gsdx-ogl: restore gles build

Add the --gles build option to the linux main script
Ifdef all gl code not supported on gles3 (note some will be reenabled for gles3.1)

Note: it probably doesn't run anymore. My Nvidia driver doesn't support
yet egl/gles so I can't test it. Feel free to contribute.

build.sh

@@ -20,34 +20,26 @@ clean_build=false
 for f in $*
 do
 	case $f in
-		--dev|--devel)
+		--dev|--devel ) flags="$flags -DCMAKE_BUILD_TYPE=Devel" ;;
-			flags="$flags -DCMAKE_BUILD_TYPE=Devel"
+		--dbg|--debug ) flags="$flags -DCMAKE_BUILD_TYPE=Debug" ;;
-			;;
+		--release     ) flags="$flags -DCMAKE_BUILD_TYPE=Release" ;;
-		--dbg|--debug)
+		--glsl        ) flags="$flags -DGLSL_API=TRUE" ;;
-			flags="$flags -DCMAKE_BUILD_TYPE=Debug"
+		--egl         ) flags="$flags -DEGL_API=TRUE" ;;
-			;;
+		--gles        ) flags="$flags -DGLES_API=TRUE" ;;
-		--release)
+		--sdl2        ) flags="$flags -DSDL2_API=TRUE" ;;
-			flags="$flags -DCMAKE_BUILD_TYPE=Release"
+		--clean       ) clean_build=true ;;
-			;;
-        --glsl)
-			flags="$flags -DGLSL_API=TRUE"
-            ;;
-        --egl)
-            echo "Warning EGL needs at lesat MESA 9.0"
-			flags="$flags -DEGL_API=TRUE"
-            ;;
-		--clean)
-			clean_build=true
-			;;
 		*)
 			# unknown option
-			echo "Valid options are:"
+			echo "** User options **"
-			echo "--dev / --devel - Build PCSX2 as a Development build."
+			echo "--dev / --devel : Build PCSX2 as a Development build."
-			echo "--debug         - Build PCSX2 as a Debug build."
+			echo "--debug         : Build PCSX2 as a Debug build."
-			echo "--release       - Build PCSX2 as a Release build."
+			echo "--release       : Build PCSX2 as a Release build."
-			echo "--clean         - Do a clean build."
+			echo "--clean         : Do a clean build."
-            echo "--glsl          - Replace CG backend of ZZogl by GLSL"
+            echo "** Developper option **"
-            echo "--egl           - Replace GLX by EGL (ZZogl plugins only)"
+            echo "--glsl          : Replace CG backend of ZZogl by GLSL"
+            echo "--egl           : Replace GLX by EGL (ZZogl plugins only)"
+            echo "--sdl2          : Build with SDL2 (crash if wx is linked to SDL1)"
+            echo "--gles          : Replace openGL backend of GSdx by openGLES3"
 			exit 1;;
   	esac
 done

plugins/GSdx/GLLoader.h

@@ -211,7 +211,9 @@ extern PFNGLDEPTHRANGEDNVPROC                   gl_DepthRangedNV;
 #define gl_CheckFramebufferStatus glCheckFramebufferStatus
 #define gl_ClearBufferfv glClearBufferfv
 #define gl_ClearBufferiv glClearBufferiv
+#define gl_ClearBufferuiv glClearBufferuiv
 #define gl_CompileShader glCompileShader
+#define gl_ColorMask glColorMask
 #define gl_CreateProgram glCreateProgram
 #define gl_CreateShader glCreateShader
 #define gl_CreateShaderProgramv glCreateShaderProgramv

plugins/GSdx/GSDeviceOGL.cpp

@@ -487,6 +487,7 @@ void GSDeviceOGL::ClearDepth(GSTexture* t, float c)
 	// TODO is it possible with GL44 ClearTexture? no the API is garbage!
 	// Anyway, stencil can be cleared to 0 (it will be only used for date)
 	if (0 && GLLoader::found_GL_ARB_clear_texture) {
+#ifndef ENABLE_GLES
 		static_cast<GSTextureOGL*>(t)->EnableUnit();
 		// Yes a very nice API to mix float and integer
 		struct clear {
@@ -498,6 +499,7 @@ void GSDeviceOGL::ClearDepth(GSTexture* t, float c)
 		clear.stencil = 0;
 
