mirror of https://github.com/encounter/SDL.git
Add SDL_SoftStretchLowerLinear() (Bug 5313)
This commit is contained in:
Sylvain Becker
parent
050ee9a410
commit
ae8a270f61
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@ -519,6 +519,17 @@ extern DECLSPEC int SDLCALL SDL_SoftStretch(SDL_Surface * src,
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SDL_Surface * dst,
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const SDL_Rect * dstrect);
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/**
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* \brief Perform a bilinear scaling between two surfaces of the
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* same pixel format, 32BPP.
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*
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*/
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extern DECLSPEC int SDLCALL SDL_SoftStretchLinear(SDL_Surface * src,
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const SDL_Rect * srcrect,
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SDL_Surface * dst,
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const SDL_Rect * dstrect);
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#define SDL_BlitScaled SDL_UpperBlitScaled
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/**
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@ -198,6 +198,7 @@ copy_row3(Uint8 * src, int src_w, Uint8 * dst, int dst_w)
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}
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static int SDL_SoftStretchLowerNearest(SDL_Surface *src, const SDL_Rect *srcrect, SDL_Surface *dst, const SDL_Rect *dstrect);
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static int SDL_SoftStretchLowerLinear(SDL_Surface *src, const SDL_Rect *srcrect, SDL_Surface *dst, const SDL_Rect *dstrect);
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static int SDL_UpperSoftStretch(SDL_Surface * src, const SDL_Rect * srcrect, SDL_Surface * dst, const SDL_Rect * dstrect, SDL_ScaleMode scaleMode);
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/* Perform a stretch blit between two surfaces of the same format.
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@ -210,6 +211,13 @@ SDL_SoftStretch(SDL_Surface *src, const SDL_Rect *srcrect,
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return SDL_UpperSoftStretch(src, srcrect, dst, dstrect, SDL_ScaleModeNearest);
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}
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int
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SDL_SoftStretchLinear(SDL_Surface *src, const SDL_Rect *srcrect,
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SDL_Surface *dst, const SDL_Rect *dstrect)
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{
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return SDL_UpperSoftStretch(src, srcrect, dst, dstrect, SDL_ScaleModeLinear);
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}
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static int
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SDL_UpperSoftStretch(SDL_Surface * src, const SDL_Rect * srcrect,
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SDL_Surface * dst, const SDL_Rect * dstrect, SDL_ScaleMode scaleMode)
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@ -274,6 +282,8 @@ SDL_UpperSoftStretch(SDL_Surface * src, const SDL_Rect * srcrect,
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if (scaleMode == SDL_ScaleModeNearest) {
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ret = SDL_SoftStretchLowerNearest(src, srcrect, dst, dstrect);
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} else {
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ret = SDL_SoftStretchLowerLinear(src, srcrect, dst, dstrect);
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}
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/* We need to unlock the surfaces if they're locked */
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@ -376,4 +386,713 @@ SDL_SoftStretchLowerNearest(SDL_Surface *src, const SDL_Rect *srcrect,
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return 0;
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}
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/* bilinear interpolation precision must be < 8
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Because with SSE: add-multiply: _mm_madd_epi16 works with signed int
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so pixels 0xb1...... are negatives and false the result
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same in NEON probably */
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#define PRECISION 7
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#define FIXED_POINT(i) ((uint32_t)(i) << 16)
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#define SRC_INDEX(fp) ((uint32_t)(fp) >> 16)
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#define INTEGER(fp) ((uint32_t)(fp) >> PRECISION)
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#define FRAC(fp) ((uint32_t)(fp >> (16 - PRECISION)) & ((1<<PRECISION) - 1))
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#define FRAC_ZERO 0
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#define FRAC_ONE (1 << PRECISION)
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#define FP_ONE FIXED_POINT(1)
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#define BILINEAR___START \
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int i; \
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int fp_sum_h, fp_step_h, left_pad_h, right_pad_h; \
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int fp_sum_w, fp_step_w, left_pad_w, right_pad_w; \
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int fp_sum_w_init, left_pad_w_init, right_pad_w_init, dst_gap, middle_init; \
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get_scaler_datas(src_h, dst_h, &fp_sum_h, &fp_step_h, &left_pad_h, &right_pad_h); \
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get_scaler_datas(src_w, dst_w, &fp_sum_w, &fp_step_w, &left_pad_w, &right_pad_w); \
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fp_sum_w_init = fp_sum_w + left_pad_w * fp_step_w; \
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left_pad_w_init = left_pad_w; \
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right_pad_w_init = right_pad_w; \
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dst_gap = dst_pitch - 4 * dst_w; \
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middle_init = dst_w - left_pad_w - right_pad_w; \
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#define BILINEAR___HEIGHT \
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int index_h, frac_h0, frac_h1, middle; \
