int
SDL_UpdateTexture(SDL_Texture * texture, const SDL_Rect * rect,
const void *pixels, int pitch)
{
SDL_Renderer *renderer;
SDL_Rect full_rect;
CHECK_TEXTURE_MAGIC(texture, -1);
if (!pixels) {
return SDL_InvalidParamError("pixels");
}
if (!pitch) {
return SDL_InvalidParamError("pitch");
}
if (!rect) {
full_rect.x = 0;
full_rect.y = 0;
full_rect.w = texture->w;
full_rect.h = texture->h;
rect = &full_rect;
}
if (texture->yuv) {
return SDL_UpdateTextureYUV(texture, rect, pixels, pitch);
} else if (texture->native) {
return SDL_UpdateTextureNative(texture, rect, pixels, pitch);
} else {
renderer = texture->renderer;
return renderer->UpdateTexture(renderer, texture, rect, pixels, pitch);
}
}
SDL_RWops *
SDL_RWFromConstMem(const void *mem, int size)
{
SDL_RWops *rwops = NULL;
if (!mem) {
SDL_InvalidParamError("mem");
return rwops;
}
if (!size) {
SDL_InvalidParamError("size");
return rwops;
}
rwops = SDL_AllocRW();
if (rwops != NULL) {
rwops->size = mem_size;
rwops->seek = mem_seek;
rwops->read = mem_read;
rwops->write = mem_writeconst;
rwops->close = mem_close;
rwops->hidden.mem.base = (Uint8 *) mem;
rwops->hidden.mem.here = rwops->hidden.mem.base;
rwops->hidden.mem.stop = rwops->hidden.mem.base + size;
rwops->type = SDL_RWOPS_MEMORY_RO;
}
return rwops;
}
/*
* 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);
}
void
SDL_AddHintCallback(const char *name, SDL_HintCallback callback, void *userdata)
{
SDL_Hint *hint;
SDL_HintWatch *entry;
const char *value;
if (!name || !*name) {
SDL_InvalidParamError("name");
return;
}
if (!callback) {
SDL_InvalidParamError("callback");
return;
}
SDL_DelHintCallback(name, callback, userdata);
entry = (SDL_HintWatch *)SDL_malloc(sizeof(*entry));
if (!entry) {
SDL_OutOfMemory();
return;
}
entry->callback = callback;
entry->userdata = userdata;
for (hint = SDL_hints; hint; hint = hint->next) {
if (SDL_strcmp(name, hint->name) == 0) {
break;
}
}
if (!hint) {
/* Need to add a hint entry for this watcher */
hint = (SDL_Hint *)SDL_malloc(sizeof(*hint));
if (!hint) {
SDL_OutOfMemory();
SDL_free(entry);
return;
}
hint->name = SDL_strdup(name);
hint->value = NULL;
hint->priority = SDL_HINT_DEFAULT;
hint->callbacks = NULL;
hint->next = SDL_hints;
SDL_hints = hint;
}
/* Add it to the callbacks for this hint */
entry->next = hint->callbacks;
hint->callbacks = entry;
/* Now call it with the current value */
value = SDL_GetHint(name);
callback(userdata, name, value, value);
}
SDL_bool
SDL_IntersectRect(const SDL_Rect * A, const SDL_Rect * B, SDL_Rect * result)
{
int Amin, Amax, Bmin, Bmax;
if (!A) {
SDL_InvalidParamError("A");
return SDL_FALSE;
}
if (!B) {
SDL_InvalidParamError("B");
return SDL_FALSE;
}
if (!result) {
SDL_InvalidParamError("result");
return SDL_FALSE;
}
/* Special cases for empty rects */
if (SDL_RectEmpty(A) || SDL_RectEmpty(B)) {
result->w = 0;
result->h = 0;
return SDL_FALSE;
