986 lines
25 KiB
C++
986 lines
25 KiB
C++
// Copyright (C) 2002-2012 Nikolaus Gebhardt
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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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#include "IrrCompileConfig.h"
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#ifdef _IRR_COMPILE_WITH_OPENGL_
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#include "irrTypes.h"
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#include "COpenGLTexture.h"
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#include "COpenGLDriver.h"
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#include "os.h"
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#include "CColorConverter.h"
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#include "irrString.h"
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namespace irr
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{
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namespace video
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{
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extern bool useCoreContext;
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//! constructor for usual textures
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COpenGLTexture::COpenGLTexture(IImage* origImage, const io::path& name, void* mipmapData, COpenGLDriver* driver)
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: ITexture(name), ColorFormat(ECF_A8R8G8B8), Driver(driver), Image(0), MipImage(0),
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TextureName(0), InternalFormat(GL_RGBA), PixelFormat(GL_BGRA_EXT),
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PixelType(GL_UNSIGNED_BYTE), MipLevelStored(0), MipmapLegacyMode(true),
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IsRenderTarget(false), AutomaticMipmapUpdate(false),
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ReadOnlyLock(false), KeepImage(true)
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{
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#ifdef _DEBUG
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setDebugName("COpenGLTexture");
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#endif
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HasMipMaps = Driver->getTextureCreationFlag(ETCF_CREATE_MIP_MAPS);
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getImageValues(origImage);
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glGenTextures(1, &TextureName);
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if (ImageSize==TextureSize)
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{
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Image = Driver->createImage(ColorFormat, ImageSize);
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origImage->copyTo(Image);
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}
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else
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{
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Image = Driver->createImage(ColorFormat, TextureSize);
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// scale texture
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origImage->copyToScaling(Image);
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}
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uploadTexture(true, mipmapData);
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if (!KeepImage)
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{
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Image->drop();
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Image=0;
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}
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}
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//! constructor for basic setup (only for derived classes)
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COpenGLTexture::COpenGLTexture(const io::path& name, COpenGLDriver* driver)
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: ITexture(name), ColorFormat(ECF_A8R8G8B8), Driver(driver), Image(0), MipImage(0),
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TextureName(0), InternalFormat(GL_RGBA), PixelFormat(GL_BGRA_EXT),
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PixelType(GL_UNSIGNED_BYTE), MipLevelStored(0), HasMipMaps(true),
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MipmapLegacyMode(true), IsRenderTarget(false), AutomaticMipmapUpdate(false),
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ReadOnlyLock(false), KeepImage(true)
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{
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#ifdef _DEBUG
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setDebugName("COpenGLTexture");
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#endif
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}
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//! destructor
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COpenGLTexture::~COpenGLTexture()
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{
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if (TextureName)
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glDeleteTextures(1, &TextureName);
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if (Image)
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Image->drop();
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}
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//! Choose best matching color format, based on texture creation flags
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ECOLOR_FORMAT COpenGLTexture::getBestColorFormat(ECOLOR_FORMAT format)
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{
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ECOLOR_FORMAT destFormat = ECF_A8R8G8B8;
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switch (format)
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{
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case ECF_A1R5G5B5:
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if (!Driver->getTextureCreationFlag(ETCF_ALWAYS_32_BIT))
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destFormat = ECF_A1R5G5B5;
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break;
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case ECF_R5G6B5:
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if (!Driver->getTextureCreationFlag(ETCF_ALWAYS_32_BIT))
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destFormat = ECF_A1R5G5B5;
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break;
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case ECF_A8R8G8B8:
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if (Driver->getTextureCreationFlag(ETCF_ALWAYS_16_BIT) ||
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Driver->getTextureCreationFlag(ETCF_OPTIMIZED_FOR_SPEED))
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destFormat = ECF_A1R5G5B5;
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break;
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case ECF_R8G8B8:
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if (Driver->getTextureCreationFlag(ETCF_ALWAYS_16_BIT) ||
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Driver->getTextureCreationFlag(ETCF_OPTIMIZED_FOR_SPEED))
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destFormat = ECF_A1R5G5B5;
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default:
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break;
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}
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if (Driver->getTextureCreationFlag(ETCF_NO_ALPHA_CHANNEL))
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{
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switch (destFormat)
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{
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case ECF_A1R5G5B5:
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destFormat = ECF_R5G6B5;
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break;
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case ECF_A8R8G8B8:
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destFormat = ECF_R8G8B8;
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break;
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default:
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break;
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}
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}
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return destFormat;
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}
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//! Get opengl values for the GPU texture storage
