ref_gl: allow enabling XASH_GLES without wrapper, add ref_gles3compat, wrap gles functions in gl2wrap when XASH_GLES enabled

ref/gl/gl2_shim/gl2_shim.c

@@ -18,7 +18,7 @@ GNU General Public License for more details.
 	this will only provide performance gains if vitaGL is built with DRAW_SPEEDHACK=1
 	since that makes it assume that all vertex data pointers are GPU-mapped
 */
-
+#ifndef XASH_GL_STATIC
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
@@ -167,7 +167,7 @@ static GLuint GL2_GenerateShader( const gl2wrap_prog_t *prog, GLenum type )
 	shader = shader_buf;
 	//shader[0] = '\n';
 	shader[0] = 0;
-	Q_strncat(shader, "#version 130\n", MAX_SHADERLEN);
+	Q_strncat(shader, "#version 300 es\n", MAX_SHADERLEN);
 
 	for ( i = 0; i < GL2_FLAG_MAX; ++i )
 	{
@@ -182,7 +182,7 @@ static GLuint GL2_GenerateShader( const gl2wrap_prog_t *prog, GLenum type )
 
 	id = pglCreateShaderObjectARB( type );
 	len = Q_strlen( shader );
-	pglShaderSourceARB( id, 1, (const void *)&shader, &len );
+	pglShaderSourceARB( id, 1, (void *)&shader, &len );
 	pglCompileShaderARB( id );
 	pglGetObjectParameterivARB( id, GL_OBJECT_COMPILE_STATUS_ARB, &status );
 	//pglGetOShaderiv( id, GL_OBJECT_COMPILE_STATUS_ARB, &status );
@@ -412,6 +412,13 @@ void GL2_Begin( GLenum prim )
 		pglDisableVertexAttribArrayARB( i );
 }
 
+unsigned short triquads_array[] =
+{
+	0, 1, 2, 0, 2, 3,
+	4, 5, 6, 4, 6, 7,
+	8, 9, 10, 8, 10, 11
+};
+
 void GL2_End( void )
 {
 	int i;
@@ -444,7 +451,16 @@ void GL2_End( void )
 		}
 	}
 
-	pglDrawArrays( gl2wrap.prim, 0, count );
+#ifdef XASH_GLES
+	if(gl2wrap.prim == GL_QUADS)
+	{
+		pglDrawElements(GL_TRIANGLES, Q_min(count / 4 * 6,sizeof(triquads_array)/2), GL_UNSIGNED_SHORT, triquads_array);
+	}
+	else if( gl2wrap.prim == GL_POLYGON )
+		pglDrawArrays( GL_TRIANGLE_FAN, 0, count );
+	else
+#endif
+		pglDrawArrays( gl2wrap.prim, 0, count );
 
 _leave:
 	gl2wrap.prim = GL_NONE;
@@ -452,6 +468,67 @@ _leave:
 	gl2wrap.cur_flags = 0;
 }
 
+#ifdef XASH_GLES
+void (*rpglTexImage2D)( GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const GLvoid *pixels );
+void GL2_TexImage2D( GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const GLvoid *pixels )
+{
+	void *data = (void*)pixels;
+	if( pixels && format == GL_RGBA && (
+		internalformat == GL_RGB ||
+		internalformat == GL_RGB8 ||
+		internalformat == GL_RGB5 ||
+		internalformat == GL_LUMINANCE ||
+		internalformat == GL_LUMINANCE8 ||
+		internalformat == GL_LUMINANCE4 )) // strip alpha from texture
+	{
+		unsigned char *in = data, *out;
+		int i = 0, size = width * height * 4;
+
+		data = out = (unsigned char*)malloc( size );
+
+		for( i = 0; i < size; i += 4, in += 4, out += 4 )
+		{
+			memcpy( out, in, 3 );
+			out[3] = 255;
+		}
+		internalformat = format;
+	}
+	if( internalformat == GL_LUMINANCE8_ALPHA8 )
+		internalformat = GL_RGBA;
+	rpglTexImage2D( target, level, internalformat, width, height, border, format, type, data );
+	if( data != pixels )
+		free(data);
+}
+void (*rpglTexParameteri)( GLenum target, GLenum pname, GLint param );
+void GL2_TexParameteri( GLenum target, GLenum pname, GLint param )
+{
+	if ( pname == GL_TEXTURE_BORDER_COLOR )
+	{
+		return; // not supported by opengl es
+	}
+	if ( ( pname == GL_TEXTURE_WRAP_S ||
+		   pname == GL_TEXTURE_WRAP_T ) &&
+		 param == GL_CLAMP )
+	{
+		param = 0x812F;
+	}
+
+	rpglTexParameteri( target, pname, param );
+}
+
+
+GLboolean (*rpglIsEnabled)(GLenum e);
+GLboolean GL2_IsEnabled(GLenum e)
+{
+	if(e == GL_FOG)
+		return fogging;
+	return rpglIsEnabled(e);
+}
+
+#endif
+
+
+
 void GL2_Vertex3f( GLfloat x, GLfloat y, GLfloat z )
 {
 	GLfloat *p = gl2wrap.attrbuf[GL2_ATTR_POS] + gl2wrap.end * 3;
@@ -586,6 +663,10 @@ void GL2_Hint( GLenum hint, GLenum val )
 
