html5 glcontext
This commit is contained in:
Vladimir Vukicevic
Бранимир Караџић
Родитель
0479b4bda3
Коммит
142470237e
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@ -9,6 +9,7 @@
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#include "glcontext_egl.cpp"
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#include "glcontext_glx.cpp"
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#include "glcontext_wgl.cpp"
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#include "glcontext_html5.cpp"
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#include "nvapi.cpp"
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#include "renderer_d3d11.cpp"
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#include "renderer_d3d12.cpp"
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@ -0,0 +1,191 @@
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/*
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* Copyright 2011-2019 Branimir Karadzic. All rights reserved.
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* License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause
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*/
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#include "bgfx_p.h"
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#if BGFX_CONFIG_RENDERER_OPENGLES
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# include "renderer_gl.h"
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# if BGFX_USE_HTML5
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#include <emscripten/emscripten.h>
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#include <emscripten/html5.h>
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// from emscripten gl.c, because we're not going to go
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// through egl
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extern "C" void* emscripten_GetProcAddress(const char *name_);
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namespace bgfx { namespace gl
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{
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# define GL_IMPORT(_optional, _proto, _func, _import) _proto _func = NULL
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# include "glimports.h"
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static EmscriptenWebGLContextAttributes s_attrs;
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struct SwapChainGL
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{
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SwapChainGL(int _context, const char* _canvas)
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: m_context(_context)
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{
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BX_ALLOC(g_allocator, strlen(_canvas) + 1);
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strcpy(m_canvas, _canvas);
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makeCurrent();
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GL_CHECK(glClearColor(0.0f, 0.0f, 0.0f, 0.0f) );
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GL_CHECK(glClear(GL_COLOR_BUFFER_BIT) );
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swapBuffers();
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GL_CHECK(glClear(GL_COLOR_BUFFER_BIT) );
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swapBuffers();
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}
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~SwapChainGL()
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{
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emscripten_webgl_destroy_context(m_context);
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BX_FREE(g_allocator, m_canvas);
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}
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void makeCurrent()
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{
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emscripten_webgl_make_context_current(m_context);
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}
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void swapBuffers()
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{
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// There is no swapBuffers equivalent. A swap happens whenever control is returned back
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// to the browser.
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}
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int m_context;
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char* m_canvas;
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};
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void GlContext::create(uint32_t _width, uint32_t _height)
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{
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// assert?
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if (m_primary != NULL)
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return;
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const char* canvas = (const char*) g_platformData.nwh; // if 0, Module.canvas is used
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m_primary = createSwapChain((void*)canvas);
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if (_width && _height)
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emscripten_set_canvas_element_size(canvas, (int)_width, (int)_height);
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makeCurrent(m_primary);
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}
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void GlContext::destroy()
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{
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if (m_primary)
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{
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if (m_current == m_primary)
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m_current = NULL;
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BX_DELETE(g_allocator, m_primary);
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m_primary = NULL;
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}
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}
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void GlContext::resize(uint32_t _width, uint32_t _height, uint32_t /* _flags */)
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{
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if (m_primary == NULL)
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return;
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emscripten_set_canvas_element_size(m_primary->m_canvas, (int) _width, (int) _height);
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}
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SwapChainGL* GlContext::createSwapChain(void* _nwh)
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{
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emscripten_webgl_init_context_attributes(&s_attrs);
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s_attrs.alpha = false;
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s_attrs.depth = true;
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s_attrs.stencil = true;
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s_attrs.enableExtensionsByDefault = true;
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// let emscripten figure out the best WebGL context to create
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// TODO this isn't necessarily the right thing, I don't think the code actually does the fallback like it should
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s_attrs.majorVersion = 0;
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s_attrs.majorVersion = 0;
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const char* canvas = (const char*) _nwh;
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int context = emscripten_webgl_create_context(canvas, &s_attrs);
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if (context <= 0)
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{
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BX_TRACE("Failed to create WebGL context. (Canvas handle: '%s', error %d)", canvas, (int)context);
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return NULL;
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}
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int result = emscripten_webgl_make_context_current(context);
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if (EMSCRIPTEN_RESULT_SUCCESS != result)
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{
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BX_TRACE("emscripten_webgl_make_context_current failed (%d)", result);
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return NULL;
