From f02db00ad4f41b4d098557a63461f6c5766c3273 Mon Sep 17 00:00:00 2001
From: Ludovic Pouzenc <lpouzenc@gmail.com>
Date: Thu, 18 Jul 2013 00:15:47 +0200
Subject: Debut paintTerrain() import depuis code de 2010

---
 src/graphic.c         | 107 ++++++++++++++++++++++++++++++++++++++++++++++++++
 src/include/graphic.h |   6 ++-
 2 files changed, 112 insertions(+), 1 deletion(-)

diff --git a/src/graphic.c b/src/graphic.c
index dbdb55c..b1844a3 100644
--- a/src/graphic.c
+++ b/src/graphic.c
@@ -80,3 +80,110 @@ void my_SDL_init_or_die(char title[], SDL_Rect win_pos, Uint32 init_flags, Uint3
 	SDL_RenderGetViewport(*rend, viewport);
 }
 
+//FIXME : to be implmented
+#if 0
+int paintTerrain(gameIni_t *gIni, gameRess_t *gRess, gameGraphics_t *gGraph) {
+	int res, i, modifier;
+	int x,y,xmin,xmax,ymin,ymax,y2,xdst,ydst;
+	Uint32 dstPixel, dstStencil;
+	SDL_Surface *tile;
+
+	gGraph->surfaces.terrain=createSurface(LEVEL_WIDTH, LEVEL_HEIGHT);
+	if (gGraph->surfaces.terrain==NULL) {
+		logs(LOG_ERROR, "paintTerrain(), SDL_CreateRGBSurface() returns NULL");
+		return 1;
+	}
+	gGraph->surfaces.stencil=createSurface(LEVEL_WIDTH, LEVEL_HEIGHT);
+	if (gGraph->surfaces.stencil==NULL) {
+		logs(LOG_ERROR, "paintTerrain(), SDL_CreateRGBSurface() returns NULL");
+		return 2;
+	}
+
+	res=SDL_FillRect(gGraph->surfaces.terrain, &(gGraph->surfaces.terrain->clip_rect), gIni->style.bgColor);
+	if (res!=0) {
+		logs(LOG_WARN, "paintTerrain(), SDL_FillRect() failed");
+		return 3;
+	}
+
+	res=SDL_FillRect(gGraph->surfaces.stencil, &(gGraph->surfaces.stencil->clip_rect), ccc_nothing);
+	if (res!=0) {
+		logs(LOG_WARN, "paintTerrain(), SDL_FillRect() failed");
+		return 4;
+	}
+
+	SDL_LockSurface(gGraph->surfaces.terrain);
+	SDL_LockSurface(gGraph->surfaces.stencil);
+	for(i=0 ; i < gIni->level.terrainCount ; i++) {
+		//FIXME : check sanity for id value
+		tile=gRess->style.tiles[gIni->level.terrains[i].id];
+		if (tile==NULL) {
+			logs(LOG_ERROR, "paintTerrain(), tile==NULL");
+			return 5;
+		}
+
+		
+		// Special modifier values :
+		// 15 : Hidden : Lemini hack. Seems to be the same as NO_OVERRIDE
+
+		// Combinable modifier :
+		// 8 : NO_OVERRIDE : marquer les pixels comme indestructibles pour les prochains plaquages
+		// 4 : Upside Down
+		// 2 : REMOVE : oublier (rendre transparent) tous les pixels qu'on a déjà plaqué
+
+		modifier=gIni->level.terrains[i].modifier;
+		// If we match the Lemini hack, change the value to NO_OVERRIDE
+		if (modifier == 15) {
+			modifier=8;
+		}
+
+		// If both REMOVE and NO_OVERRIDE is enabled, prefer NO_OVERRIDE (turn off REMOVE flag)
+		if ( (modifier & 10) == 10) {
+			modifier &= ~2;
+		}
+
+		// For each tile pixel, without going outside of the terrain
+		ymin=(gIni->level.terrains[i].ypos>=0)?0:-gIni->level.terrains[i].ypos;
+		ymax=min(tile->clip_rect.h, gGraph->surfaces.terrain->clip_rect.h - gIni->level.terrains[i].ypos);
+		xmin=(gIni->level.terrains[i].xpos>=0)?0:-gIni->level.terrains[i].xpos;
+		xmax=min(tile->clip_rect.w, gGraph->surfaces.terrain->clip_rect.w - gIni->level.terrains[i].xpos);
+
+		SDL_LockSurface(tile);
+		for (y=ymin; y<ymax; y++) {
+			for (x=xmin; x<xmax; x++) {
+				// If we have Upside Down modifier, count lines in reverse order
+				if (( modifier & 4) == 4 ) {
+					y2=tile->clip_rect.h-1-y;
+				} else {
+					y2=y;
+				}
+				ydst=gIni->level.terrains[i].ypos+y;
+				xdst=gIni->level.terrains[i].xpos+x;
+
+				// Act only if current pixel in tile is not transparent
+				if ( ! isTransparent(tile, x, y2) ) {
+					// Always paint pixel, except in one case:
+					// If we are in NO_OVERRIDE mode and there is already a terrain on the current (source) pixel
+					if ( !( (modifier & 8) == 8 && 
+						getPixel(gGraph->surfaces.stencil, xdst, ydst) == ccc_terrain ) ) {
+						// If we have REMOVE modifier, dstPixel will be rolled back to bgColor, else, it will be identical to the source pixel. We have to update stencil consistenly.
+						if ( (modifier & 2) == 2 ) {
+							dstPixel=gIni->style.bgColor;
+							dstStencil=ccc_nothing;
+						} else {
+							dstPixel=getPixel8BitPalette(tile, x, y2);
+							dstStencil=ccc_terrain;
+						}
+						putPixel(gGraph->surfaces.terrain,xdst,ydst,dstPixel);
+						putPixel(gGraph->surfaces.stencil,xdst,ydst,dstStencil);
+					}
+				}
+			}
+		}
+		SDL_UnlockSurface(tile);
+	}
+	SDL_UnlockSurface(gGraph->surfaces.stencil);
+	SDL_UnlockSurface(gGraph->surfaces.terrain);
+
+	return 0;
+}
+#endif
diff --git a/src/include/graphic.h b/src/include/graphic.h
index c1b2a42..6188af3 100644
--- a/src/include/graphic.h
+++ b/src/include/graphic.h
@@ -1,8 +1,12 @@
 #ifndef GRAPHIC_H
 #define GRAPHIC_H
-
 #include <SDL.h>
 
+#include "data_ini.h"
+#include "data_ress.h"
+
 void my_SDL_init_or_die(char title[], SDL_Rect win_pos, Uint32 init_flags, Uint32 win_flags, Uint32 rend_flags, SDL_Window **win, SDL_Renderer **rend, SDL_RendererInfo *rend_info, SDL_Rect *viewport);
 
+int paintTerrain(gameIni_t *gIni, gameRess_t *gRess, gameGraphics_t *gGraph);
+
 #endif /*GRAPHIC_H*/
-- 
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