Makefile.pandora
author Sam Lantinga <slouken@libsdl.org>
Wed, 18 Oct 2017 08:52:04 -0700
changeset 11630 ad4b5d85edee
parent 11108 9c7a4a9b79d7
child 12130 24142c5073a4
permissions -rw-r--r--
Fixed bug 3821 - Allow SDL_CreateWindow and SDL_CreateRenderer with OpenGL ES 3.0 (GLES3) for Angle (Windows)

Carlos

Angle supports GLES3 but when using these functions (SDL_CreateWindow and SDL_CreateRenderer), defaults again to GLES2.0.

A current workaround (hack) to retrieve a GLES3.0 context with Angle is:

1) set

SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);

after InitSDL AND after calling SDL_CreateWindow (before SDL_CreateRenderer)

2) Comment lines 2032-2044 in SDL_render_gles2.c, funtion GLES2_CreateRenderer

window_flags = SDL_GetWindowFlags(window);
if (!(window_flags & SDL_WINDOW_OPENGL) ||
profile_mask != SDL_GL_CONTEXT_PROFILE_ES || major != RENDERER_CONTEXT_MAJOR || minor != RENDERER_CONTEXT_MINOR) {

changed_window = SDL_TRUE;
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, RENDERER_CONTEXT_MAJOR);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, RENDERER_CONTEXT_MINOR);

if (SDL_RecreateWindow(window, window_flags | SDL_WINDOW_OPENGL) < 0) {
goto error;
}
}

This retrives a GLES3 context as confirmed using glGetString(GL_VERSION). This should be fixed by modifying a few if's.
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# Makefile to build the pandora SDL library
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AR	= arm-none-linux-gnueabi-ar
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RANLIB	= arm-none-linux-gnueabi-ranlib
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CC = arm-none-linux-gnueabi-gcc
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CXX = arm-none-linux-gnueabi-g++
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STRIP = arm-none-linux-gnueabi-strip
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CFLAGS  = -O3 -march=armv7-a -mcpu=cortex-a8 -mtune=cortex-a8 -mfloat-abi=softfp \
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	-mfpu=neon -ftree-vectorize -ffast-math -fomit-frame-pointer -fno-strict-aliasing -fsingle-precision-constant \
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	-I./include -I$(PNDSDK)/usr/include
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TARGET  = libSDL.a
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SOURCES = ./src/*.c ./src/audio/*.c ./src/cpuinfo/*.c ./src/events/*.c \
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	./src/file/*.c ./src/stdlib/*.c ./src/thread/*.c ./src/timer/*.c ./src/video/*.c \
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	./src/joystick/*.c ./src/haptic/*.c ./src/power/*.c ./src/video/dummy/*.c ./src/audio/disk/*.c \
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	./src/audio/dummy/*.c ./src/loadso/dlopen/*.c ./src/audio/dsp/*.c \
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	./src/thread/pthread/SDL_systhread.c ./src/thread/pthread/SDL_syssem.c \
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	./src/thread/pthread/SDL_sysmutex.c ./src/thread/pthread/SDL_syscond.c \
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	./src/joystick/linux/*.c ./src/haptic/linux/*.c ./src/timer/unix/*.c \
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	./src/atomic/*.c ./src/filesystem/unix/*.c \
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	./src/video/pandora/SDL_pandora.o ./src/video/pandora/SDL_pandora_events.o ./src/video/x11/*.c 
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OBJECTS = $(shell echo $(SOURCES) | sed -e 's,\.c,\.o,g')
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CONFIG_H = $(shell cp include/SDL_config_pandora.h include/SDL_config.h)
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all: $(TARGET)
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$(TARGET): $(CONFIG_H) $(OBJECTS)
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	$(AR) crv $@ $^
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	$(RANLIB) $@
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clean:
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	rm -f $(TARGET) $(OBJECTS)