- reinstated old code for rendering fog boundaries and mirrot surfaces without shaders.

- added code for filling the render list for textured dynamic lights. This is not yet active because no code is present to handle this data.

src/gl/compatibility/gl_20.cpp

@@ -49,6 +49,7 @@
 #include "gl/dynlights/gl_dynlight.h"
 #include "gl/utility/gl_geometric.h"
 #include "gl/renderer/gl_renderer.h"
+#include "gl/renderer/gl_lightdata.h"
 #include "gl/system/gl_interface.h"
 #include "gl/system/gl_cvars.h"
 #include "gl/renderer/gl_renderstate.h"
@@ -452,7 +453,7 @@ bool gl_SetupLight(int group, Plane & p, ADynamicLight * light, Vector & nearPt,
 
 bool gl_SetupLightTexture()
 {
-	if (GLRenderer->gllight == NULL) return false;
+	if (GLRenderer->gllight == nullptr) return false;
 	FMaterial * pat = FMaterial::ValidateTexture(GLRenderer->gllight, false);
 	pat->Bind(CLAMP_XY, 0);
 	return true;
@@ -464,6 +465,95 @@ bool gl_SetupLightTexture()
 //
 //==========================================================================
 
+bool GLWall::PutWallCompat(int passflag)
+{
+	static int list_indices[2][2] =
+	{ { GLLDL_WALLS_PLAIN, GLLDL_WALLS_FOG },{ GLLDL_WALLS_MASKED, GLLDL_WALLS_FOGMASKED } };
+
+	// are lights possible?
+	if (gl_fixedcolormap != CM_DEFAULT || !gl_lights || seg->sidedef == nullptr || type == RENDERWALL_M2SNF || !gltexture) return false;
+
+	// multipassing these is problematic.
+	if ((flags&GLWF_SKYHACK && type == RENDERWALL_M2S)) return false;
+
+	// Any lights affecting this wall?
+	if (!(seg->sidedef->Flags & WALLF_POLYOBJ))
+	{
+		if (seg->sidedef->lighthead == nullptr) return false;
+	}
+	else if (sub)
+	{
+		if (sub->lighthead != nullptr) return false;
+	}
+
+	bool foggy = (!gl_isBlack(Colormap.FadeColor) || level.flags&LEVEL_HASFADETABLE);
+	bool masked = passflag == 2 && gltexture->isMasked();
+
+	int list = list_indices[masked][foggy];
+	if (list == GLLDL_WALLS_PLAIN)
+	{
+		if (gltexture->tex->gl_info.Brightmap && gl.glslversion >= 0.f) list = GLLDL_WALLS_BRIGHT;
+		//if (flags & GLWF_GLOW) list = GLLDL_WALLS_BRIGHT;
+	}
+	gl_drawinfo->dldrawlists[list].AddWall(this);
+	return true;
+
+}
+
+//==========================================================================
+//
+// Fog boundary without any shader support
+//
+//==========================================================================
+
+void GLWall::RenderFogBoundaryCompat()
+{
+	// without shaders some approximation is needed. This won't look as good
+	// as the shader version but it's an acceptable compromise.
+	float fogdensity = gl_GetFogDensity(lightlevel, Colormap.FadeColor);
+
+	float dist1 = Dist2(ViewPos.X, ViewPos.Y, glseg.x1, glseg.y1);
+	float dist2 = Dist2(ViewPos.X, ViewPos.Y, glseg.x2, glseg.y2);
+
+	// these values were determined by trial and error and are scale dependent!
+	float fogd1 = (0.95f - exp(-fogdensity*dist1 / 62500.f)) * 1.05f;
+	float fogd2 = (0.95f - exp(-fogdensity*dist2 / 62500.f)) * 1.05f;
+
+	float fc[4] = { Colormap.FadeColor.r / 255.0f,Colormap.FadeColor.g / 255.0f,Colormap.FadeColor.b / 255.0f,fogd2 };
+
+	gl_RenderState.EnableTexture(false);
+	gl_RenderState.EnableFog(false);
+	gl_RenderState.AlphaFunc(GL_GEQUAL, 0);
+	gl_RenderState.Apply();
+	glEnable(GL_POLYGON_OFFSET_FILL);
+	glPolygonOffset(-1.0f, -128.0f);
+	glDepthFunc(GL_LEQUAL);
+	glColor4f(fc[0], fc[1], fc[2], fogd1);
+	glBegin(GL_TRIANGLE_FAN);
+	glTexCoord2f(lolft.u, lolft.v);
+	glVertex3f(glseg.x1, zbottom[0], glseg.y1);
+	glTexCoord2f(uplft.u, uplft.v);
+	glVertex3f(glseg.x1, ztop[0], glseg.y1);
+	glColor4f(fc[0], fc[1], fc[2], fogd2);
+	glTexCoord2f(uprgt.u, uprgt.v);
+	glVertex3f(glseg.x2, ztop[1], glseg.y2);
+	glTexCoord2f(lorgt.u, lorgt.v);
+	glVertex3f(glseg.x2, zbottom[1], glseg.y2);
+	glEnd();
+	glDepthFunc(GL_LESS);
+	glPolygonOffset(0.0f, 0.0f);
+	glDisable(GL_POLYGON_OFFSET_FILL);
+	gl_RenderState.EnableFog(true);
+	gl_RenderState.AlphaFunc(GL_GEQUAL, 0.5f);
+	gl_RenderState.EnableTexture(true);
+}
+
+//==========================================================================
+//
+//
+//
+//==========================================================================
+
 void FGLRenderer::RenderMultipassStuff()
 {
 	return;

