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#include "../stdafx.h"
#include "../gfx.h"
#include "8bpp_base.hpp"
void Blitter_8bppBase::DrawColorMappingRect(void *dst, int width, int height, int pal)
{
const uint8 *ctab = GetNonSprite(pal) + 1;
do {
for (int i = 0; i != width; i++) *((uint8 *)dst + i) = ctab[((uint8 *)dst)[i]];
dst = (uint8 *)dst + _screen.pitch;
} while (height--);
}
void *Blitter_8bppBase::MoveTo(const void *video, int x, int y)
{
return (uint8 *)video + x + y * _screen.pitch;
}
void Blitter_8bppBase::SetPixel(void *video, int x, int y, uint8 color)
{
*((uint8 *)video + x + y * _screen.pitch) = color;
}
void Blitter_8bppBase::SetPixelIfEmpty(void *video, int x, int y, uint8 color)
{
uint8 *dst = (uint8 *)video + x + y * _screen.pitch;
if (*dst == 0) *dst = color;
}
void Blitter_8bppBase::SetHorizontalLine(void *video, int width, uint8 color)
{
memset(video, color, width);
}
void Blitter_8bppBase::DrawLine(void *video, int x, int y, int x2, int y2, uint8 color)
{
int dy;
int dx;
int stepx;
int stepy;
int frac;
dy = (y2 - y) * 2;
if (dy < 0) {
dy = -dy;
stepy = -1;
} else {
stepy = 1;
}
dx = (x2 - x) * 2;
if (dx < 0) {
dx = -dx;
stepx = -1;
} else {
stepx = 1;
}
this->SetPixel(video, x, y, color);
if (dx > dy) {
frac = dy - (dx / 2);
while (x != x2) {
if (frac >= 0) {
y += stepy;
frac -= dx;
}
x += stepx;
frac += dy;
this->SetPixel(video, x, y, color);
}
} else {
frac = dx - (dy / 2);
while (y != y2) {
if (frac >= 0) {
x += stepx;
frac -= dy;
}
y += stepy;
frac += dx;
this->SetPixel(video, x, y, color);
}
}
}
void Blitter_8bppBase::CopyFromBuffer(void *video, const void *src, int width, int height, int src_pitch)
{
int direction = (height < 0) ? -1 : 1;
uint8 *dst = (uint8 *)video;
uint8 *usrc = (uint8 *)src;
height = abs(height);
for (; height > 0; height--) {
memcpy(dst, usrc, width);
usrc += src_pitch * direction;
dst += _screen.pitch * direction;
}
}
void Blitter_8bppBase::CopyToBuffer(const void *video, void *dst, int width, int height, int dst_pitch)
{
int direction = (height < 0) ? -1 : 1;
uint8 *udst = (uint8 *)dst;
uint8 *src = (uint8 *)video;
height = abs(height);
for (; height > 0; height--) {
memcpy(udst, src, width);
src += _screen.pitch * direction;
udst += dst_pitch * direction;
}
}
void Blitter_8bppBase::MoveBuffer(void *video_dst, const void *video_src, int width, int height)
{
uint8 *dst = (uint8 *)video_dst;
uint8 *src = (uint8 *)video_src;
for (; height > 0; height--) {
memmove(dst, src, width);
src += _screen.pitch;
dst += _screen.pitch;
}
}
int Blitter_8bppBase::BufferSize(int width, int height)
{
return width * height;
}
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