diff options
Diffstat (limited to 'src/blitter/32bpp_base.cpp')
-rw-r--r-- | src/blitter/32bpp_base.cpp | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/src/blitter/32bpp_base.cpp b/src/blitter/32bpp_base.cpp new file mode 100644 index 000000000..a3211a02a --- /dev/null +++ b/src/blitter/32bpp_base.cpp @@ -0,0 +1,125 @@ +#include "../stdafx.h" +#include "../gfx.h" +#include "32bpp_base.hpp" + +void *Blitter_32bppBase::MoveTo(const void *video, int x, int y) +{ + return (uint32 *)video + x + y * _screen.pitch; +} + +void Blitter_32bppBase::SetPixel(void *video, int x, int y, uint8 color) +{ + *((uint32 *)video + x + y * _screen.pitch) = LookupColourInPalette(color); +} + +void Blitter_32bppBase::SetPixelIfEmpty(void *video, int x, int y, uint8 color) +{ + uint32 *dst = (uint32 *)video + x + y * _screen.pitch; + if (*dst == 0) *dst = LookupColourInPalette(color); +} + +void Blitter_32bppBase::SetHorizontalLine(void *video, int width, uint8 color) +{ + uint32 *dst = (uint32 *)video; + uint32 color32 = LookupColourInPalette(color); + + for (; width > 0; width--) { + *dst = color32; + dst++; + } +} + +void Blitter_32bppBase::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 >> 1); + while (x != x2) { + if (frac >= 0) { + y += stepy; + frac -= dx; + } + x += stepx; + frac += dy; + this->SetPixel(video, x, y, color); + } + } else { + frac = dx - (dy >> 1); + while (y != y2) { + if (frac >= 0) { + x += stepx; + frac -= dy; + } + y += stepy; + frac += dx; + this->SetPixel(video, x, y, color); + } + } +} + +void Blitter_32bppBase::CopyFromBuffer(void *video, const void *src, int width, int height, int src_pitch) +{ + int direction = (height < 0) ? -1 : 1; + uint32 *dst = (uint32 *)video; + uint32 *usrc = (uint32 *)src; + + height = abs(height); + for (; height > 0; height--) { + memcpy(dst, usrc, width * sizeof(uint32)); + usrc += src_pitch * direction; + dst += _screen.pitch * direction; + } +} + +void Blitter_32bppBase::CopyToBuffer(const void *video, void *dst, int width, int height, int dst_pitch) +{ + int direction = (height < 0) ? -1 : 1; + uint32 *udst = (uint32 *)dst; + uint32 *src = (uint32 *)video; + + height = abs(height); + for (; height > 0; height--) { + memcpy(udst, src, width * sizeof(uint32)); + src += _screen.pitch * direction; + udst += dst_pitch * direction; + } +} + +void Blitter_32bppBase::MoveBuffer(void *video_dst, const void *video_src, int width, int height) +{ + uint32 *dst = (uint32 *)video_dst; + uint32 *src = (uint32 *)video_src; + + for (; height > 0; height--) { + memmove(dst, src, width * sizeof(uint32)); + src += _screen.pitch; + dst += _screen.pitch; + } +} + +int Blitter_32bppBase::BufferSize(int width, int height) +{ + return width * height * sizeof(uint32); +} |