*rename

1 files changed, 0 insertions, 1246 deletions

diff --git a/Source/3rdParty/SDL2/src/video/SDL_surface.c b/Source/3rdParty/SDL2/src/video/SDL_surface.c
deleted file mode 100644
index 1b2ee6c..0000000
--- a/Source/3rdParty/SDL2/src/video/SDL_surface.c
+++ /dev/null
@@ -1,1246 +0,0 @@
-/*
-  Simple DirectMedia Layer
-  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
-
-  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.
-*/
-#include "../SDL_internal.h"
-
-#include "SDL_video.h"
-#include "SDL_sysvideo.h"
-#include "SDL_blit.h"
-#include "SDL_RLEaccel_c.h"
-#include "SDL_pixels_c.h"
-#include "SDL_yuv_c.h"
-
-
-/* Check to make sure we can safely check multiplication of surface w and pitch and it won't overflow size_t */
-SDL_COMPILE_TIME_ASSERT(surface_size_assumptions,
-    sizeof(int) == sizeof(Sint32) && sizeof(size_t) >= sizeof(Sint32));
-
-/* Public routines */
-
-/*
- * Calculate the pad-aligned scanline width of a surface
- */
-static int
-SDL_CalculatePitch(Uint32 format, int width)
-{
-    int pitch;
-
-    /* Surface should be 4-byte aligned for speed */
-    pitch = width * SDL_BYTESPERPIXEL(format);
-    switch (SDL_BITSPERPIXEL(format)) {
-    case 1:
-        pitch = (pitch + 7) / 8;
-        break;
-    case 4:
-        pitch = (pitch + 1) / 2;
-        break;
-    default:
-        break;
-    }
-    pitch = (pitch + 3) & ~3;   /* 4-byte aligning */
-    return pitch;
-}
-
-/*
- * Create an empty RGB surface of the appropriate depth using the given
- * enum SDL_PIXELFORMAT_* format
- */
-SDL_Surface *
-SDL_CreateRGBSurfaceWithFormat(Uint32 flags, int width, int height, int depth,
-                               Uint32 format)
-{
-    SDL_Surface *surface;
-
-    /* The flags are no longer used, make the compiler happy */
-    (void)flags;
-
-    /* Allocate the surface */
-    surface = (SDL_Surface *) SDL_calloc(1, sizeof(*surface));
-    if (surface == NULL) {
-        SDL_OutOfMemory();
-        return NULL;
-    }
-
-    surface->format = SDL_AllocFormat(format);
-    if (!surface->format) {
-        SDL_FreeSurface(surface);
-        return NULL;
-    }
-    surface->w = width;
-    surface->h = height;
-    surface->pitch = SDL_CalculatePitch(format, width);
-    SDL_SetClipRect(surface, NULL);
-
-    if (SDL_ISPIXELFORMAT_INDEXED(surface->format->format)) {
-        SDL_Palette *palette =
-            SDL_AllocPalette((1 << surface->format->BitsPerPixel));
-        if (!palette) {
-            SDL_FreeSurface(surface);
-            return NULL;
-        }
-        if (palette->ncolors == 2) {
-            /* Create a black and white bitmap palette */
-            palette->colors[0].r = 0xFF;
-            palette->colors[0].g = 0xFF;
-            palette->colors[0].b = 0xFF;
-            palette->colors[1].r = 0x00;
-            palette->colors[1].g = 0x00;
-            palette->colors[1].b = 0x00;
-        }
-        SDL_SetSurfacePalette(surface, palette);
-        SDL_FreePalette(palette);
-    }
-
-    /* Get the pixels */
-    if (surface->w && surface->h) {
-        /* Assumptions checked in surface_size_assumptions assert above */
-        Sint64 size = ((Sint64)surface->h * surface->pitch);
-        if (size < 0 || size > SDL_MAX_SINT32) {
-            /* Overflow... */
-            SDL_FreeSurface(surface);
-            SDL_OutOfMemory();
-            return NULL;
-        }
-
-        surface->pixels = SDL_malloc((size_t)size);
-        if (!surface->pixels) {
-            SDL_FreeSurface(surface);
-            SDL_OutOfMemory();
-            return NULL;
-        }
-        /* This is important for bitmaps */
-        SDL_memset(surface->pixels, 0, surface->h * surface->pitch);
-    }
-
-    /* Allocate an empty mapping */
-    surface->map = SDL_AllocBlitMap();
-    if (!surface->map) {
-        SDL_FreeSurface(surface);
-        return NULL;
-    }
-
-    /* By default surface with an alpha mask are set up for blending */
-    if (surface->format->Amask) {
-        SDL_SetSurfaceBlendMode(surface, SDL_BLENDMODE_BLEND);
-    }
-
-    /* The surface is ready to go */
-    surface->refcount = 1;
-    return surface;
-}
-
-/*
- * Create an empty RGB surface of the appropriate depth
- */
-SDL_Surface *
-SDL_CreateRGBSurface(Uint32 flags,
-                     int width, int height, int depth,
-                     Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask)
-{
-    Uint32 format;
-
-    /* Get the pixel format */
-    format = SDL_MasksToPixelFormatEnum(depth, Rmask, Gmask, Bmask, Amask);
-    if (format == SDL_PIXELFORMAT_UNKNOWN) {
