OpenTTD-patches/src/blitter/32bpp_sse2.cpp

380 lines
14 KiB
C++
Raw Normal View History

/* $Id$ */
/*
* This file is part of OpenTTD.
* OpenTTD 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, version 2.
* OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file 32bpp_sse2.cpp Implementation of the SSE2 32 bpp blitter. */
#ifdef WITH_SSE
#include "../stdafx.h"
#include "../zoom_func.h"
#include "../settings_type.h"
#include "32bpp_sse2.hpp"
/** Instantiation of the SSE2 32bpp blitter factory. */
static FBlitter_32bppSSE2 iFBlitter_32bppSSE2;
/**
* Draws a sprite to a (screen) buffer. It is templated to allow faster operation.
*
* @tparam mode blitter mode
* @param bp further blitting parameters
* @param zoom zoom level at which we are drawing
*/
IGNORE_UNINITIALIZED_WARNING_START
template <BlitterMode mode, Blitter_32bppSSE2::ReadMode read_mode, Blitter_32bppSSE2::BlockType bt_last>
inline void Blitter_32bppSSE2::Draw(const Blitter::BlitterParams *bp, ZoomLevel zoom)
{
Colour *dst_line = (Colour *) bp->dst + bp->top * bp->pitch + bp->left;
int effective_width = bp->width;
/* Find where to start reading in the source sprite */
const SpriteData * const sd = (const SpriteData *) bp->sprite;
const SpriteInfo * const si = &sd->infos[zoom];
const MapValue *src_mv_line = (const MapValue *) &sd->data[si->mv_offset] + bp->skip_top * si->sprite_width;
const Colour *src_rgba_line = (const Colour *) ((const byte *) &sd->data[si->sprite_offset] + bp->skip_top * si->sprite_line_size);
if (read_mode != RM_WITH_MARGIN) {
src_rgba_line += bp->skip_left;
src_mv_line += bp->skip_left;
}
/* Load these variables into register before loop. */
const __m128i clear_hi = CLEAR_HIGH_BYTE_MASK;
const __m128i tr_nom_base = TRANSPARENT_NOM_BASE;
for (int y = bp->height; y != 0; y--) {
Colour *dst = dst_line;
const Colour *src = src_rgba_line + META_LENGTH;
const MapValue *src_mv = src_mv_line;
switch (mode) {
default: {
switch (read_mode) {
case RM_WITH_MARGIN: {
src += src_rgba_line[0].data;
dst += src_rgba_line[0].data;
const int width_diff = si->sprite_width - bp->width;
effective_width = bp->width - (int) src_rgba_line[0].data;
const int delta_diff = (int) src_rgba_line[1].data - width_diff;
const int new_width = effective_width - (delta_diff & ~1);
effective_width = delta_diff > 0 ? new_width : effective_width;
if (effective_width <= 0) break;
/* FALLTHROUGH */
}
case RM_WITH_SKIP: {
for (uint x = (uint) effective_width / 2; x > 0; x--) {
__m128i srcABCD = _mm_loadu_si128((const __m128i*) src);
__m128i dstABCD = _mm_loadu_si128((__m128i*) dst);
ALPHA_BLEND_2();
*(uint64*) dst = EXTR64(srcABCD, 0);
src += 2;
dst += 2;
}
if (bt_last == BT_ODD) {
__m128i srcABCD = _mm_loadu_si128((const __m128i*) src);
__m128i dstABCD = _mm_loadu_si128((__m128i*) dst);
ALPHA_BLEND_2();
(*dst).data = EXTR32(srcABCD, 0);
}
break;
}
default: NOT_REACHED();
}
break;
}
case BM_COLOUR_REMAP: {
switch (read_mode) {
case RM_WITH_MARGIN: {
src += src_rgba_line[0].data;
src_mv += src_rgba_line[0].data;
dst += src_rgba_line[0].data;
