OpenTTD Source: src/blitter/32bpp_simple.cpp Source File

OpenTTD Source 12.2

32bpp_simple.cpp
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1 /*
2 * This file is part of OpenTTD.
3 * 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.
4 * 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.
5 * 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/>.
6 */
7
10 #include "../stdafx.h"
11 #include "../zoom_func.h"
12 #include "32bpp_simple.hpp"
13
14 #include "../table/sprites.h"
15
16 #include "../safeguards.h"
17
19 static FBlitter_32bppSimple iFBlitter_32bppSimple;
20
21 void Blitter_32bppSimple::Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom)
22 {
23 const Blitter_32bppSimple::Pixel *src, *src_line;
24 Colour *dst, *dst_line;
25
26 /* Find where to start reading in the source sprite */
27 src_line = (const Blitter_32bppSimple::Pixel *)bp->sprite + (bp->skip_top * bp->sprite_width + bp->skip_left) * ScaleByZoom(1, zoom);
28 dst_line = (Colour *)bp->dst + bp->top * bp->pitch + bp->left;
29
30 for (int y = 0; y < bp->height; y++) {
31 dst = dst_line;
32 dst_line += bp->pitch;
33
34 src = src_line;
35 src_line += bp->sprite_width * ScaleByZoom(1, zoom);
36
37 for (int x = 0; x < bp->width; x++) {
38 switch (mode) {
39 case BM_COLOUR_REMAP:
40 /* In case the m-channel is zero, do not remap this pixel in any way */
41 if (src->m == 0) {
42 if (src->a != 0) *dst = ComposeColourRGBA(src->r, src->g, src->b, src->a, *dst);
43 } else {
44 if (bp->remap[src->m] != 0) *dst = ComposeColourPA(this->AdjustBrightness(this->LookupColourInPalette(bp->remap[src->m]), src->v), src->a, *dst);
45 }
46 break;
47
48 case BM_CRASH_REMAP:
49 if (src->m == 0) {
50 if (src->a != 0) {
51 uint8 g = MakeDark(src->r, src->g, src->b);
52 *dst = ComposeColourRGBA(g, g, g, src->a, *dst);
53 }
54 } else {
55 if (bp->remap[src->m] != 0) *dst = ComposeColourPA(this->AdjustBrightness(this->LookupColourInPalette(bp->remap[src->m]), src->v), src->a, *dst);
56 }
57 break;
58
59 case BM_BLACK_REMAP:
60 if (src->a != 0) {
61 *dst = Colour(0, 0, 0);
62 }
63 break;
64
65 case BM_TRANSPARENT:
66 /* TODO -- We make an assumption here that the remap in fact is transparency, not some colour.
67 * This is never a problem with the code we produce, but newgrfs can make it fail... or at least:
68 * we produce a result the newgrf maker didn't expect ;) */
69
70 /* Make the current colour a bit more black, so it looks like this image is transparent */
71 if (src->a != 0) *dst = MakeTransparent(*dst, 192);
72 break;
73
74 default:
75 if (src->a != 0) *dst = ComposeColourRGBA(src->r, src->g, src->b, src->a, *dst);
76 break;
77 }
78 dst++;
79 src += ScaleByZoom(1, zoom);
80 }
81 }
82 }
83
84 void Blitter_32bppSimple::DrawColourMappingRect(void *dst, int width, int height, PaletteID pal)
85 {
86 Colour *udst = (Colour *)dst;
87
88 if (pal == PALETTE_TO_TRANSPARENT) {
89 do {
90 for (int i = 0; i != width; i++) {
91 *udst = MakeTransparent(*udst, 154);
92 udst++;
93 }
94 udst = udst - width + _screen.pitch;
95 } while (--height);
96 return;
97 }
98 if (pal == PALETTE_NEWSPAPER) {
99 do {
100 for (int i = 0; i != width; i++) {
101 *udst = MakeGrey(*udst);
102 udst++;
103 }
104 udst = udst - width + _screen.pitch;
105 } while (--height);
106 return;
107 }
108
109 Debug(misc, 0, "32bpp blitter doesn't know how to draw this colour table ('{}')", pal);
110 }
111
112 Sprite *Blitter_32bppSimple::Encode(const SpriteLoader::Sprite *sprite, AllocatorProc *allocator)
113 {
114 Blitter_32bppSimple::Pixel *dst;
115 Sprite *dest_sprite = (Sprite *)allocator(sizeof(*dest_sprite) + (size_t)sprite->height * (size_t)sprite->width * sizeof(*dst));