 void GL2_Enable( GLenum e )
 {
+#ifdef XASH_GLES
+	if( e == GL_TEXTURE_2D )
+		return;
+#endif
 	if( e == GL_FOG )
 		fogging = 1;
 	else if( e == GL_ALPHA_TEST )
@@ -595,6 +676,10 @@ void GL2_Enable( GLenum e )
 
 void GL2_Disable( GLenum e )
 {
+#ifdef XASH_GLES
+	if( e == GL_TEXTURE_2D )
+		return;
+#endif
 	if( e == GL_FOG )
 		fogging = 0;
 	else if( e == GL_ALPHA_TEST )
@@ -736,4 +821,13 @@ void GL2_ShimInstall( void )
 	GL2_OVERRIDE_PTR( LoadMatrixf )
 	GL2_OVERRIDE_PTR( Scalef )
 	GL2_OVERRIDE_PTR( Translatef )
+#ifdef XASH_GLES
+	rpglTexImage2D = pglTexImage2D;
+	rpglTexParameteri = pglTexParameteri;
+	rpglIsEnabled = pglIsEnabled;
+	GL2_OVERRIDE_PTR( TexParameteri )
+	GL2_OVERRIDE_PTR( TexImage2D )
+	GL2_OVERRIDE_PTR( IsEnabled )
+#endif
 }
+#endif

ref/gl/gl2_shim/vertex.glsl.inc

@@ -1,8 +1,8 @@
 R"(
 
 #define layout(x)
-#define in attribute
+//#define in attribute
-#define out varying
+//#define out varying
 
 layout(location = 0) in vec3 inPosition;
 #if ATTR_COLOR

ref/gl/gl_export.h

@@ -27,6 +27,8 @@ GNU General Public License for more details.
 #define XASH_GLES
 #define XASH_GL_STATIC
 #define REF_GL_KEEP_MANGLED_FUNCTIONS
+#elif defined XASH_GLES3COMPAT
+#define XASH_GLES
 #endif
 
 typedef uint GLenum;
@@ -1358,7 +1360,7 @@ APIENTRY_LINKAGE void GL_FUNCTION( glGenVertexArrays )( GLsizei n, const GLuint
 APIENTRY_LINKAGE GLboolean GL_FUNCTION( glIsVertexArray )( GLuint array );
 APIENTRY_LINKAGE void GL_FUNCTION( glSwapInterval ) ( int interval );
 
-#if !defined( XASH_GLES ) && !defined( XASH_GL4ES )
+#if !defined( XASH_GL_STATIC ) || (!defined( XASH_GLES ) && !defined( XASH_GL4ES ))
 APIENTRY_LINKAGE void GL_FUNCTION( glTexImage2DMultisample )(GLenum target, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height, GLboolean fixedsamplelocations);
 #endif /* !XASH_GLES && !XASH_GL4ES */
 

ref/gl/gl_image.c

@@ -1070,7 +1070,7 @@ static void GL_TextureImageRAW( gl_texture_t *tex, GLint side, GLint level, GLin
 	}
 	else if( tex->target == GL_TEXTURE_2D_MULTISAMPLE )
 	{
-#if !defined( XASH_GLES ) && !defined( XASH_GL4ES )
+#if !defined( XASH_GL_STATIC ) || (!defined( XASH_GLES ) && !defined( XASH_GL4ES ))
 		samplesCount = (GLsizei)gEngfuncs.pfnGetCvarFloat("gl_msaa_samples");
 		switch (samplesCount)
 		{

ref/gl/gl_local.h

@@ -40,7 +40,7 @@ int VGL_ShimInit( void );
 void VGL_ShimShutdown( void );
 void VGL_ShimEndFrame( void );
 #endif
-#if !defined(XASH_GLES) && !defined(XASH_GL_STATIC)
+#if !defined(XASH_GL_STATIC)
 #include "gl2_shim/gl2_shim.h"
 #endif
 
@@ -620,7 +620,7 @@ enum
 	GL_DRAW_RANGEELEMENTS_EXT,
 	GL_TEXTURE_MULTISAMPLE,
 	GL_ARB_TEXTURE_COMPRESSION_BPTC,
-	R_SHADER_OBJECTS_EXT,
+	GL_SHADER_OBJECTS_EXT,
 	GL_EXTCOUNT,		// must be last
 };
 

ref/gl/gl_opengl.c

@@ -304,6 +304,62 @@ static dllfunc_t shaderobjectsfuncs[] =
 { NULL, NULL }
 };
 
