distrib/android-emugl: Move Android GPU emulation sources here.

This patch is used to add the unmodified sources of the GPU
emulation libraries that are normally under sdk/emulator/opengl/.

These sources were originally built with the platform build system,
but this is no longer the case. Since they are only built through
the emulator's own build system (i.e. android-rebuild.sh), it's
easier to put them under external/qemu/ to ensure that they are
always in sync with the rest of the emulator.

Note that the encoder sources are still in the platform under
device/generic/goldfish/opengl/.

A future patch will update the emulator build system to pick
the sources from here, and another one will remove the sources
from sdk/ after that.

Note: these are the unmodified sources from the following
      commit in https://android.googlesource.com/platform/sdk.git :

    182e469 emulator/opengl: Fix Windows cross-build.

Change-Id: If2010577ef4af4c6755ab345f424af0b546f9282

1 files changed, 370 insertions, 0 deletions

diff --git a/distrib/android-emugl/host/libs/libOpenglRender/RenderControl.cpp b/distrib/android-emugl/host/libs/libOpenglRender/RenderControl.cpp
new file mode 100644
index 000000000..c7c792aa4
--- /dev/null
+++ b/distrib/android-emugl/host/libs/libOpenglRender/RenderControl.cpp
@@ -0,0 +1,370 @@
+/*
+* 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 "renderControl_dec.h"
+#include "FrameBuffer.h"
+#include "FBConfig.h"
+#include "EGLDispatch.h"
+#include "GLDispatch.h"
+#include "GL2Dispatch.h"
+#include "ThreadInfo.h"
+
+static const GLint rendererVersion = 1;
+
+static GLint rcGetRendererVersion()
+{
+    return rendererVersion;
+}
+
+static EGLint rcGetEGLVersion(EGLint* major, EGLint* minor)
+{
+    FrameBuffer *fb = FrameBuffer::getFB();
+    if (!fb) {
+        return EGL_FALSE;
+    }
+    *major = (EGLint)fb->getCaps().eglMajor;
+    *minor = (EGLint)fb->getCaps().eglMinor;
+
+    return EGL_TRUE;
+}
+
+static EGLint rcQueryEGLString(EGLenum name, void* buffer, EGLint bufferSize)
+{
+    FrameBuffer *fb = FrameBuffer::getFB();
+    if (!fb) {
+        return 0;
+    }
+
+    const char *str = s_egl.eglQueryString(fb->getDisplay(), name);
+    if (!str) {
+        return 0;
+    }
+
+    int len = strlen(str) + 1;
+    if (!buffer || len > bufferSize) {
+        return -len;
+    }
+
+    strcpy((char *)buffer, str);
+    return len;
+}
+
+static EGLint rcGetGLString(EGLenum name, void* buffer, EGLint bufferSize)
+{
+    RenderThreadInfo *tInfo = RenderThreadInfo::get();
+    if (!tInfo || !tInfo->currContext.Ptr()) {
+        return 0;
+    }
+
+    const char *str = NULL;
+#ifdef WITH_GLES2
+    if (tInfo->currContext->isGL2()) {
+        str = (const char *)s_gl2.glGetString(name);
+    }
+    else {
+#endif
+        str = (const char *)s_gl.glGetString(name);
+#ifdef WITH_GLES2
+    }
+#endif
+
+    if (!str) {
+        return 0;
+    }
+
+    int len = strlen(str) + 1;
+    if (!buffer || len > bufferSize) {
+        return -len;
+    }
+
+    strcpy((char *)buffer, str);
+    return len;
+}
+
+static EGLint rcGetNumConfigs(uint32_t* numAttribs)
+{
+    if (numAttribs) {
+        *numAttribs = FBConfig::getNumAttribs();
+    }
+    return FBConfig::getNumConfigs();
+}
+
+static EGLint rcGetConfigs(uint32_t bufSize, GLuint* buffer)
+{
+    int configSize = FBConfig::getNumAttribs();
+    int nConfigs = FBConfig::getNumConfigs();
+    uint32_t neededSize = (nConfigs + 1) * configSize * sizeof(GLuint);
