14 files changed, 131 insertions, 342 deletions

diff --git a/client/shaders/3d_interlaced_merge/opengl_fragment.glsl b/client/shaders/3d_interlaced_merge/opengl_fragment.glsl
index 25945ad7f..7cba61b39 100644
--- a/client/shaders/3d_interlaced_merge/opengl_fragment.glsl
+++ b/client/shaders/3d_interlaced_merge/opengl_fragment.glsl
@@ -6,9 +6,11 @@ uniform sampler2D textureFlags;
 #define rightImage normalTexture
 #define maskImage textureFlags
 
+varying mediump vec2 varTexCoord;
+
 void main(void)
 {
-	vec2 uv = gl_TexCoord[0].st;
+	vec2 uv = varTexCoord.st;
 	vec4 left = texture2D(leftImage, uv).rgba;
 	vec4 right = texture2D(rightImage, uv).rgba;
 	vec4 mask = texture2D(maskImage, uv).rgba;
diff --git a/client/shaders/3d_interlaced_merge/opengl_vertex.glsl b/client/shaders/3d_interlaced_merge/opengl_vertex.glsl
index 4e0b2b125..860049481 100644
--- a/client/shaders/3d_interlaced_merge/opengl_vertex.glsl
+++ b/client/shaders/3d_interlaced_merge/opengl_vertex.glsl
@@ -1,6 +1,7 @@
+varying mediump vec2 varTexCoord;
+
 void main(void)
 {
-	gl_TexCoord[0] = gl_MultiTexCoord0;
-	gl_Position = gl_Vertex;
-	gl_FrontColor = gl_BackColor = gl_Color;
+	varTexCoord = inTexCoord0;
+	gl_Position = inVertexPosition;
 }
diff --git a/client/shaders/default_shader/opengl_fragment.glsl b/client/shaders/default_shader/opengl_fragment.glsl
index 925ab6e1d..5018ac6ea 100644
--- a/client/shaders/default_shader/opengl_fragment.glsl
+++ b/client/shaders/default_shader/opengl_fragment.glsl
@@ -1,4 +1,6 @@
+varying lowp vec4 varColor;
+
 void main(void)
 {
-	gl_FragColor = gl_Color;
+	gl_FragColor = varColor;
 }
diff --git a/client/shaders/default_shader/opengl_vertex.glsl b/client/shaders/default_shader/opengl_vertex.glsl
index d0b16c8b0..d95a3c2d3 100644
--- a/client/shaders/default_shader/opengl_vertex.glsl
+++ b/client/shaders/default_shader/opengl_vertex.glsl
@@ -1,9 +1,7 @@
-uniform mat4 mWorldViewProj;
+varying lowp vec4 varColor;
 
 void main(void)
 {
-	gl_TexCoord[0] = gl_MultiTexCoord0;
-	gl_Position = mWorldViewProj * gl_Vertex;
-
-	gl_FrontColor = gl_BackColor = gl_Color;
+	gl_Position = mWorldViewProj * inVertexPosition;
+	varColor = inVertexColor;
 }
diff --git a/client/shaders/minimap_shader/opengl_fragment.glsl b/client/shaders/minimap_shader/opengl_fragment.glsl
index fa4f9cb1a..cef359e8a 100644
--- a/client/shaders/minimap_shader/opengl_fragment.glsl
+++ b/client/shaders/minimap_shader/opengl_fragment.glsl
@@ -2,9 +2,12 @@ uniform sampler2D baseTexture;
 uniform sampler2D normalTexture;
 uniform vec3 yawVec;
 
+varying lowp vec4 varColor;
+varying mediump vec2 varTexCoord;
+
 void main (void)
 {
-	vec2 uv = gl_TexCoord[0].st;
+	vec2 uv = varTexCoord.st;
 
 	//texture sampling rate
 	const float step = 1.0 / 256.0;
@@ -27,6 +30,6 @@ void main (void)
 
 	vec3 color = (1.1 * diffuse + 0.05 * height + 0.5 * specular) * base.rgb;
 	vec4 col = vec4(color.rgb, base.a);
-	col *= gl_Color;
+	col *= varColor;
 	gl_FragColor = vec4(col.rgb, base.a);
 }
diff --git a/client/shaders/minimap_shader/opengl_vertex.glsl b/client/shaders/minimap_shader/opengl_vertex.glsl
index 88f9356d5..1a9491805 100644
--- a/client/shaders/minimap_shader/opengl_vertex.glsl
+++ b/client/shaders/minimap_shader/opengl_vertex.glsl
@@ -1,9 +1,11 @@
-uniform mat4 mWorldViewProj;
 uniform mat4 mWorld;
 
