx = 0;
+ csax = sax;
+ for (x = 0; x < dst->w; x++) {
+ csx += sx;
+ *csax = (csx >> 16);
+ csx &= 0xffff;
+ csax++;
+ }
+ csy = 0;
+ csay = say;
+ for (y = 0; y < dst->h; y++) {
+ csy += sy;
+ *csay = (csy >> 16);
+ csy &= 0xffff;
+ csay++;
+ }
+
+ csx = 0;
+ csax = sax;
+ for (x = 0; x < dst->w; x++) {
+ csx += (*csax);
+ csax++;
+ }
+ csy = 0;
+ csay = say;
+ for (y = 0; y < dst->h; y++) {
+ csy += (*csay);
+ csay++;
+ }
+
+ /*
+ * Pointer setup
+ */
+ sp = csp = (Uint8 *) src->pixels;
+ dp = (Uint8 *) dst->pixels;
+ dgap = dst->pitch - dst->w;
+
+ /*
+ * Draw
+ */
+ csay = say;
+ for (y = 0; y < dst->h; y++) {
+ csax = sax;
+ sp = csp;
+ for (x = 0; x < dst->w; x++) {
+ /*
+ * Draw
+ */
+ *dp = *sp;
+ /*
+ * Advance source pointers
+ */
+ sp += (*csax);
+ csax++;
+ /*
+ * Advance destination pointer
+ */
+ dp++;
+ }
+ /*
+ * Advance source pointer (for row)
+ */
+ csp += ((*csay) * src->pitch);
+ csay++;
+ /*
+ * Advance destination pointers
+ */
+ dp += dgap;
+ }
+
+ /*
+ * Remove temp arrays
+ */
+ free(sax);
+ free(say);
+
+ return (0);
+}
+
+/*
+
+ 32bit Rotozoomer with optional anti-aliasing by bilinear interpolation.
+
+ Rotates and zoomes 32bit RGBA/ABGR 'src' surface to 'dst' surface.
+
+*/
+
+static void transformSurfaceRGBA(SDL_Surface * src, SDL_Surface * dst, int cx, int cy, int isin, int icos, int flipx, int flipy, int smooth)
+{
+ int x, y, t1, t2, dx, dy, xd, yd, sdx, sdy, ax, ay, ex, ey, sw, sh;
+ tColorRGBA c00 = {0}, c01 = {0}, c10 = {0}, c11 = {0};
+ tColorRGBA *pc, *sp;
+ int gap;
+
+ /*
+ * Variable setup
+ */
+ xd = ((src->w - dst->w) << 15);
+ yd = ((src->h - dst->h) << 15);
+ ax = (cx << 16) - (icos * cx);
+ ay = (cy << 16) - (isin * cx);
+ sw = src->w - 1;
+ sh = src->h - 1;
+ pc = dst->pixels;
+ gap = dst->pitch - dst->w * 4;
+
+ /*
+ * Switch between interpolating and non-interpolating code
+ */
+ if (smooth) {
+ for (y = 0; y < dst->h; y++) {
+ dy = cy - y;
+ sdx = (ax + (isin * dy)) + xd;
+ sdy = (ay - (icos * dy)) + yd;
+ for (x = 0; x < dst->w; x++) {
+ dx = (sdx >> 16);
+ dy = (sdy >> 16);
+ if ((dx >= -1) && (dy >= -1) && (dx < src->w) && (dy < src->h)) {
+ if ((dx >= 0) && (dy >= 0) && (dx < sw) && (dy < sh)) {
+ sp = (tColorRGBA *) ((Uint8 *) src->pixels + src->pitch * dy);
+ sp += dx;
+ c00 = *sp;
+ sp += 1;
+ c01 = *sp;
+ sp = (tColorRGBA *) ((Uint8 *) sp + src->pitch);
+ sp -= 1;
+ c10 = *sp;
+ sp += 1;
+ c11 = *sp;
+ } else if ((dx == sw) && (dy == sh)) {
+ sp = (tColorRGBA *) ((Uint8 *) src->pixels + src->pitch * dy);
+ sp += dx;
+ c00 = *sp;
+ c01 = *sp;
+ c10 = *sp;
+ c11 = *sp;