+static dllfunc_t shaderobjectsfuncs_gles[] =
+{
+	{ "glDeleteShader"             , (void **)&pglDeleteObjectARB },
+	//{ "glGetHandleARB"                , (void **)&pglGetHandleARB },
+	{ "glDetachShader"             , (void **)&pglDetachObjectARB },
+	{ "glCreateShader"       , (void **)&pglCreateShaderObjectARB },
+	{ "glShaderSource"             , (void **)&pglShaderSourceARB },
+	{ "glCompileShader"            , (void **)&pglCompileShaderARB },
+	{ "glCreateProgram"      , (void **)&pglCreateProgramObjectARB },
+	{ "glAttachShader"             , (void **)&pglAttachObjectARB },
+	{ "glLinkProgram"              , (void **)&pglLinkProgramARB },
+	{ "glUseProgram"         , (void **)&pglUseProgramObjectARB },
+	{ "glValidateProgram"          , (void **)&pglValidateProgramARB },
+	{ "glUniform1f"                , (void **)&pglUniform1fARB },
+	{ "glUniform2f"                , (void **)&pglUniform2fARB },
+	{ "glUniform3f"                , (void **)&pglUniform3fARB },
+	{ "glUniform4f"                , (void **)&pglUniform4fARB },
+	{ "glUniform1i"                , (void **)&pglUniform1iARB },
+	{ "glUniform2i"                , (void **)&pglUniform2iARB },
+	{ "glUniform3i"                , (void **)&pglUniform3iARB },
+	{ "glUniform4i"                , (void **)&pglUniform4iARB },
+	{ "glUniform1f"               , (void **)&pglUniform1fvARB },
+	{ "glUniform2fv"               , (void **)&pglUniform2fvARB },
+	{ "glUniform3fv"               , (void **)&pglUniform3fvARB },
+	{ "glUniform4fv"               , (void **)&pglUniform4fvARB },
+	{ "glUniform1iv"               , (void **)&pglUniform1ivARB },
+	{ "glUniform2iv"               , (void **)&pglUniform2ivARB },
+	{ "glUniform3iv"               , (void **)&pglUniform3ivARB },
+	{ "glUniform4iv"               , (void **)&pglUniform4ivARB },
+	{ "glUniformMatrix2fv"         , (void **)&pglUniformMatrix2fvARB },
+	{ "glUniformMatrix3fv"         , (void **)&pglUniformMatrix3fvARB },
+	{ "glUniformMatrix4fv"         , (void **)&pglUniformMatrix4fvARB },
+	{ "glGetShaderfv"     , (void **)&pglGetObjectParameterfvARB },
+	{ "glGetShaderiv"     , (void **)&pglGetObjectParameterivARB },
+	{ "glGetShaderInfoLog"               , (void **)&pglGetInfoLogARB },
+	{ "glGetAttachedObjects"       , (void **)&pglGetAttachedObjectsARB },
+	{ "glGetUniformLocation"       , (void **)&pglGetUniformLocationARB },
+	{ "glGetActiveUniform"         , (void **)&pglGetActiveUniformARB },
+	{ "glGetUniformfv"             , (void **)&pglGetUniformfvARB },
+	{ "glGetUniformiv"             , (void **)&pglGetUniformivARB },
+	{ "glGetShaderSource"          , (void **)&pglGetShaderSourceARB },
+	{ "glVertexAttribPointer"      , (void **)&pglVertexAttribPointerARB },
+	{ "glEnableVertexAttribArray"  , (void **)&pglEnableVertexAttribArrayARB },
+	{ "glDisableVertexAttribArray" , (void **)&pglDisableVertexAttribArrayARB },
+	{ "glBindAttribLocation"       , (void **)&pglBindAttribLocationARB },
+	{ "glGetActiveAttrib"          , (void **)&pglGetActiveAttribARB },
+	{ "glGetAttribLocation"        , (void **)&pglGetAttribLocationARB },
+	{ "glVertexAttrib2f"              , (void **)&pglVertexAttrib2fARB },
+	{ "glVertexAttrib2fv"             , (void **)&pglVertexAttrib2fvARB },
+	{ "glVertexAttrib3fv"             , (void **)&pglVertexAttrib3fvARB },
+	//{ "glVertexAttrib4f"              , (void **)&pglVertexAttrib4fARB },
+	//{ "glVertexAttrib4fv"             , (void **)&pglVertexAttrib4fvARB },
+	//{ "glVertexAttrib4ubv"            , (void **)&pglVertexAttrib4ubvARB },
+{ NULL, NULL }
+};
+
 
