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RetroArch/gfx/sdlwrap.c
Themaister c05a5c9fdd Only init Video if it isn't already.
2011-11-23 03:26:56 +01:00

352 lines
8.4 KiB
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/* SSNES - A Super Nintendo Entertainment System (SNES) Emulator frontend for libsnes.
* Copyright (C) 2010-2011 - Hans-Kristian Arntzen
*
* Some code herein may be based on code found in BSNES.
*
* SSNES is free software: you can redistribute it and/or modify it under the terms
* of the GNU General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* SSNES is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with SSNES.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include "sdlwrap.h"
#include "SDL_syswm.h"
#include "general.h"
#include <assert.h>
#ifdef __APPLE__
#include <OpenGL/OpenGL.h>
#include <OpenGL/gl.h>
#endif
// SDL 1.2 is portable, sure, but you still need some platform specific workarounds ;)
// Hopefully SDL 1.3 will solve this more cleanly :D
// Welcome to #ifdef HELL! :D
//
#if SDL_MODERN
static SDL_Window* g_window;
static SDL_GLContext g_ctx;
#endif
static bool g_fullscreen;
static unsigned g_interval;
void sdlwrap_set_swap_interval(unsigned interval, bool inited)
{
g_interval = interval;
#if SDL_MODERN
if (g_window)
SDL_GL_SetSwapInterval(g_interval);
#else
if (inited)
{
#if defined(_WIN32)
static BOOL (APIENTRY *wgl_swap_interval)(int) = NULL;
if (!wgl_swap_interval)
{
SDL_SYM_WRAP(wgl_swap_interval, "wglSwapIntervalEXT");
}
if (wgl_swap_interval) wgl_swap_interval(g_interval);
#elif defined(__APPLE__) && defined(HAVE_OPENGL)
GLint val = g_interval;
CGLSetParameter(CGLGetCurrentContext(), kCGLCPSwapInterval, &val);
#else
static int (*glx_swap_interval)(int) = NULL;
if (!glx_swap_interval)
{
SDL_SYM_WRAP(glx_swap_interval, "glXSwapIntervalSGI");
}
if (!glx_swap_interval)
{
SDL_SYM_WRAP(glx_swap_interval, "glXSwapIntervalMESA");
}
if (glx_swap_interval)
glx_swap_interval(g_interval);
else
SSNES_WARN("Could not find GLX VSync call. :(\n");
#endif
}
#endif
}
bool sdlwrap_init(void)
{
#if SDL_MODERN
return SDL_VideoInit(NULL) == 0;
#else
if (SDL_WasInit(SDL_INIT_VIDEO))
return true;
return SDL_Init(SDL_INIT_VIDEO) == 0;
#endif
}
#if SDL_MODERN
void sdlwrap_destroy(void)
{
if (g_ctx)
SDL_GL_DeleteContext(g_ctx);
if (g_window)
SDL_DestroyWindow(g_window);
g_ctx = NULL;
g_window = NULL;
SDL_VideoQuit();
}
#else
void sdlwrap_destroy(void)
{
SDL_QuitSubSystem(SDL_INIT_VIDEO);
}
#endif
bool sdlwrap_set_video_mode(
unsigned width, unsigned height,
unsigned bits, bool fullscreen)
{
#if SDL_MODERN
if (g_window)
return true;
#endif
#if SDL_MODERN
static const int resizable = SDL_WINDOW_RESIZABLE;
#else
#ifndef __APPLE__ // Resizing on OSX is broken in 1.2 it seems :)
static const int resizable = SDL_RESIZABLE;
#else
static const int resizable = 0;
#endif
#endif
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
#if !SDL_MODERN
SDL_GL_SetAttribute(SDL_GL_SWAP_CONTROL, g_interval);
#endif
#if SDL_MODERN
if (bits == 15)
{
SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5);
SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 5);
SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5);
}
g_window = SDL_CreateWindow("SSNES", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
width, height, SDL_WINDOW_OPENGL | SDL_WINDOW_SHOWN | (fullscreen ? SDL_WINDOW_FULLSCREEN : resizable));
if (!g_window)
return false;
g_ctx = SDL_GL_CreateContext(g_window);
#else
if (!SDL_SetVideoMode(width, height, bits,
SDL_OPENGL | (fullscreen ? SDL_FULLSCREEN : resizable)))
return false;
#endif
int attr = 0;
#if SDL_MODERN
SDL_GL_SetSwapInterval(g_interval);
#else
SDL_GL_GetAttribute(SDL_GL_SWAP_CONTROL, &attr);
if (attr <= 0 && g_interval)
{
SSNES_WARN("SDL failed to setup VSync, attempting to recover using native calls!\n");
sdlwrap_set_swap_interval(g_interval, true);
}
#endif
g_fullscreen = fullscreen;
attr = 0;
SDL_GL_GetAttribute(SDL_GL_DOUBLEBUFFER, &attr);
if (attr <= 0)
SSNES_WARN("GL double buffer has not been enabled!\n");
return true;
}
// SDL 1.2 has an awkward model where you need to "confirm" window resizing.
