Vendor raptor source files (was embedded gitlink)

Tree vendored at upstream 0019c5dd; origin + license recorded in
raptor/VENDOR.txt. Windows SDL dev packages excluded via .gitignore.

raptor/src/shadow.cpp

@@ -0,0 +1,236 @@
+#include <stdint.h>
+#include "common.h"
+#include "gfxapi.h"
+#include "rap.h"
+#include "windows.h"
+#include "glbapi.h"
+#include "entypes.h"
+
+char sdtablemem[516];
+char *sdtable;
+
+typedef struct 
+{
+    int item;
+    int x;
+    int y;
+}SHADOW;
+
+#define MAX_SHADOWS 50
+#define MAX_GSHADOWS 25
+
+SHADOW shads[MAX_SHADOWS];
+SHADOW gshads[MAX_GSHADOWS];
+int num_shadows, num_gshadows;
+
+#define MAXZ  1280;
+
+/***************************************************************************
+SHADOW_Draw () - Draws AIR shadows in 3D perspective
+ ***************************************************************************/
+void 
+SHADOW_Draw(
+    char *pic,             // INPUT : pointer to sprite data
+    int x,                 // INPUT : x position of sprite
+    int y                  // INPUT : y position of sprite
+)
+{
+    GFX_PIC *h = (GFX_PIC*)pic;
+    GFX_SPRITE *ah;
+    int lx, ly, oldsy, sx, sy, ox, oy, x2, y2, oldy, drawflag;
+
+    x -= 10;
+    y += 20;
+    
+    oldy = oldsy = -1;
+    
+    G3D_x = x;
+    G3D_y = y;
+    G3D_z = MAXZ;
+    GFX_3DPoint();
+    ox = G3D_screenx;
+    oy = G3D_screeny;
+    
+    G3D_x = ox + LE_LONG(h->width) - 1;
+    G3D_y = oy + LE_LONG(h->height) - 1;
+    G3D_z = MAXZ;
+    GFX_3DPoint();
+    lx = G3D_screenx - ox + 1;
+    ly = G3D_screenx - oy + 1;
+    
+    if (!GFX_ClipLines(0, &ox, &oy, &lx, &ly))
+        return;
+    
+    pic += sizeof(GFX_PIC);
+    
+    ah = (GFX_SPRITE*)pic;
+    
+    while (LE_LONG(ah->offset) != -1)
+    {
+        pic += sizeof(GFX_SPRITE);
+        
+        ox = LE_LONG(ah->x) + x;
+        oy = LE_LONG(ah->y) + y;
+        
+        x2 = ox + LE_LONG(ah->length) - 1;
+        y2 = oy + 1;
+        
+        G3D_x = ox;
+        G3D_y = oy;
+        G3D_z = MAXZ;
+        GFX_3DPoint();
+        sx = G3D_screenx;
+        sy = G3D_screeny;
+        
+        G3D_x = x2;
+        G3D_y = y2;
+        G3D_z = MAXZ;
+        GFX_3DPoint();
+        lx = G3D_screenx - sx + 1;
+        
+        if (sy > SCREENHEIGHT)
+            return;
+        
+        drawflag = 1;
+        
+        if (LE_LONG(ah->y) != oldy && oldsy == sy)
+            drawflag = 0;
+        
+        if (drawflag)
+        {
+            ly = 1;
+            
+            if (GFX_ClipLines(0, &sx, &sy, &lx, &ly))
+                GFX_Shade(displaybuffer + sx + ylookup[sy], lx, sdtable);
+            
+            oldy = LE_LONG(ah->y);
+        }
+        
+        oldsy = sy;
+        
+        pic += LE_LONG(ah->length);
+        
+        ah = (GFX_SPRITE*)pic;
+    }
+}
+
+/***************************************************************************
+SHADOW_Init() - Allocate memory and set 3D view
+ ***************************************************************************/
+void 
+SHADOW_Init(
+    void
+)
+{
+    sdtable = sdtablemem;
+    sdtable = (char*)(((intptr_t)sdtable + 255) & ~255);
+    
+    GFX_3D_SetView(160, 100, 1000);
+}
+
+/***************************************************************************
+SHADOW_MakeShades() - Make shade tables
+ ***************************************************************************/
+void 
+SHADOW_MakeShades(
+    void
+)
+{
+    GFX_MakeLightTable(palette, sdtable, -6);
+}
+
+/***************************************************************************
+SHADOW_Add() - Add a Air ship shadow
+ ***************************************************************************/
+void 
+SHADOW_Add(
+    int item,               // INPUT : GLB item
+    int x,                  // INPUT : x position
+    int y                   // INPUT : y position
+)
+{
+    SHADOW *cur;
+    cur = &shads[num_shadows];
+    
+    if (num_shadows < MAX_SHADOWS)
+    {
+        cur->item = item;
+        cur->x = x;
+        cur->y = y;
+        
+        num_shadows++;
+    }
+}
+
+/***************************************************************************
+SHADOW_GAdd() - Adds Ground shadow
+ ***************************************************************************/
+void 
+SHADOW_GAdd(
+    int item,              // INPUT : GLB item
+    int x,                 // INPUT : x position
+    int y                  // INPUT : y position
+)
+{
+    SHADOW *cur;
+    cur = &gshads[num_gshadows];
+    
+    if (num_gshadows < MAX_GSHADOWS)
+    {
+        cur->item = item;
+        cur->x = x - 3;
+        cur->y = y + 4;
+        
+        num_gshadows++;
+    }
+}
+
+/***************************************************************************
+SHADOW_DisplaySky () - Display Sky Shadows
+ ***************************************************************************/
+void 
+SHADOW_DisplaySky(
+    void
+)
+{
+    char *pic;
+    SHADOW *cur;
+    cur = shads;
+    
+    if (opt_detail < 1)
+        return;
+    
+    while (--num_shadows != -1)
+    {
+        pic = GLB_GetItem(cur->item);
+        SHADOW_Draw(pic, cur->x, cur->y);
+        cur++;
+    }
+    
+    num_shadows = 0;
+}
+
+/***************************************************************************
+SHADOW_DisplayGround() - Display Ground Shadows
+ ***************************************************************************/
+void 
+SHADOW_DisplayGround(
+    void
+)
+{
+    char *pic;
+    SHADOW *cur;
+    cur = gshads;
+    
+    if (opt_detail < 1)
+        return;
+    
+    while (--num_gshadows != -1)
+    {
+        pic = GLB_GetItem(cur->item);
+        GFX_ShadeShape(DARK, (char*)pic, cur->x, cur->y);
+        cur++;
+    }
+    
+    num_gshadows = 0;
+}