From: Javier S. Pedro Date: Tue, 2 Mar 2010 16:04:19 +0000 (+0100) Subject: SDLGLES initial import X-Git-Tag: sdlgles_1_0_0~8 X-Git-Url: https://vcs.maemo.org/git/?p=sdlhildon;a=commitdiff_plain;h=c5cfae52225227919881e24c7b3547a6a58af1ea SDLGLES initial import --- diff --git a/sdlgles/COPYING b/sdlgles/COPYING new file mode 100644 index 0000000..94a9ed0 --- /dev/null +++ b/sdlgles/COPYING @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/sdlgles/COPYING.LESSER b/sdlgles/COPYING.LESSER new file mode 100644 index 0000000..cca7fc2 --- /dev/null +++ b/sdlgles/COPYING.LESSER @@ -0,0 +1,165 @@ + GNU LESSER GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + + This version of the GNU Lesser General Public License incorporates +the terms and conditions of version 3 of the GNU General Public +License, supplemented by the additional permissions listed below. + + 0. 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The particular version of the Library +with which the Combined Work was made is also called the "Linked +Version". + + The "Minimal Corresponding Source" for a Combined Work means the +Corresponding Source for the Combined Work, excluding any source code +for portions of the Combined Work that, considered in isolation, are +based on the Application, and not on the Linked Version. + + The "Corresponding Application Code" for a Combined Work means the +object code and/or source code for the Application, including any data +and utility programs needed for reproducing the Combined Work from the +Application, but excluding the System Libraries of the Combined Work. + + 1. Exception to Section 3 of the GNU GPL. + + You may convey a covered work under sections 3 and 4 of this License +without being bound by section 3 of the GNU GPL. + + 2. Conveying Modified Versions. + + If you modify a copy of the Library, and, in your modifications, a +facility refers to a function or data to be supplied by an Application +that uses the facility (other than as an argument passed when the +facility is invoked), then you may convey a copy of the modified +version: + + a) under this License, provided that you make a good faith effort to + ensure that, in the event an Application does not supply the + function or data, the facility still operates, and performs + whatever part of its purpose remains meaningful, or + + b) under the GNU GPL, with none of the additional permissions of + this License applicable to that copy. + + 3. Object Code Incorporating Material from Library Header Files. + + The object code form of an Application may incorporate material from +a header file that is part of the Library. You may convey such object +code under terms of your choice, provided that, if the incorporated +material is not limited to numerical parameters, data structure +layouts and accessors, or small macros, inline functions and templates +(ten or fewer lines in length), you do both of the following: + + a) Give prominent notice with each copy of the object code that the + Library is used in it and that the Library and its use are + covered by this License. + + b) Accompany the object code with a copy of the GNU GPL and this license + document. + + 4. Combined Works. + + You may convey a Combined Work under terms of your choice that, +taken together, effectively do not restrict modification of the +portions of the Library contained in