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GLint COpenGLTexture::getOpenGLFormatAndParametersFromColorFormat(ECOLOR_FORMAT format,
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GLint& filtering,
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GLenum& colorformat,
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GLenum& type)
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{
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// default
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filtering = GL_LINEAR;
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colorformat = GL_RGBA;
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type = GL_UNSIGNED_BYTE;
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GLenum internalformat = GL_RGBA;
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switch(format)
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{
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case ECF_A1R5G5B5:
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colorformat=GL_BGRA_EXT;
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type=GL_UNSIGNED_SHORT_1_5_5_5_REV;
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internalformat = GL_RGBA;
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break;
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case ECF_R5G6B5:
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colorformat=GL_RGB;
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type=GL_UNSIGNED_SHORT_5_6_5;
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internalformat = GL_RGB;
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break;
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case ECF_R8G8B8:
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colorformat=GL_BGR;
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type=GL_UNSIGNED_BYTE;
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internalformat = GL_RGB;
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break;
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case ECF_A8R8G8B8:
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colorformat=GL_BGRA_EXT;
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if (Driver->Version > 101)
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type=GL_UNSIGNED_INT_8_8_8_8_REV;
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internalformat = GL_RGBA;
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break;
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// _rg formats.
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case ECF_R8:
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colorformat = GL_RED;
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type = GL_UNSIGNED_BYTE;
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internalformat = GL_R8;
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break;
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case ECF_R16:
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colorformat = GL_RED;
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type = GL_UNSIGNED_SHORT;
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internalformat = GL_R16;
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break;
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case ECF_R8G8:
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colorformat = GL_RG;
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type = GL_UNSIGNED_BYTE;
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internalformat = GL_RG8;
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break;
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case ECF_R16G16:
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colorformat = GL_RG;
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type = GL_UNSIGNED_SHORT;
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internalformat = GL_RG16;
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break;
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// Floating Point texture formats. Thanks to Patryk "Nadro" Nadrowski.
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case ECF_R16F:
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{
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#ifdef GL_ARB_texture_rg
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filtering = GL_NEAREST;
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colorformat = GL_RED;
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type = GL_FLOAT;
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internalformat = GL_R16F;
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#else
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ColorFormat = ECF_A8R8G8B8;
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internalformat = GL_RGB8;
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#endif
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}
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break;
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case ECF_G16R16F:
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{
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#ifdef GL_ARB_texture_rg
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filtering = GL_NEAREST;
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colorformat = GL_RG;
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type = GL_FLOAT;
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internalformat = GL_RG16F;
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#else
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ColorFormat = ECF_A8R8G8B8;
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internalformat = GL_RGB8;
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#endif
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}
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break;
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case ECF_A16B16G16R16F:
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{
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#ifdef GL_ARB_texture_rg
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filtering = GL_NEAREST;
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colorformat = GL_RGBA;
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type = GL_FLOAT;
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internalformat = GL_RGBA16F_ARB;
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#else
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ColorFormat = ECF_A8R8G8B8;
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internalformat = GL_RGBA8;
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#endif
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}
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break;
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case ECF_R32F:
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{
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#ifdef GL_ARB_texture_rg
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filtering = GL_NEAREST;
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colorformat = GL_RED;
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type = GL_FLOAT;
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internalformat = GL_R32F;
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#else
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ColorFormat = ECF_A8R8G8B8;
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internalformat = GL_RGB8;
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#endif
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}
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break;
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case ECF_G32R32F:
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{
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#ifdef GL_ARB_texture_rg
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filtering = GL_NEAREST;
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colorformat = GL_RG;
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type = GL_FLOAT;
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internalformat = GL_RG32F;
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#else
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ColorFormat = ECF_A8R8G8B8;
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internalformat = GL_RGB8;
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#endif
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}
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break;
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case ECF_A32B32G32R32F:
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{
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#ifdef GL_ARB_texture_float
