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-rw-r--r--gfx/2d/ssse3-scaler.c561
1 files changed, 561 insertions, 0 deletions
diff --git a/gfx/2d/ssse3-scaler.c b/gfx/2d/ssse3-scaler.c
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index 000000000..345844b84
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+++ b/gfx/2d/ssse3-scaler.c
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+/*
+ * Copyright © 2013 Soren Sandmann Pedersen
+ * Copyright © 2013 Red Hat, Inc.
+ * Copyright © 2016 Mozilla Foundation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Author: Soren Sandmann (soren.sandmann@gmail.com)
+ * Jeff Muizelaar (jmuizelaar@mozilla.com)
+ */
+
+/* This has been adapted from the ssse3 code from pixman. It's currently
+ * a mess as I want to try it out in practice before finalizing the details.
+ */
+
+#include <stdlib.h>
+#include <mmintrin.h>
+#include <xmmintrin.h>
+#include <emmintrin.h>
+#include <tmmintrin.h>
+#include <stdint.h>
+#include <assert.h>
+
+typedef int32_t pixman_fixed_16_16_t;
+typedef pixman_fixed_16_16_t pixman_fixed_t;
+#define pixman_fixed_1 (pixman_int_to_fixed(1))
+#define pixman_fixed_to_int(f) ((int) ((f) >> 16))
+#define pixman_int_to_fixed(i) ((pixman_fixed_t) ((i) << 16))
+#define pixman_double_to_fixed(d) ((pixman_fixed_t) ((d) * 65536.0))
+typedef struct pixman_vector pixman_vector_t;
+
+typedef int pixman_bool_t;
+typedef int64_t pixman_fixed_32_32_t;
+typedef pixman_fixed_32_32_t pixman_fixed_48_16_t;
+typedef struct { pixman_fixed_48_16_t v[3]; } pixman_vector_48_16_t;
+
+struct pixman_vector
+{
+ pixman_fixed_t vector[3];
+};
+typedef struct pixman_transform pixman_transform_t;
+
+struct pixman_transform
+{
+ pixman_fixed_t matrix[3][3];
+};
+
+#ifdef _MSC_VER
+#define force_inline __forceinline
+#else
+#define force_inline __inline__ __attribute__((always_inline))
+#endif
+
+#define BILINEAR_INTERPOLATION_BITS 6
+
+static force_inline int
+pixman_fixed_to_bilinear_weight (pixman_fixed_t x)
+{
+ return (x >> (16 - BILINEAR_INTERPOLATION_BITS)) &
+ ((1 << BILINEAR_INTERPOLATION_BITS) - 1);
+}
+
+static void
+pixman_transform_point_31_16_3d (const pixman_transform_t *t,
+ const pixman_vector_48_16_t *v,
+ pixman_vector_48_16_t *result)
+{
+ int i;
+ int64_t tmp[3][2];
+
+ /* input vector values must have no more than 31 bits (including sign)
+ * in the integer part */
+ assert (v->v[0] < ((pixman_fixed_48_16_t)1 << (30 + 16)));
+ assert (v->v[0] >= -((pixman_fixed_48_16_t)1 << (30 + 16)));
