Move implementation source files to a conventional src directory

I think this attempt to be optionally header-only was misguided, particularly
installing source code to the system include path.  Typically anyone vendoring
code just includes the repository and builds from there anyway.

This commit moves all the implementation code to a typical src directory (Don't
Be Weird).

I still think there is some value in simple "inline" deployment, but that would
be better achieved another way, like producing a single-file amalgamation that
builds anywhere, ala sqlite.

1 files changed, 171 insertions, 0 deletions

diff --git a/src/x11_cairo.c b/src/x11_cairo.c
new file mode 100644
index 0000000..f0b38a9
--- /dev/null
+++ b/src/x11_cairo.c
@@ -0,0 +1,171 @@
+/*
+  Copyright 2012-2020 David Robillard <d@drobilla.net>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+/**
+   @file x11_cairo.c
+   @brief Cairo graphics backend for X11.
+*/
+
+#include "types.h"
+#include "x11.h"
+
+#include "pugl/pugl.h"
+#include "pugl/pugl_cairo.h"
+
+#include <X11/Xutil.h>
+#include <cairo-xlib.h>
+#include <cairo.h>
+
+#include <stdlib.h>
+
+typedef struct {
+	cairo_surface_t* back;
+	cairo_surface_t* front;
+	cairo_t*         cr;
+} PuglX11CairoSurface;
+
+static void
+puglX11CairoClose(PuglView* view)
+{
+	PuglInternals* const       impl    = view->impl;
+	PuglX11CairoSurface* const surface = (PuglX11CairoSurface*)impl->surface;
+
+	cairo_surface_destroy(surface->front);
+	cairo_surface_destroy(surface->back);
+	surface->front = surface->back = NULL;
+}
+
+static PuglStatus
+puglX11CairoOpen(PuglView* view)
+{
+	PuglInternals* const       impl    = view->impl;
+	PuglX11CairoSurface* const surface = (PuglX11CairoSurface*)impl->surface;
+
+	surface->back = cairo_xlib_surface_create(impl->display,
+	                                          impl->win,
+	                                          impl->vi->visual,
+	                                          (int)view->frame.width,
+	                                          (int)view->frame.height);
+
+	surface->front = cairo_surface_create_similar(
+	        surface->back,
+	        cairo_surface_get_content(surface->back),
+	        (int)view->frame.width,
+	        (int)view->frame.height);
+
+	if (cairo_surface_status(surface->back) ||
+	    cairo_surface_status(surface->front)) {
+		puglX11CairoClose(view);
+		return PUGL_CREATE_CONTEXT_FAILED;
+	}
+
+	return PUGL_SUCCESS;
+}
+
+static PuglStatus
+puglX11CairoCreate(PuglView* view)
+{
+	PuglInternals* const impl = view->impl;
+
+	impl->surface = (cairo_surface_t*)calloc(1, sizeof(PuglX11CairoSurface));
+
+	return PUGL_SUCCESS;
+}
+
+static PuglStatus
+puglX11CairoDestroy(PuglView* view)
+{
+	PuglInternals* const       impl    = view->impl;
+	PuglX11CairoSurface* const surface = (PuglX11CairoSurface*)impl->surface;
+
+	puglX11CairoClose(view);
+	free(surface);
+
+	return PUGL_SUCCESS;
+}
+
+static PuglStatus
+puglX11CairoEnter(PuglView* view, const PuglEventExpose* expose)
+{
+	PuglInternals* const       impl    = view->impl;
+	PuglX11CairoSurface* const surface = (PuglX11CairoSurface*)impl->surface;
+	PuglStatus                 st      = PUGL_SUCCESS;
+
+	if (expose && !(st = puglX11CairoOpen(view))) {
+		surface->cr = cairo_create(surface->front);
+
+		if (cairo_status(surface->cr)) {
+			st = PUGL_CREATE_CONTEXT_FAILED;
+		}
+	}
+
+	return st;
+}
+
+static PuglStatus
+puglX11CairoLeave(PuglView* view, const PuglEventExpose* expose)
+{
+	PuglInternals* const       impl    = view->impl;
+	PuglX11CairoSurface* const surface = (PuglX11CairoSurface*)impl->surface;
+
+	if (expose) {
+		// Destroy front context and create a new one for drawing to the back
+		cairo_destroy(surface->cr);
+		surface->cr = cairo_create(surface->back);
+
+		// Clip to expose region
+		cairo_rectangle(surface->cr,
+		                expose->x,
+		                expose->y,
+		                expose->width,
+		                expose->height);
+		cairo_clip(surface->cr);
+
+		// Paint front onto back
+		cairo_set_source_surface(surface->cr, surface->front, 0, 0);
+		cairo_paint(surface->cr);
+
+		// Flush to X and close everything
+		cairo_destroy(surface->cr);
+		cairo_surface_flush(surface->back);
+		puglX11CairoClose(view);
+		surface->cr = NULL;
+	}
+
+	return PUGL_SUCCESS;
+}
+
+static void*
+puglX11CairoGetContext(PuglView* view)
+{
+	PuglInternals* const       impl    = view->impl;
+	PuglX11CairoSurface* const surface = (PuglX11CairoSurface*)impl->surface;
+
+	return surface->cr;
+}
+
+const PuglBackend*
+puglCairoBackend(void)
+{
+	static const PuglBackend backend = {puglX11StubConfigure,
+	                                    puglX11CairoCreate,
+	                                    puglX11CairoDestroy,
+	                                    puglX11CairoEnter,
+	                                    puglX11CairoLeave,
+	                                    puglX11CairoGetContext};
+
+	return &backend;
+}