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Diffstat (limited to '3rdparty/SDL2/src/video/SDL_stretch.c')
-rw-r--r--3rdparty/SDL2/src/video/SDL_stretch.c353
1 files changed, 0 insertions, 353 deletions
diff --git a/3rdparty/SDL2/src/video/SDL_stretch.c b/3rdparty/SDL2/src/video/SDL_stretch.c
deleted file mode 100644
index bb34dffb760..00000000000
--- a/3rdparty/SDL2/src/video/SDL_stretch.c
+++ /dev/null
@@ -1,353 +0,0 @@
-/*
- Simple DirectMedia Layer
- Copyright (C) 1997-2016 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"
-
-/* This a stretch blit implementation based on ideas given to me by
- Tomasz Cejner - thanks! :)
-
- April 27, 2000 - Sam Lantinga
-*/
-
-#include "SDL_video.h"
-#include "SDL_blit.h"
-
-/* This isn't ready for general consumption yet - it should be folded
- into the general blitting mechanism.
-*/
-
-#if ((defined(_MFC_VER) && defined(_M_IX86)) || \
- defined(__WATCOMC__) || \
- (defined(__GNUC__) && defined(__i386__))) && SDL_ASSEMBLY_ROUTINES
-/* There's a bug with gcc 4.4.1 and -O2 where srcp doesn't get the correct
- * value after the first scanline. FIXME? */
-/* #define USE_ASM_STRETCH */
-#endif
-
-#ifdef USE_ASM_STRETCH
-
-#ifdef HAVE_MPROTECT
-#include <sys/types.h>
-#include <sys/mman.h>
-#endif
-#ifdef __GNUC__
-#define PAGE_ALIGNED __attribute__((__aligned__(4096)))
-#else
-#define PAGE_ALIGNED
-#endif
-
-#if defined(_M_IX86) || defined(i386)
-#define PREFIX16 0x66
-#define STORE_BYTE 0xAA
-#define STORE_WORD 0xAB
-#define LOAD_BYTE 0xAC
-#define LOAD_WORD 0xAD
-#define RETURN 0xC3
-#else
-#error Need assembly opcodes for this architecture
-#endif
-
-static unsigned char copy_row[4096] PAGE_ALIGNED;
-
-static int
-generate_rowbytes(int src_w, int dst_w, int bpp)
-{
- static struct
- {
- int bpp;
- int src_w;
- int dst_w;
- int status;
- } last;
-
- int i;
- int pos, inc;
- unsigned char *eip, *fence;
- unsigned char load, store;
-
- /* See if we need to regenerate the copy buffer */
- if ((src_w == last.src_w) && (dst_w == last.dst_w) && (bpp == last.bpp)) {
- return (last.status);
- }
- last.bpp = bpp;
- last.src_w = src_w;
- last.dst_w = dst_w;
- last.status = -1;
-
- switch (bpp) {
- case 1:
- load = LOAD_BYTE;
- store = STORE_BYTE;
- break;
- case 2:
- case 4:
- load = LOAD_WORD;
- store = STORE_WORD;
- break;
- default:
- return SDL_SetError("ASM stretch of %d bytes isn't supported\n", bpp);
- }
-#ifdef HAVE_MPROTECT
- /* Make the code writeable */
- if (mprotect(copy_row, sizeof(copy_row), PROT_READ | PROT_WRITE) < 0) {
- return SDL_SetError("Couldn't make copy buffer writeable");
- }
-#endif
- pos = 0x10000;
- inc = (src_w << 16) / dst_w;
- eip = copy_row;
- fence = copy_row + sizeof(copy_row)-2;
- for (i = 0; i < dst_w; ++i) {
- while (pos >= 0x10000L) {
- if (eip == fence) {
- return -1;
- }
- if (bpp == 2) {
- *eip++ = PREFIX16;
- }
- *eip++ = load;
- pos -= 0x10000L;
- }
- if (eip == fence) {
- return -1;
- }
- if (bpp == 2) {
- *eip++ = PREFIX16;
- }
- *eip++ = store;
- pos += inc;
- }
- *eip++ = RETURN;
-
-#ifdef HAVE_MPROTECT
- /* Make the code executable but not writeable */
- if (mprotect(copy_row, sizeof(copy_row), PROT_READ | PROT_EXEC) < 0) {
- return SDL_SetError("Couldn't make copy buffer executable");
- }
-#endif
- last.status = 0;
- return (0);
-}
-
-#endif /* USE_ASM_STRETCH */
-
-#define DEFINE_COPY_ROW(name, type) \
-static void name(type *src, int src_w, type *dst, int dst_w) \
-{ \
- int i; \
- int pos, inc; \
- type pixel = 0; \
- \
- pos = 0x10000; \
- inc = (src_w << 16) / dst_w; \
- for ( i=dst_w; i>0; --i ) { \
- while ( pos >= 0x10000L ) { \
- pixel = *src++; \
- pos -= 0x10000L; \
- } \
- *dst++ = pixel; \
- pos += inc; \
- } \
-}
-/* *INDENT-OFF* */
-DEFINE_COPY_ROW(copy_row1, Uint8)
-DEFINE_COPY_ROW(copy_row2, Uint16)
-DEFINE_COPY_ROW(copy_row4, Uint32)
-/* *INDENT-ON* */
-
-/* The ASM code doesn't handle 24-bpp stretch blits */
-static void
-copy_row3(Uint8 * src, int src_w, Uint8 * dst, int dst_w)
-{
- int i;
- int pos, inc;
- Uint8 pixel[3] = { 0, 0, 0 };
-
- pos = 0x10000;
- inc = (src_w << 16) / dst_w;
- for (i = dst_w; i > 0; --i) {
- while (pos >= 0x10000L) {
- pixel[0] = *src++;
- pixel[1] = *src++;
- pixel[2] = *src++;
- pos -= 0x10000L;
- }
- *dst++ = pixel[0];
- *dst++ = pixel[1];
- *dst++ = pixel[2];
- pos += inc;
- }
-}
-
-/* Perform a stretch blit between two surfaces of the same format.
