Skip to content
This repository has been archived by the owner on Feb 11, 2021. It is now read-only.

Commit

Permalink
More work in progress, still doesn't compile...
Browse files Browse the repository at this point in the history
  • Loading branch information
@slouken
slouken committed Aug 17, 2007
1 parent ac8654a commit 562a864
Show file tree
Hide file tree
Showing 5 changed files with 205 additions and 203 deletions.
45 changes: 23 additions & 22 deletions src/video/SDL_blit.c
View file
Expand Up @@ -24,6 +24,7 @@
#include "SDL_video.h"
#include "SDL_sysvideo.h"
#include "SDL_blit.h"
#include "SDL_blit_auto.h"
#include "SDL_blit_copy.h"
#include "SDL_RLEaccel_c.h"
#include "SDL_pixels_c.h"
Expand Down Expand Up @@ -61,19 +62,20 @@ SDL_SoftBlit(SDL_Surface * src, SDL_Rect * srcrect,

/* Set up source and destination buffer pointers, and BLIT! */
if (okay && srcrect->w && srcrect->h) {
SDL_BlitFunc RunBlit;
SDL_BlitInfo *info = &src->map->info;

/* Set up the blit information */
info->src = (Uint8 *) src->pixels +
(Uint16) srcrect->y * src->pitch +
(Uint16) srcrect->x * info->src_fmt->BytesPerPixel;
info.src_w = srcrect->w;
info.src_h = srcrect->h;
info.dst = (Uint8 *) dst->pixels +
info->src_w = srcrect->w;
info->src_h = srcrect->h;
info->dst = (Uint8 *) dst->pixels +
(Uint16) dstrect->y * dst->pitch +
(Uint16) dstrect->x * info->dst_fmt->BytesPerPixel;
info.dst_w = dstrect->w;
info.dst_h = dstrect->h;
info->dst_w = dstrect->w;
info->dst_h = dstrect->h;
RunBlit = (SDL_BlitFunc) src->map->data;

/* Run the actual software blit */
Expand Down Expand Up @@ -117,7 +119,7 @@ SDL_UseAltivecPrefetch()
#endif /* __MACOSX__ */

static SDL_BlitFunc
SDL_ChooseBlitFunc(Uint32 src_format, Uint32 dst_format, int flags, SDL_BlitEntry * entries)
SDL_ChooseBlitFunc(Uint32 src_format, Uint32 dst_format, int flags, SDL_BlitFuncEntry * entries)
{
int i;
static Uint32 features = 0xffffffff;
Expand Down Expand Up @@ -154,7 +156,7 @@ SDL_ChooseBlitFunc(Uint32 src_format, Uint32 dst_format, int flags, SDL_BlitEntr
}
}

for (i = 0; entries[i].blit; ++i) {
for (i = 0; entries[i].func; ++i) {
if (src_format != entries[i].src_format) {
continue;
}
Expand All @@ -177,44 +179,43 @@ int
SDL_CalculateBlit(SDL_Surface * surface)
{
SDL_BlitFunc blit = NULL;
int blit_index;
SDL_Surface *dst = surface->map->dst;
Uint32 src_format;
Uint32 dst_format;

/* Clean everything out to start */
if ((surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL) {
SDL_UnRLESurface(surface, 1);
}
surface->map->blit = NULL;
surface->map->info.src_fmt = surface->format;
surface->map->info.src_pitch = surface->pitch;
surface->map->info.dst_fmt = dst->format;
surface->map->info.dst_pitch = dst->pitch;

/* Get the blit function index, based on surface mode */
/* { 0 = nothing, 1 = colorkey, 2 = alpha, 3 = colorkey+alpha } */
blit_index = 0;
blit_index |= (!!(surface->flags & SDL_SRCCOLORKEY)) << 0;
if (surface->flags & SDL_SRCALPHA
&& ((surface->map->cmod >> 24) != SDL_ALPHA_OPAQUE
|| surface->format->Amask)) {
blit_index |= 2;
}
src_format = SDL_MasksToPixelFormatEnum(surface->format->BitsPerPixel, surface->format->Rmask, surface->format->Gmask, surface->format->Bmask, surface->format->Amask);
dst_format = SDL_MasksToPixelFormatEnum(dst->format->BitsPerPixel, dst->format->Rmask, dst->format->Gmask, dst->format->Bmask, dst->format->Amask);

/* Check for special "identity" case -- copy blit */
if (surface->map->identity && blit_index == 0) {
if (surface->map->identity && !surface->map->info.flags) {
/* Handle overlapping blits on the same surface */
if (surface == surface->map->dst) {
if (surface == dst) {
blit = SDL_BlitCopyOverlap;
} else {
blit = SDL_BlitCopy;
}
} else {
if (surface->format->BitsPerPixel < 8) {
blit = SDL_CalculateBlit0(surface, blit_index);
blit = SDL_ChooseBlitFunc(src_format, dst_format, surface->map->info.flags, SDL_BlitFuncTable0);
} else {
switch (surface->format->BytesPerPixel) {
case 1:
blit = SDL_CalculateBlit1(surface, blit_index);
blit = SDL_ChooseBlitFunc(src_format, dst_format, surface->map->info.flags, SDL_BlitFuncTable1);
break;
case 2:
case 3:
case 4:
blit = SDL_CalculateBlitN(surface, blit_index);
blit = SDL_ChooseBlitFunc(src_format, dst_format, surface->map->info.flags, SDL_BlitFuncTableN);
break;
}
}
Expand Down
5 changes: 5 additions & 0 deletions src/video/SDL_blit.h
View file
Expand Up @@ -101,6 +101,11 @@ typedef struct SDL_BlitMap
/* Functions found in SDL_blit.c */
extern int SDL_CalculateBlit(SDL_Surface * surface);

/* Blit function tables in SDL_blit_*.c */
extern SDL_BlitFuncEntry SDL_BlitFuncTable0[];
extern SDL_BlitFuncEntry SDL_BlitFuncTable1[];
extern SDL_BlitFuncEntry SDL_BlitFuncTableN[];

/*
* Useful macros for blitting routines
*/
Expand Down

0 comments on commit 562a864

Please sign in to comment.