| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2025 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_surface_c.h" |
| |
| static bool SDL_StretchSurfaceUncheckedNearest(SDL_Surface *src, const SDL_Rect *srcrect, SDL_Surface *dst, const SDL_Rect *dstrect); |
| static bool SDL_StretchSurfaceUncheckedLinear(SDL_Surface *src, const SDL_Rect *srcrect, SDL_Surface *dst, const SDL_Rect *dstrect); |
| |
| bool SDL_StretchSurface(SDL_Surface *src, const SDL_Rect *srcrect, SDL_Surface *dst, const SDL_Rect *dstrect, SDL_ScaleMode scaleMode) |
| { |
| bool result; |
| int src_locked; |
| int dst_locked; |
| SDL_Rect full_src; |
| SDL_Rect full_dst; |
| |
| if (!src) { |
| return SDL_InvalidParamError("src"); |
| } |
| if (!dst) { |
| return SDL_InvalidParamError("dst"); |
| } |
| |
| if (src->format != dst->format) { |
| // Slow! |
| SDL_Surface *src_tmp = SDL_ConvertSurfaceAndColorspace(src, dst->format, dst->palette, dst->colorspace, dst->props); |
| if (!src_tmp) { |
| return false; |
| } |
| result = SDL_StretchSurface(src_tmp, srcrect, dst, dstrect, scaleMode); |
| SDL_DestroySurface(src_tmp); |
| return result; |
| } |
| |
| if (SDL_ISPIXELFORMAT_FOURCC(src->format)) { |
| // Slow! |
| if (!dstrect) { |
| full_dst.x = 0; |
| full_dst.y = 0; |
| full_dst.w = dst->w; |
| full_dst.h = dst->h; |
| dstrect = &full_dst; |
| } |
| |
| SDL_Surface *src_tmp = SDL_ConvertSurface(src, SDL_PIXELFORMAT_XRGB8888); |
| SDL_Surface *dst_tmp = SDL_CreateSurface(dstrect->w, dstrect->h, SDL_PIXELFORMAT_XRGB8888); |
| if (src_tmp && dst_tmp) { |
| result = SDL_StretchSurface(src_tmp, srcrect, dst_tmp, NULL, scaleMode); |
| if (result) { |
| result = SDL_ConvertPixelsAndColorspace(dstrect->w, dstrect->h, |
| dst_tmp->format, SDL_COLORSPACE_SRGB, 0, |
| dst_tmp->pixels, dst_tmp->pitch, |
| dst->format, dst->colorspace, SDL_GetSurfaceProperties(dst), |
| (Uint8 *)dst->pixels + dstrect->y * dst->pitch + dstrect->x * SDL_BYTESPERPIXEL(dst->format), dst->pitch); |
| } |
| } else { |
| result = false; |
| } |
| SDL_DestroySurface(src_tmp); |
| SDL_DestroySurface(dst_tmp); |
| return result; |
| } |
| |
| switch (scaleMode) { |
| case SDL_SCALEMODE_NEAREST: |
| break; |
| case SDL_SCALEMODE_LINEAR: |
| break; |
| case SDL_SCALEMODE_PIXELART: |
| scaleMode = SDL_SCALEMODE_NEAREST; |
| break; |
| default: |
| return SDL_InvalidParamError("scaleMode"); |
| } |
| |
| if (scaleMode == SDL_SCALEMODE_LINEAR) { |
| if (SDL_BYTESPERPIXEL(src->format) != 4 || src->format == SDL_PIXELFORMAT_ARGB2101010) { |
| return SDL_SetError("Wrong format"); |
| } |
| } |
| |
| // 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; |
| } |
| |
| if (dstrect->w <= 0 || dstrect->h <= 0) { |
| return true; |
| } |
| |
| if (srcrect->w > SDL_MAX_UINT16 || srcrect->h > SDL_MAX_UINT16 || |
| dstrect->w > SDL_MAX_UINT16 || dstrect->h > SDL_MAX_UINT16) { |
| return SDL_SetError("Size too large for scaling"); |
| } |
| |
| // Lock the destination if it's in hardware |
| dst_locked = 0; |
| if (SDL_MUSTLOCK(dst)) { |
| if (!SDL_LockSurface(dst)) { |
| 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)) { |
| if (dst_locked) { |
| SDL_UnlockSurface(dst); |
| } |
| return SDL_SetError("Unable to lock source surface"); |
| } |
| src_locked = 1; |
| } |
| |
| if (scaleMode == SDL_SCALEMODE_NEAREST) { |
| result = SDL_StretchSurfaceUncheckedNearest(src, srcrect, dst, dstrect); |
| } else { |
| result = SDL_StretchSurfaceUncheckedLinear(src, srcrect, dst, dstrect); |
| } |
| |
| // We need to unlock the surfaces if they're locked |
| if (dst_locked) { |
| SDL_UnlockSurface(dst); |
| } |
| if (src_locked) { |
| SDL_UnlockSurface(src); |
| } |
| |
| return result; |
| } |
| |
| /* bilinear interpolation precision must be < 8 |
| Because with SSE: add-multiply: _mm_madd_epi16 works with signed int |