// SDL 1.3 luckily removes this quirk.
void sdlwrap_set_resize(unsigned width, unsigned height)
{
#if SDL_MODERN
(void)width;
(void)height;
#else
#ifndef __APPLE__ // Resizing on OSX is broken in 1.2 it seems :)
static const int resizable = SDL_RESIZABLE;
#else
static const int resizable = 0;
#endif
SDL_SetVideoMode(width, height, 0, SDL_OPENGL | (g_fullscreen ? SDL_FULLSCREEN : resizable));
#endif
}
void sdlwrap_wm_set_caption(const char *str)
{
#if SDL_MODERN
SDL_SetWindowTitle(g_window, str);
#else
SDL_WM_SetCaption(str, NULL);
#endif
}
void sdlwrap_swap_buffers(void)
{
#if SDL_MODERN
SDL_GL_SwapWindow(g_window);
#else
SDL_GL_SwapBuffers();
#endif
}
bool sdlwrap_key_pressed(int key)
{
int num_keys;
#if SDL_MODERN
Uint8 *keymap = SDL_GetKeyboardState(&num_keys);
key = SDL_GetScancodeFromKey(key);
if (key >= num_keys)
return false;
return keymap[key];
#else
Uint8 *keymap = SDL_GetKeyState(&num_keys);
if (key >= num_keys)
return false;
return keymap[key];
#endif
}
// 1.2 specific workaround for tiling WMs. In 1.3 we call GetSize directly, so we don't need to rely on
// proper event handling (I hope).
#if !defined(__APPLE__) && !defined(_WIN32) && !SDL_MODERN
static void sdlwrap_get_window_size(unsigned *width, unsigned *height)
{
SDL_SysWMinfo info;
SDL_VERSION(&info.version);
SDL_GetWMInfo(&info);
XWindowAttributes target;
info.info.x11.lock_func();
XGetWindowAttributes(info.info.x11.display, info.info.x11.window,
&target);
info.info.x11.unlock_func();
*width = target.width;
*height = target.height;
}
#endif
void sdlwrap_check_window(bool *quit,
bool *resize, unsigned *width, unsigned *height, unsigned frame_count)
{
*quit = false;
*resize = false;
SDL_Event event;
#if SDL_MODERN
while (SDL_PollEvent(&event))
{
switch (event.type)
{
case SDL_QUIT:
*quit = true;
return;
case SDL_WINDOWEVENT:
switch (event.window.event)
{
case SDL_WINDOWEVENT_CLOSE:
*quit = true;
return;
case SDL_WINDOWEVENT_RESIZED:
*resize = true;
*width = event.window.data1;
*height = event.window.data2;
break;
}
break;
}
}
if (!*resize)
{
int w, h;
SDL_GetWindowSize(g_window, &w, &h);
if (*width != (unsigned)w || *height != (unsigned)h)
{
*resize = true;
*width = w;
*height = h;
}
}
#else
while (SDL_PollEvent(&event))
{
switch (event.type)
{
case SDL_QUIT:
*quit = true;
break;
case SDL_VIDEORESIZE:
*resize = true;
*width = event.resize.w;
*height = event.resize.h;
break;
}
}
#if !defined(__APPLE__) && !defined(_WIN32)
// Hack to workaround limitations in tiling WMs ...
if (!*resize && !g_fullscreen)
{
unsigned new_width, new_height;
sdlwrap_get_window_size(&new_width, &new_height);
if ((new_width != *width || new_height != *height) || (frame_count == 10)) // Ugly hack :D
{
*resize = true;
*width = new_width;
*height = new_height;
SSNES_LOG("GL: Verified window size: %u x %u\n", *width, *height);
}
}
#endif
#endif
}
bool sdlwrap_get_wm_info(SDL_SysWMinfo *info)
{
#if SDL_MODERN
if (g_window)
return SDL_GetWindowWMInfo(g_window, info);
else
return SDL_GetWMInfo(info) == 1;
#else
return SDL_GetWMInfo(info) == 1;
#endif
}
bool sdlwrap_window_has_focus(void)
{
#if SDL_MODERN
Uint32 flags = SDL_GetWindowFlags(g_window);
flags &= SDL_WINDOW_INPUT_FOCUS;
return flags == SDL_WINDOW_INPUT_FOCUS;
#else
return (SDL_GetAppState() & (SDL_APPINPUTFOCUS | SDL_APPACTIVE)) == (SDL_APPINPUTFOCUS | SDL_APPACTIVE);
#endif
}
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