+ assert (v->v[1] < ((pixman_fixed_48_16_t)1 << (30 + 16)));
+ assert (v->v[1] >= -((pixman_fixed_48_16_t)1 << (30 + 16)));
+ assert (v->v[2] < ((pixman_fixed_48_16_t)1 << (30 + 16)));
+ assert (v->v[2] >= -((pixman_fixed_48_16_t)1 << (30 + 16)));
+
+ for (i = 0; i < 3; i++)
+ {
+ tmp[i][0] = (int64_t)t->matrix[i][0] * (v->v[0] >> 16);
+ tmp[i][1] = (int64_t)t->matrix[i][0] * (v->v[0] & 0xFFFF);
+ tmp[i][0] += (int64_t)t->matrix[i][1] * (v->v[1] >> 16);
+ tmp[i][1] += (int64_t)t->matrix[i][1] * (v->v[1] & 0xFFFF);
+ tmp[i][0] += (int64_t)t->matrix[i][2] * (v->v[2] >> 16);
+ tmp[i][1] += (int64_t)t->matrix[i][2] * (v->v[2] & 0xFFFF);
+ }
+
+ result->v[0] = tmp[0][0] + ((tmp[0][1] + 0x8000) >> 16);
+ result->v[1] = tmp[1][0] + ((tmp[1][1] + 0x8000) >> 16);
+ result->v[2] = tmp[2][0] + ((tmp[2][1] + 0x8000) >> 16);
+}
+
+static pixman_bool_t
+pixman_transform_point_3d (const struct pixman_transform *transform,
+ struct pixman_vector * vector)
+{
+ pixman_vector_48_16_t tmp;
+ tmp.v[0] = vector->vector[0];
+ tmp.v[1] = vector->vector[1];
+ tmp.v[2] = vector->vector[2];
+
+ pixman_transform_point_31_16_3d (transform, &tmp, &tmp);
+
+ vector->vector[0] = tmp.v[0];
+ vector->vector[1] = tmp.v[1];
+ vector->vector[2] = tmp.v[2];
+
+ return vector->vector[0] == tmp.v[0] &&
+ vector->vector[1] == tmp.v[1] &&
+ vector->vector[2] == tmp.v[2];
+}
+
+
+struct bits_image_t
+{
+ uint32_t * bits;
+ int rowstride;
+ pixman_transform_t *transform;
+};
+
+typedef struct bits_image_t bits_image_t;
+typedef struct {
+ int unused;
+} pixman_iter_info_t;
+
+typedef struct pixman_iter_t pixman_iter_t;
+typedef void (* pixman_iter_fini_t) (pixman_iter_t *iter);
+
+struct pixman_iter_t
+{
+ int x, y;
+ pixman_iter_fini_t fini;
+ bits_image_t *image;
+ uint32_t * buffer;
+ int width;
+ int height;
+ void * data;
+};
+
+typedef struct
+{
+ int y;
+ uint64_t * buffer;
+} line_t;
+
+typedef struct
+{
+ line_t lines[2];
+ pixman_fixed_t y;
+ pixman_fixed_t x;
+ uint64_t data[1];
+} bilinear_info_t;
+
+static void
+ssse3_fetch_horizontal (bits_image_t *image, line_t *line,
+ int y, pixman_fixed_t x, pixman_fixed_t ux, int n)
+{
+ uint32_t *bits = image->bits + y * image->rowstride;
+ __m128i vx = _mm_set_epi16 (
+ - (x + 1), x, - (x + 1), x,
+ - (x + ux + 1), x + ux, - (x + ux + 1), x + ux);
+ __m128i vux = _mm_set_epi16 (
+ - 2 * ux, 2 * ux, - 2 * ux, 2 * ux,
+ - 2 * ux, 2 * ux, - 2 * ux, 2 * ux);
+ __m128i vaddc = _mm_set_epi16 (1, 0, 1, 0, 1, 0, 1, 0);