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filtering = GL_NEAREST;
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colorformat = GL_RGBA;
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type = GL_FLOAT;
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internalformat = GL_RGBA32F_ARB;
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#else
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ColorFormat = ECF_A8R8G8B8;
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internalformat = GL_RGBA8;
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#endif
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}
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break;
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default:
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{
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os::Printer::log("Unsupported texture format", ELL_ERROR);
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internalformat = GL_RGBA8;
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}
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}
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#if defined(GL_ARB_framebuffer_sRGB) || defined(GL_EXT_framebuffer_sRGB)
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if (Driver->Params.HandleSRGB)
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{
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if (internalformat==GL_RGBA)
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internalformat=GL_SRGB_ALPHA_EXT;
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else if (internalformat==GL_RGB)
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internalformat=GL_SRGB_EXT;
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}
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#endif
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return internalformat;
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}
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// prepare values ImageSize, TextureSize, and ColorFormat based on image
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void COpenGLTexture::getImageValues(IImage* image)
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{
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if (!image)
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{
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os::Printer::log("No image for OpenGL texture.", ELL_ERROR);
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return;
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}
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ImageSize = image->getDimension();
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if ( !ImageSize.Width || !ImageSize.Height)
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{
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os::Printer::log("Invalid size of image for OpenGL Texture.", ELL_ERROR);
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return;
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}
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const f32 ratio = (f32)ImageSize.Width/(f32)ImageSize.Height;
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if ((ImageSize.Width>Driver->MaxTextureSize) && (ratio >= 1.0f))
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{
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ImageSize.Width = Driver->MaxTextureSize;
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ImageSize.Height = (u32)(Driver->MaxTextureSize/ratio);
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}
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else if (ImageSize.Height>Driver->MaxTextureSize)
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{
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ImageSize.Height = Driver->MaxTextureSize;
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ImageSize.Width = (u32)(Driver->MaxTextureSize*ratio);
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}
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TextureSize=ImageSize.getOptimalSize(!Driver->queryFeature(EVDF_TEXTURE_NPOT));
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ColorFormat = getBestColorFormat(image->getColorFormat());
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}
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//! copies the the texture into an open gl texture.
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void COpenGLTexture::uploadTexture(bool newTexture, void* mipmapData, u32 level)
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{
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// check which image needs to be uploaded
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IImage* image = level?MipImage:Image;
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if (!image)
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{
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os::Printer::log("No image for OpenGL texture to upload", ELL_ERROR);
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return;
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}
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// get correct opengl color data values
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GLenum oldInternalFormat = InternalFormat;
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GLint filtering;
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InternalFormat = getOpenGLFormatAndParametersFromColorFormat(ColorFormat, filtering, PixelFormat, PixelType);
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// make sure we don't change the internal format of existing images
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if (!newTexture)
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InternalFormat=oldInternalFormat;
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Driver->setActiveTexture(0, this);
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if (Driver->testGLError())
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os::Printer::log("Could not bind Texture", ELL_ERROR);
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// mipmap handling for main texture
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if (!level && newTexture)
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{
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#ifndef DISABLE_MIPMAPPING
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#ifdef GL_SGIS_generate_mipmap
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// auto generate if possible and no mipmap data is given
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if (HasMipMaps && !mipmapData && Driver->queryFeature(EVDF_MIP_MAP_AUTO_UPDATE))
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{
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if (Driver->getTextureCreationFlag(ETCF_OPTIMIZED_FOR_SPEED) && !useCoreContext)
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glHint(GL_GENERATE_MIPMAP_HINT_SGIS, GL_FASTEST);
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else if (Driver->getTextureCreationFlag(ETCF_OPTIMIZED_FOR_QUALITY) && !useCoreContext)
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glHint(GL_GENERATE_MIPMAP_HINT_SGIS, GL_NICEST);
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else if (!useCoreContext)
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glHint(GL_GENERATE_MIPMAP_HINT_SGIS, GL_DONT_CARE);
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AutomaticMipmapUpdate=true;
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if (!Driver->queryFeature(EVDF_FRAMEBUFFER_OBJECT))
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{
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glTexParameteri( GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE );
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MipmapLegacyMode=true;
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}
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else
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MipmapLegacyMode=false;
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}
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else
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#endif
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{
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// Either generate manually due to missing capability
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// or use predefined mipmap data
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AutomaticMipmapUpdate=false;
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regenerateMipMapLevels(mipmapData);
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}