}
/* Horizontal intersection */
Amin = A->x;
Amax = Amin + A->w;
Bmin = B->x;
Bmax = Bmin + B->w;
if (Bmin > Amin)
Amin = Bmin;
result->x = Amin;
if (Bmax < Amax)
Amax = Bmax;
result->w = Amax - Amin;
/* Vertical intersection */
Amin = A->y;
Amax = Amin + A->h;
Bmin = B->y;
Bmax = Bmin + B->h;
if (Bmin > Amin)
Amin = Bmin;
result->y = Amin;
if (Bmax < Amax)
Amax = Bmax;
result->h = Amax - Amin;
return !SDL_RectEmpty(result);
}
int
SDL_TLSSet(SDL_TLSID id, const void *value, void (*destructor)(void *))
{
SDL_TLSData *storage;
if (id == 0) {
return SDL_InvalidParamError("id");
}
storage = SDL_SYS_GetTLSData();
if (!storage || (id > storage->limit)) {
unsigned int i, oldlimit, newlimit;
oldlimit = storage ? storage->limit : 0;
newlimit = (id + TLS_ALLOC_CHUNKSIZE);
storage = (SDL_TLSData *)SDL_realloc(storage, sizeof(*storage)+(newlimit-1)*sizeof(storage->array[0]));
if (!storage) {
return SDL_OutOfMemory();
}
storage->limit = newlimit;
for (i = oldlimit; i < newlimit; ++i) {
storage->array[i].data = NULL;
storage->array[i].destructor = NULL;
}
if (SDL_SYS_SetTLSData(storage) != 0) {
return -1;
}
}
storage->array[id-1].data = SDL_const_cast(void*, value);
storage->array[id-1].destructor = destructor;
return 0;
}
SDL_bool
SDL_HasIntersection(const SDL_Rect * A, const SDL_Rect * B)
{
int Amin, Amax, Bmin, Bmax;
if (!A) {
SDL_InvalidParamError("A");
return SDL_FALSE;
}
if (!B) {
SDL_InvalidParamError("B");
return SDL_FALSE;
}
/* Special cases for empty rects */
if (SDL_RectEmpty(A) || SDL_RectEmpty(B)) {
return SDL_FALSE;
}
/* Horizontal intersection */
Amin = A->x;
Amax = Amin + A->w;
Bmin = B->x;
Bmax = Bmin + B->w;
if (Bmin > Amin)
Amin = Bmin;
if (Bmax < Amax)
Amax = Bmax;
if (Amax <= Amin)
return SDL_FALSE;
/* Vertical intersection */
Amin = A->y;
Amax = Amin + A->h;
Bmin = B->y;
Bmax = Bmin + B->h;
if (Bmin > Amin)
Amin = Bmin;
if (Bmax < Amax)
Amax = Bmax;
if (Amax <= Amin)
return SDL_FALSE;
return SDL_TRUE;
}
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;
}
void
X11_SetTextInputRect(_THIS, SDL_Rect *rect)
{
if (!rect) {
SDL_InvalidParamError("rect");
return;
}
#ifdef SDL_USE_IME
SDL_IME_UpdateTextRect(rect);
#endif
}
void
Android_SetTextInputRect(_THIS, SDL_Rect *rect)
{
SDL_VideoData *videodata = (SDL_VideoData *)_this->driverdata;
if (!rect) {
SDL_InvalidParamError("rect");
return;
}
videodata->textRect = *rect;
}
/* Load all the data from an SDL data stream */
void *
SDL_LoadFile_RW(SDL_RWops * src, size_t *datasize, int freesrc)
{
const int FILE_CHUNK_SIZE = 1024;
Sint64 size;
size_t size_read, size_total;
void *data = NULL, *newdata;
if (!src) {
SDL_InvalidParamError("src");
return NULL;
}
size = SDL_RWsize(src);
if (size < 0) {
size = FILE_CHUNK_SIZE;
}
data = SDL_malloc((size_t)(size + 1));
size_total = 0;
for (;;) {
if ((((Sint64)size_total) + FILE_CHUNK_SIZE) > size) {