-        SDL_SetError("Unknown pixel format");
-        return NULL;
-    }
-
-    return SDL_CreateRGBSurfaceWithFormat(flags, width, height, depth, format);
-}
-
-/*
- * Create an RGB surface from an existing memory buffer
- */
-SDL_Surface *
-SDL_CreateRGBSurfaceFrom(void *pixels,
-                         int width, int height, int depth, int pitch,
-                         Uint32 Rmask, Uint32 Gmask, Uint32 Bmask,
-                         Uint32 Amask)
-{
-    SDL_Surface *surface;
-
-    surface = SDL_CreateRGBSurface(0, 0, 0, depth, Rmask, Gmask, Bmask, Amask);
-    if (surface != NULL) {
-        surface->flags |= SDL_PREALLOC;
-        surface->pixels = pixels;
-        surface->w = width;
-        surface->h = height;
-        surface->pitch = pitch;
-        SDL_SetClipRect(surface, NULL);
-    }
-    return surface;
-}
-
-/*
- * Create an RGB surface from an existing memory buffer using the given given
- * enum SDL_PIXELFORMAT_* format
- */
-SDL_Surface *
-SDL_CreateRGBSurfaceWithFormatFrom(void *pixels,
-                         int width, int height, int depth, int pitch,
-                         Uint32 format)
-{
-    SDL_Surface *surface;
-
-    surface = SDL_CreateRGBSurfaceWithFormat(0, 0, 0, depth, format);
-    if (surface != NULL) {
-        surface->flags |= SDL_PREALLOC;
-        surface->pixels = pixels;
-        surface->w = width;
-        surface->h = height;
-        surface->pitch = pitch;
-        SDL_SetClipRect(surface, NULL);
-    }
-    return surface;
-}
-
-int
-SDL_SetSurfacePalette(SDL_Surface * surface, SDL_Palette * palette)
-{
-    if (!surface) {
-        return SDL_SetError("SDL_SetSurfacePalette() passed a NULL surface");
-    }
-    if (SDL_SetPixelFormatPalette(surface->format, palette) < 0) {
-        return -1;
-    }
-    SDL_InvalidateMap(surface->map);
-
-    return 0;
-}
-
-int
-SDL_SetSurfaceRLE(SDL_Surface * surface, int flag)
-{
-    int flags;
-
-    if (!surface) {
-        return -1;
-    }
-
-    flags = surface->map->info.flags;
-    if (flag) {
-        surface->map->info.flags |= SDL_COPY_RLE_DESIRED;
-    } else {
-        surface->map->info.flags &= ~SDL_COPY_RLE_DESIRED;
-    }
-    if (surface->map->info.flags != flags) {
-        SDL_InvalidateMap(surface->map);
-    }
-    return 0;
-}
-
-int
-SDL_SetColorKey(SDL_Surface * surface, int flag, Uint32 key)
-{
-    int flags;
-
-    if (!surface) {
-        return SDL_InvalidParamError("surface");
-    }
-
-    if (surface->format->palette && key >= ((Uint32) surface->format->palette->ncolors)) {
-        return SDL_InvalidParamError("key");
-    }
-
-    if (flag & SDL_RLEACCEL) {
-        SDL_SetSurfaceRLE(surface, 1);
-    }
-
-    flags = surface->map->info.flags;
-    if (flag) {
-        surface->map->info.flags |= SDL_COPY_COLORKEY;
-        surface->map->info.colorkey = key;
-        if (surface->format->palette) {
-            surface->format->palette->colors[surface->map->info.colorkey].a = SDL_ALPHA_TRANSPARENT;
-            ++surface->format->palette->version;
-            if (!surface->format->palette->version) {
-                surface->format->palette->version = 1;
-            }
-        }
-    } else {
-        if (surface->format->palette) {
-            surface->format->palette->colors[surface->map->info.colorkey].a = SDL_ALPHA_OPAQUE;
-            ++surface->format->palette->version;
-            if (!surface->format->palette->version) {
-                surface->format->palette->version = 1;
-            }
-        }
-        surface->map->info.flags &= ~SDL_COPY_COLORKEY;
-    }
-    if (surface->map->info.flags != flags) {
-        SDL_InvalidateMap(surface->map);
-    }
-
-    return 0;
-}
-
-SDL_bool
-SDL_HasColorKey(SDL_Surface * surface)
-{
-    if (!surface) {
-        return SDL_FALSE;
-    }
-
-    if (!(surface->map->info.flags & SDL_COPY_COLORKEY)) {
-        return SDL_FALSE;
-    }
-
-	return SDL_TRUE;
-}
-
-int
-SDL_GetColorKey(SDL_Surface * surface, Uint32 * key)
-{
-    if (!surface) {
-        return SDL_InvalidParamError("surface");
-    }
-
-    if (!(surface->map->info.flags & SDL_COPY_COLORKEY)) {
-        return SDL_SetError("Surface doesn't have a colorkey");
-    }
-
-    if (key) {
-        *key = surface->map->info.colorkey;
-    }
-    return 0;
-}
-
-/* This is a fairly slow function to switch from colorkey to alpha */
-static void
-SDL_ConvertColorkeyToAlpha(SDL_Surface * surface)
-{
-    int x, y;
-
-    if (!surface) {
-        return;
-    }
-
-    if (!(surface->map->info.flags & SDL_COPY_COLORKEY) ||