the Combined Work and reverse +engineering for debugging such modifications, if you also do each of +the following: + + a) Give prominent notice with each copy of the Combined Work that + the Library is used in it and that the Library and its use are + covered by this License. + + b) Accompany the Combined Work with a copy of the GNU GPL and this license + document. + + c) For a Combined Work that displays copyright notices during + execution, include the copyright notice for the Library among + these notices, as well as a reference directing the user to the + copies of the GNU GPL and this license document. + + d) Do one of the following: + + 0) Convey the Minimal Corresponding Source under the terms of this + License, and the Corresponding Application Code in a form + suitable for, and under terms that permit, the user to + recombine or relink the Application with a modified version of + the Linked Version to produce a modified Combined Work, in the + manner specified by section 6 of the GNU GPL for conveying + Corresponding Source. + + 1) Use a suitable shared library mechanism for linking with the + Library. A suitable mechanism is one that (a) uses at run time + a copy of the Library already present on the user's computer + system, and (b) will operate properly with a modified version + of the Library that is interface-compatible with the Linked + Version. + + e) Provide Installation Information, but only if you would otherwise + be required to provide such information under section 6 of the + GNU GPL, and only to the extent that such information is + necessary to install and execute a modified version of the + Combined Work produced by recombining or relinking the + Application with a modified version of the Linked Version. (If + you use option 4d0, the Installation Information must accompany + the Minimal Corresponding Source and Corresponding Application + Code. If you use option 4d1, you must provide the Installation + Information in the manner specified by section 6 of the GNU GPL + for conveying Corresponding Source.) + + 5. Combined Libraries. + + You may place library facilities that are a work based on the +Library side by side in a single library together with other library +facilities that are not Applications and are not covered by this +License, and convey such a combined library under terms of your +choice, if you do both of the following: + + a) Accompany the combined library with a copy of the same work based + on the Library, uncombined with any other library facilities, + conveyed under the terms of this License. + + b) Give prominent notice with the combined library that part of it + is a work based on the Library, and explaining where to find the + accompanying uncombined form of the same work. + + 6. Revised Versions of the GNU Lesser General Public License. + + The Free Software Foundation may publish revised and/or new versions +of the GNU Lesser General Public License from time to time. Such new +versions will be similar in spirit to the present version, but may +differ in detail to address new problems or concerns. + + Each version is given a distinguishing version number. If the +Library as you received it specifies that a certain numbered version +of the GNU Lesser General Public License "or any later version" +applies to it, you have the option of following the terms and +conditions