+varying lowp vec4 varColor;
+varying mediump vec2 varTexCoord;
+
 void main(void)
 {
-	gl_TexCoord[0] = gl_MultiTexCoord0;
-	gl_Position = mWorldViewProj * gl_Vertex;
-	gl_FrontColor = gl_BackColor = gl_Color;
+	varTexCoord = inTexCoord0.st;
+	gl_Position = mWorldViewProj * inVertexPosition;
+	varColor = inVertexColor;
 }
diff --git a/client/shaders/nodes_shader/opengl_fragment.glsl b/client/shaders/nodes_shader/opengl_fragment.glsl
index 19e6c2d86..b58095063 100644
--- a/client/shaders/nodes_shader/opengl_fragment.glsl
+++ b/client/shaders/nodes_shader/opengl_fragment.glsl
@@ -1,6 +1,4 @@
 uniform sampler2D baseTexture;
-uniform sampler2D normalTexture;
-uniform sampler2D textureFlags;
 
 uniform vec4 skyBgColor;
 uniform float fogDistance;
@@ -17,21 +15,18 @@ varying vec3 vPosition;
 // cameraOffset + worldPosition (for large coordinates the limits of float
 // precision must be considered).
 varying vec3 worldPosition;
-varying float area_enable_parallax;
-
+varying lowp vec4 varColor;
+#ifdef GL_ES
+varying mediump vec2 varTexCoord;
+#else
+centroid varying vec2 varTexCoord;
+#endif
 varying vec3 eyeVec;
-varying vec3 tsEyeVec;
-varying vec3 lightVec;
-varying vec3 tsLightVec;
 
-bool normalTexturePresent = false;
-
-const float e = 2.718281828459;
-const float BS = 10.0;
 const float fogStart = FOG_START;
-const float fogShadingParameter = 1 / ( 1 - fogStart);
+const float fogShadingParameter = 1.0 / ( 1.0 - fogStart);
 
-#ifdef ENABLE_TONE_MAPPING
+#if ENABLE_TONE_MAPPING
 
 /* Hable's UC2 Tone mapping parameters
 	A = 0.22;
@@ -55,7 +50,7 @@ vec4 applyToneMapping(vec4 color)
 	const float gamma = 1.6;
 	const float exposureBias = 5.5;
 	color.rgb = uncharted2Tonemap(exposureBias * color.rgb);
-	// Precalculated white_scale from 
+	// Precalculated white_scale from
 	//vec3 whiteScale = 1.0 / uncharted2Tonemap(vec3(W));
 	vec3 whiteScale = vec3(1.036015346);
 	color.rgb *= whiteScale;
@@ -63,150 +58,26 @@ vec4 applyToneMapping(vec4 color)
 }
 #endif
 
-void get_texture_flags()
-{
-	vec4 flags = texture2D(textureFlags, vec2(0.0, 0.0));
-	if (flags.r > 0.5) {
-		normalTexturePresent = true;
-	}
-}
-
-float intensity(vec3 color)
-{
-	return (color.r + color.g + color.b) / 3.0;
-}
-
-float get_rgb_height(vec2 uv)
-{
-	return intensity(texture2D(baseTexture, uv).rgb);
-}
-
-vec4 get_normal_map(vec2 uv)
-{
-	vec4 bump = texture2D(normalTexture, uv).rgba;
-	bump.xyz = normalize(bump.xyz * 2.0 - 1.0);
-	return bump;
-}
-
-float find_intersection(vec2 dp, vec2 ds)
-{
-	float depth = 1.0;
-	float best_depth = 0.0;
-	float size = 0.0625;
-	for (int i = 0; i < 15; i++) {
-		depth -= size;
-		float h = texture2D(normalTexture, dp + ds * depth).a;
-		if (depth <= h) {
-			best_depth = depth;
-			break;
-		}
-	}
-	depth = best_depth;
-	for (int i = 0; i < 4; i++) {
-		size *= 0.5;
-		float h = texture2D(normalTexture,dp + ds * depth).a;
-		if (depth <= h) {
-			best_depth = depth;
-			depth += size;
-		} else {
-			depth -= size;
-		}
-	}
-	return best_depth;
-}
-
-float find_intersectionRGB(vec2 dp, vec2 ds)
-{
-	const float depth_step = 1.0 / 24.0;
-	float depth = 1.0;
-	for (int i = 0 ; i < 24 ; i++) {
-		float h = get_rgb_height(dp + ds * depth);
-		if (h >= depth)
-			break;
-		depth -= depth_step;
-	}
-	return depth;
-}
-
 void main(void)
 {
 	vec3 color;
-	vec4 bump;
-	vec2 uv = gl_TexCoord[0].st;
-	bool use_normalmap = false;
-	get_texture_flags();
-
-#ifdef ENABLE_PARALLAX_OCCLUSION
-	vec2 eyeRay = vec2 (tsEyeVec.x, -tsEyeVec.y);
-	const float scale = PARALLAX_OCCLUSION_SCALE / PARALLAX_OCCLUSION_ITERATIONS;
-	const float bias = PARALLAX_OCCLUSION_BIAS / PARALLAX_OCCLUSION_ITERATIONS;
+	vec2 uv = varTexCoord.st;
 