-        !surface->format->Amask) {
-        return;
-    }
-
-    SDL_LockSurface(surface);
-
-    switch (surface->format->BytesPerPixel) {
-    case 2:
-        {
-            Uint16 *row, *spot;
-            Uint16 ckey = (Uint16) surface->map->info.colorkey;
-            Uint16 mask = (Uint16) (~surface->format->Amask);
-
-            /* Ignore alpha in colorkey comparison */
-            ckey &= mask;
-            row = (Uint16 *) surface->pixels;
-            for (y = surface->h; y--;) {
-                spot = row;
-                for (x = surface->w; x--;) {
-                    if ((*spot & mask) == ckey) {
-                        *spot &= mask;
-                    }
-                    ++spot;
-                }
-                row += surface->pitch / 2;
-            }
-        }
-        break;
-    case 3:
-        /* FIXME */
-        break;
-    case 4:
-        {
-            Uint32 *row, *spot;
-            Uint32 ckey = surface->map->info.colorkey;
-            Uint32 mask = ~surface->format->Amask;
-
-            /* Ignore alpha in colorkey comparison */
-            ckey &= mask;
-            row = (Uint32 *) surface->pixels;
-            for (y = surface->h; y--;) {
-                spot = row;
-                for (x = surface->w; x--;) {
-                    if ((*spot & mask) == ckey) {
-                        *spot &= mask;
-                    }
-                    ++spot;
-                }
-                row += surface->pitch / 4;
-            }
-        }
-        break;
-    }
-
-    SDL_UnlockSurface(surface);
-
-    SDL_SetColorKey(surface, 0, 0);
-    SDL_SetSurfaceBlendMode(surface, SDL_BLENDMODE_BLEND);
-}
-
-int
-SDL_SetSurfaceColorMod(SDL_Surface * surface, Uint8 r, Uint8 g, Uint8 b)
-{
-    int flags;
-
-    if (!surface) {
-        return -1;
-    }
-
-    surface->map->info.r = r;
-    surface->map->info.g = g;
-    surface->map->info.b = b;
-
-    flags = surface->map->info.flags;
-    if (r != 0xFF || g != 0xFF || b != 0xFF) {
-        surface->map->info.flags |= SDL_COPY_MODULATE_COLOR;
-    } else {
-        surface->map->info.flags &= ~SDL_COPY_MODULATE_COLOR;
-    }
-    if (surface->map->info.flags != flags) {
-        SDL_InvalidateMap(surface->map);
-    }
-    return 0;
-}
-
-
-int
-SDL_GetSurfaceColorMod(SDL_Surface * surface, Uint8 * r, Uint8 * g, Uint8 * b)
-{
-    if (!surface) {
-        return -1;
-    }
-
-    if (r) {
-        *r = surface->map->info.r;
-    }
-    if (g) {
-        *g = surface->map->info.g;
-    }
-    if (b) {
-        *b = surface->map->info.b;
-    }
-    return 0;
-}
-
-int
-SDL_SetSurfaceAlphaMod(SDL_Surface * surface, Uint8 alpha)
-{
-    int flags;
-
-    if (!surface) {
-        return -1;
-    }
-
-    surface->map->info.a = alpha;
-
-    flags = surface->map->info.flags;
-    if (alpha != 0xFF) {
-        surface->map->info.flags |= SDL_COPY_MODULATE_ALPHA;
-    } else {
-        surface->map->info.flags &= ~SDL_COPY_MODULATE_ALPHA;
-    }
-    if (surface->map->info.flags != flags) {
-        SDL_InvalidateMap(surface->map);
-    }
-    return 0;
-}
-
-int
-SDL_GetSurfaceAlphaMod(SDL_Surface * surface, Uint8 * alpha)
-{
-    if (!surface) {
-        return -1;
-    }
-
-    if (alpha) {
-        *alpha = surface->map->info.a;
-    }
-    return 0;
-}
-
-int
-SDL_SetSurfaceBlendMode(SDL_Surface * surface, SDL_BlendMode blendMode)
-{
-    int flags, status;
-
-    if (!surface) {
-        return -1;
-    }
-
-    status = 0;
-    flags = surface->map->info.flags;
-    surface->map->info.flags &=
-        ~(SDL_COPY_BLEND | SDL_COPY_ADD | SDL_COPY_MOD);
-    switch (blendMode) {
-    case SDL_BLENDMODE_NONE:
-        break;
-    case SDL_BLENDMODE_BLEND:
-        surface->map->info.flags |= SDL_COPY_BLEND;
-        break;
-    case SDL_BLENDMODE_ADD:
-        surface->map->info.flags |= SDL_COPY_ADD;
-        break;
-    case SDL_BLENDMODE_MOD:
-        surface->map->info.flags |= SDL_COPY_MOD;
-        break;
-    default:
-        status = SDL_Unsupported();
-        break;
-    }
-
-    if (surface->map->info.flags != flags) {
-        SDL_InvalidateMap(surface->map);
-    }
-
-    return status;
-}
-
-int
-SDL_GetSurfaceBlendMode(SDL_Surface * surface, SDL_BlendMode *blendMode)
-{
-    if (!surface) {
-        return -1;
-    }
-
-    if (!blendMode) {
-        return 0;
-    }
-
-    switch (surface->map->
-            info.flags & (SDL_COPY_BLEND | SDL_COPY_ADD | SDL_COPY_MOD)) {
-    case SDL_COPY_BLEND:
-        *blendMode = SDL_BLENDMODE_BLEND;
-        break;