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if (HasMipMaps) // might have changed in regenerateMipMapLevels
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{
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// enable bilinear mipmap filter
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glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST );
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glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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}
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else
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#else
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HasMipMaps=false;
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os::Printer::log("Did not create OpenGL texture mip maps.", ELL_INFORMATION);
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#endif
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{
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// enable bilinear filter without mipmaps
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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}
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}
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// now get image data and upload to GPU
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void* source = image->lock();
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if (newTexture)
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glTexImage2D(GL_TEXTURE_2D, level, InternalFormat, image->getDimension().Width,
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image->getDimension().Height, 0, PixelFormat, PixelType, source);
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else
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glTexSubImage2D(GL_TEXTURE_2D, level, 0, 0, image->getDimension().Width,
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image->getDimension().Height, PixelFormat, PixelType, source);
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image->unlock();
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if (!MipmapLegacyMode && AutomaticMipmapUpdate)
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{
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if (!useCoreContext)
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glEnable(GL_TEXTURE_2D);
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Driver->extGlGenerateMipmap(GL_TEXTURE_2D);
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}
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if (Driver->testGLError())
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os::Printer::log("Could not glTexImage2D", ELL_ERROR);
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}
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//! lock function
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void* COpenGLTexture::lock(E_TEXTURE_LOCK_MODE mode, u32 mipmapLevel)
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{
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// store info about which image is locked
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IImage* image = (mipmapLevel==0)?Image:MipImage;
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ReadOnlyLock |= (mode==ETLM_READ_ONLY);
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MipLevelStored = mipmapLevel;
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if (!ReadOnlyLock && mipmapLevel)
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{
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#ifdef GL_SGIS_generate_mipmap
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if (Driver->queryFeature(EVDF_MIP_MAP_AUTO_UPDATE))
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{
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// do not automatically generate and update mipmaps
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glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_FALSE);
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}
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#endif
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AutomaticMipmapUpdate=false;
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}
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// if data not available or might have changed on GPU download it
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if (!image || IsRenderTarget)
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{
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// prepare the data storage if necessary
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if (!image)
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{
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if (mipmapLevel)
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{
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u32 i=0;
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u32 width = TextureSize.Width;
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u32 height = TextureSize.Height;
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do
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{
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if (width>1)
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width>>=1;
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if (height>1)
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height>>=1;
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++i;
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}
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while (i != mipmapLevel);
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MipImage = image = Driver->createImage(ECF_A8R8G8B8, core::dimension2du(width,height));
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}
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else
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Image = image = Driver->createImage(ECF_A8R8G8B8, ImageSize);
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ColorFormat = ECF_A8R8G8B8;
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}
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if (!image)
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return 0;
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if (mode != ETLM_WRITE_ONLY)
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{
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u8* pixels = static_cast<u8*>(image->lock());
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if (!pixels)
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return 0;
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// we need to keep the correct texture bound later on
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GLint tmpTexture;
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glGetIntegerv(GL_TEXTURE_BINDING_2D, &tmpTexture);
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glBindTexture(GL_TEXTURE_2D, TextureName);
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// we need to flip textures vertical
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// however, it seems that this does not hold for mipmap
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// textures, for unknown reasons.
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// allows to read pixels in top-to-bottom order
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#ifdef GL_MESA_pack_invert
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if (!mipmapLevel && Driver->queryOpenGLFeature(COpenGLExtensionHandler::IRR_MESA_pack_invert))
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glPixelStorei(GL_PACK_INVERT_MESA, GL_TRUE);
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#endif
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// download GPU data as ARGB8 to pixels;
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glGetTexImage(GL_TEXTURE_2D, mipmapLevel, GL_BGRA_EXT, GL_UNSIGNED_BYTE, pixels);
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if (!mipmapLevel)
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{
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#ifdef GL_MESA_pack_invert
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if (Driver->queryOpenGLFeature(COpenGLExtensionHandler::IRR_MESA_pack_invert))
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glPixelStorei(GL_PACK_INVERT_MESA, GL_FALSE);
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else
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#endif
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{
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// opengl images are horizontally flipped, so we have to fix that here.
