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78c4e836b1
Graphic3d_RenderTransparentMethod has been extended by Graphic3d_RTM_DEPTH_PEELING_OIT, which is handled by OpenGl_LayerList::renderTransparent(). OpenGl_FrameBuffer::Init() now does not silently ignore unknown color attachment format and return failure. OpenGl_FrameBuffer::InitWrapper() - added constructor wrapping existing color textures. v3d/transparency/oit: test case added
537 lines
15 KiB
C++
537 lines
15 KiB
C++
// Copyright (c) 2017-2019 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#include <OpenGl_TextureFormat.hxx>
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#include <Image_SupportedFormats.hxx>
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#include <OpenGl_Context.hxx>
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// =======================================================================
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// function : FindFormat
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// purpose :
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// =======================================================================
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OpenGl_TextureFormat OpenGl_TextureFormat::FindFormat (const Handle(OpenGl_Context)& theCtx,
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Image_Format theFormat,
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bool theIsColorMap)
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{
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OpenGl_TextureFormat aFormat;
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switch (theFormat)
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{
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case Image_Format_GrayF:
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{
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aFormat.SetNbComponents (1);
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if (theCtx->core11 == NULL)
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{
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aFormat.SetInternalFormat (theCtx->arbTexFloat ? GL_R32F : GL_R8);
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aFormat.SetPixelFormat (GL_RED);
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}
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else
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{
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#if !defined(GL_ES_VERSION_2_0)
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aFormat.SetInternalFormat (GL_LUMINANCE8);
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#else
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aFormat.SetInternalFormat (GL_LUMINANCE);
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#endif
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aFormat.SetPixelFormat (GL_LUMINANCE);
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}
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aFormat.SetDataType (GL_FLOAT);
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return aFormat;
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}
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case Image_Format_AlphaF:
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{
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aFormat.SetNbComponents (1);
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if (theCtx->core11 == NULL)
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{
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aFormat.SetInternalFormat (theCtx->arbTexFloat ? GL_R32F : GL_R8);
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aFormat.SetPixelFormat (GL_RED);
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}
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else
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{
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#if !defined(GL_ES_VERSION_2_0)
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aFormat.SetInternalFormat (GL_ALPHA8);
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#else
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aFormat.SetInternalFormat (GL_ALPHA);
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#endif
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aFormat.SetPixelFormat (GL_ALPHA);
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}
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aFormat.SetDataType (GL_FLOAT);
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return aFormat;
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}
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case Image_Format_RGF:
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{
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if (!theCtx->arbTexRG)
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{
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return OpenGl_TextureFormat();
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}
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aFormat.SetNbComponents (2);
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aFormat.SetInternalFormat (theCtx->arbTexFloat ? GL_RG32F : GL_RG8);
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aFormat.SetPixelFormat (GL_RG);
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aFormat.SetDataType (GL_FLOAT);
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return aFormat;
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}
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case Image_Format_RGBAF:
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{
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aFormat.SetNbComponents (4);
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aFormat.SetInternalFormat (theCtx->arbTexFloat ? GL_RGBA32F : GL_RGBA8);
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aFormat.SetPixelFormat (GL_RGBA);
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aFormat.SetDataType (GL_FLOAT);
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return aFormat;
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}
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case Image_Format_BGRAF:
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{
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if (!theCtx->IsGlGreaterEqual (1, 2) && !theCtx->extBgra)
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{
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return OpenGl_TextureFormat();
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}
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aFormat.SetNbComponents (4);
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aFormat.SetInternalFormat (theCtx->arbTexFloat ? GL_RGBA32F : GL_RGBA8);
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aFormat.SetPixelFormat (GL_BGRA_EXT); // equals to GL_BGRA
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aFormat.SetDataType (GL_FLOAT);
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return aFormat;
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}
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case Image_Format_RGBF:
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{
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aFormat.SetNbComponents (3);
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aFormat.SetInternalFormat (theCtx->arbTexFloat ? GL_RGB32F : GL_RGB8);
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aFormat.SetPixelFormat (GL_RGB);
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aFormat.SetDataType (GL_FLOAT);
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return aFormat;
