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Default framebuffer is now accessible throught defaultFramebuffer global variable, named framebuffers are handled the same way as before. All operations (clear, setViewport, blit, read) now are member functions so they cannot be mistakenly used when unwanted framebuffer is bound. Further rework (DSA, state tracking...) is on the way.pull/7/head
Vladimír Vondruš
14 years ago
9 changed files with 569 additions and 480 deletions
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|
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/*
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Copyright © 2010, 2011, 2012 Vladimír Vondruš <mosra@centrum.cz> |
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|
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This file is part of Magnum. |
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|
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Magnum is free software: you can redistribute it and/or modify |
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it under the terms of the GNU Lesser General Public License version 3 |
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only, as published by the Free Software Foundation. |
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|
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Magnum is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU Lesser General Public License version 3 for more details. |
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*/ |
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#include "AbstractFramebuffer.h" |
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#include "BufferImage.h" |
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#include "Image.h" |
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namespace Magnum { |
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void AbstractFramebuffer::read(const Vector2i& offset, const Vector2i& size, AbstractImage::Format format, AbstractImage::Type type, Image2D* image) { |
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bind(Target::ReadDraw); |
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char* data = new char[AbstractImage::pixelSize(format, type)*size.product()]; |
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glReadPixels(offset.x(), offset.y(), size.x(), size.y(), static_cast<GLenum>(format), static_cast<GLenum>(type), data); |
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image->setData(size, format, type, data); |
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} |
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#ifndef MAGNUM_TARGET_GLES2 |
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void AbstractFramebuffer::read(const Vector2i& offset, const Vector2i& size, AbstractImage::Format format, AbstractImage::Type type, BufferImage2D* image, Buffer::Usage usage) { |
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bind(Target::ReadDraw); |
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/* If the buffer doesn't have sufficient size, resize it */ |
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/** @todo Explicitly reset also when buffer usage changes */ |
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if(image->size() != size || image->format() != format || image->type() != type) |
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image->setData(size, format, type, nullptr, usage); |
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image->buffer()->bind(Buffer::Target::PixelPack); |
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glReadPixels(offset.x(), offset.y(), size.x(), size.y(), static_cast<GLenum>(format), static_cast<GLenum>(type), nullptr); |
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} |
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#endif |
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} |
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#ifndef Magnum_AbstractFramebuffer_h |
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#define Magnum_AbstractFramebuffer_h |
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/*
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Copyright © 2010, 2011, 2012 Vladimír Vondruš <mosra@centrum.cz> |
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|
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This file is part of Magnum. |
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|
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Magnum is free software: you can redistribute it and/or modify |
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it under the terms of the GNU Lesser General Public License version 3 |
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only, as published by the Free Software Foundation. |
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|
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Magnum is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU Lesser General Public License version 3 for more details. |
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*/ |
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|
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/** @file
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* @brief Class Magnum::AbstractFramebuffer |
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*/ |
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#include <Containers/EnumSet.h> |
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#include "Math/Vector2.h" |
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#include "AbstractImage.h" |
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#include "Buffer.h" |
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namespace Magnum { |
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/**
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@brief Base for default and named framebuffers |
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See DefaultFramebuffer and Framebuffer for more information. |
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@todo @extension{ARB,viewport_array} |
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*/ |
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class MAGNUM_EXPORT AbstractFramebuffer { |
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AbstractFramebuffer(const AbstractFramebuffer& other) = delete; |
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AbstractFramebuffer(AbstractFramebuffer&& other) = delete; |
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AbstractFramebuffer& operator=(const AbstractFramebuffer& other) = delete; |
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AbstractFramebuffer& operator=(AbstractFramebuffer&& other) = delete; |
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public: |
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/**
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* @brief Mask for clearing |
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* |
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* @see ClearMask |
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*/ |
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enum class Clear: GLbitfield { |
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Color = GL_COLOR_BUFFER_BIT, /**< Color */ |
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Depth = GL_DEPTH_BUFFER_BIT, /**< Depth value */ |
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Stencil = GL_STENCIL_BUFFER_BIT /**< Stencil value */ |
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}; |
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/**
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* @brief Mask for clearing |
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* |
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* @see clear() |
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*/ |
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typedef Corrade::Containers::EnumSet<Clear, GLbitfield, |
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GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT|GL_STENCIL_BUFFER_BIT> ClearMask; |
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/**
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* @brief Mask for blitting |
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* |
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* @see BlitMask |
