major fixes to viewport handling which didn't work at all before since it was not executed per poly (closes out SF [1701567]). now advance wars battle scenes work

desmume/src/OGLRender.cpp

@@ -702,8 +702,6 @@ static void OGLRender()
 
 	xglDepthMask(GL_TRUE);
 
-	glViewport(gfx3d.viewport.x,gfx3d.viewport.y,gfx3d.viewport.width,gfx3d.viewport.height);
-
 	float clearColor[4] = {
 		((float)(gfx3d.clearColor&0x1F))/31.0f,
 		((float)((gfx3d.clearColor>>5)&0x1F))/31.0f,
@@ -723,7 +721,7 @@ static void OGLRender()
 	//TODO - properly doublebuffer the display lists
 	{
 
-		u32 lastTextureFormat = 0, lastTexturePalette = 0, lastPolyAttr = 0;
+		u32 lastTextureFormat = 0, lastTexturePalette = 0, lastPolyAttr = 0, lastViewport = 0xFFFFFFFF;
 		// int lastProjIndex = -1;
 
 		for(int i=0;i<gfx3d.polylist->count;i++) {
@@ -775,6 +773,15 @@ static void OGLRender()
 				glVertex4fv(vert->coord);
 			}
 			glEnd();*/
+		
+			if(lastViewport != poly->viewport)
+			{
+				VIEWPORT viewport;
+				viewport.decode(poly->viewport);
+				glViewport(viewport.x,viewport.y,viewport.width,viewport.height);
+				lastViewport = poly->viewport;
+			}
+
 			glBegin(GL_TRIANGLES);
 
 			for(int j = 1; j < (type-1); j++)

desmume/src/gfx3d.cpp

@@ -137,6 +137,7 @@ static CACHE_ALIGN float	trans[4] = {0.0, 0.0, 0.0, 0.0};
 static int		transind = 0;
 static CACHE_ALIGN float	scale[4] = {0.0, 0.0, 0.0, 0.0};
 static int		scaleind = 0;
+static u32 viewport;
 
 //various other registers
 static float _t=0, _s=0;
@@ -295,17 +296,22 @@ void gfx3d_reset()
 	_s=0;
 	last_t = 0;
 	last_s = 0;
+	viewport = 0xBFFF0000;
 	
 	GFX_FIFOclear();
 }
 
 void gfx3d_glViewPort(u32 v)
 {
-	//zero: NHerve messed with this in mod2 and mod3, but im still not sure its perfect. need to research this.
-	gfx3d.viewport.x = (v&0xFF);
-	gfx3d.viewport.y = (v&0xFF);
-	gfx3d.viewport.width = (((v>>16)&0xFF)+1)-(v&0xFF);
-	gfx3d.viewport.height = ((v>>24)+1)-((v>>8)&0xFF);
+	viewport = v;
+}
+
+void VIEWPORT::decode(u32 v) 
+{
+	x = (v&0xFF);
+	y = std::min(191,(int)(((v>>8)&0xFF)));
+	width = (((v>>16)&0xFF)+1)-(v&0xFF);
+	height = ((v>>24)+1)-((v>>8)&0xFF);
 }
 
 
@@ -731,6 +737,7 @@ static void SetVertex()
 			poly.polyAttr = polyAttr;
 			poly.texParam = textureFormat;
 			poly.texPalette = texturePalette;
+			poly.viewport = viewport;
 			polylist->count++;
 		}
 	}
@@ -2205,10 +2212,7 @@ SFORMAT SF_GFX3D[]={
 	{ "GSWB", 4, 1, &gfx3d.wbuffer},
 	{ "GSSM", 4, 1, &gfx3d.sortmode},
 	{ "GSAR", 1, 1, &gfx3d.alphaTestRef},
-	{ "GSVX", 4, 1, &gfx3d.viewport.x},
-	{ "GSVY", 4, 1, &gfx3d.viewport.y},
-	{ "GSVW", 4, 1, &gfx3d.viewport.width},
-	{ "GSVH", 4, 1, &gfx3d.viewport.height},
+	{ "GSVP", 4, 1, &viewport},
 	{ "GSCC", 4, 1, &gfx3d.clearColor},
 	{ "GSCD", 4, 1, &gfx3d.clearDepth},
 	{ "GSFC", 4, 4, gfx3d.fogColor},

desmume/src/gfx3d.h

@@ -64,6 +64,7 @@ struct POLY {
 	u32 polyAttr, texParam, texPalette; //the hardware rendering params
 //	int projIndex; //the index into the projlist that this poly uses
 	u32 pad;
+	u32 viewport;
 
 	bool isTranslucent()
 	{
@@ -118,6 +119,12 @@ struct VERTLIST {
 	int count;
 };
 
+
+struct VIEWPORT {
+	int x, y, width, height;
+	void decode(u32 v);
+};
+
 //used to communicate state to the renderer
 struct GFX3D
 {
@@ -153,13 +160,6 @@ struct GFX3D
 
 	u8 alphaTestRef;
 
-	struct VIEWPORT {
-		VIEWPORT()
-			: x(0), y(0), width(256), height(256)
-		{}
-		int x, y, width, height;
-	} viewport;
-
 	u32 clearDepth;
 	u32 clearColor;
 	float fogColor[4];

desmume/src/rasterize.cpp

@@ -760,12 +760,21 @@ static void drawscanline(edge_fx_fl *pLeft, edge_fx_fl *pRight)
 
 	//CONSIDER: in case some other math is wrong (shouldve been clipped OK), we might go out of bounds here.
 	//better check the Y value.
-	//but, we think the math is always right
+	if(pLeft->Y<0 || pLeft->Y>191) {
+		printf("rasterizer rendering at y=%d! oops!\n",pLeft->Y);
+		return;
+	}
+
+	int x = XStart;
 
 	while(width-- > 0)
 	{
+		if(x<0 || x>255) {
+			printf("rasterizer rendering at x=%d! oops!\n",x);
+		}
 		pixel(adr,color[0],color[1],color[2],u,v,1.0f/invw,z);
 		adr++;
+		x++;
 
 		invw += dinvw_dx;
 		u += du_dx;
@@ -1173,6 +1182,8 @@ static void SoftRastRender()
 		clipPoly(&gfx3d.polylist->list[gfx3d.indexlist[i]]);
 	}
 
+	//printf("%d %d %d %d\n",gfx3d.viewport.x,gfx3d.viewport.y,gfx3d.viewport.width,gfx3d.viewport.height);
+
 	//viewport transforms
 	for(int i=0;i<clippedPolyCounter;i++)
 	{
@@ -1199,10 +1210,15 @@ static void SoftRastRender()
 			vert.fcolor[2] /= vert.coord[3];
 
 			//viewport transformation
-			vert.coord[0] *= gfx3d.viewport.width;
-			vert.coord[0] += gfx3d.viewport.x;
-			vert.coord[1] *= gfx3d.viewport.height;
-			vert.coord[1] += gfx3d.viewport.y;
+			VIEWPORT viewport;
+			viewport.decode(poly.poly->viewport);
+			vert.coord[0] *= viewport.width;
+			vert.coord[0] += viewport.x;
+			vert.coord[1] *= viewport.height;
+			vert.coord[1] += viewport.y;
+			if(vert.coord[1]>192||vert.color[1]<0) {
+				int zzz=9;
+			}
 			vert.coord[1] = 192 - vert.coord[1];
 		}
 	}