202 lines
6 KiB
C++
202 lines
6 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 1993-1998 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
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*/
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/*
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*
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* Graphical routines for manipulating grs_bitmaps.
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*
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*/
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#include <algorithm>
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#include <stdexcept>
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#include <stdlib.h>
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#include <stdio.h>
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#include "u_mem.h"
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#include "gr.h"
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#include "dxxerror.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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#include "bitmap.h"
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#include <memory>
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namespace dcx {
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namespace {
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// Allocated a bitmap and makes its data be raw_data that is already somewhere.
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static grs_bitmap_ptr gr_create_bitmap_raw(uint16_t w, uint16_t h, RAIIdmem<uint8_t[]> raw_data);
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}
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void gr_set_bitmap_data(grs_bitmap &bm, const uint8_t *data)
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{
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#if DXX_USE_OGL
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ogl_freebmtexture(bm);
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#endif
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bm.bm_data = data;
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}
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grs_bitmap_ptr gr_create_bitmap(uint16_t w, uint16_t h )
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{
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RAIIdmem<uint8_t[]> d;
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MALLOC(d, uint8_t[], MAX_BMP_SIZE(w, h));
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return gr_create_bitmap_raw(w, h, std::move(d));
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}
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namespace {
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grs_bitmap_ptr gr_create_bitmap_raw(const uint16_t w, const uint16_t h, RAIIdmem<uint8_t[]> raw_data)
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{
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auto n = std::make_unique<grs_main_bitmap>();
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gr_init_main_bitmap(*n.get(), bm_mode::linear, 0, 0, w, h, w, std::move(raw_data));
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return n;
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}
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}
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// TODO: virtualize
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void gr_init_bitmap(grs_bitmap &bm, const bm_mode mode, const uint16_t x, const uint16_t y, const uint16_t w, const uint16_t h, const uint16_t bytesperline, color_palette_index *const mdata) noexcept
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{
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bm.bm_x = x;
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bm.bm_y = y;
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bm.bm_w = w;
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bm.bm_h = h;
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bm.set_flags(0);
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bm.set_type(mode);
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bm.bm_rowsize = bytesperline;
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bm.bm_mdata = mdata;
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#if DXX_USE_OGL
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bm.bm_parent = nullptr;
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bm.gltexture = nullptr;
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#endif
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}
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void gr_init_main_bitmap(grs_main_bitmap &bm, const bm_mode mode, const uint16_t x, const uint16_t y, const uint16_t w, const uint16_t h, const uint16_t bytesperline, RAIIdmem<uint8_t[]> data)
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{
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bm.reset();
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gr_init_bitmap(bm, mode, x, y, w, h, bytesperline, data.get());
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data.release();
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}
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void gr_init_bitmap_alloc(grs_main_bitmap &bm, const bm_mode mode, const uint16_t x, const uint16_t y, const uint16_t w, const uint16_t h, const uint16_t bytesperline)
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{
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RAIIdmem<uint8_t[]> d;
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MALLOC(d, uint8_t[], MAX_BMP_SIZE(w, h));
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gr_init_main_bitmap(bm, mode, x, y, w, h, bytesperline, std::move(d));
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}
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grs_main_bitmap::grs_main_bitmap()
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{
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static_cast<grs_bitmap &>(*this) = {};
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}
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grs_subbitmap_ptr gr_create_sub_bitmap(grs_bitmap &bm, uint16_t x, uint16_t y, uint16_t w, uint16_t h)
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{
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auto n = std::make_unique<grs_subbitmap>();
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gr_init_sub_bitmap(*n.get(), bm, x, y, w, h);
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return n;
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}
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void gr_free_bitmap_data (grs_bitmap &bm) // TODO: virtulize
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{
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if (auto &d = bm.bm_mdata)
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d_free(d);
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#if DXX_USE_OGL
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ogl_freebmtexture(bm);
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#endif
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}
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void gr_init_sub_bitmap (grs_bitmap &bm, grs_bitmap &bmParent, uint16_t x, uint16_t y, uint16_t w, uint16_t h ) // TODO: virtualize
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{
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uint32_t subx = x + bmParent.bm_x;
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uint32_t suby = y + bmParent.bm_y;
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if (subx != (bm.bm_x = static_cast<uint16_t>(subx)) ||
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suby != (bm.bm_y = static_cast<uint16_t>(suby)))
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throw std::overflow_error("offset overflow");
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if (x > bmParent.bm_w ||
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y > bmParent.bm_h)
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throw std::overflow_error("offset beyond parent dimensions");
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bm.bm_w = std::min<uint16_t>(w, bmParent.bm_w - x);
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bm.bm_h = std::min<uint16_t>(h, bmParent.bm_h - y);
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bm.set_flags(bmParent.get_flags());
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bm.set_type(bmParent.get_type());
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bm.bm_rowsize = bmParent.bm_rowsize;
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#if DXX_USE_OGL
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bm.gltexture = bmParent.gltexture;
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#endif
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bm.bm_parent = &bmParent;
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bm.bm_data = &bmParent.bm_data[static_cast<uint32_t>((y*bmParent.bm_rowsize)+x)];
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}
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void decode_data(const std::span<color_palette_index> data, const std::array<color_palette_index, 256> &colormap, std::bitset<256> &used)
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{
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const auto a = [&](uint8_t mapped) {
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return used[mapped] = true, colormap[mapped];
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};
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std::transform(data.begin(), data.end(), data.begin(), a);
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}
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namespace {
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static void gr_set_super_transparent(grs_bitmap &bm, bool bOpaque)
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{
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bm.set_flag_mask(!bOpaque, BM_FLAG_SUPER_TRANSPARENT);
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}
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}
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void build_colormap_good(const palette_array_t &palette, std::array<color_palette_index, 256> &colormap)
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{
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const auto a = [](const rgb_t &p) {
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return gr_find_closest_color(p.r, p.g, p.b);
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};
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std::transform(palette.begin(), palette.end(), colormap.begin(), a);
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}
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void gr_remap_bitmap_good(grs_bitmap &bmp, palette_array_t &palette, uint_fast32_t transparent_color, uint_fast32_t super_transparent_color)
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{
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std::array<color_palette_index, 256> colormap;
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build_colormap_good(palette, colormap);
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if (super_transparent_color < colormap.size())
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colormap[super_transparent_color] = color_palette_index{254};
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if (transparent_color < colormap.size())
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colormap[transparent_color] = TRANSPARENCY_COLOR;
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std::bitset<256> freq{};
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if (bmp.bm_w == bmp.bm_rowsize)
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decode_data(std::span(bmp.get_bitmap_data(), bmp.bm_w * bmp.bm_h), colormap, freq);
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else {
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auto p = bmp.get_bitmap_data();
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for (uint_fast32_t y = bmp.bm_h; y--; p += bmp.bm_rowsize)
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decode_data(std::span{p, bmp.bm_w}, colormap, freq);
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}
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if (transparent_color < freq.size() && freq[transparent_color])
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gr_set_transparent(bmp, 1);
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if (super_transparent_color < freq.size() && freq[super_transparent_color])
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gr_set_super_transparent(bmp, 1);
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}
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}
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