85 lines
3.1 KiB
C++
85 lines
3.1 KiB
C++
/* -*- Mode: c++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40; -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef GLUploadHelpers_h_
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#define GLUploadHelpers_h_
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#include "GLDefs.h"
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#include "mozilla/gfx/Types.h"
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#include "nsPoint.h"
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#include "nsRegionFwd.h"
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namespace mozilla {
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namespace gfx {
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class DataSourceSurface;
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} // namespace gfx
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namespace gl {
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class GLContext;
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/**
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* Uploads image data to an OpenGL texture, initializing the texture
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* first if necessary.
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*
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* \param gl The GL Context to use.
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* \param aData Start of image data of surface to upload.
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* Corresponds to the first pixel of the texture.
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* \param aStride The image data's stride.
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* \param aFormat The image data's format.
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* \param aDstRegion Region of the texture to upload.
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* \param aTexture The OpenGL texture to use. Must refer to a valid texture.
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* \param aSize The full size of the texture.
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* \param aOutUploadSize If set, the number of bytes the texture requires will
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* be returned here.
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* \param aNeedInit Indicates whether a new texture must be allocated.
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* \param aTextureUnit The texture unit used temporarily to upload the surface.
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* This may be overridden, so clients should not rely on
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* the aTexture being bound to aTextureUnit after this call,
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* or even on aTextureUnit being active.
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* \param aTextureTarget The texture target to use.
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* \return Surface format of this texture.
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*/
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gfx::SurfaceFormat
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UploadImageDataToTexture(GLContext* gl,
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unsigned char* aData,
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int32_t aStride,
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gfx::SurfaceFormat aFormat,
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const nsIntRegion& aDstRegion,
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GLuint aTexture,
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const gfx::IntSize& aSize,
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size_t* aOutUploadSize = nullptr,
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bool aNeedInit = false,
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GLenum aTextureUnit = LOCAL_GL_TEXTURE0,
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GLenum aTextureTarget = LOCAL_GL_TEXTURE_2D);
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/**
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* Convenience wrapper around UploadImageDataToTexture for
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* gfx::DataSourceSurface's.
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*
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* \param aSurface The surface from which to upload image data.
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* \param aSrcPoint Offset into aSurface where this texture's data begins.
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*/
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gfx::SurfaceFormat
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UploadSurfaceToTexture(GLContext* gl,
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gfx::DataSourceSurface* aSurface,
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const nsIntRegion& aDstRegion,
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GLuint aTexture,
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const gfx::IntSize& aSize,
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size_t* aOutUploadSize = nullptr,
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bool aNeedInit = false,
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const gfx::IntPoint& aSrcPoint = gfx::IntPoint(0, 0),
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GLenum aTextureUnit = LOCAL_GL_TEXTURE0,
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GLenum aTextureTarget = LOCAL_GL_TEXTURE_2D);
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bool CanUploadSubTextures(GLContext* gl);
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bool CanUploadNonPowerOfTwo(GLContext* gl);
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} // namespace gl
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} // namespace mozilla
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#endif
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