-    case SDL_COPY_ADD:
-        *blendMode = SDL_BLENDMODE_ADD;
-        break;
-    case SDL_COPY_MOD:
-        *blendMode = SDL_BLENDMODE_MOD;
-        break;
-    default:
-        *blendMode = SDL_BLENDMODE_NONE;
-        break;
-    }
-    return 0;
-}
-
-SDL_bool
-SDL_SetClipRect(SDL_Surface * surface, const SDL_Rect * rect)
-{
-    SDL_Rect full_rect;
-
-    /* Don't do anything if there's no surface to act on */
-    if (!surface) {
-        return SDL_FALSE;
-    }
-
-    /* Set up the full surface rectangle */
-    full_rect.x = 0;
-    full_rect.y = 0;
-    full_rect.w = surface->w;
-    full_rect.h = surface->h;
-
-    /* Set the clipping rectangle */
-    if (!rect) {
-        surface->clip_rect = full_rect;
-        return SDL_TRUE;
-    }
-    return SDL_IntersectRect(rect, &full_rect, &surface->clip_rect);
-}
-
-void
-SDL_GetClipRect(SDL_Surface * surface, SDL_Rect * rect)
-{
-    if (surface && rect) {
-        *rect = surface->clip_rect;
-    }
-}
-
-/*
- * Set up a blit between two surfaces -- split into three parts:
- * The upper part, SDL_UpperBlit(), performs clipping and rectangle
- * verification.  The lower part is a pointer to a low level
- * accelerated blitting function.
- *
- * These parts are separated out and each used internally by this
- * library in the optimimum places.  They are exported so that if
- * you know exactly what you are doing, you can optimize your code
- * by calling the one(s) you need.
- */
-int
-SDL_LowerBlit(SDL_Surface * src, SDL_Rect * srcrect,
-              SDL_Surface * dst, SDL_Rect * dstrect)
-{
-    /* Check to make sure the blit mapping is valid */
-    if ((src->map->dst != dst) ||
-        (dst->format->palette &&
-         src->map->dst_palette_version != dst->format->palette->version) ||
-        (src->format->palette &&
-         src->map->src_palette_version != src->format->palette->version)) {
-        if (SDL_MapSurface(src, dst) < 0) {
-            return (-1);
-        }
-        /* just here for debugging */
-/*         printf */
-/*             ("src = 0x%08X src->flags = %08X src->map->info.flags = %08x\ndst = 0x%08X dst->flags = %08X dst->map->info.flags = %08X\nsrc->map->blit = 0x%08x\n", */
-/*              src, dst->flags, src->map->info.flags, dst, dst->flags, */
-/*              dst->map->info.flags, src->map->blit); */
-    }
-    return (src->map->blit(src, srcrect, dst, dstrect));
-}
-
-
-int
-SDL_UpperBlit(SDL_Surface * src, const SDL_Rect * srcrect,
-              SDL_Surface * dst, SDL_Rect * dstrect)
-{
-    SDL_Rect fulldst;
-    int srcx, srcy, w, h;
-
-    /* Make sure the surfaces aren't locked */
-    if (!src || !dst) {
-        return SDL_SetError("SDL_UpperBlit: passed a NULL surface");
-    }
-    if (src->locked || dst->locked) {
-        return SDL_SetError("Surfaces must not be locked during blit");
-    }
-
-    /* If the destination rectangle is NULL, use the entire dest surface */
-    if (dstrect == NULL) {
-        fulldst.x = fulldst.y = 0;
-        fulldst.w = dst->w;
-        fulldst.h = dst->h;
-        dstrect = &fulldst;
-    }
-
-    /* clip the source rectangle to the source surface */
-    if (srcrect) {
-        int maxw, maxh;
-
-        srcx = srcrect->x;
-        w = srcrect->w;
-        if (srcx < 0) {
-            w += srcx;
-            dstrect->x -= srcx;
-            srcx = 0;
-        }
-        maxw = src->w - srcx;
-        if (maxw < w)
-            w = maxw;
-
-        srcy = srcrect->y;
-        h = srcrect->h;
-        if (srcy < 0) {
-            h += srcy;
-            dstrect->y -= srcy;
-            srcy = 0;
-        }
-        maxh = src->h - srcy;
-        if (maxh < h)
-            h = maxh;
-
-    } else {
-        srcx = srcy = 0;
-        w = src->w;
-        h = src->h;
-    }
-
-    /* clip the destination rectangle against the clip rectangle */
-    {
-        SDL_Rect *clip = &dst->clip_rect;
-        int dx, dy;
-
-        dx = clip->x - dstrect->x;
-        if (dx > 0) {
-            w -= dx;
-            dstrect->x += dx;
-            srcx += dx;
-        }
-        dx = dstrect->x + w - clip->x - clip->w;
-        if (dx > 0)
-            w -= dx;
-
-        dy = clip->y - dstrect->y;
-        if (dy > 0) {
-            h -= dy;
-            dstrect->y += dy;
-            srcy += dy;
-        }
-        dy = dstrect->y + h - clip->y - clip->h;
-        if (dy > 0)
-            h -= dy;
-    }
-
-    /* Switch back to a fast blit if we were previously stretching */
-    if (src->map->info.flags & SDL_COPY_NEAREST) {