size = (size_total + FILE_CHUNK_SIZE);
newdata = SDL_realloc(data, (size_t)(size + 1));
if (!newdata) {
SDL_free(data);
data = NULL;
SDL_OutOfMemory();
goto done;
}
data = newdata;
}
size_read = SDL_RWread(src, (char *)data+size_total, 1, (size_t)(size-size_total));
if (size_read == 0) {
break;
}
size_total += size_read;
}
if (datasize) {
*datasize = size_total;
}
((char *)data)[size_total] = '\0';
done:
if (freesrc && src) {
SDL_RWclose(src);
}
return data;
}
/*
* Add or update an entry into the Mappings Database with a priority
*/
static int
SDL_PrivateGameControllerAddMapping(const char *mappingString, SDL_ControllerMappingPriority priority)
{
char *pchGUID;
SDL_JoystickGUID jGUID;
SDL_bool is_xinput_mapping = SDL_FALSE;
SDL_bool is_emscripten_mapping = SDL_FALSE;
SDL_bool existing = SDL_FALSE;
ControllerMapping_t *pControllerMapping;
if (!mappingString) {
return SDL_InvalidParamError("mappingString");
}
pchGUID = SDL_PrivateGetControllerGUIDFromMappingString(mappingString);
if (!pchGUID) {
return SDL_SetError("Couldn't parse GUID from %s", mappingString);
}
if (!SDL_strcasecmp(pchGUID, "xinput")) {
is_xinput_mapping = SDL_TRUE;
}
if (!SDL_strcasecmp(pchGUID, "emscripten")) {
is_emscripten_mapping = SDL_TRUE;
}
jGUID = SDL_JoystickGetGUIDFromString(pchGUID);
SDL_free(pchGUID);
pControllerMapping = SDL_PrivateAddMappingForGUID(jGUID, mappingString, &existing, priority);
if (!pControllerMapping) {
return -1;
}
if (existing) {
return 0;
} else {
if (is_xinput_mapping) {
s_pXInputMapping = pControllerMapping;
}
if (is_emscripten_mapping) {
s_pEmscriptenMapping = pControllerMapping;
}
return 1;
}
}
/*
* 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 bliting somewhere, so we don't crash */
if (!dst) {
return SDL_InvalidParamError("dst");
}
if (!dst_pitch) {
return SDL_InvalidParamError("dst_pitch");
}
/* Fast path for same format copy */
if (src_format == dst_format) {
int bpp;
if (SDL_ISPIXELFORMAT_FOURCC(src_format)) {
switch (src_format) {
case SDL_PIXELFORMAT_YV12:
case SDL_PIXELFORMAT_IYUV:
case SDL_PIXELFORMAT_YUY2:
case SDL_PIXELFORMAT_UYVY:
case SDL_PIXELFORMAT_YVYU:
bpp = 2;
break;
default:
return SDL_SetError("Unknown FOURCC pixel format");
}
} else {
bpp = SDL_BYTESPERPIXEL(src_format);
}
width *= bpp;
while (height-- > 0) {
SDL_memcpy(dst, src, width);
src = (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);
}
/*
* 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_bool
SDL_DXGIGetOutputInfo(int displayIndex, int *adapterIndex, int *outputIndex)
{
#if !HAVE_DXGI_H
if (adapterIndex) *adapterIndex = -1;
if (outputIndex) *outputIndex = -1;
SDL_SetError("SDL was compiled without DXGI support due to missing dxgi.h header");
return SDL_FALSE;
#else
SDL_DisplayData *pData = (SDL_DisplayData *)SDL_GetDisplayDriverData(displayIndex);
void *pDXGIDLL;
char *displayName;
int nAdapter, nOutput;
IDXGIFactory *pDXGIFactory;
