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Diffstat (limited to '3rdparty/SDL2/src/render/software/SDL_rotate.c')
-rw-r--r--3rdparty/SDL2/src/render/software/SDL_rotate.c579
1 files changed, 0 insertions, 579 deletions
diff --git a/3rdparty/SDL2/src/render/software/SDL_rotate.c b/3rdparty/SDL2/src/render/software/SDL_rotate.c
deleted file mode 100644
index 0141d174d9f..00000000000
--- a/3rdparty/SDL2/src/render/software/SDL_rotate.c
+++ /dev/null
@@ -1,579 +0,0 @@
-/*
-
-SDL_rotate.c: rotates 32bit or 8bit surfaces
-
-Shamelessly stolen from SDL_gfx by Andreas Schiffler. Original copyright follows:
-
-Copyright (C) 2001-2011 Andreas Schiffler
-
-This software is provided 'as-is', without any express or implied
-warranty. In no event will the authors be held liable for any damages
-arising from the use of this software.
-
-Permission is granted to anyone to use this software for any purpose,
-including commercial applications, and to alter it and redistribute it
-freely, subject to the following restrictions:
-
- 1. The origin of this software must not be misrepresented; you must not
- claim that you wrote the original software. If you use this software
- in a product, an acknowledgment in the product documentation would be
- appreciated but is not required.
-
- 2. Altered source versions must be plainly marked as such, and must not be
- misrepresented as being the original software.
-
- 3. This notice may not be removed or altered from any source
- distribution.
-
-Andreas Schiffler -- aschiffler at ferzkopp dot net
-
-*/
-#include "../../SDL_internal.h"
-
-#if defined(__WIN32__)
-#include "../../core/windows/SDL_windows.h"
-#endif
-
-#include <stdlib.h>
-#include <string.h>
-
-#include "SDL.h"
-#include "SDL_rotate.h"
-
-/* ---- Internally used structures */
-
-/* !
-\brief A 32 bit RGBA pixel.
-*/
-typedef struct tColorRGBA {
- Uint8 r;
- Uint8 g;
- Uint8 b;
- Uint8 a;
-} tColorRGBA;
-
-/* !
-\brief A 8bit Y/palette pixel.
-*/
-typedef struct tColorY {
- Uint8 y;
-} tColorY;
-
-/* !
-\brief Returns maximum of two numbers a and b.
-*/
-#define MAX(a,b) (((a) > (b)) ? (a) : (b))
-
-/* !
-\brief Number of guard rows added to destination surfaces.
-
-This is a simple but effective workaround for observed issues.
-These rows allocate extra memory and are then hidden from the surface.
-Rows are added to the end of destination surfaces when they are allocated.
-This catches any potential overflows which seem to happen with
-just the right src image dimensions and scale/rotation and can lead
-to a situation where the program can segfault.
-*/
-#define GUARD_ROWS (2)
-
-/* !
-\brief Lower limit of absolute zoom factor or rotation degrees.
-*/
-#define VALUE_LIMIT 0.001
-
-/* !
-\brief Returns colorkey info for a surface
-*/
-static Uint32
-_colorkey(SDL_Surface *src)
-{
- Uint32 key = 0;
- SDL_GetColorKey(src, &key);
- return key;
-}
-
-
-/* !
-\brief Internal target surface sizing function for rotations with trig result return.
-
-\param width The source surface width.
-\param height The source surface height.
-\param angle The angle to rotate in degrees.
-\param dstwidth The calculated width of the destination surface.
-\param dstheight The calculated height of the destination surface.