-        src->map->info.flags &= ~SDL_COPY_NEAREST;
-        SDL_InvalidateMap(src->map);
-    }
-
-    if (w > 0 && h > 0) {
-        SDL_Rect sr;
-        sr.x = srcx;
-        sr.y = srcy;
-        sr.w = dstrect->w = w;
-        sr.h = dstrect->h = h;
-        return SDL_LowerBlit(src, &sr, dst, dstrect);
-    }
-    dstrect->w = dstrect->h = 0;
-    return 0;
-}
-
-int
-SDL_UpperBlitScaled(SDL_Surface * src, const SDL_Rect * srcrect,
-              SDL_Surface * dst, SDL_Rect * dstrect)
-{
-    double src_x0, src_y0, src_x1, src_y1;
-    double dst_x0, dst_y0, dst_x1, dst_y1;
-    SDL_Rect final_src, final_dst;
-    double scaling_w, scaling_h;
-    int src_w, src_h;
-    int dst_w, dst_h;
-
-    /* Make sure the surfaces aren't locked */
-    if (!src || !dst) {
-        return SDL_SetError("SDL_UpperBlitScaled: passed a NULL surface");
-    }
-    if (src->locked || dst->locked) {
-        return SDL_SetError("Surfaces must not be locked during blit");
-    }
-
-    if (NULL == srcrect) {
-        src_w = src->w;
-        src_h = src->h;
-    } else {
-        src_w = srcrect->w;
-        src_h = srcrect->h;
-    }
-
-    if (NULL == dstrect) {
-        dst_w = dst->w;
-        dst_h = dst->h;
-    } else {
-        dst_w = dstrect->w;
-        dst_h = dstrect->h;
-    }
-
-    if (dst_w == src_w && dst_h == src_h) {
-        /* No scaling, defer to regular blit */
-        return SDL_BlitSurface(src, srcrect, dst, dstrect);
-    }
-
-    scaling_w = (double)dst_w / src_w;
-    scaling_h = (double)dst_h / src_h;
-
-    if (NULL == dstrect) {
-        dst_x0 = 0;
-        dst_y0 = 0;
-        dst_x1 = dst_w - 1;
-        dst_y1 = dst_h - 1;
-    } else {
-        dst_x0 = dstrect->x;
-        dst_y0 = dstrect->y;
-        dst_x1 = dst_x0 + dst_w - 1;
-        dst_y1 = dst_y0 + dst_h - 1;
-    }
-
-    if (NULL == srcrect) {
-        src_x0 = 0;
-        src_y0 = 0;
-        src_x1 = src_w - 1;
-        src_y1 = src_h - 1;
-    } else {
-        src_x0 = srcrect->x;
-        src_y0 = srcrect->y;
-        src_x1 = src_x0 + src_w - 1;
-        src_y1 = src_y0 + src_h - 1;
-
-        /* Clip source rectangle to the source surface */
-
-        if (src_x0 < 0) {
-            dst_x0 -= src_x0 * scaling_w;
-            src_x0 = 0;
-        }
-
-        if (src_x1 >= src->w) {
-            dst_x1 -= (src_x1 - src->w + 1) * scaling_w;
-            src_x1 = src->w - 1;
-        }
-
-        if (src_y0 < 0) {
-            dst_y0 -= src_y0 * scaling_h;
-            src_y0 = 0;
-        }
-
-        if (src_y1 >= src->h) {
-            dst_y1 -= (src_y1 - src->h + 1) * scaling_h;
-            src_y1 = src->h - 1;
-        }
-    }
-
-    /* Clip destination rectangle to the clip rectangle */
-
-    /* Translate to clip space for easier calculations */
-    dst_x0 -= dst->clip_rect.x;
-    dst_x1 -= dst->clip_rect.x;
-    dst_y0 -= dst->clip_rect.y;
-    dst_y1 -= dst->clip_rect.y;
-
-    if (dst_x0 < 0) {
-        src_x0 -= dst_x0 / scaling_w;
-        dst_x0 = 0;
-    }
-
-    if (dst_x1 >= dst->clip_rect.w) {
-        src_x1 -= (dst_x1 - dst->clip_rect.w + 1) / scaling_w;
-        dst_x1 = dst->clip_rect.w - 1;
-    }
-
-    if (dst_y0 < 0) {
-        src_y0 -= dst_y0 / scaling_h;
-        dst_y0 = 0;
-    }
-
-    if (dst_y1 >= dst->clip_rect.h) {
-        src_y1 -= (dst_y1 - dst->clip_rect.h + 1) / scaling_h;
-        dst_y1 = dst->clip_rect.h - 1;
-    }
-
-    /* Translate back to surface coordinates */
-    dst_x0 += dst->clip_rect.x;
-    dst_x1 += dst->clip_rect.x;
-    dst_y0 += dst->clip_rect.y;
-    dst_y1 += dst->clip_rect.y;
-
-    final_src.x = (int)SDL_floor(src_x0 + 0.5);
-    final_src.y = (int)SDL_floor(src_y0 + 0.5);
-    final_src.w = (int)SDL_floor(src_x1 + 1 + 0.5) - (int)SDL_floor(src_x0 + 0.5);
-    final_src.h = (int)SDL_floor(src_y1 + 1 + 0.5) - (int)SDL_floor(src_y0 + 0.5);
-
-    final_dst.x = (int)SDL_floor(dst_x0 + 0.5);
-    final_dst.y = (int)SDL_floor(dst_y0 + 0.5);
-    final_dst.w = (int)SDL_floor(dst_x1 - dst_x0 + 1.5);
-    final_dst.h = (int)SDL_floor(dst_y1 - dst_y0 + 1.5);
-
-    if (final_dst.w < 0)
-        final_dst.w = 0;
-    if (final_dst.h < 0)
-        final_dst.h = 0;
-
-    if (dstrect)
-        *dstrect = final_dst;
-
-    if (final_dst.w == 0 || final_dst.h == 0 ||
-        final_src.w <= 0 || final_src.h <= 0) {
-        /* No-op. */
-        return 0;
-    }
-
-    return SDL_LowerBlitScaled(src, &final_src, dst, &final_dst);
-}
-
-/**
- *  This is a semi-private blit function and it performs low-level surface
- *  scaled blitting only.
