275 lines
8.5 KiB
C++
275 lines
8.5 KiB
C++
/*
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* Portions of this file are copyright Rebirth contributors and licensed as
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* described in COPYING.txt.
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* Portions of this file are copyright Parallax Software and licensed
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* according to the Parallax license below.
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* See COPYING.txt for license details.
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THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
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SOFTWARE CORPORATION ("PARALLAX"). PARALLAX, IN DISTRIBUTING THE CODE TO
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END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
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ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
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IN USING, DISPLAYING, AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
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SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
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FREE PURPOSES. IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
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CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES. THE END-USER UNDERSTANDS
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AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
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COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
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*/
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/*
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*
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* Routines to cache merged textures.
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*
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*/
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#include "gr.h"
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#include "dxxerror.h"
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#include "fmtcheck.h"
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#include "textures.h"
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#include "rle.h"
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#include "timer.h"
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#include "piggy.h"
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#include "segment.h"
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#include "texmerge.h"
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#include "piggy.h"
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#include "compiler-range_for.h"
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#include "partial_range.h"
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#if DXX_USE_OGL
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#include "ogl_init.h"
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#endif
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#define MAX_NUM_CACHE_BITMAPS 10
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//static grs_bitmap * cache_bitmaps[MAX_NUM_CACHE_BITMAPS];
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namespace {
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struct TEXTURE_CACHE {
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grs_bitmap_ptr bitmap;
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grs_bitmap * bottom_bmp;
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grs_bitmap * top_bmp;
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texture2_rotation_high orient;
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fix64 last_time_used;
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};
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/* Helper classes merge_texture_0 through merge_texture_3 correspond to
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* the four values of `orient` used by texmerge_get_cached_bitmap.
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*/
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struct merge_texture_0
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{
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static size_t get_top_data_index(const unsigned wh, const unsigned y, const unsigned x)
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{
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return wh * y + x;
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}
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};
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struct merge_texture_1
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{
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static size_t get_top_data_index(const unsigned wh, const unsigned y, const unsigned x)
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{
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return wh * x + ((wh - 1) - y);
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}
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};
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struct merge_texture_2
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{
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static size_t get_top_data_index(const unsigned wh, const unsigned y, const unsigned x)
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{
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return wh * ((wh - 1) - y) + ((wh - 1) - x);
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}
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};
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struct merge_texture_3
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{
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static size_t get_top_data_index(const unsigned wh, const unsigned y, const unsigned x)
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{
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return wh * ((wh - 1) - x) + y;
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}
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};
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/* For supertransparent colors, remap 254.
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* For regular transparent colors, do nothing.
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*
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* In both cases, the caller remaps TRANSPARENCY_COLOR to the bottom
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* bitmap.
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*/
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struct merge_transform_super_xparent
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{
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static uint8_t transform_color(uint8_t c)
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{
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return c == 254 ? TRANSPARENCY_COLOR : c;
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}
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};
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struct merge_transform_new
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{
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static uint8_t transform_color(uint8_t c)
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{
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return c;
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}
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};
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}
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/* Run the transform for one texture merge case. Different values of
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* `orient` in texmerge_get_cached_bitmap lead to different types for
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* `get_index`.
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*/
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template <typename texture_transform, typename get_index>
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static void merge_textures_case(const unsigned wh, const uint8_t *const top_data, const uint8_t *const bottom_data, uint8_t *dest_data)
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{
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for (unsigned y = 0; y < wh; ++y)
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for (unsigned x = 0; x < wh; ++x)
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{
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const auto c = top_data[get_index::get_top_data_index(wh, y, x)];
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/* All merged textures support TRANSPARENCY_COLOR, so handle
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* it here. Supertransparency is delegated down to
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* `texture_transform`, since not all textures want
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* supertransparency.
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*/
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*dest_data++ = (c == TRANSPARENCY_COLOR)
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? bottom_data[wh * y + x]
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: texture_transform::transform_color(c);
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}
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}
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/* Dispatch a texture transformation based on the value of `orient`.
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* The loops are duplicated in each case so that `orient` is not reread
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* for each byte processed.
