diff options
| -rw-r--r-- | common/module.mk | 5 | ||||
| -rw-r--r-- | common/scaler.cpp | 94 | ||||
| -rw-r--r-- | common/scaler/scale2x.cpp | 927 | ||||
| -rw-r--r-- | common/scaler/scale2x.h | 52 | ||||
| -rw-r--r-- | common/scaler/scale3x.cpp | 386 | ||||
| -rw-r--r-- | common/scaler/scale3x.h | 33 | ||||
| -rw-r--r-- | common/scaler/scalebit.cpp | 391 | ||||
| -rw-r--r-- | common/scaler/scalebit.h | 43 |
8 files changed, 1839 insertions, 92 deletions
diff --git a/common/module.mk b/common/module.mk index 6d9d8a8079..60f4d22bf6 100644 --- a/common/module.mk +++ b/common/module.mk @@ -14,7 +14,10 @@ MODULE_OBJS := \ common/scaler/2xsai.o \ common/scaler/aspect.o \ common/scaler/hq2x.o \ - common/scaler/hq3x.o + common/scaler/hq3x.o \ + common/scaler/scale2x.o \ + common/scaler/scale3x.o \ + common/scaler/scalebit.o ifdef HAVE_NASM MODULE_OBJS += \ diff --git a/common/scaler.cpp b/common/scaler.cpp index 7557402bfa..0ef78768fa 100644 --- a/common/scaler.cpp +++ b/common/scaler.cpp @@ -21,6 +21,7 @@ */ #include "common/scaler/intern.h" +#include "common/scaler/scalebit.h" #include "common/util.h" @@ -172,46 +173,7 @@ void Normal3x(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPit */ void AdvMame2x(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch, int width, int height) { - const uint32 nextlineSrc = srcPitch / sizeof(uint16); - const uint16 *p = (const uint16 *)srcPtr; - - const uint32 nextlineDst = dstPitch / sizeof(uint16); - uint16 *q = (uint16 *)dstPtr; - - uint16 A, B, C; - uint16 D, E, F; - uint16 G, H, I; - - while (height--) { - B = *(p - 1 - nextlineSrc); - E = *(p - 1); - H = *(p - 1 + nextlineSrc); - C = *(p - nextlineSrc); - F = *(p); - I = *(p + nextlineSrc); - int tmpWidth = width; - while (tmpWidth--) { - p++; - A = B; B = C; C = *(p - nextlineSrc); - D = E; E = F; F = *(p); - G = H; H = I; I = *(p + nextlineSrc); - - if (B != H && D != F) { - *(q + 0) = D == B ? D : E; - *(q + 1) = B == F ? F : E; - *(q + nextlineDst + 0) = D == H ? D : E; - *(q + nextlineDst + 1) = H == F ? F : E; - } else { - *(q + 0) = E; - *(q + 1) = E; - *(q + nextlineDst + 0) = E; - *(q + nextlineDst + 1) = E; - } - q += 2; - } - p += nextlineSrc - width; - q += (nextlineDst - width) << 1; - } + scale(2, dstPtr, dstPitch, srcPtr, srcPitch, 2, width, height); } /** @@ -220,57 +182,7 @@ void AdvMame2x(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPi */ void AdvMame3x(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch, int width, int height) { - const uint32 nextlineSrc = srcPitch / sizeof(uint16); - const uint16 *p = (const uint16 *)srcPtr; - - const uint32 nextlineDst = dstPitch / sizeof(uint16); - uint16 *q = (uint16 *)dstPtr; - - uint16 A, B, C; - uint16 D, E, F; - uint16 G, H, I; - - while (height--) { - B = *(p - 1 - nextlineSrc); - E = *(p - 1); - H = *(p - 1 + nextlineSrc); - C = *(p - nextlineSrc); - F = *(p); - I = *(p + nextlineSrc); - int tmpWidth = width; - while (tmpWidth--) { - p++; - A = B; B = C; C = *(p - nextlineSrc); - D = E; E = F; F = *(p); - G = H; H = I; I = *(p + nextlineSrc); - - if (B != H && D != F) { - *(q + 0) = D == B ? D : E; - *(q + 1) = (D == B && E != C) || (B == F && E != A) ? B : E; - *(q + 2) = B == F ? F : E; - *(q + nextlineDst + 0) = (D == B && E != G) || (D == B && E != A) ? D : E; - *(q + nextlineDst + 1) = E; - *(q + nextlineDst + 2) = (B == F && E != I) || (H == F && E != C) ? F : E; - *(q + 2 * nextlineDst + 0) = D == H ? D : E; - *(q + 2 * nextlineDst + 1) = (D == H && E != I) || (H == F && E != G) ? H : E; - *(q + 2 * nextlineDst + 2) = H == F ? F : E; - } else { - *(q + 0) = E; - *(q + 1) = E; - *(q + 2) = E; - *(q + nextlineDst + 0) = E; - *(q + nextlineDst + 1) = E; - *(q + nextlineDst + 2) = E; - *(q + 2 * nextlineDst + 0) = E; - *(q + 2 * nextlineDst + 1) = E; - *(q + 2 * nextlineDst + 2) = E; - } - - q += 3; - } - p += nextlineSrc - width; - q += (nextlineDst - width) * 3; - } + scale(3, dstPtr, dstPitch, srcPtr, srcPitch, 2, width, height); } template<int bitFormat> diff --git a/common/scaler/scale2x.cpp b/common/scaler/scale2x.cpp new file mode 100644 index 0000000000..3684c94348 --- /dev/null +++ b/common/scaler/scale2x.cpp @@ -0,0 +1,927 @@ +/* + * This file is part of the Scale2x project. + * + * Copyright (C) 2001, 2002, 2003, 2004 Andrea Mazzoleni + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +/* + * This file contains a C and MMX implementation of the Scale2x effect. + * + * You can find an high level description of the effect at : + * + * http://scale2x.sourceforge.net/ + * + * Alternatively at the previous license terms, you are allowed to use this + * code in your program with these conditions: + * - the program is not used in commercial activities. + * - the whole source code of the program is released with the binary. + * - derivative works of the program are allowed. + */ + +#if HAVE_CONFIG_H +#include <config.h> +#endif + +#include "scale2x.h" + +#include <assert.h> + +/***************************************************************************/ +/* Scale2x C implementation */ + +static inline void scale2x_8_def_single(scale2x_uint8* __restrict__ dst, const scale2x_uint8* __restrict__ src0, const scale2x_uint8* __restrict__ src1, const scale2x_uint8* __restrict__ src2, unsigned count) +{ + assert(count >= 2); + + /* first pixel */ + dst[0] = src1[0]; + if (src1[1] == src0[0] && src2[0] != src0[0]) + dst[1] = src0[0]; + else + dst[1] = src1[0]; + ++src0; + ++src1; + ++src2; + dst += 2; + + /* central pixels */ + count -= 2; + while (count) { + if (src0[0] != src2[0] && src1[-1] != src1[1]) { + dst[0] = src1[-1] == src0[0] ? src0[0] : src1[0]; + dst[1] = src1[1] == src0[0] ? src0[0] : src1[0]; + } else { + dst[0] = src1[0]; + dst[1] = src1[0]; + } + + ++src0; + ++src1; + ++src2; + dst += 2; + --count; + } + + /* last pixel */ + if (src1[-1] == src0[0] && src2[0] != src0[0]) + dst[0] = src0[0]; + else + dst[0] = src1[0]; + dst[1] = src1[0]; +} + +static inline void scale2x_16_def_single(scale2x_uint16* __restrict__ dst, const scale2x_uint16* __restrict__ src0, const scale2x_uint16* __restrict__ src1, const scale2x_uint16* __restrict__ src2, unsigned count) +{ + assert(count >= 2); + + /* first pixel */ + dst[0] = src1[0]; + if (src1[1] == src0[0] && src2[0] != src0[0]) + dst[1] = src0[0]; + else + dst[1] = src1[0]; + ++src0; + ++src1; + ++src2; + dst += 2; + + /* central pixels */ + count -= 2; + while (count) { + if (src0[0] != src2[0] && src1[-1] != src1[1]) { + dst[0] = src1[-1] == src0[0] ? src0[0] : src1[0]; + dst[1] = src1[1] == src0[0] ? src0[0] : src1[0]; + } else { + dst[0] = src1[0]; + dst[1] = src1[0]; + } + + ++src0; + ++src1; + ++src2; + dst += 2; + --count; + } + + /* last pixel */ + if (src1[-1] == src0[0] && src2[0] != src0[0]) + dst[0] = src0[0]; + else + dst[0] = src1[0]; + dst[1] = src1[0]; +} + +static inline void scale2x_32_def_single(scale2x_uint32* __restrict__ dst, const scale2x_uint32* __restrict__ src0, const scale2x_uint32* __restrict__ src1, const scale2x_uint32* __restrict__ src2, unsigned count) +{ + assert(count >= 2); + + /* first pixel */ + dst[0] = src1[0]; + if (src1[1] == src0[0] && src2[0] != src0[0]) + dst[1] = src0[0]; + else + dst[1] = src1[0]; + ++src0; + ++src1; + ++src2; + dst += 2; + + /* central pixels */ + count -= 2; + while (count) { + if (src0[0] != src2[0] && src1[-1] != src1[1]) { + dst[0] = src1[-1] == src0[0] ? src0[0] : src1[0]; + dst[1] = src1[1] == src0[0] ? src0[0] : src1[0]; + } else { + dst[0] = src1[0]; + dst[1] = src1[0]; + } + + ++src0; + ++src1; + ++src2; + dst += 2; + --count; + } + + /* last pixel */ + if (src1[-1] == src0[0] && src2[0] != src0[0]) + dst[0] = src0[0]; + else + dst[0] = src1[0]; + dst[1] = src1[0]; +} + +/** + * Scale by a factor of 2 a row of pixels of 8 bits. + * The function is implemented in C. + * The pixels over the left and right borders are assumed of the same color of + * the pixels on the border. + * \param src0 Pointer at the first pixel of the previous row. + * \param src1 Pointer at the first pixel of the current row. + * \param src2 Pointer at the first pixel of the next row. + * \param count Length in pixels of the src0, src1 and src2 rows. + * It must be at least 2. + * \param dst0 First destination row, double length in pixels. + * \param dst1 Second destination row, double length in pixels. + */ +void scale2x_8_def(scale2x_uint8* dst0, scale2x_uint8* dst1, const scale2x_uint8* src0, const scale2x_uint8* src1, const scale2x_uint8* src2, unsigned count) +{ + assert(count >= 2); + + scale2x_8_def_single(dst0, src0, src1, src2, count); + scale2x_8_def_single(dst1, src2, src1, src0, count); +} + +/** + * Scale by a factor of 2 a row of pixels of 16 bits. + * This function operates like scale2x_8_def() but for 16 bits pixels. + * \param src0 Pointer at the first pixel of the previous row. + * \param src1 Pointer at the first pixel of the current row. + * \param src2 Pointer at the first pixel of the next row. + * \param count Length in pixels of the src0, src1 and src2 rows. + * It must be at least 2. + * \param dst0 First destination row, double length in pixels. + * \param dst1 Second destination row, double length in pixels. + */ +void scale2x_16_def(scale2x_uint16* dst0, scale2x_uint16* dst1, const scale2x_uint16* src0, const scale2x_uint16* src1, const scale2x_uint16* src2, unsigned count) +{ + assert(count >= 2); + + scale2x_16_def_single(dst0, src0, src1, src2, count); + scale2x_16_def_single(dst1, src2, src1, src0, count); +} + +/** + * Scale by a factor of 2 a row of pixels of 32 bits. + * This function operates like scale2x_8_def() but for 32 bits pixels. + * \param src0 Pointer at the first pixel of the previous row. + * \param src1 Pointer at the first pixel of the current row. + * \param src2 Pointer at the first pixel of the next row. + * \param count Length in pixels of the src0, src1 and src2 rows. + * It must be at least 2. + * \param dst0 First destination row, double length in pixels. + * \param dst1 Second destination row, double length in pixels. + */ +void scale2x_32_def(scale2x_uint32* dst0, scale2x_uint32* dst1, const scale2x_uint32* src0, const scale2x_uint32* src1, const scale2x_uint32* src2, unsigned count) +{ + assert(count >= 2); + + scale2x_32_def_single(dst0, src0, src1, src2, count); + scale2x_32_def_single(dst1, src2, src1, src0, count); +} + +/***************************************************************************/ +/* Scale2x MMX implementation */ + +#if defined(__GNUC__) && defined(__i386__) + +/* + * Apply the Scale2x effect at a single row. + * This function must be called only by the other scale2x functions. + * + * Considering the pixel map : + * + * ABC (src0) + * DEF (src1) + * GHI (src2) + * + * this functions compute 2 new pixels in substitution of the source pixel E + * like this map : + * + * ab (dst) + * + * with these variables : + * + * ¤t -> E + * ¤t_left -> D + * ¤t_right -> F + * ¤t_upper -> B + * ¤t_lower -> H + * + * %0 -> current_upper + * %1 -> current + * %2 -> current_lower + * %3 -> dst + * %4 -> counter + * + * %mm0 -> *current_left + * %mm1 -> *current_next + * %mm2 -> tmp0 + * %mm3 -> tmp1 + * %mm4 -> tmp2 + * %mm5 -> tmp3 + * %mm6 -> *current_upper + * %mm7 -> *current + */ +static inline void scale2x_8_mmx_single(scale2x_uint8* dst, const scale2x_uint8* src0, const scale2x_uint8* src1, const scale2x_uint8* src2, unsigned count) +{ + assert(count >= 16); + assert(count % 8 == 0); + + /* always do the first and last run */ + count -= 2*8; + + __asm__ __volatile__( +/* first run */ + /* set the current, current_pre, current_next registers */ + "movq 0(%1), %%mm0\n" + "movq 0(%1), %%mm7\n" + "movq 8(%1), %%mm1\n" + "psllq $56, %%mm0\n" + "psllq $56, %%mm1\n" + "psrlq $56, %%mm0\n" + "movq %%mm7, %%mm2\n" + "movq %%mm7, %%mm3\n" + "psllq $8, %%mm2\n" + "psrlq $8, %%mm3\n" + "por %%mm2, %%mm0\n" + "por %%mm3, %%mm1\n" + + /* current_upper */ + "movq (%0), %%mm6\n" + + /* compute the upper-left pixel for dst on %%mm2 */ + /* compute the upper-right pixel for dst on %%mm4 */ + "movq %%mm0, %%mm2\n" + "movq %%mm1, %%mm4\n" + "movq %%mm0, %%mm3\n" + "movq %%mm1, %%mm5\n" + "pcmpeqb %%mm6, %%mm2\n" + "pcmpeqb %%mm6, %%mm4\n" + "pcmpeqb (%2), %%mm3\n" + "pcmpeqb (%2), %%mm5\n" + "pandn %%mm2, %%mm3\n" + "pandn %%mm4, %%mm5\n" + "movq %%mm0, %%mm2\n" + "movq %%mm1, %%mm4\n" + "pcmpeqb %%mm1, %%mm2\n" + "pcmpeqb %%mm0, %%mm4\n" + "pandn %%mm3, %%mm2\n" + "pandn %%mm5, %%mm4\n" + "movq %%mm2, %%mm3\n" + "movq %%mm4, %%mm5\n" + "pand %%mm6, %%mm2\n" + "pand %%mm6, %%mm4\n" + "pandn %%mm7, %%mm3\n" + "pandn %%mm7, %%mm5\n" + "por %%mm3, %%mm2\n" + "por %%mm5, %%mm4\n" + + /* set *dst */ + "movq %%mm2, %%mm3\n" + "punpcklbw %%mm4, %%mm2\n" + "punpckhbw %%mm4, %%mm3\n" + "movq %%mm2, (%3)\n" + "movq %%mm3, 8(%3)\n" + + /* next */ + "addl $8, %0\n" + "addl $8, %1\n" + "addl $8, %2\n" + "addl $16, %3\n" + +/* central runs */ + "shrl $3, %4\n" + "jz 1f\n" + + "0:\n" + + /* set the current, current_pre, current_next registers */ + "movq -8(%1), %%mm0\n" + "movq (%1), %%mm7\n" + "movq 8(%1), %%mm1\n" + "psrlq $56, %%mm0\n" + "psllq $56, %%mm1\n" + "movq %%mm7, %%mm2\n" + "movq %%mm7, %%mm3\n" + "psllq $8, %%mm2\n" + "psrlq $8, %%mm3\n" + "por %%mm2, %%mm0\n" + "por %%mm3, %%mm1\n" + + /* current_upper */ + "movq (%0), %%mm6\n" + + /* compute the upper-left pixel for dst on %%mm2 */ + /* compute the upper-right pixel for dst on %%mm4 */ + "movq %%mm0, %%mm2\n" + "movq %%mm1, %%mm4\n" + "movq %%mm0, %%mm3\n" + "movq %%mm1, %%mm5\n" + "pcmpeqb %%mm6, %%mm2\n" + "pcmpeqb %%mm6, %%mm4\n" + "pcmpeqb (%2), %%mm3\n" + "pcmpeqb (%2), %%mm5\n" + "pandn %%mm2, %%mm3\n" + "pandn %%mm4, %%mm5\n" + "movq %%mm0, %%mm2\n" + "movq %%mm1, %%mm4\n" + "pcmpeqb %%mm1, %%mm2\n" + "pcmpeqb %%mm0, %%mm4\n" + "pandn %%mm3, %%mm2\n" + "pandn %%mm5, %%mm4\n" + "movq %%mm2, %%mm3\n" + "movq %%mm4, %%mm5\n" + "pand %%mm6, %%mm2\n" + "pand %%mm6, %%mm4\n" + "pandn %%mm7, %%mm3\n" + "pandn %%mm7, %%mm5\n" + "por %%mm3, %%mm2\n" + "por %%mm5, %%mm4\n" + + /* set *dst */ + "movq %%mm2, %%mm3\n" + "punpcklbw %%mm4, %%mm2\n" + "punpckhbw %%mm4, %%mm3\n" + "movq %%mm2, (%3)\n" + "movq %%mm3, 8(%3)\n" + + /* next */ + "addl $8, %0\n" + "addl $8, %1\n" + "addl $8, %2\n" + "addl $16, %3\n" + + "decl %4\n" + "jnz 0b\n" + "1:\n" + +/* final run */ + /* set the current, current_pre, current_next registers */ + "movq (%1), %%mm1\n" + "movq (%1), %%mm7\n" + "movq -8(%1), %%mm0\n" + "psrlq $56, %%mm1\n" + "psrlq $56, %%mm0\n" + "psllq $56, %%mm1\n" + "movq %%mm7, %%mm2\n" + "movq %%mm7, %%mm3\n" + "psllq $8, %%mm2\n" + "psrlq $8, %%mm3\n" + "por %%mm2, %%mm0\n" + "por %%mm3, %%mm1\n" + + /* current_upper */ + "movq (%0), %%mm6\n" + + /* compute the upper-left pixel for dst on %%mm2 */ + /* compute the upper-right pixel for dst on %%mm4 */ + "movq %%mm0, %%mm2\n" + "movq %%mm1, %%mm4\n" + "movq %%mm0, %%mm3\n" + "movq %%mm1, %%mm5\n" + "pcmpeqb %%mm6, %%mm2\n" + "pcmpeqb %%mm6, %%mm4\n" + "pcmpeqb (%2), %%mm3\n" + "pcmpeqb (%2), %%mm5\n" + "pandn %%mm2, %%mm3\n" + "pandn %%mm4, %%mm5\n" + "movq %%mm0, %%mm2\n" + "movq %%mm1, %%mm4\n" + "pcmpeqb %%mm1, %%mm2\n" + "pcmpeqb %%mm0, %%mm4\n" + "pandn %%mm3, %%mm2\n" + "pandn %%mm5, %%mm4\n" + "movq %%mm2, %%mm3\n" + "movq %%mm4, %%mm5\n" + "pand %%mm6, %%mm2\n" + "pand %%mm6, %%mm4\n" + "pandn %%mm7, %%mm3\n" + "pandn %%mm7, %%mm5\n" + "por %%mm3, %%mm2\n" + "por %%mm5, %%mm4\n" + + /* set *dst */ + "movq %%mm2, %%mm3\n" + "punpcklbw %%mm4, %%mm2\n" + "punpckhbw %%mm4, %%mm3\n" + "movq %%mm2, (%3)\n" + "movq %%mm3, 8(%3)\n" + + : "+r" (src0), "+r" (src1), "+r" (src2), "+r" (dst), "+r" (count) + : + : "cc" + ); +} + +static inline void scale2x_16_mmx_single(scale2x_uint16* dst, const scale2x_uint16* src0, const scale2x_uint16* src1, const scale2x_uint16* src2, unsigned count) +{ + assert(count >= 8); + assert(count % 4 == 0); + + /* always do the first and last run */ + count -= 2*4; + + __asm__ __volatile__( +/* first run */ + /* set the current, current_pre, current_next registers */ + "movq 0(%1), %%mm0\n" + "movq 0(%1), %%mm7\n" + "movq 8(%1), %%mm1\n" + "psllq $48, %%mm0\n" + "psllq $48, %%mm1\n" + "psrlq $48, %%mm0\n" + "movq %%mm7, %%mm2\n" + "movq %%mm7, %%mm3\n" + "psllq $16, %%mm2\n" + "psrlq $16, %%mm3\n" + "por %%mm2, %%mm0\n" + "por %%mm3, %%mm1\n" + + /* current_upper */ + "movq (%0), %%mm6\n" + + /* compute the upper-left pixel for dst on %%mm2 */ + /* compute the upper-right pixel for dst on %%mm4 */ + "movq %%mm0, %%mm2\n" + "movq %%mm1, %%mm4\n" + "movq %%mm0, %%mm3\n" + "movq %%mm1, %%mm5\n" + "pcmpeqw %%mm6, %%mm2\n" + "pcmpeqw %%mm6, %%mm4\n" + "pcmpeqw (%2), %%mm3\n" + "pcmpeqw (%2), %%mm5\n" + "pandn %%mm2, %%mm3\n" + "pandn %%mm4, %%mm5\n" + "movq %%mm0, %%mm2\n" + "movq %%mm1, %%mm4\n" + "pcmpeqw %%mm1, %%mm2\n" + "pcmpeqw %%mm0, %%mm4\n" + "pandn %%mm3, %%mm2\n" + "pandn %%mm5, %%mm4\n" + "movq %%mm2, %%mm3\n" + "movq %%mm4, %%mm5\n" + "pand %%mm6, %%mm2\n" + "pand %%mm6, %%mm4\n" + "pandn %%mm7, %%mm3\n" + "pandn %%mm7, %%mm5\n" + "por %%mm3, %%mm2\n" + "por %%mm5, %%mm4\n" + + /* set *dst */ + "movq %%mm2, %%mm3\n" + "punpcklwd %%mm4, %%mm2\n" + "punpckhwd %%mm4, %%mm3\n" + "movq %%mm2, (%3)\n" + "movq %%mm3, 8(%3)\n" + + /* next */ + "addl $8, %0\n" + "addl $8, %1\n" + "addl $8, %2\n" + "addl $16, %3\n" + +/* central runs */ + "shrl $2, %4\n" + "jz 1f\n" + + "0:\n" + + /* set the current, current_pre, current_next registers */ + "movq -8(%1), %%mm0\n" + "movq (%1), %%mm7\n" + "movq 8(%1), %%mm1\n" + "psrlq $48, %%mm0\n" + "psllq $48, %%mm1\n" + "movq %%mm7, %%mm2\n" + "movq %%mm7, %%mm3\n" + "psllq $16, %%mm2\n" + "psrlq $16, %%mm3\n" + "por %%mm2, %%mm0\n" + "por %%mm3, %%mm1\n" + + /* current_upper */ + "movq (%0), %%mm6\n" + + /* compute the upper-left pixel for dst on %%mm2 */ + /* compute the upper-right pixel for dst on %%mm4 */ + "movq %%mm0, %%mm2\n" + "movq %%mm1, %%mm4\n" + "movq %%mm0, %%mm3\n" + "movq %%mm1, %%mm5\n" + "pcmpeqw %%mm6, %%mm2\n" + "pcmpeqw %%mm6, %%mm4\n" + "pcmpeqw (%2), %%mm3\n" + "pcmpeqw (%2), %%mm5\n" + "pandn %%mm2, %%mm3\n" + "pandn %%mm4, %%mm5\n" + "movq %%mm0, %%mm2\n" + "movq %%mm1, %%mm4\n" + "pcmpeqw %%mm1, %%mm2\n" + "pcmpeqw %%mm0, %%mm4\n" + "pandn %%mm3, %%mm2\n" + "pandn %%mm5, %%mm4\n" + "movq %%mm2, %%mm3\n" + "movq %%mm4, %%mm5\n" + "pand %%mm6, %%mm2\n" + "pand %%mm6, %%mm4\n" + "pandn %%mm7, %%mm3\n" + "pandn %%mm7, %%mm5\n" + "por %%mm3, %%mm2\n" + "por %%mm5, %%mm4\n" + + /* set *dst */ + "movq %%mm2, %%mm3\n" + "punpcklwd %%mm4, %%mm2\n" + "punpckhwd %%mm4, %%mm3\n" + "movq %%mm2, (%3)\n" + "movq %%mm3, 8(%3)\n" + + /* next */ + "addl $8, %0\n" + "addl $8, %1\n" + "addl $8, %2\n" + "addl $16, %3\n" + + "decl %4\n" + "jnz 0b\n" + "1:\n" + +/* final run */ + /* set the current, current_pre, current_next registers */ + "movq (%1), %%mm1\n" + "movq (%1), %%mm7\n" + "movq -8(%1), %%mm0\n" + "psrlq $48, %%mm1\n" + "psrlq $48, %%mm0\n" + "psllq $48, %%mm1\n" + "movq %%mm7, %%mm2\n" + "movq %%mm7, %%mm3\n" + "psllq $16, %%mm2\n" + "psrlq $16, %%mm3\n" + "por %%mm2, %%mm0\n" + "por %%mm3, %%mm1\n" + + /* current_upper */ + "movq (%0), %%mm6\n" + + /* compute the upper-left pixel for dst on %%mm2 */ + /* compute the upper-right pixel for dst on %%mm4 */ + "movq %%mm0, %%mm2\n" + "movq %%mm1, %%mm4\n" + "movq %%mm0, %%mm3\n" + "movq %%mm1, %%mm5\n" + "pcmpeqw %%mm6, %%mm2\n" + "pcmpeqw %%mm6, %%mm4\n" + "pcmpeqw (%2), %%mm3\n" + "pcmpeqw (%2), %%mm5\n" + "pandn %%mm2, %%mm3\n" + "pandn %%mm4, %%mm5\n" + "movq %%mm0, %%mm2\n" + "movq %%mm1, %%mm4\n" + "pcmpeqw %%mm1, %%mm2\n" + "pcmpeqw %%mm0, %%mm4\n" + "pandn %%mm3, %%mm2\n" + "pandn %%mm5, %%mm4\n" + "movq %%mm2, %%mm3\n" + "movq %%mm4, %%mm5\n" + "pand %%mm6, %%mm2\n" + "pand %%mm6, %%mm4\n" + "pandn %%mm7, %%mm3\n" + "pandn %%mm7, %%mm5\n" + "por %%mm3, %%mm2\n" + "por %%mm5, %%mm4\n" + + /* set *dst */ + "movq %%mm2, %%mm3\n" + "punpcklwd %%mm4, %%mm2\n" + "punpckhwd %%mm4, %%mm3\n" + "movq %%mm2, (%3)\n" + "movq %%mm3, 8(%3)\n" + + : "+r" (src0), "+r" (src1), "+r" (src2), "+r" (dst), "+r" (count) + : + : "cc" + ); +} + +static inline void scale2x_32_mmx_single(scale2x_uint32* dst, const scale2x_uint32* src0, const scale2x_uint32* src1, const scale2x_uint32* src2, unsigned count) +{ + assert(count >= 4); + assert(count % 2 == 0); + + /* always do the first and last run */ + count -= 2*2; + + __asm__ __volatile__( +/* first run */ + /* set the current, current_pre, current_next registers */ + "movq 0(%1), %%mm0\n" + "movq 0(%1), %%mm7\n" + "movq 8(%1), %%mm1\n" + "psllq $32, %%mm0\n" + "psllq $32, %%mm1\n" + "psrlq $32, %%mm0\n" + "movq %%mm7, %%mm2\n" + "movq %%mm7, %%mm3\n" + "psllq $32, %%mm2\n" + "psrlq $32, %%mm3\n" + "por %%mm2, %%mm0\n" + "por %%mm3, %%mm1\n" + + /* current_upper */ + "movq (%0), %%mm6\n" + + /* compute the upper-left pixel for dst on %%mm2 */ + /* compute the upper-right pixel for dst on %%mm4 */ + "movq %%mm0, %%mm2\n" + "movq %%mm1, %%mm4\n" + "movq %%mm0, %%mm3\n" + "movq %%mm1, %%mm5\n" + "pcmpeqd %%mm6, %%mm2\n" + "pcmpeqd %%mm6, %%mm4\n" + "pcmpeqd (%2), %%mm3\n" + "pcmpeqd (%2), %%mm5\n" + "pandn %%mm2, %%mm3\n" + "pandn %%mm4, %%mm5\n" + "movq %%mm0, %%mm2\n" + "movq %%mm1, %%mm4\n" + "pcmpeqd %%mm1, %%mm2\n" + "pcmpeqd %%mm0, %%mm4\n" + "pandn %%mm3, %%mm2\n" + "pandn %%mm5, %%mm4\n" + "movq %%mm2, %%mm3\n" + "movq %%mm4, %%mm5\n" + "pand %%mm6, %%mm2\n" + "pand %%mm6, %%mm4\n" + "pandn %%mm7, %%mm3\n" + "pandn %%mm7, %%mm5\n" + "por %%mm3, %%mm2\n" + "por %%mm5, %%mm4\n" + + /* set *dst */ + "movq %%mm2, %%mm3\n" + "punpckldq %%mm4, %%mm2\n" + "punpckhdq %%mm4, %%mm3\n" + "movq %%mm2, (%3)\n" + "movq %%mm3, 8(%3)\n" + + /* next */ + "addl $8, %0\n" + "addl $8, %1\n" + "addl $8, %2\n" + "addl $16, %3\n" + +/* central runs */ + "shrl $1, %4\n" + "jz 1f\n" + + "0:\n" + + /* set the current, current_pre, current_next registers */ + "movq -8(%1), %%mm0\n" + "movq (%1), %%mm7\n" + "movq 8(%1), %%mm1\n" + "psrlq $32, %%mm0\n" + "psllq $32, %%mm1\n" + "movq %%mm7, %%mm2\n" + "movq %%mm7, %%mm3\n" + "psllq $32, %%mm2\n" + "psrlq $32, %%mm3\n" + "por %%mm2, %%mm0\n" + "por %%mm3, %%mm1\n" + + /* current_upper */ + "movq (%0), %%mm6\n" + + /* compute the upper-left pixel for dst on %%mm2 */ + /* compute the upper-right pixel for dst on %%mm4 */ + "movq %%mm0, %%mm2\n" + "movq %%mm1, %%mm4\n" + "movq %%mm0, %%mm3\n" + "movq %%mm1, %%mm5\n" + "pcmpeqd %%mm6, %%mm2\n" + "pcmpeqd %%mm6, %%mm4\n" + "pcmpeqd (%2), %%mm3\n" + "pcmpeqd (%2), %%mm5\n" + "pandn %%mm2, %%mm3\n" + "pandn %%mm4, %%mm5\n" + "movq %%mm0, %%mm2\n" + "movq %%mm1, %%mm4\n" + "pcmpeqd %%mm1, %%mm2\n" + "pcmpeqd %%mm0, %%mm4\n" + "pandn %%mm3, %%mm2\n" + "pandn %%mm5, %%mm4\n" + "movq %%mm2, %%mm3\n" + "movq %%mm4, %%mm5\n" + "pand %%mm6, %%mm2\n" + "pand %%mm6, %%mm4\n" + "pandn %%mm7, %%mm3\n" + "pandn %%mm7, %%mm5\n" + "por %%mm3, %%mm2\n" + "por %%mm5, %%mm4\n" + + /* set *dst */ + "movq %%mm2, %%mm3\n" + "punpckldq %%mm4, %%mm2\n" + "punpckhdq %%mm4, %%mm3\n" + "movq %%mm2, (%3)\n" + "movq %%mm3, 8(%3)\n" + + /* next */ + "addl $8, %0\n" + "addl $8, %1\n" + "addl $8, %2\n" + "addl $16, %3\n" + + "decl %4\n" + "jnz 0b\n" + "1:\n" + +/* final run */ + /* set the current, current_pre, current_next registers */ + "movq (%1), %%mm1\n" + "movq (%1), %%mm7\n" + "movq -8(%1), %%mm0\n" + "psrlq $32, %%mm1\n" + "psrlq $32, %%mm0\n" + "psllq $32, %%mm1\n" + "movq %%mm7, %%mm2\n" + "movq %%mm7, %%mm3\n" + "psllq $32, %%mm2\n" + "psrlq $32, %%mm3\n" + "por %%mm2, %%mm0\n" + "por %%mm3, %%mm1\n" + + /* current_upper */ + "movq (%0), %%mm6\n" + + /* compute the upper-left pixel for dst on %%mm2 */ + /* compute the upper-right pixel for dst on %%mm4 */ + "movq %%mm0, %%mm2\n" + "movq %%mm1, %%mm4\n" + "movq %%mm0, %%mm3\n" + "movq %%mm1, %%mm5\n" + "pcmpeqd %%mm6, %%mm2\n" + "pcmpeqd %%mm6, %%mm4\n" + "pcmpeqd (%2), %%mm3\n" + "pcmpeqd (%2), %%mm5\n" + "pandn %%mm2, %%mm3\n" + "pandn %%mm4, %%mm5\n" + "movq %%mm0, %%mm2\n" + "movq %%mm1, %%mm4\n" + "pcmpeqd %%mm1, %%mm2\n" + "pcmpeqd %%mm0, %%mm4\n" + "pandn %%mm3, %%mm2\n" + "pandn %%mm5, %%mm4\n" + "movq %%mm2, %%mm3\n" + "movq %%mm4, %%mm5\n" + "pand %%mm6, %%mm2\n" + "pand %%mm6, %%mm4\n" + "pandn %%mm7, %%mm3\n" + "pandn %%mm7, %%mm5\n" + "por %%mm3, %%mm2\n" + "por %%mm5, %%mm4\n" + + /* set *dst */ + "movq %%mm2, %%mm3\n" + "punpckldq %%mm4, %%mm2\n" + "punpckhdq %%mm4, %%mm3\n" + "movq %%mm2, (%3)\n" + "movq %%mm3, 8(%3)\n" + + : "+r" (src0), "+r" (src1), "+r" (src2), "+r" (dst), "+r" (count) + : + : "cc" + ); +} + +/** + * Scale by a factor of 2 a row of pixels of 8 bits. + * This is a very fast MMX implementation. + * The implementation uses a combination of cmp/and/not operations to + * completly remove the need of conditional jumps. This trick give the + * major speed improvement. + * Also, using the 8 bytes MMX registers more than one pixel are computed + * at the same time. + * Before calling this function you must ensure that the currenct CPU supports + * the MMX instruction set. After calling it you must be sure to call the EMMS + * instruction before any floating-point operation. + * The pixels over the left and right borders are assumed of the same color of + * the pixels on the border. + * \param src0 Pointer at the first pixel of the previous row. + * \param src1 Pointer at the first pixel of the current row. + * \param src2 Pointer at the first pixel of the next row. + * \param count Length in pixels of the src0, src1 and src2 rows. It must + * be at least 16 and a multiple of 8. + * \param dst0 First destination row, double length in pixels. + * \param dst1 Second destination row, double length in pixels. + */ +void scale2x_8_mmx(scale2x_uint8* dst0, scale2x_uint8* dst1, const scale2x_uint8* src0, const scale2x_uint8* src1, const scale2x_uint8* src2, unsigned count) +{ + if (count % 8 != 0 || count < 16) { + scale2x_8_def(dst0, dst1, src0, src1, src2, count); + } else { + assert(count >= 16); + assert(count % 8 == 0); + + scale2x_8_mmx_single(dst0, src0, src1, src2, count); + scale2x_8_mmx_single(dst1, src2, src1, src0, count); + } +} + +/** + * Scale by a factor of 2 a row of pixels of 16 bits. + * This function operates like scale2x_8_mmx() but for 16 bits pixels. + * \param src0 Pointer at the first pixel of the previous row. + * \param src1 Pointer at the first pixel of the current row. + * \param src2 Pointer at the first pixel of the next row. + * \param count Length in pixels of the src0, src1 and src2 rows. It must + * be at least 8 and a multiple of 4. + * \param dst0 First destination row, double length in pixels. + * \param dst1 Second destination row, double length in pixels. + */ +void scale2x_16_mmx(scale2x_uint16* dst0, scale2x_uint16* dst1, const scale2x_uint16* src0, const scale2x_uint16* src1, const scale2x_uint16* src2, unsigned count) +{ + if (count % 4 != 0 || count < 8) { + scale2x_16_def(dst0, dst1, src0, src1, src2, count); + } else { + assert(count >= 8); + assert(count % 4 == 0); + + scale2x_16_mmx_single(dst0, src0, src1, src2, count); + scale2x_16_mmx_single(dst1, src2, src1, src0, count); + } +} + +/** + * Scale by a factor of 2 a row of pixels of 32 bits. + * This function operates like scale2x_8_mmx() but for 32 bits pixels. + * \param src0 Pointer at the first pixel of the previous row. + * \param src1 Pointer at the first pixel of the current row. + * \param src2 Pointer at the first pixel of the next row. + * \param count Length in pixels of the src0, src1 and src2 rows. It must + * be at least 4 and a multiple of 2. + * \param dst0 First destination row, double length in pixels. + * \param dst1 Second destination row, double length in pixels. + */ +void scale2x_32_mmx(scale2x_uint32* dst0, scale2x_uint32* dst1, const scale2x_uint32* src0, const scale2x_uint32* src1, const scale2x_uint32* src2, unsigned count) +{ + if (count % 2 != 0 || count < 4) { + scale2x_32_def(dst0, dst1, src0, src1, src2, count); + } else { + assert(count >= 4); + assert(count % 2 == 0); + + scale2x_32_mmx_single(dst0, src0, src1, src2, count); + scale2x_32_mmx_single(dst1, src2, src1, src0, count); + } +} + +#endif + diff --git a/common/scaler/scale2x.h b/common/scaler/scale2x.h new file mode 100644 index 0000000000..54bfac5b8f --- /dev/null +++ b/common/scaler/scale2x.h @@ -0,0 +1,52 @@ +/* + * This file is part of the Scale2x project. + * + * Copyright (C) 2001, 2002, 2003, 2004 Andrea Mazzoleni + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef __SCALE2X_H +#define __SCALE2X_H + +typedef unsigned char scale2x_uint8; +typedef unsigned short scale2x_uint16; +typedef unsigned scale2x_uint32; + +void scale2x_8_def(scale2x_uint8* dst0, scale2x_uint8* dst1, const scale2x_uint8* src0, const scale2x_uint8* src1, const scale2x_uint8* src2, unsigned count); +void scale2x_16_def(scale2x_uint16* dst0, scale2x_uint16* dst1, const scale2x_uint16* src0, const scale2x_uint16* src1, const scale2x_uint16* src2, unsigned count); +void scale2x_32_def(scale2x_uint32* dst0, scale2x_uint32* dst1, const scale2x_uint32* src0, const scale2x_uint32* src1, const scale2x_uint32* src2, unsigned count); + +#if defined(__GNUC__) && defined(__i386__) + +void scale2x_8_mmx(scale2x_uint8* dst0, scale2x_uint8* dst1, const scale2x_uint8* src0, const scale2x_uint8* src1, const scale2x_uint8* src2, unsigned count); +void scale2x_16_mmx(scale2x_uint16* dst0, scale2x_uint16* dst1, const scale2x_uint16* src0, const scale2x_uint16* src1, const scale2x_uint16* src2, unsigned count); +void scale2x_32_mmx(scale2x_uint32* dst0, scale2x_uint32* dst1, const scale2x_uint32* src0, const scale2x_uint32* src1, const scale2x_uint32* src2, unsigned count); + +/** + * End the use of the MMX instructions. + * This function must be called before using any floating-point operations. + */ +static inline void scale2x_mmx_emms(void) +{ + __asm__ __volatile__ ( + "emms" + ); +} + +#endif + +#endif + diff --git a/common/scaler/scale3x.cpp b/common/scaler/scale3x.cpp new file mode 100644 index 0000000000..16e484d02b --- /dev/null +++ b/common/scaler/scale3x.cpp @@ -0,0 +1,386 @@ +/* + * This file is part of the Scale2x project. + * + * Copyright (C) 2001, 2002, 2003, 2004 Andrea Mazzoleni + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +/* + * This file contains a C and MMX implementation of the Scale2x effect. + * + * You can find an high level description of the effect at : + * + * http://scale2x.sourceforge.net/ + * + * Alternatively at the previous license terms, you are allowed to use this + * code in your program with these conditions: + * - the program is not used in commercial activities. + * - the whole source code of the program is released with the binary. + * - derivative works of the program are allowed. + */ + +#if HAVE_CONFIG_H +#include <config.h> +#endif + +#include "scale3x.h" + +#include <assert.h> + +/***************************************************************************/ +/* Scale3x C implementation */ + +static inline void scale3x_8_def_border(scale3x_uint8* __restrict__ dst, const scale3x_uint8* __restrict__ src0, const scale3x_uint8* __restrict__ src1, const scale3x_uint8* __restrict__ src2, unsigned count) +{ + assert(count >= 2); + + /* first pixel */ + dst[0] = src1[0]; + dst[1] = src1[0]; + if (src1[1] == src0[0] && src2[0] != src0[0]) + dst[2] = src0[0]; + else + dst[2] = src1[0]; + ++src0; + ++src1; + ++src2; + dst += 3; + + /* central pixels */ + count -= 2; + while (count) { + if (src0[0] != src2[0] && src1[-1] != src1[1]) { + dst[0] = src1[-1] == src0[0] ? src1[-1] : src1[0]; + dst[1] = (src1[-1] == src0[0] && src1[0] != src0[1]) || (src1[1] == src0[0] && src1[0] != src0[-1]) ? src0[0] : src1[0]; + dst[2] = src1[1] == src0[0] ? src1[1] : src1[0]; + } else { + dst[0] = src1[0]; + dst[1] = src1[0]; + dst[2] = src1[0]; + } + + ++src0; + ++src1; + ++src2; + dst += 3; + --count; + } + + /* last pixel */ + if (src1[-1] == src0[0] && src2[0] != src0[0]) + dst[0] = src0[0]; + else + dst[0] = src1[0]; + dst[1] = src1[0]; + dst[2] = src1[0]; +} + +static inline void scale3x_8_def_center(scale3x_uint8* __restrict__ dst, const scale3x_uint8* __restrict__ src0, const scale3x_uint8* __restrict__ src1, const scale3x_uint8* __restrict__ src2, unsigned count) +{ + assert(count >= 2); + + /* first pixel */ + dst[0] = src1[0]; + dst[1] = src1[0]; + if (src0[0] != src2[0]) { + dst[2] = (src1[1] == src0[0] && src1[0] != src2[1]) || (src1[1] == src2[0] && src1[0] != src0[1]) ? src1[1] : src1[0]; + } else { + dst[2] = src1[0]; + } + ++src0; + ++src1; + ++src2; + dst += 3; + + /* central pixels */ + count -= 2; + while (count) { + if (src0[0] != src2[0] && src1[-1] != src1[1]) { + dst[0] = (src1[-1] == src0[0] && src1[0] != src2[-1]) || (src1[-1] == src2[0] && src1[0] != src0[-1]) ? src1[-1] : src1[0]; + dst[1] = src1[0]; + dst[2] = (src1[1] == src0[0] && src1[0] != src2[1]) || (src1[1] == src2[0] && src1[0] != src0[1]) ? src1[1] : src1[0]; + } else { + dst[0] = src1[0]; + dst[1] = src1[0]; + dst[2] = src1[0]; + } + + ++src0; + ++src1; + ++src2; + dst += 3; + --count; + } + + /* last pixel */ + if (src0[0] != src2[0]) { + dst[0] = (src1[-1] == src0[0] && src1[0] != src2[-1]) || (src1[-1] == src2[0] && src1[0] != src0[-1]) ? src1[-1] : src1[0]; + } else { + dst[0] = src1[0]; + } + dst[1] = src1[0]; + dst[2] = src1[0]; +} + +static inline void scale3x_16_def_border(scale3x_uint16* __restrict__ dst, const scale3x_uint16* __restrict__ src0, const scale3x_uint16* __restrict__ src1, const scale3x_uint16* __restrict__ src2, unsigned count) +{ + assert(count >= 2); + + /* first pixel */ + dst[0] = src1[0]; + dst[1] = src1[0]; + if (src1[1] == src0[0] && src2[0] != src0[0]) + dst[2] = src0[0]; + else + dst[2] = src1[0]; + ++src0; + ++src1; + ++src2; + dst += 3; + + /* central pixels */ + count -= 2; + while (count) { + if (src0[0] != src2[0] && src1[-1] != src1[1]) { + dst[0] = src1[-1] == src0[0] ? src1[-1] : src1[0]; + dst[1] = (src1[-1] == src0[0] && src1[0] != src0[1]) || (src1[1] == src0[0] && src1[0] != src0[-1]) ? src0[0] : src1[0]; + dst[2] = src1[1] == src0[0] ? src1[1] : src1[0]; + } else { + dst[0] = src1[0]; + dst[1] = src1[0]; + dst[2] = src1[0]; + } + + ++src0; + ++src1; + ++src2; + dst += 3; + --count; + } + + /* last pixel */ + if (src1[-1] == src0[0] && src2[0] != src0[0]) + dst[0] = src0[0]; + else + dst[0] = src1[0]; + dst[1] = src1[0]; + dst[2] = src1[0]; +} + +static inline void scale3x_16_def_center(scale3x_uint16* __restrict__ dst, const scale3x_uint16* __restrict__ src0, const scale3x_uint16* __restrict__ src1, const scale3x_uint16* __restrict__ src2, unsigned count) +{ + assert(count >= 2); + + /* first pixel */ + dst[0] = src1[0]; + dst[1] = src1[0]; + if (src0[0] != src2[0]) { + dst[2] = (src1[1] == src0[0] && src1[0] != src2[1]) || (src1[1] == src2[0] && src1[0] != src0[1]) ? src1[1] : src1[0]; + } else { + dst[2] = src1[0]; + } + ++src0; + ++src1; + ++src2; + dst += 3; + + /* central pixels */ + count -= 2; + while (count) { + if (src0[0] != src2[0] && src1[-1] != src1[1]) { + dst[0] = (src1[-1] == src0[0] && src1[0] != src2[-1]) || (src1[-1] == src2[0] && src1[0] != src0[-1]) ? src1[-1] : src1[0]; + dst[1] = src1[0]; + dst[2] = (src1[1] == src0[0] && src1[0] != src2[1]) || (src1[1] == src2[0] && src1[0] != src0[1]) ? src1[1] : src1[0]; + } else { + dst[0] = src1[0]; + dst[1] = src1[0]; + dst[2] = src1[0]; + } + + ++src0; + ++src1; + ++src2; + dst += 3; + --count; + } + + /* last pixel */ + if (src0[0] != src2[0]) { + dst[0] = (src1[-1] == src0[0] && src1[0] != src2[-1]) || (src1[-1] == src2[0] && src1[0] != src0[-1]) ? src1[-1] : src1[0]; + } else { + dst[0] = src1[0]; + } + dst[1] = src1[0]; + dst[2] = src1[0]; +} + +static inline void scale3x_32_def_border(scale3x_uint32* __restrict__ dst, const scale3x_uint32* __restrict__ src0, const scale3x_uint32* __restrict__ src1, const scale3x_uint32* __restrict__ src2, unsigned count) +{ + assert(count >= 2); + + /* first pixel */ + dst[0] = src1[0]; + dst[1] = src1[0]; + if (src1[1] == src0[0] && src2[0] != src0[0]) + dst[2] = src0[0]; + else + dst[2] = src1[0]; + ++src0; + ++src1; + ++src2; + dst += 3; + + /* central pixels */ + count -= 2; + while (count) { + if (src0[0] != src2[0] && src1[-1] != src1[1]) { + dst[0] = src1[-1] == src0[0] ? src1[-1] : src1[0]; + dst[1] = (src1[-1] == src0[0] && src1[0] != src0[1]) || (src1[1] == src0[0] && src1[0] != src0[-1]) ? src0[0] : src1[0]; + dst[2] = src1[1] == src0[0] ? src1[1] : src1[0]; + } else { + dst[0] = src1[0]; + dst[1] = src1[0]; + dst[2] = src1[0]; + } + + ++src0; + ++src1; + ++src2; + dst += 3; + --count; + } + + /* last pixel */ + if (src1[-1] == src0[0] && src2[0] != src0[0]) + dst[0] = src0[0]; + else + dst[0] = src1[0]; + dst[1] = src1[0]; + dst[2] = src1[0]; +} + +static inline void scale3x_32_def_center(scale3x_uint32* __restrict__ dst, const scale3x_uint32* __restrict__ src0, const scale3x_uint32* __restrict__ src1, const scale3x_uint32* __restrict__ src2, unsigned count) +{ + assert(count >= 2); + + /* first pixel */ + dst[0] = src1[0]; + dst[1] = src1[0]; + if (src0[0] != src2[0]) { + dst[2] = (src1[1] == src0[0] && src1[0] != src2[1]) || (src1[1] == src2[0] && src1[0] != src0[1]) ? src1[1] : src1[0]; + } else { + dst[2] = src1[0]; + } + ++src0; + ++src1; + ++src2; + dst += 3; + + /* central pixels */ + count -= 2; + while (count) { + if (src0[0] != src2[0] && src1[-1] != src1[1]) { + dst[0] = (src1[-1] == src0[0] && src1[0] != src2[-1]) || (src1[-1] == src2[0] && src1[0] != src0[-1]) ? src1[-1] : src1[0]; + dst[1] = src1[0]; + dst[2] = (src1[1] == src0[0] && src1[0] != src2[1]) || (src1[1] == src2[0] && src1[0] != src0[1]) ? src1[1] : src1[0]; + } else { + dst[0] = src1[0]; + dst[1] = src1[0]; + dst[2] = src1[0]; + } + + ++src0; + ++src1; + ++src2; + dst += 3; + --count; + } + + /* last pixel */ + if (src0[0] != src2[0]) { + dst[0] = (src1[-1] == src0[0] && src1[0] != src2[-1]) || (src1[-1] == src2[0] && src1[0] != src0[-1]) ? src1[-1] : src1[0]; + } else { + dst[0] = src1[0]; + } + dst[1] = src1[0]; + dst[2] = src1[0]; +} + +/** + * Scale by a factor of 3 a row of pixels of 8 bits. + * The function is implemented in C. + * The pixels over the left and right borders are assumed of the same color of + * the pixels on the border. + * \param src0 Pointer at the first pixel of the previous row. + * \param src1 Pointer at the first pixel of the current row. + * \param src2 Pointer at the first pixel of the next row. + * \param count Length in pixels of the src0, src1 and src2 rows. + * It must be at least 2. + * \param dst0 First destination row, triple length in pixels. + * \param dst1 Second destination row, triple length in pixels. + * \param dst2 Third destination row, triple length in pixels. + */ +void scale3x_8_def(scale3x_uint8* dst0, scale3x_uint8* dst1, scale3x_uint8* dst2, const scale3x_uint8* src0, const scale3x_uint8* src1, const scale3x_uint8* src2, unsigned count) +{ + assert(count >= 2); + + scale3x_8_def_border(dst0, src0, src1, src2, count); + scale3x_8_def_center(dst1, src0, src1, src2, count); + scale3x_8_def_border(dst2, src2, src1, src0, count); +} + +/** + * Scale by a factor of 3 a row of pixels of 16 bits. + * This function operates like scale3x_8_def() but for 16 bits pixels. + * \param src0 Pointer at the first pixel of the previous row. + * \param src1 Pointer at the first pixel of the current row. + * \param src2 Pointer at the first pixel of the next row. + * \param count Length in pixels of the src0, src1 and src2 rows. + * It must be at least 2. + * \param dst0 First destination row, triple length in pixels. + * \param dst1 Second destination row, triple length in pixels. + * \param dst2 Third destination row, triple length in pixels. + */ +void scale3x_16_def(scale3x_uint16* dst0, scale3x_uint16* dst1, scale3x_uint16* dst2, const scale3x_uint16* src0, const scale3x_uint16* src1, const scale3x_uint16* src2, unsigned count) +{ + assert(count >= 2); + + scale3x_16_def_border(dst0, src0, src1, src2, count); + scale3x_16_def_center(dst1, src0, src1, src2, count); + scale3x_16_def_border(dst2, src2, src1, src0, count); +} + +/** + * Scale by a factor of 3 a row of pixels of 32 bits. + * This function operates like scale3x_8_def() but for 32 bits pixels. + * \param src0 Pointer at the first pixel of the previous row. + * \param src1 Pointer at the first pixel of the current row. + * \param src2 Pointer at the first pixel of the next row. + * \param count Length in pixels of the src0, src1 and src2 rows. + * It must be at least 2. + * \param dst0 First destination row, triple length in pixels. + * \param dst1 Second destination row, triple length in pixels. + * \param dst2 Third destination row, triple length in pixels. + */ +void scale3x_32_def(scale3x_uint32* dst0, scale3x_uint32* dst1, scale3x_uint32* dst2, const scale3x_uint32* src0, const scale3x_uint32* src1, const scale3x_uint32* src2, unsigned count) +{ + assert(count >= 2); + + scale3x_32_def_border(dst0, src0, src1, src2, count); + scale3x_32_def_center(dst1, src0, src1, src2, count); + scale3x_32_def_border(dst2, src2, src1, src0, count); +} + diff --git a/common/scaler/scale3x.h b/common/scaler/scale3x.h new file mode 100644 index 0000000000..14655d00fa --- /dev/null +++ b/common/scaler/scale3x.h @@ -0,0 +1,33 @@ +/* + * This file is part of the Scale2x project. + * + * Copyright (C) 2001, 2002, 2003, 2004 Andrea Mazzoleni + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef __SCALE3X_H +#define __SCALE3X_H + +typedef unsigned char scale3x_uint8; +typedef unsigned short scale3x_uint16; +typedef unsigned scale3x_uint32; + +void scale3x_8_def(scale3x_uint8* dst0, scale3x_uint8* dst1, scale3x_uint8* dst2, const scale3x_uint8* src0, const scale3x_uint8* src1, const scale3x_uint8* src2, unsigned count); +void scale3x_16_def(scale3x_uint16* dst0, scale3x_uint16* dst1, scale3x_uint16* dst2, const scale3x_uint16* src0, const scale3x_uint16* src1, const scale3x_uint16* src2, unsigned count); +void scale3x_32_def(scale3x_uint32* dst0, scale3x_uint32* dst1, scale3x_uint32* dst2, const scale3x_uint32* src0, const scale3x_uint32* src1, const scale3x_uint32* src2, unsigned count); + +#endif + diff --git a/common/scaler/scalebit.cpp b/common/scaler/scalebit.cpp new file mode 100644 index 0000000000..d540ca7317 --- /dev/null +++ b/common/scaler/scalebit.cpp @@ -0,0 +1,391 @@ +/* + * This file is part of the Scale2x project. + * + * Copyright (C) 2003 Andrea Mazzoleni + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +/* + * This file contains an example implementation of the Scale effect + * applyed to a generic bitmap. + * + * You can find an high level description of the effect at : + * + * http://scale2x.sourceforge.net/ + * + * Alternatively