 		gl_ClearTexImage(static_cast<GSTextureOGL*>(t)->GetID(), 0, GL_DEPTH_STENCIL, GL_FLOAT_32_UNSIGNED_INT_24_8_REV, &clear);
+#endif
 	} else {
 		OMSetFBO(m_fbo);
 		OMSetWriteBuffer();
@@ -519,8 +521,10 @@ void GSDeviceOGL::ClearStencil(GSTexture* t, uint8 c)
 {
 	// TODO is it possible with GL44 ClearTexture? no the API is garbage!
 	if (GLLoader::found_GL_ARB_clear_texture) {
+#ifndef ENABLE_GLES
 		static_cast<GSTextureOGL*>(t)->EnableUnit();
 		gl_ClearTexImage(static_cast<GSTextureOGL*>(t)->GetID(), 0, GL_DEPTH_STENCIL, GL_BYTE, &c);
+#endif
 	} else {
 		OMSetFBO(m_fbo);
 		OMSetWriteBuffer();
@@ -600,7 +604,9 @@ void GSDeviceOGL::BindDateTexture()
 	// gl_BindImageTextures(2, 1, textures);
 	//gl_BindImageTexture(2, 0, 0, true, 0, GL_READ_WRITE, GL_R32I);
 
+#ifndef ENABLE_GLES
 	gl_BindImageTexture(2, static_cast<GSTextureOGL*>(m_date.t)->GetID(), 0, false, 0, GL_READ_WRITE, GL_R32I);
+#endif
 }
 
 void GSDeviceOGL::RecycleDateTexture()
@@ -618,11 +624,13 @@ void GSDeviceOGL::RecycleDateTexture()
 
 void GSDeviceOGL::Barrier(GLbitfield b)
 {
+#ifndef ENABLE_GLES
 	gl_MemoryBarrier(b);
 //#ifdef ENABLE_OGL_STENCIL_DEBUG
 //	if (m_date.t)
 //		static_cast<GSTextureOGL*>(m_date.t)->Save(format("/tmp/barrier_%04ld.csv", g_draw_count));
 //#endif
+#endif
 }
 
 /* Note: must be here because tfx_glsl is static */
@@ -1027,7 +1035,9 @@ void GSDeviceOGL::PSSetShaderResource(GLuint sr)
 		GLState::tex_unit[0] = sr;
 
 		if (GLLoader::found_GL_ARB_multi_bind) {
+#ifndef ENABLE_GLES
 			gl_BindTextures(0, 1, &sr);
+#endif
 		} else {
 			gl_ActiveTexture(GL_TEXTURE0);
 			glBindTexture(GL_TEXTURE_2D, sr);
@@ -1045,7 +1055,9 @@ void GSDeviceOGL::PSSetShaderResources(GLuint tex[2])
 		GLState::tex_unit[1] = tex[1];
 
 		if (GLLoader::found_GL_ARB_multi_bind) {
+#ifndef ENABLE_GLES
 			gl_BindTextures(0, 2, tex);
+#endif
 		} else {
 			gl_ActiveTexture(GL_TEXTURE0);
 			glBindTexture(GL_TEXTURE_2D, tex[0]);

plugins/GSdx/GSDeviceOGL.h

@@ -106,7 +106,11 @@ public:
 			GLState::b_msk = m_b_msk;
 			GLState::a_msk = m_a_msk;
 
+#ifdef ENABLE_GLES
+			gl_ColorMask(m_r_msk, m_g_msk, m_b_msk, m_a_msk);
+#else
 			gl_ColorMaski(0, m_r_msk, m_g_msk, m_b_msk, m_a_msk);
+#endif
 		}
 	}
 