IDXGIAdapter *pDXGIAdapter;
IDXGIOutput* pDXGIOutput;
if (!adapterIndex) {
SDL_InvalidParamError("adapterIndex");
return SDL_FALSE;
}
if (!outputIndex) {
SDL_InvalidParamError("outputIndex");
return SDL_FALSE;
}
*adapterIndex = -1;
*outputIndex = -1;
if (!pData) {
SDL_SetError("Invalid display index");
return SDL_FALSE;
}
if (!DXGI_LoadDLL(&pDXGIDLL, &pDXGIFactory)) {
SDL_SetError("Unable to create DXGI interface");
return SDL_FALSE;
}
displayName = WIN_StringToUTF8(pData->DeviceName);
nAdapter = 0;
while (*adapterIndex == -1 && SUCCEEDED(IDXGIFactory_EnumAdapters(pDXGIFactory, nAdapter, &pDXGIAdapter))) {
nOutput = 0;
while (*adapterIndex == -1 && SUCCEEDED(IDXGIAdapter_EnumOutputs(pDXGIAdapter, nOutput, &pDXGIOutput))) {
DXGI_OUTPUT_DESC outputDesc;
if (SUCCEEDED(IDXGIOutput_GetDesc(pDXGIOutput, &outputDesc))) {
char *outputName = WIN_StringToUTF8(outputDesc.DeviceName);
if (SDL_strcmp(outputName, displayName) == 0) {
*adapterIndex = nAdapter;
*outputIndex = nOutput;
}
SDL_free(outputName);
}
IDXGIOutput_Release(pDXGIOutput);
nOutput++;
}
IDXGIAdapter_Release(pDXGIAdapter);
nAdapter++;
}
SDL_free(displayName);
/* free up the DXGI factory */
IDXGIFactory_Release(pDXGIFactory);
SDL_UnloadObject(pDXGIDLL);
if (*adapterIndex == -1) {
return SDL_FALSE;
} else {
return SDL_TRUE;
}
#endif
}
void
SDL_UnionRect(const SDL_Rect * A, const SDL_Rect * B, SDL_Rect * result)
{
int Amin, Amax, Bmin, Bmax;
if (!A) {
SDL_InvalidParamError("A");
return;
}
if (!B) {
SDL_InvalidParamError("B");
return;
}
if (!result) {
SDL_InvalidParamError("result");
return;
}
/* Special cases for empty Rects */
if (SDL_RectEmpty(A)) {
if (SDL_RectEmpty(B)) {
/* A and B empty */
return;
} else {
/* A empty, B not empty */
*result = *B;
return;
}
} else {
if (SDL_RectEmpty(B)) {
/* A not empty, B empty */
*result = *A;
return;
}
}
/* Horizontal union */
Amin = A->x;
Amax = Amin + A->w;
Bmin = B->x;
Bmax = Bmin + B->w;
if (Bmin < Amin)
Amin = Bmin;
result->x = Amin;
if (Bmax > Amax)
Amax = Bmax;
result->w = Amax - Amin;
/* Vertical union */
Amin = A->y;
Amax = Amin + A->h;
Bmin = B->y;
Bmax = Bmin + B->h;
if (Bmin < Amin)
Amin = Bmin;
result->y = Amin;
if (Bmax > Amax)
Amax = Bmax;
result->h = Amax - Amin;
}
/*
* Add or update an entry into the Mappings Database
*/
int
SDL_GameControllerAddMapping(const char *mappingString)
{
char *pchGUID;
char *pchName;
char *pchMapping;
SDL_JoystickGUID jGUID;
ControllerMapping_t *pControllerMapping;
SDL_bool is_xinput_mapping = SDL_FALSE;
SDL_bool is_emscripten_mapping = SDL_FALSE;
if (!mappingString) {
return SDL_InvalidParamError("mappingString");
}
pchGUID = SDL_PrivateGetControllerGUIDFromMappingString(mappingString);
if (!pchGUID) {
return SDL_SetError("Couldn't parse GUID from %s", mappingString);
}
if (!SDL_strcasecmp(pchGUID, "xinput")) {
is_xinput_mapping = SDL_TRUE;
}
