зеркало из https://github.com/mozilla/gecko-dev.git
111 строки
3.3 KiB
Plaintext
111 строки
3.3 KiB
Plaintext
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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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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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#include "TextureImageCGL.h"
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#include "GLContext.h"
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#include "gfxQuartzSurface.h"
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#include "gfxPlatform.h"
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#include "gfxFailure.h"
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namespace mozilla {
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namespace gl {
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TextureImageCGL::TextureImageCGL(GLuint aTexture,
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const nsIntSize& aSize,
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GLenum aWrapMode,
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ContentType aContentType,
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GLContext* aContext,
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TextureImage::Flags aFlags,
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TextureImage::ImageFormat aImageFormat)
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: BasicTextureImage(aTexture, aSize, aWrapMode, aContentType,
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aContext, aFlags, aImageFormat)
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, mPixelBuffer(0)
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, mPixelBufferSize(0)
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, mBoundPixelBuffer(false)
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{}
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TextureImageCGL::~TextureImageCGL()
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{
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if (mPixelBuffer) {
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mGLContext->MakeCurrent();
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mGLContext->fDeleteBuffers(1, &mPixelBuffer);
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}
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}
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already_AddRefed<gfxASurface>
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TextureImageCGL::GetSurfaceForUpdate(const gfxIntSize& aSize, ImageFormat aFmt)
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{
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gfxIntSize size(aSize.width + 1, aSize.height + 1);
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mGLContext->MakeCurrent();
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if (!mGLContext->
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IsExtensionSupported(GLContext::ARB_pixel_buffer_object))
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{
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return gfxPlatform::GetPlatform()->
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CreateOffscreenSurface(size,
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gfxASurface::ContentFromFormat(aFmt));
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}
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if (!mPixelBuffer) {
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mGLContext->fGenBuffers(1, &mPixelBuffer);
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}
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mGLContext->fBindBuffer(LOCAL_GL_PIXEL_UNPACK_BUFFER, mPixelBuffer);
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int32_t length = size.width * 4 * size.height;
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if (length > mPixelBufferSize) {
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mGLContext->fBufferData(LOCAL_GL_PIXEL_UNPACK_BUFFER, length,
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NULL, LOCAL_GL_STREAM_DRAW);
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mPixelBufferSize = length;
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}
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unsigned char* data =
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(unsigned char*)mGLContext->
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fMapBuffer(LOCAL_GL_PIXEL_UNPACK_BUFFER,
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LOCAL_GL_WRITE_ONLY);
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mGLContext->fBindBuffer(LOCAL_GL_PIXEL_UNPACK_BUFFER, 0);
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if (!data) {
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nsAutoCString failure;
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failure += "Pixel buffer binding failed: ";
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failure.AppendPrintf("%dx%d\n", size.width, size.height);
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gfx::LogFailure(failure);
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mGLContext->fBindBuffer(LOCAL_GL_PIXEL_UNPACK_BUFFER, 0);
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return gfxPlatform::GetPlatform()->
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CreateOffscreenSurface(size,
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gfxASurface::ContentFromFormat(aFmt));
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}
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nsRefPtr<gfxQuartzSurface> surf =
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new gfxQuartzSurface(data, size, size.width * 4, aFmt);
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mBoundPixelBuffer = true;
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return surf.forget();
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}
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bool
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TextureImageCGL::FinishedSurfaceUpdate()
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{
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if (mBoundPixelBuffer) {
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mGLContext->MakeCurrent();
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mGLContext->fBindBuffer(LOCAL_GL_PIXEL_UNPACK_BUFFER, mPixelBuffer);
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mGLContext->fUnmapBuffer(LOCAL_GL_PIXEL_UNPACK_BUFFER);
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return true;
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}
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return false;
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}
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void
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TextureImageCGL::FinishedSurfaceUpload()
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{
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if (mBoundPixelBuffer) {
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mGLContext->MakeCurrent();
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mGLContext->fBindBuffer(LOCAL_GL_PIXEL_UNPACK_BUFFER, 0);
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mBoundPixelBuffer = false;
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}
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}
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}
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}
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