- basics for hardware rendered camera textures.

source/common/rendering/gl/renderer/gl_renderer.cpp

@@ -59,6 +59,7 @@
 //#include "r_data/models/models.h"
 #include "gl/renderer/gl_postprocessstate.h"
 #include "gl/system/gl_buffers.h"
+#include "../glbackend/gl_hwtexture.h"
 #include "build.h"
 
 EXTERN_CVAR(Int, screenblocks)
@@ -168,20 +169,17 @@ void FGLRenderer::EndOffscreen()
 //
 //===========================================================================
 
-void FGLRenderer::BindToFrameBuffer(FMaterial *mat)
+void FGLRenderer::BindToFrameBuffer(FTexture *mat)
 {
-#if 0
-	auto BaseLayer = static_cast<FHardwareTexture*>(mat->GetLayer(0, 0));
+	auto pBaseLayer = mat->GetHardwareTexture(0);
+	auto BaseLayer = pBaseLayer ? *pBaseLayer : nullptr;
 
 	if (BaseLayer == nullptr)
 	{
 		// must create the hardware texture first
-		BaseLayer->BindOrCreate(mat->sourcetex, 0, 0, 0, 0);
-		FHardwareTexture::Unbind(0);
-		gl_RenderState.ClearLastMaterial();
+		BaseLayer->CreateTexture(mat->GetWidth(), mat->GetHeight(), FHardwareTexture::TrueColor, false);
 	}
 	BaseLayer->BindToFrameBuffer(mat->GetWidth(), mat->GetHeight());
-#endif
 }
 
 //===========================================================================

source/common/rendering/gl/renderer/gl_renderer.h

@@ -88,20 +88,12 @@ public:
 	bool StartOffscreen();
 	void EndOffscreen();
 
-	void BindToFrameBuffer(FMaterial *mat);
+	void BindToFrameBuffer(FTexture* tex);
 
 private:
 
 	void DrawScene(HWDrawInfo *di, int drawmode);
-	bool QuadStereoCheckInitialRenderContextState();
-	void PresentAnaglyph(bool r, bool g, bool b);
-	void PresentSideBySide();
-	void PresentTopBottom();
-	void prepareInterleavedPresent(FPresentShaderBase& shader);
-	void PresentColumnInterleaved();
-	void PresentRowInterleaved();
-	void PresentCheckerInterleaved();
-	void PresentQuadStereo();
+
 
 };
 

source/common/rendering/gl/system/gl_framebuffer.h

@@ -8,7 +8,6 @@
 namespace OpenGLRenderer
 {
 
-class FHardwareTexture;
 class FGLDebug;
 
 class OpenGLFrameBuffer : public SystemGLFrameBuffer

source/common/textures/textures.h

@@ -139,7 +139,6 @@ class FSerializer;
 namespace OpenGLRenderer
 {
 	class FGLRenderState;
-	class FHardwareTexture;
 }
 
 union FContentIdBuilder

source/glbackend/gl_hwtexture.cpp

@@ -39,6 +39,7 @@
 #include "bitmap.h"
 #include "c_dispatch.h"
 #include "printf.h"
+#include "gl_interface.h"
 //#include "compat.h"
 
 // Workaround to avoid including the dirty 'compat.h' header. This will hopefully not be needed anymore once the texture format uses something better.
@@ -145,6 +146,7 @@ FHardwareTexture::~FHardwareTexture()
 { 
 	alltexturesize -= allocated;
 	if (glTexID != 0) glDeleteTextures(1, &glTexID);
+	if (glBufferID != 0) glDeleteBuffers(1, &glBufferID);
 }
 
 
@@ -153,4 +155,44 @@ unsigned int FHardwareTexture::GetTextureHandle()
 	return glTexID;
 }
 
+static int GetTexDimension(int value)
+{
+	if (value > gl.max_texturesize) return gl.max_texturesize;
+	return value;
+}
+
+//===========================================================================
+// 
+//	Creates a depth buffer for this texture
+//
+//===========================================================================
+
+int FHardwareTexture::GetDepthBuffer(int width, int height)
+{
+	if (glDepthID == 0)
+	{
+		glGenRenderbuffers(1, &glDepthID);
+		glBindRenderbuffer(GL_RENDERBUFFER, glDepthID);
+		glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, width, height);
+		glBindRenderbuffer(GL_RENDERBUFFER, 0);
+	}
+	return glDepthID;
+}
+
+
+//===========================================================================
+// 
+//	Binds this texture's surfaces to the current framrbuffer
+//
+//===========================================================================
+
+void FHardwareTexture::BindToFrameBuffer(int width, int height)
+{
+	width = GetTexDimension(width);
+	height = GetTexDimension(height);
+	glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, glTexID, 0);
+	glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, GetDepthBuffer(width, height));
+	glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, GetDepthBuffer(width, height));
+}
+
 

source/glbackend/gl_hwtexture.h

@@ -1,7 +1,4 @@
-
-#ifndef __GLTEXTURE_H
-#define __GLTEXTURE_H
-
+#pragma once
 class FBitmap;
 class FTexture;
 
@@ -22,12 +19,16 @@ private:
 
 	int mSampler = 0;
 	unsigned int glTexID = 0;
+	unsigned int glDepthID = 0;	// only used by camera textures
+	unsigned int glBufferID = 0;
 	int internalType = TrueColor;
 	bool mipmapped = true;
 	int mWidth = 0, mHeight = 0;
 	int colorId = 0;
 	uint32_t allocated = 0;
 
+	int GetDepthBuffer(int w, int h);
+
 public:
 
 	~FHardwareTexture();
@@ -43,9 +44,9 @@ public:
 	int GetSampler() { return mSampler; }
 	void SetSampler(int sampler) { mSampler = sampler;  }
 	bool isIndexed() const { return internalType == Indexed; }
+	void BindToFrameBuffer(int w, int h);
 
 	friend class FGameTexture;
 };
 
 
-#endif