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const s32 pitch=image->getPitch();
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u8* p2 = pixels + (image->getDimension().Height - 1) * pitch;
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u8* tmpBuffer = new u8[pitch];
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for (u32 i=0; i < image->getDimension().Height; i += 2)
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{
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memcpy(tmpBuffer, pixels, pitch);
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memcpy(pixels, p2, pitch);
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memcpy(p2, tmpBuffer, pitch);
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pixels += pitch;
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p2 -= pitch;
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}
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delete [] tmpBuffer;
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}
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}
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image->unlock();
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//reset old bound texture
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glBindTexture(GL_TEXTURE_2D, tmpTexture);
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}
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}
|
|
return image->lock();
|
|
}
|
|
|
|
|
|
//! unlock function
|
|
void COpenGLTexture::unlock()
|
|
{
|
|
// test if miplevel or main texture was locked
|
|
IImage* image = MipImage?MipImage:Image;
|
|
if (!image)
|
|
return;
|
|
// unlock image to see changes
|
|
image->unlock();
|
|
// copy texture data to GPU
|
|
if (!ReadOnlyLock)
|
|
uploadTexture(false, 0, MipLevelStored);
|
|
ReadOnlyLock = false;
|
|
// cleanup local image
|
|
if (MipImage)
|
|
{
|
|
MipImage->drop();
|
|
MipImage=0;
|
|
}
|
|
else if (!KeepImage)
|
|
{
|
|
Image->drop();
|
|
Image=0;
|
|
}
|
|
// update information
|
|
if (Image)
|
|
ColorFormat=Image->getColorFormat();
|
|
else
|
|
ColorFormat=ECF_A8R8G8B8;
|
|
}
|
|
|
|
|
|
//! Returns size of the original image.
|
|
const core::dimension2d<u32>& COpenGLTexture::getOriginalSize() const
|
|
{
|
|
return ImageSize;
|
|
}
|
|
|
|
|
|
//! Returns size of the texture.
|
|
const core::dimension2d<u32>& COpenGLTexture::getSize() const
|
|
{
|
|
return TextureSize;
|
|
}
|
|
|
|
|
|
//! returns driver type of texture, i.e. the driver, which created the texture
|
|
E_DRIVER_TYPE COpenGLTexture::getDriverType() const
|
|
{
|
|
return EDT_OPENGL;
|
|
}
|
|
|
|
|
|
//! returns color format of texture
|
|
ECOLOR_FORMAT COpenGLTexture::getColorFormat() const
|
|
{
|
|
return ColorFormat;
|
|
}
|
|
|
|
|
|
//! returns pitch of texture (in bytes)
|
|
u32 COpenGLTexture::getPitch() const
|
|
{
|
|
if (Image)
|
|
return Image->getPitch();
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
|
|
//! return open gl texture name
|
|
GLuint COpenGLTexture::getOpenGLTextureName() const
|
|
{
|
|
return TextureName;
|
|
}
|
|
|
|
|
|
//! Returns whether this texture has mipmaps
|
|
bool COpenGLTexture::hasMipMaps() const
|
|
{
|
|
return HasMipMaps;
|
|
}
|
|
|
|
|
|
//! Regenerates the mip map levels of the texture. Useful after locking and
|
|
//! modifying the texture
|
|
void COpenGLTexture::regenerateMipMapLevels(void* mipmapData)
|
|
{
|
|
if (AutomaticMipmapUpdate || !HasMipMaps || !Image)
|
|
return;
|
|