at the previous license terms, you are allowed to use this + * code in your program with these conditions: + * - the program is not used in commercial activities. + * - the whole source code of the program is released with the binary. + * - derivative works of the program are allowed. + */ + +#if HAVE_CONFIG_H +#include <config.h> +#endif + +#define HAVE_ALLOCA 1 +#define HAVE_ALLOCA_H 1 + +#include "scale2x.h" +#include "scale3x.h" + +#if HAVE_ALLOCA_H +#include <alloca.h> +#endif + +#include <assert.h> +#include <stdlib.h> + +#define DST(bits, num) (scale2x_uint ## bits *)dst ## num +#define SRC(bits, num) (const scale2x_uint ## bits *)src ## num + +/** + * Apply the Scale2x effect on a group of rows. Used internally. + */ +static inline void stage_scale2x(void* dst0, void* dst1, const void* src0, const void* src1, const void* src2, unsigned pixel, unsigned pixel_per_row) +{ + switch (pixel) { +#if defined(__GNUC__) && defined(__i386__) + case 1 : scale2x_8_mmx(DST(8,0), DST(8,1), SRC(8,0), SRC(8,1), SRC(8,2), pixel_per_row); break; + case 2 : scale2x_16_mmx(DST(8,0), DST(16,1), SRC(16,0), SRC(16,1), SRC(16,2), pixel_per_row); break; + case 4 : scale2x_32_mmx(DST(32,0), DST(32,1), SRC(32,0), SRC(32,1), SRC(32,2), pixel_per_row); break; +#else + case 1 : scale2x_8_def(DST(8,0), DST(8,1), SRC(8,0), SRC(8,1), SRC(8,2), pixel_per_row); break; + case 2 : scale2x_16_def(DST(16,0), DST(16,1), SRC(16,0), SRC(16,1), SRC(16,2), pixel_per_row); break; + case 4 : scale2x_32_def(DST(32,0), DST(32,1), SRC(32,0), SRC(32,1), SRC(32,2), pixel_per_row); break; +#endif + } +} + +/** + * Apply the Scale3x effect on a group of rows. Used internally. + */ +static inline void stage_scale3x(void* dst0, void* dst1, void* dst2, const void* src0, const void* src1, const void* src2, unsigned pixel, unsigned pixel_per_row) +{ + switch (pixel) { + case 1 : scale3x_8_def(DST(8,0), DST(8,1), DST(8,2), SRC(8,0), SRC(8,1), SRC(8,2), pixel_per_row); break; + case 2 : scale3x_16_def(DST(16,0), DST(16,1), DST(16,2), SRC(16,0), SRC(16,1), SRC(16,2), pixel_per_row); break; + case 4 : scale3x_32_def(DST(32,0), DST(32,1), DST(32,2), SRC(32,0), SRC(32,1), SRC(32,2), pixel_per_row); break; + } +} + +/** + * Apply the Scale4x effect on a group of rows. Used internally. + */ +static inline void stage_scale4x(void* dst0, void* dst1, void* dst2, void* dst3, const void* src0, const void* src1, const void* src2, const void* src3, unsigned pixel, unsigned pixel_per_row) +{ + stage_scale2x(dst0, dst1, src0, src1, src2, pixel, 2 * pixel_per_row); + stage_scale2x(dst2, dst3, src1, src2, src3, pixel, 2 * pixel_per_row); +} + +#define SCDST(i) (dst+(i)*dst_slice) +#define SCSRC(i) (src+(i)*src_slice) +#define SCMID(i) (mid[(i)]) + +/** + * Apply the Scale2x effect on a bitmap. + * The destination bitmap is filled with the scaled version of the source bitmap. + * The source bitmap isn't modified. + * The destination bitmap must be manually allocated before calling the function, + * note that the resulting size is exactly 2x2 times the size of the source bitmap. + * \param void_dst Pointer at the first pixel of the destination bitmap. + * \param dst_slice Size in bytes of a destination bitmap row. + * \param void_src Pointer at the first pixel of the source bitmap. + * \param src_slice Size in bytes of a source bitmap row. + * \param pixel Bytes per pixel of the source and destination bitmap. + * \param width Horizontal size in pixels of the source bitmap. + * \param height Vertical size in pixels of the source bitmap. + */ +static void scale2x(void* void_dst, unsigned dst_slice, const void* void_src, unsigned src_slice, unsigned pixel, unsigned width, unsigned height) +{ + unsigned char* dst = (unsigned char*)void_dst; + const unsigned char* src = (const unsigned char*)void_src; + unsigned count; + + assert(height >= 2); + + count = height; + + stage_scale2x(SCDST(0), SCDST(1), SCSRC(0), SCSRC(0), SCSRC(1), pixel, width); + + dst = SCDST(2); + + count -= 2; + while (count) { + stage_scale2x(SCDST(0), SCDST(1), SCSRC(0), SCSRC(1), SCSRC(2), pixel, width); + + dst = SCDST(2); + src = SCSRC(1); + + --count; + } + + stage_scale2x(SCDST(0), SCDST(1), SCSRC(1-1), SCSRC(2-1), SCSRC(2-1), pixel, width); + +#if defined(__GNUC__) && defined(__i386__) + scale2x_mmx_emms(); +#endif +} + +/** + * Apply the Scale32x effect on a bitmap. + * The destination bitmap is filled with the scaled version of the source bitmap. + * The source bitmap isn't modified. + * The destination bitmap must be manually allocated before calling the function, + * note that the resulting size is exactly 3x3 times the size of the source bitmap. + * \param void_dst Pointer at the first pixel of the destination bitmap. + * \param dst_slice Size in bytes of a destination bitmap row. + * \param void_src Pointer at the first pixel of the source bitmap. + * \param src_slice Size in bytes of a source bitmap row. + * \param pixel Bytes per pixel of the source and destination bitmap. + * \param width Horizontal size in pixels of the source bitmap. + * \param height Vertical size in pixels of the source bitmap. + */ +static void scale3x(void* void_dst, unsigned dst_slice, const void* void_src, unsigned src_slice, unsigned pixel, unsigned width, unsigned height) +{ + unsigned char* dst = (unsigned char*)void_dst; + const unsigned char* src = (const unsigned char*)void_src; + unsigned count; + + assert(height >= 2); + + count = height; + + stage_scale3x(SCDST(0), SCDST(1), SCDST(2), SCSRC(0), SCSRC(0), SCSRC(1), pixel, width); + + dst = SCDST(3); + + count -= 2; + while (count) { + stage_scale3x(SCDST(0), SCDST(1), SCDST(2), SCSRC(0), SCSRC(1), SCSRC(2), pixel, width); + + dst = SCDST(3); + src = SCSRC(1); + + --count; + } + + stage_scale3x(SCDST(0), SCDST(1), SCDST(2), SCSRC(1-1), SCSRC(2-1), SCSRC(2-1), pixel, width); +} + +/** + * Apply the Scale4x effect on a bitmap. + * The destination bitmap is filled with the scaled version of the source bitmap. + * The source bitmap isn't modified. + * The destination bitmap must be manually allocated before calling the function, + * note that the resulting size is exactly 4x4 times the size of the source bitmap. + * \note This function requires also a small buffer bitmap used internally to store + * intermediate results. This bitmap must have at least an horizontal size in bytes of 2*width*pixel, + * and a vertical size of 6 rows. The memory of this buffer must not be allocated + * in video memory because it's also read and not only written. Generally + * a heap (malloc) or a stack (alloca) buffer is the best choices. + * \param void_dst Pointer at the first pixel of the destination bitmap. + * \param dst_slice Size in bytes of a destination bitmap row. + * \param void_mid Pointer at the first pixel of the buffer bitmap. + * \param mid_slice Size in bytes of a buffer bitmap row. + * \param void_src Pointer at the first pixel of the source bitmap. + * \param src_slice Size in bytes of a source bitmap row. + * \param pixel Bytes per pixel of the source and destination bitmap. + * \param width Horizontal size in pixels of the source