mirror of https://github.com/OpenTTD/OpenTTD.git
448 lines
13 KiB
C++
448 lines
13 KiB
C++
/*
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* This file is part of OpenTTD.
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* 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.
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* 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.
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* 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/>.
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*/
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/** @file 32bpp_optimized.cpp Implementation of the optimized 32 bpp blitter. */
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#include "../stdafx.h"
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#include "../zoom_func.h"
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#include "../settings_type.h"
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#include "../palette_func.h"
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#include "32bpp_optimized.hpp"
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#include "../safeguards.h"
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/** Instantiation of the optimized 32bpp blitter factory. */
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static FBlitter_32bppOptimized iFBlitter_32bppOptimized;
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/**
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* Draws a sprite to a (screen) buffer. It is templated to allow faster operation.
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*
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* @tparam mode blitter mode
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* @param bp further blitting parameters
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* @param zoom zoom level at which we are drawing
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*/
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template <BlitterMode mode, bool Tpal_to_rgb>
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inline void Blitter_32bppOptimized::Draw(const Blitter::BlitterParams *bp, ZoomLevel zoom)
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{
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const SpriteData *src = (const SpriteData *)bp->sprite;
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/* src_px : each line begins with uint32_t n = 'number of bytes in this line',
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* then n times is the Colour struct for this line */
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const Colour *src_px = (const Colour *)(src->data + src->offset[zoom][0]);
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/* src_n : each line begins with uint32_t n = 'number of bytes in this line',
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* then interleaved stream of 'm' and 'n' channels. 'm' is remap,
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* 'n' is number of bytes with the same alpha channel class */
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const uint16_t *src_n = (const uint16_t *)(src->data + src->offset[zoom][1]);
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/* skip upper lines in src_px and src_n */
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for (uint i = bp->skip_top; i != 0; i--) {
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src_px = (const Colour *)((const uint8_t *)src_px + *(const uint32_t *)src_px);
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src_n = (const uint16_t *)((const uint8_t *)src_n + *(const uint32_t *)src_n);
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}
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/* skip lines in dst */
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Colour *dst = (Colour *)bp->dst + bp->top * bp->pitch + bp->left;
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/* store so we don't have to access it via bp every time (compiler assumes pointer aliasing) */
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const uint8_t *remap = bp->remap;
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for (int y = 0; y < bp->height; y++) {
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/* next dst line begins here */
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Colour *dst_ln = dst + bp->pitch;
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/* next src line begins here */
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const Colour *src_px_ln = (const Colour *)((const uint8_t *)src_px + *(const uint32_t *)src_px);
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src_px++;
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/* next src_n line begins here */
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const uint16_t *src_n_ln = (const uint16_t *)((const uint8_t *)src_n + *(const uint32_t *)src_n);
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src_n += 2;
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/* we will end this line when we reach this point */
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Colour *dst_end = dst + bp->skip_left;
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/* number of pixels with the same alpha channel class */
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uint n;
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while (dst < dst_end) {
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n = *src_n++;
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if (src_px->a == 0) {
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dst += n;
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src_px ++;
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src_n++;
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} else {
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if (dst + n > dst_end) {
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uint d = dst_end - dst;
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src_px += d;
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src_n += d;
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dst = dst_end - bp->skip_left;
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dst_end = dst + bp->width;
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n = std::min(n - d, (uint)bp->width);
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goto draw;
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}
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dst += n;
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src_px += n;
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src_n += n;
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}
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}
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dst -= bp->skip_left;
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dst_end -= bp->skip_left;
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dst_end += bp->width;
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while (dst < dst_end) {
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n = std::min<uint>(*src_n++, dst_end - dst);
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if (src_px->a == 0) {
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dst += n;
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src_px++;
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src_n++;
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continue;
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}
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draw:;
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switch (mode) {
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case BM_COLOUR_REMAP:
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if (src_px->a == 255) {
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do {