| so pixels 0xb1...... are negatives and false the result |
| same in NEON probably */ |
| #define PRECISION 7 |
| |
| #define FIXED_POINT(i) ((Uint32)(i) << 16) |
| #define SRC_INDEX(fp) ((Uint32)(fp) >> 16) |
| #define INTEGER(fp) ((Uint32)(fp) >> PRECISION) |
| #define FRAC(fp) ((Uint32)((fp) >> (16 - PRECISION)) & ((1 << PRECISION) - 1)) |
| #define FRAC_ZERO 0 |
| #define FRAC_ONE (1 << PRECISION) |
| #define FP_ONE FIXED_POINT(1) |
| |
| #define BILINEAR___START \ |
| int i; \ |
| Sint64 fp_sum_h; \ |
| int fp_step_h, left_pad_h, right_pad_h; \ |
| Sint64 fp_sum_w; \ |
| int fp_step_w, left_pad_w, right_pad_w; \ |
| Sint64 fp_sum_w_init; \ |
| int left_pad_w_init, right_pad_w_init, dst_gap, middle_init; \ |
| get_scaler_datas(src_h, dst_h, &fp_sum_h, &fp_step_h, &left_pad_h, &right_pad_h); \ |
| get_scaler_datas(src_w, dst_w, &fp_sum_w, &fp_step_w, &left_pad_w, &right_pad_w); \ |
| fp_sum_w_init = fp_sum_w + left_pad_w * fp_step_w; \ |
| left_pad_w_init = left_pad_w; \ |
| right_pad_w_init = right_pad_w; \ |
| dst_gap = dst_pitch - 4 * dst_w; \ |
| middle_init = dst_w - left_pad_w - right_pad_w; |
| |
| #define BILINEAR___HEIGHT \ |
| int index_h, frac_h0, frac_h1, middle; \ |
| const Uint32 *src_h0, *src_h1; \ |
| int no_padding; \ |
| Uint64 incr_h0, incr_h1; \ |
| \ |
| no_padding = !(i < left_pad_h || i > dst_h - 1 - right_pad_h); \ |
| index_h = SRC_INDEX(fp_sum_h); \ |
| frac_h0 = FRAC(fp_sum_h); \ |
| \ |
| index_h = no_padding ? index_h : (i < left_pad_h ? 0 : src_h - 1); \ |
| frac_h0 = no_padding ? frac_h0 : 0; \ |
| incr_h1 = no_padding ? src_pitch : 0; \ |
| incr_h0 = (Uint64)index_h * src_pitch; \ |
| \ |
| src_h0 = (const Uint32 *)((const Uint8 *)src + incr_h0); \ |
| src_h1 = (const Uint32 *)((const Uint8 *)src_h0 + incr_h1); \ |
| \ |
| fp_sum_h += fp_step_h; \ |
| \ |
| frac_h1 = FRAC_ONE - frac_h0; \ |
| fp_sum_w = fp_sum_w_init; \ |
| right_pad_w = right_pad_w_init; \ |
| left_pad_w = left_pad_w_init; \ |
| middle = middle_init; |
| |
| #ifdef __clang__ |
| // Remove inlining of this function |
| // Compiler crash with clang 9.0.8 / android-ndk-r21d |
| // Compiler crash with clang 11.0.3 / Xcode |
| // OK with clang 11.0.5 / android-ndk-22 |
| // OK with clang 12.0.0 / Xcode |
| __attribute__((noinline)) |
| #endif |
| static void get_scaler_datas(int src_nb, int dst_nb, Sint64 *fp_start, int *fp_step, int *left_pad, int *right_pad) |
| { |
| |
| int step = FIXED_POINT(src_nb) / (dst_nb); // source step in fixed point |
| int x0 = FP_ONE / 2; // dst first pixel center at 0.5 in fixed point |
| Sint64 fp_sum; |
| int i; |
| #if 0 |
| // scale to source coordinates |
| x0 *= src_nb; |
| x0 /= dst_nb; // x0 == step / 2 |
| #else |
| // Use this code for perfect match with pixman |
| Sint64 tmp[2]; |
| tmp[0] = (Sint64)step * (x0 >> 16); |
| tmp[1] = (Sint64)step * (x0 & 0xFFFF); |
| x0 = (int)(tmp[0] + ((tmp[1] + 0x8000) >> 16)); // x0 == (step + 1) / 2 |
| #endif |
| // -= 0.5, get back the pixel origin, in source coordinates |
| x0 -= FP_ONE / 2; |
| |
| *fp_start = x0; |
| *fp_step = step; |
| *left_pad = 0; |
| *right_pad = 0; |
| |
| fp_sum = x0; |
| for (i = 0; i < dst_nb; i++) { |
| if (fp_sum < 0) { |
| *left_pad += 1; |
| } else { |
| int index = SRC_INDEX(fp_sum); |
| if (index > src_nb - 2) { |
| *right_pad += 1; |
| } |
| } |
| fp_sum += step; |
| } |
| // SDL_Log("%d -> %d x0=%d step=%d left_pad=%d right_pad=%d", src_nb, dst_nb, *fp_start, *fp_step, *left_pad, *right_pad); |
| } |
| |
| typedef struct color_t |
| { |
| Uint8 a; |
| Uint8 b; |
| Uint8 c; |
| Uint8 d; |
| } color_t; |
| |
| #if 0 |
| static void printf_64(const char *str, void *var) |
| { |
| uint8_t *val = (uint8_t *)var; |
| printf(" * %s: %02x %02x %02x %02x _ %02x %02x %02x %02x\n", |
