Move emulator GLES from development.git to sdk.git

The emulator GLES support has two interfaces: a host shared library
interface used by QEMU, and a protocol between the platform and the
host. The host library interface is not versioned; QEMU and the GLES
renderer must match. The protocol on the other hand must be backwards
compatible: a new GLES renderer must support an older platform image.

Thus for branching purposes it makes more sense to put the GLES
renderer in sdk.git, which is branched along with qemu.git for SDK
releases. Platform images will be built against the protocol version
in the platform branch of sdk.git.

Change-Id: I2c3bce627ecfd0a4b3e688d1839fe10755a21e58

1 files changed, 236 insertions, 0 deletions

diff --git a/emulator/opengl/host/libs/libOpenglRender/WindowSurface.cpp b/emulator/opengl/host/libs/libOpenglRender/WindowSurface.cpp
new file mode 100644
index 0000000..3674120
--- /dev/null
+++ b/emulator/opengl/host/libs/libOpenglRender/WindowSurface.cpp
@@ -0,0 +1,236 @@
+/*
+* Copyright (C) 2011 The Android Open Source Project
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+#include "WindowSurface.h"
+#include "FBConfig.h"
+#include "FrameBuffer.h"
+#include <GLES/glext.h>
+#include "EGLDispatch.h"
+#include "GLDispatch.h"
+#include "GL2Dispatch.h"
+#include <stdio.h>
+#include <string.h>
+#include "GLErrorLog.h"
+
+WindowSurface::WindowSurface() :
+    m_fbObj(0),
+    m_depthRB(0),
+    m_stencilRB(0),
+    m_eglSurface(NULL),
+    m_attachedColorBuffer(NULL),
+    m_readContext(NULL),
+    m_drawContext(NULL),
+    m_width(0),
+    m_height(0),
+    m_pbufWidth(0),
+    m_pbufHeight(0)
+{
+}
+
+WindowSurface::~WindowSurface()
+{
+    s_egl.eglDestroySurface(FrameBuffer::getFB()->getDisplay(), m_eglSurface);
+}
+
+WindowSurface *WindowSurface::create(int p_config, int p_width, int p_height)
+{
+    const FBConfig *fbconf = FBConfig::get(p_config);
+    if (!fbconf) {
+        return NULL;
+    }
+
+    // allocate space for the WindowSurface object
+    WindowSurface *win = new WindowSurface();
+    if (!win) {
+        return NULL;
+    }
+    win->m_fbconf = fbconf;
+
+    FrameBuffer *fb = FrameBuffer::getFB();
+    const FrameBufferCaps &caps = fb->getCaps();
+
+    //
+    // Create a pbuffer to be used as the egl surface
+    // for that window.
+    //
+    if (!win->resizePbuffer(p_width, p_height)) {
+        delete win;
+        return NULL;
+    }
+
+    win->m_width = p_width;
+    win->m_height = p_height;
+
+    return win;
+}
+
+//
+// flushColorBuffer - The function makes sure that the
+//    previous attached color buffer is updated, if copy or blit should be done
+//    in order to update it - it is being done here.
+//
+void WindowSurface::flushColorBuffer()
+{
+    if (m_attachedColorBuffer.Ptr() != NULL) {
+        blitToColorBuffer();
+    }
+}
+
+//
+// setColorBuffer - this function is called when a new color buffer needs to
+//    be attached to the surface. The function doesn't make sure that the
+//    previous attached color buffer is updated, this is done by flushColorBuffer
+//
+void WindowSurface::setColorBuffer(ColorBufferPtr p_colorBuffer)
+{
+    m_attachedColorBuffer = p_colorBuffer;
+
+    //
+    // resize the window if the attached color buffer is of different
+    // size
+    //
+    unsigned int cbWidth = m_attachedColorBuffer->getWidth();
+    unsigned int cbHeight = m_attachedColorBuffer->getHeight();
+
+    if (cbWidth != m_width || cbHeight != m_height) {
+
+        if (m_pbufWidth && m_pbufHeight) {
+            // if we use pbuffer, need to resize it
+            resizePbuffer(cbWidth, cbHeight);
+        }
+
+        m_width = cbWidth;
+        m_height = cbHeight;
+    }
+}
