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/*
* Copyright 2012 Google, Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Google Author(s): Behdad Esfahbod, Maysum Panju
*/
#ifndef DEMO_COMMON_H
#define DEMO_COMMON_H
#include <glyphy.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <math.h>
#include <assert.h>
#include <algorithm>
#include <vector>
/* Tailor config for various platforms. */
#ifdef EMSCRIPTEN
/* https://github.com/kripken/emscripten/issues/340 */
# undef HAVE_GLEW
/* WebGL shaders are ES2 */
# define GL_ES_VERSION_2_0 1
#endif
#if defined(__ANDROID__)
# define HAVE_GLES2 1
# define HAVE_GLUT 1
#endif
#ifdef _WIN32
# define HAVE_GL 1
# define HAVE_GLEW 1
#endif
/* Get Glew out of the way. */
#ifdef HAVE_GLEW
# include <GL/glew.h>
#else
# define GLEW_OK 0
static inline int glewInit (void) { return GLEW_OK; }
static inline int glewIsSupported (const char *s)
{ return 0 == strcmp ("GL_VERSION_2_0", s); }
#endif /* HAVE_GLEW */
/* WTF this block?! */
#if defined(HAVE_GLES2)
# include <GLES2/gl2.h>
#elif defined(HAVE_GL)
# ifndef HAVE_GLEW
# define GL_GLEXT_PROTOTYPES 1
# if defined(__APPLE__)
# include <OpenGL/gl.h>
# else
# include <GL/gl.h>
# endif
# endif
# if defined(__APPLE__)
# include <OpenGL/OpenGL.h>
# else
# ifdef HAVE_GLEW
# ifdef _WIN32
# include <GL/wglew.h>
# else
# include <GL/glxew.h>
# endif
# endif
# endif
#endif /* HAVE_GL */
/* Finally, Glut. */
#ifdef HAVE_GLUT
# if defined(__APPLE__)
# include <GLUT/glut.h>
# else
# include <GL/glut.h>
# endif
#endif
/* Logging. */
#ifdef __ANDROID__
# include <android/log.h>
# define LOGI(...) ((void)__android_log_print(ANDROID_LOG_INFO, "glyphy-demo", __VA_ARGS__))
# define LOGW(...) ((void)__android_log_print(ANDROID_LOG_WARN, "glyphy-demo", __VA_ARGS__))
# define LOGE(...) ((void)__android_log_print(ANDROID_LOG_ERROR, "glyphy-demo", __VA_ARGS__))
#else /* !__ANDROID__ */
#if 0
# define LOGI(...) ((void) fprintf (stderr, __VA_ARGS__))
# define LOGW(...) ((void) fprintf (stderr, __VA_ARGS__))
# define LOGE(...) ((void) fprintf (stderr, __VA_ARGS__), abort ())
#else
# define LOGI(...) do { } while(false)
# define LOGW(...) do { } while(false)
# define LOGE(...) do { } while(false)
#endif
#endif
#define STRINGIZE1(Src) #Src
#define STRINGIZE(Src) STRINGIZE1(Src)
#define ARRAY_LEN(Array) (sizeof (Array) / sizeof (*Array))
#define MIN_FONT_SIZE 10
#define TOLERANCE (1./2048)
#define gl(name) \
for (GLint ee_, ii_ = 0; \
ii_ < 1; \
(ii_++, \
(ee_ = glGetError()) && \
(reportGLerror (ee_, #name, __LINE__, __FILE__), 0))) \
gl##name
static inline void
reportGLerror(GLint e, const char *api, int line, const char *file)
{
fflush(stdout);
fprintf(stderr, "\nwglGetCurrentDC=%p wglGetCurrentContext=%p\n", wglGetCurrentDC(), wglGetCurrentContext());
fprintf (stderr, "gl%s failed with error %04X on %s:%d\n", api, e, file, line);
fflush (stderr);
exit (1);
}
static inline void
die (const char *msg)
{
fprintf (stderr, "%s\n", msg);
exit (1);
}
template <typename T>
T clamp (T v, T m, T M)
{
return v < m ? m : v > M ? M : v;
}
#if defined(_MSC_VER)
#define DEMO_FUNC __FUNCSIG__
#else
#define DEMO_FUNC __func__
#endif
struct auto_trace_t
{
auto_trace_t (const char *func_) : func (func_)
{ printf ("Enter: %s\n", func); }
~auto_trace_t (void)
{ printf ("Leave: %s\n", func); }
private:
const char * const func;
};
#if 0
#define TRACE() auto_trace_t trace(DEMO_FUNC)
#else
#define TRACE() do { } while(false)
#endif
#endif /* DEMO_COMMON_H */
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