b9a5baf42b
This change removes the 'blitFromPbuffer' path in the renderer which uses binding pbuffer to texture. This path does not work on all platforms and is not relavent any more. It simplifies a lot the FBConfig filtering code. Also, added a check to fail the renderer initialization if the translator plugin does not support EGL_KHR_gl_texture_2d_image and GL_OES_EGL_IMAGE (by both GLES implementations [1 and 2]) since our implementation requires it. Change-Id: Ifd4c66943a8da56308cfb7e38914c962b4f5befe
317 lines
9.0 KiB
C++
317 lines
9.0 KiB
C++
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "WindowSurface.h"
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#include "FBConfig.h"
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#include "FrameBuffer.h"
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#include <GLES/glext.h>
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#include "EGLDispatch.h"
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#include "GLDispatch.h"
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#include "GL2Dispatch.h"
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#include <stdio.h>
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#include <string.h>
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#include "GLErrorLog.h"
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WindowSurface::WindowSurface() :
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m_fbObj(0),
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m_depthRB(0),
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m_stencilRB(0),
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m_eglSurface(NULL),
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m_attachedColorBuffer(NULL),
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m_readContext(NULL),
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m_drawContext(NULL),
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m_width(0),
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m_height(0),
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m_pbufWidth(0),
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m_pbufHeight(0)
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{
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}
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WindowSurface::~WindowSurface()
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{
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s_egl.eglDestroySurface(FrameBuffer::getFB()->getDisplay(), m_eglSurface);
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}
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WindowSurface *WindowSurface::create(int p_config, int p_width, int p_height)
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{
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const FBConfig *fbconf = FBConfig::get(p_config);
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if (!fbconf) {
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return NULL;
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}
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// allocate space for the WindowSurface object
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WindowSurface *win = new WindowSurface();
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if (!win) {
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return NULL;
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}
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win->m_fbconf = fbconf;
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FrameBuffer *fb = FrameBuffer::getFB();
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const FrameBufferCaps &caps = fb->getCaps();
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//
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// Create a pbuffer to be used as the egl surface
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// for that window.
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//
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if (!win->resizePbuffer(p_width, p_height)) {
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delete win;
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return NULL;
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}
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win->m_width = p_width;
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win->m_height = p_height;
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return win;
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}
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//
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// flushColorBuffer - The function makes sure that the
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// previous attached color buffer is updated, if copy or blit should be done
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// in order to update it - it is being done here.
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//
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void WindowSurface::flushColorBuffer()
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{
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if (m_attachedColorBuffer.Ptr() != NULL) {
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//copyToColorBuffer();
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blitToColorBuffer();
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}
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}
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//
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// setColorBuffer - this function is called when a new color buffer needs to
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// be attached to the surface. The function doesn't make sure that the
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// previous attached color buffer is updated, this is done by flushColorBuffer
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//
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void WindowSurface::setColorBuffer(ColorBufferPtr p_colorBuffer)
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{
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m_attachedColorBuffer = p_colorBuffer;
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//
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// resize the window if the attached color buffer is of different
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// size
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//
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unsigned int cbWidth = m_attachedColorBuffer->getWidth();
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unsigned int cbHeight = m_attachedColorBuffer->getHeight();
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if (cbWidth != m_width || cbHeight != m_height) {
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if (m_pbufWidth && m_pbufHeight) {
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// if we use pbuffer, need to resize it
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resizePbuffer(cbWidth, cbHeight);
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}
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m_width = cbWidth;
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m_height = cbHeight;
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}
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}
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//
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// This function is called after the context and eglSurface is already
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// bound in the current thread (eglMakeCurrent has been called).
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// This function should take actions required on the other surface objects
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// when being bind/unbound
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//
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void WindowSurface::bind(RenderContextPtr p_ctx, SurfaceBindType p_bindType)
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{
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if (p_bindType == SURFACE_BIND_READ) {
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m_readContext = p_ctx;
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}
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else if (p_bindType == SURFACE_BIND_DRAW) {
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m_drawContext = p_ctx;
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}
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else if (p_bindType == SURFACE_BIND_READDRAW) {
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m_readContext = p_ctx;
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m_drawContext = p_ctx;
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}
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else {
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return; // bad param
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}
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}
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void WindowSurface::copyToColorBuffer()
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{
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if (!m_width && !m_height) return;
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if (m_attachedColorBuffer->getWidth() != m_width ||
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m_attachedColorBuffer->getHeight() != m_height) {
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// XXX: should never happen - how this needs to be handled?
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return;
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}
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void *data = m_xferBuffer.alloc(m_width * m_height * 4);
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if (!data) {
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fprintf(stderr,"WARNING: Failed to copy buffer data - OutOfMemory\n");
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return;
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}
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//
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// Make the surface current
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//
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EGLContext prevContext = s_egl.eglGetCurrentContext();
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EGLSurface prevReadSurf = s_egl.eglGetCurrentSurface(EGL_READ);
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EGLSurface prevDrawSurf = s_egl.eglGetCurrentSurface(EGL_DRAW);
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FrameBuffer *fb = FrameBuffer::getFB();
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if (!s_egl.eglMakeCurrent(fb->getDisplay(), m_eglSurface,
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m_eglSurface, m_drawContext->getEGLContext())) {
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return;
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}
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if (m_drawContext->isGL2()) {
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#ifdef WITH_GLES2
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s_gl2.glPixelStorei(GL_PACK_ALIGNMENT, 1);
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s_gl2.glReadPixels(0, 0, m_width, m_height,
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GL_RGBA, GL_UNSIGNED_BYTE, data);
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#else
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return; // should never happen, context cannot be GL2 in this case.
