Merge pull request #832 from reicast/holzhaus/sdl-opengl

Move to SDL2 for OpenGL 3.1 and GLES support

core/khronos/GL3/gl3w.c

@@ -1,6 +1,25 @@
 #include <GL3/gl3w.h>
 
-#ifdef _WIN32
+#if defined(USE_SDL)
+	#include <SDL2/SDL.h>
+	static void open_libgl(void)
+	{
+		SDL_GL_LoadLibrary(NULL);
+	}
+
+	static void close_libgl(void)
+	{
+		SDL_GL_UnloadLibrary();
+	}
+
+	static void *get_proc(const char *proc)
+	{
+		void *res = NULL;
+		res = (void*)SDL_GL_GetProcAddress(proc);
+		return res;
+	}
+
+#elif defined(_WIN32)
 #define WIN32_LEAN_AND_MEAN 1
 #include <windows.h>
 

core/rend/gles/gles.cpp

@@ -355,7 +355,7 @@ int screen_width;
 int screen_height;
 
 #if (HOST_OS != OS_DARWIN) && !defined(TARGET_NACL32)
-#ifdef GLES
+#if defined(GLES) && !defined(USE_SDL)
 	// Create a basic GLES context
 	bool gl_init(void* wind, void* disp)
 	{

core/sdl/sdl.cpp

@@ -3,9 +3,13 @@
 #include "cfg/cfg.h"
 #include "linux-dist/main.h"
 #include "sdl/sdl.h"
-#ifdef GLES
-	#include <EGL/egl.h>
+#ifndef GLES
+#include "khronos/GL3/gl3w.h"
 #endif
+#endif
+
+static SDL_Window* window = NULL;
+static SDL_GLContext glcontext;
 
 #ifdef TARGET_PANDORA
 	#define WINDOW_WIDTH  800
@@ -14,9 +18,7 @@
 #endif
 #define WINDOW_HEIGHT  480
 
-SDL_Surface *screen = NULL;
-
-static SDL_Joystick *JoySDL = 0;
+static SDL_Joystick* JoySDL = 0;
 
 extern bool FrameSkipping;
 extern void dc_term();
@@ -80,11 +82,11 @@ void input_sdl_init()
 
 		AxisCount = SDL_JoystickNumAxes(JoySDL);
 		ButtonCount = SDL_JoystickNumButtons(JoySDL);
-		Name = SDL_JoystickName(0);
-		
+		Name = SDL_JoystickName(JoySDL);
+
 		printf("SDK: Found '%s' joystick with %d axes and %d buttons\n", Name, AxisCount, ButtonCount);
 
-		if (strcmp(Name,"Microsoft X-Box 360 pad")==0)
+		if (Name != NULL && strcmp(Name,"Microsoft X-Box 360 pad")==0)
 		{
 			sdl_map_btn  = sdl_map_btn_xbox360;
 			sdl_map_axis = sdl_map_axis_xbox360;
@@ -113,12 +115,7 @@ void input_sdl_init()
 		}
 	#endif
 	
-	SDL_ShowCursor(0);
-
-	if (SDL_WM_GrabInput( SDL_GRAB_ON ) != SDL_GRAB_ON)
-	{
-		printf("SDK: Error while grabbing mouse\n");
-	}
+	SDL_SetRelativeMouseMode(SDL_TRUE);
 }
 
 void input_sdl_handle(u32 port)
@@ -397,12 +394,13 @@ void sdl_window_set_text(const char* text)
 	#ifdef TARGET_PANDORA
 		strncpy(OSD_Counters, text, 256);
 	#else
-		SDL_WM_SetCaption(text, NULL);    // *TODO*  Set Icon also...
+		if(window)
+		{
+			SDL_SetWindowTitle(window, text);    // *TODO*  Set Icon also...
+		}
 	#endif
 }
 
-int ndcid = 0;
-
 void sdl_window_create()
 {
 	if (SDL_WasInit(SDL_INIT_VIDEO) == 0)
@@ -415,17 +413,76 @@ void sdl_window_create()
 
 	int window_width  = cfgLoadInt("x11","width", WINDOW_WIDTH);
 	int window_height = cfgLoadInt("x11","height", WINDOW_HEIGHT);
+
+	int flags = SDL_WINDOW_OPENGL;
 	#ifdef TARGET_PANDORA
-		int flags = SDL_FULLSCREEN;
+		flags |= SDL_FULLSCREEN;
 	#else
-		int flags = SDL_SWSURFACE;
+		flags |= SDL_SWSURFACE;
 	#endif
-	screen = SDL_SetVideoMode(window_width, window_height, 0, flags);
-	if (!screen)
+
+	#ifdef GLES
+		SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES);
+		SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
+		SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
+	#else
+		SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
+		SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
+		SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 1);
+	#endif
+
+	SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
+	SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
+	SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
+	SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 8);
+	SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
+	SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 8);
+	SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
+
+	window = SDL_CreateWindow("Reicast Emulator", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,	window_width, window_height, flags);
+	if (!window)
 	{
-		die("error creating SDL screen");
+		die("error creating SDL window");
 	}
-	x11_disp = EGL_DEFAULT_DISPLAY;
-	printf("Created SDL Windows (%ix%i) successfully\n", window_width, window_height);
+
+	glcontext = SDL_GL_CreateContext(window);
+	if (!glcontext)
+	{
+		die("Error creating SDL GL context");
+	}
+	SDL_GL_MakeCurrent(window, NULL);
+
+	printf("Created SDL Window (%ix%i) and GL Context successfully\n", window_width, window_height);
+}
+
+extern int screen_width, screen_height;
+
+bool gl_init(void* wind, void* disp)
+{
+	SDL_GL_MakeCurrent(window, glcontext);
+	#ifdef GLES
+		return true;
+	#else
+		return gl3wInit() != -1 && gl3wIsSupported(3, 1);
+	#endif
+}
+
+void gl_swap()
+{
+	SDL_GL_SwapWindow(window);
+
+	/* Check if drawable has been resized */
+	int new_width, new_height;
+	SDL_GL_GetDrawableSize(window, &new_width, &new_height);
+
+	if (new_width != screen_width || new_height != screen_height)
+	{
+		screen_width = new_width;
+		screen_height = new_height;
+	}
+}
+
+void gl_term()
+{
+	SDL_GL_DeleteContext(glcontext);
 }
-#endif

core/sdl/sdl.h

@@ -1,6 +1,6 @@
 #pragma once
-#include <SDL/SDL.h>
-extern void* sdl_glc;
+#include <SDL2/SDL.h>
+
 extern void input_sdl_init();
 extern void input_sdl_handle(u32 port);
 extern void sdl_window_create();

shell/linux/Makefile

@@ -213,8 +213,8 @@ ifndef NOT_ARM
 endif
 
 ifdef USE_SDL
-    CXXFLAGS += `sdl-config --cflags` -D USE_SDL
-    LIBS += `sdl-config --libs`
+    CXXFLAGS += `sdl2-config --cflags` -D USE_SDL
+    LIBS += `sdl2-config --libs`
 endif
 
 ifdef PGO_MAKE