dxx-rebirth/common/2d/bitmap.cpp

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/*
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* Portions of this file are copyright Rebirth contributors and licensed as
* described in COPYING.txt.
* Portions of this file are copyright Parallax Software and licensed
* according to the Parallax license below.
* See COPYING.txt for license details.
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THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
SOFTWARE CORPORATION ("PARALLAX"). PARALLAX, IN DISTRIBUTING THE CODE TO
END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
IN USING, DISPLAYING, AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
FREE PURPOSES. IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES. THE END-USER UNDERSTANDS
AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
*/
/*
*
* Graphical routines for manipulating grs_bitmaps.
*
*/
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#include <algorithm>
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#include <stdexcept>
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#include <stdlib.h>
#include <stdio.h>
#include "u_mem.h"
#include "gr.h"
#include "grdef.h"
#include "dxxerror.h"
#if DXX_USE_OGL
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#include "ogl_init.h"
#endif
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#include "bitmap.h"
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#include "compiler-make_unique.h"
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namespace dcx {
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// Allocated a bitmap and makes its data be raw_data that is already somewhere.
static grs_bitmap_ptr gr_create_bitmap_raw(uint16_t w, uint16_t h, RAIIdmem<uint8_t[]> raw_data);
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void gr_set_bitmap_data(grs_bitmap &bm, const uint8_t *data)
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{
#if DXX_USE_OGL
ogl_freebmtexture(bm);
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#endif
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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{
RAIIdmem<uint8_t[]> d;
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MALLOC(d, unsigned char, MAX_BMP_SIZE(w, h));
return gr_create_bitmap_raw(w, h, std::move(d));
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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 = make_unique<grs_main_bitmap>();
gr_init_main_bitmap(*n.get(), bm_mode::linear, 0, 0, w, h, w, std::move(raw_data));
return n;
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}
// TODO: virtualize
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, const uint8_t *const data) noexcept
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{
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bm.bm_x = x;
bm.bm_y = y;
bm.bm_w = w;
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_data = data;
#if DXX_USE_OGL
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bm.bm_parent = nullptr;
bm.gltexture = nullptr;
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#endif
}
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)
{
bm.reset();
gr_init_bitmap(bm, mode, x, y, w, h, bytesperline, data.get());
data.release();
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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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{
RAIIdmem<uint8_t[]> d;
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MALLOC(d, unsigned char, MAX_BMP_SIZE(w, h));
gr_init_main_bitmap(bm, mode, x, y, w, h, bytesperline, std::move(d));
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}
grs_main_bitmap::grs_main_bitmap()
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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 = make_unique<grs_subbitmap>();
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gr_init_sub_bitmap(*n.get(), bm, x, y, w, h);
return n;
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}
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void gr_free_bitmap_data (grs_bitmap &bm) // TODO: virtulize
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{
if (auto &d = bm.bm_mdata)
d_free(d);
#if DXX_USE_OGL
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ogl_freebmtexture(bm);
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#endif
}
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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;
uint32_t suby = y + bmParent.bm_y;
if (subx != (bm.bm_x = static_cast<uint16_t>(subx)) ||
suby != (bm.bm_y = static_cast<uint16_t>(suby)))
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throw std::overflow_error("offset overflow");
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bm.bm_w = w;
bm.bm_h = h;
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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;
bm.bm_data = &bmParent.bm_data[static_cast<uint32_t>((y*bmParent.bm_rowsize)+x)];
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}
void decode_data(ubyte *data, uint_fast32_t num_pixels, array<color_t, 256> &colormap, array<bool, 256> &used)
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{
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const auto a = [&](uint8_t mapped) {
return used[mapped] = true, colormap[mapped];
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};
std::transform(data, data + num_pixels, data, a);
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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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}
void build_colormap_good(const palette_array_t &palette, array<color_t, 256> &colormap)
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{
const auto a = [](const rgb_t &p) {
return gr_find_closest_color(p.r, p.g, p.b);
};
std::transform(palette.begin(), palette.end(), colormap.begin(), a);
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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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array<uint8_t, 256> colormap;
build_colormap_good(palette, colormap);
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if (super_transparent_color < colormap.size())
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colormap[super_transparent_color] = 254;
if (transparent_color < colormap.size())
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colormap[transparent_color] = TRANSPARENCY_COLOR;
array<bool, 256> freq{};
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if (bmp.bm_w == bmp.bm_rowsize)
decode_data(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();
for (uint_fast32_t y = bmp.bm_h; y--; p += bmp.bm_rowsize)
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decode_data(p, bmp.bm_w, colormap, freq );
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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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}