| str, val[0], val[1], val[2], val[3], val[4], val[5], val[6], val[7]); |
| } |
| #endif |
| |
| /* Interpolated == x0 + frac * (x1 - x0) == x0 * (1 - frac) + x1 * frac */ |
| |
| static SDL_INLINE void INTERPOL(const Uint32 *src_x0, const Uint32 *src_x1, int frac0, int frac1, Uint32 *dst) |
| { |
| const color_t *c0 = (const color_t *)src_x0; |
| const color_t *c1 = (const color_t *)src_x1; |
| color_t *cx = (color_t *)dst; |
| #if 0 |
| cx->a = c0->a + INTEGER(frac0 * (c1->a - c0->a)); |
| cx->b = c0->b + INTEGER(frac0 * (c1->b - c0->b)); |
| cx->c = c0->c + INTEGER(frac0 * (c1->c - c0->c)); |
| cx->d = c0->d + INTEGER(frac0 * (c1->d - c0->d)); |
| #else |
| cx->a = (Uint8)INTEGER(frac1 * c0->a + frac0 * c1->a); |
| cx->b = (Uint8)INTEGER(frac1 * c0->b + frac0 * c1->b); |
| cx->c = (Uint8)INTEGER(frac1 * c0->c + frac0 * c1->c); |
| cx->d = (Uint8)INTEGER(frac1 * c0->d + frac0 * c1->d); |
| #endif |
| } |
| |
| static SDL_INLINE void INTERPOL_BILINEAR(const Uint32 *s0, const Uint32 *s1, int frac_w0, int frac_h0, int frac_h1, Uint32 *dst) |
| { |
| Uint32 tmp[2]; |
| unsigned int frac_w1 = FRAC_ONE - frac_w0; |
| |
| // Vertical first, store to 'tmp' |
| INTERPOL(s0, s1, frac_h0, frac_h1, tmp); |
| INTERPOL(s0 + 1, s1 + 1, frac_h0, frac_h1, tmp + 1); |
| |
| // Horizontal, store to 'dst' |
| INTERPOL(tmp, tmp + 1, frac_w0, frac_w1, dst); |
| } |
| |
| static bool scale_mat(const Uint32 *src, int src_w, int src_h, int src_pitch, Uint32 *dst, int dst_w, int dst_h, int dst_pitch) |
| { |
| BILINEAR___START |
| |
| for (i = 0; i < dst_h; i++) { |
| |
| BILINEAR___HEIGHT |
| |
| while (left_pad_w--) { |
| INTERPOL_BILINEAR(src_h0, src_h1, FRAC_ZERO, frac_h0, frac_h1, dst); |
| dst += 1; |
| } |
| |
| while (middle--) { |
| const Uint32 *s_00_01; |
| const Uint32 *s_10_11; |
| int index_w = 4 * SRC_INDEX(fp_sum_w); |
| int frac_w = FRAC(fp_sum_w); |
| fp_sum_w += fp_step_w; |
| |
| /* |
| x00 ... x0_ ..... x01 |
| . . . |
| . x . |
| . . . |
| . . . |
| x10 ... x1_ ..... x11 |
| */ |
| s_00_01 = (const Uint32 *)((const Uint8 *)src_h0 + index_w); |
| s_10_11 = (const Uint32 *)((const Uint8 *)src_h1 + index_w); |
| |
| INTERPOL_BILINEAR(s_00_01, s_10_11, frac_w, frac_h0, frac_h1, dst); |
| |
| dst += 1; |
| } |
| |
| while (right_pad_w--) { |
| int index_w = 4 * (src_w - 2); |
| const Uint32 *s_00_01 = (const Uint32 *)((const Uint8 *)src_h0 + index_w); |
| const Uint32 *s_10_11 = (const Uint32 *)((const Uint8 *)src_h1 + index_w); |
| INTERPOL_BILINEAR(s_00_01, s_10_11, FRAC_ONE, frac_h0, frac_h1, dst); |
| dst += 1; |
| } |
| dst = (Uint32 *)((Uint8 *)dst + dst_gap); |
| } |
| return true; |
| } |
| |
| #ifdef SDL_NEON_INTRINSICS |
| #define CAST_uint8x8_t (uint8x8_t) |
| #define CAST_uint32x2_t (uint32x2_t) |
| #endif |
| |
| #if defined(_MSC_VER) |
| #ifdef SDL_NEON_INTRINSICS |
| #undef CAST_uint8x8_t |
| #undef CAST_uint32x2_t |
| #define CAST_uint8x8_t |
| #define CAST_uint32x2_t |
| #endif |
| #endif |
| |
| #ifdef SDL_SSE2_INTRINSICS |
| |
| #if 0 |
| static void SDL_TARGETING("sse2") printf_128(const char *str, __m128i var) |
| { |
| uint16_t *val = (uint16_t *)&var; |
| printf(" * %s: %04x %04x %04x %04x _ %04x %04x %04x %04x\n", |
| str, val[0], val[1], val[2], val[3], val[4], val[5], val[6], val[7]); |
| } |
| #endif |
| |
| static SDL_INLINE int hasSSE2(void) |
| { |
| static int val = -1; |
| if (val != -1) { |
| return val; |
| } |
| val = SDL_HasSSE2(); |
| return val; |
| } |
| |
| static SDL_INLINE void SDL_TARGETING("sse2") INTERPOL_BILINEAR_SSE(const Uint32 *s0, const Uint32 *s1, int frac_w, __m128i v_frac_h0, __m128i v_frac_h1, Uint32 *dst, __m128i zero) |
| { |
| __m128i x_00_01, x_10_11; /* Pixels in 4*uint8 in row */ |
| __m128i v_frac_w0, k0, l0, d0, e0; |
| |
| int f, f2; |
| f = frac_w; |