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}
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case Image_Format_BGRF:
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{
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#if !defined(GL_ES_VERSION_2_0)
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aFormat.SetNbComponents (3);
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aFormat.SetInternalFormat (theCtx->arbTexFloat ? GL_RGB32F : GL_RGB8);
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aFormat.SetPixelFormat (GL_BGR); // equals to GL_BGR_EXT
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aFormat.SetDataType (GL_FLOAT);
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return aFormat;
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#else
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return OpenGl_TextureFormat();
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#endif
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}
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case Image_Format_RGBA:
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{
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aFormat.SetNbComponents (4);
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aFormat.SetInternalFormat (GL_RGBA8);
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aFormat.SetPixelFormat (GL_RGBA);
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aFormat.SetDataType (GL_UNSIGNED_BYTE);
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if (theIsColorMap
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&& theCtx->ToRenderSRGB())
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{
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aFormat.SetInternalFormat (GL_SRGB8_ALPHA8);
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}
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return aFormat;
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}
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case Image_Format_BGRA:
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{
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#if !defined(GL_ES_VERSION_2_0)
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if (!theCtx->IsGlGreaterEqual (1, 2)
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&& !theCtx->extBgra)
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{
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return OpenGl_TextureFormat();
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}
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aFormat.SetNbComponents (4);
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aFormat.SetInternalFormat (GL_RGBA8);
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if (theIsColorMap
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&& theCtx->ToRenderSRGB())
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{
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aFormat.SetInternalFormat (GL_SRGB8_ALPHA8);
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}
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#else
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if (theIsColorMap
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&& theCtx->ToRenderSRGB())
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{
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// GL_SRGB8_ALPHA8 with texture swizzling would be better
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}
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if (!theCtx->extBgra)
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{
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return OpenGl_TextureFormat();
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}
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aFormat.SetNbComponents (4);
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aFormat.SetInternalFormat (GL_BGRA_EXT);
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#endif
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aFormat.SetPixelFormat (GL_BGRA_EXT); // equals to GL_BGRA
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aFormat.SetDataType (GL_UNSIGNED_BYTE);
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return aFormat;
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}
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case Image_Format_RGB32:
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{
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#if !defined(GL_ES_VERSION_2_0)
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// ask driver to convert data to RGB8 to save memory
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aFormat.SetNbComponents (3);
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aFormat.SetInternalFormat (GL_RGB8);
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if (theIsColorMap
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&& theCtx->ToRenderSRGB())
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{
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aFormat.SetInternalFormat (GL_SRGB8);
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}
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#else
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// conversion is not supported
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aFormat.SetNbComponents (4);
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aFormat.SetInternalFormat (GL_RGBA8);
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if (theIsColorMap
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&& theCtx->ToRenderSRGB())
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{
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aFormat.SetInternalFormat (GL_SRGB8_ALPHA8);
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}
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#endif
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aFormat.SetPixelFormat (GL_RGBA);
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aFormat.SetDataType (GL_UNSIGNED_BYTE);
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return aFormat;
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}
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case Image_Format_BGR32:
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{
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#if !defined(GL_ES_VERSION_2_0)
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if (!theCtx->IsGlGreaterEqual(1, 2) && !theCtx->extBgra)
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{
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return OpenGl_TextureFormat();
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}
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aFormat.SetNbComponents (3);
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aFormat.SetInternalFormat (GL_RGB8);
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if (theIsColorMap
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&& theCtx->ToRenderSRGB())
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{
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aFormat.SetInternalFormat (GL_SRGB8);
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}
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#else
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if (theIsColorMap
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&& theCtx->ToRenderSRGB())
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{
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// GL_SRGB8_ALPHA8 with texture swizzling would be better
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}
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if (!theCtx->extBgra)
