/*
* 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)
{
SDL_VideoDevice *video = current_video;
SDL_VideoDevice *this = current_video;
SDL_Surface *screen;
SDL_Surface *surface;
/* Make sure the size requested doesn't overflow our datatypes */
/* Next time I write a library like SDL, I'll use int for size. :) */
if ( width > 16384 || height > 16384 ) {
SDL_SetError("Width or height is too large");
return(NULL);
}
/* Check to see if we desire the surface in video memory */
if ( video ) {
screen = SDL_PublicSurface;
} else {
screen = NULL;
}
if ( screen && ((screen->flags&SDL_HWSURFACE) == SDL_HWSURFACE) ) {
if ( (flags&(SDL_SRCCOLORKEY|SDL_SRCALPHA)) != 0 ) {
flags |= SDL_HWSURFACE;
}
if ( (flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
if ( ! current_video->info.blit_hw_CC ) {
flags &= ~SDL_HWSURFACE;
}
}
if ( (flags & SDL_SRCALPHA) == SDL_SRCALPHA ) {
if ( ! current_video->info.blit_hw_A ) {
flags &= ~SDL_HWSURFACE;
}
}
} else {
flags &= ~SDL_HWSURFACE;
}
/* Allocate the surface */
surface = (SDL_Surface *)malloc(sizeof(*surface));
if ( surface == NULL ) {
SDL_OutOfMemory();
return(NULL);
}
surface->flags = SDL_SWSURFACE;
if ( (flags & SDL_HWSURFACE) == SDL_HWSURFACE ) {
depth = screen->format->BitsPerPixel;
Rmask = screen->format->Rmask;
Gmask = screen->format->Gmask;
Bmask = screen->format->Bmask;
Amask = screen->format->Amask;
}
surface->format = SDL_AllocFormat(depth, Rmask, Gmask, Bmask, Amask);
if ( surface->format == NULL ) {
free(surface);
return(NULL);
}
if ( Amask ) {
surface->flags |= SDL_SRCALPHA;
}
surface->w = width;
surface->h = height;
surface->pitch = SDL_CalculatePitch(surface);
surface->pixels = NULL;
surface->offset = 0;
surface->hwdata = NULL;
surface->locked = 0;
surface->map = NULL;
surface->unused1 = 0;
SDL_SetClipRect(surface, NULL);
SDL_FormatChanged(surface);
/* Get the pixels */
if ( ((flags&SDL_HWSURFACE) == SDL_SWSURFACE) ||
(video->AllocHWSurface(this, surface) < 0) ) {
if ( surface->w && surface->h ) {
surface->pixels = malloc(surface->h*surface->pitch);
if ( surface->pixels == NULL ) {
SDL_FreeSurface(surface);
SDL_OutOfMemory();
return(NULL);
}
/* This is important for bitmaps */
memset(surface->pixels, 0, surface->h*surface->pitch);
}
}
/* Allocate an empty mapping */
surface->map = SDL_AllocBlitMap();
if ( surface->map == NULL ) {
SDL_FreeSurface(surface);
return(NULL);
}
/* The surface is ready to go */
surface->refcount = 1;
#ifdef CHECK_LEAKS
++surfaces_allocated;
#endif
return(surface);
}
/*
* 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)
{
SDL_Surface *surface;
Uint32 format;
/* The flags are no longer used, make the compiler happy */
(void)flags;
/* Get the pixel format */
format = SDL_MasksToPixelFormatEnum(depth, Rmask, Gmask, Bmask, Amask);
if (format == SDL_PIXELFORMAT_UNKNOWN) {
SDL_SetError("Unknown pixel format");
return NULL;
}
/* 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(surface);
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) {
surface->pixels = SDL_malloc(surface->h * surface->pitch);
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 (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)
{
SDL_Surface *surface;
/* Make sure the size requested doesn't overflow our datatypes */
/* Next time I write a library like SDL, I'll use int for size. :) */
if ( width >= 16384 || height >= 65536 ) {
SDL_SetError("Width or height is too large");
return(NULL);
}
flags &= ~SDL_HWSURFACE;
/* Allocate the surface */
surface = (SDL_Surface *)SDL_malloc(sizeof(*surface));
if (!surface)
{
SDL_OutOfMemory();
return(NULL);
}
surface->flags = SDL_SWSURFACE;
surface->format = SDL_AllocFormat(depth, Rmask, Gmask, Bmask, Amask);
if (!surface->format)
{
SDL_free(surface);
return(NULL);
}
if (Amask)
surface->flags |= SDL_SRCALPHA;
surface->w = width;
surface->h = height;
surface->pitch = SDL_CalculatePitch(surface);
surface->pixels = NULL;
surface->offset = 0;
surface->hwdata = NULL;
surface->locked = 0;
surface->map = NULL;
surface->unused1 = 0;
SDL_SetClipRect(surface, NULL);
SDL_FormatChanged(surface);
/* Get the pixels */
if ( ((flags&SDL_HWSURFACE) == SDL_SWSURFACE))
{
if ( surface->w && surface->h )
{
surface->pixels = SDL_malloc(surface->h*surface->pitch);
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);
}
/* The surface is ready to go */
surface->refcount = 1;
return(surface);
}