either of that published version or of any later version +published by the Free Software Foundation. If the Library as you +received it does not specify a version number of the GNU Lesser +General Public License, you may choose any version of the GNU Lesser +General Public License ever published by the Free Software Foundation. + + If the Library as you received it specifies that a proxy can decide +whether future versions of the GNU Lesser General Public License shall +apply, that proxy's public statement of acceptance of any version is +permanent authorization for you to choose that version for the +Library. diff --git a/sdlgles/Makefile b/sdlgles/Makefile new file mode 100644 index 0000000..8a8688b --- /dev/null +++ b/sdlgles/Makefile @@ -0,0 +1,11 @@ +all: + make -C src all + +clean: + make -C src clean + +install: + make -C src install + +uninstall: + make -C src uninstall diff --git a/sdlgles/debian/README b/sdlgles/debian/README new file mode 100644 index 0000000..f792888 --- /dev/null +++ b/sdlgles/debian/README @@ -0,0 +1,6 @@ +The Debian Package sdlgles +---------------------------- + +No comments. + + -- Javier S. Pedro Wed, 20 Jan 2010 02:14:30 +0100 diff --git a/sdlgles/debian/changelog b/sdlgles/debian/changelog new file mode 100644 index 0000000..ae5e170 --- /dev/null +++ b/sdlgles/debian/changelog @@ -0,0 +1,5 @@ +sdlgles (1.0.0) unstable; urgency=low + + * Initial Release. + + -- Javier S. Pedro Tue, 2 Feb 2010 00:03:22 +0100 diff --git a/sdlgles/debian/compat b/sdlgles/debian/compat new file mode 100644 index 0000000..7ed6ff8 --- /dev/null +++ b/sdlgles/debian/compat @@ -0,0 +1 @@ +5 diff --git a/sdlgles/debian/control b/sdlgles/debian/control new file mode 100644 index 0000000..be72b25 --- /dev/null +++ b/sdlgles/debian/control @@ -0,0 +1,23 @@ +Source: sdlgles +Priority: extra +Maintainer: Javier S. Pedro +Build-Depends: debhelper (>= 5), libxext-dev, libsdl1.2-dev +Standards-Version: 3.7.2 +Section: libs + +Package: libsdl-gles1.2-1 +Section: libs +Architecture: any +Depends: ${shlibs:Depends}, ${misc:Depends} +Description: OpenGL|ES library for Simple DirectMedia Layer 1.2 + This is a simple library that allows you to use OpenGL|ES (1.1 or 2.0) calls + in your SDL applications, hiding the EGL surface creation from you. + +Package: libsdl-gles1.2-dev +Section: libdevel +Architecture: any +Depends: libsdl-gles1.2-1 (= ${Source-Version}) +Description: development files for OpenGL|ES library for SDL 1.2 + This is a simple library that allows you to use OpenGL|ES (1.1 or 2.0) calls + in your SDL applications, hiding the EGL surface creation from you. + diff --git a/sdlgles/debian/copyright b/sdlgles/debian/copyright new file mode 100644 index 0000000..fa512dd --- /dev/null +++ b/sdlgles/debian/copyright @@ -0,0 +1,26 @@ +This is sdlgles, written and maintained by Javier S. Pedro +on Wed, 20 Jan 2010 02:14:30 +0100. + +The original source can always be found at: + http://git.maemo.org/git/sdlhildon/?p=sdlhildon;a=summary + +Copyright Holder: Javier S. Pedro + +License: + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU Lesser Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program 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 Lesser Public License + along with this package; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + +On Debian systems, the complete text of the GNU General +Public License can be found in `/usr/share/common-licenses/LGPL'. diff --git a/sdlgles/debian/docs b/sdlgles/debian/docs new file mode 100644 index 0000000..e69de29 diff --git a/sdlgles/debian/libsdl-gles1.2-1.install b/sdlgles/debian/libsdl-gles1.2-1.install new file mode 100644 index 0000000..d0dbfd1 --- /dev/null +++ b/sdlgles/debian/libsdl-gles1.2-1.install @@ -0,0 +1 @@ +usr/lib/lib*.so.