| f2 = FRAC_ONE - frac_w; |
| v_frac_w0 = _mm_set_epi16((short)f, (short)f2, (short)f, (short)f2, (short)f, (short)f2, (short)f, (short)f2); |
| |
| x_00_01 = _mm_loadl_epi64((const __m128i *)s0); // Load x00 and x01 |
| x_10_11 = _mm_loadl_epi64((const __m128i *)s1); |
| |
| /* Interpolated == x0 + frac * (x1 - x0) == x0 * (1 - frac) + x1 * frac */ |
| |
| // Interpolation vertical |
| k0 = _mm_mullo_epi16(_mm_unpacklo_epi8(x_00_01, zero), v_frac_h1); |
| l0 = _mm_mullo_epi16(_mm_unpacklo_epi8(x_10_11, zero), v_frac_h0); |
| k0 = _mm_add_epi16(k0, l0); |
| |
| // For perfect match, clear the factionnal part eventually. |
| /* |
| k0 = _mm_srli_epi16(k0, PRECISION); |
| k0 = _mm_slli_epi16(k0, PRECISION); |
| */ |
| |
| // Interpolation horizontal |
| l0 = _mm_unpacklo_epi64(/* unused */ l0, k0); |
| k0 = _mm_madd_epi16(_mm_unpackhi_epi16(l0, k0), v_frac_w0); |
| |
| // Store 1 pixel |
| d0 = _mm_srli_epi32(k0, PRECISION * 2); |
| e0 = _mm_packs_epi32(d0, d0); |
| e0 = _mm_packus_epi16(e0, e0); |
| *dst = _mm_cvtsi128_si32(e0); |
| } |
| |
| static bool SDL_TARGETING("sse2") scale_mat_SSE(const Uint32 *src, int src_w, int src_h, int src_pitch, Uint32 *dst, int dst_w, int dst_h, int dst_pitch) |
| { |
| BILINEAR___START |
| |
| for (i = 0; i < dst_h; i++) { |
| int nb_block2; |
| __m128i v_frac_h0; |
| __m128i v_frac_h1; |
| __m128i zero; |
| |
| BILINEAR___HEIGHT |
| |
| nb_block2 = middle / 2; |
| |
| v_frac_h0 = _mm_set_epi16((short)frac_h0, (short)frac_h0, (short)frac_h0, (short)frac_h0, (short)frac_h0, (short)frac_h0, (short)frac_h0, (short)frac_h0); |
| v_frac_h1 = _mm_set_epi16((short)frac_h1, (short)frac_h1, (short)frac_h1, (short)frac_h1, (short)frac_h1, (short)frac_h1, (short)frac_h1, (short)frac_h1); |
| zero = _mm_setzero_si128(); |
| |
| while (left_pad_w--) { |
| INTERPOL_BILINEAR_SSE(src_h0, src_h1, FRAC_ZERO, v_frac_h0, v_frac_h1, dst, zero); |
| dst += 1; |
| } |
| |
| while (nb_block2--) { |
| int index_w_0, frac_w_0; |
| int index_w_1, frac_w_1; |
| |
| const Uint32 *s_00_01, *s_02_03, *s_10_11, *s_12_13; |
| |
| __m128i x_00_01, x_10_11, x_02_03, x_12_13; /* Pixels in 4*uint8 in row */ |
| __m128i v_frac_w0, k0, l0, d0, e0; |
| __m128i v_frac_w1, k1, l1, d1, e1; |
| |
| int f, f2; |
| index_w_0 = 4 * SRC_INDEX(fp_sum_w); |
| frac_w_0 = FRAC(fp_sum_w); |
| fp_sum_w += fp_step_w; |
| index_w_1 = 4 * SRC_INDEX(fp_sum_w); |
| frac_w_1 = FRAC(fp_sum_w); |
| fp_sum_w += fp_step_w; |
| /* |
| x00............ x01 x02...........x03 |
| . . . . . . |
| j0 f0 j1 j2 f1 j3 |
| . . . . . . |
| . . . . . . |
| . . . . . . |
| x10............ x11 x12...........x13 |
| */ |
| s_00_01 = (const Uint32 *)((const Uint8 *)src_h0 + index_w_0); |
| s_02_03 = (const Uint32 *)((const Uint8 *)src_h0 + index_w_1); |
| s_10_11 = (const Uint32 *)((const Uint8 *)src_h1 + index_w_0); |
| s_12_13 = (const Uint32 *)((const Uint8 *)src_h1 + index_w_1); |
| |
| f = frac_w_0; |
| f2 = FRAC_ONE - frac_w_0; |
| v_frac_w0 = _mm_set_epi16((short)f, (short)f2, (short)f, (short)f2, (short)f, (short)f2, (short)f, (short)f2); |
| |
| f = frac_w_1; |
| f2 = FRAC_ONE - frac_w_1; |
| v_frac_w1 = _mm_set_epi16((short)f, (short)f2, (short)f, (short)f2, (short)f, (short)f2, (short)f, (short)f2); |
| |
| x_00_01 = _mm_loadl_epi64((const __m128i *)s_00_01); // Load x00 and x01 |
| x_02_03 = _mm_loadl_epi64((const __m128i *)s_02_03); |
| x_10_11 = _mm_loadl_epi64((const __m128i *)s_10_11); |
| x_12_13 = _mm_loadl_epi64((const __m128i *)s_12_13); |
| |
| // Interpolation vertical |
| k0 = _mm_mullo_epi16(_mm_unpacklo_epi8(x_00_01, zero), v_frac_h1); |
| l0 = _mm_mullo_epi16(_mm_unpacklo_epi8(x_10_11, zero), v_frac_h0); |
| k0 = _mm_add_epi16(k0, l0); |
| k1 = _mm_mullo_epi16(_mm_unpacklo_epi8(x_02_03, zero), v_frac_h1); |
