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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gl/GLTestContext.h"
#include <windows.h>
#include <GL/GL.h>
#include "win/SkWGL.h"
#include <windows.h>
namespace {
std::function<void()> context_restorer() {
auto glrc = wglGetCurrentContext();
auto dc = wglGetCurrentDC();
return [glrc, dc] { wglMakeCurrent(dc, glrc); };
}
class WinGLTestContext : public sk_gpu_test::GLTestContext {
public:
WinGLTestContext(GrGLStandard forcedGpuAPI, WinGLTestContext* shareContext);
~WinGLTestContext() override;
private:
void destroyGLContext();
void onPlatformMakeCurrent() const override;
std::function<void()> onPlatformGetAutoContextRestore() const override;
void onPlatformSwapBuffers() const override;
GrGLFuncPtr onPlatformGetProcAddress(const char* name) const override;
HWND fWindow;
HDC fDeviceContext;
HGLRC fGlRenderContext;
static ATOM gWC;
sk_sp<SkWGLPbufferContext> fPbufferContext;
};
ATOM WinGLTestContext::gWC = 0;
WinGLTestContext::WinGLTestContext(GrGLStandard forcedGpuAPI, WinGLTestContext* shareContext)
: fWindow(nullptr)
, fDeviceContext(nullptr)
, fGlRenderContext(0)
, fPbufferContext(nullptr) {
HINSTANCE hInstance = (HINSTANCE)GetModuleHandle(nullptr);
if (!gWC) {
WNDCLASS wc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hbrBackground = nullptr;
wc.hCursor = LoadCursor(nullptr, IDC_ARROW);
wc.hIcon = LoadIcon(nullptr, IDI_APPLICATION);
wc.hInstance = hInstance;
wc.lpfnWndProc = (WNDPROC) DefWindowProc;
wc.lpszClassName = TEXT("Griffin");
wc.lpszMenuName = nullptr;
wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
gWC = RegisterClass(&wc);
if (!gWC) {
SkDebugf("Could not register window class.\n");
return;
}
}
if (!(fWindow = CreateWindow(TEXT("Griffin"),
TEXT("The Invisible Man"),
WS_OVERLAPPEDWINDOW,
0, 0, 1, 1,
nullptr, nullptr,
hInstance, nullptr))) {
SkDebugf("Could not create window.\n");
return;
}
if (!(fDeviceContext = GetDC(fWindow))) {
SkDebugf("Could not get device context.\n");
this->destroyGLContext();
return;
}
// Requesting a Core profile would bar us from using NVPR. So we request
// compatibility profile or GL ES.
SkWGLContextRequest contextType =
kGLES_GrGLStandard == forcedGpuAPI ?
kGLES_SkWGLContextRequest : kGLPreferCompatibilityProfile_SkWGLContextRequest;
HGLRC winShareContext = nullptr;
if (shareContext) {
winShareContext = shareContext->fPbufferContext ? shareContext->fPbufferContext->getGLRC()
: shareContext->fGlRenderContext;
}
fPbufferContext = SkWGLPbufferContext::Create(fDeviceContext, contextType, winShareContext);
HDC dc;
HGLRC glrc;
if (nullptr == fPbufferContext) {
if (!(fGlRenderContext = SkCreateWGLContext(fDeviceContext, 0, false, contextType,
winShareContext))) {
SkDebugf("Could not create rendering context.\n");
this->destroyGLContext();
return;
}
dc = fDeviceContext;
glrc = fGlRenderContext;
} else {
ReleaseDC(fWindow, fDeviceContext);
fDeviceContext = 0;
DestroyWindow(fWindow);
fWindow = 0;
dc = fPbufferContext->getDC();
glrc = fPbufferContext->getGLRC();
}
SkScopeExit restorer(context_restorer());
if (!(wglMakeCurrent(dc, glrc))) {
SkDebugf("Could not set the context.\n");
this->destroyGLContext();
return;
}
auto gl = GrGLMakeNativeInterface();
if (!gl) {
SkDebugf("Could not create GL interface.\n");
this->destroyGLContext();
return;
}
if (!gl->validate()) {
SkDebugf("Could not validate GL interface.\n");
this->destroyGLContext();
return;
}
this->init(std::move(gl));
}
WinGLTestContext::~WinGLTestContext() {
this->teardown();
this->destroyGLContext();
}
void WinGLTestContext::destroyGLContext() {
fPbufferContext = nullptr;
if (fGlRenderContext) {
// This deletes the context immediately even if it is current.
wglDeleteContext(fGlRenderContext);
fGlRenderContext = 0;
}
if (fWindow && fDeviceContext) {
ReleaseDC(fWindow, fDeviceContext);
fDeviceContext = 0;
}
if (fWindow) {
DestroyWindow(fWindow);
fWindow = 0;
}
}
void WinGLTestContext::onPlatformMakeCurrent() const {
HDC dc;
HGLRC glrc;
if (nullptr == fPbufferContext) {
dc = fDeviceContext;
glrc = fGlRenderContext;
} else {
dc = fPbufferContext->getDC();
glrc = fPbufferContext->getGLRC();
}
if (!wglMakeCurrent(dc, glrc)) {
SkDebugf("Could not create rendering context.\n");
}
}
std::function<void()> WinGLTestContext::onPlatformGetAutoContextRestore() const {
if (wglGetCurrentContext() == fGlRenderContext) {
return nullptr;
}
return context_restorer();
}
void WinGLTestContext::onPlatformSwapBuffers() const {
HDC dc;
if (nullptr == fPbufferContext) {
dc = fDeviceContext;
} else {
dc = fPbufferContext->getDC();
}
if (!SwapBuffers(dc)) {
SkDebugf("Could not complete SwapBuffers.\n");
}
}
GrGLFuncPtr WinGLTestContext::onPlatformGetProcAddress(const char* name) const {
return reinterpret_cast<GrGLFuncPtr>(wglGetProcAddress(name));
}
} // anonymous namespace
namespace sk_gpu_test {
GLTestContext* CreatePlatformGLTestContext(GrGLStandard forcedGpuAPI,
GLTestContext *shareContext) {
WinGLTestContext* winShareContext = reinterpret_cast<WinGLTestContext*>(shareContext);
WinGLTestContext *ctx = new WinGLTestContext(forcedGpuAPI, winShareContext);
if (!ctx->isValid()) {
delete ctx;
return nullptr;
}
return ctx;
}
} // namespace sk_gpu_test
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