mirror of
https://github.com/OpenTTD/OpenTTD
synced 2026-01-19 18:32:35 +01:00
003375d375
-Codechange: introduced a hierachy of blitters to avoid a lot of code duplication Note: this allows much easier adding other types of video-drivers, like OpenGL
126 lines
2.6 KiB
C++
126 lines
2.6 KiB
C++
#include "../stdafx.h"
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#include "../gfx.h"
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#include "32bpp_base.hpp"
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void *Blitter_32bppBase::MoveTo(const void *video, int x, int y)
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{
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return (uint32 *)video + x + y * _screen.pitch;
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}
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void Blitter_32bppBase::SetPixel(void *video, int x, int y, uint8 color)
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{
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*((uint32 *)video + x + y * _screen.pitch) = LookupColourInPalette(color);
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}
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void Blitter_32bppBase::SetPixelIfEmpty(void *video, int x, int y, uint8 color)
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{
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uint32 *dst = (uint32 *)video + x + y * _screen.pitch;
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if (*dst == 0) *dst = LookupColourInPalette(color);
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}
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void Blitter_32bppBase::SetHorizontalLine(void *video, int width, uint8 color)
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{
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uint32 *dst = (uint32 *)video;
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uint32 color32 = LookupColourInPalette(color);
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for (; width > 0; width--) {
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*dst = color32;
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dst++;
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}
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}
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void Blitter_32bppBase::DrawLine(void *video, int x, int y, int x2, int y2, uint8 color)
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{
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int dy;
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int dx;
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int stepx;
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int stepy;
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int frac;
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dy = (y2 - y) * 2;
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if (dy < 0) {
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dy = -dy;
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stepy = -1;
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} else {
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stepy = 1;
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}
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dx = (x2 - x) * 2;
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if (dx < 0) {
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dx = -dx;
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stepx = -1;
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} else {
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stepx = 1;
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}
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this->SetPixel(video, x, y, color);
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if (dx > dy) {
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frac = dy - (dx >> 1);
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while (x != x2) {
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if (frac >= 0) {
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y += stepy;
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frac -= dx;
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}
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x += stepx;
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frac += dy;
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this->SetPixel(video, x, y, color);
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}
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} else {
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frac = dx - (dy >> 1);
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while (y != y2) {
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if (frac >= 0) {
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x += stepx;
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frac -= dy;
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}
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y += stepy;
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frac += dx;
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this->SetPixel(video, x, y, color);
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}
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}
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}
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void Blitter_32bppBase::CopyFromBuffer(void *video, const void *src, int width, int height, int src_pitch)
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{
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int direction = (height < 0) ? -1 : 1;
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uint32 *dst = (uint32 *)video;
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uint32 *usrc = (uint32 *)src;
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height = abs(height);
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for (; height > 0; height--) {
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memcpy(dst, usrc, width * sizeof(uint32));
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usrc += src_pitch * direction;
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dst += _screen.pitch * direction;
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}
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}
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void Blitter_32bppBase::CopyToBuffer(const void *video, void *dst, int width, int height, int dst_pitch)
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{
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int direction = (height < 0) ? -1 : 1;
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uint32 *udst = (uint32 *)dst;
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uint32 *src = (uint32 *)video;
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height = abs(height);
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for (; height > 0; height--) {
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memcpy(udst, src, width * sizeof(uint32));
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src += _screen.pitch * direction;
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udst += dst_pitch * direction;
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}
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}
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void Blitter_32bppBase::MoveBuffer(void *video_dst, const void *video_src, int width, int height)
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{
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uint32 *dst = (uint32 *)video_dst;
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uint32 *src = (uint32 *)video_src;
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for (; height > 0; height--) {
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memmove(dst, src, width * sizeof(uint32));
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src += _screen.pitch;
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dst += _screen.pitch;
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}
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}
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int Blitter_32bppBase::BufferSize(int width, int height)
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{
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return width * height * sizeof(uint32);
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}
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