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* @requires_gl30 %Extension @extension{EXT,framebuffer_object} |
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* @requires_gles30 %Extension @es_extension{ANGLE,framebuffer_blit} |
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*/ |
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enum class Blit: GLbitfield { |
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ColorBuffer = GL_COLOR_BUFFER_BIT, /**< Color buffer */ |
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DepthBuffer = GL_DEPTH_BUFFER_BIT, /**< Depth buffer */ |
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StencilBuffer = GL_STENCIL_BUFFER_BIT /**< Stencil buffer */ |
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}; |
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/**
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* @brief Mask for blitting |
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* |
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* @see blit() |
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* @requires_gl30 %Extension @extension{EXT,framebuffer_object} |
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* @requires_gles30 %Extension @es_extension{ANGLE,framebuffer_blit} |
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*/ |
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typedef Corrade::Containers::EnumSet<Blit, GLbitfield, |
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GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT|GL_STENCIL_BUFFER_BIT> BlitMask; |
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/**
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* @brief Blit filtering |
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* |
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* @see blit() |
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*/ |
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enum class BlitFilter: GLenum { |
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NearestNeighbor = GL_NEAREST, /**< Nearest neighbor filtering */ |
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LinearInterpolation = GL_LINEAR /**< Linear interpolation filtering */ |
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}; |
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/**
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* @brief Target for binding framebuffer |
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* |
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* @see DefaultFramebuffer::bind(), Framebuffer::bind() |
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* @requires_gl30 %Extension @extension{EXT,framebuffer_object} |
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*/ |
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enum class Target: GLenum { |
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/**
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* For reading only. |
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* @requires_gl30 %Extension @extension{EXT,framebuffer_blit} |
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* @requires_gles30 %Extension @es_extension{APPLE,framebuffer_multisample} |
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* or @es_extension{ANGLE,framebuffer_blit} |
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*/ |
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#ifndef MAGNUM_TARGET_GLES2 |
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Read = GL_READ_FRAMEBUFFER, |
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#else |
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Read = GL_READ_FRAMEBUFFER_APPLE, |
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#endif |
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/**
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* For drawing only. |
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* @requires_gl30 %Extension @extension{EXT,framebuffer_blit} |
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* @requires_gles30 %Extension @es_extension{APPLE,framebuffer_multisample} |
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* or @es_extension{ANGLE,framebuffer_blit} |
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*/ |
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#ifndef MAGNUM_TARGET_GLES2 |
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Draw = GL_DRAW_FRAMEBUFFER, |
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#else |
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Draw = GL_DRAW_FRAMEBUFFER_APPLE, |
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#endif |
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ReadDraw = GL_FRAMEBUFFER /**< For both reading and drawing. */ |
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}; |
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/**
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* @brief Copy block of pixels |
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* @param source Source framebuffer |
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* @param destination Destination framebuffer |
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* @param sourceBottomLeft Bottom left coordinates of source rectangle |
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* @param sourceTopRight Top right coordinates of source rectangle |
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* @param destinationBottomLeft Bottom left coordinates of destination rectangle |
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* @param destinationTopRight Top right coordinates of destination |
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* rectangle |
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* @param mask Which buffers to perform blit operation on |
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* @param filter Interpolation filter |
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* |
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* Binds @p source framebuffer to @ref Target "Target::Read" and |
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* @p destination framebuffer to @ref Target "Target::Draw" and |
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* performs blitting operation. See DefaultFramebuffer::mapForRead(), |
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* Framebuffer::mapForRead(), DefaultFramebuffer::mapForDraw() and |
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* Framebuffer::mapForDraw() for specifying particular buffers for |
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* blitting operation. |
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* @see @fn_gl{BlitFramebuffer} |
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* @requires_gl30 %Extension @extension{EXT,framebuffer_blit} |
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* @requires_gles30 %Extension @es_extension{ANGLE,framebuffer_blit} |
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*/ |
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inline static void blit(AbstractFramebuffer& source, AbstractFramebuffer& destination, const Vector2i& sourceBottomLeft, const Vector2i& sourceTopRight, const Vector2i& destinationBottomLeft, const Vector2i& destinationTopRight, BlitMask mask, BlitFilter filter) { |
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source.bind(AbstractFramebuffer::Target::Read); |
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destination.bind(AbstractFramebuffer::Target::Draw); |
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/** @todo Get some extension wrangler instead to avoid undeclared glBlitFramebuffer() on ES2 */ |
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#ifndef MAGNUM_TARGET_GLES2 |
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glBlitFramebuffer(sourceBottomLeft.x(), sourceBottomLeft.y(), sourceTopRight.x(), sourceTopRight.y(), destinationBottomLeft.x(), destinationBottomLeft.y(), destinationTopRight.x(), destinationTopRight.y(), static_cast<GLbitfield>(mask), static_cast<GLenum>(filter)); |
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#else |
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static_cast<void>(sourceBottomLeft); |
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static_cast<void>(sourceTopRight); |
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static_cast<void>(destinationBottomLeft); |