- */
-int
-SDL_LowerBlitScaled(SDL_Surface * src, SDL_Rect * srcrect,
-                SDL_Surface * dst, SDL_Rect * dstrect)
-{
-    static const Uint32 complex_copy_flags = (
-        SDL_COPY_MODULATE_COLOR | SDL_COPY_MODULATE_ALPHA |
-        SDL_COPY_BLEND | SDL_COPY_ADD | SDL_COPY_MOD |
-        SDL_COPY_COLORKEY
-    );
-
-    if (!(src->map->info.flags & SDL_COPY_NEAREST)) {
-        src->map->info.flags |= SDL_COPY_NEAREST;
-        SDL_InvalidateMap(src->map);
-    }
-
-    if ( !(src->map->info.flags & complex_copy_flags) &&
-         src->format->format == dst->format->format &&
-         !SDL_ISPIXELFORMAT_INDEXED(src->format->format) ) {
-        return SDL_SoftStretch( src, srcrect, dst, dstrect );
-    } else {
-        return SDL_LowerBlit( src, srcrect, dst, dstrect );
-    }
-}
-
-/*
- * Lock a surface to directly access the pixels
- */
-int
-SDL_LockSurface(SDL_Surface * surface)
-{
-    if (!surface->locked) {
-        /* Perform the lock */
-        if (surface->flags & SDL_RLEACCEL) {
-            SDL_UnRLESurface(surface, 1);
-            surface->flags |= SDL_RLEACCEL;     /* save accel'd state */
-        }
-    }
-
-    /* Increment the surface lock count, for recursive locks */
-    ++surface->locked;
-
-    /* Ready to go.. */
-    return (0);
-}
-
-/*
- * Unlock a previously locked surface
- */
-void
-SDL_UnlockSurface(SDL_Surface * surface)
-{
-    /* Only perform an unlock if we are locked */
-    if (!surface->locked || (--surface->locked > 0)) {
-        return;
-    }
-
-    /* Update RLE encoded surface with new data */
-    if ((surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL) {
-        surface->flags &= ~SDL_RLEACCEL;        /* stop lying */
-        SDL_RLESurface(surface);
-    }
-}
-
-/*
- * Creates a new surface identical to the existing surface
- */
-SDL_Surface *
-SDL_DuplicateSurface(SDL_Surface * surface)
-{
-    return SDL_ConvertSurface(surface, surface->format, surface->flags);
-}
-
-/*
- * Convert a surface into the specified pixel format.
