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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"
#include "pugl/event.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)
{
if (event->type == PUGL_NOTHING) {
return;
} else if (event->type == PUGL_EXPOSE && event->expose.count > 0) {
return;
} else if (view->eventFunc) {
const bool is_draw = (event->type == PUGL_CONFIGURE ||
event->type == PUGL_EXPOSE);
if (is_draw) {
puglEnterContext(view);
}
view->eventFunc(view, event);
if (is_draw) {
puglLeaveContext(view, event->type == PUGL_EXPOSE);
}
}
}
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