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static_cast<void>(destinationTopRight); |
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static_cast<void>(mask); |
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static_cast<void>(filter); |
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#endif |
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} |
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/**
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* @brief Copy block of pixels |
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* @param source Source framebuffer |
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* @param destination Destination framebuffer |
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* @param bottomLeft Bottom left coordinates of source and |
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* destination rectangle |
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* @param topRight Top right coordinates of source and |
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* destination rectangle |
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* @param mask Which buffers to perform blit operation on |
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* |
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* Convenience alternative to above function when source rectangle is |
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* the same as destination rectangle. As the image is copied |
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* pixel-by-pixel, no interpolation is needed and thus |
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* @ref BlitFilter "BlitFilter::NearestNeighbor" filtering is used by |
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* default. |
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* @see @fn_gl{BlitFramebuffer} |
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* @requires_gl30 %Extension @extension{EXT,framebuffer_blit} |
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* @requires_gles30 %Extension @es_extension{ANGLE,framebuffer_blit} |
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*/ |
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inline static void blit(AbstractFramebuffer& source, AbstractFramebuffer& destination, const Vector2i& bottomLeft, const Vector2i& topRight, BlitMask mask) { |
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blit(source, destination, bottomLeft, topRight, bottomLeft, topRight, mask, BlitFilter::NearestNeighbor); |
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} |
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AbstractFramebuffer() = default; |
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virtual ~AbstractFramebuffer() = 0; |
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/**
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* @brief Bind framebuffer |
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* |
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* @see DefaultFramebuffer::mapForRead(), Framebuffer::mapForRead(), |
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* DefaultFramebuffer::mapForDraw(), Framebuffer::mapForDraw(), |
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* @fn_gl{BindFramebuffer} |
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*/ |
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inline void bind(Target target) { |
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glBindFramebuffer(static_cast<GLenum>(target), _id); |
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} |
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/**
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* @brief Set viewport size |
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* |
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* Call when window size changes. |
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* @see @fn_gl{Viewport} |
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*/ |
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inline void setViewport(const Vector2i& position, const Vector2i& size) { |
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bind(Target::ReadDraw); |
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glViewport(position.x(), position.y(), size.x(), size.y()); |
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} |
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/**
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* @brief Clear specified buffers in framebuffer |
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* @param mask Which buffers to clear |
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* |
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* @see Renderer::setClearColor(), Renderer::setClearDepth(), |
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* Renderer::setClearStencil(), @fn_gl{Clear} |
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*/ |
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inline void clear(ClearMask mask) { |
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bind(Target::ReadDraw); |
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glClear(static_cast<GLbitfield>(mask)); |
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} |
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/**
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* @brief Read block of pixels from framebuffer to image |
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* @param offset Offset in the framebuffer |
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* @param size %Image size |
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* @param format Format of pixel data |
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* @param type Data type of pixel data |
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* @param image %Image where to put the data |
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* |
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* @see @fn_gl{ReadPixels} |
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*/ |
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void read(const Vector2i& offset, const Vector2i& size, AbstractImage::Format format, AbstractImage::Type type, Image2D* image); |
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#ifndef MAGNUM_TARGET_GLES2 |
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/**
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* @brief Read block of pixels from framebuffer to buffer image |
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* @param offset Offset in the framebuffer |
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* @param size %Image size |
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* @param format Format of pixel data |
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* @param type Data type of pixel data |
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* @param image %Buffer image where to put the data |
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* @param usage %Buffer usage |
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* |
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* @see Buffer::bind(Target), @fn_gl{ReadPixels} |
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* @requires_gles30 Pixel buffer objects are not available in OpenGL ES 2.0. |
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*/ |
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void read(const Vector2i& offset, const Vector2i& size, AbstractImage::Format format, AbstractImage::Type type, BufferImage2D* image, Buffer::Usage usage); |
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#endif |
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#ifndef DOXYGEN_GENERATING_OUTPUT |
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protected: |
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GLuint _id; |
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#endif |
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}; |
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inline AbstractFramebuffer::~AbstractFramebuffer() {} |
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CORRADE_ENUMSET_OPERATORS(AbstractFramebuffer::ClearMask) |
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#ifndef MAGNUM_TARGET_GLES |
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CORRADE_ENUMSET_OPERATORS(AbstractFramebuffer::BlitMask) |