* diff --git a/sdlgles/debian/libsdl-gles1.2-dev.install b/sdlgles/debian/libsdl-gles1.2-dev.install new file mode 100644 index 0000000..b254c79 --- /dev/null +++ b/sdlgles/debian/libsdl-gles1.2-dev.install @@ -0,0 +1,5 @@ +usr/include/* +usr/lib/lib*.a +usr/lib/lib*.so +#usr/lib/pkgconfig/* +usr/lib/*.la diff --git a/sdlgles/debian/optify b/sdlgles/debian/optify new file mode 100644 index 0000000..865faf1 --- /dev/null +++ b/sdlgles/debian/optify @@ -0,0 +1 @@ +auto diff --git a/sdlgles/debian/rules b/sdlgles/debian/rules new file mode 100755 index 0000000..1fec5ef --- /dev/null +++ b/sdlgles/debian/rules @@ -0,0 +1,77 @@ +#!/usr/bin/make -f +# -*- makefile -*- +# Sample debian/rules that uses debhelper. +# This file was originally written by Joey Hess and Craig Small. +# As a special exception, when this file is copied by dh-make into a +# dh-make output file, you may use that output file without restriction. +# This special exception was added by Craig Small in version 0.37 of dh-make. + +# Uncomment this to turn on verbose mode. +#export DH_VERBOSE=1 + +CFLAGS = -Wall -g + +ifneq (,$(findstring noopt,$(DEB_BUILD_OPTIONS))) + CFLAGS += -O0 +else + CFLAGS += -O2 +endif + +configure: configure-stamp +configure-stamp: + dh_testdir + touch configure-stamp + + +build: build-stamp +build-stamp: configure-stamp + dh_testdir + + $(MAKE) CFLAGS="$(CFLAGS)" + + touch $@ + +clean: + dh_testdir + dh_testroot + rm -f build-stamp configure-stamp + + -$(MAKE) clean + + dh_clean + +install: build + dh_testdir + dh_testroot + dh_clean -k + dh_installdirs + + $(MAKE) DESTDIR=$(CURDIR)/debian/tmp install + + +# Build architecture-independent files here. +binary-indep: build install +# We have nothing to do by default. + +# Build architecture-dependent files here. +binary-arch: build install + dh_testdir + dh_testroot + dh_installchangelogs + dh_installdocs + dh_installexamples + dh_install --sourcedir=debian/tmp + dh_installman + dh_link + dh_strip + dh_compress + dh_fixperms + dh_makeshlibs -V "libsdl-gles1.2-1 (>= 1.0.0)" + dh_installdeb + dh_shlibdeps + dh_gencontrol + dh_md5sums + dh_builddeb + +binary: binary-indep binary-arch +.PHONY: build clean binary-indep binary-arch binary install configure diff --git a/sdlgles/src/Makefile b/sdlgles/src/Makefile new file mode 100644 index 0000000..d8ad8b7 --- /dev/null +++ b/sdlgles/src/Makefile @@ -0,0 +1,37 @@ +PREFIX:=$(shell sdl-config --prefix) +CFLAGS:=-g -O0 -Wall -Wextra + +CC:=gcc + +RELEASE:=1.2 +VERSION:=0:1:0 + +SDL_GLES_TARGET:=libSDL_gles.la + +SDL_GLES_LDLIBS:=$(shell sdl-config --libs) -lEGL +SDL_GLES_CFLAGS:=$(shell sdl-config --cflags) +SDL_GLES_LDFLAGS:=-release $(RELEASE) -version-info $(VERSION) -rpath $(PREFIX)/lib + +all: $(SDL_GLES_TARGET) + +$(SDL_GLES_TARGET): SDL_gles.lo + $(LIBTOOL) --mode=link $(CC) $(LDFLAGS) $(SDL_GLES_LDFLAGS) $(LDLIBS) $(SDL_GLES_LDLIBS) -o $@ $^ + +SDL_gles.lo: SDL_gles.c + $(LIBTOOL) --mode=compile $(CC) $(CFLAGS) $(SDL_GLES_CFLAGS) -c $^ + +clean: + $(LIBTOOL) --mode=clean rm -f *.o *.lo $(SDL_GLES_TARGET) + +install: $(SDL_GLES_TARGET) + install -d $(DESTDIR)$(PREFIX)/include/SDL $(DESTDIR)$(PREFIX)/lib + install SDL_gles.h $(DESTDIR)$(PREFIX)/include/SDL/ + $(LIBTOOL) --mode=install install -c $(SDL_GLES_TARGET) $(DESTDIR)$(PREFIX)/lib/ +ifeq ($(DESTDIR),) + $(LIBTOOL) --mode=finish $(PREFIX)/lib +endif + +uninstall: + -$(LIBTOOL) --mode=uninstall rm $(DESTDIR)$(PREFIX)/lib/$(SDL_GLES_TARGET) + -rm $(DESTDIR)$(PREFIX)/include/SDL/SDL_gles.h + diff --git a/sdlgles/src/SDL_gles.c b/sdlgles/src/SDL_gles.c new file mode 100644 index 0000000..186eb15 --- /dev/null +++ b/sdlgles/src/SDL_gles.c @@ -0,0 +1,311 @@ +/* This file is part of SDL_gles - SDL addon for OpenGL|ES + * Copyright (C) 2010 Javier S. Pedro + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 3 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA or see . + */ + +#include +#include +#include +#include +#include + +#include + +#include +#include + +#include "SDL_gles.h" + +typedef struct SDL_GLES_ContextPriv +{ + SDL_GLES_Context p; + + EGLConfig egl_config; + EGLContext egl_context; +} SDL_GLES_ContextPriv; + +static const char * default_libgl[] = { + [SDL_GLES_VERSION_1_1] = "/usr/lib/libGLES_CM.so", + [SDL_GLES_VERSION_2_0] = "/usr/lib/libGLESv2.so" +}; + +static SDL_GLES_Version gl_version = SDL_GLES_VERSION_NONE; +static void* gl_handle = NULL; +static EGLint egl_major, egl_minor; + +static Display *display = NULL; +static EGLDisplay *egl_display = EGL_NO_DISPLAY; +static EGLSurface egl_surface = EGL_NO_SURFACE; +static EGLint attrib_list[] = { + EGL_BUFFER_SIZE, 0, + EGL_RED_SIZE, 0, + EGL_GREEN_SIZE, 0, + EGL_BLUE_SIZE, 0, + EGL_ALPHA_SIZE, 0, + EGL_CONFIG_CAVEAT, EGL_DONT_CARE, + EGL_CONFIG_ID, EGL_DONT_CARE, + EGL_DEPTH_SIZE, 0, + EGL_LEVEL, 0, + EGL_NATIVE_RENDERABLE, EGL_DONT_CARE, + EGL_NATIVE_VISUAL_TYPE, EGL_DONT_CARE, + EGL_SAMPLE_BUFFERS, 0, + EGL_SAMPLES, 0, + EGL_STENCIL_SIZE, 0, + EGL_SURFACE_TYPE, EGL_WINDOW_BIT, + EGL_TRANSPARENT_TYPE, EGL_NONE, + EGL_TRANSPARENT_RED_VALUE, EGL_DONT_CARE, + EGL_TRANSPARENT_GREEN_VALUE,EGL_DONT_CARE, + EGL_TRANSPARENT_BLUE_VALUE, EGL_DONT_CARE, + EGL_NONE +}; +static SDL_GLES_ContextPriv *cur_context = NULL; + +static const char * get_error_string(int error) { + switch (error) { + case EGL_SUCCESS: + return "EGL_SUCCESS"; + case EGL_NOT_INITIALIZED: + return "EGL_NOT_INITIALIZED"; + case EGL_BAD_ACCESS: + return "EGL_BAD_ACCESS"; + case EGL_BAD_ALLOC: + return "EGL_BAD_ALLOC"; + case EGL_BAD_ATTRIBUTE: + return "EGL_BAD_ATTRIBUTE"; + case EGL_BAD_CONFIG: + return "EGL_BAD_CONFIG"; + case EGL_BAD_CONTEXT: + return "EGL_BAD_CONTEXT"; + case EGL_BAD_CURRENT_SURFACE: + return "EGL_BAD_CURRENT_SURFACE"; + case EGL_BAD_DISPLAY: + return "EGL_BAD_DISPLAY"; + case EGL_BAD_MATCH: + return "EGL_BAD_MATCH"; + case EGL_BAD_NATIVE_PIXMAP: + return "EGL_BAD_NATIVE_PIXMAP"; + case EGL_BAD_NATIVE_WINDOW: + return "EGL_BAD_NATIVE_WINDOW"; + case EGL_BAD_PARAMETER: + return "EGL_BAD_PARAMETER"; + case EGL_BAD_SURFACE: + return "EGL_BAD_SURFACE"; + case EGL_CONTEXT_LOST: + return "EGL_CONTEXT_LOST"; + default: + return "EGL_UNKNOWN_ERROR"; + } +} + +int SDL_GLES_LoadLibrary(const char *path) +{ + if (!path) { + path = getenv("SDL_VIDEO_GL_DRIVER"); + if (!path) { + switch (gl_version) { + case SDL_GLES_VERSION_1_1: + case SDL_GLES_VERSION_2_0: + path = default_libgl[gl_version]; + break; + default: + SDL_SetError("No GL version specific and SDL_VIDEO_GL_DRIVER set"); + return -1; + } + } + } + + /* Dynamically load the desired GL library */ + gl_handle = dlopen(path, RTLD_LAZY|RTLD_GLOBAL); + if (!gl_handle) { + SDL_SetError("Failed to open GL library: %s (%s)", path, dlerror()); + return -2; + } + + return 0; +} + +void* SDL_GLES_GetProcAddress(const char *proc) +{ + if (!gl_handle) return NULL; + return dlsym(gl_handle, proc); +} + +int SDL_GLES_Init(SDL_GLES_Version version) +{ + SDL_SysWMinfo info; + EGLBoolean res; + + SDL_VERSION(&info.version); + if (SDL_GetWMInfo(&info) != 1) { + SDL_SetError("SDL_gles is incompatible with this SDL version"); + return -1; + } + + display = info.info.x11.gfxdisplay; + + egl_display = eglGetDisplay((EGLNativeDisplayType)display); + if (egl_display == EGL_NO_DISPLAY) { + SDL_SetError("EGL found no available displays"); + return -2; + } + + res = eglInitialize(egl_display, &egl_major, &egl_minor); + if (!res) { + SDL_SetError("EGL failed to initialize: %s", + get_error_string(eglGetError())); + return -2; + } + + gl_version = version; + return 0; +} + +void SDL_GLES_Quit() +{ + if (gl_handle) { + dlclose(gl_handle); + gl_handle = NULL; + } + if (egl_display != EGL_NO_DISPLAY) { + eglTerminate(egl_display); + egl_display = EGL_NO_DISPLAY; + } +} + +int SDL_GLES_SetVideoMode() +{ + SDL_SysWMinfo info; + + SDL_VERSION(&info.version); + if (SDL_GetWMInfo(&info) != 1) { + SDL_SetError("SDL_gles is incompatible with this SDL version"); + return -1; + } + + /* Destroy previous surface, if any. */ + if (egl_surface != EGL_NO_SURFACE) { + eglDestroySurface(egl_display, egl_surface); + egl_surface = EGL_NO_SURFACE; + } + + /* No current context? Quietly defer surface creation. */ + if (!cur_context) { + return 0; + } + + egl_surface = eglCreateWindowSurface(egl_display, cur_context->egl_config, + (EGLNativeWindowType)info.info.x11.window, NULL); + if (egl_surface == EGL_NO_SURFACE) { + SDL_SetError("EGL failed to create a window surface: %s", + get_error_string(eglGetError())); + return -2; + } + + return 0; +} + +SDL_GLES_Context* SDL_GLES_CreateContext(void) +{ + SDL_GLES_ContextPriv *context = malloc(sizeof(SDL_GLES_ContextPriv)); + if (!context) { + SDL_Error(SDL_ENOMEM); + return NULL; + } + + EGLBoolean res; + EGLConfig configs[1]; + EGLint num_config; + + res = eglChooseConfig(egl_display, attrib_list, configs, 1, &num_config); + if (!res || num_config < 1) { + SDL_SetError("EGL failed to find any valid config with required attributes: %s", + get_error_string(eglGetError())); + return NULL; + } + + context->egl_config = configs[0]; + context->egl_context = eglCreateContext(egl_display, configs[0], + EGL_NO_CONTEXT, NULL); + + return (SDL_GLES_Context*) context; +} + +void SDL_GLES_DeleteContext(SDL_GLES_Context* c) +{ + SDL_GLES_ContextPriv *context = (SDL_GLES_ContextPriv*)c; + if (!context) return; + + if (cur_context == context) { + /* Deleting the active context */ + SDL_GLES_MakeCurrent(NULL); + } + + eglDestroyContext(egl_display, context->egl_context); + free(context); +} + +int SDL_GLES_MakeCurrent(SDL_GLES_Context* c) +{ + SDL_GLES_ContextPriv *context = (SDL_GLES_ContextPriv*)c; + int res; + + if (context) { + cur_context = context; + + res = SDL_GLES_SetVideoMode(); + if (res != 0) return res; /* Surface (re-)creation failed. */ + + res = eglMakeCurrent(egl_display, egl_surface, egl_surface, + context->egl_context); + + if (!res) { + SDL_SetError("EGL failed to make current: %s", + get_error_string(eglGetError())); + cur_context = NULL; + return -2; + } + } else { + eglMakeCurrent(egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, + EGL_NO_CONTEXT); + cur_context = NULL; + SDL_GLES_SetVideoMode(); /* Will clear current surface. */ + } + + // TODO Update attrib_list + + switch (gl_version) { + case SDL_GLES_VERSION_1_1: + case SDL_GLES_VERSION_2_0: + res = eglBindAPI(EGL_OPENGL_ES_API); + if (!res) { + SDL_SetError("EGL failed to bind the required API: %s", + get_error_string(eglGetError())); + return -2; + } + break; + default: + break; + } + + return 0; +} + +void SDL_GLES_SwapBuffers() +{ + eglSwapBuffers(egl_display, egl_surface); +} + diff --git a/sdlgles/src/SDL_gles.h b/sdlgles/src/SDL_gles.h new file mode 100644 index 0000000..9f74339 --- /dev/null +++ b/sdlgles/src/SDL_gles.h @@ -0,0 +1,95 @@ +/* This file is part of SDL_gles - SDL addon for OpenGL|ES + * Copyright (C) 2010 Javier S. Pedro + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 3 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA or see . + */ + +#ifndef __SDL_GLES_H +#define __SDL_GLES_H + +/* Set up for C function definitions, even when using C++ */ +#ifdef __cplusplus +extern "C" { +#endif + +typedef enum SDL_GLES_Version +{ + SDL_GLES_VERSION_NONE = 0, + SDL_GLES_VERSION_1_1 = 1, + SDL_GLES_VERSION_2_0 = 2 +} SDL_GLES_Version; + +typedef struct SDL_GLES_Context +{ + /* Opaque pointer to an EGLContext */ +} SDL_GLES_Context; + +/** Invoke after SDL_Init. + @return 0 if SDL_gles was initialized correctly. + */ +extern DECLSPEC int SDLCALL SDL_GLES_Init(SDL_GLES_Version version); + +/** Invoke just before SDL_Quit. + */ +extern DECLSPEC void SDLCALL SDL_GLES_Quit(); + +/* Equivalent to SDL/GL ones. Untested. */ +/** Call before calling GetProcAddress. Dynamically loads a GLES library. + * @param path full path to the library to load, or leave as NULL to load + * the default GL ES library to the version specified in SDL_GLES_Init(). + * @return 0 if everything went OK. + */ +extern DECLSPEC int SDLCALL SDL_GLES_LoadLibrary(const char *path); +/** Returns the address of a symbol in the loaded GL ES library. + * @param name of the symbol to look up. + * @return address of the symbol or NULL. + */ +extern DECLSPEC void* SDLCALL SDL_GLES_GetProcAddress(const char *proc); + +/** Creates a new GL ES rendering context. This is where all your textures, + * etc. are stored. You need one for rendering; after creating it, make sure + * it is the current one calling SDL_GLES_MakeCurrent(). + * @return the created context or NULL. + */ +extern DECLSPEC SDL_GLES_Context* SDLCALL SDL_GLES_CreateContext(void); +/** Deletes an existing GL ES rendering context. This can delete the current + * context, but after that no context will be current. + * @param context context to delete + */ +extern DECLSPEC void SDLCALL SDL_GLES_DeleteContext(SDL_GLES_Context *context); + +/** Call after calling SDL_SetVideoMode() if you have an active context + * to refresh the surface parameters. + * @return 0 if everything went OK. + */ +extern DECLSPEC int SDLCALL SDL_GLES_SetVideoMode(void); +/** Makes a context the current one. All GLES calls will use it from now