A simple OutRun on Casio Graph 90+E
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OutRun/src/src/drawstuff.cc

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2.9 KiB

#include "../include/drawstuff.h"
#include "../parameters.h"
#include <gint/display.h>
#include <gint/dma.h>
#include "../fixed.h"
extern uint8_t minYRoad;
void gint_dhline(int x1, int x2, int y, uint16_t color)
{
if((uint)y >= 224) return;
if(x1 > x2) swap(x1, x2);
if(x1 >= 396 || x2 < 0) return;
if(x1 < 0) x1 = 0;
if(x2 >= 396) x2 = 395;
int offset = 396 * y;
gint_vram[offset + x1] = color;
gint_vram[offset + x2] = color;
x1 = x1 + (x1 & 1);
x2 = (x2 + 1) & ~1;
uint32_t *start = (void *)(gint_vram + offset + x1);
uint32_t *end = (void *)(gint_vram + offset + x2);
uint32_t op = (color << 16) | color;
while(end > start) *--end = op;
};
void drawGrass( int y1, int y2, uint8_t R, uint8_t G, uint8_t B )
{
uint16_t color = C_RGB(R,G,B);
for (int y=y1; y<=y2; y++) gint_dhline( 0, SCREEN_WIDTH, y, color );
};
void drawGrass( int y1, int y2, uint16_t color )
{
for (int y=y1; y<=y2; y++) gint_dhline( 0, SCREEN_WIDTH, y, color );
};
void drawPolygon( int x1min, int x1max, int y1, int x2min, int x2max, int y2, uint8_t R, uint8_t G, uint8_t B )
{
uint16_t color = C_RGB(R,G,B);
if (y1==y2)
{
gint_dhline( x1min, x1max, y1, color );
return;
}
fixed_t deltay = fdiv(fix(1), fix(y2-y1));
fixed_t xmin = fix(x1min);
fixed_t xmax = fix(x1max);
fixed_t dxmin = fix(x2min-x1min);
fixed_t dxmax = fix(x2max-x1max);
for (int y=y1; y<=y2; y++)
{
if (y>0 && y<SCREEN_HEIGHT)
{
xmin += fmul(deltay, dxmin);
xmax += fmul(deltay, dxmax);
gint_dhline( fround(xmin), fround(xmax), y, color );
}
//deltay+=Ddeltay;
}
};
void drawPolygon( int x1min, int x1max, int y1, int x2min, int x2max, int y2, uint16_t color )
{
if (y1==y2)
{
gint_dhline( x1min, x1max, y1, color );
return;
}
fixed_t deltay = fdiv(fix(1), fix(y2-y1));
fixed_t xmin = fix(x1min);
fixed_t xmax = fix(x1max);
fixed_t dxmin = fix(x2min-x1min);
fixed_t dxmax = fix(x2max-x1max);
for (int y=y1; y<=y2; y++)
{
if (y>0 && y<SCREEN_HEIGHT)
{
xmin += fmul(deltay, dxmin);
xmax += fmul(deltay, dxmax);
gint_dhline( fround(xmin), fround(xmax), y, color );
}
}
};
void drawSkyFull( uint16_t color )
{
//dclear( color );
dma_memset(gint_vram, (color << 16) | color, 396 * 174 * 2);
};
void drawSky( uint16_t color )
{
dma_memset(gint_vram, (color << 16) | color, 396 * 110 * 2);
};
void drawSkyOptimised( uint16_t color )
{
dma_memset(gint_vram, (color << 16) | color, 396 * (minYRoad+10) * 2);
};
void drawSky( uint8_t R, uint8_t G, uint8_t B )
{
dclear( C_RGB(R,G,B) );
};
void drawSky( int ymin, int ymax )
{
uint16_t color = C_RGB(0,45,255);
for(int y=ymin; y<=ymax; y++ )
gint_dhline( 0, SCREEN_WIDTH, y, color );
};