116
117 dest_sprite->height = sprite->height;
118 dest_sprite->width = sprite->width;
119 dest_sprite->x_offs = sprite->x_offs;
120 dest_sprite->y_offs = sprite->y_offs;
121
122 dst = (Blitter_32bppSimple::Pixel *)dest_sprite->data;
123 SpriteLoader::CommonPixel *src = (SpriteLoader::CommonPixel *)sprite->data;
124
125 for (int i = 0; i < sprite->height * sprite->width; i++) {
126 if (src->m == 0) {
127 dst[i].r = src->r;
128 dst[i].g = src->g;
129 dst[i].b = src->b;
130 dst[i].a = src->a;
131 dst[i].m = 0;
132 dst[i].v = 0;
133 } else {
134 /* Get brightest value */
135 uint8 rgb_max = std::max({src->r, src->g, src->b});
136
137 /* Black pixel (8bpp or old 32bpp image), so use default value */
138 if (rgb_max == 0) rgb_max = DEFAULT_BRIGHTNESS;
139 dst[i].v = rgb_max;
140
141 /* Pre-convert the mapping channel to a RGB value */
142 Colour colour = this->AdjustBrightness(this->LookupColourInPalette(src->m), dst[i].v);
143 dst[i].r = colour.r;
144 dst[i].g = colour.g;
145 dst[i].b = colour.b;
146 dst[i].a = src->a;
147 dst[i].m = src->m;
148 }
149 src++;
150 }
151
152 return dest_sprite;
153 }
Blitter::BlitterParams::top
int top
The top offset in the 'dst' in pixels to start drawing.
Definition: base.hpp:42
BM_TRANSPARENT
@ BM_TRANSPARENT
Perform transparency colour remapping.
Definition: base.hpp:20
Blitter::BlitterParams::skip_left
int skip_left
How much pixels of the source to skip on the left (based on zoom of dst)
Definition: base.hpp:35
BlitterMode
BlitterMode
The modes of blitting we can do.
Definition: base.hpp:17
Blitter::BlitterParams::width
int width
The width in pixels that needs to be drawn to dst.
Definition: base.hpp:37
Sprite::data
byte data[]
Sprite data.
Definition: spritecache.h:22
Blitter_32bppSimple::Pixel
Definition: 32bpp_simple.hpp:18
Blitter::BlitterParams::dst
void * dst
Destination buffer.
Definition: base.hpp:44
PALETTE_TO_TRANSPARENT
static const PaletteID PALETTE_TO_TRANSPARENT
This sets the sprite to transparent.
Definition: sprites.h:1597
Sprite::height
uint16 height
Height of the sprite.
Definition: spritecache.h:18
Sprite::x_offs
int16 x_offs
Number of pixels to shift the sprite to the right.
Definition: spritecache.h:20
Blitter::BlitterParams::sprite_width
int sprite_width
Real width of the sprite.
Definition: base.hpp:39
ZoomLevel
ZoomLevel
All zoom levels we know.
Definition: zoom_type.h:21
Blitter::BlitterParams::pitch
int pitch
The pitch of the destination buffer.
Definition: base.hpp:45
Blitter_32bppSimple::Encode
Sprite * Encode(const SpriteLoader::Sprite *sprite, AllocatorProc *allocator) override
Convert a sprite from the loader to our own format.
Definition: 32bpp_simple.cpp:112
Blitter_32bppSimple::Pixel::b
uint8 b
Blue-channel.
Definition: 32bpp_simple.hpp:21
SpriteLoader::Sprite::data
SpriteLoader::CommonPixel * data
The sprite itself.
Definition: spriteloader.hpp:55
Blitter::BlitterParams::sprite
const void * sprite
Pointer to the sprite how ever the encoder stored it.
Definition: base.hpp:32
Blitter_32bppSimple::Pixel::m
uint8 m
Remap-channel.
Definition: 32bpp_simple.hpp:23
Blitter_32bppBase::MakeGrey
static Colour MakeGrey(Colour colour)
Make a colour grey - based.
Definition: 32bpp_base.hpp:144
32bpp_simple.hpp
BM_COLOUR_REMAP
@ BM_COLOUR_REMAP
Perform a colour remapping.
Definition: base.hpp:19
SpriteLoader::CommonPixel
Definition of a common pixel in OpenTTD's realm.
Definition: spriteloader.hpp:34
Blitter_32bppSimple::Pixel::g
uint8 g
Green-channel.
Definition: 32bpp_simple.hpp:20
PALETTE_NEWSPAPER
static const PaletteID PALETTE_NEWSPAPER
Recolour sprite for newspaper-greying.