+ } else if ((dx == -1) && (dy == -1)) {
+ sp = (tColorRGBA *) (src->pixels);
+ c00 = *sp;
+ c01 = *sp;
+ c10 = *sp;
+ c11 = *sp;
+ } else if ((dx == -1) && (dy == sh)) {
+ sp = (tColorRGBA *) (src->pixels);
+ sp = (tColorRGBA *) ((Uint8 *) src->pixels + src->pitch * dy);
+ c00 = *sp;
+ c01 = *sp;
+ c10 = *sp;
+ c11 = *sp;
+ } else if ((dx == sw) && (dy == -1)) {
+ sp = (tColorRGBA *) (src->pixels);
+ sp += dx;
+ c00 = *sp;
+ c01 = *sp;
+ c10 = *sp;
+ c11 = *sp;
+ } else if (dx == -1) {
+ sp = (tColorRGBA *) ((Uint8 *) src->pixels + src->pitch * dy);
+ c00 = *sp;
+ c01 = *sp;
+ c10 = *sp;
+ sp = (tColorRGBA *) ((Uint8 *) sp + src->pitch);
+ c11 = *sp;
+ } else if (dy == -1) {
+ sp = (tColorRGBA *) (src->pixels);
+ sp += dx;
+ c00 = *sp;
+ c01 = *sp;
+ c10 = *sp;
+ sp += 1;
+ c11 = *sp;
+ } else if (dx == sw) {
+ sp = (tColorRGBA *) ((Uint8 *) src->pixels + src->pitch * dy);
+ sp += dx;
+ c00 = *sp;
+ c01 = *sp;
+ sp = (tColorRGBA *) ((Uint8 *) sp + src->pitch);
+ c10 = *sp;
+ c11 = *sp;
+ } else if (dy == sh) {
+ sp = (tColorRGBA *) ((Uint8 *) src->pixels + src->pitch * dy);
+ sp += dx;
+ c00 = *sp;
+ sp += 1;
+ c01 = *sp;
+ c10 = *sp;
+ c11 = *sp;
+ }
+ /*
+ * Interpolate colors
+ */
+ ex = (sdx & 0xffff);
+ ey = (sdy & 0xffff);
+ t1 = ((((c01.r - c00.r) * ex) >> 16) + c00.r) & 0xff;
+ t2 = ((((c11.r - c10.r) * ex) >> 16) + c10.r) & 0xff;
+ pc->r = (((t2 - t1) * ey) >> 16) + t1;
+ t1 = ((((c01.g - c00.g) * ex) >> 16) + c00.g) & 0xff;
+ t2 = ((((c11.g - c10.g) * ex) >> 16) + c10.g) & 0xff;
+ pc->g = (((t2 - t1) * ey) >> 16) + t1;
+ t1 = ((((c01.b - c00.b) * ex) >> 16) + c00.b) & 0xff;
+ t2 = ((((c11.b - c10.b) * ex) >> 16) + c10.b) & 0xff;
+ pc->b = (((t2 - t1) * ey) >> 16) + t1;
+ t1 = ((((c01.a - c00.a) * ex) >> 16) + c00.a) & 0xff;
+ t2 = ((((c11.a - c10.a) * ex) >> 16) + c10.a) & 0xff;
+ pc->a = (((t2 - t1) * ey) >> 16) + t1;
+ }
+ sdx += icos;
+ sdy += isin;
+ pc++;
+ }
+ pc = (tColorRGBA *) ((Uint8 *) pc + gap);
+ }
+ } else {
+ for (y = 0; y < dst->h; y++) {
+ dy = cy - y;
+ sdx = (ax + (isin * dy)) + xd;
+ sdy = (ay - (icos * dy)) + yd;
+ for (x = 0; x < dst->w; x++) {
+ dx = (short) (sdx >> 16);
+ dy = (short) (sdy >> 16);
+ if (flipx) dx = (src->w-1)-dx;
+ if (flipy) dy = (src->h-1)-dy;
+ if ((dx >= 0) && (dy >= 0) && (dx < src->w) && (dy < src->h)) {
+ sp = (tColorRGBA *) ((Uint8 *) src->pixels + src->pitch * dy);
+ sp += dx;
+ *pc = *sp;
+ }
+ sdx += icos;
+ sdy += isin;
+ pc++;
+ }
+ pc = (tColorRGBA *) ((Uint8 *) pc + gap);
+ }
+ }
+}
+
+/*
+
+ 8bit Rotozoomer without smoothing
+
+ Rotates and zoomes 8bit palette/Y 'src' surface to 'dst' surface.
