You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
130 lines
3.8 KiB
130 lines
3.8 KiB
|
|
/*
|
|
* Copyright 2017 Google Inc.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
|
|
#include "../GLWindowContext.h"
|
|
#include "SkCanvas.h"
|
|
#include "SkColorFilter.h"
|
|
#include "WindowContextFactory_ios.h"
|
|
#include "gl/GrGLInterface.h"
|
|
#include "sk_tool_utils.h"
|
|
|
|
#include <OpenGLES/ES2/gl.h>
|
|
|
|
#include "SDL.h"
|
|
|
|
using sk_app::DisplayParams;
|
|
using sk_app::window_context_factory::IOSWindowInfo;
|
|
using sk_app::GLWindowContext;
|
|
|
|
namespace {
|
|
|
|
// We use SDL to support Mac windowing mainly for convenience's sake. However, it
|
|
// does not allow us to support a purely raster backend because we have no hooks into
|
|
// the NSWindow's drawRect: method. Hence we use GL to handle the update. Should we
|
|
// want to avoid this, we will probably need to write our own windowing backend.
|
|
|
|
class RasterWindowContext_ios : public GLWindowContext {
|
|
public:
|
|
RasterWindowContext_ios(const IOSWindowInfo&, const DisplayParams&);
|
|
|
|
~RasterWindowContext_ios() override;
|
|
|
|
sk_sp<SkSurface> getBackbufferSurface() override;
|
|
|
|
void onSwapBuffers() override;
|
|
|
|
sk_sp<const GrGLInterface> onInitializeContext() override;
|
|
void onDestroyContext() override;
|
|
|
|
private:
|
|
SDL_Window* fWindow;
|
|
SDL_GLContext fGLContext;
|
|
sk_sp<SkSurface> fBackbufferSurface;
|
|
|
|
typedef GLWindowContext INHERITED;
|
|
};
|
|
|
|
RasterWindowContext_ios::RasterWindowContext_ios(const IOSWindowInfo& info,
|
|
const DisplayParams& params)
|
|
: INHERITED(params)
|
|
, fWindow(info.fWindow)
|
|
, fGLContext(nullptr) {
|
|
|
|
// any config code here (particularly for msaa)?
|
|
|
|
this->initializeContext();
|
|
}
|
|
|
|
RasterWindowContext_ios::~RasterWindowContext_ios() {
|
|
this->destroyContext();
|
|
}
|
|
|
|
sk_sp<const GrGLInterface> RasterWindowContext_ios::onInitializeContext() {
|
|
SkASSERT(fWindow);
|
|
SkASSERT(fGLContext);
|
|
|
|
if (0 == SDL_GL_MakeCurrent(fWindow, fGLContext)) {
|
|
glClearStencil(0);
|
|
glClearColor(0, 0, 0, 0);
|
|
glStencilMask(0xffffffff);
|
|
glClear(GL_STENCIL_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
|
|
|
|
SDL_GL_GetAttribute(SDL_GL_STENCIL_SIZE, &fStencilBits);
|
|
SDL_GL_GetAttribute(SDL_GL_MULTISAMPLESAMPLES, &fSampleCount);
|
|
fSampleCount = SkTMax(fSampleCount, 1);
|
|
|
|
SDL_GL_GetDrawableSize(fWindow, &fWidth, &fHeight);
|
|
glViewport(0, 0, fWidth, fHeight);
|
|
} else {
|
|
SkDebugf("MakeCurrent failed: %s\n", SDL_GetError());
|
|
}
|
|
|
|
// make the offscreen image
|
|
SkImageInfo info = SkImageInfo::Make(fWidth, fHeight, fDisplayParams.fColorType,
|
|
kPremul_SkAlphaType, fDisplayParams.fColorSpace);
|
|
fBackbufferSurface = SkSurface::MakeRaster(info);
|
|
return GrGLMakeNativeInterface();
|
|
}
|
|
|
|
void RasterWindowContext_ios::onDestroyContext() {
|
|
fBackbufferSurface.reset(nullptr);
|
|
}
|
|
|
|
sk_sp<SkSurface> RasterWindowContext_ios::getBackbufferSurface() { return fBackbufferSurface; }
|
|
|
|
void RasterWindowContext_ios::onSwapBuffers() {
|
|
if (fWindow && fGLContext) {
|
|
// We made/have an off-screen surface. Get the contents as an SkImage:
|
|
sk_sp<SkImage> snapshot = fBackbufferSurface->makeImageSnapshot();
|
|
|
|
sk_sp<SkSurface> gpuSurface = INHERITED::getBackbufferSurface();
|
|
SkCanvas* gpuCanvas = gpuSurface->getCanvas();
|
|
gpuCanvas->drawImage(snapshot, 0, 0);
|
|
gpuCanvas->flush();
|
|
|
|
SDL_GL_SwapWindow(fWindow);
|
|
}
|
|
}
|
|
|
|
} // anonymous namespace
|
|
|
|
namespace sk_app {
|
|
namespace window_context_factory {
|
|
|
|
WindowContext* NewRasterForIOS(const IOSWindowInfo& info, const DisplayParams& params) {
|
|
WindowContext* ctx = new RasterWindowContext_ios(info, params);
|
|
if (!ctx->isValid()) {
|
|
delete ctx;
|
|
return nullptr;
|
|
}
|
|
return ctx;
|
|
}
|
|
|
|
} // namespace window_context_factory
|
|
} // namespace sk_app
|