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{
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return OpenGl_TextureFormat();
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}
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aFormat.SetNbComponents (4);
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aFormat.SetInternalFormat (GL_BGRA_EXT);
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#endif
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aFormat.SetPixelFormat (GL_BGRA_EXT); // equals to GL_BGRA
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aFormat.SetDataType (GL_UNSIGNED_BYTE);
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return aFormat;
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}
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case Image_Format_RGB:
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{
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aFormat.SetNbComponents (3);
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aFormat.SetInternalFormat (GL_RGB8);
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aFormat.SetPixelFormat (GL_RGB);
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aFormat.SetDataType (GL_UNSIGNED_BYTE);
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if (theIsColorMap
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&& theCtx->ToRenderSRGB())
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{
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aFormat.SetInternalFormat (GL_SRGB8);
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}
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return aFormat;
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}
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case Image_Format_BGR:
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{
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#if !defined(GL_ES_VERSION_2_0)
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if (!theCtx->IsGlGreaterEqual (1, 2)
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&& !theCtx->extBgra)
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{
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return OpenGl_TextureFormat();
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}
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aFormat.SetNbComponents (3);
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aFormat.SetInternalFormat (GL_RGB8);
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if (theIsColorMap
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&& theCtx->ToRenderSRGB())
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{
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aFormat.SetInternalFormat (GL_SRGB8);
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}
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aFormat.SetPixelFormat (GL_BGR); // equals to GL_BGR_EXT
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aFormat.SetDataType (GL_UNSIGNED_BYTE);
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#endif
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return aFormat;
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}
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case Image_Format_Gray:
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{
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aFormat.SetNbComponents (1);
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if (theCtx->core11 == NULL)
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{
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aFormat.SetInternalFormat (GL_R8);
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aFormat.SetPixelFormat (GL_RED);
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}
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else
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{
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#if !defined(GL_ES_VERSION_2_0)
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aFormat.SetInternalFormat (GL_LUMINANCE8);
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#else
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aFormat.SetInternalFormat (GL_LUMINANCE);
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#endif
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aFormat.SetPixelFormat (GL_LUMINANCE);
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}
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aFormat.SetDataType (GL_UNSIGNED_BYTE);
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return aFormat;
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}
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case Image_Format_Alpha:
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{
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aFormat.SetNbComponents (1);
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if (theCtx->core11 == NULL)
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{
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aFormat.SetInternalFormat (GL_R8);
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aFormat.SetPixelFormat (GL_RED);
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}
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else
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{
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#if !defined(GL_ES_VERSION_2_0)
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aFormat.SetInternalFormat (GL_ALPHA8);
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#else
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aFormat.SetInternalFormat (GL_ALPHA);
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#endif
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aFormat.SetPixelFormat (GL_ALPHA);
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}
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aFormat.SetDataType (GL_UNSIGNED_BYTE);
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return aFormat;
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}
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case Image_Format_UNKNOWN:
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{
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return OpenGl_TextureFormat();
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}
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}
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return OpenGl_TextureFormat();
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}
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// =======================================================================
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// function : FindSizedFormat
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// purpose :
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// =======================================================================
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OpenGl_TextureFormat OpenGl_TextureFormat::FindSizedFormat (const Handle(OpenGl_Context)& theCtx,
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GLint theSizedFormat)
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{
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OpenGl_TextureFormat aFormat;
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switch (theSizedFormat)
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{
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case GL_RGBA32F:
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{
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aFormat.SetNbComponents (4);
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aFormat.SetInternalFormat (theSizedFormat);