if (!SDL_strcasecmp(pchGUID, "emscripten")) {
is_emscripten_mapping = SDL_TRUE;
}
jGUID = SDL_JoystickGetGUIDFromString(pchGUID);
SDL_free(pchGUID);
pchName = SDL_PrivateGetControllerNameFromMappingString(mappingString);
if (!pchName) {
return SDL_SetError("Couldn't parse name from %s", mappingString);
}
pchMapping = SDL_PrivateGetControllerMappingFromMappingString(mappingString);
if (!pchMapping) {
SDL_free(pchName);
return SDL_SetError("Couldn't parse %s", mappingString);
}
pControllerMapping = SDL_PrivateGetControllerMappingForGUID(&jGUID);
if (pControllerMapping) {
/* Update existing mapping */
SDL_free(pControllerMapping->name);
pControllerMapping->name = pchName;
SDL_free(pControllerMapping->mapping);
pControllerMapping->mapping = pchMapping;
/* refresh open controllers */
SDL_PrivateGameControllerRefreshMapping(pControllerMapping);
return 0;
} else {
pControllerMapping = SDL_malloc(sizeof(*pControllerMapping));
if (!pControllerMapping) {
SDL_free(pchName);
SDL_free(pchMapping);
return SDL_OutOfMemory();
}
if (is_xinput_mapping) {
s_pXInputMapping = pControllerMapping;
}
if (is_emscripten_mapping) {
s_pEmscriptenMapping = pControllerMapping;
}
pControllerMapping->guid = jGUID;
pControllerMapping->name = pchName;
pControllerMapping->mapping = pchMapping;
pControllerMapping->next = s_pSupportedControllers;
s_pSupportedControllers = pControllerMapping;
return 1;
}
}
SDL_bool
SDL_EnclosePoints(const SDL_Point * points, int count, const SDL_Rect * clip,
SDL_Rect * result)
{
int minx = 0;
int miny = 0;
int maxx = 0;
int maxy = 0;
int x, y, i;
if (!points) {
SDL_InvalidParamError("points");
return SDL_FALSE;
}
if (count < 1) {
SDL_InvalidParamError("count");
return SDL_FALSE;
}
if (clip) {
SDL_bool added = SDL_FALSE;
const int clip_minx = clip->x;
const int clip_miny = clip->y;
const int clip_maxx = clip->x+clip->w-1;
const int clip_maxy = clip->y+clip->h-1;
/* Special case for empty rectangle */
if (SDL_RectEmpty(clip)) {
return SDL_FALSE;
}
for (i = 0; i < count; ++i) {
x = points[i].x;
y = points[i].y;
if (x < clip_minx || x > clip_maxx ||
y < clip_miny || y > clip_maxy) {
continue;
}
if (!added) {
/* Special case: if no result was requested, we are done */
if (result == NULL) {
return SDL_TRUE;
}
/* First point added */
minx = maxx = x;
miny = maxy = y;
added = SDL_TRUE;
continue;
}
if (x < minx) {
minx = x;
} else if (x > maxx) {
maxx = x;
}
if (y < miny) {
miny = y;
} else if (y > maxy) {
maxy = y;
}
}
if (!added) {
return SDL_FALSE;
}
} else {
/* Special case: if no result was requested, we are done */
if (result == NULL) {
return SDL_TRUE;
}
/* No clipping, always add the first point */
minx = maxx = points[0].x;
miny = maxy = points[0].y;
for (i = 1; i < count; ++i) {
x = points[i].x;
y = points[i].y;
if (x < minx) {
minx = x;
} else if (x > maxx) {
maxx = x;
}
if (y < miny) {
miny = y;
} else if (y > maxy) {
maxy = y;
}