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const Uint32 *src_h0, *src_h1; \
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int no_padding, incr_h0, incr_h1; \
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\
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no_padding = !(i < left_pad_h || i > dst_h - 1 - right_pad_h); \
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index_h = SRC_INDEX(fp_sum_h); \
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frac_h0 = FRAC(fp_sum_h); \
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\
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index_h = no_padding ? index_h : (i < left_pad_h ? 0 : src_h - 1); \
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frac_h0 = no_padding ? frac_h0 : 0; \
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incr_h1 = no_padding ? src_pitch : 0; \
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incr_h0 = index_h * src_pitch; \
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\
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src_h0 = (const Uint32 *)((const Uint8 *)src + incr_h0); \
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src_h1 = (const Uint32 *)((const Uint8 *)src_h0 + incr_h1); \
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\
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fp_sum_h += fp_step_h; \
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\
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frac_h1 = FRAC_ONE - frac_h0; \
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fp_sum_w = fp_sum_w_init; \
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right_pad_w = right_pad_w_init; \
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left_pad_w = left_pad_w_init; \
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middle = middle_init; \
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static void
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#if defined(__clang__)
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// Remove inlining of this function
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// Crash with clang 9.0.8 / android-ndk-r21d
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// Ok with clang 11.0.5 / android-ndk-22
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# if __clang_major__ == 9 && __clang_minor__ == 0 && __clang_patchlevel__ == 8
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__attribute__((noinline))
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# endif
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#endif
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get_scaler_datas(int src_nb, int dst_nb, int *fp_start, int *fp_step, int *left_pad, int *right_pad)
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{
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int step = FIXED_POINT(src_nb) / (dst_nb); /* source step in fixed point */
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int x0 = FP_ONE / 2; /* dst first pixel center at 0.5 in fixed point */
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int fp_sum;
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int i;
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#if 0
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/* scale to source coordinates */
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x0 *= src_nb;
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x0 /= dst_nb; /* x0 == step / 2 */
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#else
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/* Use this code for perfect match with pixman */
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Sint64 tmp[2];
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tmp[0] = (Sint64)step * (x0 >> 16);
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tmp[1] = (Sint64)step * (x0 & 0xFFFF);
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x0 = tmp[0] + ((tmp[1] + 0x8000) >> 16); /* x0 == (step + 1) / 2 */
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#endif
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/* -= 0.5, get back the pixel origin, in source coordinates */
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x0 -= FP_ONE / 2;
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*fp_start = x0;
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*fp_step = step;
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*left_pad = 0;
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*right_pad = 0;
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fp_sum = x0;
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for (i = 0; i < dst_nb; i++) {
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if (fp_sum < 0) {
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*left_pad += 1;
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} else {
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int index = SRC_INDEX(fp_sum);
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if (index > src_nb - 2) {
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*right_pad += 1;
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}
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}
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fp_sum += step;
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}
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// 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);
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}
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typedef struct color_t {
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Uint8 a;
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Uint8 b;
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Uint8 c;
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Uint8 d;
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} color_t;
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#if 0
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static void
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printf_64(const char *str, void *var)
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{
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uint8_t *val = (uint8_t*) var;
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printf(" * %s: %02x %02x %02x %02x _ %02x %02x %02x %02x\n",
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str, val[0], val[1], val[2], val[3], val[4], val[5], val[6], val[7]);
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}
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#endif
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/* Interpolated == x0 + frac * (x1 - x0) == x0 * (1 - frac) + x1 * frac */
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static inline void
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INTERPOL(const Uint32 *src_x0, const Uint32 *src_x1, int frac0, int frac1, Uint32 *dst)