bitmap. + * \param height Vertical size in pixels of the source bitmap. + */ +static void scale4x_buf(void* void_dst, unsigned dst_slice, void* void_mid, unsigned mid_slice, const void* void_src, unsigned src_slice, unsigned pixel, unsigned width, unsigned height) +{ + unsigned char* dst = (unsigned char*)void_dst; + const unsigned char* src = (const unsigned char*)void_src; + unsigned count; + unsigned char* mid[6]; + + assert(height >= 4); + + count = height; + + /* set the 6 buffer pointers */ + mid[0] = (unsigned char*)void_mid; + mid[1] = mid[0] + mid_slice; + mid[2] = mid[1] + mid_slice; + mid[3] = mid[2] + mid_slice; + mid[4] = mid[3] + mid_slice; + mid[5] = mid[4] + mid_slice; + + stage_scale2x(SCMID(-2+6), SCMID(-1+6), SCSRC(0), SCSRC(0), SCSRC(1), pixel, width); + stage_scale2x(SCMID(0), SCMID(1), SCSRC(0), SCSRC(1), SCSRC(2), pixel, width); + stage_scale2x(SCMID(2), SCMID(3), SCSRC(1), SCSRC(2), SCSRC(3), pixel, width); + stage_scale4x(SCDST(0), SCDST(1), SCDST(2), SCDST(3), SCMID(-2+6), SCMID(-2+6), SCMID(-1+6), SCMID(0), pixel, width); + + dst = SCDST(4); + + stage_scale4x(SCDST(0), SCDST(1), SCDST(2), SCDST(3), SCMID(-1+6), SCMID(0), SCMID(1), SCMID(2), pixel, width); + + dst = SCDST(4); + + count -= 4; + while (count) { + unsigned char* tmp; + + stage_scale2x(SCMID(4), SCMID(5), SCSRC(2), SCSRC(3), SCSRC(4), pixel, width); + stage_scale4x(SCDST(0), SCDST(1), SCDST(2), SCDST(3), SCMID(1), SCMID(2), SCMID(3), SCMID(4), pixel, width); + + dst = SCDST(4); + src = SCSRC(1); + + tmp = SCMID(0); /* shift by 2 position */ + SCMID(0) = SCMID(2); + SCMID(2) = SCMID(4); + SCMID(4) = tmp; + tmp = SCMID(1); + SCMID(1) = SCMID(3); + SCMID(3) = SCMID(5); + SCMID(5) = tmp; + + --count; + } + + stage_scale2x(SCMID(4), SCMID(5), SCSRC(2), SCSRC(3), SCSRC(3), pixel, width); + stage_scale4x(SCDST(0), SCDST(1), SCDST(2), SCDST(3), SCMID(1), SCMID(2), SCMID(3), SCMID(4), pixel, width); + + dst = SCDST(4); + + stage_scale4x(SCDST(0), SCDST(1), SCDST(2), SCDST(3), SCMID(3), SCMID(4), SCMID(5), SCMID(5), pixel, width); + +#if defined(__GNUC__) && defined(__i386__) + scale2x_mmx_emms(); +#endif +} + +/** + * Apply the Scale4x effect on a bitmap. + * The destination bitmap is filled with the scaled version of the source bitmap. + * The source bitmap isn't modified. + * The destination bitmap must be manually allocated before calling the function, + * note that the resulting size is exactly 4x4 times the size of the source bitmap. + * \note This function operates like ::scale4x_buf() but the intermediate buffer is + * automatically allocated in the stack. + * \param void_dst Pointer at the first pixel of the destination bitmap. + * \param dst_slice Size in bytes of a destination bitmap row. + * \param void_src Pointer at the first pixel of the source bitmap. + * \param src_slice Size in bytes of a source bitmap row. + * \param pixel Bytes per pixel of the source and destination bitmap. + * \param width Horizontal size in pixels of the source bitmap. + * \param height Vertical size in pixels of the source bitmap. + */ +static void scale4x(void* void_dst, unsigned dst_slice, const void* void_src, unsigned src_slice, unsigned pixel, unsigned width, unsigned height) +{ + unsigned mid_slice; + void* mid; + + mid_slice = 2 * pixel * width; /* required space for 1 row buffer */ + + mid_slice = (mid_slice + 0x7) & ~0x7; /* align to 8 bytes */ + +#if HAVE_ALLOCA + mid = alloca(6 * mid_slice); /* allocate space for 6 row buffers */ + + assert(mid != 0); /* alloca should never fails */ +#else + mid = malloc(6 * mid_slice); /* allocate space for 6 row buffers */ + + if (!mid) + return; +#endif + + scale4x_buf(void_dst, dst_slice, mid, mid_slice, void_src, src_slice, pixel, width, height); + +#if !HAVE_ALLOCA + free(mid); +#endif +} + +/** + * Check if the scale implementation is applicable at the given arguments. + * \param scale Scale factor. 2, 3 or 4. + * \param pixel Bytes per pixel of the source and destination bitmap. + * \param width Horizontal size in pixels of the source bitmap. + * \param height Vertical size in pixels of the source bitmap. + * \return + * - -1 on precondition violated. + * - 0 on success. + */ +int scale_precondition(unsigned scale, unsigned pixel, unsigned width, unsigned height) +{ + if (scale != 2 && scale != 3 && scale != 4) + return -1; + + if (pixel != 1 && pixel != 2 && pixel != 4) + return -1; + + switch (scale) { + case 2 : + case 3 : + if (height < 2) + return -1; + break; + case 4 : + if (height < 4) + return -1; + break; + } + +#if defined(__GNUC__) && defined(__i386__) + switch (scale) { + case 2 : + case 4 : + if (width < (16 / pixel)) + return -1; + if (width % (8 / pixel) != 0) + return -1; + break; + case 3 : + if (width < 2) + return -1; + break; + } +#else + if (width < 2) + return -1; +#endif + + return 0; +} + +/** + * Apply the Scale effect on a bitmap. + * This function is simply a common interface for ::scale2x(), ::scale3x() and ::scale4x(). + * \param scale Scale factor. 2, 3 or 4. + * \param void_dst Pointer at the first pixel of the destination bitmap. + * \param dst_slice Size in bytes of a destination bitmap row. + * \param void_src Pointer at the first pixel of the source bitmap. + * \param src_slice Size in bytes of a source bitmap row. + * \param pixel Bytes per pixel of the source and destination bitmap. + * \param width Horizontal size in pixels of the source bitmap. + * \param height Vertical size in pixels of the source bitmap. + */ +void scale(unsigned scale, void* void_dst, unsigned dst_slice, const void* void_src, unsigned src_slice, unsigned pixel, unsigned width, unsigned height) +{ + switch (scale) { + case 2 : + scale2x(void_dst, dst_slice, void_src, src_slice, pixel, width, height); + break; + case 3 : + scale3x(void_dst, dst_slice, void_src, src_slice, pixel, width, height); + break; + case 4 : + scale4x(void_dst, dst_slice, void_src, src_slice, pixel, width, height); + break; + } +} + diff --git a/common/scaler/scalebit.h b/common/scaler/scalebit.h new file mode 100644 index 0000000000..dd46883f97 --- /dev/null +++ b/common/scaler/scalebit.h @@ -0,0 +1,43 @@ +/* + * This file is part of the Scale2x project. + * + * Copyright (C) 2003 Andrea Mazzoleni + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +/* + * This file contains an example implementation of the Scale effect + * applyed to a generic bitmap. + * + * You can find an high level description of the effect at : + * + * http://scale2x.sourceforge.net/ + * + * Alternatively at the previous license terms, you are allowed to use this + * code in your program with these conditions: + * - the program is not used in commercial activities. + * - the whole source code of the program is released with the binary. + * - derivative works of the program are allowed. + */ + +#ifndef __SCALEBIT_H +#define __SCALEBIT_H + +int scale_precondition(unsigned scale, unsigned pixel, unsigned width, unsigned height); +void scale(unsigned scale, void* void_dst, unsigned dst_slice, const void* void_src, unsigned src_slice, unsigned pixel, unsigned width, unsigned height); + +#endif + |