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uint m = *src_n;
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/* In case the m-channel is zero, do not remap this pixel in any way */
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if (m == 0) {
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*dst = src_px->data;
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} else {
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uint r = remap[GB(m, 0, 8)];
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if (r != 0) *dst = this->AdjustBrightness(this->LookupColourInPalette(r), GB(m, 8, 8));
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}
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dst++;
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src_px++;
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src_n++;
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} while (--n != 0);
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} else {
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do {
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uint m = *src_n;
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if (m == 0) {
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*dst = ComposeColourRGBANoCheck(src_px->r, src_px->g, src_px->b, src_px->a, *dst);
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} else {
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uint r = remap[GB(m, 0, 8)];
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if (r != 0) *dst = ComposeColourPANoCheck(this->AdjustBrightness(this->LookupColourInPalette(r), GB(m, 8, 8)), src_px->a, *dst);
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}
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dst++;
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src_px++;
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src_n++;
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} while (--n != 0);
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}
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break;
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case BM_CRASH_REMAP:
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if (src_px->a == 255) {
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do {
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uint m = *src_n;
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if (m == 0) {
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uint8_t g = MakeDark(src_px->r, src_px->g, src_px->b);
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*dst = ComposeColourRGBA(g, g, g, src_px->a, *dst);
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} else {
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uint r = remap[GB(m, 0, 8)];
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if (r != 0) *dst = this->AdjustBrightness(this->LookupColourInPalette(r), GB(m, 8, 8));
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}
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dst++;
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src_px++;
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src_n++;
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} while (--n != 0);
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} else {
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do {
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uint m = *src_n;
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if (m == 0) {
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if (src_px->a != 0) {
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uint8_t g = MakeDark(src_px->r, src_px->g, src_px->b);
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*dst = ComposeColourRGBA(g, g, g, src_px->a, *dst);
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}
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} else {
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uint r = remap[GB(m, 0, 8)];
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if (r != 0) *dst = ComposeColourPANoCheck(this->AdjustBrightness(this->LookupColourInPalette(r), GB(m, 8, 8)), src_px->a, *dst);
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}
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dst++;
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src_px++;
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src_n++;
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} while (--n != 0);
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}
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break;
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case BM_BLACK_REMAP:
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do {
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*dst = Colour(0, 0, 0);
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dst++;
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src_px++;
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src_n++;
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} while (--n != 0);
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break;
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case BM_TRANSPARENT:
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/* Make the current colour a bit more black, so it looks like this image is transparent */
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src_n += n;
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if (src_px->a == 255) {
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src_px += n;
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do {
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*dst = MakeTransparent(*dst, 3, 4);
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dst++;
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} while (--n != 0);
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} else {
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do {
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*dst = MakeTransparent(*dst, (256 * 4 - src_px->a), 256 * 4);
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dst++;
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src_px++;
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} while (--n != 0);
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}
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break;
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case BM_TRANSPARENT_REMAP:
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/* Apply custom transparency remap. */
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src_n += n;
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if (src_px->a != 0) {
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src_px += n;
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do {
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*dst = this->LookupColourInPalette(remap[GetNearestColourIndex(*dst)]);
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dst++;
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} while (--n != 0);
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} else {
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dst += n;
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src_px += n;
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}
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break;
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default:
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if (src_px->a == 255) {
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/* faster than memcpy(), n is usually low */
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do {
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if (Tpal_to_rgb && *src_n != 0) {
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/* Convert the mapping channel to a RGB value */
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*dst = this->AdjustBrightness(this->LookupColourInPalette(GB(*src_n, 0, 8)), GB(*src_n, 8, 8)).data;