src/gl/scene/gl_wall.h

@@ -171,10 +171,13 @@ public:
 private:
 
 	void CheckGlowing();
+	bool PutWallCompat(int passflag);
 	void PutWall(bool translucent);
 	void PutPortal(int ptype);
 	void CheckTexturePosition();
 
+	void RenderFogBoundaryCompat();
+
 	void Put3DWall(lightlist_t * lightlist, bool translucent);
 	void SplitWallComplex(sector_t * frontsector, bool translucent, float maplightbottomleft, float maplightbottomright);
 	void SplitWall(sector_t * frontsector, bool translucent);

src/gl/scene/gl_walls.cpp

@@ -139,6 +139,11 @@ void GLWall::PutWall(bool translucent)
 	}
 	else
 	{
+		if (gl.lightmethod == LM_SOFTWARE && !translucent)
+		{
+			// This is not yet ready.
+			//if (PutWallCompat(passflag[type])) return;
+		}
 
 		bool masked;
 

src/gl/scene/gl_walls_draw.cpp

@@ -227,6 +227,8 @@ void GLWall::RenderWall(int textured, unsigned int *store)
 void GLWall::RenderFogBoundary()
 {
 	if (gl_fogmode && gl_fixedcolormap == 0)
+	{
+		if (gl.glslversion > 0.f)
 		{
 			int rel = rellight + getExtraLight();
 			gl_SetFog(lightlevel, rel, &Colormap, false);
@@ -239,6 +241,11 @@ void GLWall::RenderFogBoundary()
 			glDisable(GL_POLYGON_OFFSET_FILL);
 			gl_RenderState.SetEffect(EFF_NONE);
 		}
+		else
+		{
+			RenderFogBoundaryCompat();
+		}
+	}
 }
 
 
@@ -255,12 +262,19 @@ void GLWall::RenderMirrorSurface()
 	Vector v(glseg.y2-glseg.y1, 0 ,-glseg.x2+glseg.x1);
 	v.Normalize();
 
+	if (gl.glslversion >= 0.f)
+	{
 		// we use texture coordinates and texture matrix to pass the normal stuff to the shader so that the default vertex buffer format can be used as is.
 		lolft.u = lorgt.u = uplft.u = uprgt.u = v.X();
 		lolft.v = lorgt.v = uplft.v = uprgt.v = v.Z();
 
 		gl_RenderState.EnableTextureMatrix(true);
 		gl_RenderState.mTextureMatrix.computeNormalMatrix(gl_RenderState.mViewMatrix);
+	}
+	else
+	{
+		glNormal3fv(&v[0]);
+	}
 
 	// Use sphere mapping for this
 	gl_RenderState.SetEffect(EFF_SPHEREMAP);

src/gl/system/gl_load.c

@@ -42,6 +42,8 @@ static void* SunGetProcAddress (const GLubyte* name)
 #if defined(_WIN32)
 
 #ifdef _MSC_VER
+// disable inlining here because it creates an incredible amount of bloat in this file.
+#pragma inline_depth(0)
 #pragma warning(disable: 4055)
 #pragma warning(disable: 4054)
 #pragma warning(disable: 4996)