48825b11ad
Old: 0 -> nonMSAA
1+ -> MSAA
New:
0 -> error/unsupported
1 -> nonMSAA
2+ -> MSAA
We still allow 0 to mean nonMSAA in three sets of public APIs for backwards compatibility:
1) SkSurface factories
2) GrBackendRenderTarget constructors
3) GrCaps::getSampleCnt()'s requestedCount parameter
However, we immediately clamp to 1 and treat 0 as invalid/non-renderable internally.
This also changes the behavior when using a large sample count. We now fail in that case rather than using the largest sample available sample count. GrCaps::getSampleCount() will return 0 in this case.
Bug: skia:
Change-Id: Ida22c6b22c1365e563c9046b611e88bf5eb3ff33
Reviewed-on: https://skia-review.googlesource.com/101560
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
111 lines
2.7 KiB
C++
111 lines
2.7 KiB
C++
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/*
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* Copyright 2016 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include <OpenGL/gl.h>
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#include "../GLWindowContext.h"
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#include "SDL.h"
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#include "WindowContextFactory_mac.h"
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#include "gl/GrGLInterface.h"
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using sk_app::DisplayParams;
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using sk_app::window_context_factory::MacWindowInfo;
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using sk_app::GLWindowContext;
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namespace {
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class GLWindowContext_mac : public GLWindowContext {
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public:
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GLWindowContext_mac(const MacWindowInfo&, const DisplayParams&);
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~GLWindowContext_mac() override;
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void onSwapBuffers() override;
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sk_sp<const GrGLInterface> onInitializeContext() override;
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void onDestroyContext() override;
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private:
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SDL_Window* fWindow;
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SDL_GLContext fGLContext;
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typedef GLWindowContext INHERITED;
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};
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GLWindowContext_mac::GLWindowContext_mac(const MacWindowInfo& info, const DisplayParams& params)
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: INHERITED(params)
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, fWindow(info.fWindow)
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, fGLContext(nullptr) {
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// any config code here (particularly for msaa)?
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this->initializeContext();
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}
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GLWindowContext_mac::~GLWindowContext_mac() {
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this->destroyContext();
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}
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sk_sp<const GrGLInterface> GLWindowContext_mac::onInitializeContext() {
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SkASSERT(fWindow);
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fGLContext = SDL_GL_CreateContext(fWindow);
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if (!fGLContext) {
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SkDebugf("%s\n", SDL_GetError());
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return nullptr;
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}
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if (0 == SDL_GL_MakeCurrent(fWindow, fGLContext)) {
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glClearStencil(0);
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glClearColor(0, 0, 0, 0);
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glStencilMask(0xffffffff);
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glClear(GL_STENCIL_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
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SDL_GL_GetAttribute(SDL_GL_STENCIL_SIZE, &fStencilBits);
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SDL_GL_GetAttribute(SDL_GL_MULTISAMPLESAMPLES, &fSampleCount);
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fSampleCount = SkTMax(fSampleCount, 1);
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SDL_GetWindowSize(fWindow, &fWidth, &fHeight);
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glViewport(0, 0, fWidth, fHeight);
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} else {
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SkDebugf("MakeCurrent failed: %s\n", SDL_GetError());
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}
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return GrGLMakeNativeInterface();
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}
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void GLWindowContext_mac::onDestroyContext() {
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if (!fWindow || !fGLContext) {
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return;
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}
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SDL_GL_DeleteContext(fGLContext);
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fGLContext = nullptr;
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}
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void GLWindowContext_mac::onSwapBuffers() {
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if (fWindow && fGLContext) {
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SDL_GL_SwapWindow(fWindow);
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}
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}
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} // anonymous namespace
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namespace sk_app {
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namespace window_context_factory {
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WindowContext* NewGLForMac(const MacWindowInfo& info, const DisplayParams& params) {
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WindowContext* ctx = new GLWindowContext_mac(info, params);
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if (!ctx->isValid()) {
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delete ctx;
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return nullptr;
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}
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return ctx;
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}
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} // namespace window_context_factory
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} // namespace sk_app
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