+ __m128i *b = (__m128i *)line->buffer;
+ __m128i vrl0, vrl1;
+
+ while ((n -= 2) >= 0)
+ {
+ __m128i vw, vr, s;
+#ifdef HACKY_PADDING
+ if (pixman_fixed_to_int(x + ux) >= image->rowstride) {
+ vrl1 = _mm_setzero_si128();
+ printf("overread 2loop\n");
+ } else {
+ if (pixman_fixed_to_int(x + ux) < 0)
+ printf("underflow\n");
+ vrl1 = _mm_loadl_epi64(
+ (__m128i *)(bits + (pixman_fixed_to_int(x + ux) < 0 ? 0 : pixman_fixed_to_int(x + ux))));
+ }
+#else
+ vrl1 = _mm_loadl_epi64(
+ (__m128i *)(bits + pixman_fixed_to_int(x + ux)));
+#endif
+ /* vrl1: R1, L1 */
+
+ final_pixel:
+#ifdef HACKY_PADDING
+ vrl0 = _mm_loadl_epi64 (
+ (__m128i *)(bits + (pixman_fixed_to_int (x) < 0 ? 0 : pixman_fixed_to_int (x))));
+#else
+ vrl0 = _mm_loadl_epi64 (
+ (__m128i *)(bits + pixman_fixed_to_int (x)));
+#endif
+ /* vrl0: R0, L0 */
+
+ /* The weights are based on vx which is a vector of
+ *
+ * - (x + 1), x, - (x + 1), x,
+ * - (x + ux + 1), x + ux, - (x + ux + 1), x + ux
+ *
+ * so the 16 bit weights end up like this:
+ *
+ * iw0, w0, iw0, w0, iw1, w1, iw1, w1
+ *
+ * and after shifting and packing, we get these bytes:
+ *
+ * iw0, w0, iw0, w0, iw1, w1, iw1, w1,
+ * iw0, w0, iw0, w0, iw1, w1, iw1, w1,
+ *
+ * which means the first and the second input pixel
+ * have to be interleaved like this:
+ *
+ * la0, ra0, lr0, rr0, la1, ra1, lr1, rr1,
+ * lg0, rg0, lb0, rb0, lg1, rg1, lb1, rb1
+ *
+ * before maddubsw can be used.
+ */
+
+ vw = _mm_add_epi16 (
+ vaddc, _mm_srli_epi16 (vx, 16 - BILINEAR_INTERPOLATION_BITS));
+ /* vw: iw0, w0, iw0, w0, iw1, w1, iw1, w1
+ */
+
+ vw = _mm_packus_epi16 (vw, vw);
+ /* vw: iw0, w0, iw0, w0, iw1, w1, iw1, w1,
+ * iw0, w0, iw0, w0, iw1, w1, iw1, w1
+ */
+ vx = _mm_add_epi16 (vx, vux);
+
+ x += 2 * ux;
+
+ vr = _mm_unpacklo_epi16 (vrl1, vrl0);
+ /* vr: rar0, rar1, rgb0, rgb1, lar0, lar1, lgb0, lgb1 */
+
+ s = _mm_shuffle_epi32 (vr, _MM_SHUFFLE (1, 0, 3, 2));
+ /* s: lar0, lar1, lgb0, lgb1, rar0, rar1, rgb0, rgb1 */
+
+ vr = _mm_unpackhi_epi8 (vr, s);
+ /* vr: la0, ra0, lr0, rr0, la1, ra1, lr1, rr1,
+ * lg0, rg0, lb0, rb0, lg1, rg1, lb1, rb1
+ */
+
+ vr = _mm_maddubs_epi16 (vr, vw);
+
+ /* When the weight is 0, the inverse weight is
+ * 128 which can't be represented in a signed byte.
+ * As a result maddubsw computes the following:
+ *
+ * r = l * -128 + r * 0
+ *
+ * rather than the desired
+ *
+ * r = l * 128 + r * 0
+ *
+ * We fix this by taking the absolute value of the
+ * result.
