From d33cfef8bdaa07c6874e813a142a91b86fcde48a Mon Sep 17 00:00:00 2001
From: notaz <notasas@gmail.com>
Date: Wed, 12 Dec 2012 00:26:14 +0200
Subject: [PATCH 1/3] Don't restrict EGL color component sizes.

This makes SGX530 work when using 16bpp framebuffer.
---
 gfx/context/xegl_ctx.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/gfx/context/xegl_ctx.c b/gfx/context/xegl_ctx.c
index 9662fbf718..84249e4825 100644
--- a/gfx/context/xegl_ctx.c
+++ b/gfx/context/xegl_ctx.c
@@ -177,9 +177,9 @@ static bool gfx_ctx_init(void)
 
 #define EGL_ATTRIBS_BASE \
    EGL_SURFACE_TYPE,    EGL_WINDOW_BIT, \
-   EGL_RED_SIZE,        8, \
-   EGL_GREEN_SIZE,      8, \
-   EGL_BLUE_SIZE,       8, \
+   EGL_RED_SIZE,        0, \
+   EGL_GREEN_SIZE,      0, \
+   EGL_BLUE_SIZE,       0, \
    EGL_DEPTH_SIZE,      0, \
    EGL_STENCIL_SIZE,    0
 

From ee112fc3754f3c9cf415d09422e011a8443db20d Mon Sep 17 00:00:00 2001
From: notaz <notasas@gmail.com>
Date: Wed, 12 Dec 2012 00:36:15 +0200
Subject: [PATCH 2/3] Manually define GL_BGRA_EXT if needed.

It's missing in imgtec/SGX headers for some reason.
---
 gfx/gl_common.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gfx/gl_common.h b/gfx/gl_common.h
index 44cafbdfa8..8717544b5b 100644
--- a/gfx/gl_common.h
+++ b/gfx/gl_common.h
@@ -312,6 +312,10 @@ extern PFNGLACTIVETEXTUREPROC pglActiveTexture;
 #define RARCH_GL_FORMAT32 GL_UNSIGNED_INT_8_8_8_8_REV
 #define RARCH_GL_FORMAT16 GL_RGB5
 #elif defined(HAVE_OPENGLES)
+// Imgtec/SGX headers have this missing.
+#ifndef GL_BGRA_EXT
+#define GL_BGRA_EXT 0x80E1
+#endif
 #define RARCH_GL_INTERNAL_FORMAT32 GL_BGRA_EXT
 #define RARCH_GL_INTERNAL_FORMAT16 GL_RGB
 #define RARCH_GL_TEXTURE_TYPE32 GL_BGRA_EXT

From 3576bcedd974bffaf6222c73827a0c9655b1a863 Mon Sep 17 00:00:00 2001
From: notaz <notasas@gmail.com>
Date: Wed, 12 Dec 2012 02:34:01 +0200
Subject: [PATCH 3/3] Check for EGL/GLES/VG directly if pkgconfig is
 unavailable.

This also allows to remove some videocore special cases.
---
 Makefile          |  2 +-
 qb/config.libs.sh | 36 ++++++++++++++++++++++++------------
 2 files changed, 25 insertions(+), 13 deletions(-)

diff --git a/Makefile b/Makefile
index 3265be7760..c7ade66337 100644
--- a/Makefile
+++ b/Makefile
@@ -203,7 +203,7 @@ ifeq ($(HAVE_VG), 1)
 endif
 
 ifeq ($(HAVE_VIDEOCORE), 1)
-   LIBS += -lOpenVG -lGLESv2 -lEGL -lbcm_host -lvcos -lvchiq_arm
+   LIBS += -lbcm_host -lvcos -lvchiq_arm
 endif
 
 ifeq ($(HAVE_XVIDEO), 1)
diff --git a/qb/config.libs.sh b/qb/config.libs.sh
index f4ffbd0287..4aa3dd6e76 100644
--- a/qb/config.libs.sh
+++ b/qb/config.libs.sh
@@ -17,11 +17,17 @@ check_lib VIDEOCORE -lbcm_host bcm_host_init "-lvcos -lvchiq_arm"
 if [ "$HAVE_VIDEOCORE" = 'yes' ]; then
    [ -d /opt/vc/include ] && add_include_dirs /opt/vc/include
    [ -d /opt/vc/include/interface/vcos/pthreads ] && add_include_dirs /opt/vc/include/interface/vcos/pthreads
-   HAVE_GLES='yes'
-   HAVE_VG='yes'
-   HAVE_EGL='yes'
-else
+   HAVE_GLES='auto'
+   EXTRA_GL_LIBS="-lGLESv2 -lbcm_host -lvcos -lvchiq_arm"
+fi
+
+if [ "$HAVE_EGL" != "no" ]; then
    check_pkgconf EGL egl
+   # some systems have EGL libs, but no pkgconfig
+   if [ "$HAVE_EGL" = "no" ]; then
+      HAVE_EGL=auto && check_lib EGL "-lEGL $EXTRA_GL_LIBS"
+      [ "$HAVE_EGL" = "yes" ] && EGL_LIBS=-lEGL
+   fi
 fi
 
 if [ "$LIBRETRO" ]; then
@@ -149,17 +155,23 @@ fi
 
 check_pkgconf XML libxml-2.0
 
-# On videocore, these libraries will exist without proper pkg-config.
-if [ "$HAVE_VIDEOCORE" != "yes" ] && [ "$HAVE_EGL" = "yes" ]; then
-
-   if [ "$HAVE_XML" = "yes" ]; then
-      check_pkgconf GLES glesv2
-   else
+if [ "$HAVE_EGL" = "yes" ]; then
+   if [ "$HAVE_XML" != "yes" ]; then
       echo "Cannot find XML. GLES will not work."
       exit 1
    fi
-   check_pkgconf VG vg
-elif [ "$HAVE_VIDEOCORE" != "yes" ]; then
+   if [ "$HAVE_GLES" != "no" ]; then
+      HAVE_GLES=auto check_pkgconf GLES glesv2
+      [ "$HAVE_GLES" = "no" ] && HAVE_GLES=auto check_lib GLES "-lGLESv2 $EXTRA_GL_LIBS"
+   fi
+   if [ "$HAVE_VG" != "no" ]; then
+      check_pkgconf VG vg
+      if [ "$HAVE_VG" = "no" ]; then
+         HAVE_VG=auto check_lib VG "-lOpenVG $EXTRA_GL_LIBS"
+         [ "$HAVE_VG" = "yes" ] && VG_LIBS=-lOpenVG
+      fi
+   fi
+else
    HAVE_VG=no
    HAVE_GLES=no
 fi