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{
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const color_t *c0 = (const color_t *)src_x0;
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const color_t *c1 = (const color_t *)src_x1;
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color_t *cx = (color_t *)dst;
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#if 0
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cx->a = c0->a + INTEGER(frac0 * (c1->a - c0->a));
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cx->b = c0->b + INTEGER(frac0 * (c1->b - c0->b));
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cx->c = c0->c + INTEGER(frac0 * (c1->c - c0->c));
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cx->d = c0->d + INTEGER(frac0 * (c1->d - c0->d));
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#else
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cx->a = INTEGER(frac1 * c0->a + frac0 * c1->a);
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cx->b = INTEGER(frac1 * c0->b + frac0 * c1->b);
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cx->c = INTEGER(frac1 * c0->c + frac0 * c1->c);
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cx->d = INTEGER(frac1 * c0->d + frac0 * c1->d);
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#endif
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}
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static inline void
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INTERPOL_BILINEAR(const Uint32 *s0, const Uint32 *s1, int frac_w0, int frac_h0, int frac_h1, Uint32 *dst)
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{
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Uint32 tmp[2];
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unsigned int frac_w1 = FRAC_ONE - frac_w0;
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/* Vertical first, store to 'tmp' */
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INTERPOL(s0, s1, frac_h0, frac_h1, tmp);
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INTERPOL(s0 + 1, s1 + 1, frac_h0, frac_h1, tmp + 1);
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/* Horizontal, store to 'dst' */
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INTERPOL(tmp, tmp + 1, frac_w0, frac_w1, dst);
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}
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static int
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scale_mat(const Uint32 *src, int src_w, int src_h, int src_pitch,
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Uint32 *dst, int dst_w, int dst_h, int dst_pitch)
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{
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BILINEAR___START
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for (i = 0; i < dst_h; i++) {
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BILINEAR___HEIGHT
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while (left_pad_w--) {
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INTERPOL_BILINEAR(src_h0, src_h1, FRAC_ZERO, frac_h0, frac_h1, dst);
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dst += 1;
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}
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while (middle--) {
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const Uint32 *s_00_01;
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const Uint32 *s_10_11;
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int index_w = 4 * SRC_INDEX(fp_sum_w);
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int frac_w = FRAC(fp_sum_w);
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fp_sum_w += fp_step_w;
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/*
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x00 ... x0_ ..... x01
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. . .
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. x .
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. . .
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. . .
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x10 ... x1_ ..... x11
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*/
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s_00_01 = (const Uint32 *)((const Uint8 *)src_h0 + index_w);
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s_10_11 = (const Uint32 *)((const Uint8 *)src_h1 + index_w);
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INTERPOL_BILINEAR(s_00_01, s_10_11, frac_w, frac_h0, frac_h1, dst);
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dst += 1;
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}
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while (right_pad_w--) {
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int index_w = 4 * (src_w - 2);
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const Uint32 *s_00_01 = (const Uint32 *)((const Uint8 *)src_h0 + index_w);
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const Uint32 *s_10_11 = (const Uint32 *)((const Uint8 *)src_h1 + index_w);
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INTERPOL_BILINEAR(s_00_01, s_10_11, FRAC_ONE, frac_h0, frac_h1, dst);
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dst += 1;
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}
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dst = (Uint32 *)((Uint8 *)dst + dst_gap);
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}
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return 0;
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}
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#if defined(__SSE2__)
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# define HAVE_SSE2_INTRINSICS 1
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#endif
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#if defined(__ARM_NEON)
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# define HAVE_NEON_INTRINSICS 1
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#endif
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/* TODO: this didn't compile on Window10 universal package last time I tried .. */
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#if defined(__WINRT__)
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# if defined(HAVE_NEON_INTRINSICS)
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# undef HAVE_NEON_INTRINSICS
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# endif
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#endif
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#if defined(HAVE_SSE2_INTRINSICS)
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#if 0
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static void
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printf_128(const char *str, __m128i var)