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#endif |
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} |
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#endif |
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@ -0,0 +1,36 @@
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/*
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Copyright © 2010, 2011, 2012 Vladimír Vondruš <mosra@centrum.cz> |
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|
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This file is part of Magnum. |
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|
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Magnum is free software: you can redistribute it and/or modify |
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it under the terms of the GNU Lesser General Public License version 3 |
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only, as published by the Free Software Foundation. |
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|
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Magnum is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU Lesser General Public License version 3 for more details. |
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*/ |
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#include "DefaultFramebuffer.h" |
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namespace Magnum { |
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DefaultFramebuffer defaultFramebuffer; |
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DefaultFramebuffer::DefaultFramebuffer() { _id = 0; } |
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#ifndef MAGNUM_TARGET_GLES2 |
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void DefaultFramebuffer::mapForDraw(std::initializer_list<DrawAttachment> attachments) { |
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GLenum* _attachments = new GLenum[attachments.size()]; |
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for(auto it = attachments.begin(); it != attachments.end(); ++it) |
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_attachments[it-attachments.begin()] = static_cast<GLenum>(*it); |
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bind(Target::Draw); |
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glDrawBuffers(attachments.size(), _attachments); |
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delete[] _attachments; |
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} |
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#endif |
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} |
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#ifndef Magnum_DefaultFramebuffer_h |
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#define Magnum_DefaultFramebuffer_h |
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/*
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Copyright © 2010, 2011, 2012 Vladimír Vondruš <mosra@centrum.cz> |
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|
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This file is part of Magnum. |
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|
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Magnum is free software: you can redistribute it and/or modify |
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it under the terms of the GNU Lesser General Public License version 3 |
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only, as published by the Free Software Foundation. |
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|
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Magnum is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU Lesser General Public License version 3 for more details. |
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*/ |
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|
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/** @file
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* @brief Class Magnum::DefaultFramebuffer |
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*/ |
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#include "AbstractFramebuffer.h" |
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namespace Magnum { |
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/**
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@brief Default framebuffer |
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@see @ref defaultFramebuffer, Framebuffer |
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*/ |
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class MAGNUM_EXPORT DefaultFramebuffer: public AbstractFramebuffer { |
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public: |
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#ifndef MAGNUM_TARGET_GLES2 |
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/**
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* @brief Draw attachment |
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* |
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* @see mapForDraw() |
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* @requires_gles30 Draw attachments for default framebuffer are |
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* available only in OpenGL ES 3.0. |
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*/ |
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enum class DrawAttachment: GLenum { |
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/** Don't use the output. */ |
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None = GL_NONE, |
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#ifndef MAGNUM_TARGET_GLES |
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/**
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* Write output to back left framebuffer. |
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* @requires_gl Stereo rendering is not available in OpenGL ES. |
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*/ |
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BackLeft = GL_BACK_LEFT, |
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|
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/**
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* Write output to back right framebuffer. |
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* @requires_gl Stereo rendering is not available in OpenGL ES. |
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*/ |
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BackRight = GL_BACK_RIGHT, |
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|
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/**
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* Write output to front left framebuffer. |
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* @requires_gl Stereo rendering is not available in OpenGL ES. |
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*/ |
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FrontLeft = GL_FRONT_LEFT, |
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|
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/**
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* Write output to front right framebuffer. |
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* @requires_gl Stereo rendering is not available in OpenGL ES. |
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*/ |
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FrontRight = GL_FRONT_RIGHT, |
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#endif |
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|
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/**
|
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* Write output to back framebuffer. |
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* |
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* On desktop OpenGL, this is equal to @ref DrawAttachment "DrawAttachment::BackLeft". |
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*/ |
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#ifdef MAGNUM_TARGET_GLES |
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Back = GL_BACK, |
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#else |
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Back = GL_BACK_LEFT, |
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#endif |
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|
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/**
|
