From 3e7ba806a23dfd3d75f9cc156df9229f237f5d04 Mon Sep 17 00:00:00 2001
From: Tom Gall <tom.gall@linaro.org>
Date: Mon, 6 Oct 2014 17:08:43 -0500
Subject: to esContext, hold references for RIEGL objects such as Display,
 Surface and Context

to EGLAddOn.cpp, sort out and add init routine to setup and string
together various background objects that the reference implementation
needs in order to render to a buffer space.

to tests/font/main.c, add an Update function and change to use
the drawn into OpenVG buffer that we've read back.

font renders to the screen now but the pixels aren't interpreted
quite right. On the right track tho.
---
 include/esUtil.h    |  3 +++
 src/vg/Api.cpp      |  9 ++++++++-
 src/vg/EGLAddOn.cpp | 39 +++++++++++++++++++++++++++++++++++----
 tests/font/main.c   | 34 ++++++++++++++++++++++++++++++++++
 4 files changed, 80 insertions(+), 5 deletions(-)

diff --git a/include/esUtil.h b/include/esUtil.h
index c41a599..faa87fd 100644
--- a/include/esUtil.h
+++ b/include/esUtil.h
@@ -90,6 +90,9 @@ typedef struct _escontext
    EGLConfig eglConfig;
 
    void *vgContext;
+   void *rieglSurface;
+   void *rieglDisplay;
+   void *rieglContext;
 
    /// Callbacks
    void (ESCALLBACK *drawFunc) ( struct _escontext * );
diff --git a/src/vg/Api.cpp b/src/vg/Api.cpp
index 5b97a50..10dcc0d 100644
--- a/src/vg/Api.cpp
+++ b/src/vg/Api.cpp
@@ -511,7 +511,14 @@ void RI_APIENTRY vgSetiv(VGParamType type, VGint count, const VGint * values)
 
 void RI_APIENTRY vgSetfv(VGParamType type, VGint count, const VGfloat * values)
 {
-	RI_GET_CONTEXT(RI_NO_RETVAL);
+	OSAcquireMutex(); 
+	VGContext* context = (VGContext*)eglvgGetCurrentVGContext(); 
+	if(!context) 
+	{ 
+		OSReleaseMutex(); 
+		return RI_NO_RETVAL;
+	}
+//	RI_GET_CONTEXT(RI_NO_RETVAL);
 	RI_IF_ERROR(count < 0, VG_ILLEGAL_ARGUMENT_ERROR, RI_NO_RETVAL);
 	RI_IF_ERROR((!values && count > 0) || (values && !isAligned(values,4)), VG_ILLEGAL_ARGUMENT_ERROR, RI_NO_RETVAL);
 	setifv(context, type, count, values, true);
diff --git a/src/vg/EGLAddOn.cpp b/src/vg/EGLAddOn.cpp
index e8da666..f8d25bc 100644
--- a/src/vg/EGLAddOn.cpp
+++ b/src/vg/EGLAddOn.cpp
@@ -306,7 +306,9 @@ public:
 
 	int                getNumConfigs() const              { return EGL_NUMCONFIGS; }
     const RIEGLConfig& getConfig(int i) const             { RI_ASSERT(i >= 0 && i < EGL_NUMCONFIGS); return m_configs[i]; }
-    const RIEGLConfig& getConfig(const EGLConfig config) const        { for(int i=0;i<EGL_NUMCONFIGS;i++) { if(m_configs[i].m_config == config) return m_configs[i]; } RI_ASSERT(0); return m_configs[0]; }
+    const RIEGLConfig& getConfig(const EGLConfig config) const        { for(int i=0;i<EGL_NUMCONFIGS;i++) { if(m_configs[i].m_config == config) return m_configs[i]; } 
+	  // RI_ASSERT(0); 
+	   return m_configs[0]; }
 
     const EGLDisplay  getID() const                       { return m_id; }
 
@@ -838,19 +840,48 @@ extern "C"
 void tgOpenVGCreateContext(ESContext *esContext) {
 