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aFormat.SetPixelFormat (GL_RGBA);
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aFormat.SetDataType (GL_FLOAT);
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return aFormat;
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}
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case GL_R32F:
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{
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aFormat.SetNbComponents (1);
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aFormat.SetInternalFormat (theSizedFormat);
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aFormat.SetPixelFormat (GL_RED);
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aFormat.SetDataType (GL_FLOAT);
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return aFormat;
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}
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case GL_RG32F:
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{
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aFormat.SetNbComponents (1);
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aFormat.SetInternalFormat (theSizedFormat);
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aFormat.SetPixelFormat (GL_RG);
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aFormat.SetDataType (GL_FLOAT);
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return aFormat;
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}
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case GL_RGBA16F:
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{
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aFormat.SetNbComponents (4);
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aFormat.SetInternalFormat (theSizedFormat);
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aFormat.SetPixelFormat (GL_RGBA);
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aFormat.SetDataType (GL_HALF_FLOAT);
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if (theCtx->hasHalfFloatBuffer == OpenGl_FeatureInExtensions)
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{
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#if defined(GL_ES_VERSION_2_0)
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aFormat.SetDataType (GL_HALF_FLOAT_OES);
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#else
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aFormat.SetDataType (GL_FLOAT);
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#endif
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}
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return aFormat;
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}
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case GL_R16F:
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{
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aFormat.SetNbComponents (1);
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aFormat.SetInternalFormat (theSizedFormat);
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aFormat.SetPixelFormat (GL_RED);
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aFormat.SetDataType (GL_HALF_FLOAT);
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if (theCtx->hasHalfFloatBuffer == OpenGl_FeatureInExtensions)
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{
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#if defined(GL_ES_VERSION_2_0)
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aFormat.SetDataType (GL_HALF_FLOAT_OES);
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#else
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aFormat.SetDataType (GL_FLOAT);
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#endif
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}
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return aFormat;
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}
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case GL_SRGB8_ALPHA8:
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case GL_RGBA8:
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case GL_RGBA:
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{
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aFormat.SetNbComponents (4);
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aFormat.SetInternalFormat (theSizedFormat);
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aFormat.SetPixelFormat (GL_RGBA);
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aFormat.SetDataType (GL_UNSIGNED_BYTE);
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if (theSizedFormat == GL_SRGB8_ALPHA8
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&& !theCtx->ToRenderSRGB())
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{
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aFormat.SetInternalFormat (GL_RGBA8); // fallback format
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}
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return aFormat;
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}
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case GL_SRGB8:
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case GL_RGB8:
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case GL_RGB:
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{
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aFormat.SetNbComponents (3);
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aFormat.SetInternalFormat (theSizedFormat);
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aFormat.SetPixelFormat (GL_RGB);
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aFormat.SetDataType (GL_UNSIGNED_BYTE);
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if (theSizedFormat == GL_SRGB8
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&& !theCtx->ToRenderSRGB())
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{
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aFormat.SetInternalFormat (GL_RGB8); // fallback format
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}
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return aFormat;
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}
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// integer types
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case GL_R32I:
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{
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aFormat.SetNbComponents (1);
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aFormat.SetInternalFormat (theSizedFormat);
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aFormat.SetPixelFormat (GL_RED_INTEGER);
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aFormat.SetDataType (GL_INT);
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return aFormat;
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}
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case GL_RG32I:
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{
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aFormat.SetNbComponents (2);
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aFormat.SetInternalFormat (theSizedFormat);
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aFormat.SetPixelFormat (GL_RG_INTEGER);
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aFormat.SetDataType (GL_INT);
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return aFormat;
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}
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// depth formats
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case GL_DEPTH24_STENCIL8:
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{
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aFormat.SetNbComponents (2);