+
+*/
+
+static void transformSurfaceY(SDL_Surface * src, SDL_Surface * dst, int cx, int cy, int isin, int icos)
+{
+ int x, y, dx, dy, xd, yd, sdx, sdy, ax, ay, sw, sh;
+ tColorY *pc, *sp;
+ int gap;
+
+ /*
+ * Variable setup
+ */
+ xd = ((src->w - dst->w) << 15);
+ yd = ((src->h - dst->h) << 15);
+ ax = (cx << 16) - (icos * cx);
+ ay = (cy << 16) - (isin * cx);
+ sw = src->w - 1;
+ sh = src->h - 1;
+ pc = dst->pixels;
+ gap = dst->pitch - dst->w;
+ /*
+ * Clear surface to colorkey
+ */
+ memset(pc, (unsigned char) (src->format->colorkey & 0xff), dst->pitch * dst->h);
+ /*
+ * Iterate through destination surface
+ */
+ for (y = 0; y < dst->h; y++) {
+ dy = cy - y;
+ sdx = (ax + (isin * dy)) + xd;
+ sdy = (ay - (icos * dy)) + yd;
+ for (x = 0; x < dst->w; x++) {
+ dx = (short) (sdx >> 16);
+ dy = (short) (sdy >> 16);
+ if ((dx >= 0) && (dy >= 0) && (dx < src->w) && (dy < src->h)) {
+ sp = (tColorY *) (src->pixels);
+ sp += (src->pitch * dy + dx);
+ *pc = *sp;
+ }
+ sdx += icos;
+ sdy += isin;
+ pc++;
+ }
+ pc += gap;
+ }
+}
+
+/*
+
+ rotozoomSurface()
+
+ Rotates and zoomes a 32bit or 8bit 'src' surface to newly created 'dst' surface.
+ 'angle' is the rotation in degrees. 'zoom' a scaling factor. If 'smooth' is 1
+ then the destination 32bit surface is anti-aliased. If the surface is not 8bit
+ or 32bit RGBA/ABGR it will be converted into a 32bit RGBA format on the fly.
+
+*/
+
+#define VALUE_LIMIT 0.001
+
+
+/* Local rotozoom-size function with trig result return */
+
+static void rotozoomSurfaceSizeTrig(int width, int height, double angle, double zoomx, double zoomy, int *dstwidth, int *dstheight,
+ double *canglezoom, double *sanglezoom)
+{
+ double x, y, cx, cy, sx, sy;
+ double radangle;
+ int dstwidthhalf, dstheighthalf;
+
+ /*
+ * Determine destination width and height by rotating a centered source box
+ */
+ radangle = angle * (M_PI / 180.0);
+ *sanglezoom = sin(radangle);
+ *canglezoom = cos(radangle);
+ *sanglezoom *= zoomx;
+ *canglezoom *= zoomx;
+ x = width / 2;
+ y = height / 2;
+ cx = *canglezoom * x;
+ cy = *canglezoom * y;
+ sx = *sanglezoom * x;
+ sy = *sanglezoom * y;
+ dstwidthhalf = MAX((int)
+ ceil(MAX(MAX(MAX(fabs(cx + sy), fabs(cx - sy)), fabs(-cx + sy)), fabs(-cx - sy))), 1);
+ dstheighthalf = MAX((int)
+ ceil(MAX(MAX(MAX(fabs(sx + cy), fabs(sx - cy)), fabs(-sx + cy)), fabs(-sx - cy))), 1);
+ *dstwidth = 2 * dstwidthhalf;
+ *dstheight = 2 * dstheighthalf;
+}
+
+
+/* Publically available rotozoom-size function */
+
+void rotozoomSurfaceSizeXY(int width, int height, double angle, double zoomx, double zoomy, int *dstwidth, int *dstheight)
+{
+ double dummy_sanglezoom, dummy_canglezoom;
+
+ rotozoomSurfaceSizeTrig(width, height, angle, zoomx, zoomy, dstwidth, dstheight, &dummy_sanglezoom, &dummy_canglezoom);
+}
+
+/* Publically available rotozoom-size function */
+
+void rotozoomSurfaceSize(int width, int height, double angle, double zoom, int *dstwidth, int *dstheight)