+
+//
+// This function is called after the context and eglSurface is already
+// bound in the current thread (eglMakeCurrent has been called).
+// This function should take actions required on the other surface objects
+// when being bind/unbound
+//
+void WindowSurface::bind(RenderContextPtr p_ctx, SurfaceBindType p_bindType)
+{
+    if (p_bindType == SURFACE_BIND_READ) {
+        m_readContext = p_ctx;
+    }
+    else if (p_bindType == SURFACE_BIND_DRAW) {
+        m_drawContext = p_ctx;
+    }
+    else if (p_bindType == SURFACE_BIND_READDRAW) {
+        m_readContext = p_ctx;
+        m_drawContext = p_ctx;
+    }
+    else {
+        return;  // bad param
+    }
+
+}
+
+void WindowSurface::blitToColorBuffer()
+{
+    if (!m_width && !m_height) return;
+
+    if (m_attachedColorBuffer->getWidth() != m_width ||
+        m_attachedColorBuffer->getHeight() != m_height) {
+        // XXX: should never happen - how this needs to be handled?
+        return;
+    }
+
+    //
+    // Make the surface current
+    //
+    EGLContext prevContext = s_egl.eglGetCurrentContext();
+    EGLSurface prevReadSurf = s_egl.eglGetCurrentSurface(EGL_READ);
+    EGLSurface prevDrawSurf = s_egl.eglGetCurrentSurface(EGL_DRAW);
+    FrameBuffer *fb = FrameBuffer::getFB();
+    if (!s_egl.eglMakeCurrent(fb->getDisplay(), m_eglSurface,
+                              m_eglSurface, m_drawContext->getEGLContext())) {
+        return;
+    }
+
+    m_attachedColorBuffer->blitFromCurrentReadBuffer();
+
+    // restore current context/surface
+    s_egl.eglMakeCurrent(fb->getDisplay(), prevDrawSurf,
+                         prevReadSurf, prevContext);
+
+}
+
+bool WindowSurface::resizePbuffer(unsigned int p_width, unsigned int p_height)
+{
+    if (m_eglSurface && 
+        m_pbufWidth == p_width &&
+        m_pbufHeight == p_height) {
+        // no need to resize
+        return true;
+    }
+
+    FrameBuffer *fb = FrameBuffer::getFB();
+
+    EGLContext prevContext = s_egl.eglGetCurrentContext();
+    EGLSurface prevReadSurf = s_egl.eglGetCurrentSurface(EGL_READ);
+    EGLSurface prevDrawSurf = s_egl.eglGetCurrentSurface(EGL_DRAW);
+    EGLSurface prevPbuf = m_eglSurface;
+    bool needRebindContext = m_eglSurface &&
+                             (prevReadSurf == m_eglSurface ||
+                              prevDrawSurf == m_eglSurface);
+
+    if (needRebindContext) {
+        s_egl.eglMakeCurrent(fb->getDisplay(), EGL_NO_SURFACE,
+                              EGL_NO_SURFACE, EGL_NO_CONTEXT);
+    }
+
+    //
+    // Destroy previous surface
+    //
+    if (m_eglSurface) {
+        s_egl.eglDestroySurface(fb->getDisplay(), m_eglSurface);
+        m_eglSurface = NULL;
+    }
+
+    const FrameBufferCaps &caps = fb->getCaps();
+
+    //
+    // Create pbuffer surface.
+    //
+    EGLint pbufAttribs[5];
+    pbufAttribs[0] = EGL_WIDTH;
+    pbufAttribs[1] = p_width;
+    pbufAttribs[2] = EGL_HEIGHT;
+    pbufAttribs[3] = p_height;
+    pbufAttribs[4] = EGL_NONE;
+
+    m_eglSurface = s_egl.eglCreatePbufferSurface(fb->getDisplay(),
+                                                 m_fbconf->getEGLConfig(),
+                                                 pbufAttribs);
+    if (m_eglSurface == EGL_NO_SURFACE) {
+        fprintf(stderr, "Renderer error: failed to create/resize pbuffer!!\n");
+        return false;
+    }
+
+    m_pbufWidth = p_width;
+    m_pbufHeight = p_height;
+
+    if (needRebindContext) {
+        s_egl.eglMakeCurrent(fb->getDisplay(), 
+                     (prevDrawSurf==prevPbuf) ? m_eglSurface : prevDrawSurf,
+                     (prevReadSurf==prevPbuf) ? m_eglSurface : prevReadSurf,
+                     prevContext);
+    }
+
+    return true;
+}