+ */
+ // we can drop this if we use lower precision
+
+ vr = _mm_shuffle_epi32 (vr, _MM_SHUFFLE (2, 0, 3, 1));
+ /* vr: A0, R0, A1, R1, G0, B0, G1, B1 */
+ _mm_store_si128 (b++, vr);
+ }
+
+ if (n == -1)
+ {
+ vrl1 = _mm_setzero_si128();
+ goto final_pixel;
+ }
+
+ line->y = y;
+}
+
+// scale a line of destination pixels
+static uint32_t *
+ssse3_fetch_bilinear_cover (pixman_iter_t *iter, const uint32_t *mask)
+{
+ pixman_fixed_t fx, ux;
+ bilinear_info_t *info = iter->data;
+ line_t *line0, *line1;
+ int y0, y1;
+ int32_t dist_y;
+ __m128i vw, uvw;
+ int i;
+
+ fx = info->x;
+ ux = iter->image->transform->matrix[0][0];
+
+ y0 = pixman_fixed_to_int (info->y);
+ if (y0 < 0)
+ *(volatile char*)0 = 9;
+ y1 = y0 + 1;
+
+ // clamping in y direction
+ if (y1 >= iter->height) {
+ y1 = iter->height - 1;
+ }
+
+ line0 = &info->lines[y0 & 0x01];
+ line1 = &info->lines[y1 & 0x01];
+
+ if (line0->y != y0)
+ {
+ ssse3_fetch_horizontal (
+ iter->image, line0, y0, fx, ux, iter->width);
+ }
+
+ if (line1->y != y1)
+ {
+ ssse3_fetch_horizontal (
+ iter->image, line1, y1, fx, ux, iter->width);
+ }
+
+#ifdef PIXMAN_STYLE_INTERPOLATION
+ dist_y = pixman_fixed_to_bilinear_weight (info->y);
+ dist_y <<= (16 - BILINEAR_INTERPOLATION_BITS);
+
+ vw = _mm_set_epi16 (
+ dist_y, dist_y, dist_y, dist_y, dist_y, dist_y, dist_y, dist_y);
+
+#else
+ // setup the weights for the top (vw) and bottom (uvw) lines
+ dist_y = pixman_fixed_to_bilinear_weight (info->y);
+ // we use 15 instead of 16 because we need an extra bit to handle when the weights are 0 and 1
+ dist_y <<= (15 - BILINEAR_INTERPOLATION_BITS);
+
+ vw = _mm_set_epi16 (
+ dist_y, dist_y, dist_y, dist_y, dist_y, dist_y, dist_y, dist_y);
+
+
+ dist_y = (1 << BILINEAR_INTERPOLATION_BITS) - pixman_fixed_to_bilinear_weight (info->y);
+ dist_y <<= (15 - BILINEAR_INTERPOLATION_BITS);
+ uvw = _mm_set_epi16 (
+ dist_y, dist_y, dist_y, dist_y, dist_y, dist_y, dist_y, dist_y);
+#endif
+
+ for (i = 0; i + 3 < iter->width; i += 4)
+ {
+ __m128i top0 = _mm_load_si128 ((__m128i *)(line0->buffer + i));
+ __m128i bot0 = _mm_load_si128 ((__m128i *)(line1->buffer + i));
+ __m128i top1 = _mm_load_si128 ((__m128i *)(line0->buffer + i + 2));
+ __m128i bot1 = _mm_load_si128 ((__m128i *)(line1->buffer + i + 2));
+#ifdef PIXMAN_STYLE_INTERPOLATION
+ __m128i r0, r1, tmp, p;
+
+ r0 = _mm_mulhi_epu16 (
+ _mm_sub_epi16 (bot0, top0), vw);
+ tmp = _mm_cmplt_epi16 (bot0, top0);
+ tmp = _mm_and_si128 (tmp, vw);
+ r0 = _mm_sub_epi16 (r0, tmp);
+ r0 = _mm_add_epi16 (r0, top0);
+ r0 = _mm_srli_epi16 (r0, BILINEAR_INTERPOLATION_BITS);
+ /* r0: A0 R0 A1 R1 G0 B0 G1 B1 */
+ //r0 = _mm_shuffle_epi32 (r0, _MM_SHUFFLE (2, 0, 3, 1));