const int width_diff = si->sprite_width - bp->width;
effective_width = bp->width - (int) src_rgba_line[0].data;
const int delta_diff = (int) src_rgba_line[1].data - width_diff;
const int nd = effective_width - delta_diff;
effective_width = delta_diff > 0 ? nd : effective_width;
if (effective_width <= 0) break;
/* FALLTHROUGH */
}
case RM_WITH_SKIP: {
const byte *remap = bp->remap;
for (uint x = (uint) effective_width; x != 0; x--) {
/* In case the m-channel is zero, do not remap this pixel in any way */
if (src_mv->m == 0) {
if (src->a < 255) {
__m128i srcABCD = _mm_loadu_si128((const __m128i*) src);
__m128i dstABCD = _mm_loadu_si128((__m128i*) dst);
ALPHA_BLEND_2();
(*dst).data = EXTR32(srcABCD, 0);
} else {
*dst = src->data;
}
} else {
const uint r = remap[src_mv->m];
if (r != 0) {
Colour remapped_colour = AdjustBrightness(this->LookupColourInPalette(r), src_mv->v);
if (src->a < 255) {
__m128i srcABCD;
__m128i dstABCD = _mm_loadu_si128((__m128i*) dst);
remapped_colour.a = src->a;
INSR32(remapped_colour.data, srcABCD, 0);
ALPHA_BLEND_2();
(*dst).data = EXTR32(srcABCD, 0);
} else
*dst = remapped_colour;
}
}
src_mv++;
dst++;
src++;
}
break;
}
default: NOT_REACHED();
}
src_mv_line += si->sprite_width;
break;
}
case BM_TRANSPARENT: {
/* Make the current colour a bit more black, so it looks like this image is transparent.
* rgb = rgb * ((256/4) * 4 - (alpha/4)) / ((256/4) * 4)
*/
__m128i srcABCD = _mm_loadu_si128((const __m128i*) src);
__m128i dstABCD = _mm_loadu_si128((__m128i*) dst);
for (uint x = (uint) bp->width / 2; x > 0; x--) {
__m128i srcAB = _mm_unpacklo_epi8(srcABCD, _mm_setzero_si128());
__m128i dstAB = _mm_unpacklo_epi8(dstABCD, _mm_setzero_si128());
__m128i dstCD = _mm_unpackhi_epi8(dstABCD, _mm_setzero_si128());
__m128i alphaAB = _mm_shufflelo_epi16(srcAB, 0x3F);
alphaAB = _mm_shufflehi_epi16(alphaAB, 0x3F);
alphaAB = _mm_srli_epi16(alphaAB, 2); // Reduce to 64 levels of shades so the max value fits in 16 bits.
__m128i nom = _mm_sub_epi16(tr_nom_base, alphaAB);
dstAB = _mm_mullo_epi16(dstAB, nom);
dstAB = _mm_srli_epi16(dstAB, 8);
dstAB = _mm_packus_epi16(dstAB, dstCD);
Colour *old_dst = dst;
src += 2;
dst += 2;
dstABCD = _mm_loadu_si128((__m128i*) dst);
_mm_storeu_si128((__m128i *) old_dst, dstAB);
srcABCD = _mm_loadu_si128((const __m128i*) src);
}
if (bp->width & 1) {
__m128i srcAB = _mm_unpacklo_epi8(srcABCD, _mm_setzero_si128());
__m128i dstAB = _mm_unpacklo_epi8(dstABCD, _mm_setzero_si128());
__m128i alphaAB = _mm_shufflelo_epi16(srcAB, 0x3F);
alphaAB = _mm_shufflehi_epi16(alphaAB, 0x3F);
alphaAB = _mm_srli_epi16(alphaAB, 2);
__m128i nom = _mm_sub_epi16(tr_nom_base, alphaAB);
dstAB = _mm_mullo_epi16(dstAB, nom);
dstAB = _mm_srli_epi16(dstAB, 8);
dstAB = _mm_packus_epi16(dstAB, dstAB);
(*dst).data = EXTR32(dstAB, 0);
}
break;
}
}
src_rgba_line = (const Colour*) ((const byte*) src_rgba_line + si->sprite_line_size);
dst_line += bp->pitch;
}
}
IGNORE_UNINITIALIZED_WARNING_STOP
/**
* Draws a sprite to a (screen) buffer. Calls adequate templated function.