}
}
if (result) {
result->x = minx;
result->y = miny;
result->w = (maxx-minx)+1;
result->h = (maxy-miny)+1;
}
return SDL_TRUE;
}
SDL_bool
SDL_IntersectRectAndLine(const SDL_Rect * rect, int *X1, int *Y1, int *X2,
int *Y2)
{
int x = 0;
int y = 0;
int x1, y1;
int x2, y2;
int rectx1;
int recty1;
int rectx2;
int recty2;
int outcode1, outcode2;
if (!rect) {
SDL_InvalidParamError("rect");
return SDL_FALSE;
}
if (!X1) {
SDL_InvalidParamError("X1");
return SDL_FALSE;
}
if (!Y1) {
SDL_InvalidParamError("Y1");
return SDL_FALSE;
}
if (!X2) {
SDL_InvalidParamError("X2");
return SDL_FALSE;
}
if (!Y2) {
SDL_InvalidParamError("Y2");
return SDL_FALSE;
}
/* Special case for empty rect */
if (SDL_RectEmpty(rect)) {
return SDL_FALSE;
}
x1 = *X1;
y1 = *Y1;
x2 = *X2;
y2 = *Y2;
rectx1 = rect->x;
recty1 = rect->y;
rectx2 = rect->x + rect->w - 1;
recty2 = rect->y + rect->h - 1;
/* Check to see if entire line is inside rect */
if (x1 >= rectx1 && x1 <= rectx2 && x2 >= rectx1 && x2 <= rectx2 &&
y1 >= recty1 && y1 <= recty2 && y2 >= recty1 && y2 <= recty2) {
return SDL_TRUE;
}
/* Check to see if entire line is to one side of rect */
if ((x1 < rectx1 && x2 < rectx1) || (x1 > rectx2 && x2 > rectx2) ||
(y1 < recty1 && y2 < recty1) || (y1 > recty2 && y2 > recty2)) {
return SDL_FALSE;
}
if (y1 == y2) {
/* Horizontal line, easy to clip */
if (x1 < rectx1) {
*X1 = rectx1;
} else if (x1 > rectx2) {
*X1 = rectx2;
}
if (x2 < rectx1) {
*X2 = rectx1;
} else if (x2 > rectx2) {
*X2 = rectx2;
}
return SDL_TRUE;
}
if (x1 == x2) {
/* Vertical line, easy to clip */
if (y1 < recty1) {
*Y1 = recty1;
} else if (y1 > recty2) {
*Y1 = recty2;
}
if (y2 < recty1) {
*Y2 = recty1;
} else if (y2 > recty2) {
*Y2 = recty2;
}
return SDL_TRUE;
}
/* More complicated Cohen-Sutherland algorithm */
outcode1 = ComputeOutCode(rect, x1, y1);
outcode2 = ComputeOutCode(rect, x2, y2);
while (outcode1 || outcode2) {
if (outcode1 & outcode2) {
return SDL_FALSE;
}
if (outcode1) {
if (outcode1 & CODE_TOP) {
y = recty1;
x = x1 + ((x2 - x1) * (y - y1)) / (y2 - y1);
} else if (outcode1 & CODE_BOTTOM) {
y = recty2;
x = x1 + ((x2 - x1) * (y - y1)) / (y2 - y1);
} else if (outcode1 & CODE_LEFT) {
x = rectx1;
y = y1 + ((y2 - y1) * (x - x1)) / (x2 - x1);
} else if (outcode1 & CODE_RIGHT) {
x = rectx2;
y = y1 + ((y2 - y1) * (x - x1)) / (x2 - x1);
}
x1 = x;
y1 = y;
outcode1 = ComputeOutCode(rect, x, y);
} else {
if (outcode2 & CODE_TOP) {
y = recty1;
x = x1 + ((x2 - x1) * (y - y1)) / (y2 - y1);
} else if (outcode2 & CODE_BOTTOM) {
y = recty2;
x = x1 + ((x2 - x1) * (y - y1)) / (y2 - y1);
} else if (outcode2 & CODE_LEFT) {
x = rectx1;
y = y1 + ((y2 - y1) * (x - x1)) / (x2 - x1);
} else if (outcode2 & CODE_RIGHT) {
x = rectx2;
y = y1 + ((y2 - y1) * (x - x1)) / (x2 - x1);
}
x2 = x;
y2 = y;
outcode2 = ComputeOutCode(rect, x, y);
}
}
*X1 = x1;
*Y1 = y1;
*X2 = x2;
*Y2 = y2;
return SDL_TRUE;
}
int