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#endif
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}
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else {
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s_gl.glPixelStorei(GL_PACK_ALIGNMENT, 1);
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s_gl.glReadPixels(0, 0, m_width, m_height,
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GL_RGBA, GL_UNSIGNED_BYTE, data);
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}
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//
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// XXX: for some reason flipping the image is not required on
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// Mac. Need to find the reason, currently unkbown.
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//
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#ifndef __APPLE__
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#define FLIP_BUFFER 1
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#endif
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#if FLIP_BUFFER
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//We need to flip the pixels
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int bpp = 4;
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void *tmpBuf = m_xUpdateBuf.alloc(m_width * m_height * bpp);
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int dst_line_len = m_width * bpp;
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int src_line_len = m_width * bpp;
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char *src = (char *)data;
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char *dst = (char*)tmpBuf + (m_height-1)*dst_line_len;
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for (uint32_t y=0; y<m_height; y++) {
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memcpy(dst, src, dst_line_len);
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src += src_line_len;
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dst -= dst_line_len;
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}
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// update the attached color buffer with the fliped readback pixels
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m_attachedColorBuffer->update(GL_RGBA, GL_UNSIGNED_BYTE, tmpBuf);
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#else
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// update the attached color buffer with the readback pixels
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m_attachedColorBuffer->update(GL_RGBA, GL_UNSIGNED_BYTE, data);
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#endif
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// restore current context/surface
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s_egl.eglMakeCurrent(fb->getDisplay(), prevDrawSurf,
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prevReadSurf, prevContext);
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}
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void WindowSurface::blitToColorBuffer()
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{
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if (!m_width && !m_height) return;
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if (m_attachedColorBuffer->getWidth() != m_width ||
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m_attachedColorBuffer->getHeight() != m_height) {
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// XXX: should never happen - how this needs to be handled?
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return;
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}
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//
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// Make the surface current
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//
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EGLContext prevContext = s_egl.eglGetCurrentContext();
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EGLSurface prevReadSurf = s_egl.eglGetCurrentSurface(EGL_READ);
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EGLSurface prevDrawSurf = s_egl.eglGetCurrentSurface(EGL_DRAW);
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FrameBuffer *fb = FrameBuffer::getFB();
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if (!s_egl.eglMakeCurrent(fb->getDisplay(), m_eglSurface,
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m_eglSurface, m_drawContext->getEGLContext())) {
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return;
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}
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m_attachedColorBuffer->blitFromCurrentReadBuffer();
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// restore current context/surface
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s_egl.eglMakeCurrent(fb->getDisplay(), prevDrawSurf,
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prevReadSurf, prevContext);
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}
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bool WindowSurface::resizePbuffer(unsigned int p_width, unsigned int p_height)
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{
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if (m_eglSurface &&
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m_pbufWidth == p_width &&
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m_pbufHeight == p_height) {
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// no need to resize
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return true;
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}
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FrameBuffer *fb = FrameBuffer::getFB();
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EGLContext prevContext = s_egl.eglGetCurrentContext();
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EGLSurface prevReadSurf = s_egl.eglGetCurrentSurface(EGL_READ);
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EGLSurface prevDrawSurf = s_egl.eglGetCurrentSurface(EGL_DRAW);
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EGLSurface prevPbuf = m_eglSurface;
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bool needRebindContext = m_eglSurface &&
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(prevReadSurf == m_eglSurface ||
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prevDrawSurf == m_eglSurface);
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if (needRebindContext) {
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s_egl.eglMakeCurrent(fb->getDisplay(), EGL_NO_SURFACE,
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EGL_NO_SURFACE, EGL_NO_CONTEXT);
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}
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//
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// Destroy previous surface
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//
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if (m_eglSurface) {
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s_egl.eglDestroySurface(fb->getDisplay(), m_eglSurface);
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m_eglSurface = NULL;
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}
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const FrameBufferCaps &caps = fb->getCaps();
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//
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// Create pbuffer surface.
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//
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EGLint pbufAttribs[5];
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pbufAttribs[0] = EGL_WIDTH;
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pbufAttribs[1] = p_width;
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pbufAttribs[2] = EGL_HEIGHT;
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pbufAttribs[3] = p_height;
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pbufAttribs[4] = EGL_NONE;
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m_eglSurface = s_egl.eglCreatePbufferSurface(fb->getDisplay(),
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m_fbconf->getEGLConfig(),
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pbufAttribs);
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if (m_eglSurface == EGL_NO_SURFACE) {
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fprintf(stderr, "Renderer error: failed to create/resize pbuffer!!\n");
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return false;
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}
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m_pbufWidth = p_width;
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m_pbufHeight = p_height;
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if (needRebindContext) {
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s_egl.eglMakeCurrent(fb->getDisplay(),
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(prevDrawSurf==prevPbuf) ? m_eglSurface : prevDrawSurf,
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(prevReadSurf==prevPbuf) ? m_eglSurface : prevReadSurf,
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prevContext);
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}
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return true;
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}
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