+{
+ double dummy_sanglezoom, dummy_canglezoom;
+
+ rotozoomSurfaceSizeTrig(width, height, angle, zoom, zoom, dstwidth, dstheight, &dummy_sanglezoom, &dummy_canglezoom);
+}
+
+/* Publically available rotozoom function */
+
+SDL_Surface *rotozoomSurface(SDL_Surface * src, double angle, double zoom, int smooth)
+{
+ return rotozoomSurfaceXY(src, angle, zoom, zoom, smooth);
+}
+
+/* Publically available rotozoom function */
+
+SDL_Surface *rotozoomSurfaceXY(SDL_Surface * src, double angle, double zoomx, double zoomy, int smooth)
+{
+ SDL_Surface *rz_src;
+ SDL_Surface *rz_dst;
+ double zoominv;
+ double sanglezoom, canglezoom, sanglezoominv, canglezoominv;
+ int dstwidthhalf, dstwidth, dstheighthalf, dstheight;
+ int is32bit;
+ int i, src_converted;
+ int flipx,flipy;
+
+ /*
+ * Sanity check
+ */
+ if (src == NULL)
+ return (NULL);
+
+ /*
+ * Determine if source surface is 32bit or 8bit
+ */
+ is32bit = (src->format->BitsPerPixel == 32);
+ if ((is32bit) || (src->format->BitsPerPixel == 8)) {
+ /*
+ * Use source surface 'as is'
+ */
+ rz_src = src;
+ src_converted = 0;
+ } else {
+ /*
+ * New source surface is 32bit with a defined RGBA ordering
+ */
+ rz_src =
+ SDL_CreateRGBSurface(SDL_SWSURFACE, src->w, src->h, 32, 0x000000ff, 0x0000ff00, 0x00ff0000, 0xff000000);
+ SDL_BlitSurface(src, NULL, rz_src, NULL);
+ src_converted = 1;
+ is32bit = 1;
+ }
+
+ /*
+ * Sanity check zoom factor
+ */
+ flipx = (zoomx<0);
+ if (flipx) zoomx=-zoomx;
+ flipy = (zoomy<0);
+ if (flipy) zoomy=-zoomy;
+ if (zoomx < VALUE_LIMIT) zoomx = VALUE_LIMIT;
+ if (zoomy < VALUE_LIMIT) zoomy = VALUE_LIMIT;
+ zoominv = 65536.0 / (zoomx * zoomx);
+
+ /*
+ * Check if we have a rotozoom or just a zoom
+ */
+ if (fabs(angle) > VALUE_LIMIT) {
+
+ /*
+ * Angle!=0: full rotozoom
+ */
+ /*
+ * -----------------------
+ */
+
+ /* Determine target size */
+ rotozoomSurfaceSizeTrig(rz_src->w, rz_src->h, angle, zoomx, zoomy, &dstwidth, &dstheight, &canglezoom, &sanglezoom);
+
+ /*
+ * Calculate target factors from sin/cos and zoom
+ */
+ sanglezoominv = sanglezoom;
+ canglezoominv = canglezoom;
+ sanglezoominv *= zoominv;
+ canglezoominv *= zoominv;
+
+ /* Calculate half size */
+ dstwidthhalf = dstwidth / 2;
+ dstheighthalf = dstheight / 2;
+
+ /*
+ * Alloc space to completely contain the rotated surface
+ */
+ rz_dst = NULL;
+ if (is32bit) {
+ /*
+ * Target surface is 32bit with source RGBA/ABGR ordering
+ */
+ rz_dst =
+ SDL_CreateRGBSurface(SDL_SWSURFACE, dstwidth, dstheight, 32,
+ rz_src->format->Rmask, rz_src->format->Gmask,
+ rz_src->format->Bmask, rz_src->format->Amask);
+ } else {
+ /*
+ * Target surface is 8bit
+ */
+ rz_dst = SDL_CreateRGBSurface(SDL_SWSURFACE, dstwidth, dstheight, 8, 0, 0, 0, 0);
+ }
+
+ /*
+ * Lock source surface
+ */
+ SDL_LockSurface(rz_src);
+ /*
+ * Check which kind of surface we have
+ */
+ if (is32bit) {
+ /*
+ * Call the 32bit transformation routine to do the rotation (using alpha)
