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+/*
+ Copyright 2012-2016 David Robillard <http://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 pugl_internal.h Private platform-independent definitions.
+
+ Note this file contains function definitions, so it must be compiled into
+ the final binary exactly once. Each platform specific implementation file
+ including it once should achieve this.
+
+ If you are copying the pugl code into your source tree, the following
+ symbols can be defined to tweak pugl behaviour:
+
+ PUGL_HAVE_CAIRO: Include Cairo support code.
+ PUGL_HAVE_GL: Include OpenGL support code.
+*/
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "pugl/pugl.h"
+
+typedef struct PuglInternalsImpl PuglInternals;
+
+struct PuglViewImpl {
+ PuglHandle handle;
+ PuglEventFunc eventFunc;
+
+ PuglInternals* impl;
+
+ char* windowClass;
+ PuglNativeWindow parent;
+ PuglContextType ctx_type;
+ uintptr_t transient_parent;
+
+ int width;
+ int height;
+ int min_width;
+ int min_height;
+ int min_aspect_x;
+ int min_aspect_y;
+ int max_aspect_x;
+ int max_aspect_y;
+ bool ignoreKeyRepeat;
+ bool redisplay;
+ bool resizable;
+ bool visible;
+};
+
+PuglInternals* puglInitInternals(void);
+
+PuglView*
+puglInit(int* pargc, char** argv)
+{
+ PuglView* view = (PuglView*)calloc(1, sizeof(PuglView));
+ if (!view) {
+ return NULL;
+ }
+
+ PuglInternals* impl = puglInitInternals();
+ if (!impl) {
+ return NULL;
+ }
+
+ view->ctx_type = PUGL_GL;
+ view->impl = impl;
+ view->width = 640;
+ view->height = 480;
+
+ return view;
+}
+
+void
+puglInitWindowSize(PuglView* view, int width, int height)
+{
+ view->width = width;
+ view->height = height;
+}
+
+void
+puglInitWindowMinSize(PuglView* view, int width, int height)
+{
+ view->min_width = width;
+ view->min_height = height;
+}
+
+void
+puglInitWindowAspectRatio(PuglView* view,
+ int min_x,
+ int min_y,
+ int max_x,
+ int max_y)
+{
+ view->min_aspect_x = min_x;
+ view->min_aspect_y = min_y;
+ view->max_aspect_x = max_x;
+ view->max_aspect_y = max_y;
+}
+
+void
+puglInitWindowClass(PuglView* view, const char* name)
+{
+ const size_t len = strlen(name);
+
+ free(view->windowClass);
+ view->windowClass = (char*)calloc(1, len + 1);
+ memcpy(view->windowClass, name, len);
+}
+
+void
+puglInitWindowParent(PuglView* view, PuglNativeWindow parent)
+{
+ view->parent = parent;
+}
+
+void
+puglInitResizable(PuglView* view, bool resizable)
+{
+ view->resizable = resizable;
+}
+
+void
+puglInitTransientFor(PuglView* view, uintptr_t parent)
+{
+ view->transient_parent = parent;
+}
+
+void
+puglInitContextType(PuglView* view, PuglContextType type)
+{
+ view->ctx_type = type;
+}
+
+void
+puglSetHandle(PuglView* view, PuglHandle handle)
+{
+ view->handle = handle;
+}
+
+PuglHandle
+puglGetHandle(PuglView* view)
+{
+ return view->handle;
+}
+
+bool
+puglGetVisible(PuglView* view)
+{
+ return view->visible;
+}
+
+void
+puglGetSize(PuglView* view, int* width, int* height)
+{
+ *width = view->width;
+ *height = view->height;
+}
+
+void
+puglIgnoreKeyRepeat(PuglView* view, bool ignore)
+{
+ view->ignoreKeyRepeat = ignore;
+}
+
+void
+puglSetEventFunc(PuglView* view, PuglEventFunc eventFunc)
+{
+ view->eventFunc = eventFunc;
+}
+
+/** Return the code point for buf, or the replacement character on error. */
+static uint32_t
+puglDecodeUTF8(const uint8_t* buf)
+{
+#define FAIL_IF(cond) { if (cond) return 0xFFFD; }
+
+ // http://en.wikipedia.org/wiki/UTF-8
+
+ if (buf[0] < 0x80) {
+ return buf[0];
+ } else if (buf[0] < 0xC2) {
+ return 0xFFFD;
+ } else if (buf[0] < 0xE0) {
+ FAIL_IF((buf[1] & 0xC0) != 0x80);
+ return (buf[0] << 6) + buf[1] - 0x3080;
+ } else if (buf[0] < 0xF0) {
+ FAIL_IF((buf[1] & 0xC0) != 0x80);
+ FAIL_IF(buf[0] == 0xE0 && buf[1] < 0xA0);
+ FAIL_IF((buf[2] & 0xC0) != 0x80);
+ return (buf[0] << 12) + (buf[1] << 6) + buf[2] - 0xE2080;
+ } else if (buf[0] < 0xF5) {
+ FAIL_IF((buf[1] & 0xC0) != 0x80);
+ FAIL_IF(buf[0] == 0xF0 && buf[1] < 0x90);
+ FAIL_IF(buf[0] == 0xF4 && buf[1] >= 0x90);
+ FAIL_IF((buf[2] & 0xC0) != 0x80);
+ FAIL_IF((buf[3] & 0xC0) != 0x80);
+ return ((buf[0] << 18) +
+ (buf[1] << 12) +
+ (buf[2] << 6) +
+ buf[3] - 0x3C82080);
+ }
+ return 0xFFFD;
+}
+
+static void
+puglDispatchEvent(PuglView* view, const PuglEvent* event)
+{
+ switch (event->type) {
+ case PUGL_NOTHING:
+ break;
+ case PUGL_CONFIGURE:
+ view->width = event->configure.width;
+ view->height = event->configure.height;
+ puglEnterContext(view);
+ view->eventFunc(view, event);
+ puglLeaveContext(view, false);
+ break;
+ case PUGL_EXPOSE:
+ if (event->expose.count == 0) {
+ puglEnterContext(view);
+ view->eventFunc(view, event);
+ puglLeaveContext(view, true);
+ }
+ break;
+ default:
+ view->eventFunc(view, event);
+ }
+}