 	EGL* egl = getEGL();
+	RIEGLSurface *riSurfaceDraw;
+	RIEGLDisplay *riD;
+	RIEGLContext *riC;
+	Drawable *d;
 
 	RIEGLThread* thread = egl->getThread();
-	tgOpenVG::VGContext* vgctx = NULL;
-	RIEGLContext* c = NULL;
+	if (!thread) {
+		thread = RI_NEW(RIEGLThread, (OSGetCurrentThreadID() ));
+	} 
+
+	/* sane defaults */
+	int colorSpace = EGL_VG_COLORSPACE_sRGB;
+	int alphaFormat = EGL_VG_ALPHA_FORMAT_NONPRE;
 
+	tgOpenVG::VGContext* vgctx = NULL;
 	try {
 		vgctx = RI_NEW(tgOpenVG::VGContext, (NULL));   //throws bad_alloc
-		c = RI_NEW(RIEGLContext, (vgctx, esContext->eglConfig));  //throws bad_alloc
+		riC = RI_NEW(RIEGLContext, (vgctx, esContext->eglConfig));  //throws bad_alloc
+
 		esContext->vgContext = vgctx;
 
+		riD=RI_NEW(RIEGLDisplay, (esContext->eglDisplay));
+		riD->addContext(riC);
+
+		d = RI_NEW(Drawable, (riD->getConfig(esContext->eglConfig).configToDescriptor((colorSpace == EGL_VG_COLORSPACE_LINEAR) ? false : true, (alphaFormat == EGL_VG_ALPHA_FORMAT_PRE) ? true : false), esContext->width, esContext->height, riD->getConfig(esContext->eglConfig).m_samples, riD->getConfig(esContext->eglConfig).m_maskBits)); 
+
+		riSurfaceDraw=RI_NEW(RIEGLSurface, (esContext->eglContext, esContext->eglConfig, d, false , EGL_BACK_BUFFER));
+		riD->addSurface(riSurfaceDraw);
+
+		thread->makeCurrent(riC, riSurfaceDraw);
+		riC->getVGContext()->setDefaultDrawable(riSurfaceDraw->getDrawable());
+
+		egl->addCurrentThread(thread);
 	}
 	catch (std::bad_alloc) {
 	}
+
+	riC->addReference();
+	riSurfaceDraw->addReference();
+	esContext->rieglSurface=riSurfaceDraw;
+	esContext->rieglDisplay=riD;
+	esContext->rieglContext=riC;
 }
 
 
diff --git a/tests/font/main.c b/tests/font/main.c
index d65cc09..10abf9a 100644
--- a/tests/font/main.c
+++ b/tests/font/main.c
@@ -476,6 +476,39 @@ GLuint CreateSimpleTexture2D( )
 
 }
 
+GLuint CreateVGTexture2D(ESContext *esContext)
+{
+   // Texture object handle
+   GLuint textureId;
+
+   // 2x2 Image, 3 bytes per pixel (R, G, B)
+   // Use tightly packed data
+   glPixelStorei ( GL_UNPACK_ALIGNMENT, 1 );
+
+   // Generate a texture object
+   glGenTextures ( 1, &textureId );
+
+   // Bind the texture object
+   glBindTexture ( GL_TEXTURE_2D, textureId );
+
+   // Load the texture
+   glTexImage2D ( GL_TEXTURE_2D, 0, GL_RGB, esContext->width, esContext->height, 0, GL_RGB, GL_UNSIGNED_BYTE, tgTextureBuffer);
+
+   // Set the filtering mode
+   glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
+   glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
+
+   return textureId;
+
+}
+
+void Update(ESContext *esContext, float deltaTime) {
+    UserData *userData = esContext ->userData;
+
+	glDeleteTextures ( 1, &userData->textureId );
+	userData->textureId = CreateVGTexture2D (esContext); 
+}
+
 ///
 // Initialize the shader and program object
 //
@@ -597,6 +630,7 @@ int main ( int argc, char *argv[] )
     initFont();
 
 	esRegisterDrawFunc ( &esContext, Draw );
+	esRegisterUpdateFunc ( &esContext, Update);
 
 	esMainLoop ( &esContext );
 
-- 
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