| l1 = _mm_mullo_epi16(_mm_unpacklo_epi8(x_12_13, zero), v_frac_h0); |
| k1 = _mm_add_epi16(k1, l1); |
| |
| // Interpolation horizontal |
| l0 = _mm_unpacklo_epi64(/* unused */ l0, k0); |
| k0 = _mm_madd_epi16(_mm_unpackhi_epi16(l0, k0), v_frac_w0); |
| l1 = _mm_unpacklo_epi64(/* unused */ l1, k1); |
| k1 = _mm_madd_epi16(_mm_unpackhi_epi16(l1, k1), v_frac_w1); |
| |
| // Store 1 pixel |
| d0 = _mm_srli_epi32(k0, PRECISION * 2); |
| e0 = _mm_packs_epi32(d0, d0); |
| e0 = _mm_packus_epi16(e0, e0); |
| *dst++ = _mm_cvtsi128_si32(e0); |
| |
| // Store 1 pixel |
| d1 = _mm_srli_epi32(k1, PRECISION * 2); |
| e1 = _mm_packs_epi32(d1, d1); |
| e1 = _mm_packus_epi16(e1, e1); |
| *dst++ = _mm_cvtsi128_si32(e1); |
| } |
| |
| // Last point |
| if (middle & 0x1) { |
| const Uint32 *s_00_01; |
| const Uint32 *s_10_11; |
| int index_w = 4 * SRC_INDEX(fp_sum_w); |
| int frac_w = FRAC(fp_sum_w); |
| fp_sum_w += fp_step_w; |
| s_00_01 = (const Uint32 *)((const Uint8 *)src_h0 + index_w); |
| s_10_11 = (const Uint32 *)((const Uint8 *)src_h1 + index_w); |
| INTERPOL_BILINEAR_SSE(s_00_01, s_10_11, frac_w, v_frac_h0, v_frac_h1, dst, zero); |
| dst += 1; |
| } |
| |
| while (right_pad_w--) { |
| int index_w = 4 * (src_w - 2); |
| const Uint32 *s_00_01 = (const Uint32 *)((const Uint8 *)src_h0 + index_w); |
| const Uint32 *s_10_11 = (const Uint32 *)((const Uint8 *)src_h1 + index_w); |
| INTERPOL_BILINEAR_SSE(s_00_01, s_10_11, FRAC_ONE, v_frac_h0, v_frac_h1, dst, zero); |
| dst += 1; |
| } |
| dst = (Uint32 *)((Uint8 *)dst + dst_gap); |
| } |
| return true; |
| } |
| #endif |
| |
| #ifdef SDL_NEON_INTRINSICS |
| |
| static SDL_INLINE int hasNEON(void) |
| { |
| static int val = -1; |
| if (val != -1) { |
| return val; |
| } |
| val = SDL_HasNEON(); |
| return val; |
| } |
| |
| static SDL_INLINE void INTERPOL_BILINEAR_NEON(const Uint32 *s0, const Uint32 *s1, int frac_w, uint8x8_t v_frac_h0, uint8x8_t v_frac_h1, Uint32 *dst) |
| { |
| uint8x8_t x_00_01, x_10_11; /* Pixels in 4*uint8 in row */ |
| uint16x8_t k0; |
| uint32x4_t l0; |
| uint16x8_t d0; |
| uint8x8_t e0; |
| |
| x_00_01 = CAST_uint8x8_t vld1_u32(s0); // Load 2 pixels |
| x_10_11 = CAST_uint8x8_t vld1_u32(s1); |
| |
| /* Interpolated == x0 + frac * (x1 - x0) == x0 * (1 - frac) + x1 * frac */ |
| k0 = vmull_u8(x_00_01, v_frac_h1); /* k0 := x0 * (1 - frac) */ |
| k0 = vmlal_u8(k0, x_10_11, v_frac_h0); /* k0 += x1 * frac */ |
| |
| // k0 now contains 2 interpolated pixels { j0, j1 } |
| l0 = vshll_n_u16(vget_low_u16(k0), PRECISION); |
| l0 = vmlsl_n_u16(l0, vget_low_u16(k0), frac_w); |
| l0 = vmlal_n_u16(l0, vget_high_u16(k0), frac_w); |
| |
| // Shift and narrow |
| d0 = vcombine_u16( |
| /* uint16x4_t */ vshrn_n_u32(l0, 2 * PRECISION), |
| /* uint16x4_t */ vshrn_n_u32(l0, 2 * PRECISION)); |
| |
| // Narrow again |
| e0 = vmovn_u16(d0); |
| |
| // Store 1 pixel |
| *dst = vget_lane_u32(CAST_uint32x2_t e0, 0); |
| } |
| |
| static bool scale_mat_NEON(const Uint32 *src, int src_w, int src_h, int src_pitch, Uint32 *dst, int dst_w, int dst_h, int dst_pitch) |
| { |
| BILINEAR___START |
| |
| for (i = 0; i < dst_h; i++) { |
| int nb_block4; |
| uint8x8_t v_frac_h0, v_frac_h1; |
| |
| BILINEAR___HEIGHT |
| |
| nb_block4 = middle / 4; |
| |
| v_frac_h0 = vmov_n_u8(frac_h0); |
| v_frac_h1 = vmov_n_u8(frac_h1); |
| |
| while (left_pad_w--) { |
| INTERPOL_BILINEAR_NEON(src_h0, src_h1, FRAC_ZERO, v_frac_h0, v_frac_h1, dst); |
| dst += 1; |
| } |
| |
| while (nb_block4--) { |
| int index_w_0, frac_w_0; |
| int index_w_1, frac_w_1; |
| int index_w_2, frac_w_2; |
| int index_w_3, frac_w_3; |
| |
| const Uint32 *s_00_01, *s_02_03, *s_04_05, *s_06_07; |
| const Uint32 *s_10_11, *s_12_13, *s_14_15, *s_16_17; |
| |
| uint8x8_t x_00_01, x_10_11, x_02_03, x_12_13; /* Pixels in 4*uint8 in row */ |
