00001
00002
00005 #include "../stdafx.h"
00006 #include "../gfx_func.h"
00007 #include "8bpp_base.hpp"
00008
00009 void Blitter_8bppBase::DrawColourMappingRect(void *dst, int width, int height, int pal)
00010 {
00011 const uint8 *ctab = GetNonSprite(pal, ST_RECOLOUR) + 1;
00012
00013 do {
00014 for (int i = 0; i != width; i++) *((uint8 *)dst + i) = ctab[((uint8 *)dst)[i]];
00015 dst = (uint8 *)dst + _screen.pitch;
00016 } while (--height);
00017 }
00018
00019 void *Blitter_8bppBase::MoveTo(const void *video, int x, int y)
00020 {
00021 return (uint8 *)video + x + y * _screen.pitch;
00022 }
00023
00024 void Blitter_8bppBase::SetPixel(void *video, int x, int y, uint8 colour)
00025 {
00026 *((uint8 *)video + x + y * _screen.pitch) = colour;
00027 }
00028
00029 void Blitter_8bppBase::SetPixelIfEmpty(void *video, int x, int y, uint8 colour)
00030 {
00031 uint8 *dst = (uint8 *)video + x + y * _screen.pitch;
00032 if (*dst == 0) *dst = colour;
00033 }
00034
00035 void Blitter_8bppBase::DrawRect(void *video, int width, int height, uint8 colour)
00036 {
00037 do {
00038 memset(video, colour, width);
00039 video = (uint8 *)video + _screen.pitch;
00040 } while (--height);
00041 }
00042
00043 void Blitter_8bppBase::DrawLine(void *video, int x, int y, int x2, int y2, int screen_width, int screen_height, uint8 colour)
00044 {
00045 int dy;
00046 int dx;
00047 int stepx;
00048 int stepy;
00049 int frac;
00050
00051 dy = (y2 - y) * 2;
00052 if (dy < 0) {
00053 dy = -dy;
00054 stepy = -1;
00055 } else {
00056 stepy = 1;
00057 }
00058
00059 dx = (x2 - x) * 2;
00060 if (dx < 0) {
00061 dx = -dx;
00062 stepx = -1;
00063 } else {
00064 stepx = 1;
00065 }
00066
00067 if (x >= 0 && y >= 0 && x < screen_width && y < screen_height) this->SetPixel(video, x, y, colour);
00068 if (dx > dy) {
00069 frac = dy - (dx / 2);
00070 while (x != x2) {
00071 if (frac >= 0) {
00072 y += stepy;
00073 frac -= dx;
00074 }
00075 x += stepx;
00076 frac += dy;
00077 if (x >= 0 && y >= 0 && x < screen_width && y < screen_height) this->SetPixel(video, x, y, colour);
00078 }
00079 } else {
00080 frac = dx - (dy / 2);
00081 while (y != y2) {
00082 if (frac >= 0) {
00083 x += stepx;
00084 frac -= dy;
00085 }
00086 y += stepy;
00087 frac += dx;
00088 if (x >= 0 && y >= 0 && x < screen_width && y < screen_height) this->SetPixel(video, x, y, colour);
00089 }
00090 }
00091 }
00092
00093 void Blitter_8bppBase::CopyFromBuffer(void *video, const void *src, int width, int height)
00094 {
00095 uint8 *dst = (uint8 *)video;
00096 uint8 *usrc = (uint8 *)src;
00097
00098 for (; height > 0; height--) {
00099 memcpy(dst, usrc, width * sizeof(uint8));
00100 usrc += width;
00101 dst += _screen.pitch;
00102 }
00103 }
00104
00105 void Blitter_8bppBase::CopyToBuffer(const void *video, void *dst, int width, int height)
00106 {
00107 uint8 *udst = (uint8 *)dst;
00108 uint8 *src = (uint8 *)video;
00109
00110 for (; height > 0; height--) {
00111 memcpy(udst, src, width * sizeof(uint8));
00112 src += _screen.pitch;
00113 udst += width;
00114 }
00115 }
00116
00117 void Blitter_8bppBase::CopyImageToBuffer(const void *video, void *dst, int width, int height, int dst_pitch)
00118 {
00119 uint8 *udst = (uint8 *)dst;
00120 uint8 *src = (uint8 *)video;
00121
00122 for (; height > 0; height--) {
00123 memcpy(udst, src, width * sizeof(uint8));
00124 src += _screen.pitch;
00125 udst += dst_pitch;
00126 }
00127 }
00128
00129 void Blitter_8bppBase::ScrollBuffer(void *video, int &left, int &top, int &width, int &height, int scroll_x, int scroll_y)
00130 {
00131 const uint8 *src;
00132 uint8 *dst;
00133
00134 if (scroll_y > 0) {
00135
00136 dst = (uint8 *)video + left + (top + height - 1) * _screen.pitch;
00137 src = dst - scroll_y * _screen.pitch;
00138
00139
00140 top += scroll_y;
00141 height -= scroll_y;
00142 assert(height > 0);
00143
00144
00145 if (scroll_x >= 0) {
00146 dst += scroll_x;
00147 left += scroll_x;
00148 width -= scroll_x;
00149 } else {
00150 src -= scroll_x;
00151 width += scroll_x;
00152 }
00153
00154 for (int h = height; h > 0; h--) {
00155 memcpy(dst, src, width * sizeof(uint8));
00156 src -= _screen.pitch;
00157 dst -= _screen.pitch;
00158 }
00159 } else {
00160
00161 dst = (uint8 *)video + left + top * _screen.pitch;
00162 src = dst - scroll_y * _screen.pitch;
00163
00164
00165 height += scroll_y;
00166 assert(height > 0);
00167
00168
00169 if (scroll_x >= 0) {
00170 dst += scroll_x;
00171 left += scroll_x;
00172 width -= scroll_x;
00173 } else {
00174 src -= scroll_x;
00175 width += scroll_x;
00176 }
00177
00178
00179
00180 for (int h = height; h > 0; h--) {
00181 memmove(dst, src, width * sizeof(uint8));
00182 src += _screen.pitch;
00183 dst += _screen.pitch;
00184 }
00185 }
00186 }
00187
00188 int Blitter_8bppBase::BufferSize(int width, int height)
00189 {
00190 return width * height;
00191 }
00192
00193 void Blitter_8bppBase::PaletteAnimate(uint start, uint count)
00194 {
00195
00196 }
00197
00198 Blitter::PaletteAnimation Blitter_8bppBase::UsePaletteAnimation()
00199 {
00200 return Blitter::PALETTE_ANIMATION_VIDEO_BACKEND;
00201 }