1

/* $Id$ */

     2

     3

#include "../stdafx.h"

     4

#include "../gfx_func.h"

     5

#include "../zoom_func.h"

     6

#include "../debug.h"

     7

#include "32bpp_simple.hpp"

     8

     9

#include "../table/sprites.h"

    10

    11

static FBlitter_32bppSimple iFBlitter_32bppSimple;

    12

    13

void Blitter_32bppSimple::Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom)

    14

{

    15

	const SpriteLoader::CommonPixel *src, *src_line;

    16

	uint32 *dst, *dst_line;

    17

    18

	/* Find where to start reading in the source sprite */

    19

	src_line = (const SpriteLoader::CommonPixel *)bp->sprite + (bp->skip_top * bp->sprite_width + bp->skip_left) * ScaleByZoom(1, zoom);

    20

	dst_line = (uint32 *)bp->dst + bp->top * bp->pitch + bp->left;

    21

    22

	for (int y = 0; y < bp->height; y++) {

    23

		dst = dst_line;

    24

		dst_line += bp->pitch;

    25

    26

		src = src_line;

    27

		src_line += bp->sprite_width * ScaleByZoom(1, zoom);

    28

    29

		for (int x = 0; x < bp->width; x++) {

    30

			switch (mode) {

    31

				case BM_COLOUR_REMAP:

    32

					/* In case the m-channel is zero, do not remap this pixel in any way */

    33

					if (src->m == 0) {

    34

						if (src->a != 0) *dst = ComposeColourRGBA(src->r, src->g, src->b, src->a, *dst);

    35

					} else {

    36

						if (bp->remap[src->m] != 0) *dst = ComposeColourPA(this->LookupColourInPalette(bp->remap[src->m]), src->a, *dst);

    37

					}

    38

					break;

    39

    40

				case BM_TRANSPARENT:

    41

					/* TODO -- We make an assumption here that the remap in fact is transparency, not some color.

    42

					 *  This is never a problem with the code we produce, but newgrfs can make it fail... or at least:

    43

					 *  we produce a result the newgrf maker didn't expect ;) */

    44

    45

					/* Make the current color a bit more black, so it looks like this image is transparent */

    46

					if (src->a != 0) *dst = MakeTransparent(*dst, 192);

    47

					break;

    48

    49

				default:

    50

					if (src->a != 0) *dst = ComposeColourRGBA(src->r, src->g, src->b, src->a, *dst);

    51

					break;

    52

			}

    53

			dst++;

    54

			src += ScaleByZoom(1, zoom);

    55

		}

    56

	}

    57

}

    58

    59

void Blitter_32bppSimple::DrawColorMappingRect(void *dst, int width, int height, int pal)

    60

{

    61

	uint32 *udst = (uint32 *)dst;

    62

    63

	if (pal == PALETTE_TO_TRANSPARENT) {

    64

		do {

    65

			for (int i = 0; i != width; i++) {

    66

				*udst = MakeTransparent(*udst, 154);

    67

				udst++;

    68

			}

    69

			udst = udst - width + _screen.pitch;

    70

		} while (--height);

    71

		return;

    72

	}

    73

	if (pal == PALETTE_TO_STRUCT_GREY) {

    74

		do {

    75

			for (int i = 0; i != width; i++) {

    76

				*udst = MakeGrey(*udst);

    77

				udst++;

    78

			}

    79

			udst = udst - width + _screen.pitch;

    80

		} while (--height);

    81

		return;

    82

	}

    83

    84

	DEBUG(misc, 0, "32bpp blitter doesn't know how to draw this color table ('%d')", pal);

    85

}

    86

    87

Sprite *Blitter_32bppSimple::Encode(SpriteLoader::Sprite *sprite, Blitter::AllocatorProc *allocator)

    88

{

    89

	Sprite *dest_sprite;

    90

	SpriteLoader::CommonPixel *dst;

    91

	dest_sprite = (Sprite *)allocator(sizeof(*dest_sprite) + sprite->height * sprite->width * sizeof(SpriteLoader::CommonPixel));

    92

    93

	dest_sprite->height = sprite->height;

    94

	dest_sprite->width  = sprite->width;

    95

	dest_sprite->x_offs = sprite->x_offs;

    96

	dest_sprite->y_offs = sprite->y_offs;

    97

    98

	dst = (SpriteLoader::CommonPixel *)dest_sprite->data;

    99

   100

	memcpy(dst, sprite->data, sprite->height * sprite->width * sizeof(SpriteLoader::CommonPixel));

   101

	for (int i = 0; i < sprite->height * sprite->width; i++) {

   102

		if (dst[i].m != 0) {

   103

			/* Pre-convert the mapping channel to a RGB value */

   104

			uint color = this->LookupColourInPalette(dst[i].m);

   105

			dst[i].r = GB(color, 16, 8);

   106

			dst[i].g = GB(color, 8,  8);

   107

			dst[i].b = GB(color, 0,  8);

   108

		}

   109

	}

   110

   111

	return dest_sprite;

   112

}