| uint8x8_t x_04_05, x_14_15, x_06_07, x_16_17; |
| |
| uint16x8_t k0, k1, k2, k3; |
| uint32x4_t l0, l1, l2, l3; |
| uint16x8_t d0, d1; |
| uint8x8_t e0, e1; |
| uint32x4_t f0; |
| |
| index_w_0 = 4 * SRC_INDEX(fp_sum_w); |
| frac_w_0 = FRAC(fp_sum_w); |
| fp_sum_w += fp_step_w; |
| index_w_1 = 4 * SRC_INDEX(fp_sum_w); |
| frac_w_1 = FRAC(fp_sum_w); |
| fp_sum_w += fp_step_w; |
| index_w_2 = 4 * SRC_INDEX(fp_sum_w); |
| frac_w_2 = FRAC(fp_sum_w); |
| fp_sum_w += fp_step_w; |
| index_w_3 = 4 * SRC_INDEX(fp_sum_w); |
| frac_w_3 = FRAC(fp_sum_w); |
| fp_sum_w += fp_step_w; |
| |
| s_00_01 = (const Uint32 *)((const Uint8 *)src_h0 + index_w_0); |
| s_02_03 = (const Uint32 *)((const Uint8 *)src_h0 + index_w_1); |
| s_04_05 = (const Uint32 *)((const Uint8 *)src_h0 + index_w_2); |
| s_06_07 = (const Uint32 *)((const Uint8 *)src_h0 + index_w_3); |
| s_10_11 = (const Uint32 *)((const Uint8 *)src_h1 + index_w_0); |
| s_12_13 = (const Uint32 *)((const Uint8 *)src_h1 + index_w_1); |
| s_14_15 = (const Uint32 *)((const Uint8 *)src_h1 + index_w_2); |
| s_16_17 = (const Uint32 *)((const Uint8 *)src_h1 + index_w_3); |
| |
| // Interpolation vertical |
| x_00_01 = CAST_uint8x8_t vld1_u32(s_00_01); // Load 2 pixels |
| x_02_03 = CAST_uint8x8_t vld1_u32(s_02_03); |
| x_04_05 = CAST_uint8x8_t vld1_u32(s_04_05); |
| x_06_07 = CAST_uint8x8_t vld1_u32(s_06_07); |
| x_10_11 = CAST_uint8x8_t vld1_u32(s_10_11); |
| x_12_13 = CAST_uint8x8_t vld1_u32(s_12_13); |
| x_14_15 = CAST_uint8x8_t vld1_u32(s_14_15); |
| x_16_17 = CAST_uint8x8_t vld1_u32(s_16_17); |
| |
| /* Interpolated == x0 + frac * (x1 - x0) == x0 * (1 - frac) + x1 * frac */ |
| k0 = vmull_u8(x_00_01, v_frac_h1); /* k0 := x0 * (1 - frac) */ |
| k0 = vmlal_u8(k0, x_10_11, v_frac_h0); /* k0 += x1 * frac */ |
| |
| k1 = vmull_u8(x_02_03, v_frac_h1); |
| k1 = vmlal_u8(k1, x_12_13, v_frac_h0); |
| |
| k2 = vmull_u8(x_04_05, v_frac_h1); |
| k2 = vmlal_u8(k2, x_14_15, v_frac_h0); |
| |
| k3 = vmull_u8(x_06_07, v_frac_h1); |
| k3 = vmlal_u8(k3, x_16_17, v_frac_h0); |
| |
| // k0 now contains 2 interpolated pixels { j0, j1 } |
| // k1 now contains 2 interpolated pixels { j2, j3 } |
| // k2 now contains 2 interpolated pixels { j4, j5 } |
| // k3 now contains 2 interpolated pixels { j6, j7 } |
| |
| l0 = vshll_n_u16(vget_low_u16(k0), PRECISION); |
| l0 = vmlsl_n_u16(l0, vget_low_u16(k0), frac_w_0); |
| l0 = vmlal_n_u16(l0, vget_high_u16(k0), frac_w_0); |
| |
| l1 = vshll_n_u16(vget_low_u16(k1), PRECISION); |
| l1 = vmlsl_n_u16(l1, vget_low_u16(k1), frac_w_1); |
| l1 = vmlal_n_u16(l1, vget_high_u16(k1), frac_w_1); |
| |
| l2 = vshll_n_u16(vget_low_u16(k2), PRECISION); |
| l2 = vmlsl_n_u16(l2, vget_low_u16(k2), frac_w_2); |
| l2 = vmlal_n_u16(l2, vget_high_u16(k2), frac_w_2); |
| |
| l3 = vshll_n_u16(vget_low_u16(k3), PRECISION); |
| l3 = vmlsl_n_u16(l3, vget_low_u16(k3), frac_w_3); |
| l3 = vmlal_n_u16(l3, vget_high_u16(k3), frac_w_3); |
| |
| // shift and narrow |
| d0 = vcombine_u16( |
| /* uint16x4_t */ vshrn_n_u32(l0, 2 * PRECISION), |
| /* uint16x4_t */ vshrn_n_u32(l1, 2 * PRECISION)); |
| // narrow again |
| e0 = vmovn_u16(d0); |
| |
| // Shift and narrow |
| d1 = vcombine_u16( |
| /* uint16x4_t */ vshrn_n_u32(l2, 2 * PRECISION), |
| /* uint16x4_t */ vshrn_n_u32(l3, 2 * PRECISION)); |
| // Narrow again |
| e1 = vmovn_u16(d1); |
| |
| f0 = vcombine_u32(CAST_uint32x2_t e0, CAST_uint32x2_t e1); |
| // Store 4 pixels |
| vst1q_u32(dst, f0); |
| |
| dst += 4; |
| } |
| |
| if (middle & 0x2) { |
| int index_w_0, frac_w_0; |
| int index_w_1, frac_w_1; |
| const Uint32 *s_00_01, *s_02_03; |
| const Uint32 *s_10_11, *s_12_13; |
| uint8x8_t x_00_01, x_10_11, x_02_03, x_12_13; /* Pixels in 4*uint8 in row */ |
| uint16x8_t k0, k1; |
| uint32x4_t l0, l1; |
| uint16x8_t d0; |
| uint8x8_t e0; |
| |