-#if PARALLAX_OCCLUSION_MODE == 0
-	// Parallax occlusion with slope information
-	if (normalTexturePresent && area_enable_parallax > 0.0) {
-		for (int i = 0; i < PARALLAX_OCCLUSION_ITERATIONS; i++) {
-			vec4 normal = texture2D(normalTexture, uv.xy);
-			float h = normal.a * scale - bias;
-			uv += h * normal.z * eyeRay;
-		}
-#endif
-
-#if PARALLAX_OCCLUSION_MODE == 1
-	// Relief mapping
-	if (normalTexturePresent && area_enable_parallax > 0.0) {
-		vec2 ds = eyeRay * PARALLAX_OCCLUSION_SCALE;
-		float dist = find_intersection(uv, ds);
-		uv += dist * ds;
-#endif
-	} else if (GENERATE_NORMALMAPS == 1 && area_enable_parallax > 0.0) {
-		vec2 ds = eyeRay * PARALLAX_OCCLUSION_SCALE;
-		float dist = find_intersectionRGB(uv, ds);
-		uv += dist * ds;
-	}
-#endif
-
-#if USE_NORMALMAPS == 1
-	if (normalTexturePresent) {
-		bump = get_normal_map(uv);
-		use_normalmap = true;
-	}
-#endif
-
-#if GENERATE_NORMALMAPS == 1
-	if (normalTexturePresent == false) {
-		float tl = get_rgb_height(vec2(uv.x - SAMPLE_STEP, uv.y + SAMPLE_STEP));
-		float t  = get_rgb_height(vec2(uv.x - SAMPLE_STEP, uv.y - SAMPLE_STEP));
-		float tr = get_rgb_height(vec2(uv.x + SAMPLE_STEP, uv.y + SAMPLE_STEP));
-		float r  = get_rgb_height(vec2(uv.x + SAMPLE_STEP, uv.y));
-		float br = get_rgb_height(vec2(uv.x + SAMPLE_STEP, uv.y - SAMPLE_STEP));
-		float b  = get_rgb_height(vec2(uv.x, uv.y - SAMPLE_STEP));
-		float bl = get_rgb_height(vec2(uv.x -SAMPLE_STEP, uv.y - SAMPLE_STEP));
-		float l  = get_rgb_height(vec2(uv.x - SAMPLE_STEP, uv.y));
-		float dX = (tr + 2.0 * r + br) - (tl + 2.0 * l + bl);
-		float dY = (bl + 2.0 * b + br) - (tl + 2.0 * t + tr);
-		bump = vec4(normalize(vec3 (dX, dY, NORMALMAPS_STRENGTH)), 1.0);
-		use_normalmap = true;
+	vec4 base = texture2D(baseTexture, uv).rgba;
+#ifdef USE_DISCARD
+	// If alpha is zero, we can just discard the pixel. This fixes transparency
+	// on GPUs like GC7000L, where GL_ALPHA_TEST is not implemented in mesa,
+	// and also on GLES 2, where GL_ALPHA_TEST is missing entirely.
+	if (base.a == 0.0) {
+		discard;
 	}
 #endif
-	vec4 base = texture2D(baseTexture, uv).rgba;
 
-#ifdef ENABLE_BUMPMAPPING
-	if (use_normalmap) {
-		vec3 L = normalize(lightVec);
-		vec3 E = normalize(eyeVec);
-		float specular = pow(clamp(dot(reflect(L, bump.xyz), E), 0.0, 1.0), 1.0);
-		float diffuse = dot(-E,bump.xyz);
-		color = (diffuse + 0.1 * specular) * base.rgb;
-	} else {
-		color = base.rgb;
-	}
-#else
 	color = base.rgb;
-#endif
 