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{
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uint16_t *val = (uint16_t*) &var;
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printf(" * %s: %04x %04x %04x %04x _ %04x %04x %04x %04x\n",
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str, val[0], val[1], val[2], val[3], val[4], val[5], val[6], val[7]);
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}
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#endif
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static inline int
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hasSSE2()
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{
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static int val = -1;
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if (val != -1) {
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return val;
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}
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val = SDL_HasSSE2();
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return val;
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}
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static inline void
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INTERPOL_BILINEAR_SSE(const Uint32 *s0, const Uint32 *s1, int frac_w, __m128i v_frac_h0, __m128i v_frac_h1, Uint32 *dst, __m128i zero)
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{
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__m128i x_00_01, x_10_11; /* Pixels in 4*uint8 in row */
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__m128i v_frac_w0, k0, l0, d0, e0;
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int f, f2;
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f = frac_w;
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f2 = FRAC_ONE - frac_w;
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v_frac_w0 = _mm_set_epi16(f, f2, f, f2, f, f2, f, f2);
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x_00_01 = _mm_loadl_epi64((const __m128i *)s0); /* Load x00 and x01 */
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x_10_11 = _mm_loadl_epi64((const __m128i *)s1);
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/* Interpolated == x0 + frac * (x1 - x0) == x0 * (1 - frac) + x1 * frac */
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/* Interpolation vertical */
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k0 = _mm_mullo_epi16(_mm_unpacklo_epi8(x_00_01, zero), v_frac_h1);
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l0 = _mm_mullo_epi16(_mm_unpacklo_epi8(x_10_11, zero), v_frac_h0);
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k0 = _mm_add_epi16(k0, l0);
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/* For perfect match, clear the factionnal part eventually. */
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/*
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k0 = _mm_srli_epi16(k0, PRECISION);
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k0 = _mm_slli_epi16(k0, PRECISION);
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*/
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/* Interpolation horizontal */
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l0 = _mm_unpacklo_epi64(/* unused */ l0, k0);
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k0 = _mm_madd_epi16(_mm_unpackhi_epi16(l0, k0), v_frac_w0);
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/* Store 1 pixel */
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d0 = _mm_srli_epi32(k0, PRECISION * 2);
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e0 = _mm_packs_epi32(d0, d0);
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e0 = _mm_packus_epi16(e0, e0);
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*dst = _mm_cvtsi128_si32(e0);
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}
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static int
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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)
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{
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BILINEAR___START
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for (i = 0; i < dst_h; i++) {
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int nb_block2;
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__m128i v_frac_h0;
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__m128i v_frac_h1;
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__m128i zero;
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BILINEAR___HEIGHT
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nb_block2 = middle / 2;
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v_frac_h0 = _mm_set_epi16(frac_h0, frac_h0, frac_h0, frac_h0, frac_h0, frac_h0, frac_h0, frac_h0);
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v_frac_h1 = _mm_set_epi16(frac_h1, frac_h1, frac_h1, frac_h1, frac_h1, frac_h1, frac_h1, frac_h1);
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zero = _mm_setzero_si128();
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while (left_pad_w--) {
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INTERPOL_BILINEAR_SSE(src_h0, src_h1, FRAC_ZERO, v_frac_h0, v_frac_h1, dst, zero);
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dst += 1;
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}
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while (nb_block2--) {
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int index_w_0, frac_w_0;
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int index_w_1, frac_w_1;
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const Uint32 *s_00_01, *s_02_03, *s_10_11, *s_12_13;
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__m128i x_00_01, x_10_11, x_02_03, x_12_13;/* Pixels in 4*uint8 in row */
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__m128i v_frac_w0, k0, l0, d0, e0;
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__m128i v_frac_w1, k1, l1, d1, e1;
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int f, f2;
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index_w_0 = 4 * SRC_INDEX(fp_sum_w);
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frac_w_0 = FRAC(fp_sum_w);
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fp_sum_w += fp_step_w;
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index_w_1 = 4 * SRC_INDEX(fp_sum_w);
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frac_w_1 = FRAC(fp_sum_w);
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fp_sum_w += fp_step_w;
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/*
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x00............ x01 x02...........x03
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. . . . . .
