mirror of
https://github.com/Ryujinx/SDL.git
synced 2024-09-23 07:28:35 +02:00
24c86b5501
since the window system doesn't do it for us like other platforms. This prevents sticky keys and missed keys when going in and out of focus, for example Alt would appear to stick if switching away from an SDL app with Alt-Tab and had to be pressed again. CR: Sam
551 lines
12 KiB
C
551 lines
12 KiB
C
/*
|
|
Simple DirectMedia Layer
|
|
Copyright (C) 1997-2014 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_blit.h"
|
|
#include "SDL_sysvideo.h"
|
|
#include "SDL_endian.h"
|
|
|
|
/* Functions to blit from 8-bit surfaces to other surfaces */
|
|
|
|
static void
|
|
Blit1to1(SDL_BlitInfo * info)
|
|
{
|
|
#ifndef USE_DUFFS_LOOP
|
|
int c;
|
|
#endif
|
|
int width, height;
|
|
Uint8 *src, *map, *dst;
|
|
int srcskip, dstskip;
|
|
|
|
/* Set up some basic variables */
|
|
width = info->dst_w;
|
|
height = info->dst_h;
|
|
src = info->src;
|
|
srcskip = info->src_skip;
|
|
dst = info->dst;
|
|
dstskip = info->dst_skip;
|
|
map = info->table;
|
|
|
|
while (height--) {
|
|
#ifdef USE_DUFFS_LOOP
|
|
/* *INDENT-OFF* */
|
|
DUFFS_LOOP(
|
|
{
|
|
*dst = map[*src];
|
|
}
|
|
dst++;
|
|
src++;
|
|
, width);
|
|
/* *INDENT-ON* */
|
|
#else
|
|
for (c = width; c; --c) {
|
|
*dst = map[*src];
|
|
dst++;
|
|
src++;
|
|
}
|
|
#endif
|
|
src += srcskip;
|
|
dst += dstskip;
|
|
}
|
|
}
|
|
|
|
/* This is now endian dependent */
|
|
#if ( SDL_BYTEORDER == SDL_LIL_ENDIAN )
|
|
#define HI 1
|
|
#define LO 0
|
|
#else /* ( SDL_BYTEORDER == SDL_BIG_ENDIAN ) */
|
|
#define HI 0
|
|
#define LO 1
|
|
#endif
|
|
static void
|
|
Blit1to2(SDL_BlitInfo * info)
|
|
{
|
|
#ifndef USE_DUFFS_LOOP
|
|
int c;
|
|
#endif
|
|
int width, height;
|
|
Uint8 *src, *dst;
|
|
Uint16 *map;
|
|
int srcskip, dstskip;
|
|
|
|
/* Set up some basic variables */
|
|
width = info->dst_w;
|
|
height = info->dst_h;
|
|
src = info->src;
|
|
srcskip = info->src_skip;
|
|
dst = info->dst;
|
|
dstskip = info->dst_skip;
|
|
map = (Uint16 *) info->table;
|
|
|
|
#ifdef USE_DUFFS_LOOP
|
|
while (height--) {
|
|
/* *INDENT-OFF* */
|
|
DUFFS_LOOP(
|
|
{
|
|
*(Uint16 *)dst = map[*src++];
|
|
dst += 2;
|
|
},
|
|
width);
|
|
/* *INDENT-ON* */
|
|
src += srcskip;
|
|
dst += dstskip;
|
|
}
|
|
#else
|
|
/* Memory align at 4-byte boundary, if necessary */
|
|
if ((long) dst & 0x03) {
|
|
/* Don't do anything if width is 0 */
|
|
if (width == 0) {
|
|
return;
|
|
}
|
|
--width;
|
|
|
|
while (height--) {
|
|
/* Perform copy alignment */
|
|
*(Uint16 *) dst = map[*src++];
|
|
dst += 2;
|
|
|
|
/* Copy in 4 pixel chunks */
|
|
for (c = width / 4; c; --c) {
|
|
*(Uint32 *) dst = (map[src[HI]] << 16) | (map[src[LO]]);
|
|
src += 2;
|
|
dst += 4;
|
|
*(Uint32 *) dst = (map[src[HI]] << 16) | (map[src[LO]]);
|
|
src += 2;
|
|
dst += 4;
|
|
}
|
|
/* Get any leftovers */
|
|
switch (width & 3) {
|
|
case 3:
|
|
*(Uint16 *) dst = map[*src++];
|
|
dst += 2;
|
|
case 2:
|
|