if ((Image->getDimension().Width==1) && (Image->getDimension().Height==1))
|
|
return;
|
|
|
|
// Manually create mipmaps or use prepared version
|
|
u32 width=Image->getDimension().Width;
|
|
u32 height=Image->getDimension().Height;
|
|
u32 i=0;
|
|
u8* target = static_cast<u8*>(mipmapData);
|
|
do
|
|
{
|
|
if (width>1)
|
|
width>>=1;
|
|
if (height>1)
|
|
height>>=1;
|
|
++i;
|
|
if (!target)
|
|
target = new u8[width*height*Image->getBytesPerPixel()];
|
|
// create scaled version if no mipdata available
|
|
if (!mipmapData)
|
|
Image->copyToScaling(target, width, height, Image->getColorFormat());
|
|
glTexImage2D(GL_TEXTURE_2D, i, InternalFormat, width, height,
|
|
0, PixelFormat, PixelType, target);
|
|
// get next prepared mipmap data if available
|
|
if (mipmapData)
|
|
{
|
|
mipmapData = static_cast<u8*>(mipmapData)+width*height*Image->getBytesPerPixel();
|
|
target = static_cast<u8*>(mipmapData);
|
|
}
|
|
}
|
|
while (width!=1 || height!=1);
|
|
// cleanup
|
|
if (!mipmapData)
|
|
delete [] target;
|
|
}
|
|
|
|
|
|
bool COpenGLTexture::isRenderTarget() const
|
|
{
|
|
return IsRenderTarget;
|
|
}
|
|
|
|
|
|
void COpenGLTexture::setIsRenderTarget(bool isTarget)
|
|
{
|
|
IsRenderTarget = isTarget;
|
|
}
|
|
|
|
|
|
bool COpenGLTexture::isFrameBufferObject() const
|
|
{
|
|
return false;
|
|
}
|
|
|
|
|
|
//! Bind Render Target Texture
|
|
void COpenGLTexture::bindRTT()
|
|
{
|
|
}
|
|
|
|
|
|
//! Unbind Render Target Texture
|
|
void COpenGLTexture::unbindRTT()
|
|
{
|
|
Driver->setActiveTexture(0, this);
|
|
|
|
// Copy Our ViewPort To The Texture
|
|
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, getSize().Width, getSize().Height);
|
|
}
|
|
|
|
|
|
/* FBO Textures */
|
|
|
|
// helper function for render to texture
|
|
static bool checkFBOStatus(COpenGLDriver* Driver);
|
|
|
|
//! RTT ColorFrameBuffer constructor
|
|
COpenGLFBOTexture::COpenGLFBOTexture(const core::dimension2d<u32>& size,
|
|
const io::path& name, COpenGLDriver* driver,
|
|
ECOLOR_FORMAT format)
|
|
: COpenGLTexture(name, driver), DepthTexture(0), ColorFrameBuffer(0)
|
|
{
|
|
#ifdef _DEBUG
|
|
setDebugName("COpenGLTexture_FBO");
|
|
#endif
|
|
|
|
ImageSize = size;
|
|
TextureSize = size;
|
|
|
|
if (ECF_UNKNOWN == format)
|
|
format = getBestColorFormat(driver->getColorFormat());
|
|
|
|
ColorFormat = format;
|
|
|
|
GLint FilteringType;
|
|
InternalFormat = getOpenGLFormatAndParametersFromColorFormat(format, FilteringType, PixelFormat, PixelType);
|
|
|
|
HasMipMaps = false;
|
|
IsRenderTarget = true;
|
|
|
|
#ifdef GL_EXT_framebuffer_object
|
|
// generate frame buffer
|
|
Driver->extGlGenFramebuffers(1, &ColorFrameBuffer);
|
|
bindRTT();
|
|
|
|
// generate color texture
|
|
glGenTextures(1, &TextureName);
|
|
Driver->setActiveTexture(0, this);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, FilteringType);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
|
|
glTexImage2D(GL_TEXTURE_2D, 0, InternalFormat, ImageSize.Width,
|
|
ImageSize.Height, 0, PixelFormat, PixelType, 0);
|
|
#ifdef _DEBUG
|
|
driver->testGLError();
|
|
#endif
|
|
|
|
// attach color texture to frame buffer
|
|
Driver->extGlFramebufferTexture2D(GL_FRAMEBUFFER_EXT,
|
|
GL_COLOR_ATTACHMENT0_EXT,
|
|
GL_TEXTURE_2D,
|
|
TextureName,
|
|
0);
|
|
#ifdef _DEBUG
|
|
checkFBOStatus(Driver);
|
|
#endif
|
|
|
|
#endif
|
|
unbindRTT();
|
|
}
|
|
|
|
|
|
//! destructor
|
|
COpenGLFBOTexture::~COpenGLFBOTexture()
|
|
{
|
|
if (DepthTexture)
|
|
if (DepthTexture->drop())
