| /* |
| * Copyright 2020 Google LLC |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include <emscripten.h> |
| #include <emscripten/bind.h> |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkSurface.h" |
| #include "include/gpu/GrContext.h" |
| #include "tools/skui/InputState.h" |
| #include "tools/skui/ModifierKey.h" |
| #include "tools/viewer/SKPSlide.h" |
| #include "tools/viewer/SampleSlide.h" |
| #include "tools/viewer/SvgSlide.h" |
| #include <GLES3/gl3.h> |
| #include <string> |
| |
| using namespace emscripten; |
| |
| static sk_sp<Slide> MakeSlide(std::string name) { |
| if (name == "PathText") { |
| extern Sample* MakePathTextSample(); |
| return sk_make_sp<SampleSlide>(MakePathTextSample); |
| } |
| if (name == "TessellatedWedge") { |
| extern Sample* MakeTessellatedWedgeSample(); |
| return sk_make_sp<SampleSlide>(MakeTessellatedWedgeSample); |
| } |
| return nullptr; |
| } |
| |
| static sk_sp<Slide> MakeSkpSlide(std::string name, std::string skpData) { |
| auto stream = std::make_unique<SkMemoryStream>(skpData.data(), skpData.size(), |
| /*copyData=*/true); |
| return sk_make_sp<SKPSlide>(SkString(name.c_str()), std::move(stream)); |
| } |
| |
| static sk_sp<Slide> MakeSvgSlide(std::string name, std::string svgText) { |
| auto stream = std::make_unique<SkMemoryStream>(svgText.data(), svgText.size(), |
| /*copyData=*/true); |
| return sk_make_sp<SvgSlide>(SkString(name.c_str()), std::move(stream)); |
| } |
| |
| static void delete_wrapped_framebuffer(SkSurface::ReleaseContext context) { |
| GLuint framebuffer = (GLuint)context; |
| glDeleteFramebuffers(1, &framebuffer); |
| } |
| |
| static sk_sp<SkSurface> MakeOffscreenFramebuffer(sk_sp<GrContext> grContext, int width, int height, |
| int sampleCnt) { |
| GLuint colorBuffer; |
| glGenRenderbuffers(1, &colorBuffer); |
| glBindRenderbuffer(GL_RENDERBUFFER, colorBuffer); |
| glRenderbufferStorageMultisample(GL_RENDERBUFFER, sampleCnt, GL_RGBA8, width, height); |
| |
| GLuint stencilBuffer; |
| glGenRenderbuffers(1, &stencilBuffer); |
| glBindRenderbuffer(GL_RENDERBUFFER, stencilBuffer); |
| glRenderbufferStorageMultisample(GL_RENDERBUFFER, sampleCnt, GL_STENCIL_INDEX8, width, height); |
| |
| GLuint framebuffer; |
| glGenFramebuffers(1, &framebuffer); |
| glBindFramebuffer(GL_FRAMEBUFFER, framebuffer); |
| glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, |
| colorBuffer); |
| glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, |
| stencilBuffer); |
| |
| // Unbind "framebuffer" before orphaning its renderbuffers. (Otherwise they are spec'd to be |
| // detached from the currently bound framebuffer.) |
| glBindFramebuffer(GL_FRAMEBUFFER, 0); |
| glDeleteRenderbuffers(1, &colorBuffer); |
| glDeleteRenderbuffers(1, &stencilBuffer); |
| |
| grContext->resetContext(kRenderTarget_GrGLBackendState); |
| |
| GrGLFramebufferInfo glInfo; |
| glInfo.fFBOID = framebuffer; |
| glInfo.fFormat = GL_RGBA8; |
| GrBackendRenderTarget backendRenderTarget(width, height, sampleCnt, 8, glInfo); |
| return SkSurface::MakeFromBackendRenderTarget(grContext.get(), backendRenderTarget, |
| kBottomLeft_GrSurfaceOrigin, |
| SkColorType::kRGBA_8888_SkColorType, nullptr, |
| nullptr, &delete_wrapped_framebuffer, |
| (SkSurface::ReleaseContext)framebuffer); |
| } |
| |
| enum class GLFilter { |
| kNearest = GL_NEAREST, |
| kLinear = GL_LINEAR |
| }; |
| |
| static void BlitOffscreenFramebuffer(sk_sp<SkSurface> surface, int srcX0, int srcY0, int srcX1, int |
| srcY1, int dstX0, int dstY0, int dstX1, int dstY1, |
| GLFilter filter) { |
| surface->flush(SkSurface::BackendSurfaceAccess::kPresent, GrFlushInfo()); |
| GrGLFramebufferInfo glInfo; |
| auto backendRT = surface->getBackendRenderTarget(SkSurface::kFlushRead_BackendHandleAccess); |
| backendRT.getGLFramebufferInfo(&glInfo); |
| glBindFramebuffer(GL_READ_FRAMEBUFFER, glInfo.fFBOID); |
| glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0); |
| glBlitFramebuffer(srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, GL_COLOR_BUFFER_BIT, |
| (GLenum)filter); |
| surface->getContext()->resetContext(kRenderTarget_GrGLBackendState); |
| } |
| |
| EMSCRIPTEN_BINDINGS(Viewer) { |
| function("MakeSlide", &MakeSlide); |
| function("MakeSkpSlide", &MakeSkpSlide); |
| function("MakeSvgSlide", &MakeSvgSlide); |
| function("MakeOffscreenFramebuffer", &MakeOffscreenFramebuffer); |
| function("BlitOffscreenFramebuffer", &BlitOffscreenFramebuffer); |
| class_<Slide>("Slide") |
| .smart_ptr<sk_sp<Slide>>("sk_sp<Slide>") |
| .function("load", &Slide::load) |
| .function("animate", &Slide::animate) |
| .function("draw", optional_override([](Slide& self, SkCanvas& canvas) { |
| self.draw(&canvas); |
| })) |
| .function("onChar", &Slide::onChar) |
| .function("onMouse", &Slide::onMouse); |
| enum_<GLFilter>("GLFilter") |
| .value("Nearest", GLFilter::kNearest) |
| .value("Linear", GLFilter::kLinear); |
| enum_<skui::InputState>("InputState") |
| .value("Down", skui::InputState::kDown) |
| .value("Up", skui::InputState::kUp) |
| .value("Move", skui::InputState::kMove) |
| .value("Right", skui::InputState::kRight) |
| .value("Left", skui::InputState::kLeft); |
| enum_<skui::ModifierKey>("ModifierKey") |
| .value("None", skui::ModifierKey::kNone) |
| .value("Shift", skui::ModifierKey::kShift) |
| .value("Control", skui::ModifierKey::kControl) |
| .value("Option", skui::ModifierKey::kOption) |
| .value("Command", skui::ModifierKey::kCommand) |
| .value("FirstPress", skui::ModifierKey::kFirstPress); |
| } |