*(Uint32 *) dst = (map[src[HI]] << 16) | (map[src[LO]]);
|
|
src += 2;
|
|
dst += 4;
|
|
break;
|
|
case 1:
|
|
*(Uint16 *) dst = map[*src++];
|
|
dst += 2;
|
|
break;
|
|
}
|
|
src += srcskip;
|
|
dst += dstskip;
|
|
}
|
|
} else {
|
|
while (height--) {
|
|
/* Copy in 4 pixel chunks */
|
|
for (c = width / 4; c; --c) {
|
|
*(Uint32 *) dst = (map[src[HI]] << 16) | (map[src[LO]]);
|
|
src += 2;
|
|
dst += 4;
|
|
*(Uint32 *) dst = (map[src[HI]] << 16) | (map[src[LO]]);
|
|
src += 2;
|
|
dst += 4;
|
|
}
|
|
/* Get any leftovers */
|
|
switch (width & 3) {
|
|
case 3:
|
|
*(Uint16 *) dst = map[*src++];
|
|
dst += 2;
|
|
case 2:
|
|
*(Uint32 *) dst = (map[src[HI]] << 16) | (map[src[LO]]);
|
|
src += 2;
|
|
dst += 4;
|
|
break;
|
|
case 1:
|
|
*(Uint16 *) dst = map[*src++];
|
|
dst += 2;
|
|
break;
|
|
}
|
|
src += srcskip;
|
|
dst += dstskip;
|
|
}
|
|
}
|
|
#endif /* USE_DUFFS_LOOP */
|
|
}
|
|
|
|
static void
|
|
Blit1to3(SDL_BlitInfo * info)
|
|
{
|
|
#ifndef USE_DUFFS_LOOP
|
|
int c;
|
|
#endif
|
|
int o;
|
|
int width, height;
|
|
Uint8 *src, *map, *dst;
|
|
int srcskip, dstskip;
|
|
|
|
/* Set up some basic variables */
|
|
width = info->dst_w;
|
|
height = info->dst_h;
|
|
src = info->src;
|
|
srcskip = info->src_skip;
|
|
dst = info->dst;
|
|
dstskip = info->dst_skip;
|
|
map = info->table;
|
|
|
|
while (height--) {
|
|
#ifdef USE_DUFFS_LOOP
|
|
/* *INDENT-OFF* */
|
|
DUFFS_LOOP(
|
|
{
|
|
o = *src * 4;
|
|
dst[0] = map[o++];
|
|
dst[1] = map[o++];
|
|
dst[2] = map[o++];
|
|
}
|
|
src++;
|
|
dst += 3;
|
|
, width);
|
|
/* *INDENT-ON* */
|
|
#else
|
|
for (c = width; c; --c) {
|
|
o = *src * 4;
|
|
dst[0] = map[o++];
|
|
dst[1] = map[o++];
|
|
dst[2] = map[o++];
|
|
src++;
|
|
dst += 3;
|
|
}
|
|
#endif /* USE_DUFFS_LOOP */
|
|
src += srcskip;
|
|
dst += dstskip;
|
|
}
|
|
}
|
|
|
|
static void
|
|
Blit1to4(SDL_BlitInfo * info)
|
|
{
|
|
#ifndef USE_DUFFS_LOOP
|
|
int c;
|
|
#endif
|
|
int width, height;
|
|
Uint8 *src;
|
|
Uint32 *map, *dst;
|
|
int srcskip, dstskip;
|
|
|
|
/* Set up some basic variables */
|
|
width = info->dst_w;
|
|
height = info->dst_h;
|
|
src = info->src;
|
|
srcskip = info->src_skip;
|
|
dst = (Uint32 *) info->dst;
|
|
dstskip = info->dst_skip / 4;
|
|
map = (Uint32 *) info->table;
|
|
|
|
while (height--) {
|
|
#ifdef USE_DUFFS_LOOP
|
|
/* *INDENT-OFF* */
|
|
DUFFS_LOOP(
|
|
*dst++ = map[*src++];
|
|
, width);
|
|
/* *INDENT-ON* */
|
|
#else
|
|
for (c = width / 4; c; --c) {
|
|
*dst++ = map[*src++];
|
|
*dst++ = map[*src++];
|
|
*dst++ = map[*src++];
|
|
*dst++ = map[*src++];
|
|
}
|
|
switch (width & 3) {
|
|
case 3:
|
|
*dst++ = map[*src++];
|
|
case 2:
|
|
*dst++ = map[*src++];
|
|
case 1:
|
|
*dst++ = map[*src++];
|
|
}
|
|
#endif /* USE_DUFFS_LOOP */
|
|
src += srcskip;
|
|
dst += dstskip;
|
|
}
|
|
}
|
|
|
|
static void
|
|
Blit1to1Key(SDL_BlitInfo * info)
|
|
{
|
|
int width = info->dst_w;
|
|
int height = info->dst_h;
|
|
Uint8 *src = info->src;
|
|