-\param cangle The sine of the angle
-\param sangle The cosine of the angle
-
-*/
-void
-SDLgfx_rotozoomSurfaceSizeTrig(int width, int height, double angle,
- int *dstwidth, int *dstheight,
- double *cangle, double *sangle)
-{
- /* The trig code below gets the wrong size (due to FP inaccuracy?) when angle is a multiple of 90 degrees */
- int angle90 = (int)(angle/90);
- if(angle90 == angle/90) { /* if the angle is a multiple of 90 degrees */
- angle90 %= 4;
- if(angle90 < 0) angle90 += 4; /* 0:0 deg, 1:90 deg, 2:180 deg, 3:270 deg */
- if(angle90 & 1) {
- *dstwidth = height;
- *dstheight = width;
- *cangle = 0;
- *sangle = angle90 == 1 ? -1 : 1; /* reversed because our rotations are clockwise */
- } else {
- *dstwidth = width;
- *dstheight = height;
- *cangle = angle90 == 0 ? 1 : -1;
- *sangle = 0;
- }
- } else {
- 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); /* reverse the angle because our rotations are clockwise */
- *sangle = SDL_sin(radangle);
- *cangle = SDL_cos(radangle);
- x = (double)(width / 2);
- y = (double)(height / 2);
- cx = *cangle * x;
- cy = *cangle * y;
- sx = *sangle * x;
- sy = *sangle * y;
-
- dstwidthhalf = MAX((int)
- SDL_ceil(MAX(MAX(MAX(SDL_fabs(cx + sy), SDL_fabs(cx - sy)), SDL_fabs(-cx + sy)), SDL_fabs(-cx - sy))), 1);
- dstheighthalf = MAX((int)
- SDL_ceil(MAX(MAX(MAX(SDL_fabs(sx + cy), SDL_fabs(sx - cy)), SDL_fabs(-sx + cy)), SDL_fabs(-sx - cy))), 1);
- *dstwidth = 2 * dstwidthhalf;
- *dstheight = 2 * dstheighthalf;
- }
-}
-
-/* Computes source pointer X/Y increments for a rotation that's a multiple of 90 degrees. */
-static void
-computeSourceIncrements90(SDL_Surface * src, int bpp, int angle, int flipx, int flipy,
- int *sincx, int *sincy, int *signx, int *signy)
-{
- int pitch = flipy ? -src->pitch : src->pitch;
- if (flipx) {
- bpp = -bpp;
- }
- switch (angle) { /* 0:0 deg, 1:90 deg, 2:180 deg, 3:270 deg */
- case 0: *sincx = bpp; *sincy = pitch - src->w * *sincx; *signx = *signy = 1; break;
- case 1: *sincx = -pitch; *sincy = bpp - *sincx * src->h; *signx = 1; *signy = -1; break;
- case 2: *sincx = -bpp; *sincy = -src->w * *sincx - pitch; *signx = *signy = -1; break;
- case 3: default: *sincx = pitch; *sincy = -*sincx * src->h - bpp; *signx = -1; *signy = 1; break;
- }
- if (flipx) {
- *signx = -*signx;
- }
- if (flipy) {
- *signy = -*signy;
- }
-}
-
-/* Performs a relatively fast rotation/flip when the angle is a multiple of 90 degrees. */
-#define TRANSFORM_SURFACE_90(pixelType) \
- int dy, dincy = dst->pitch - dst->w*sizeof(pixelType), sincx, sincy, signx, signy; \
- Uint8 *sp = (Uint8*)src->pixels, *dp = (Uint8*)dst->pixels, *de; \
- \
- computeSourceIncrements90(src, sizeof(pixelType), angle, flipx, flipy, &sincx, &sincy, &signx, &signy); \
- if (signx < 0) sp += (src->w-1)*sizeof(pixelType); \
- if (signy < 0) sp += (src->h-1)*src->pitch; \
- \
- for (dy = 0; dy < dst->h; sp += sincy, dp += dincy, dy++) { \
- if (sincx == sizeof(pixelType)) { /* if advancing src and dest equally, use memcpy */ \
- SDL_memcpy(dp, sp, dst->w*sizeof(pixelType)); \
- sp += dst->w*sizeof(pixelType); \
- dp += dst->w*sizeof(pixelType); \
- } else { \
- for (de = dp + dst->w*sizeof(pixelType); dp != de; sp += sincx, dp += sizeof(pixelType)) { \
- *(pixelType*)dp = *(pixelType*)sp; \
- } \
- } \
- }
-
-static void
-transformSurfaceRGBA90(SDL_Surface * src, SDL_Surface * dst, int angle, int flipx, int flipy)
-{
- TRANSFORM_SURFACE_90(tColorRGBA);
-}
-
-static void
-transformSurfaceY90(SDL_Surface * src, SDL_Surface * dst, int angle, int flipx, int flipy)
-{
- TRANSFORM_SURFACE_90(tColorY);
-}
-
-#undef TRANSFORM_SURFACE_90
-
-/* !
-\brief Internal 32 bit rotozoomer with optional anti-aliasing.
-
-Rotates and zooms 32 bit RGBA/ABGR 'src' surface to 'dst' surface based on the control
-parameters by scanning the destination surface and applying optionally anti-aliasing
-by bilinear interpolation.
-Assumes src and dst surfaces are of 32 bit depth.
-Assumes dst surface was allocated with the correct dimensions.
-
-\param src Source surface.
-\param dst Destination surface.
-\param cx Horizontal center coordinate.
-\param cy Vertical center coordinate.
-\param isin Integer version of sine of angle.
-\param icos Integer version of cosine of angle.
-\param flipx Flag indicating horizontal mirroring should be applied.
-\param flipy Flag indicating vertical mirroring should be applied.