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* Write output to front framebuffer. |
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* |
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* On desktop OpenGL, this is equal to @ref DrawAttachment "DrawAttachment::FrontLeft". |
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*/ |
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#ifdef MAGNUM_TARGET_GLES |
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Front = GL_FRONT |
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#else |
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Front = GL_FRONT_LEFT |
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#endif |
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}; |
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#endif |
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|
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/**
|
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* @brief Read attachment |
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* |
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* @see mapForRead() |
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* @requires_gles30 %Extension @es_extension2{NV,read_buffer,GL_NV_read_buffer} |
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*/ |
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enum class ReadAttachment: GLenum { |
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/** Don't read from any framebuffer */ |
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None = GL_NONE, |
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|
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#ifndef MAGNUM_TARGET_GLES |
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/**
|
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* Read from back left framebuffer. |
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* @requires_gl Stereo rendering is not available in OpenGL ES. |
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*/ |
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BackLeft = GL_BACK_LEFT, |
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|
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/**
|
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* Read from back right framebuffer. |
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* @requires_gl Stereo rendering is not available in OpenGL ES. |
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*/ |
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BackRight = GL_BACK_RIGHT, |
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|
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/**
|
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* Read from front left framebuffer. |
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* @requires_gl Stereo rendering is not available in OpenGL ES. |
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*/ |
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FrontLeft = GL_FRONT_LEFT, |
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|
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/**
|
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* Read from front right framebuffer. |
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* @requires_gl Stereo rendering is not available in OpenGL ES. |
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*/ |
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FrontRight = GL_FRONT_RIGHT, |
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|
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/**
|
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* Read from left framebuffer. |
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* @requires_gl Stereo rendering is not available in OpenGL ES. |
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*/ |
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Left = GL_LEFT, |
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|
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/**
|
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* Read from right framebuffer. |
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* @requires_gl Stereo rendering is not available in OpenGL ES. |
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*/ |
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Right = GL_RIGHT, |
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#endif |
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|
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/** Read from back framebuffer. */ |
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Back = GL_BACK, |
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|
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/**
|
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* Read from front framebuffer. |
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* @requires_es_extension %Extension @es_extension2{NV,read_buffer,GL_NV_read_buffer} |
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*/ |
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Front = GL_FRONT |
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|
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#ifndef MAGNUM_TARGET_GLES |
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, |
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|
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/**
|
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* Read from front and back framebuffer. |
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* @requires_gl In OpenGL ES you must specify either |
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* @ref Magnum::DefaultFramebuffer::ReadAttachment "ReadAttachment::Front" |
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* or @ref Magnum::DefaultFramebuffer::ReadAttachment "ReadAttachment::Back". |
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*/ |
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FrontAndBack = GL_FRONT_AND_BACK |
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#endif |
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}; |
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|
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MAGNUM_LOCAL DefaultFramebuffer(); |
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|
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#ifndef MAGNUM_TARGET_GLES2 |
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/**
|
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* @brief Map given attachments for drawing |
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* @param attachments Attachments. If any value is |
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* @ref DrawAttachment "Attachment::None", given output is not |
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* used. |
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* |
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* @see mapForRead(), bind(), @fn_gl{DrawBuffers} |
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* @requires_gles30 Draw attachments for default framebuffer are |
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* available only in OpenGL ES 3.0. |
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*/ |
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void mapForDraw(std::initializer_list<DrawAttachment> attachments); |
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#endif |
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|
||||
/**
|
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* @brief Map given attachment for reading |
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* @param attachment Attachment |
||||
* |
||||
* @see mapForDraw(), bind(), @fn_gl{ReadBuffer} |
||||
* @requires_gles30 %Extension @es_extension2{NV,read_buffer,GL_NV_read_buffer} |
||||
*/ |
||||
inline void mapForRead(ReadAttachment attachment) { |
||||
bind(Target::Read); |
||||
/** @todo Get some extension wrangler instead to avoid undeclared glReadBuffer() on ES2 */ |
||||
#ifndef MAGNUM_TARGET_GLES2 |
||||
glReadBuffer(static_cast<GLenum>(attachment)); |
||||
#else |
||||
static_cast<void>(attachment); |
||||
#endif |
||||
} |
||||
}; |
||||
|
||||
/** @brief Default framebuffer instance */ |
||||
extern DefaultFramebuffer MAGNUM_EXPORT defaultFramebuffer; |
||||
|
||||
} |
||||
|
||||
#endif |
||||
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Reference in new issue