int srcskip = info->src_skip;
|
|
Uint8 *dst = info->dst;
|
|
int dstskip = info->dst_skip;
|
|
Uint8 *palmap = info->table;
|
|
Uint32 ckey = info->colorkey;
|
|
|
|
if (palmap) {
|
|
while (height--) {
|
|
/* *INDENT-OFF* */
|
|
DUFFS_LOOP(
|
|
{
|
|
if ( *src != ckey ) {
|
|
*dst = palmap[*src];
|
|
}
|
|
dst++;
|
|
src++;
|
|
},
|
|
width);
|
|
/* *INDENT-ON* */
|
|
src += srcskip;
|
|
dst += dstskip;
|
|
}
|
|
} else {
|
|
while (height--) {
|
|
/* *INDENT-OFF* */
|
|
DUFFS_LOOP(
|
|
{
|
|
if ( *src != ckey ) {
|
|
*dst = *src;
|
|
}
|
|
dst++;
|
|
src++;
|
|
},
|
|
width);
|
|
/* *INDENT-ON* */
|
|
src += srcskip;
|
|
dst += dstskip;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
Blit1to2Key(SDL_BlitInfo * info)
|
|
{
|
|
int width = info->dst_w;
|
|
int height = info->dst_h;
|
|
Uint8 *src = info->src;
|
|
int srcskip = info->src_skip;
|
|
Uint16 *dstp = (Uint16 *) info->dst;
|
|
int dstskip = info->dst_skip;
|
|
Uint16 *palmap = (Uint16 *) info->table;
|
|
Uint32 ckey = info->colorkey;
|
|
|
|
/* Set up some basic variables */
|
|
dstskip /= 2;
|
|
|
|
while (height--) {
|
|
/* *INDENT-OFF* */
|
|
DUFFS_LOOP(
|
|
{
|
|
if ( *src != ckey ) {
|
|
*dstp=palmap[*src];
|
|
}
|
|
src++;
|
|
dstp++;
|
|
},
|
|
width);
|
|
/* *INDENT-ON* */
|
|
src += srcskip;
|
|
dstp += dstskip;
|
|
}
|
|
}
|
|
|
|
static void
|
|
Blit1to3Key(SDL_BlitInfo * info)
|
|
{
|
|
int width = info->dst_w;
|
|
int height = info->dst_h;
|
|
Uint8 *src = info->src;
|
|
int srcskip = info->src_skip;
|
|
Uint8 *dst = info->dst;
|
|
int dstskip = info->dst_skip;
|
|
Uint8 *palmap = info->table;
|
|
Uint32 ckey = info->colorkey;
|
|
int o;
|
|
|
|
while (height--) {
|
|
/* *INDENT-OFF* */
|
|
DUFFS_LOOP(
|
|
{
|
|
if ( *src != ckey ) {
|
|
o = *src * 4;
|
|
dst[0] = palmap[o++];
|
|
dst[1] = palmap[o++];
|
|
dst[2] = palmap[o++];
|
|
}
|
|
src++;
|
|
dst += 3;
|
|
},
|
|
width);
|
|
/* *INDENT-ON* */
|
|
src += srcskip;
|
|
dst += dstskip;
|
|
}
|
|
}
|
|
|
|
static void
|
|
Blit1to4Key(SDL_BlitInfo * info)
|
|
{
|
|
int width = info->dst_w;
|
|
int height = info->dst_h;
|
|
Uint8 *src = info->src;
|
|
int srcskip = info->src_skip;
|
|
Uint32 *dstp = (Uint32 *) info->dst;
|
|
int dstskip = info->dst_skip;
|
|
Uint32 *palmap = (Uint32 *) info->table;
|
|
Uint32 ckey = info->colorkey;
|
|
|
|
/* Set up some basic variables */
|
|
dstskip /= 4;
|
|
|
|
while (height--) {
|
|
/* *INDENT-OFF* */
|
|
DUFFS_LOOP(
|
|
{
|
|
if ( *src != ckey ) {
|
|
*dstp = palmap[*src];
|
|
}
|
|
src++;
|
|
dstp++;
|
|
},
|
|
width);
|
|
/* *INDENT-ON* */
|
|
src += srcskip;
|
|
dstp += dstskip;
|
|
}
|
|
}
|
|
|
|
static void
|
|
Blit1toNAlpha(SDL_BlitInfo * info)
|
|
{
|
|
int width = info->dst_w;
|
|
int height = info->dst_h;
|
|
Uint8 *src = info->src;
|
|
int srcskip = info->src_skip;
|
|
Uint8 *dst = info->dst;
|
|
int dstskip = info->dst_skip;
|
|
SDL_PixelFormat *dstfmt = info->dst_fmt;
|
|
const SDL_Color *srcpal = info->src_fmt->palette->colors;
