mirror of
https://github.com/minetest/irrlicht.git
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401 lines
10 KiB
C++
401 lines
10 KiB
C++
// Copyright (C) 2015 Patryk Nadrowski
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// This file is part of the "Irrlicht Engine".
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// For conditions of distribution and use, see copyright notice in irrlicht.h
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#ifndef __C_OGLCORE_RENDER_TARGET_H_INCLUDED__
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#define __C_OGLCORE_RENDER_TARGET_H_INCLUDED__
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#include "IRenderTarget.h"
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#ifndef GL_FRAMEBUFFER_INCOMPLETE_FORMATS
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#define GL_FRAMEBUFFER_INCOMPLETE_FORMATS GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT
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#endif
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#ifndef GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS
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#define GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT
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#endif
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namespace irr
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{
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namespace video
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{
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template <class TOpenGLDriver, class TOpenGLTexture>
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class COpenGLCoreRenderTarget : public IRenderTarget
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{
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public:
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COpenGLCoreRenderTarget(TOpenGLDriver* driver) : AssignedDepth(false), AssignedStencil(false), RequestTextureUpdate(false), RequestDepthStencilUpdate(false),
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BufferID(0), ColorAttachment(0), MultipleRenderTarget(0), Driver(driver)
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{
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#ifdef _DEBUG
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setDebugName("COpenGLCoreRenderTarget");
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#endif
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DriverType = Driver->getDriverType();
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Size = Driver->getScreenSize();
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ColorAttachment = Driver->getFeature().ColorAttachment;
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MultipleRenderTarget = Driver->getFeature().MultipleRenderTarget;
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if (ColorAttachment > 0)
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Driver->irrGlGenFramebuffers(1, &BufferID);
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AssignedTextures.set_used(static_cast<u32>(ColorAttachment));
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for (u32 i = 0; i < AssignedTextures.size(); ++i)
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AssignedTextures[i] = GL_NONE;
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}
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virtual ~COpenGLCoreRenderTarget()
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{
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if (ColorAttachment > 0 && BufferID != 0)
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Driver->irrGlDeleteFramebuffers(1, &BufferID);
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for (u32 i = 0; i < Textures.size(); ++i)
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{
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if (Textures[i])
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Textures[i]->drop();
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}
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if (DepthStencil)
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DepthStencil->drop();
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}
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void setTextures(ITexture* const * textures, u32 numTextures, ITexture* depthStencil, const E_CUBE_SURFACE* cubeSurfaces, u32 numCubeSurfaces) override
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{
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bool needSizeUpdate = false;
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// Set color attachments.
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if (!Textures.equals(textures, numTextures) || !CubeSurfaces.equals(cubeSurfaces, numCubeSurfaces))
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{
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needSizeUpdate = true;
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core::array<ITexture*> prevTextures(Textures);
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if (numTextures > static_cast<u32>(ColorAttachment))
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{
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core::stringc message = "This GPU supports up to ";
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message += static_cast<u32>(ColorAttachment);
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message += " textures per render target.";
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os::Printer::log(message.c_str(), ELL_WARNING);
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}
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Textures.set_used(core::min_(numTextures, static_cast<u32>(ColorAttachment)));
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for (u32 i = 0; i < Textures.size(); ++i)
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{
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TOpenGLTexture* currentTexture = (textures[i] && textures[i]->getDriverType() == DriverType) ? static_cast<TOpenGLTexture*>(textures[i]) : 0;
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GLuint textureID = 0;
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if (currentTexture)
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{
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textureID = currentTexture->getOpenGLTextureName();
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}
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if (textureID != 0)
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{
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Textures[i] = textures[i];
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Textures[i]->grab();
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}
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else
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{
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Textures[i] = 0;
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}
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}
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for (u32 i = 0; i < prevTextures.size(); ++i)
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{
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if (prevTextures[i])
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prevTextures[i]->drop();
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}
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RequestTextureUpdate = true;
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}
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if (!CubeSurfaces.equals(cubeSurfaces, numCubeSurfaces))
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{
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CubeSurfaces.set_data(cubeSurfaces, numCubeSurfaces);
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RequestTextureUpdate = true;
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}
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// Set depth and stencil attachments.