+    if (!buffer || bufSize < neededSize) {
+        return -neededSize;
+    }
+    FBConfig::packConfigsInfo(buffer);
+    return nConfigs;
+}
+
+static EGLint rcChooseConfig(EGLint *attribs, uint32_t attribs_size, uint32_t *configs, uint32_t configs_size)
+{
+    FrameBuffer *fb = FrameBuffer::getFB();
+    if (!fb) {
+        return 0;
+    }
+
+    return FBConfig::chooseConfig(fb, attribs, configs, configs_size);
+}
+
+static EGLint rcGetFBParam(EGLint param)
+{
+    FrameBuffer *fb = FrameBuffer::getFB();
+    if (!fb) {
+        return 0;
+    }
+
+    EGLint ret = 0;
+
+    switch(param) {
+        case FB_WIDTH:
+            ret = fb->getWidth();
+            break;
+        case FB_HEIGHT:
+            ret = fb->getHeight();
+            break;
+        case FB_XDPI:
+            ret = 72; // XXX: should be implemented
+            break;
+        case FB_YDPI:
+            ret = 72; // XXX: should be implemented
+            break;
+        case FB_FPS:
+            ret = 60;
+            break;
+        case FB_MIN_SWAP_INTERVAL:
+            ret = 1; // XXX: should be implemented
+            break;
+        case FB_MAX_SWAP_INTERVAL:
+            ret = 1; // XXX: should be implemented
+            break;
+        default:
+            break;
+    }
+
+    return ret;
+}
+
+static uint32_t rcCreateContext(uint32_t config,
+                                uint32_t share, uint32_t glVersion)
+{
+    FrameBuffer *fb = FrameBuffer::getFB();
+    if (!fb) {
+        return 0;
+    }
+
+    HandleType ret = fb->createRenderContext(config, share, glVersion == 2);
+    return ret;
+}
+
+static void rcDestroyContext(uint32_t context)
+{
+    FrameBuffer *fb = FrameBuffer::getFB();
+    if (!fb) {
+        return;
+    }
+
+    fb->DestroyRenderContext(context);
+}
+
+static uint32_t rcCreateWindowSurface(uint32_t config,
+                                      uint32_t width, uint32_t height)
+{
+    FrameBuffer *fb = FrameBuffer::getFB();
+    if (!fb) {
+        return 0;
+    }
+
+    return fb->createWindowSurface(config, width, height);
+}
+
+static void rcDestroyWindowSurface(uint32_t windowSurface)
+{
+    FrameBuffer *fb = FrameBuffer::getFB();
+    if (!fb) {
+        return;
+    }
+
+    fb->DestroyWindowSurface( windowSurface );
+}
+
+static uint32_t rcCreateColorBuffer(uint32_t width,
+                                    uint32_t height, GLenum internalFormat)
+{
+    FrameBuffer *fb = FrameBuffer::getFB();
+    if (!fb) {
+        return 0;
+    }
+
+    return fb->createColorBuffer(width, height, internalFormat);
+}
+
+static int rcOpenColorBuffer2(uint32_t colorbuffer)
+{
+    FrameBuffer *fb = FrameBuffer::getFB();
+    if (!fb) {
+        return -1;
+    }
+    return fb->openColorBuffer( colorbuffer );
+}
+
+// Deprecated, kept for compatibility with old system images only.
+// Use rcOpenColorBuffer2 instead.
+static void rcOpenColorBuffer(uint32_t colorbuffer)
+{
+    (void) rcOpenColorBuffer2(colorbuffer);
+}
+
+static void rcCloseColorBuffer(uint32_t colorbuffer)
+{
+    FrameBuffer *fb = FrameBuffer::getFB();
+    if (!fb) {
+        return;
+    }
+    fb->closeColorBuffer( colorbuffer );
+}
+
+static int rcFlushWindowColorBuffer(uint32_t windowSurface)
+{
+    FrameBuffer *fb = FrameBuffer::getFB();
+    if (!fb) {
+        return -1;
+    }
+    if (!fb->flushWindowSurfaceColorBuffer(windowSurface)) {
+        return -1;
+    }
+    return 0;
+}
+
+static void rcSetWindowColorBuffer(uint32_t windowSurface,