+ /* r0: A1 R1 G1 B1 A0 R0 G0 B0 */
+
+ // tmp = bot1 < top1 ? vw : 0;
+ // r1 = (bot1 - top1)*vw + top1 - tmp
+ // r1 = bot1*vw - vw*top1 + top1 - tmp
+ // r1 = bot1*vw + top1 - vw*top1 - tmp
+ // r1 = bot1*vw + top1*(1 - vw) - tmp
+ r1 = _mm_mulhi_epu16 (
+ _mm_sub_epi16 (bot1, top1), vw);
+ tmp = _mm_cmplt_epi16 (bot1, top1);
+ tmp = _mm_and_si128 (tmp, vw);
+ r1 = _mm_sub_epi16 (r1, tmp);
+ r1 = _mm_add_epi16 (r1, top1);
+ r1 = _mm_srli_epi16 (r1, BILINEAR_INTERPOLATION_BITS);
+ //r1 = _mm_shuffle_epi32 (r1, _MM_SHUFFLE (2, 0, 3, 1));
+ /* r1: A3 R3 G3 B3 A2 R2 G2 B2 */
+#else
+ __m128i r0, r1, p;
+ top0 = _mm_mulhi_epu16 (top0, uvw);
+ bot0 = _mm_mulhi_epu16 (bot0, vw);
+ r0 = _mm_add_epi16(top0, bot0);
+ r0 = _mm_srli_epi16(r0, BILINEAR_INTERPOLATION_BITS-1);
+
+ top1 = _mm_mulhi_epu16 (top1, uvw);
+ bot1 = _mm_mulhi_epu16 (bot1, vw);
+ r1 = _mm_add_epi16(top1, bot1);
+ r1 = _mm_srli_epi16(r1, BILINEAR_INTERPOLATION_BITS-1);
+#endif
+
+ p = _mm_packus_epi16 (r0, r1);
+ _mm_storeu_si128 ((__m128i *)(iter->buffer + i), p);
+ }
+
+ while (i < iter->width)
+ {
+ __m128i top0 = _mm_load_si128 ((__m128i *)(line0->buffer + i));
+ __m128i bot0 = _mm_load_si128 ((__m128i *)(line1->buffer + i));
+
+#ifdef PIXMAN_STYLE_INTERPOLATION
+ __m128i r0, tmp, p;
+ r0 = _mm_mulhi_epu16 (
+ _mm_sub_epi16 (bot0, top0), vw);
+ tmp = _mm_cmplt_epi16 (bot0, top0);
+ tmp = _mm_and_si128 (tmp, vw);
+ r0 = _mm_sub_epi16 (r0, tmp);
+ r0 = _mm_add_epi16 (r0, top0);
+ r0 = _mm_srli_epi16 (r0, BILINEAR_INTERPOLATION_BITS);
+ /* r0: A0 R0 A1 R1 G0 B0 G1 B1 */
+ r0 = _mm_shuffle_epi32 (r0, _MM_SHUFFLE (2, 0, 3, 1));
+ /* r0: A1 R1 G1 B1 A0 R0 G0 B0 */
+#else
+ __m128i r0, p;
+ top0 = _mm_mulhi_epu16 (top0, uvw);
+ bot0 = _mm_mulhi_epu16 (bot0, vw);
+ r0 = _mm_add_epi16(top0, bot0);
+ r0 = _mm_srli_epi16(r0, BILINEAR_INTERPOLATION_BITS-1);
+#endif
+
+ p = _mm_packus_epi16 (r0, r0);
+
+ if (iter->width - i == 1)
+ {
+ *(uint32_t *)(iter->buffer + i) = _mm_cvtsi128_si32 (p);
+ i++;
+ }
+ else
+ {
+ _mm_storel_epi64 ((__m128i *)(iter->buffer + i), p);
+ i += 2;
+ }
+ }
+
+ info->y += iter->image->transform->matrix[1][1];
+
+ return iter->buffer;
+}
+
+static void
+ssse3_bilinear_cover_iter_fini (pixman_iter_t *iter)
+{
+ free (iter->data);
+}
+
+static void
+ssse3_bilinear_cover_iter_init (pixman_iter_t *iter)
+{
+ int width = iter->width;
+ bilinear_info_t *info;
+ pixman_vector_t v;
+
+ /* Reference point is the center of the pixel */
+ v.vector[0] = pixman_int_to_fixed (iter->x) + pixman_fixed_1 / 2;
+ v.vector[1] = pixman_int_to_fixed (iter->y) + pixman_fixed_1 / 2;
+ v.vector[2] = pixman_fixed_1;
+
+ if (!pixman_transform_point_3d (iter->image->transform, &v))