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if (DepthStencil != depthStencil)
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{
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if (DepthStencil)
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{
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DepthStencil->drop();
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DepthStencil = 0;
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}
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needSizeUpdate = true;
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TOpenGLTexture* currentTexture = (depthStencil && depthStencil->getDriverType() == DriverType) ? static_cast<TOpenGLTexture*>(depthStencil) : 0;
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if (currentTexture)
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{
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if (currentTexture->getType() == ETT_2D)
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{
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GLuint textureID = currentTexture->getOpenGLTextureName();
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const ECOLOR_FORMAT textureFormat = (textureID != 0) ? depthStencil->getColorFormat() : ECF_UNKNOWN;
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if (IImage::isDepthFormat(textureFormat))
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{
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DepthStencil = depthStencil;
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DepthStencil->grab();
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}
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else
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{
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os::Printer::log("Ignoring depth/stencil texture without depth color format.", ELL_WARNING);
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}
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}
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else
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{
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os::Printer::log("This driver doesn't support depth/stencil to cubemaps.", ELL_WARNING);
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}
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}
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RequestDepthStencilUpdate = true;
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}
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if (needSizeUpdate)
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{
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// Set size required for a viewport.
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ITexture* firstTexture = getTexture();
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if (firstTexture)
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Size = firstTexture->getSize();
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else
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{
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if (DepthStencil)
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Size = DepthStencil->getSize();
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else
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Size = Driver->getScreenSize();
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}
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}
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}
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void update()
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{
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if (RequestTextureUpdate || RequestDepthStencilUpdate)
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{
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// Set color attachments.
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if (RequestTextureUpdate)
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{
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// Set new color textures.
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const u32 textureSize = core::min_(Textures.size(), AssignedTextures.size());
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for (u32 i = 0; i < textureSize; ++i)
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{
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TOpenGLTexture* currentTexture = static_cast<TOpenGLTexture*>(Textures[i]);
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GLuint textureID = currentTexture ? currentTexture->getOpenGLTextureName() : 0;
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if (textureID != 0)
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{
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AssignedTextures[i] = GL_COLOR_ATTACHMENT0 + i;
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GLenum textarget = currentTexture->getType() == ETT_2D ? GL_TEXTURE_2D : GL_TEXTURE_CUBE_MAP_POSITIVE_X + (int)CubeSurfaces[i];
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Driver->irrGlFramebufferTexture2D(GL_FRAMEBUFFER, AssignedTextures[i], textarget, textureID, 0);
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#ifdef _DEBUG
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Driver->testGLError(__LINE__);
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#endif
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}
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else if (AssignedTextures[i] != GL_NONE)
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{
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AssignedTextures[i] = GL_NONE;
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Driver->irrGlFramebufferTexture2D(GL_FRAMEBUFFER, AssignedTextures[i], GL_TEXTURE_2D, 0, 0);
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os::Printer::log("Error: Could not set render target.", ELL_ERROR);
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}
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}
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// Reset other render target channels.
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for (u32 i = textureSize; i < AssignedTextures.size(); ++i)
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{
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if (AssignedTextures[i] != GL_NONE)
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{
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Driver->irrGlFramebufferTexture2D(GL_FRAMEBUFFER, AssignedTextures[i], GL_TEXTURE_2D, 0, 0);
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AssignedTextures[i] = GL_NONE;
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}
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}
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RequestTextureUpdate = false;
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}
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// Set depth and stencil attachments.
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if (RequestDepthStencilUpdate)
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{
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const ECOLOR_FORMAT textureFormat = (DepthStencil) ? DepthStencil->getColorFormat() : ECF_UNKNOWN;
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if (IImage::isDepthFormat(textureFormat))
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{
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GLuint textureID = static_cast<TOpenGLTexture*>(DepthStencil)->getOpenGLTextureName();
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#ifdef _IRR_EMSCRIPTEN_PLATFORM_ // The WEBGL_depth_texture extension does not allow attaching stencil+depth separate.