 /*
 ========================
@@ -603,7 +659,11 @@ void GL_InitExtensionsGLES( void )
 #elif defined( XASH_WES )
 	glConfig.context = CONTEXT_TYPE_GLES_2_X;
 	glConfig.wrapper = GLES_WRAPPER_WES;
+#elif defined( XASH_GLES3COMPAT )
+	glConfig.context = CONTEXT_TYPE_GLES_2_X;
+	glConfig.wrapper = GLES_WRAPPER_NONE;
 #else
+
 #error "unknown gles wrapper"
 #endif
 
@@ -644,6 +704,10 @@ void GL_InitExtensionsGLES( void )
 		case GL_ARB_TEXTURE_NPOT_EXT:
 			GL_CheckExtension( "GL_OES_texture_npot", NULL, "gl_texture_npot", extid );
 			break;
+		case GL_SHADER_OBJECTS_EXT:
+			GL_CheckExtension( "ES2 Shaders", shaderobjectsfuncs_gles, "gl_shaderobjects", extid );
+			break;
+
 		case GL_DEBUG_OUTPUT:
 			if( glw_state.extended )
 				GL_CheckExtension( "GL_KHR_debug", NULL, NULL, extid );
@@ -665,6 +729,7 @@ void GL_InitExtensionsGLES( void )
 			GL_SetExtension( extid, false );
 		}
 	}
+	GL2_ShimInit();
 }
 #else
 void GL_InitExtensionsBigGL( void )
@@ -761,7 +826,7 @@ void GL_InitExtensionsBigGL( void )
 	GL_CheckExtension( "GL_ARB_vertex_buffer_object", vbofuncs, "gl_vertex_buffer_object", GL_ARB_VERTEX_BUFFER_OBJECT_EXT );
 	GL_CheckExtension( "GL_ARB_texture_multisample", multisampletexfuncs, "gl_texture_multisample", GL_TEXTURE_MULTISAMPLE );
 	GL_CheckExtension( "GL_ARB_texture_compression_bptc", NULL, "gl_texture_bptc_compression", GL_ARB_TEXTURE_COMPRESSION_BPTC );
-	GL_CheckExtension( "GL_ARB_shader_objects", shaderobjectsfuncs, "gl_shaderobjects", R_SHADER_OBJECTS_EXT );
+	GL_CheckExtension( "GL_ARB_shader_objects", shaderobjectsfuncs, "gl_shaderobjects", GL_SHADER_OBJECTS_EXT );
 	if( GL_CheckExtension( "GL_ARB_shading_language_100", NULL, NULL, GL_SHADER_GLSL100_EXT ))
 	{
 		pglGetIntegerv( GL_MAX_TEXTURE_COORDS_ARB, &glConfig.max_texture_coords );

ref/gl/gl_rmain.c

@@ -1128,7 +1128,7 @@ void R_EndFrame( void )
 #if XASH_PSVITA
 	VGL_ShimEndFrame();
 #endif
-#if !defined(XASH_GLES) && !defined(XASH_GL_STATIC)
+#if !defined( XASH_GL_STATIC )
 	GL2_ShimEndFrame();
 #endif
 	// flush any remaining 2D bits

ref/gl/wscript

@@ -37,10 +37,9 @@ def build(bld):
 	if bld.env.DEST_OS == 'psvita':
 		libs += [ 'sdk_includes', 'vgl_shim' ]
 	else:
-		libs += [ 'gl2_shim' ]
 		libs += [ 'public', 'M' ]
 
-	source = bld.path.ant_glob(['*.c'])
+		source = bld.path.ant_glob(['*.c', 'gl2_shim/*.c'])
 	includes = '.'
 
 	targets = {
@@ -64,6 +63,11 @@ def build(bld):
 			'libs':    ['DL', 'gl4es', 'LOG'],
 			'defines': ['XASH_GL_STATIC', 'XASH_GL4ES'],
 		},
+		'ref_gles3compat': {
+			'enable':  bld.env.GLES3COMPAT,
+			'libs':    ['DL', 'gl4es', 'LOG'],
+			'defines': ['XASH_GLES3COMPAT'],
+		},
 	}
 
 	for k,v in targets.items():

wscript

@@ -90,7 +90,6 @@ SUBDIRS = [
 
 	# enabled on PSVita only
 	Subproject('ref/gl/vgl_shim',   lambda x: x.env.DEST_OS == 'psvita'),
-	Subproject('ref/gl/gl2_shim',   lambda x: not x.env.DEDICATED and x.env.GL),
 
 ]
 
@@ -100,6 +99,7 @@ REFDLLS = [
 	RefDll('gles1', False, 'NANOGL'),
 	RefDll('gles2', False, 'GLWES'),
 	RefDll('gl4es', False),
+	RefDll('gles3compat', False),
 ]
 
 def options(opt):