| index_w_0 = 4 * SRC_INDEX(fp_sum_w); |
| frac_w_0 = FRAC(fp_sum_w); |
| fp_sum_w += fp_step_w; |
| index_w_1 = 4 * SRC_INDEX(fp_sum_w); |
| frac_w_1 = FRAC(fp_sum_w); |
| fp_sum_w += fp_step_w; |
| /* |
| x00............ x01 x02...........x03 |
| . . . . . . |
| j0 dest0 j1 j2 dest1 j3 |
| . . . . . . |
| . . . . . . |
| . . . . . . |
| x10............ x11 x12...........x13 |
| */ |
| s_00_01 = (const Uint32 *)((const Uint8 *)src_h0 + index_w_0); |
| s_02_03 = (const Uint32 *)((const Uint8 *)src_h0 + index_w_1); |
| s_10_11 = (const Uint32 *)((const Uint8 *)src_h1 + index_w_0); |
| s_12_13 = (const Uint32 *)((const Uint8 *)src_h1 + index_w_1); |
| |
| // Interpolation vertical |
| x_00_01 = CAST_uint8x8_t vld1_u32(s_00_01); // Load 2 pixels |
| x_02_03 = CAST_uint8x8_t vld1_u32(s_02_03); |
| x_10_11 = CAST_uint8x8_t vld1_u32(s_10_11); |
| x_12_13 = CAST_uint8x8_t vld1_u32(s_12_13); |
| |
| /* Interpolated == x0 + frac * (x1 - x0) == x0 * (1 - frac) + x1 * frac */ |
| k0 = vmull_u8(x_00_01, v_frac_h1); /* k0 := x0 * (1 - frac) */ |
| k0 = vmlal_u8(k0, x_10_11, v_frac_h0); /* k0 += x1 * frac */ |
| |
| k1 = vmull_u8(x_02_03, v_frac_h1); |
| k1 = vmlal_u8(k1, x_12_13, v_frac_h0); |
| |
| // k0 now contains 2 interpolated pixels { j0, j1 } |
| // k1 now contains 2 interpolated pixels { j2, j3 } |
| |
| l0 = vshll_n_u16(vget_low_u16(k0), PRECISION); |
| l0 = vmlsl_n_u16(l0, vget_low_u16(k0), frac_w_0); |
| l0 = vmlal_n_u16(l0, vget_high_u16(k0), frac_w_0); |
| |
| l1 = vshll_n_u16(vget_low_u16(k1), PRECISION); |
| l1 = vmlsl_n_u16(l1, vget_low_u16(k1), frac_w_1); |
| l1 = vmlal_n_u16(l1, vget_high_u16(k1), frac_w_1); |
| |
| // Shift and narrow |
| |
| d0 = vcombine_u16( |
| /* uint16x4_t */ vshrn_n_u32(l0, 2 * PRECISION), |
| /* uint16x4_t */ vshrn_n_u32(l1, 2 * PRECISION)); |
| |
| // Narrow again |
| e0 = vmovn_u16(d0); |
| |
| // Store 2 pixels |
| vst1_u32(dst, CAST_uint32x2_t e0); |
| dst += 2; |
| } |
| |
| // Last point |
| if (middle & 0x1) { |
| int index_w = 4 * SRC_INDEX(fp_sum_w); |
| int frac_w = FRAC(fp_sum_w); |
| const Uint32 *s_00_01 = (const Uint32 *)((const Uint8 *)src_h0 + index_w); |
| const Uint32 *s_10_11 = (const Uint32 *)((const Uint8 *)src_h1 + index_w); |
| INTERPOL_BILINEAR_NEON(s_00_01, s_10_11, frac_w, v_frac_h0, v_frac_h1, dst); |
| dst += 1; |
| } |
| |
| while (right_pad_w--) { |
| int index_w = 4 * (src_w - 2); |
| const Uint32 *s_00_01 = (const Uint32 *)((const Uint8 *)src_h0 + index_w); |
| const Uint32 *s_10_11 = (const Uint32 *)((const Uint8 *)src_h1 + index_w); |
| INTERPOL_BILINEAR_NEON(s_00_01, s_10_11, FRAC_ONE, v_frac_h0, v_frac_h1, dst); |
| dst += 1; |
| } |
| |
| dst = (Uint32 *)((Uint8 *)dst + dst_gap); |
| } |
| return true; |
| } |
| #endif |
| |
| bool SDL_StretchSurfaceUncheckedLinear(SDL_Surface *s, const SDL_Rect *srcrect, SDL_Surface *d, const SDL_Rect *dstrect) |
| { |
| bool result = false; |
| int src_w = srcrect->w; |
| int src_h = srcrect->h; |
| int dst_w = dstrect->w; |
| int dst_h = dstrect->h; |
| int src_pitch = s->pitch; |
| int dst_pitch = d->pitch; |
| Uint32 *src = (Uint32 *)((Uint8 *)s->pixels + srcrect->x * 4 + srcrect->y * src_pitch); |
| Uint32 *dst = (Uint32 *)((Uint8 *)d->pixels + dstrect->x * 4 + dstrect->y * dst_pitch); |
| |
| #ifdef SDL_NEON_INTRINSICS |
| if (!result && hasNEON()) { |
| result = scale_mat_NEON(src, src_w, src_h, src_pitch, dst, dst_w, dst_h, dst_pitch); |
| } |
| #endif |
| |
| #ifdef SDL_SSE2_INTRINSICS |
| if (!result && hasSSE2()) { |
| result = scale_mat_SSE(src, src_w, src_h, src_pitch, dst, dst_w, dst_h, dst_pitch); |
| } |
| #endif |
| |
| if (!result) { |
| result = scale_mat(src, src_w, src_h, src_pitch, dst, dst_w, dst_h, dst_pitch); |
| } |
| |
| return result; |
| } |
| |
| #define SDL_SCALE_NEAREST__START \ |
| int i; \ |