-\param smooth Flag indicating anti-aliasing should be used.
-*/
-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, c01, c10, c11, cswap;
- 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 = (tColorRGBA*) 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 (flipx) dx = sw - dx;
- if (flipy) dy = sh - dy;
- if ((unsigned)dx < (unsigned)sw && (unsigned)dy < (unsigned)sh) {
- sp = (tColorRGBA *) ((Uint8 *) src->pixels + src->pitch * dy) + dx;
- c00 = *sp;
- sp += 1;
- c01 = *sp;
- sp += (src->pitch/4);
- c11 = *sp;
- sp -= 1;
- c10 = *sp;
- if (flipx) {
- cswap = c00; c00=c01; c01=cswap;
- cswap = c10; c10=c11; c11=cswap;
- }
- if (flipy) {
- cswap = c00; c00=c10; c10=cswap;
- cswap = c01; c01=c11; c11=cswap;
- }
- /*
- * 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 = (sdx >> 16);
- dy = (sdy >> 16);
- if ((unsigned)dx < (unsigned)src->w && (unsigned)dy < (unsigned)src->h) {
- if(flipx) dx = sw - dx;
- if(flipy) dy = sh - dy;
- *pc = *((tColorRGBA *)((Uint8 *)src->pixels + src->pitch * dy) + dx);
- }
- sdx += icos;
- sdy += isin;
- pc++;
- }
- pc = (tColorRGBA *) ((Uint8 *) pc + gap);
- }
- }
-}
-
-/* !
-
-\brief Rotates and zooms 8 bit palette/Y 'src' surface to 'dst' surface without smoothing.
-
-Rotates and zooms 8 bit RGBA/ABGR 'src' surface to 'dst' surface based on the control
-parameters by scanning the destination surface.
-Assumes src and dst surfaces are of 8 bit depth.
-Assumes dst surface was allocated with the correct dimensions.
-
-\param src Source surface.
-\param dst Destination surface.
-\param cx Horizontal center coordinate.
-\param cy Vertical center coordinate.
-\param isin Integer version of sine of angle.
-\param icos Integer version of cosine of angle.
-\param flipx Flag indicating horizontal mirroring should be applied.
-\param flipy Flag indicating vertical mirroring should be applied.
-*/
-static void
-transformSurfaceY(SDL_Surface * src, SDL_Surface * dst, int cx, int cy, int isin, int icos, int flipx, int flipy)
-{
- int x, y, dx, dy, xd, yd, sdx, sdy, ax, ay;
- tColorY *pc;
- 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);
- pc = (tColorY*) dst->pixels;
- gap = dst->pitch - dst->w;
- /*
- * Clear surface to colorkey
- */
- SDL_memset(pc, (int)(_colorkey(src) & 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 = (sdx >> 16);
- dy = (sdy >> 16);
- if ((unsigned)dx < (unsigned)src->w && (unsigned)dy < (unsigned)src->h) {
- if (flipx) dx = (src->w-1)-dx;
- if (flipy) dy = (src->h-1)-dy;
- *pc = *((tColorY *)src->pixels + src->pitch * dy + dx);
- }
- sdx += icos;
- sdy += isin;
- pc++;
- }
- pc += gap;
- }
-}
-
-
-/* !
-\brief Rotates and zooms a surface with different horizontal and vertival scaling factors and optional anti-aliasing.
-
-Rotates a 32bit or 8bit 'src' surface to newly created 'dst' surface.
-'angle' is the rotation in degrees, 'centerx' and 'centery' the rotation center. If 'smooth' is set
-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.
-
-\param src The surface to rotozoom.
-\param angle The angle to rotate in degrees.
-\param centerx The horizontal coordinate of the center of rotation
-\param zoomy The vertical coordinate of the center of rotation
-\param smooth Antialiasing flag; set to SMOOTHING_ON to enable.
-\param flipx Set to 1 to flip the image horizontally
-\param flipy Set to 1 to flip the image vertically
-\param dstwidth The destination surface width
-\param dstheight The destination surface height
-\param cangle The angle cosine
-\param sangle The angle sine
-\return The new rotated surface.