|
|
Driver->removeDepthTexture(DepthTexture);
|
|
if (ColorFrameBuffer)
|
|
Driver->extGlDeleteFramebuffers(1, &ColorFrameBuffer);
|
|
}
|
|
|
|
|
|
bool COpenGLFBOTexture::isFrameBufferObject() const
|
|
{
|
|
return true;
|
|
}
|
|
|
|
|
|
//! Bind Render Target Texture
|
|
void COpenGLFBOTexture::bindRTT()
|
|
{
|
|
#ifdef GL_EXT_framebuffer_object
|
|
if (ColorFrameBuffer != 0)
|
|
Driver->extGlBindFramebuffer(GL_FRAMEBUFFER_EXT, ColorFrameBuffer);
|
|
glDrawBuffer(GL_COLOR_ATTACHMENT0_EXT);
|
|
#endif
|
|
}
|
|
|
|
|
|
//! Unbind Render Target Texture
|
|
void COpenGLFBOTexture::unbindRTT()
|
|
{
|
|
#ifdef GL_EXT_framebuffer_object
|
|
if (ColorFrameBuffer != 0)
|
|
Driver->extGlBindFramebuffer(GL_FRAMEBUFFER_EXT, 0);
|
|
#endif
|
|
}
|
|
|
|
|
|
/* FBO Depth Textures */
|
|
|
|
//! RTT DepthBuffer constructor
|
|
COpenGLFBODepthTexture::COpenGLFBODepthTexture(
|
|
const core::dimension2d<u32>& size,
|
|
const io::path& name,
|
|
COpenGLDriver* driver,
|
|
bool useStencil)
|
|
: COpenGLTexture(name, driver), DepthRenderBuffer(0),
|
|
StencilRenderBuffer(0), UseStencil(useStencil)
|
|
{
|
|
#ifdef _DEBUG
|
|
setDebugName("COpenGLTextureFBO_Depth");
|
|
#endif
|
|
|
|
ImageSize = size;
|
|
TextureSize = size;
|
|
InternalFormat = GL_RGBA;
|
|
PixelFormat = GL_RGBA;
|
|
PixelType = GL_UNSIGNED_BYTE;
|
|
HasMipMaps = false;
|
|
|
|
if (useStencil)
|
|
{
|
|
glGenTextures(1, &DepthRenderBuffer);
|
|
glBindTexture(GL_TEXTURE_2D, DepthRenderBuffer);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_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);
|
|
#ifdef GL_EXT_packed_depth_stencil
|
|
if (Driver->queryOpenGLFeature(COpenGLExtensionHandler::IRR_EXT_packed_depth_stencil))
|
|
{
|
|
// generate packed depth stencil texture
|
|
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_STENCIL_EXT, ImageSize.Width,
|
|
ImageSize.Height, 0, GL_DEPTH_STENCIL_EXT, GL_UNSIGNED_INT_24_8_EXT, 0);
|
|
StencilRenderBuffer = DepthRenderBuffer; // stencil is packed with depth
|
|
}
|
|
else // generate separate stencil and depth textures
|
|
#endif
|
|
{
|
|
// generate depth texture
|
|
glTexImage2D(GL_TEXTURE_2D, 0, Driver->getZBufferBits(), ImageSize.Width,
|
|
ImageSize.Height, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, 0);
|
|
|
|
// generate stencil texture
|
|
glGenTextures(1, &StencilRenderBuffer);
|
|
glBindTexture(GL_TEXTURE_2D, StencilRenderBuffer);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
|
|
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
|
|
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
|
|
glTexImage2D(GL_TEXTURE_2D, 0, GL_STENCIL_INDEX, ImageSize.Width,
|
|
ImageSize.Height, 0, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, 0);
|
|
}
|
|
}
|
|
#ifdef GL_EXT_framebuffer_object
|
|
else
|
|
{
|
|
// generate depth buffer
|
|
Driver->extGlGenRenderbuffers(1, &DepthRenderBuffer);
|
|
Driver->extGlBindRenderbuffer(GL_RENDERBUFFER_EXT, DepthRenderBuffer);
|
|
Driver->extGlRenderbufferStorage(GL_RENDERBUFFER_EXT,
|
|
Driver->getZBufferBits(), ImageSize.Width,
|
|
ImageSize.Height);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
|
|
//! destructor
|
|
COpenGLFBODepthTexture::~COpenGLFBODepthTexture()
|
|
{
|
|
if (DepthRenderBuffer && UseStencil)
|
|
glDeleteTextures(1, &DepthRenderBuffer);
|
|
else
|
|
Driver->extGlDeleteRenderbuffers(1, &DepthRenderBuffer);
|
|
if (StencilRenderBuffer && StencilRenderBuffer != DepthRenderBuffer)
|
|
glDeleteTextures(1, &StencilRenderBuffer);