- */
-SDL_Surface *
-SDL_ConvertSurface(SDL_Surface * surface, const SDL_PixelFormat * format,
-                   Uint32 flags)
-{
-    SDL_Surface *convert;
-    Uint32 copy_flags;
-    SDL_Color copy_color;
-    SDL_Rect bounds;
-
-    if (!surface) {
-        SDL_InvalidParamError("surface");
-        return NULL;
-    }
-    if (!format) {
-        SDL_InvalidParamError("format");
-        return NULL;
-    }
-
-    /* Check for empty destination palette! (results in empty image) */
-    if (format->palette != NULL) {
-        int i;
-        for (i = 0; i < format->palette->ncolors; ++i) {
-            if ((format->palette->colors[i].r != 0xFF) ||
-                (format->palette->colors[i].g != 0xFF) ||
-                (format->palette->colors[i].b != 0xFF))
-                break;
-        }
-        if (i == format->palette->ncolors) {
-            SDL_SetError("Empty destination palette");
-            return (NULL);
-        }
-    }
-
-    /* Create a new surface with the desired format */
-    convert = SDL_CreateRGBSurface(flags, surface->w, surface->h,
-                                   format->BitsPerPixel, format->Rmask,
-                                   format->Gmask, format->Bmask,
-                                   format->Amask);
-    if (convert == NULL) {
-        return (NULL);
-    }
-
-    /* Copy the palette if any */
-    if (format->palette && convert->format->palette) {
-        SDL_memcpy(convert->format->palette->colors,
-                   format->palette->colors,
-                   format->palette->ncolors * sizeof(SDL_Color));
-        convert->format->palette->ncolors = format->palette->ncolors;
-    }
-
-    /* Save the original copy flags */
-    copy_flags = surface->map->info.flags;
-    copy_color.r = surface->map->info.r;
-    copy_color.g = surface->map->info.g;
-    copy_color.b = surface->map->info.b;
-    copy_color.a = surface->map->info.a;
-    surface->map->info.r = 0xFF;
-    surface->map->info.g = 0xFF;
-    surface->map->info.b = 0xFF;
-    surface->map->info.a = 0xFF;
-    surface->map->info.flags = 0;
-    SDL_InvalidateMap(surface->map);
-
-    /* Copy over the image data */
-    bounds.x = 0;
-    bounds.y = 0;
-    bounds.w = surface->w;
-    bounds.h = surface->h;
-    SDL_LowerBlit(surface, &bounds, convert, &bounds);
-
-    /* Clean up the original surface, and update converted surface */
-    convert->map->info.r = copy_color.r;
-    convert->map->info.g = copy_color.g;
-    convert->map->info.b = copy_color.b;
-    convert->map->info.a = copy_color.a;
-    convert->map->info.flags =
-        (copy_flags &
-         ~(SDL_COPY_COLORKEY | SDL_COPY_BLEND
-           | SDL_COPY_RLE_DESIRED | SDL_COPY_RLE_COLORKEY |
-           SDL_COPY_RLE_ALPHAKEY));
-    surface->map->info.r = copy_color.r;
-    surface->map->info.g = copy_color.g;
-    surface->map->info.b = copy_color.b;
-    surface->map->info.a = copy_color.a;
-    surface->map->info.flags = copy_flags;
-    SDL_InvalidateMap(surface->map);
-    if (copy_flags & SDL_COPY_COLORKEY) {
-        SDL_bool set_colorkey_by_color = SDL_FALSE;
-
-        if (surface->format->palette) {
-            if (format->palette &&
-                surface->format->palette->ncolors <= format->palette->ncolors &&
-                (SDL_memcmp(surface->format->palette->colors, format->palette->colors,
-                  surface->format->palette->ncolors * sizeof(SDL_Color)) == 0)) {
-                /* The palette is identical, just set the same colorkey */
-                SDL_SetColorKey(convert, 1, surface->map->info.colorkey);
-            } else if (format->Amask) {
-                /* The alpha was set in the destination from the palette */
-            } else {
-                set_colorkey_by_color = SDL_TRUE;
-            }
-        } else {
-            set_colorkey_by_color = SDL_TRUE;
-        }
-
-        if (set_colorkey_by_color) {
-            SDL_Surface *tmp;
-            SDL_Surface *tmp2;
-            int converted_colorkey = 0;
-
-            /* Create a dummy surface to get the colorkey converted */
-            tmp = SDL_CreateRGBSurface(0, 1, 1,
-                                   surface->format->BitsPerPixel, surface->format->Rmask,
-                                   surface->format->Gmask, surface->format->Bmask,
-                                   surface->format->Amask);
-
-            /* Share the palette, if any */
-            if (surface->format->palette) {
-                SDL_SetSurfacePalette(tmp, surface->format->palette);
-            }
-            
-            SDL_FillRect(tmp, NULL, surface->map->info.colorkey);
-
-            tmp->map->info.flags &= ~SDL_COPY_COLORKEY;
-
-            /* Convertion of the colorkey */
-            tmp2 = SDL_ConvertSurface(tmp, format, 0);
-
-            /* Get the converted colorkey */
-            SDL_memcpy(&converted_colorkey, tmp2->pixels, tmp2->format->BytesPerPixel);
-
-            SDL_FreeSurface(tmp);
-            SDL_FreeSurface(tmp2);
-
-            /* Set the converted colorkey on the new surface */
-            SDL_SetColorKey(convert, 1, converted_colorkey);
-
-            /* This is needed when converting for 3D texture upload */