-
-*/
-
-SDL_Surface *
-SDLgfx_rotateSurface(SDL_Surface * src, double angle, int centerx, int centery, int smooth, int flipx, int flipy, int dstwidth, int dstheight, double cangle, double sangle)
-{
- SDL_Surface *rz_src;
- SDL_Surface *rz_dst;
- int is32bit, angle90;
- int i;
- Uint8 r = 0, g = 0, b = 0;
- Uint32 colorkey = 0;
- int colorKeyAvailable = 0;
- double sangleinv, cangleinv;
-
- /*
- * Sanity check
- */
- if (src == NULL)
- return (NULL);
-
- if (src->flags & SDL_TRUE/* SDL_SRCCOLORKEY */)
- {
- colorkey = _colorkey(src);
- SDL_GetRGB(colorkey, src->format, &r, &g, &b);
- colorKeyAvailable = 1;
- }
- /*
- * 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;
- } else {
- rz_src = SDL_ConvertSurfaceFormat(src, SDL_PIXELFORMAT_ARGB32, src->flags);
- if (rz_src == NULL) {
- return NULL;
- }
- is32bit = 1;
- }
-
- /* Determine target size */
- /* _rotozoomSurfaceSizeTrig(rz_src->w, rz_src->h, angle, &dstwidth, &dstheight, &cangle, &sangle); */
-
- /*
- * Calculate target factors from sin/cos and zoom
- */
- sangleinv = sangle*65536.0;
- cangleinv = cangle*65536.0;
-
- /*
- * Alloc space to completely contain the rotated surface
- */
- if (is32bit) {
- /*
- * Target surface is 32bit with source RGBA/ABGR ordering
- */
- rz_dst =
- SDL_CreateRGBSurface(SDL_SWSURFACE, dstwidth, dstheight + GUARD_ROWS, 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 + GUARD_ROWS, 8, 0, 0, 0, 0);
- }
-
- /* Check target */
- if (rz_dst == NULL)
- return NULL;
-
- /* Adjust for guard rows */
- rz_dst->h = dstheight;
-
- if (colorKeyAvailable == 1){
- colorkey = SDL_MapRGB(rz_dst->format, r, g, b);
-
- SDL_FillRect(rz_dst, NULL, colorkey );
- }
-
- /*
- * Lock source surface
- */
- if (SDL_MUSTLOCK(rz_src)) {
- SDL_LockSurface(rz_src);
- }
-
- /* check if the rotation is a multiple of 90 degrees so we can take a fast path and also somewhat reduce
- * the off-by-one problem in _transformSurfaceRGBA that expresses itself when the rotation is near
- * multiples of 90 degrees.
- */
- angle90 = (int)(angle/90);
- if (angle90 == angle/90) {
- angle90 %= 4;
- if (angle90 < 0) angle90 += 4; /* 0:0 deg, 1:90 deg, 2:180 deg, 3:270 deg */
- } else {
- angle90 = -1;
- }
-
- /*
- * Check which kind of surface we have
- */
- if (is32bit) {
- /*
- * Call the 32bit transformation routine to do the rotation (using alpha)
- */
- if (angle90 >= 0) {
- transformSurfaceRGBA90(rz_src, rz_dst, angle90, flipx, flipy);
- } else {
- _transformSurfaceRGBA(rz_src, rz_dst, centerx, centery, (int) (sangleinv), (int) (cangleinv), flipx, flipy, smooth);
- }
- /*
- * Turn on source-alpha support
- */
- /* SDL_SetAlpha(rz_dst, SDL_SRCALPHA, 255); */
- SDL_SetColorKey(rz_dst, /* SDL_SRCCOLORKEY */ SDL_TRUE | SDL_RLEACCEL, _colorkey(rz_src));
- } 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
- */
- if(angle90 >= 0) {
- transformSurfaceY90(rz_src, rz_dst, angle90, flipx, flipy);
- } else {
- transformSurfaceY(rz_src, rz_dst, centerx, centery, (int)(sangleinv), (int)(cangleinv), flipx, flipy);
- }
- SDL_SetColorKey(rz_dst, /* SDL_SRCCOLORKEY */ SDL_TRUE | SDL_RLEACCEL, _colorkey(rz_src));
- }
-
- /* copy alpha mod, color mod, and blend mode */
- {
- SDL_BlendMode blendMode;
- Uint8 alphaMod, cr, cg, cb;
- SDL_GetSurfaceAlphaMod(src, &alphaMod);
- SDL_GetSurfaceBlendMode(src, &blendMode);
- SDL_GetSurfaceColorMod(src, &cr, &cg, &cb);
- SDL_SetSurfaceAlphaMod(rz_dst, alphaMod);
- SDL_SetSurfaceBlendMode(rz_dst, blendMode);
- SDL_SetSurfaceColorMod(rz_dst, cr, cg, cb);
- }
-
- /*
- * Unlock source surface
- */
- if (SDL_MUSTLOCK(rz_src)) {
- SDL_UnlockSurface(rz_src);
- }
-
- /*
- * Cleanup temp surface
- */
- if (rz_src != src) {
- SDL_FreeSurface(rz_src);
- }
-
- /*
- * Return destination surface
- */
- return (rz_dst);
-}