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*/
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template <typename texture_transform>
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static void merge_textures(const texture2_rotation_high orient, const grs_bitmap &expanded_bottom_bmp, const grs_bitmap &expanded_top_bmp, uint8_t *const dest_data)
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{
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const auto &top_data = expanded_top_bmp.bm_data;
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const auto &bottom_data = expanded_bottom_bmp.bm_data;
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const auto wh = expanded_bottom_bmp.bm_w;
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switch (orient)
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{
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case texture2_rotation_high::Normal:
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merge_textures_case<texture_transform, merge_texture_0>(wh, top_data, bottom_data, dest_data);
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break;
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case texture2_rotation_high::_1:
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merge_textures_case<texture_transform, merge_texture_1>(wh, top_data, bottom_data, dest_data);
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break;
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case texture2_rotation_high::_2:
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merge_textures_case<texture_transform, merge_texture_2>(wh, top_data, bottom_data, dest_data);
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break;
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case texture2_rotation_high::_3:
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merge_textures_case<texture_transform, merge_texture_3>(wh, top_data, bottom_data, dest_data);
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break;
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}
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}
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static std::array<TEXTURE_CACHE, MAX_NUM_CACHE_BITMAPS> Cache;
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static int cache_hits = 0;
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static int cache_misses = 0;
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//----------------------------------------------------------------------
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int texmerge_init()
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{
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range_for (auto &i, Cache)
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{
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i.bitmap = NULL;
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i.last_time_used = -1;
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i.top_bmp = NULL;
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i.bottom_bmp = NULL;
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}
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return 1;
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}
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void texmerge_flush()
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{
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range_for (auto &i, Cache)
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{
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i.last_time_used = -1;
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i.top_bmp = NULL;
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i.bottom_bmp = NULL;
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}
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}
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//-------------------------------------------------------------------------
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void texmerge_close()
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{
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range_for (auto &i, Cache)
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{
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i.bitmap.reset();
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}
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}
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//--unused-- int info_printed = 0;
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grs_bitmap &texmerge_get_cached_bitmap(const texture1_value tmap_bottom, const texture2_value tmap_top)
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{
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grs_bitmap *bitmap_top, *bitmap_bottom;
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int lowest_time_used;
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auto &texture_top = Textures[get_texture_index(tmap_top)];
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bitmap_top = &GameBitmaps[texture_top.index];
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auto &texture_bottom = Textures[get_texture_index(tmap_bottom)];
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bitmap_bottom = &GameBitmaps[texture_bottom.index];
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const auto orient = get_texture_rotation_high(tmap_top);
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lowest_time_used = Cache[0].last_time_used;
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auto least_recently_used = &Cache.front();
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range_for (auto &i, Cache)
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{
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if ( (i.last_time_used > -1) && (i.top_bmp==bitmap_top) && (i.bottom_bmp==bitmap_bottom) && (i.orient==orient )) {
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cache_hits++;
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i.last_time_used = timer_query();
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return *i.bitmap.get();
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}
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if ( i.last_time_used < lowest_time_used ) {
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lowest_time_used = i.last_time_used;
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least_recently_used = &i;
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}
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}
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//---- Page out the LRU bitmap;
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cache_misses++;
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// Make sure the bitmaps are paged in...
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PIGGY_PAGE_IN(texture_top);
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PIGGY_PAGE_IN(texture_bottom);
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if (bitmap_bottom->bm_w != bitmap_bottom->bm_h || bitmap_top->bm_w != bitmap_top->bm_h)
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Error("Texture width != texture height!\nbottom tmap = %u; bottom bitmap = %u; bottom width = %u; bottom height = %u\ntop tmap = %hu; top bitmap = %u; top width=%u; top height=%u", static_cast<uint16_t>(tmap_bottom), texture_bottom.index, bitmap_bottom->bm_w, bitmap_bottom->bm_h, static_cast<uint16_t>(tmap_top), texture_top.index, bitmap_top->bm_w, bitmap_top->bm_h);
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if (bitmap_bottom->bm_w != bitmap_top->bm_w || bitmap_bottom->bm_h != bitmap_top->bm_h)
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Error("Top and Bottom textures have different size!\nbottom tmap = %u; bottom bitmap = %u; bottom width = %u; bottom height = %u\ntop tmap = %hu; top bitmap = %u; top width=%u; top height=%u", static_cast<uint16_t>(tmap_bottom), texture_bottom.index, bitmap_bottom->bm_w, bitmap_bottom->bm_h, static_cast<uint16_t>(tmap_top), texture_top.index, bitmap_top->bm_w, bitmap_top->bm_h);
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least_recently_used->bitmap = gr_create_bitmap(bitmap_bottom->bm_w, bitmap_bottom->bm_h);
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#if DXX_USE_OGL
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ogl_freebmtexture(*least_recently_used->bitmap.get());
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#endif
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auto &expanded_top_bmp = *rle_expand_texture(*bitmap_top);
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auto &expanded_bottom_bmp = *rle_expand_texture(*bitmap_bottom);
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if (bitmap_top->get_flag_mask(BM_FLAG_SUPER_TRANSPARENT))
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{
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merge_textures<merge_transform_super_xparent>(orient, expanded_bottom_bmp, expanded_top_bmp, least_recently_used->bitmap->get_bitmap_data());
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gr_set_bitmap_flags(*least_recently_used->bitmap.get(), BM_FLAG_TRANSPARENT);
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#if !DXX_USE_OGL
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least_recently_used->bitmap->avg_color = bitmap_top->avg_color;
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#endif
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} else {
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merge_textures<merge_transform_new>(orient, expanded_bottom_bmp, expanded_top_bmp, least_recently_used->bitmap->get_bitmap_data());
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least_recently_used->bitmap->set_flags(bitmap_bottom->get_flag_mask(~BM_FLAG_RLE));
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#if !DXX_USE_OGL
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least_recently_used->bitmap->avg_color = bitmap_bottom->avg_color;
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#endif
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}
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least_recently_used->top_bmp = bitmap_top;
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least_recently_used->bottom_bmp = bitmap_bottom;
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least_recently_used->last_time_used = timer_query();
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least_recently_used->orient = orient;
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return *least_recently_used->bitmap.get();
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}
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