|
|
int dstbpp;
|
|
Uint32 pixel;
|
|
unsigned sR, sG, sB;
|
|
unsigned dR, dG, dB, dA;
|
|
const unsigned A = info->a;
|
|
|
|
/* Set up some basic variables */
|
|
dstbpp = dstfmt->BytesPerPixel;
|
|
|
|
while (height--) {
|
|
/* *INDENT-OFF* */
|
|
DUFFS_LOOP4(
|
|
{
|
|
sR = srcpal[*src].r;
|
|
sG = srcpal[*src].g;
|
|
sB = srcpal[*src].b;
|
|
DISEMBLE_RGBA(dst, dstbpp, dstfmt, pixel, dR, dG, dB, dA);
|
|
ALPHA_BLEND_RGBA(sR, sG, sB, A, dR, dG, dB, dA);
|
|
ASSEMBLE_RGBA(dst, dstbpp, dstfmt, dR, dG, dB, dA);
|
|
src++;
|
|
dst += dstbpp;
|
|
},
|
|
width);
|
|
/* *INDENT-ON* */
|
|
src += srcskip;
|
|
dst += dstskip;
|
|
}
|
|
}
|
|
|
|
static void
|
|
Blit1toNAlphaKey(SDL_BlitInfo * info)
|
|
{
|
|
int width = info->dst_w;
|
|
int height = info->dst_h;
|
|
Uint8 *src = info->src;
|
|
int srcskip = info->src_skip;
|
|
Uint8 *dst = info->dst;
|
|
int dstskip = info->dst_skip;
|
|
SDL_PixelFormat *dstfmt = info->dst_fmt;
|
|
const SDL_Color *srcpal = info->src_fmt->palette->colors;
|
|
Uint32 ckey = info->colorkey;
|
|
int dstbpp;
|
|
Uint32 pixel;
|
|
unsigned sR, sG, sB;
|
|
unsigned dR, dG, dB, dA;
|
|
const unsigned A = info->a;
|
|
|
|
/* Set up some basic variables */
|
|
dstbpp = dstfmt->BytesPerPixel;
|
|
|
|
while (height--) {
|
|
/* *INDENT-OFF* */
|
|
DUFFS_LOOP(
|
|
{
|
|
if ( *src != ckey ) {
|
|
sR = srcpal[*src].r;
|
|
sG = srcpal[*src].g;
|
|
sB = srcpal[*src].b;
|
|
DISEMBLE_RGBA(dst, dstbpp, dstfmt, pixel, dR, dG, dB, dA);
|
|
ALPHA_BLEND_RGBA(sR, sG, sB, A, dR, dG, dB, dA);
|
|
ASSEMBLE_RGBA(dst, dstbpp, dstfmt, dR, dG, dB, dA);
|
|
}
|
|
src++;
|
|
dst += dstbpp;
|
|
},
|
|
width);
|
|
/* *INDENT-ON* */
|
|
src += srcskip;
|
|
dst += dstskip;
|
|
}
|
|
}
|
|
|
|
static const SDL_BlitFunc one_blit[] = {
|
|
(SDL_BlitFunc) NULL, Blit1to1, Blit1to2, Blit1to3, Blit1to4
|
|
};
|
|
|
|
static const SDL_BlitFunc one_blitkey[] = {
|
|
(SDL_BlitFunc) NULL, Blit1to1Key, Blit1to2Key, Blit1to3Key, Blit1to4Key
|
|
};
|
|
|
|
SDL_BlitFunc
|
|
SDL_CalculateBlit1(SDL_Surface * surface)
|
|
{
|
|
int which;
|
|
SDL_PixelFormat *dstfmt;
|
|
|
|
dstfmt = surface->map->dst->format;
|
|
if (dstfmt->BitsPerPixel < 8) {
|
|
which = 0;
|
|
} else {
|
|
which = dstfmt->BytesPerPixel;
|
|
}
|
|
switch (surface->map->info.flags & ~SDL_COPY_RLE_MASK) {
|
|
case 0:
|
|
return one_blit[which];
|
|
|
|
case SDL_COPY_COLORKEY:
|
|
return one_blitkey[which];
|
|
|
|
case SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND:
|
|
/* Supporting 8bpp->8bpp alpha is doable but requires lots of
|
|
tables which consume space and takes time to precompute,
|
|
so is better left to the user */
|
|
return which >= 2 ? Blit1toNAlpha : (SDL_BlitFunc) NULL;
|
|
|
|
case SDL_COPY_COLORKEY | SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND:
|
|
return which >= 2 ? Blit1toNAlphaKey : (SDL_BlitFunc) NULL;
|
|
}
|
|
return (SDL_BlitFunc) NULL;
|
|
}
|
|
|
|
/* vi: set ts=4 sw=4 expandtab: */
|