- NOTE: This function is not safe to call from multiple threads!
-*/
-int
-SDL_SoftStretch(SDL_Surface * src, const SDL_Rect * srcrect,
- SDL_Surface * dst, const SDL_Rect * dstrect)
-{
- int src_locked;
- int dst_locked;
- int pos, inc;
- int dst_maxrow;
- int src_row, dst_row;
- Uint8 *srcp = NULL;
- Uint8 *dstp;
- SDL_Rect full_src;
- SDL_Rect full_dst;
-#ifdef USE_ASM_STRETCH
- SDL_bool use_asm = SDL_TRUE;
-#ifdef __GNUC__
- int u1, u2;
-#endif
-#endif /* USE_ASM_STRETCH */
- const int bpp = dst->format->BytesPerPixel;
-
- if (src->format->format != dst->format->format) {
- return SDL_SetError("Only works with same format surfaces");
- }
-
- /* Verify the blit rectangles */
- if (srcrect) {
- if ((srcrect->x < 0) || (srcrect->y < 0) ||
- ((srcrect->x + srcrect->w) > src->w) ||
- ((srcrect->y + srcrect->h) > src->h)) {
- return SDL_SetError("Invalid source blit rectangle");
- }
- } else {
- full_src.x = 0;
- full_src.y = 0;
- full_src.w = src->w;
- full_src.h = src->h;
- srcrect = &full_src;
- }
- if (dstrect) {
- if ((dstrect->x < 0) || (dstrect->y < 0) ||
- ((dstrect->x + dstrect->w) > dst->w) ||
- ((dstrect->y + dstrect->h) > dst->h)) {
- return SDL_SetError("Invalid destination blit rectangle");
- }
- } else {
- full_dst.x = 0;
- full_dst.y = 0;
- full_dst.w = dst->w;
- full_dst.h = dst->h;
- dstrect = &full_dst;
- }
-
- /* Lock the destination if it's in hardware */
- dst_locked = 0;
- if (SDL_MUSTLOCK(dst)) {
- if (SDL_LockSurface(dst) < 0) {
- return SDL_SetError("Unable to lock destination surface");
- }
- dst_locked = 1;
- }
- /* Lock the source if it's in hardware */
- src_locked = 0;
- if (SDL_MUSTLOCK(src)) {
- if (SDL_LockSurface(src) < 0) {
- if (dst_locked) {
- SDL_UnlockSurface(dst);
- }
- return SDL_SetError("Unable to lock source surface");
- }
- src_locked = 1;
- }
-
- /* Set up the data... */
- pos = 0x10000;
- inc = (srcrect->h << 16) / dstrect->h;
- src_row = srcrect->y;
- dst_row = dstrect->y;
-
-#ifdef USE_ASM_STRETCH
- /* Write the opcodes for this stretch */
- if ((bpp == 3) || (generate_rowbytes(srcrect->w, dstrect->w, bpp) < 0)) {
- use_asm = SDL_FALSE;
- }
-#endif
-
- /* Perform the stretch blit */
- for (dst_maxrow = dst_row + dstrect->h; dst_row < dst_maxrow; ++dst_row) {
- dstp = (Uint8 *) dst->pixels + (dst_row * dst->pitch)
- + (dstrect->x * bpp);
- while (pos >= 0x10000L) {
- srcp = (Uint8 *) src->pixels + (src_row * src->pitch)
- + (srcrect->x * bpp);
- ++src_row;
- pos -= 0x10000L;
- }
-#ifdef USE_ASM_STRETCH
- if (use_asm) {
-#ifdef __GNUC__
- __asm__ __volatile__("call *%4":"=&D"(u1), "=&S"(u2)
- :"0"(dstp), "1"(srcp), "r"(copy_row)
- :"memory");
-#elif defined(_MSC_VER) || defined(__WATCOMC__)
- /* *INDENT-OFF* */
- {
- void *code = copy_row;
- __asm {
- push edi
- push esi
- mov edi, dstp
- mov esi, srcp
- call dword ptr code
- pop esi
- pop edi
- }
- }
- /* *INDENT-ON* */
-#else
-#error Need inline assembly for this compiler
-#endif
- } else
-#endif
- switch (bpp) {
- case 1:
- copy_row1(srcp, srcrect->w, dstp, dstrect->w);
- break;
- case 2:
- copy_row2((Uint16 *) srcp, srcrect->w,
- (Uint16 *) dstp, dstrect->w);
- break;
- case 3:
- copy_row3(srcp, srcrect->w, dstp, dstrect->w);
- break;
- case 4:
- copy_row4((Uint32 *) srcp, srcrect->w,
- (Uint32 *) dstp, dstrect->w);
- break;
- }
- pos += inc;
- }
-
- /* We need to unlock the surfaces if they're locked */
- if (dst_locked) {
- SDL_UnlockSurface(dst);
- }
- if (src_locked) {
- SDL_UnlockSurface(src);
- }
- return (0);
-}
-
-/* vi: set ts=4 sw=4 expandtab: */