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aFormat.SetInternalFormat (theSizedFormat);
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aFormat.SetPixelFormat (GL_DEPTH_STENCIL);
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aFormat.SetDataType (GL_UNSIGNED_INT_24_8);
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return aFormat;
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}
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case GL_DEPTH32F_STENCIL8:
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{
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aFormat.SetNbComponents (2);
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aFormat.SetInternalFormat (theSizedFormat);
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aFormat.SetPixelFormat (GL_DEPTH_STENCIL);
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aFormat.SetDataType (GL_FLOAT_32_UNSIGNED_INT_24_8_REV);
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return aFormat;
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}
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case GL_DEPTH_COMPONENT16:
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{
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aFormat.SetNbComponents (1);
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aFormat.SetInternalFormat (theSizedFormat);
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aFormat.SetPixelFormat (GL_DEPTH_COMPONENT);
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aFormat.SetDataType (GL_UNSIGNED_SHORT);
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return aFormat;
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}
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case GL_DEPTH_COMPONENT24:
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{
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aFormat.SetNbComponents (1);
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aFormat.SetInternalFormat (theSizedFormat);
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aFormat.SetPixelFormat (GL_DEPTH_COMPONENT);
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aFormat.SetDataType (GL_UNSIGNED_INT);
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return aFormat;
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}
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case GL_DEPTH_COMPONENT32F:
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{
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aFormat.SetNbComponents (1);
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aFormat.SetInternalFormat (theSizedFormat);
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aFormat.SetPixelFormat (GL_DEPTH_COMPONENT);
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aFormat.SetDataType (GL_FLOAT);
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return aFormat;
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}
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}
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return aFormat;
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}
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// =======================================================================
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// function : FindCompressedFormat
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// purpose :
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// =======================================================================
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OpenGl_TextureFormat OpenGl_TextureFormat::FindCompressedFormat (const Handle(OpenGl_Context)& theCtx,
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Image_CompressedFormat theFormat,
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bool theIsColorMap)
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{
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OpenGl_TextureFormat aFormat;
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if (!theCtx->SupportedTextureFormats()->IsSupported (theFormat))
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{
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return aFormat;
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}
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switch (theFormat)
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{
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case Image_CompressedFormat_UNKNOWN:
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{
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return aFormat;
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}
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case Image_CompressedFormat_RGB_S3TC_DXT1:
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{
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aFormat.SetNbComponents (3);
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aFormat.SetPixelFormat (GL_RGB);
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aFormat.SetDataType (GL_UNSIGNED_BYTE);
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aFormat.SetInternalFormat (GL_COMPRESSED_RGB_S3TC_DXT1_EXT);
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if (theIsColorMap
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&& theCtx->ToRenderSRGB())
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{
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aFormat.SetInternalFormat (GL_COMPRESSED_SRGB_S3TC_DXT1_EXT);
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}
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return aFormat;
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}
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case Image_CompressedFormat_RGBA_S3TC_DXT1:
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{
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aFormat.SetNbComponents (4);
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aFormat.SetPixelFormat (GL_RGBA);
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aFormat.SetDataType (GL_UNSIGNED_BYTE);
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aFormat.SetInternalFormat (GL_COMPRESSED_RGBA_S3TC_DXT1_EXT);
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if (theIsColorMap
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&& theCtx->ToRenderSRGB())
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{
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aFormat.SetInternalFormat (GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT);
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}
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return aFormat;
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}
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case Image_CompressedFormat_RGBA_S3TC_DXT3:
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{
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aFormat.SetNbComponents (4);
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|
aFormat.SetPixelFormat (GL_RGBA);
|
|
aFormat.SetDataType (GL_UNSIGNED_BYTE);
|
|
aFormat.SetInternalFormat (GL_COMPRESSED_RGBA_S3TC_DXT3_EXT);
|
|
if (theIsColorMap
|
|
&& theCtx->ToRenderSRGB())
|
|
{
|
|
aFormat.SetInternalFormat (GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT);
|
|
}
|
|
return aFormat;
|
|
}
|
|
case Image_CompressedFormat_RGBA_S3TC_DXT5:
|
|
{
|
|
aFormat.SetNbComponents (4);
|
|
aFormat.SetPixelFormat (GL_RGBA);
|
|
aFormat.SetDataType (GL_UNSIGNED_BYTE);
|
|
aFormat.SetInternalFormat (GL_COMPRESSED_RGBA_S3TC_DXT5_EXT);
|
|
if (theIsColorMap
|
|
&& theCtx->ToRenderSRGB())
|
|
{
|
|
aFormat.SetInternalFormat (GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT);
|
|
}
|
|
return aFormat;
|
|
}
|
|
}
|
|
return aFormat;
|
|
}
|