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} else {
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*dst = src_px->data;
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}
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dst++;
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src_px++;
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src_n++;
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} while (--n != 0);
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} else {
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do {
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if (Tpal_to_rgb && *src_n != 0) {
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/* Convert the mapping channel to a RGB value */
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Colour colour = this->AdjustBrightness(this->LookupColourInPalette(GB(*src_n, 0, 8)), GB(*src_n, 8, 8));
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*dst = ComposeColourRGBANoCheck(colour.r, colour.g, colour.b, src_px->a, *dst);
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} else {
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*dst = ComposeColourRGBANoCheck(src_px->r, src_px->g, src_px->b, src_px->a, *dst);
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}
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dst++;
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src_px++;
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src_n++;
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} while (--n != 0);
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}
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break;
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}
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}
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dst = dst_ln;
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src_px = src_px_ln;
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src_n = src_n_ln;
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}
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}
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template <bool Tpal_to_rgb>
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void Blitter_32bppOptimized::Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom)
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{
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switch (mode) {
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default: NOT_REACHED();
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case BM_NORMAL: Draw<BM_NORMAL, Tpal_to_rgb>(bp, zoom); return;
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case BM_COLOUR_REMAP: Draw<BM_COLOUR_REMAP, Tpal_to_rgb>(bp, zoom); return;
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case BM_TRANSPARENT: Draw<BM_TRANSPARENT, Tpal_to_rgb>(bp, zoom); return;
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case BM_TRANSPARENT_REMAP: Draw<BM_TRANSPARENT_REMAP, Tpal_to_rgb>(bp, zoom); return;
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case BM_CRASH_REMAP: Draw<BM_CRASH_REMAP, Tpal_to_rgb>(bp, zoom); return;
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case BM_BLACK_REMAP: Draw<BM_BLACK_REMAP, Tpal_to_rgb>(bp, zoom); return;
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}
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}
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template void Blitter_32bppOptimized::Draw<true>(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom);
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template void Blitter_32bppOptimized::Draw<false>(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom);
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/**
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* Draws a sprite to a (screen) buffer. Calls adequate templated function.
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*
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* @param bp further blitting parameters
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* @param mode blitter mode
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* @param zoom zoom level at which we are drawing
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*/
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void Blitter_32bppOptimized::Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom)
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{
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this->Draw<false>(bp, mode, zoom);
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}
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template <bool Tpal_to_rgb> Sprite *Blitter_32bppOptimized::EncodeInternal(const SpriteLoader::SpriteCollection &sprite, AllocatorProc *allocator)
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{
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/* streams of pixels (a, r, g, b channels)
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*
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* stored in separated stream so data are always aligned on 4B boundary */
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Colour *dst_px_orig[ZOOM_LVL_END];
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/* interleaved stream of 'm' channel and 'n' channel
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* 'n' is number of following pixels with the same alpha channel class
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* there are 3 classes: 0, 255, others
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*
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* it has to be stored in one stream so fewer registers are used -
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* x86 has problems with register allocation even with this solution */
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uint16_t *dst_n_orig[ZOOM_LVL_END];
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/* lengths of streams */
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uint32_t lengths[ZOOM_LVL_END][2];
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ZoomLevel zoom_min;
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ZoomLevel zoom_max;
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if (sprite[ZOOM_LVL_NORMAL].type == SpriteType::Font) {
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zoom_min = ZOOM_LVL_NORMAL;
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zoom_max = ZOOM_LVL_NORMAL;
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} else {
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zoom_min = _settings_client.gui.zoom_min;
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zoom_max = _settings_client.gui.zoom_max;
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if (zoom_max == zoom_min) zoom_max = ZOOM_LVL_MAX;
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}
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for (ZoomLevel z = zoom_min; z <= zoom_max; z++) {
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const SpriteLoader::Sprite *src_orig = &sprite[z];
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uint size = src_orig->height * src_orig->width;
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dst_px_orig[z] = CallocT<Colour>(size + src_orig->height * 2);
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dst_n_orig[z] = CallocT<uint16_t>(size * 2 + src_orig->height * 4 * 2);
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uint32_t *dst_px_ln = (uint32_t *)dst_px_orig[z];
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uint32_t *dst_n_ln = (uint32_t *)dst_n_orig[z];
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const SpriteLoader::CommonPixel *src = (const SpriteLoader::CommonPixel *)src_orig->data;
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for (uint y = src_orig->height; y > 0; y--) {