|
|
}
|
|
|
|
|
|
//combine depth texture and rtt
|
|
bool COpenGLFBODepthTexture::attach(ITexture* renderTex)
|
|
{
|
|
if (!renderTex)
|
|
return false;
|
|
video::COpenGLFBOTexture* rtt = static_cast<video::COpenGLFBOTexture*>(renderTex);
|
|
rtt->bindRTT();
|
|
#ifdef GL_EXT_framebuffer_object
|
|
if (UseStencil)
|
|
{
|
|
// attach depth stencil texture to depth buffer
|
|
Driver->extGlFramebufferTexture2D(GL_FRAMEBUFFER_EXT,
|
|
GL_DEPTH_STENCIL_ATTACHMENT,
|
|
GL_TEXTURE_2D,
|
|
DepthRenderBuffer,
|
|
0);
|
|
}
|
|
else
|
|
{
|
|
// attach depth renderbuffer to depth buffer
|
|
Driver->extGlFramebufferRenderbuffer(GL_FRAMEBUFFER_EXT,
|
|
GL_DEPTH_ATTACHMENT_EXT,
|
|
GL_RENDERBUFFER_EXT,
|
|
DepthRenderBuffer);
|
|
}
|
|
#endif
|
|
// check the status
|
|
if (!checkFBOStatus(Driver))
|
|
{
|
|
os::Printer::log("FBO incomplete");
|
|
return false;
|
|
}
|
|
rtt->DepthTexture=this;
|
|
rtt->DepthBufferTexture = DepthRenderBuffer;
|
|
grab(); // grab the depth buffer, not the RTT
|
|
rtt->unbindRTT();
|
|
return true;
|
|
}
|
|
|
|
|
|
//! Bind Render Target Texture
|
|
void COpenGLFBODepthTexture::bindRTT()
|
|
{
|
|
}
|
|
|
|
|
|
//! Unbind Render Target Texture
|
|
void COpenGLFBODepthTexture::unbindRTT()
|
|
{
|
|
}
|
|
|
|
bool COpenGLFBODepthTexture::hasStencil()
|
|
{
|
|
return UseStencil;
|
|
}
|
|
|
|
|
|
bool checkFBOStatus(COpenGLDriver* Driver)
|
|
{
|
|
#ifdef GL_EXT_framebuffer_object
|
|
GLenum status = Driver->extGlCheckFramebufferStatus(GL_FRAMEBUFFER_EXT);
|
|
|
|
switch (status)
|
|
{
|
|
//Our FBO is perfect, return true
|
|
case GL_FRAMEBUFFER_COMPLETE_EXT:
|
|
return true;
|
|
|
|
case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT:
|
|
os::Printer::log("FBO has invalid read buffer", ELL_ERROR);
|
|
break;
|
|
|
|
case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT:
|
|
os::Printer::log("FBO has invalid draw buffer", ELL_ERROR);
|
|
break;
|
|
|
|
case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT:
|
|
os::Printer::log("FBO has one or several incomplete image attachments", ELL_ERROR);
|
|
break;
|
|
|
|
case GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT:
|
|
os::Printer::log("FBO has one or several image attachments with different internal formats", ELL_ERROR);
|
|
break;
|
|
|
|
case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT:
|
|
os::Printer::log("FBO has one or several image attachments with different dimensions", ELL_ERROR);
|
|
break;
|
|
|
|
// not part of fbo_object anymore, but won't harm as it is just a return value
|
|
#ifdef GL_FRAMEBUFFER_INCOMPLETE_DUPLICATE_ATTACHMENT_EXT
|
|
case GL_FRAMEBUFFER_INCOMPLETE_DUPLICATE_ATTACHMENT_EXT:
|
|
os::Printer::log("FBO has a duplicate image attachment", ELL_ERROR);
|
|
break;
|
|
#endif
|
|
|
|
case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT:
|
|
os::Printer::log("FBO missing an image attachment", ELL_ERROR);
|
|
break;
|
|
|
|
#ifdef GL_EXT_framebuffer_multisample
|
|
case GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE_EXT:
|
|
os::Printer::log("FBO wrong multisample setup", ELL_ERROR);
|
|
break;
|
|
#endif
|
|
|
|
case GL_FRAMEBUFFER_UNSUPPORTED_EXT:
|
|
os::Printer::log("FBO format unsupported", ELL_ERROR);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
#endif
|
|
os::Printer::log("FBO error", ELL_ERROR);
|
|
// _IRR_DEBUG_BREAK_IF(true);
|
|
return false;
|
|
}
|
|
|
|
|
|
} // end namespace video
|
|
} // end namespace irr
|
|
|
|
#endif // _IRR_COMPILE_WITH_OPENGL_
|
|
|