*
* @param bp further blitting parameters
* @param mode blitter mode
* @param zoom zoom level at which we are drawing
*/
void Blitter_32bppSSE2::Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom)
{
switch (mode) {
case BM_NORMAL: {
const BlockType bt_last = (BlockType) (bp->width & 1);
if (bp->skip_left != 0 || bp->width <= MARGIN_NORMAL_THRESHOLD) {
switch (bt_last) {
case BT_EVEN: Draw<BM_NORMAL, RM_WITH_SKIP, BT_EVEN>(bp, zoom); return;
case BT_ODD: Draw<BM_NORMAL, RM_WITH_SKIP, BT_ODD>(bp, zoom); return;
default: NOT_REACHED();
}
} else {
switch (bt_last) {
case BT_EVEN: Draw<BM_NORMAL, RM_WITH_MARGIN, BT_EVEN>(bp, zoom); return;
case BT_ODD: Draw<BM_NORMAL, RM_WITH_MARGIN, BT_ODD>(bp, zoom); return;
default: NOT_REACHED();
}
}
break;
}
case BM_COLOUR_REMAP:
if (bp->skip_left != 0 || bp->width <= MARGIN_REMAP_THRESHOLD) {
Draw<BM_COLOUR_REMAP, RM_WITH_SKIP, BT_NONE>(bp, zoom); return;
} else {
Draw<BM_COLOUR_REMAP, RM_WITH_MARGIN, BT_NONE>(bp, zoom); return;
}
case BM_TRANSPARENT: Draw<BM_TRANSPARENT, RM_NONE, BT_NONE>(bp, zoom); return;
default: NOT_REACHED();
}
}
Sprite *Blitter_32bppSSE_Base::Encode(const SpriteLoader::Sprite *sprite, AllocatorProc *allocator)
{
/* First uint32 of a line = ~1 & the number of transparent pixels from the left.
* Second uint32 of a line = the number of transparent pixels from the right.
* Then all RGBA then all MV.
*/
ZoomLevel zoom_min = ZOOM_LVL_NORMAL;
ZoomLevel zoom_max = ZOOM_LVL_NORMAL;
if (sprite->type != ST_FONT) {
zoom_min = _settings_client.gui.zoom_min;
zoom_max = _settings_client.gui.zoom_max;
if (zoom_max == zoom_min) zoom_max = ZOOM_LVL_MAX;
}
/* Calculate sizes and allocate. */
SpriteData sd;
uint all_sprites_size = 0;
for (ZoomLevel z = zoom_min; z <= zoom_max; z++) {
const SpriteLoader::Sprite *src_sprite = &sprite[z];
sd.infos[z].sprite_width = src_sprite->width;
sd.infos[z].sprite_offset = all_sprites_size;
sd.infos[z].sprite_line_size = sizeof(Colour) * src_sprite->width + sizeof(uint32) * META_LENGTH;
const uint rgba_size = sd.infos[z].sprite_line_size * src_sprite->height;
sd.infos[z].mv_offset = all_sprites_size + rgba_size;
const uint mv_size = sizeof(MapValue) * src_sprite->width * src_sprite->height;
all_sprites_size += rgba_size + mv_size;
}
Sprite *dst_sprite = (Sprite *) allocator(sizeof(Sprite) + sizeof(SpriteData) + all_sprites_size);
dst_sprite->height = sprite->height;
dst_sprite->width = sprite->width;
dst_sprite->x_offs = sprite->x_offs;
dst_sprite->y_offs = sprite->y_offs;
memcpy(dst_sprite->data, &sd, sizeof(SpriteData));
/* Copy colours. */
for (ZoomLevel z = zoom_min; z <= zoom_max; z++) {
const SpriteLoader::Sprite *src_sprite = &sprite[z];
const SpriteLoader::CommonPixel *src = (const SpriteLoader::CommonPixel *) src_sprite->data;
Colour *dst_rgba_line = (Colour *) &dst_sprite->data[sizeof(SpriteData) + sd.infos[z].sprite_offset];
MapValue *dst_mv = (MapValue *) &dst_sprite->data[sizeof(SpriteData) + sd.infos[z].mv_offset];
for (uint y = src_sprite->height; y != 0; y--) {
Colour *dst_rgba = dst_rgba_line + META_LENGTH;
for (uint x = src_sprite->width; x != 0; x--) {
if (src->a != 0) {
dst_rgba->a = src->a;