+ */
+ transformSurfaceRGBA(rz_src, rz_dst, dstwidthhalf, dstheighthalf,
+ (int) (sanglezoominv), (int) (canglezoominv),
+ flipx, flipy,
+ smooth);
+ /*
+ * Turn on source-alpha support
+ */
+ SDL_SetAlpha(rz_dst, SDL_SRCALPHA, 255);
+ } else {
+ /*
+ * Copy palette and colorkey info
+ */
+ for (i = 0; i < rz_src->format->palette->ncolors; i++) {
+ rz_dst->format->palette->colors[i] = rz_src->format->palette->colors[i];
+ }
+ rz_dst->format->palette->ncolors = rz_src->format->palette->ncolors;
+ /*
+ * Call the 8bit transformation routine to do the rotation
+ */
+ transformSurfaceY(rz_src, rz_dst, dstwidthhalf, dstheighthalf,
+ (int) (sanglezoominv), (int) (canglezoominv));
+ SDL_SetColorKey(rz_dst, SDL_SRCCOLORKEY | SDL_RLEACCEL, rz_src->format->colorkey);
+ }
+ /*
+ * Unlock source surface
+ */
+ SDL_UnlockSurface(rz_src);
+
+ } else {
+
+ /*
+ * Angle=0: Just a zoom
+ */
+ /*
+ * --------------------
+ */
+
+ /*
+ * Calculate target size
+ */
+ zoomSurfaceSize(rz_src->w, rz_src->h, zoomx, zoomy, &dstwidth, &dstheight);
+
+ /*
+ * Alloc space to completely contain the zoomed surface
+ */
+ rz_dst = NULL;
+ if (is32bit) {
+ /*
+ * Target surface is 32bit with source RGBA/ABGR ordering
+ */
+ rz_dst =
+ SDL_CreateRGBSurface(SDL_SWSURFACE, dstwidth, dstheight, 32,
+ rz_src->format->Rmask, rz_src->format->Gmask,
+ rz_src->format->Bmask, rz_src->format->Amask);
+ } else {
+ /*
+ * Target surface is 8bit
+ */
+ rz_dst = SDL_CreateRGBSurface(SDL_SWSURFACE, dstwidth, dstheight, 8, 0, 0, 0, 0);
+ }
+
+ /*
+ * Lock source surface
+ */
+ SDL_LockSurface(rz_src);
+ /*
+ * Check which kind of surface we have
+ */
+ if (is32bit) {
+ /*
+ * Call the 32bit transformation routine to do the zooming (using alpha)
+ */
+ zoomSurfaceRGBA(rz_src, rz_dst, flipx, flipy, smooth);
+ /*
+ * Turn on source-alpha support
+ */
+ SDL_SetAlpha(rz_dst, SDL_SRCALPHA, 255);
+ } else {
+ /*
+ * Copy palette and colorkey info
+ */
+ for (i = 0; i < rz_src->format->palette->ncolors; i++) {
+ rz_dst->format->palette->colors[i] = rz_src->format->palette->colors[i];
+ }
+ rz_dst->format->palette->ncolors = rz_src->format->palette->ncolors;
+ /*
+ * Call the 8bit transformation routine to do the zooming
+ */
+ zoomSurfaceY(rz_src, rz_dst, flipx, flipy);
+ SDL_SetColorKey(rz_dst, SDL_SRCCOLORKEY | SDL_RLEACCEL, rz_src->format->colorkey);
+ }
+ /*
+ * Unlock source surface
+ */
+ SDL_UnlockSurface(rz_src);
+ }
+
+ /*
+ * Cleanup temp surface
+ */
+ if (src_converted) {
+ SDL_FreeSurface(rz_src);
+ }
+
+ /*
+ * Return destination surface
+ */
+ return (rz_dst);
+}
+
+/*
+
+ zoomSurface()
+
+ Zoomes a 32bit or 8bit 'src' surface to newly created 'dst' surface.
+ 'zoomx' and 'zoomy' are scaling factors for width and height. If 'smooth' is 1
+ then the destination 32bit surface is anti-aliased. If the surface is not 8bit
+ or 32bit RGBA/ABGR it will be converted into a 32bit RGBA format on the fly.