Definition: sprites.h:1599
BM_CRASH_REMAP
@ BM_CRASH_REMAP
Perform a crash remapping.
Definition: base.hpp:21
Blitter_32bppBase::ComposeColourPA
static Colour ComposeColourPA(Colour colour, uint a, Colour current)
Compose a colour based on Pixel value, alpha value, and the current pixel value.
Definition: 32bpp_base.hpp:87
Sprite::width
uint16 width
Width of the sprite.
Definition: spritecache.h:19
Blitter_32bppBase::LookupColourInPalette
static Colour LookupColourInPalette(uint index)
Look up the colour in the current palette.
Definition: 32bpp_base.hpp:38
Blitter_32bppSimple::DrawColourMappingRect
void DrawColourMappingRect(void *dst, int width, int height, PaletteID pal) override
Draw a colourtable to the screen.
Definition: 32bpp_simple.cpp:84
SpriteLoader::Sprite::x_offs
int16 x_offs
The x-offset of where the sprite will be drawn.
Definition: spriteloader.hpp:51
BM_BLACK_REMAP
@ BM_BLACK_REMAP
Perform remapping to a completely blackened sprite.
Definition: base.hpp:22
Blitter_32bppBase::MakeDark
static uint8 MakeDark(uint8 r, uint8 g, uint8 b)
Make a colour dark grey, for specialized 32bpp remapping.
Definition: 32bpp_base.hpp:121
Colour
Structure to access the alpha, red, green, and blue channels from a 32 bit number.
Definition: gfx_type.h:163
Blitter_32bppBase::ComposeColourRGBA
static Colour ComposeColourRGBA(uint r, uint g, uint b, uint a, Colour current)
Compose a colour based on RGBA values and the current pixel value.
Definition: 32bpp_base.hpp:63
Blitter_32bppSimple::Pixel::a
uint8 a
Alpha-channel.
Definition: 32bpp_simple.hpp:22
SpriteLoader::Sprite::width
uint16 width
Width of the sprite.
Definition: spriteloader.hpp:50
ScaleByZoom
static int ScaleByZoom(int value, ZoomLevel zoom)
Scale by zoom level, usually shift left (when zoom > ZOOM_LVL_NORMAL) When shifting right,...
Definition: zoom_func.h:22
Blitter_32bppSimple::Pixel::r
uint8 r
Red-channel.
Definition: 32bpp_simple.hpp:19
iFBlitter_32bppSimple
static FBlitter_32bppSimple iFBlitter_32bppSimple
Instantiation of the simple 32bpp blitter factory.
Definition: 32bpp_simple.cpp:19
PaletteID
uint32 PaletteID
The number of the palette.
Definition: gfx_type.h:18
Blitter::BlitterParams::left
int left
The left offset in the 'dst' in pixels to start drawing.
Definition: base.hpp:41
Blitter_32bppSimple::Pixel::v
uint8 v
Brightness-channel.
Definition: 32bpp_simple.hpp:24
Sprite::y_offs
int16 y_offs
Number of pixels to shift the sprite downwards.
Definition: spritecache.h:21
SpriteLoader::Sprite
Structure for passing information from the sprite loader to the blitter.
Definition: spriteloader.hpp:48
Blitter_32bppBase::MakeTransparent
static Colour MakeTransparent(Colour colour, uint nom, uint denom=256)
Make a pixel looks like it is transparent.
Definition: 32bpp_base.hpp:105
Debug
#define Debug(name, level, format_string,...)
Ouptut a line of debugging information.
Definition: debug.h:37
Blitter::BlitterParams
Parameters related to blitting.
Definition: base.hpp:31
Blitter_32bppSimple::Draw
void Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom) override
Draw an image to the screen, given an amount of params defined above.
Definition: 32bpp_simple.cpp:21
Blitter::BlitterParams::height
int height
The height in pixels that needs to be drawn to dst.
Definition: base.hpp:38
SpriteLoader::Sprite::y_offs
int16 y_offs
The y-offset of where the sprite will be drawn.
Definition: spriteloader.hpp:52
SpriteLoader::Sprite::height
uint16 height
Height of the sprite.
Definition: spriteloader.hpp:49
Blitter::BlitterParams::skip_top
int skip_top
How much pixels of the source to skip on the top (based on zoom of dst)
Definition: base.hpp:36
Sprite
Data structure describing a sprite.
Definition: spritecache.h:17
Blitter::BlitterParams::remap
const byte * remap
XXX – Temporary storage for remap array.
Definition: base.hpp:33
FBlitter_32bppSimple
Factory for the simple 32 bpp blitter.
Definition: 32bpp_simple.hpp:35