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//
// Copyright (c) 2015 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// SurfaceWGL.cpp: WGL implementation of egl::Surface
#include "libANGLE/renderer/gl/wgl/PbufferSurfaceWGL.h"
#include "common/debug.h"
#include "libANGLE/renderer/gl/RendererGL.h"
#include "libANGLE/renderer/gl/wgl/FunctionsWGL.h"
#include "libANGLE/renderer/gl/wgl/wgl_utils.h"
namespace rx
{
PbufferSurfaceWGL::PbufferSurfaceWGL(const egl::SurfaceState &state,
RendererGL *renderer,
EGLint width,
EGLint height,
EGLenum textureFormat,
EGLenum textureTarget,
bool largest,
int pixelFormat,
HDC deviceContext,
HGLRC wglContext,
const FunctionsWGL *functions)
: SurfaceGL(state, renderer),
mWidth(width),
mHeight(height),
mLargest(largest),
mTextureFormat(textureFormat),
mTextureTarget(textureTarget),
mPixelFormat(pixelFormat),
mShareWGLContext(wglContext),
mParentDeviceContext(deviceContext),
mPbuffer(nullptr),
mPbufferDeviceContext(nullptr),
mFunctionsWGL(functions)
{
}
PbufferSurfaceWGL::~PbufferSurfaceWGL()
{
mFunctionsWGL->releasePbufferDCARB(mPbuffer, mPbufferDeviceContext);
mPbufferDeviceContext = nullptr;
mFunctionsWGL->destroyPbufferARB(mPbuffer);
mPbuffer = nullptr;
}
static int GetWGLTextureType(EGLenum eglTextureType)
{
switch (eglTextureType)
{
case EGL_NO_TEXTURE: return WGL_NO_TEXTURE_ARB;
case EGL_TEXTURE_RGB: return WGL_TEXTURE_RGB_ARB;
case EGL_TEXTURE_RGBA: return WGL_TEXTURE_RGBA_ARB;
default: UNREACHABLE(); return 0;
}
}
static int GetWGLTextureTarget(EGLenum eglTextureTarget)
{
switch (eglTextureTarget)
{
case EGL_NO_TEXTURE: return WGL_NO_TEXTURE_ARB;
case EGL_TEXTURE_2D: return WGL_TEXTURE_2D_ARB;
default: UNREACHABLE(); return 0;
}
}
egl::Error PbufferSurfaceWGL::initialize()
{
const int pbufferCreationAttributes[] =
{
WGL_PBUFFER_LARGEST_ARB, mLargest ? 1 : 0,
WGL_TEXTURE_FORMAT_ARB, GetWGLTextureType(mTextureFormat),
WGL_TEXTURE_TARGET_ARB, GetWGLTextureTarget(mTextureTarget),
0, 0,
};
mPbuffer = mFunctionsWGL->createPbufferARB(mParentDeviceContext, mPixelFormat, mWidth, mHeight,
pbufferCreationAttributes);
if (mPbuffer == nullptr)
{
DWORD error = GetLastError();
return egl::Error(EGL_BAD_ALLOC, "Failed to create a native WGL pbuffer, error: 0x%08x.", HRESULT_CODE(error));
}
// The returned pbuffer may not be as large as requested, update the size members.
if (mFunctionsWGL->queryPbufferARB(mPbuffer, WGL_PBUFFER_WIDTH_ARB, &mWidth) != TRUE ||
mFunctionsWGL->queryPbufferARB(mPbuffer, WGL_PBUFFER_HEIGHT_ARB, &mHeight) != TRUE)
{
DWORD error = GetLastError();
return egl::Error(EGL_BAD_ALLOC, "Failed to query the WGL pbuffer's dimensions, error: 0x%08x.", HRESULT_CODE(error));
}
mPbufferDeviceContext = mFunctionsWGL->getPbufferDCARB(mPbuffer);
if (mPbufferDeviceContext == nullptr)
{
mFunctionsWGL->destroyPbufferARB(mPbuffer);
mPbuffer = nullptr;
DWORD error = GetLastError();
return egl::Error(EGL_BAD_ALLOC, "Failed to get the WGL pbuffer handle, error: 0x%08x.", HRESULT_CODE(error));
}
return egl::Error(EGL_SUCCESS);
}
egl::Error PbufferSurfaceWGL::makeCurrent()
{
if (!mFunctionsWGL->makeCurrent(mPbufferDeviceContext, mShareWGLContext))
{
// TODO: What error type here?
return egl::Error(EGL_CONTEXT_LOST, "Failed to make the WGL context current.");
}
return egl::Error(EGL_SUCCESS);
}
egl::Error PbufferSurfaceWGL::swap()
{
return egl::Error(EGL_SUCCESS);
}
egl::Error PbufferSurfaceWGL::postSubBuffer(EGLint x, EGLint y, EGLint width, EGLint height)
{
return egl::Error(EGL_SUCCESS);
}
egl::Error PbufferSurfaceWGL::querySurfacePointerANGLE(EGLint attribute, void **value)
{
UNIMPLEMENTED();
return egl::Error(EGL_SUCCESS);
}
static int GetWGLBufferBindTarget(EGLint buffer)
{
switch (buffer)
{
case EGL_BACK_BUFFER: return WGL_BACK_LEFT_ARB;
default: UNREACHABLE(); return 0;
}
}
egl::Error PbufferSurfaceWGL::bindTexImage(gl::Texture *texture, EGLint buffer)
{
if (!mFunctionsWGL->bindTexImageARB(mPbuffer, GetWGLBufferBindTarget(buffer)))
{
DWORD error = GetLastError();
return egl::Error(EGL_BAD_SURFACE, "Failed to bind native wgl pbuffer, error: 0x%08x.", HRESULT_CODE(error));
}
return egl::Error(EGL_SUCCESS);
}
egl::Error PbufferSurfaceWGL::releaseTexImage(EGLint buffer)
{
if (!mFunctionsWGL->releaseTexImageARB(mPbuffer, GetWGLBufferBindTarget(buffer)))
{
DWORD error = GetLastError();
return egl::Error(EGL_BAD_SURFACE, "Failed to unbind native wgl pbuffer, error: 0x%08x.", HRESULT_CODE(error));
}
return egl::Error(EGL_SUCCESS);
}
void PbufferSurfaceWGL::setSwapInterval(EGLint interval)
{
}
EGLint PbufferSurfaceWGL::getWidth() const
{
return mWidth;
}
EGLint PbufferSurfaceWGL::getHeight() const
{
return mHeight;
}
EGLint PbufferSurfaceWGL::isPostSubBufferSupported() const
{
return EGL_FALSE;
}
EGLint PbufferSurfaceWGL::getSwapBehavior() const
{
return EGL_BUFFER_PRESERVED;
}
}
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