on. + * @param context context to use + * @return 0 if everything went OK. + */ +extern DECLSPEC int SDLCALL SDL_GLES_MakeCurrent(SDL_GLES_Context *context); + +/** Equivalent to SDL_Flip(). Call when you're finished issuing GL calls + * and want to draw the color buffer contents to the window surface. + */ +extern DECLSPEC void SDLCALL SDL_GLES_SwapBuffers(void); + +/* Ends C function definitions when using C++ */ +#ifdef __cplusplus +} +#endif + +#endif diff --git a/sdlgles/test/Makefile b/sdlgles/test/Makefile new file mode 100644 index 0000000..b2006e0 --- /dev/null +++ b/sdlgles/test/Makefile @@ -0,0 +1,26 @@ +CFLAGS:=-g -O0 -Wall + +TEST_LDLIBS:=$(shell sdl-config --libs) -lSDL_gles -lEGL +TEST_CFLAGS:=$(shell sdl-config --cflags) + +TEST_1_LDLIBS:=-lGLES_CM +TEST_2_LDLIBS:=-lGLESv2 + +TESTS_1:=gles1 +TESTS_2:=gles2 +TESTS:=$(TESTS_1) $(TESTS_2) + +all: $(TESTS) + +$(TESTS_1): %: %.o + $(CC) $(LDFLAGS) $(TEST_LDFLAGS) $(LDLIBS) $(TEST_1_LDLIBS) $(TEST_LDLIBS) -o $@ $^ + +$(TESTS_2): %: %.o + $(CC) $(LDFLAGS) $(TEST_LDFLAGS) $(LDLIBS) $(TEST_2_LDLIBS) $(TEST_LDLIBS) -o $@ $^ + +%.o: %.c + $(CC) $(CFLAGS) $(TEST_CFLAGS) -c -o $@ $^ + +clean: + rm -f *.o $(TESTS) + diff --git a/sdlgles/test/gles1.c b/sdlgles/test/gles1.c new file mode 100644 index 0000000..704031a --- /dev/null +++ b/sdlgles/test/gles1.c @@ -0,0 +1,98 @@ +/* gles1 - a simple SDL_gles OpenGL|ES 1.1 sample + * + * This file is in the public domain, furnished "as is", without technical + * support, and with no warranty, express or implied, as to its usefulness for + * any purpose. + */ + +#include +#include +#include +#include + +#include +#include + +#include + +static SDL_Surface *screen; +static SDL_GLES_Context *context; + +static float box_step = 0.1f; + +static const float w = 0.28f, h = 0.4f; +static float x = -1.0f, y = 0.0f; +static float box_v[4*3]; + +static Uint32 tick(Uint32 interval, void* param) +{ + SDL_Event e; + e.type = SDL_VIDEOEXPOSE; + + x += box_step; + if (x >= 1.0f || x <= -1.0f) { + box_step *= -1.0f; + } + + const float x1 = x - w/2, y1 = y - h/2; + const float x2 = x + w/2, y2 = y + h/2; + const float z = 0.5f; + box_v[0] = x1; box_v[1] = y1; box_v[2] = z; + box_v[3] = x2; box_v[4] = y1; box_v[5] = z; + box_v[6] = x1; box_v[7] = y2; box_v[8] = z; + box_v[9] = x2; box_v[10] = y2; box_v[11] = z; + + SDL_PushEvent(&e); + + return interval; +} + +int main() +{ + int res; + res = SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER); + assert(res == 0); + + res = SDL_GLES_Init(SDL_GLES_VERSION_1_1); + assert(res == 0); + + screen = SDL_SetVideoMode(0, 0, 16, SDL_SWSURFACE); + assert(screen); + + SDL_TimerID timer = SDL_AddTimer(10, tick, NULL); + assert(timer != NULL); + + context = SDL_GLES_CreateContext(); + assert(context); + + SDL_GLES_MakeCurrent(context); + + glMatrixMode(GL_MODELVIEW); + glLoadIdentity(); + + glClearColor(0.0f, 0.0f, 1.0f, 0.0f); + glColor4f(0.0f, 1.0f, 0.0f, 1.0f); + glEnableClientState(GL_VERTEX_ARRAY); + glVertexPointer(3, GL_FLOAT, 0, box_v); + + SDL_Event event; + while (SDL_WaitEvent(&event)) { + switch (event.type) { + case SDL_QUIT: + goto quit; + case SDL_VIDEOEXPOSE: + glClear(GL_COLOR_BUFFER_BIT); + glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); + SDL_GLES_SwapBuffers(); + break; + } + } + +quit: + SDL_GLES_DeleteContext(context); + + SDL_GLES_Quit(); + SDL_Quit(); + + return 0; +}