gl: (oit) Far plane is 0 in final depth test. minor gl cache reset fix

other misc changes

core/rend/gl4/abuffer.cpp

@@ -71,7 +71,7 @@ vec4 resolveAlphaBlend(ivec2 coords) {
 	
 	vec4 finalColor = texture(tex, gl_FragCoord.xy / textureSize(tex, 0));
 	vec4 secondaryBuffer = vec4(0.0); // Secondary accumulation buffer
-	float depth = 1.0;
+	float depth = 0.0;
 	
 	bool do_depth_test = false;
 	for (int i = 0; i < num_frag; i++)

core/rend/gl4/gldraw.cpp

@@ -159,7 +159,7 @@ template <u32 Type, bool SortingEnabled>
 
 	SetTileClip(gp->tileclip, CurrentShader->pp_ClipTest);
 
-	//This bit control which pixels are affected
+	//This bit controls which pixels are affected
 	//by modvols
 	const u32 stencil=(gp->pcw.Shadow!=0)?0x80:0x0;
 

core/rend/gl4/gltex.cpp

@@ -9,10 +9,10 @@ GLuint gl4BindRTT(u32 addy, u32 fbw, u32 fbh, u32 channels, u32 fmt)
 	gl.rtt.TexAddr=addy>>3;
 
 	// Find the smallest power of two texture that fits the viewport
-	int fbh2 = 2;
+	int fbh2 = 8;
 	while (fbh2 < fbh)
 		fbh2 *= 2;
-	int fbw2 = 2;
+	int fbw2 = 8;
 	while (fbw2 < fbw)
 		fbw2 *= 2;
 
@@ -23,8 +23,6 @@ GLuint gl4BindRTT(u32 addy, u32 fbw, u32 fbh, u32 channels, u32 fmt)
 		fbw2 *= settings.rend.RenderToTextureUpscale;
 		fbh2 *= settings.rend.RenderToTextureUpscale;
 	}
-	// Get the currently bound frame buffer object. On most platforms this just gives 0.
-	//glGetIntegerv(GL_FRAMEBUFFER_BINDING, &m_i32OriginalFbo);
 
 	// Create a texture for rendering to
 	gl.rtt.tex = glcache.GenTexture();

core/rend/gles/glcache.h

@@ -188,9 +188,18 @@ public:
 		_stencil_dpfail = 0xFFFFFFFFu;
 		_stencil_dppass = 0xFFFFFFFFu;
 		_stencil_mask = 0;
+		if (_texture_cache_size > 0)
+		{
+		   glDeleteTextures(_texture_cache_size, _texture_ids);
+		   _texture_cache_size = 0;
+		}
 	}
 
-	void DisableCache() { _disable_cache = true; }
+	void DisableCache()
+	{
+		_disable_cache = true;
+		Reset();
+	}
 	void EnableCache()
 	{
 	   _disable_cache = false;

core/rend/gles/gldraw.cpp

@@ -127,9 +127,7 @@ s32 SetTileClip(u32 val, GLint uniform)
 void SetCull(u32 CulliMode)
 {
 	if (CullMode[CulliMode]==GL_NONE)
-	{ 
 		glcache.Disable(GL_CULL_FACE);
-	}
 	else
 	{
 		glcache.Enable(GL_CULL_FACE);

core/rend/gles/gles.cpp

@@ -25,7 +25,8 @@
 float fb_scale_x, fb_scale_y; // FIXME
 
 //Fragment and vertex shaders code
-const char* VertexShaderSource = R"(%s
+
+static const char* VertexShaderSource = R"(%s
 #define TARGET_GL %s
 #define pp_Gouraud %d
 
@@ -290,7 +291,7 @@ void main()
 }
 )";
 
-const char* ModifierVolumeShader =
+static const char* ModifierVolumeShader = 
 R"(%s
 #define TARGET_GL %s
 
@@ -873,14 +874,14 @@ void UpdateFogTexture(u8 *fog_table, GLenum texture_slot, GLint fog_image_format
 	if (fogTextureId == 0)
 	{
 		fogTextureId = glcache.GenTexture();
-		glBindTexture(GL_TEXTURE_2D, fogTextureId);
-		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
-		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+		glcache.BindTexture(GL_TEXTURE_2D, fogTextureId);
+		glcache.TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+		glcache.TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+		glcache.TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+		glcache.TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 	}
 	else
-		glBindTexture(GL_TEXTURE_2D, fogTextureId);
+		glcache.BindTexture(GL_TEXTURE_2D, fogTextureId);
 
 	u8 temp_tex_buffer[256];
 	MakeFogTexture(temp_tex_buffer);