-            SDL_ConvertColorkeyToAlpha(convert);
-        }
-    }
-    SDL_SetClipRect(convert, &surface->clip_rect);
-
-    /* Enable alpha blending by default if the new surface has an
-     * alpha channel or alpha modulation */
-    if ((surface->format->Amask && format->Amask) ||
-        (copy_flags & SDL_COPY_MODULATE_ALPHA)) {
-        SDL_SetSurfaceBlendMode(convert, SDL_BLENDMODE_BLEND);
-    }
-    if ((copy_flags & SDL_COPY_RLE_DESIRED) || (flags & SDL_RLEACCEL)) {
-        SDL_SetSurfaceRLE(convert, SDL_RLEACCEL);
-    }
-
-    /* We're ready to go! */
-    return (convert);
-}
-
-SDL_Surface *
-SDL_ConvertSurfaceFormat(SDL_Surface * surface, Uint32 pixel_format,
-                         Uint32 flags)
-{
-    SDL_PixelFormat *fmt;
-    SDL_Surface *convert = NULL;
-
-    fmt = SDL_AllocFormat(pixel_format);
-    if (fmt) {
-        convert = SDL_ConvertSurface(surface, fmt, flags);
-        SDL_FreeFormat(fmt);
-    }
-    return convert;
-}
-
-/*
- * Create a surface on the stack for quick blit operations
- */
-static SDL_INLINE SDL_bool
-SDL_CreateSurfaceOnStack(int width, int height, Uint32 pixel_format,
-                         void * pixels, int pitch, SDL_Surface * surface,
-                         SDL_PixelFormat * format, SDL_BlitMap * blitmap)
-{
-    if (SDL_ISPIXELFORMAT_INDEXED(pixel_format)) {
-        SDL_SetError("Indexed pixel formats not supported");
-        return SDL_FALSE;
-    }
-    if (SDL_InitFormat(format, pixel_format) < 0) {
-        return SDL_FALSE;
-    }
-
-    SDL_zerop(surface);
-    surface->flags = SDL_PREALLOC;
-    surface->format = format;
-    surface->pixels = pixels;
-    surface->w = width;
-    surface->h = height;
-    surface->pitch = pitch;
-    /* We don't actually need to set up the clip rect for our purposes */
-    /* SDL_SetClipRect(surface, NULL); */
-
-    /* Allocate an empty mapping */
-    SDL_zerop(blitmap);
-    blitmap->info.r = 0xFF;
-    blitmap->info.g = 0xFF;
-    blitmap->info.b = 0xFF;
-    blitmap->info.a = 0xFF;
-    surface->map = blitmap;
-
-    /* The surface is ready to go */
-    surface->refcount = 1;
-    return SDL_TRUE;
-}
-
-/*
- * Copy a block of pixels of one format to another format
- */
-int SDL_ConvertPixels(int width, int height,
-                      Uint32 src_format, const void * src, int src_pitch,
-                      Uint32 dst_format, void * dst, int dst_pitch)
-{
-    SDL_Surface src_surface, dst_surface;
-    SDL_PixelFormat src_fmt, dst_fmt;
-    SDL_BlitMap src_blitmap, dst_blitmap;
-    SDL_Rect rect;
-    void *nonconst_src = (void *) src;
-
-    /* Check to make sure we are blitting somewhere, so we don't crash */
-    if (!dst) {
-        return SDL_InvalidParamError("dst");
-    }
-    if (!dst_pitch) {
-        return SDL_InvalidParamError("dst_pitch");
-    }
-
-    if (SDL_ISPIXELFORMAT_FOURCC(src_format) && SDL_ISPIXELFORMAT_FOURCC(dst_format)) {
-        return SDL_ConvertPixels_YUV_to_YUV(width, height, src_format, src, src_pitch, dst_format, dst, dst_pitch);
-    } else if (SDL_ISPIXELFORMAT_FOURCC(src_format)) {
-        return SDL_ConvertPixels_YUV_to_RGB(width, height, src_format, src, src_pitch, dst_format, dst, dst_pitch);
-    } else if (SDL_ISPIXELFORMAT_FOURCC(dst_format)) {
-        return SDL_ConvertPixels_RGB_to_YUV(width, height, src_format, src, src_pitch, dst_format, dst, dst_pitch);
-    }
-
-    /* Fast path for same format copy */
-    if (src_format == dst_format) {
-        int i;
-        const int bpp = SDL_BYTESPERPIXEL(src_format);
-        width *= bpp;
-        for (i = height; i--;) {
-            SDL_memcpy(dst, src, width);
-            src = (const Uint8*)src + src_pitch;
-            dst = (Uint8*)dst + dst_pitch;
-        }
-        return 0;
-    }
-
-    if (!SDL_CreateSurfaceOnStack(width, height, src_format, nonconst_src,
-                                  src_pitch,
-                                  &src_surface, &src_fmt, &src_blitmap)) {
-        return -1;
-    }
-    if (!SDL_CreateSurfaceOnStack(width, height, dst_format, dst, dst_pitch,
-                                  &dst_surface, &dst_fmt, &dst_blitmap)) {
-        return -1;
-    }
-
-    /* Set up the rect and go! */
-    rect.x = 0;
-    rect.y = 0;
-    rect.w = width;
-    rect.h = height;
-    return SDL_LowerBlit(&src_surface, &rect, &dst_surface, &rect);
-}
-
-/*
- * Free a surface created by the above function.
- */
-void
-SDL_FreeSurface(SDL_Surface * surface)
-{
-    if (surface == NULL) {
-        return;
-    }
-    if (surface->flags & SDL_DONTFREE) {
-        return;
-    }
-    SDL_InvalidateMap(surface->map);
-
-    if (--surface->refcount > 0) {
-        return;
-    }
-    while (surface->locked > 0) {
-        SDL_UnlockSurface(surface);
-    }
-    if (surface->flags & SDL_RLEACCEL) {
-        SDL_UnRLESurface(surface, 0);
-    }
-    if (surface->format) {
-        SDL_SetSurfacePalette(surface, NULL);
-        SDL_FreeFormat(surface->format);
-        surface->format = NULL;
-    }
-    if (!(surface->flags & SDL_PREALLOC)) {
-        SDL_free(surface->pixels);
-    }
-    if (surface->map) {
-        SDL_FreeBlitMap(surface->map);
-    }
-    SDL_free(surface);
-}
-
-/* vi: set ts=4 sw=4 expandtab: */