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include/sokol/sokol_glue.h

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+#if defined(SOKOL_IMPL) && !defined(SOKOL_GLUE_IMPL)
+#define SOKOL_GLUE_IMPL
+#endif
+#ifndef SOKOL_GLUE_INCLUDED
+/*
+    sokol_glue.h -- glue helper functions for sokol headers
+
+    Project URL: https://github.com/floooh/sokol
+
+    Do this:
+        #define SOKOL_IMPL or
+        #define SOKOL_GLUE_IMPL
+    before you include this file in *one* C or C++ file to create the
+    implementation.
+
+    ...optionally provide the following macros to override defaults:
+
+    SOKOL_ASSERT(c)     - your own assert macro (default: assert(c))
+    SOKOL_GLUE_API_DECL - public function declaration prefix (default: extern)
+    SOKOL_API_DECL      - same as SOKOL_GLUE_API_DECL
+    SOKOL_API_IMPL      - public function implementation prefix (default: -)
+
+    If sokol_glue.h is compiled as a DLL, define the following before
+    including the declaration or implementation:
+
+    SOKOL_DLL
+
+    On Windows, SOKOL_DLL will define SOKOL_GLUE_API_DECL as __declspec(dllexport)
+    or __declspec(dllimport) as needed.
+
+    OVERVIEW
+    ========
+    sokol_glue.h provides glue helper functions between sokol_gfx.h and sokol_app.h,
+    so that sokol_gfx.h doesn't need to depend on sokol_app.h but can be
+    used with different window system glue libraries.
+
+    PROVIDED FUNCTIONS
+    ==================
+
+    sg_environment sglue_environment(void)
+
+        Returns an sg_environment struct initialized by calling sokol_app.h
+        functions. Use this in the sg_setup() call like this:
+
+        sg_setup(&(sg_desc){
+            .environment = sglue_environment(),
+            ...
+        });
+
+    sg_swapchain sglue_swapchain(void)
+
+        Returns an sg_swapchain struct initialized by calling sokol_app.h
+        functions. Use this in sg_begin_pass() for a 'swapchain pass' like
+        this:
+
+        sg_begin_pass(&(sg_pass){ .swapchain = sglue_swapchain(), ... });
+
+    LICENSE
+    =======
+    zlib/libpng license
+
+    Copyright (c) 2018 Andre Weissflog
+
+    This software is provided 'as-is', without any express or implied warranty.
+    In no event will the authors be held liable for any damages arising from the
+    use of this software.
+
+    Permission is granted to anyone to use this software for any purpose,
+    including commercial applications, and to alter it and redistribute it
+    freely, subject to the following restrictions:
+
+        1. The origin of this software must not be misrepresented; you must not
+        claim that you wrote the original software. If you use this software in a
+        product, an acknowledgment in the product documentation would be
+        appreciated but is not required.
+
+        2. Altered source versions must be plainly marked as such, and must not
+        be misrepresented as being the original software.
+
+        3. This notice may not be removed or altered from any source
+        distribution.
+*/
+#define SOKOL_GLUE_INCLUDED
+
+#if defined(SOKOL_API_DECL) && !defined(SOKOL_GLUE_API_DECL)
+#define SOKOL_GLUE_API_DECL SOKOL_API_DECL
+#endif
+#ifndef SOKOL_GLUE_API_DECL
+#if defined(_WIN32) && defined(SOKOL_DLL) && defined(SOKOL_GLUE_IMPL)
+#define SOKOL_GLUE_API_DECL __declspec(dllexport)
+#elif defined(_WIN32) && defined(SOKOL_DLL)
+#define SOKOL_GLUE_API_DECL __declspec(dllimport)
+#else
+#define SOKOL_GLUE_API_DECL extern
+#endif
+#endif
+
+#ifndef SOKOL_GFX_INCLUDED
+#error "Please include sokol_gfx.h before sokol_glue.h"
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+SOKOL_GLUE_API_DECL sg_environment sglue_environment(void);
+SOKOL_GLUE_API_DECL sg_swapchain sglue_swapchain(void);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+#endif /* SOKOL_GLUE_INCLUDED */
+
+/*-- IMPLEMENTATION ----------------------------------------------------------*/
+#ifdef SOKOL_GLUE_IMPL
+#define SOKOL_GLUE_IMPL_INCLUDED (1)
+#include <string.h> /* memset */
+
+#ifndef SOKOL_APP_INCLUDED
+#error "Please include sokol_app.h before the sokol_glue.h implementation"
+#endif
+
+#ifndef SOKOL_API_IMPL
+#define SOKOL_API_IMPL
+#endif
+
+
+SOKOL_API_IMPL sg_environment sglue_environment(void) {
+    sg_environment env;
+    memset(&env, 0, sizeof(env));
+    env.defaults.color_format = (sg_pixel_format) sapp_color_format();
+    env.defaults.depth_format = (sg_pixel_format) sapp_depth_format();
+    env.defaults.sample_count = sapp_sample_count();
+    env.metal.device = sapp_metal_get_device();
+    env.d3d11.device = sapp_d3d11_get_device();
+    env.d3d11.device_context = sapp_d3d11_get_device_context();
+    env.wgpu.device = sapp_wgpu_get_device();
+    return env;
+}
+
+SOKOL_API_IMPL sg_swapchain sglue_swapchain(void) {
+    sg_swapchain swapchain;
+    memset(&swapchain, 0, sizeof(swapchain));
+    swapchain.width = sapp_width();
+    swapchain.height = sapp_height();
+    swapchain.sample_count = sapp_sample_count();
+    swapchain.color_format = (sg_pixel_format)sapp_color_format();
+    swapchain.depth_format = (sg_pixel_format)sapp_depth_format();
+    swapchain.metal.current_drawable = sapp_metal_get_current_drawable();
+    swapchain.metal.depth_stencil_texture = sapp_metal_get_depth_stencil_texture();
+    swapchain.metal.msaa_color_texture = sapp_metal_get_msaa_color_texture();
+    swapchain.d3d11.render_view = sapp_d3d11_get_render_view();
+    swapchain.d3d11.resolve_view = sapp_d3d11_get_resolve_view();
+    swapchain.d3d11.depth_stencil_view = sapp_d3d11_get_depth_stencil_view();
+    swapchain.wgpu.render_view = sapp_wgpu_get_render_view();
+    swapchain.wgpu.resolve_view = sapp_wgpu_get_resolve_view();
+    swapchain.wgpu.depth_stencil_view = sapp_wgpu_get_depth_stencil_view();
+    swapchain.gl.framebuffer = sapp_gl_get_framebuffer();
+    return swapchain;
+}
+
+#endif /* SOKOL_GLUE_IMPL */