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if (textureFormat == ECF_D24S8)
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{
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GLenum attachment = 0x821A; // GL_DEPTH_STENCIL_ATTACHMENT
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Driver->irrGlFramebufferTexture2D(GL_FRAMEBUFFER, attachment, GL_TEXTURE_2D, textureID, 0);
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AssignedStencil = true;
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}
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else
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{
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Driver->irrGlFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, textureID, 0);
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AssignedStencil = false;
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}
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#else
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Driver->irrGlFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, textureID, 0);
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if (textureFormat == ECF_D24S8)
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{
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Driver->irrGlFramebufferTexture2D(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, textureID, 0);
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AssignedStencil = true;
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}
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else
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{
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if (AssignedStencil)
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Driver->irrGlFramebufferTexture2D(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
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AssignedStencil = false;
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}
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#endif
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AssignedDepth = true;
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}
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else
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{
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if (AssignedDepth)
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Driver->irrGlFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
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if (AssignedStencil)
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Driver->irrGlFramebufferTexture2D(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
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AssignedDepth = false;
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AssignedStencil = false;
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}
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#ifdef _DEBUG
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Driver->testGLError(__LINE__);
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#endif
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RequestDepthStencilUpdate = false;
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}
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// Configure drawing operation.
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if (ColorAttachment > 0 && BufferID != 0)
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{
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const u32 textureSize = Textures.size();
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if (textureSize == 0)
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Driver->irrGlDrawBuffer(GL_NONE);
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else if (textureSize == 1 || MultipleRenderTarget == 0)
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Driver->irrGlDrawBuffer(GL_COLOR_ATTACHMENT0);
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else
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{
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const u32 bufferCount = core::min_(MultipleRenderTarget, core::min_(textureSize, AssignedTextures.size()));
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Driver->irrGlDrawBuffers(bufferCount, AssignedTextures.pointer());
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}
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#ifdef _DEBUG
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Driver->testGLError(__LINE__);
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#endif
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}
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#ifdef _DEBUG
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checkFBO(Driver);
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#endif
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}
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}
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GLuint getBufferID() const
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{
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return BufferID;
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}
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const core::dimension2d<u32>& getSize() const
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{
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return Size;
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}
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ITexture* getTexture() const
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{
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for (u32 i = 0; i < Textures.size(); ++i)
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{
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if (Textures[i])
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return Textures[i];
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}
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return 0;
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}
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protected:
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bool checkFBO(TOpenGLDriver* driver)
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{
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if (ColorAttachment == 0)
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return true;
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GLenum status = driver->irrGlCheckFramebufferStatus(GL_FRAMEBUFFER);
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switch (status)
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{
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case GL_FRAMEBUFFER_COMPLETE:
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return true;
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case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER:
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os::Printer::log("FBO has invalid read buffer", ELL_ERROR);
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break;
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case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER:
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os::Printer::log("FBO has invalid draw buffer", ELL_ERROR);
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break;
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case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT:
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os::Printer::log("FBO has one or several incomplete image attachments", ELL_ERROR);
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break;
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case GL_FRAMEBUFFER_INCOMPLETE_FORMATS:
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os::Printer::log("FBO has one or several image attachments with different internal formats", ELL_ERROR);
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break;
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case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS:
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os::Printer::log("FBO has one or several image attachments with different dimensions", ELL_ERROR);
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break;
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case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:
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os::Printer::log("FBO missing an image attachment", ELL_ERROR);
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break;
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case GL_FRAMEBUFFER_UNSUPPORTED:
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os::Printer::log("FBO format unsupported", ELL_ERROR);
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break;
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default:
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os::Printer::log("FBO error", ELL_ERROR);
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break;
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}
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return false;
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}
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core::array<GLenum> AssignedTextures;
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bool AssignedDepth;
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bool AssignedStencil;
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bool RequestTextureUpdate;
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bool RequestDepthStencilUpdate;
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GLuint BufferID;
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core::dimension2d<u32> Size;
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u32 ColorAttachment;
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u32 MultipleRenderTarget;
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TOpenGLDriver* Driver;
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};
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}
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}
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#endif
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