SDL_WriteToDataQueue(SDL_DataQueue *queue, const void *_data, const size_t _len)
{
size_t len = _len;
const Uint8 *data = (const Uint8 *) _data;
const size_t packet_size = queue ? queue->packet_size : 0;
SDL_DataQueuePacket *orighead;
SDL_DataQueuePacket *origtail;
size_t origlen;
size_t datalen;
if (!queue) {
return SDL_InvalidParamError("queue");
}
orighead = queue->head;
origtail = queue->tail;
origlen = origtail ? origtail->datalen : 0;
while (len > 0) {
SDL_DataQueuePacket *packet = queue->tail;
SDL_assert(!packet || (packet->datalen <= packet_size));
if (!packet || (packet->datalen >= packet_size)) {
/* tail packet missing or completely full; we need a new packet. */
packet = queue->pool;
if (packet != NULL) {
/* we have one available in the pool. */
queue->pool = packet->next;
} else {
/* Have to allocate a new one! */
packet = (SDL_DataQueuePacket *) SDL_malloc(sizeof (SDL_DataQueuePacket) + packet_size);
if (packet == NULL) {
/* uhoh, reset so we've queued nothing new, free what we can. */
if (!origtail) {
packet = queue->head; /* whole queue. */
} else {
packet = origtail->next; /* what we added to existing queue. */
origtail->next = NULL;
origtail->datalen = origlen;
}
queue->head = orighead;
queue->tail = origtail;
queue->pool = NULL;
SDL_FreeDataQueueList(packet); /* give back what we can. */
return SDL_OutOfMemory();
}
}
packet->datalen = 0;
packet->startpos = 0;
packet->next = NULL;
SDL_assert((queue->head != NULL) == (queue->queued_bytes != 0));
if (queue->tail == NULL) {
queue->head = packet;
} else {
queue->tail->next = packet;
}
queue->tail = packet;
}
datalen = SDL_min(len, packet_size - packet->datalen);
SDL_memcpy(packet->data + packet->datalen, data, datalen);
data += datalen;
len -= datalen;
packet->datalen += datalen;
queue->queued_bytes += datalen;
}
return 0;
}
SDL_bool
SDL_GetSpanEnclosingRect(int width, int height,
int numrects, const SDL_Rect * rects, SDL_Rect *span)
{
int i;
int span_y1, span_y2;
int rect_y1, rect_y2;
if (width < 1) {
SDL_InvalidParamError("width");
return SDL_FALSE;
}
if (height < 1) {
SDL_InvalidParamError("height");
return SDL_FALSE;
}
if (!rects) {
SDL_InvalidParamError("rects");
return SDL_FALSE;
}
if (!span) {
SDL_InvalidParamError("span");
return SDL_FALSE;
}
if (numrects < 1) {
SDL_InvalidParamError("numrects");
return SDL_FALSE;
}
/* Initialize to empty rect */
span_y1 = height;
span_y2 = 0;
for (i = 0; i < numrects; ++i) {
rect_y1 = rects[i].y;
rect_y2 = rect_y1 + rects[i].h;
/* Clip out of bounds rectangles, and expand span rect */
if (rect_y1 < 0) {
span_y1 = 0;
} else if (rect_y1 < span_y1) {
span_y1 = rect_y1;
}
if (rect_y2 > height) {
span_y2 = height;
} else if (rect_y2 > span_y2) {
span_y2 = rect_y2;
}
}
if (span_y2 > span_y1) {
span->x = 0;
span->y = span_y1;
span->w = width;
span->h = (span_y2 - span_y1);
return SDL_TRUE;
}
return SDL_FALSE;
}