@@ -133,7 +137,11 @@ public:
 			if (GLState::eq_RGB != m_equation_RGB || GLState::eq_A != m_equation_A) {
 				GLState::eq_RGB = m_equation_RGB;
 				GLState::eq_A   = m_equation_A;
+#ifdef ENABLE_GLES
+				gl_BlendEquationSeparate(m_equation_RGB, m_equation_A);
+#else
 				gl_BlendEquationSeparateiARB(0, m_equation_RGB, m_equation_A);
+#endif
 			}
 			// FIXME align then SSE
 			if (GLState::f_sRGB != m_func_sRGB || GLState::f_dRGB != m_func_dRGB || GLState::f_sA != m_func_sA || GLState::f_dA != m_func_dA) {
@@ -141,7 +149,11 @@ public:
 				GLState::f_dRGB = m_func_dRGB;
 				GLState::f_sA = m_func_sA;
 				GLState::f_dA = m_func_dA;
+#ifdef ENABLE_GLES
+				gl_BlendFuncSeparate(m_func_sRGB, m_func_dRGB, m_func_sA, m_func_dA);
+#else
 				gl_BlendFuncSeparateiARB(0, m_func_sRGB, m_func_dRGB, m_func_sA, m_func_dA);
+#endif
 			}
 		}
 	}

plugins/GSdx/GSRendererOGL.cpp

@@ -522,8 +522,10 @@ void GSRendererOGL::DrawPrims(GSTexture* rt, GSTexture* ds, GSTextureCache::Sour
 		dev->SetupPS(ps_sel);
 
 		// Be sure that first pass is finished !
+#ifndef ENABLE_GLES
 		if (!UserHacks_DateGL4)
 			dev->Barrier(GL_SHADER_IMAGE_ACCESS_BARRIER_BIT);
+#endif
 	}
 
 	if(context->TEST.DoFirstPass())

plugins/GSdx/GSShaderOGL.cpp

@@ -153,6 +153,7 @@ void GSShaderOGL::SetSamplerBinding(GLuint prog, GLchar* name, GLuint binding)
 
 void GSShaderOGL::SetupRessources()
 {
+#ifndef ENABLE_GLES
 	if (!GLLoader::found_GL_ARB_bindless_texture) return;
 
 	if (GLState::dirty_ressources) {
@@ -166,6 +167,7 @@ void GSShaderOGL::SetupRessources()
 			gl_UniformHandleui64vARB(0, count, GLState::tex_handle);
 		}
 	}
+#endif
 }
 
 void GSShaderOGL::SetupUniform()
@@ -201,6 +203,7 @@ void GSShaderOGL::SetupUniform()
 
 void GSShaderOGL::SetupSubroutineUniform()
 {
+#ifndef ENABLE_GLES
 	if (!GLLoader::found_GL_ARB_shader_subroutine) return;
 
 	if (GLState::dirty_subroutine_vs && m_vs_sub_count) {
@@ -212,6 +215,7 @@ void GSShaderOGL::SetupSubroutineUniform()
 		gl_UniformSubroutinesuiv(GL_FRAGMENT_SHADER, m_ps_sub_count,  m_ps_sub);
 		GLState::dirty_subroutine_ps = false;
 	}
+#endif
 }
 
 bool GSShaderOGL::ValidateShader(GLuint s)

plugins/GSdx/GSTextureFXOGL.cpp

@@ -65,9 +65,11 @@ void GSDeviceOGL::CreateTextureFX()
 	// because of -1 we loose lot of precision for small GS value
 	// This extension allow FS depth to range from -1 to 1. So
 	// gl_position.z could range from [0, 1]
+#ifndef ENABLE_GLES
 	if (GLLoader::found_GL_NV_depth_buffer_float) {
 		gl_DepthRangedNV(-1.0f, 1.0f);
 	}
+#endif
 }
 
 GSDepthStencilOGL* GSDeviceOGL::CreateDepthStencil(OMDepthStencilSelector dssel)

plugins/GSdx/GSTextureOGL.cpp

@@ -40,11 +40,13 @@ namespace PboPool {
 	const uint32 m_pbo_size = (640*480*16) << 2;
 	bool m_buffer_storage = false;
 