+
+*/
+
+#define VALUE_LIMIT 0.001
+
+void zoomSurfaceSize(int width, int height, double zoomx, double zoomy, int *dstwidth, int *dstheight)
+{
+ /*
+ * Sanity check zoom factors
+ */
+ if (zoomx < VALUE_LIMIT) {
+ zoomx = VALUE_LIMIT;
+ }
+ if (zoomy < VALUE_LIMIT) {
+ zoomy = VALUE_LIMIT;
+ }
+
+ /*
+ * Calculate target size
+ */
+ *dstwidth = (int) ((double) width * zoomx);
+ *dstheight = (int) ((double) height * zoomy);
+ if (*dstwidth < 1) {
+ *dstwidth = 1;
+ }
+ if (*dstheight < 1) {
+ *dstheight = 1;
+ }
+}
+
+SDL_Surface *zoomSurface(SDL_Surface * src, double zoomx, double zoomy, int smooth)
+{
+ SDL_Surface *rz_src;
+ SDL_Surface *rz_dst;
+ int dstwidth, dstheight;
+ int is32bit;
+ int i, src_converted;
+ int flipx, flipy;
+
+ /*
+ * Sanity check
+ */
+ if (src == NULL)
+ return (NULL);
+
+ /*
+ * Determine if source surface is 32bit or 8bit
+ */
+ is32bit = (src->format->BitsPerPixel == 32);
+ if ((is32bit) || (src->format->BitsPerPixel == 8)) {
+ /*
+ * Use source surface 'as is'
+ */
+ rz_src = src;
+ src_converted = 0;
+ } else {
+ /*
+ * New source surface is 32bit with a defined RGBA ordering
+ */
+ rz_src =
+ SDL_CreateRGBSurface(SDL_SWSURFACE, src->w, src->h, 32, 0x000000ff, 0x0000ff00, 0x00ff0000, 0xff000000);
+ SDL_BlitSurface(src, NULL, rz_src, NULL);
+ src_converted = 1;
+ is32bit = 1;
+ }
+
+ flipx = (zoomx<0);
+ if (flipx) zoomx = -zoomx;
+ flipy = (zoomy<0);
+ if (flipy) zoomy = -zoomy;
+
+ /* Get size if target */
+ zoomSurfaceSize(rz_src->w, rz_src->h, zoomx, zoomy, &dstwidth, &dstheight);
+
+ /*
+ * Alloc space to completely contain the zoomed surface
+ */
+ rz_dst = NULL;
+ if (is32bit) {
+ /*
+ * Target surface is 32bit with source RGBA/ABGR ordering
+ */
+ rz_dst =
+ SDL_CreateRGBSurface(SDL_SWSURFACE, dstwidth, dstheight, 32,
+ rz_src->format->Rmask, rz_src->format->Gmask,
+ rz_src->format->Bmask, rz_src->format->Amask);
+ } else {
+ /*
+ * Target surface is 8bit
+ */
+ rz_dst = SDL_CreateRGBSurface(SDL_SWSURFACE, dstwidth, dstheight, 8, 0, 0, 0, 0);
+ }
+
+ /*
+ * Lock source surface
+ */
+ SDL_LockSurface(rz_src);
+ /*
+ * Check which kind of surface we have
+ */
+ if (is32bit) {
+ /*
+ * Call the 32bit transformation routine to do the zooming (using alpha)
+ */
+ zoomSurfaceRGBA(rz_src, rz_dst, flipx, flipy, smooth);
+ /*
+ * Turn on source-alpha support
+ */
+ SDL_SetAlpha(rz_dst, SDL_SRCALPHA, 255);
+ } else {
+ /*
+ * Copy palette and colorkey info
+ */
+ for (i = 0; i < rz_src->format->palette->ncolors; i++) {
+ rz_dst->format->palette->colors[i] = rz_src->format->palette->colors[i];
+ }
+ rz_dst->format->palette->ncolors = rz_src->format->palette->ncolors;
+ /*
+ * Call the 8bit transformation routine to do the zooming
+ */
+ zoomSurfaceY(rz_src, rz_dst, flipx, flipy);
+ SDL_SetColorKey(rz_dst, SDL_SRCCOLORKEY | SDL_RLEACCEL, rz_src->format->colorkey);
+ }
+ /*
+ * Unlock source surface
+ */
+ SDL_UnlockSurface(rz_src);
+
+ /*
+ * Cleanup temp surface
+ */
+ if (src_converted) {
+ SDL_FreeSurface(rz_src);
+ }
+
+ /*
+ * Return destination surface
+ */
+ return (rz_dst);
+}
Index: client/gui-sdl/SDL_rotozoom.h
