author | truelight |
Sun, 17 Jun 2007 20:30:28 +0000 | |
changeset 7433 | 8e410e7ec0d7 |
child 7436 | 5a81fc22ff30 |
permissions | -rw-r--r-- |
7433
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#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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} |