+#ifndef ENABLE_GLES
 	// Option for buffer storage
 	// Note there is a barrier (but maybe coherent is faster)
 	const GLbitfield map_flags = GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT | GL_MAP_COHERENT_BIT;
 	// FIXME do I need GL_DYNAMIC_STORAGE_BIT to allow write?
 	const GLbitfield create_flags = map_flags | GL_DYNAMIC_STORAGE_BIT;
+#endif
 
 	// Normally driver must aligned the map....
 	void* align_map(void* ptr) {
@@ -66,10 +68,12 @@ namespace PboPool {
 
 			// Note the +64 gives additional room to realign the buffer (buggy driver....)
 			if (m_buffer_storage) {
+#ifndef ENABLE_GLES
 				gl_BufferStorage(GL_PIXEL_UNPACK_BUFFER, m_pbo_size+64, NULL, create_flags);
 				m_map[m_current_pbo] = (char*)align_map(gl_MapBufferRange(GL_PIXEL_UNPACK_BUFFER, 0, m_pbo_size+64, map_flags));
 				// Workaround silly driver. (would be 0 otherwise)
 				m_offset[m_current_pbo] = m_initial_offset[m_current_pbo];
+#endif
 			} else {
 				gl_BufferData(GL_PIXEL_UNPACK_BUFFER, m_pbo_size+64, NULL, GL_STREAM_COPY);
 				m_map[m_current_pbo] = NULL;
@@ -317,8 +321,10 @@ GSTextureOGL::~GSTextureOGL()
 
 void GSTextureOGL::Clear(const void *data)
 {
+#ifndef ENABLE_GLES
 	EnableUnit();
 	gl_ClearTexImage(m_texture_id, 0,  m_int_format, m_int_type, data);
+#endif
 }
 
 bool GSTextureOGL::Update(const GSVector4i& r, const void* data, int pitch)
@@ -380,10 +386,12 @@ bool GSTextureOGL::Update(const GSVector4i& r, const void* data, int pitch)
 GLuint64 GSTextureOGL::GetHandle(GLuint sampler_id)
 {
 	ASSERT(sampler_id < 12);
+#ifndef ENABLE_GLES
 	if (!m_handles[sampler_id]) {
 		m_handles[sampler_id] = gl_GetTextureSamplerHandleARB(m_texture_id, sampler_id);
 		gl_MakeTextureHandleResidentARB(m_handles[sampler_id]);
 	}
+#endif
 
 	return m_handles[sampler_id];
 }
@@ -613,8 +621,10 @@ bool GSTextureOGL::Save(const string& fn, bool dds)
 		gl_ActiveTexture(GL_TEXTURE0 + 6);
 		glBindTexture(GL_TEXTURE_2D, m_texture_id);
 
+#ifndef ENABLE_GLES
 		glGetTexImage(GL_TEXTURE_2D, 0, GL_RED_INTEGER, GL_INT, image);
 		SaveRaw(fn, image, pitch);
+#endif
 
 		// Not supported in Save function
 		status = false;

plugins/GSdx/GSVertexArrayOGL.h

@@ -63,6 +63,7 @@ class GSBufferOGL {
 		m_limit = 2 * 2 * 1024 * 1024 / m_stride;
 
 		if (m_buffer_storage) {
+#ifndef ENABLE_GLES
 			bind();
 			// FIXME do I need the dynamic
 			const GLbitfield map_flags = GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT | GL_MAP_COHERENT_BIT;
@@ -70,6 +71,7 @@ class GSBufferOGL {
 
 			gl_BufferStorage(m_target, m_stride*m_limit, NULL, create_flags );
 			m_buffer_ptr = (uint8*) gl_MapBufferRange(m_target, 0, m_stride*m_limit, map_flags);
+#endif
 		} else {
 			m_buffer_ptr = NULL;
 		}