Add SDL2 platform (#166)

* Add SDL2 platform * add desktopGL support to the SDL2 platform, and add SDL2 context shutdown calls
XProger · Feb 20, 2019 · a8ec6cc · a8ec6cc
1 parent 1833cb1
commit a8ec6cc
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Showing 5 changed files with 594 additions and 3 deletions.
diff --git a/src/core.h b/src/core.h
@@ -27,6 +27,12 @@
     //#define _GAPI_VULKAN
 
     extern void osToggleVR(bool enable);
+#elif __SDL2__
+    #define _GAPI_GL   1
+#ifdef SDL2GLES
+    #define _GAPI_GLES 1
+    #define DYNGEOM_NO_VBO
+#endif
 #elif __RPI__
     #define _OS_RPI    1
     #define _GAPI_GL   1

diff --git a/src/gapi_gl.h b/src/gapi_gl.h
@@ -16,6 +16,51 @@
     #include <GLES3/gl3.h>
     #include <GLES3/gl3ext.h>
     #include <GLES2/gl2ext.h>
+
+#elif defined(__SDL2__) 
+    #include <SDL2/SDL.h>
+#if !defined(_GAPI_GLES)
+    #include <SDL2/SDL_opengl.h>
+#else
+    #include <SDL2/SDL_opengles2.h>
+
+    #define GL_CLAMP_TO_BORDER          0x812D
+    #define GL_TEXTURE_BORDER_COLOR     0x1004
+
+    #define GL_TEXTURE_COMPARE_MODE     0x884C
+    #define GL_TEXTURE_COMPARE_FUNC     0x884D
+    #define GL_COMPARE_REF_TO_TEXTURE   0x884E
+
+    #undef  GL_RG
+    #undef  GL_RG32F
+    #undef  GL_RG16F
+    #undef  GL_RGBA32F
+    #undef  GL_RGBA16F
+    #undef  GL_HALF_FLOAT
+
+    #define GL_RG           GL_RGBA
+    #define GL_RGBA32F      GL_RGBA
+    #define GL_RGBA16F      GL_RGBA
+    #define GL_RG32F        GL_RGBA
+    #define GL_RG16F        GL_RGBA
+    #define GL_HALF_FLOAT   GL_HALF_FLOAT_OES
+
+    #define GL_TEXTURE_3D           0
+    #define GL_TEXTURE_WRAP_R       0
+    #define GL_DEPTH_STENCIL        GL_DEPTH_STENCIL_OES
+    #define GL_UNSIGNED_INT_24_8    GL_UNSIGNED_INT_24_8_OES
+
+    #define glTexImage3D(...) 0
+
+    #define glGenVertexArrays(...)
+    #define glDeleteVertexArrays(...)
+    #define glBindVertexArray(...)
+
+    #define GL_PROGRAM_BINARY_LENGTH     GL_PROGRAM_BINARY_LENGTH_OES
+    #define glGetProgramBinary(...)
+    #define glProgramBinary(...)
+#endif
+
 #elif defined(_OS_RPI) || defined(_OS_CLOVER)
     #include <GLES2/gl2.h>
     #include <GLES2/gl2ext.h>
@@ -245,11 +290,10 @@
     PFNGLPROGRAMBINARYPROC              glProgramBinary;
 #endif
 
-#if defined(_GAPI_GLES) && !defined(_OS_RPI) && !defined(_OS_CLOVER) && !defined(_OS_IOS) && !defined(_OS_ANDROID)
+#if defined(_GAPI_GLES) && !defined(_OS_RPI) && !defined(_OS_CLOVER) && !defined(_OS_IOS) && !defined(_OS_ANDROID) && !defined(__SDL2__)
     PFNGLDISCARDFRAMEBUFFEREXTPROC      glDiscardFramebufferEXT;
 #endif
 
-
 #ifdef PROFILE
    //#define USE_CV_MARKERS
 
@@ -1074,7 +1118,11 @@ namespace GAPI {
         #else
             #ifdef _GAPI_GLES
                 int GLES_VERSION = 1;
+                #if defined(__SDL2__)
+                SDL_GL_GetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, &GLES_VERSION);
+                #else
                 glGetIntegerv(GL_MAJOR_VERSION, &GLES_VERSION);
+                #endif 
                 GLES3 = GLES_VERSION > 2; 
             #endif
         #endif
@@ -1272,7 +1320,9 @@ namespace GAPI {
                 #ifdef _OS_ANDROID
                     glInvalidateFramebuffer(GL_FRAMEBUFFER, count, discard);
                 #else
-                    glDiscardFramebufferEXT(GL_FRAMEBUFFER, count, discard);
+                    #if !defined(__SDL2__)
+                        glDiscardFramebufferEXT(GL_FRAMEBUFFER, count, discard);
+                    #endif
                 #endif
             }
         }

diff --git a/src/platform/sdl2/Makefile b/src/platform/sdl2/Makefile
@@ -0,0 +1,31 @@
+SRCS=main.cpp ../../libs/stb_vorbis/stb_vorbis.c ../../libs/minimp3/minimp3.cpp ../../libs/tinf/tinflate.c
+CC=g++
+OBJS=OpenLara.o
+BIN=OpenLara
+
+CFLAGS+=-D__SDL2__
+LDFLAGS+=-lGLESv2 -lEGL -lSDL2 -lpthread -lrt -lm
+
+INCLUDES+=-I./ 
+
+openlara : $(OBJS)
+	$(CC) $(CFLAGS) $(LDFLAGS) $^ -o $@
+
+%.o: %.c
+	@rm -f $@ 
+	$(CC) $(CFLAGS) $(INCLUDES) -g -c $< -o $@ -Wno-deprecated-declarations
+
+%.o: %.cpp
+	@rm -f $@ 
+	$(CXX) $(CFLAGS) $(INCLUDES) -g -c $< -o $@ -Wno-deprecated-declarations
+
+%.bin: $(OBJS)
+	$(CC) -o $@ -Wl,--whole-archive $(OBJS) $(LDFLAGS) -Wl,--no-whole-archive -rdynamic
+
+%.a: $(OBJS)
+	$(AR) r $@ $^
+
+clean:
+	for i in $(OBJS); do (if test -e "$$i"; then ( rm $$i ); fi ); done
+	@rm -f $(BIN) $(LIB)
+
diff --git a/src/platform/sdl2/build.sh b/src/platform/sdl2/build.sh
@@ -0,0 +1,4 @@
+set -e
+g++ -DSDL2_GLES -std=c++11 `sdl2-config --cflags` -O3 -fno-exceptions -fno-rtti -ffunction-sections -fdata-sections -Wl,--gc-sections -DNDEBUG -D__SDL2__ main.cpp ../../libs/stb_vorbis/stb_vorbis.c ../../libs/minimp3/minimp3.cpp ../../libs/tinf/tinflate.c -I../../ -o OpenLara `sdl2-config --libs` -lGLESv2 -lEGL -lm -lrt -lpthread -lasound -ludev
+#g++ -std=c++11 `sdl2-config --cflags` -O3 -fno-exceptions -fno-rtti -ffunction-sections -fdata-sections -Wl,--gc-sections -DNDEBUG -D__SDL2__ main.cpp ../../libs/stb_vorbis/stb_vorbis.c ../../libs/minimp3/minimp3.cpp ../../libs/tinf/tinflate.c -I../../ -o OpenLara `sdl2-config --libs` -lGL -lm -lrt -lpthread -lasound -ludev
+#strip ../../../bin/OpenLara --strip-all --remove-section=.comment --remove-section=.note