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j0 f0 j1 j2 f1 j3
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. . . . . .
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. . . . . .
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. . . . . .
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x10............ x11 x12...........x13
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*/
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s_00_01 = (const Uint32 *)((const Uint8 *)src_h0 + index_w_0);
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s_02_03 = (const Uint32 *)((const Uint8 *)src_h0 + index_w_1);
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s_10_11 = (const Uint32 *)((const Uint8 *)src_h1 + index_w_0);
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s_12_13 = (const Uint32 *)((const Uint8 *)src_h1 + index_w_1);
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f = frac_w_0;
|
||||
f2 = FRAC_ONE - frac_w_0;
|
||||
v_frac_w0 = _mm_set_epi16(f, f2, f, f2, f, f2, f, f2);
|
||||
|
||||
f = frac_w_1;
|
||||
f2 = FRAC_ONE - frac_w_1;
|
||||
v_frac_w1 = _mm_set_epi16(f, f2, f, f2, f, f2, f, 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 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(HAVE_NEON_INTRINSICS)
|
||||
|
||||
static inline int
|
||||
hasNEON()
|
||||
{
|
||||
static int val = -1;
|
||||
if (val != -1) {
|
||||
return val;
|
||||
}
|
||||
val = SDL_HasNEON();
|
||||
return val;
|
||||
}
|
||||
|
||||
static 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 = (uint8x8_t)vld1_u32(s0); /* Load 2 pixels */
|
||||
x_10_11 = (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((uint32x2_t)e0, 0);
|
||||
}
|
||||
|
||||
static int
|
||||
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 = (uint8x8_t)vld1_u32(s_00_01); /* Load 2 pixels */
|
||||
x_02_03 = (uint8x8_t)vld1_u32(s_02_03);
|
||||
x_04_05 = (uint8x8_t)vld1_u32(s_04_05);
|
||||
x_06_07 = (uint8x8_t)vld1_u32(s_06_07);
|
||||
x_10_11 = (uint8x8_t)vld1_u32(s_10_11);
|
||||
x_12_13 = (uint8x8_t)vld1_u32(s_12_13);
|
||||
x_14_15 = (uint8x8_t)vld1_u32(s_14_15);
|
||||
x_16_17 = (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((uint32x2_t)e0, (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 = (uint8x8_t)vld1_u32(s_00_01);/* Load 2 pixels */
|
||||
x_02_03 = (uint8x8_t)vld1_u32(s_02_03);
|
||||
x_10_11 = (uint8x8_t)vld1_u32(s_10_11);
|
||||
x_12_13 = (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, (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 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
int
|
||||
SDL_SoftStretchLowerLinear(SDL_Surface *s, const SDL_Rect *srcrect,
|
||||
SDL_Surface *d, const SDL_Rect *dstrect)
|
||||
{
|
||||
int ret = -1;
|
||||
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);
|
||||
|
||||
#if defined(HAVE_NEON_INTRINSICS)
|
||||
if (ret == -1 && hasNEON()) {
|
||||
ret = scale_mat_NEON(src, src_w, src_h, src_pitch, dst, dst_w, dst_h, dst_pitch);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(HAVE_SSE2_INTRINSICS)
|
||||
if (ret == -1 && hasSSE2()) {
|
||||
ret = scale_mat_SSE(src, src_w, src_h, src_pitch, dst, dst_w, dst_h, dst_pitch);
|
||||
}
|
||||
#endif
|
||||
|
||||
if (ret == -1) {
|
||||
scale_mat(src, src_w, src_h, src_pitch, dst, dst_w, dst_h, dst_pitch);
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* vi: set ts=4 sw=4 expandtab: */
|
||||
|
|
|
|||
Loading…
Reference in New Issue