+ goto fail;
+
+ info = malloc (sizeof (*info) + (2 * width - 1) * sizeof (uint64_t) + 64);
+ if (!info)
+ goto fail;
+
+ info->x = v.vector[0] - pixman_fixed_1 / 2;
+ info->y = v.vector[1] - pixman_fixed_1 / 2;
+
+#define ALIGN(addr) \
+ ((void *)((((uintptr_t)(addr)) + 15) & (~15)))
+
+ /* It is safe to set the y coordinates to -1 initially
+ * because COVER_CLIP_BILINEAR ensures that we will only
+ * be asked to fetch lines in the [0, height) interval
+ */
+ info->lines[0].y = -1;
+ info->lines[0].buffer = ALIGN (&(info->data[0]));
+ info->lines[1].y = -1;
+ info->lines[1].buffer = ALIGN (info->lines[0].buffer + width);
+
+ iter->fini = ssse3_bilinear_cover_iter_fini;
+
+ iter->data = info;
+ return;
+
+fail:
+ /* Something went wrong, either a bad matrix or OOM; in such cases,
+ * we don't guarantee any particular rendering.
+ */
+ iter->fini = NULL;
+}
+
+/* scale the src from src_width/height to dest_width/height drawn
+ * into the rectangle x,y width,height
+ * src_stride and dst_stride are 4 byte units */
+void ssse3_scale_data(uint32_t *src, int src_width, int src_height, int src_stride,
+ uint32_t *dest, int dest_width, int dest_height,
+ int dest_stride,
+ int x, int y,
+ int width, int height)
+{
+ //XXX: assert(src_width > 1)
+ pixman_transform_t transform = {
+ { { pixman_fixed_1, 0, 0 },
+ { 0, pixman_fixed_1, 0 },
+ { 0, 0, pixman_fixed_1 } }
+ };
+ double width_scale = ((double)src_width)/dest_width;
+ double height_scale = ((double)src_height)/dest_height;
+#define AVOID_PADDING
+#ifdef AVOID_PADDING
+ // scale up by enough that we don't read outside of the bounds of the source surface
+ // currently this is required to avoid reading out of bounds.
+ if (width_scale < 1) {
+ width_scale = (double)(src_width-1)/dest_width;
+ transform.matrix[0][2] = pixman_fixed_1/2;
+ }
+ if (height_scale < 1) {
+ height_scale = (double)(src_height-1)/dest_height;
+ transform.matrix[1][2] = pixman_fixed_1/2;
+ }
+#endif
+ transform.matrix[0][0] = pixman_double_to_fixed(width_scale);
+ transform.matrix[1][1] = pixman_double_to_fixed(height_scale);
+ transform.matrix[2][2] = pixman_fixed_1;
+
+ bits_image_t image;
+ image.bits = src;
+ image.transform = &transform;
+ image.rowstride = src_stride;
+
+ pixman_iter_t iter;
+ iter.image = &image;
+ iter.x = x;
+ iter.y = y;
+ iter.width = width;
+ iter.height = src_height;
+ iter.buffer = dest;
+ iter.data = NULL;
+
+ ssse3_bilinear_cover_iter_init(&iter);
+ if (iter.data) {
+ for (int iy = 0; iy < height; iy++) {
+ ssse3_fetch_bilinear_cover(&iter, NULL);
+ iter.buffer += dest_stride;
+ }
+ ssse3_bilinear_cover_iter_fini(&iter);
+ }
+}
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