dst_mv->m = src->m;
if (src->m != 0) {
/* Get brightest value (or default brightness if it's a black pixel). */
const uint8 rgb_max = max(src->r, max(src->g, src->b));
dst_mv->v = (rgb_max == 0) ? Blitter_32bppBase::DEFAULT_BRIGHTNESS : rgb_max;
/* Pre-convert the mapping channel to a RGB value. */
const Colour colour = AdjustBrightness(Blitter_32bppBase::LookupColourInPalette(src->m), dst_mv->v);
dst_rgba->r = colour.r;
dst_rgba->g = colour.g;
dst_rgba->b = colour.b;
} else {
dst_rgba->r = src->r;
dst_rgba->g = src->g;
dst_rgba->b = src->b;
dst_mv->v = Blitter_32bppBase::DEFAULT_BRIGHTNESS;
}
} else {
dst_rgba->data = 0;
*(uint16*) dst_mv = 0;
}
dst_rgba++;
dst_mv++;
src++;
}
/* Count the number of transparent pixels from the left. */
dst_rgba = dst_rgba_line + META_LENGTH;
uint32 nb_pix_transp = 0;
for (uint x = src_sprite->width; x != 0; x--) {
if (dst_rgba->a == 0) nb_pix_transp++;
else break;
dst_rgba++;
}
(*dst_rgba_line).data = nb_pix_transp & ~1; // "& ~1" to preserve the last block type
Colour *nb_right = dst_rgba_line + 1;
dst_rgba_line = (Colour*) ((byte*) dst_rgba_line + sd.infos[z].sprite_line_size);
/* Count the number of transparent pixels from the right. */
dst_rgba = dst_rgba_line - 1;
nb_pix_transp = 0;
for (uint x = src_sprite->width; x != 0; x--) {
if (dst_rgba->a == 0) nb_pix_transp++;
else break;
dst_rgba--;
}
(*nb_right).data = nb_pix_transp; // no "& ~1" here, must be done when we know bp->width
}
}
return dst_sprite;
}
/** ReallyAdjustBrightness() is not called that often.
* Inlining this function implies a far jump, which has a huge latency.
*/
inline Colour Blitter_32bppSSE2::AdjustBrightness(Colour colour, uint8 brightness)
{
/* Shortcut for normal brightness. */
if (brightness == DEFAULT_BRIGHTNESS) return colour;
return Blitter_32bppSSE2::ReallyAdjustBrightness(colour, brightness);
}
IGNORE_UNINITIALIZED_WARNING_START
/* static */ Colour Blitter_32bppSSE2::ReallyAdjustBrightness(Colour colour, uint8 brightness)
{
ALIGN(16) uint64 c16 = colour.b | (uint64) colour.g << 16 | (uint64) colour.r << 32;
c16 *= brightness;
uint64 c16_ob = c16; // Helps out of order execution.
c16 /= DEFAULT_BRIGHTNESS;
c16 &= 0x01FF01FF01FF;
/* Sum overbright (maximum for each rgb is 508, 9 bits, -255 is changed in -256 so we just have to take the 8 lower bits into account). */
c16_ob = (((c16_ob >> (8 + 7)) & 0x0100010001) * 0xFF) & c16;
uint64 ob = (uint16) c16_ob + (uint16) (c16_ob >> 16) + (uint16) (c16_ob >> 32);
const uint32 alpha32 = colour.data & 0xFF000000;
__m128i ret;
INSR64(c16, ret, 0);
if (ob != 0) {
/* Reduce overbright strength. */
ob /= 2;
__m128i ob128;
INSR64(ob | ob << 16 | ob << 32, ob128, 0);
__m128i white = OVERBRIGHT_VALUE_MASK;
__m128i c128 = ret;
ret = _mm_subs_epu16(white, c128); /* PSUBUSW, (255 - rgb) */
ret = _mm_mullo_epi16(ret, ob128); /* PMULLW, ob*(255 - rgb) */
ret = _mm_srli_epi16(ret, 8); /* PSRLW, ob*(255 - rgb)/256 */
ret = _mm_add_epi16(ret, c128); /* PADDW, ob*(255 - rgb)/256 + rgb */
}
ret = _mm_packus_epi16(ret, ret); /* PACKUSWB, saturate and pack. */
return alpha32 | EXTR32(ret, 0);
}
IGNORE_UNINITIALIZED_WARNING_STOP
#endif /* WITH_SSE */