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}
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SwapChainGL* swapChain = BX_NEW(g_allocator, SwapChainGL)(context, canvas);
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import();
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return swapChain;
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}
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uint64_t GlContext::getCaps() const
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{
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return BGFX_CAPS_SWAP_CHAIN;
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}
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void GlContext::destroySwapChain(SwapChainGL* _swapChain)
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{
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BX_DELETE(g_allocator, _swapChain);
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}
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void GlContext::swap(SwapChainGL* /* _swapChain */)
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{
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}
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void GlContext::makeCurrent(SwapChainGL* _swapChain)
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{
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if (m_current != _swapChain)
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{
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m_current = _swapChain;
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if (NULL == _swapChain)
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{
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if (NULL != m_primary)
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{
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m_primary->makeCurrent();
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}
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}
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else
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{
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_swapChain->makeCurrent();
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}
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}
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}
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void GlContext::import()
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{
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BX_TRACE("Import:");
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# define GL_EXTENSION(_optional, _proto, _func, _import) \
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{ \
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if (NULL == _func) \
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{ \
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_func = (_proto)emscripten_GetProcAddress(#_import); \
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BX_TRACE("\t%p " #_func " (" #_import ")", _func); \
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BGFX_FATAL(_optional || NULL != _func, Fatal::UnableToInitialize, "Failed to create WebGL/OpenGLES context. GetProcAddress(\"%s\")", #_import); \
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} \
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}
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# include "glimports.h"
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}
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} /* namespace gl */ } // namespace bgfx
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# endif // BGFX_USE_EGL
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#endif // (BGFX_CONFIG_RENDERER_OPENGLES || BGFX_CONFIG_RENDERER_OPENGL)
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@ -0,0 +1,47 @@
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/*
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* Copyright 2011-2019 Branimir Karadzic. All rights reserved.
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* License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause
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*/
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#ifndef BGFX_GLCONTEXT_HTML5_H_HEADER_GUARD
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#define BGFX_GLCONTEXT_HTML5_H_HEADER_GUARD
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#if BGFX_USE_HTML5
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namespace bgfx { namespace gl
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{
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struct SwapChainGL;
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struct GlContext
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{
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GlContext()
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: m_current(NULL)
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, m_primary(NULL)
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{
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}
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void create(uint32_t _width, uint32_t _height);
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void destroy();
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void resize(uint32_t _width, uint32_t _height, uint32_t _flags);
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uint64_t getCaps() const;
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SwapChainGL* createSwapChain(void* _nwh);
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void destroySwapChain(SwapChainGL* _swapChain);
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void swap(SwapChainGL* _swapChain = NULL);
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void makeCurrent(SwapChainGL* _swapChain = NULL);
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void import();
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bool isValid() const
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{
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return NULL != m_primary;
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}
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SwapChainGL* m_current;
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SwapChainGL* m_primary;
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};
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} /* namespace gl */ } // namespace bgfx
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#endif // BGFX_USE_HTML5
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#endif // BGFX_GLCONTEXT_HTML5_H_HEADER_GUARD
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@ -9,7 +9,6 @@
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#define BGFX_USE_EGL (BGFX_CONFIG_RENDERER_OPENGLES && (0 \
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|| BX_PLATFORM_ANDROID \
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|| BX_PLATFORM_BSD \
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|| BX_PLATFORM_EMSCRIPTEN \
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|| BX_PLATFORM_LINUX \
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|| BX_PLATFORM_NX \
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|| BX_PLATFORM_RPI \
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|| BX_PLATFORM_WINDOWS \
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) )
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#define BGFX_USE_HTML5 (BGFX_CONFIG_RENDERER_OPENGLES && (0 \
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|| BX_PLATFORM_EMSCRIPTEN \
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) )
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#define BGFX_USE_WGL (BGFX_CONFIG_RENDERER_OPENGL && BX_PLATFORM_WINDOWS)
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#define BGFX_USE_GLX (BGFX_CONFIG_RENDERER_OPENGL && (0 \
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|| BX_PLATFORM_BSD \
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@ -125,6 +128,10 @@ typedef uint64_t GLuint64;
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# include "glcontext_egl.h"
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# endif // BGFX_USE_EGL
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# if BGFX_USE_HTML5
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# include "glcontext_html5.h"
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# endif // BGFX_USE_EGL
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# if BX_PLATFORM_EMSCRIPTEN
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# include <emscripten/emscripten.h>
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# endif // BX_PLATFORM_EMSCRIPTEN
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