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/* Index 0 of dst_px and dst_n is left as space to save the length of the row to be filled later. */
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Colour *dst_px = (Colour *)&dst_px_ln[1];
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uint16_t *dst_n = (uint16_t *)&dst_n_ln[1];
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uint16_t *dst_len = dst_n++;
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uint last = 3;
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int len = 0;
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for (uint x = src_orig->width; x > 0; x--) {
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uint8_t a = src->a;
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uint t = a > 0 && a < 255 ? 1 : a;
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if (last != t || len == 65535) {
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if (last != 3) {
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*dst_len = len;
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dst_len = dst_n++;
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}
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len = 0;
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}
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last = t;
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len++;
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if (a != 0) {
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dst_px->a = a;
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*dst_n = src->m;
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if (src->m != 0) {
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/* Get brightest value */
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uint8_t rgb_max = std::max({ src->r, src->g, src->b });
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/* Black pixel (8bpp or old 32bpp image), so use default value */
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if (rgb_max == 0) rgb_max = DEFAULT_BRIGHTNESS;
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*dst_n |= rgb_max << 8;
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if (Tpal_to_rgb) {
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/* Pre-convert the mapping channel to a RGB value */
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Colour colour = this->AdjustBrightness(this->LookupColourInPalette(src->m), rgb_max);
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dst_px->r = colour.r;
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dst_px->g = colour.g;
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dst_px->b = colour.b;
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} else {
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dst_px->r = src->r;
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dst_px->g = src->g;
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dst_px->b = src->b;
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}
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} else {
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dst_px->r = src->r;
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dst_px->g = src->g;
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dst_px->b = src->b;
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}
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dst_px++;
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dst_n++;
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} else if (len == 1) {
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dst_px++;
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*dst_n = src->m;
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dst_n++;
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}
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src++;
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}
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if (last != 3) {
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*dst_len = len;
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}
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dst_px = (Colour *)AlignPtr(dst_px, 4);
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dst_n = (uint16_t *)AlignPtr(dst_n, 4);
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*dst_px_ln = (uint8_t *)dst_px - (uint8_t *)dst_px_ln;
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*dst_n_ln = (uint8_t *)dst_n - (uint8_t *)dst_n_ln;
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dst_px_ln = (uint32_t *)dst_px;
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dst_n_ln = (uint32_t *)dst_n;
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}
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lengths[z][0] = (uint8_t *)dst_px_ln - (uint8_t *)dst_px_orig[z]; // all are aligned to 4B boundary
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lengths[z][1] = (uint8_t *)dst_n_ln - (uint8_t *)dst_n_orig[z];
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}
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uint len = 0; // total length of data
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for (ZoomLevel z = zoom_min; z <= zoom_max; z++) {
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len += lengths[z][0] + lengths[z][1];
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}
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Sprite *dest_sprite = (Sprite *)allocator(sizeof(*dest_sprite) + sizeof(SpriteData) + len);
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dest_sprite->height = sprite[ZOOM_LVL_NORMAL].height;
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dest_sprite->width = sprite[ZOOM_LVL_NORMAL].width;
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dest_sprite->x_offs = sprite[ZOOM_LVL_NORMAL].x_offs;
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dest_sprite->y_offs = sprite[ZOOM_LVL_NORMAL].y_offs;
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SpriteData *dst = (SpriteData *)dest_sprite->data;
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memset(dst, 0, sizeof(*dst));
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for (ZoomLevel z = zoom_min; z <= zoom_max; z++) {
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dst->offset[z][0] = z == zoom_min ? 0 : lengths[z - 1][1] + dst->offset[z - 1][1];
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dst->offset[z][1] = lengths[z][0] + dst->offset[z][0];
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memcpy(dst->data + dst->offset[z][0], dst_px_orig[z], lengths[z][0]);
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memcpy(dst->data + dst->offset[z][1], dst_n_orig[z], lengths[z][1]);
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free(dst_px_orig[z]);
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free(dst_n_orig[z]);
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}
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return dest_sprite;
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}
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template Sprite *Blitter_32bppOptimized::EncodeInternal<true>(const SpriteLoader::SpriteCollection &sprite, AllocatorProc *allocator);
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template Sprite *Blitter_32bppOptimized::EncodeInternal<false>(const SpriteLoader::SpriteCollection &sprite, AllocatorProc *allocator);
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Sprite *Blitter_32bppOptimized::Encode(const SpriteLoader::SpriteCollection &sprite, AllocatorProc *allocator)
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{
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return this->EncodeInternal<true>(sprite, allocator);
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}
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