| Uint64 posy, incy; \ |
| Uint64 posx, incx; \ |
| Uint64 srcy, srcx; \ |
| int dst_gap, n; \ |
| const Uint32 *src_h0; \ |
| incy = ((Uint64)src_h << 16) / dst_h; \ |
| incx = ((Uint64)src_w << 16) / dst_w; \ |
| dst_gap = dst_pitch - bpp * dst_w; \ |
| posy = incy / 2; |
| |
| #define SDL_SCALE_NEAREST__HEIGHT \ |
| srcy = (posy >> 16); \ |
| src_h0 = (const Uint32 *)((const Uint8 *)src_ptr + srcy * src_pitch); \ |
| posy += incy; \ |
| posx = incx / 2; \ |
| n = dst_w; |
| |
| static bool scale_mat_nearest_1(const Uint32 *src_ptr, int src_w, int src_h, int src_pitch, Uint32 *dst, int dst_w, int dst_h, int dst_pitch) |
| { |
| Uint32 bpp = 1; |
| SDL_SCALE_NEAREST__START |
| for (i = 0; i < dst_h; i++) { |
| SDL_SCALE_NEAREST__HEIGHT |
| while (n--) { |
| const Uint8 *src; |
| srcx = bpp * (posx >> 16); |
| posx += incx; |
| src = (const Uint8 *)src_h0 + srcx; |
| *(Uint8 *)dst = *src; |
| dst = (Uint32 *)((Uint8 *)dst + bpp); |
| } |
| dst = (Uint32 *)((Uint8 *)dst + dst_gap); |
| } |
| return true; |
| } |
| |
| static bool scale_mat_nearest_2(const Uint32 *src_ptr, int src_w, int src_h, int src_pitch, Uint32 *dst, int dst_w, int dst_h, int dst_pitch) |
| { |
| Uint32 bpp = 2; |
| SDL_SCALE_NEAREST__START |
| for (i = 0; i < dst_h; i++) { |
| SDL_SCALE_NEAREST__HEIGHT |
| while (n--) { |
| const Uint16 *src; |
| srcx = bpp * (posx >> 16); |
| posx += incx; |
| src = (const Uint16 *)((const Uint8 *)src_h0 + srcx); |
| *(Uint16 *)dst = *src; |
| dst = (Uint32 *)((Uint8 *)dst + bpp); |
| } |
| dst = (Uint32 *)((Uint8 *)dst + dst_gap); |
| } |
| return true; |
| } |
| |
| static bool scale_mat_nearest_3(const Uint32 *src_ptr, int src_w, int src_h, int src_pitch, Uint32 *dst, int dst_w, int dst_h, int dst_pitch) |
| { |
| Uint32 bpp = 3; |
| SDL_SCALE_NEAREST__START |
| for (i = 0; i < dst_h; i++) { |
| SDL_SCALE_NEAREST__HEIGHT |
| while (n--) { |
| const Uint8 *src; |
| srcx = bpp * (posx >> 16); |
| posx += incx; |
| src = (const Uint8 *)src_h0 + srcx; |
| ((Uint8 *)dst)[0] = src[0]; |
| ((Uint8 *)dst)[1] = src[1]; |
| ((Uint8 *)dst)[2] = src[2]; |
| dst = (Uint32 *)((Uint8 *)dst + bpp); |
| } |
| dst = (Uint32 *)((Uint8 *)dst + dst_gap); |
| } |
| return true; |
| } |
| |
| static bool scale_mat_nearest_4(const Uint32 *src_ptr, int src_w, int src_h, int src_pitch, Uint32 *dst, int dst_w, int dst_h, int dst_pitch) |
| { |
| Uint32 bpp = 4; |
| SDL_SCALE_NEAREST__START |
| for (i = 0; i < dst_h; i++) { |
| SDL_SCALE_NEAREST__HEIGHT |
| while (n--) { |
| const Uint32 *src; |
| srcx = bpp * (posx >> 16); |
| posx += incx; |
| src = (const Uint32 *)((const Uint8 *)src_h0 + srcx); |
| *dst = *src; |
| dst = (Uint32 *)((Uint8 *)dst + bpp); |
| } |
| dst = (Uint32 *)((Uint8 *)dst + dst_gap); |
| } |
| return true; |
| } |
| |
| bool SDL_StretchSurfaceUncheckedNearest(SDL_Surface *s, const SDL_Rect *srcrect, SDL_Surface *d, const SDL_Rect *dstrect) |
| { |
| int src_w = srcrect->w; |
| int src_h = srcrect->h; |
| int dst_w = dstrect->w; |
| int dst_h = dstrect->h; |
| int src_pitch = s->pitch; |
| int dst_pitch = d->pitch; |
| int bpp = SDL_BYTESPERPIXEL(d->format); |
| |
| Uint32 *src = (Uint32 *)((Uint8 *)s->pixels + srcrect->x * bpp + srcrect->y * src_pitch); |
| Uint32 *dst = (Uint32 *)((Uint8 *)d->pixels + dstrect->x * bpp + dstrect->y * dst_pitch); |
| |
| if (bpp == 4) { |
| return scale_mat_nearest_4(src, src_w, src_h, src_pitch, dst, dst_w, dst_h, dst_pitch); |
| } else if (bpp == 3) { |
| return scale_mat_nearest_3(src, src_w, src_h, src_pitch, dst, dst_w, dst_h, dst_pitch); |
| } else if (bpp == 2) { |
| return scale_mat_nearest_2(src, src_w, src_h, src_pitch, dst, dst_w, dst_h, dst_pitch); |
| } else { |
| return scale_mat_nearest_1(src, src_w, src_h, src_pitch, dst, dst_w, dst_h, dst_pitch); |
| } |
| } |