+                                   uint32_t colorBuffer)
+{
+    FrameBuffer *fb = FrameBuffer::getFB();
+    if (!fb) {
+        return;
+    }
+    fb->setWindowSurfaceColorBuffer(windowSurface, colorBuffer);
+}
+
+static EGLint rcMakeCurrent(uint32_t context,
+                            uint32_t drawSurf, uint32_t readSurf)
+{
+    FrameBuffer *fb = FrameBuffer::getFB();
+    if (!fb) {
+        return EGL_FALSE;
+    }
+
+    bool ret = fb->bindContext(context, drawSurf, readSurf);
+
+    return (ret ? EGL_TRUE : EGL_FALSE);
+}
+
+static void rcFBPost(uint32_t colorBuffer)
+{
+    FrameBuffer *fb = FrameBuffer::getFB();
+    if (!fb) {
+        return;
+    }
+
+    fb->post(colorBuffer);
+}
+
+static void rcFBSetSwapInterval(EGLint interval)
+{
+   // XXX: TBD - should be implemented
+}
+
+static void rcBindTexture(uint32_t colorBuffer)
+{
+    FrameBuffer *fb = FrameBuffer::getFB();
+    if (!fb) {
+        return;
+    }
+
+    fb->bindColorBufferToTexture(colorBuffer);
+}
+
+static void rcBindRenderbuffer(uint32_t colorBuffer)
+{
+    FrameBuffer *fb = FrameBuffer::getFB();
+    if (!fb) {
+        return;
+    }
+
+    fb->bindColorBufferToRenderbuffer(colorBuffer);
+}
+
+static EGLint rcColorBufferCacheFlush(uint32_t colorBuffer,
+                                      EGLint postCount, int forRead)
+{
+   // XXX: TBD - should be implemented
+   return 0;
+}
+
+static void rcReadColorBuffer(uint32_t colorBuffer,
+                              GLint x, GLint y,
+                              GLint width, GLint height,
+                              GLenum format, GLenum type, void* pixels)
+{
+   // XXX: TBD - should be implemented
+}
+
+static int rcUpdateColorBuffer(uint32_t colorBuffer,
+                                GLint x, GLint y,
+                                GLint width, GLint height,
+                                GLenum format, GLenum type, void* pixels)
+{
+    FrameBuffer *fb = FrameBuffer::getFB();
+    if (!fb) {
+        return -1;
+    }
+
+    fb->updateColorBuffer(colorBuffer, x, y, width, height, format, type, pixels);
+    return 0;
+}
+
+void initRenderControlContext(renderControl_decoder_context_t *dec)
+{
+    dec->rcGetRendererVersion = rcGetRendererVersion;
+    dec->rcGetEGLVersion = rcGetEGLVersion;
+    dec->rcQueryEGLString = rcQueryEGLString;
+    dec->rcGetGLString = rcGetGLString;
+    dec->rcGetNumConfigs = rcGetNumConfigs;
+    dec->rcGetConfigs = rcGetConfigs;
+    dec->rcChooseConfig = rcChooseConfig;
+    dec->rcGetFBParam = rcGetFBParam;
+    dec->rcCreateContext = rcCreateContext;
+    dec->rcDestroyContext = rcDestroyContext;
+    dec->rcCreateWindowSurface = rcCreateWindowSurface;
+    dec->rcDestroyWindowSurface = rcDestroyWindowSurface;
+    dec->rcCreateColorBuffer = rcCreateColorBuffer;
+    dec->rcOpenColorBuffer = rcOpenColorBuffer;
+    dec->rcCloseColorBuffer = rcCloseColorBuffer;
+    dec->rcSetWindowColorBuffer = rcSetWindowColorBuffer;
+    dec->rcFlushWindowColorBuffer = rcFlushWindowColorBuffer;
+    dec->rcMakeCurrent = rcMakeCurrent;
+    dec->rcFBPost = rcFBPost;
+    dec->rcFBSetSwapInterval = rcFBSetSwapInterval;
+    dec->rcBindTexture = rcBindTexture;
+    dec->rcBindRenderbuffer = rcBindRenderbuffer;
+    dec->rcColorBufferCacheFlush = rcColorBufferCacheFlush;
+    dec->rcReadColorBuffer = rcReadColorBuffer;
+    dec->rcUpdateColorBuffer = rcUpdateColorBuffer;
+    dec->rcOpenColorBuffer2 = rcOpenColorBuffer2;
+}