===================================================================
--- client/gui-sdl/SDL_rotozoom.h (Revision 0)
+++ client/gui-sdl/SDL_rotozoom.h (Revision 0)
@@ -0,0 +1,105 @@
+
+/*
+
+ SDL_rotozoom - rotozoomer
+
+ LGPL (c) A. Schiffler
+
+*/
+
+#ifndef _SDL_rotozoom_h
+#define _SDL_rotozoom_h
+
+#include <math.h>
+
+/* Set up for C function definitions, even when using C++ */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef M_PI
+#define M_PI 3.141592654
+#endif
+
+#include "SDL.h"
+
+/* ---- Defines */
+
+#define SMOOTHING_OFF 0
+#define SMOOTHING_ON 1
+
+/* ---- Structures */
+
+ typedef struct tColorRGBA {
+ Uint8 r;
+ Uint8 g;
+ Uint8 b;
+ Uint8 a;
+ } tColorRGBA;
+
+ typedef struct tColorY {
+ Uint8 y;
+ } tColorY;
+
+
+/* ---- Prototypes */
+
+#ifdef WIN32
+#ifdef BUILD_DLL
+#define DLLINTERFACE __declspec(dllexport)
+#else
+#define DLLINTERFACE __declspec(dllimport)
+#endif
+#else
+#define DLLINTERFACE
+#endif
+
+/*
+
+ rotozoomSurface()
+
+ Rotates and zoomes a 32bit or 8bit 'src' surface to newly created 'dst' surface.
+ 'angle' is the rotation in degrees. 'zoom' a scaling factor. If 'smooth' is 1
+ then the destination 32bit surface is anti-aliased. If the surface is not 8bit
+ or 32bit RGBA/ABGR it will be converted into a 32bit RGBA format on the fly.
+
+*/
+
+ DLLINTERFACE SDL_Surface *rotozoomSurface(SDL_Surface * src, double angle, double zoom, int smooth);
+
+ DLLINTERFACE SDL_Surface *rotozoomSurfaceXY
+ (SDL_Surface * src, double angle, double zoomx, double zoomy, int smooth);
+
+/* Returns the size of the target surface for a rotozoomSurface() call */
+
+ DLLINTERFACE void rotozoomSurfaceSize(int width, int height, double angle, double zoom, int *dstwidth,
+ int *dstheight);
+
+ DLLINTERFACE void rotozoomSurfaceSizeXY
+ (int width, int height, double angle, double zoomx, double zoomy,
+ int *dstwidth, int *dstheight);
+
+/*
+
+ zoomSurface()
+
+ Zoomes a 32bit or 8bit 'src' surface to newly created 'dst' surface.
+ 'zoomx' and 'zoomy' are scaling factors for width and height. If 'smooth' is 1
+ then the destination 32bit surface is anti-aliased. If the surface is not 8bit
+ or 32bit RGBA/ABGR it will be converted into a 32bit RGBA format on the fly.
+
+*/
+
+ DLLINTERFACE SDL_Surface *zoomSurface(SDL_Surface * src, double zoomx, double zoomy, int smooth);
+
+/* Returns the size of the target surface for a zoomSurface() call */
+
+ DLLINTERFACE void zoomSurfaceSize(int width, int height, double zoomx, double zoomy, int *dstwidth, int *dstheight);
+
+
+/* Ends C function definitions when using C++ */
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _SDL_rotozoom_h */
Index: client/gui-sdl/Makefile.am
===================================================================
--- client/gui-sdl/Makefile.am (Revision 12506)
+++ client/gui-sdl/Makefile.am (Arbeitskopie)
@@ -7,6 +7,8 @@
## Above, note -I../../intl instead of -I$(top_srdir/intl) is deliberate.
libguiclient_a_SOURCES = \
+ SDL_rotozoom.c \
+ SDL_rotozoom.h \
SDL_ttf.c \
SDL_ttf.h \
alphablit.c \
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