-	vec4 col = vec4(color.rgb * gl_Color.rgb, 1.0); 
-	
-#ifdef ENABLE_TONE_MAPPING
+	vec4 col = vec4(color.rgb * varColor.rgb, 1.0);
+
+#if ENABLE_TONE_MAPPING
 	col = applyToneMapping(col);
 #endif
 
diff --git a/client/shaders/nodes_shader/opengl_vertex.glsl b/client/shaders/nodes_shader/opengl_vertex.glsl
index 0d8d0a2a5..c68df4a8e 100644
--- a/client/shaders/nodes_shader/opengl_vertex.glsl
+++ b/client/shaders/nodes_shader/opengl_vertex.glsl
@@ -1,4 +1,3 @@
-uniform mat4 mWorldViewProj;
 uniform mat4 mWorld;
 
 // Color of the light emitted by the sun.
@@ -16,12 +15,16 @@ varying vec3 vPosition;
 // cameraOffset + worldPosition (for large coordinates the limits of float
 // precision must be considered).
 varying vec3 worldPosition;
-
+varying lowp vec4 varColor;
+// The centroid keyword ensures that after interpolation the texture coordinates
+// lie within the same bounds when MSAA is en- and disabled.
+// This fixes the stripes problem with nearest-neighbour textures and MSAA.
+#ifdef GL_ES
+varying mediump vec2 varTexCoord;
+#else
+centroid varying vec2 varTexCoord;
+#endif
 varying vec3 eyeVec;
-varying vec3 lightVec;
-varying vec3 tsEyeVec;
-varying vec3 tsLightVec;
-varying float area_enable_parallax;
 
 // Color of the light emitted by the light sources.
 const vec3 artificialLight = vec3(1.04, 1.04, 1.04);
@@ -85,25 +88,13 @@ float snoise(vec3 p)
 
 void main(void)
 {
-	gl_TexCoord[0] = gl_MultiTexCoord0;
-	//TODO: make offset depending on view angle and parallax uv displacement
-	//thats for textures that doesnt align vertically, like dirt with grass
-	//gl_TexCoord[0].y += 0.008;
-
-	//Allow parallax/relief mapping only for certain kind of nodes
-	//Variable is also used to control area of the effect
-#if (DRAW_TYPE == NDT_NORMAL || DRAW_TYPE == NDT_LIQUID || DRAW_TYPE == NDT_FLOWINGLIQUID)
-	area_enable_parallax = 1.0;
-#else
-	area_enable_parallax = 0.0;
-#endif
-
+	varTexCoord = inTexCoord0.st;
 
-float disp_x;
-float disp_z;
+	float disp_x;
+	float disp_z;
 // OpenGL < 4.3 does not support continued preprocessor lines
 #if (MATERIAL_TYPE == TILE_MATERIAL_WAVING_LEAVES && ENABLE_WAVING_LEAVES) || (MATERIAL_TYPE == TILE_MATERIAL_WAVING_PLANTS && ENABLE_WAVING_PLANTS)
-	vec4 pos2 = mWorld * gl_Vertex;
+	vec4 pos2 = mWorld * inVertexPosition;
 	float tOffset = (pos2.x + pos2.y) * 0.001 + pos2.z * 0.002;
 	disp_x = (smoothTriangleWave(animationTimer * 23.0 + tOffset) +
 		smoothTriangleWave(animationTimer * 11.0 + tOffset)) * 0.4;
@@ -112,68 +103,43 @@ float disp_z;
 		smoothTriangleWave(animationTimer * 13.0 + tOffset)) * 0.5;
 #endif
 
-	worldPosition = (mWorld * gl_Vertex).xyz;
+	worldPosition = (mWorld * inVertexPosition).xyz;
 
 // OpenGL < 4.3 does not support continued preprocessor lines
 #if (MATERIAL_TYPE == TILE_MATERIAL_WAVING_LIQUID_TRANSPARENT || MATERIAL_TYPE == TILE_MATERIAL_WAVING_LIQUID_OPAQUE || MATERIAL_TYPE == TILE_MATERIAL_WAVING_LIQUID_BASIC) && ENABLE_WAVING_WATER
 	// Generate waves with Perlin-type noise.
 	// The constants are calibrated such that they roughly
 	// correspond to the old sine waves.
-	vec4 pos = gl_Vertex;
+	vec4 pos = inVertexPosition;
 	vec3 wavePos = worldPosition + cameraOffset;
 	// The waves are slightly compressed along the z-axis to get
 	// wave-fronts along the x-axis.
-	wavePos.x /= WATER_WAVE_LENGTH * 3;
-	wavePos.z /= WATER_WAVE_LENGTH * 2;
-	wavePos.z += animationTimer * WATER_WAVE_SPEED * 10;
-	pos.y += (snoise(wavePos) - 1) * WATER_WAVE_HEIGHT * 5;
+	wavePos.x /= WATER_WAVE_LENGTH * 3.0;
+	wavePos.z /= WATER_WAVE_LENGTH * 2.0;
+	wavePos.z += animationTimer * WATER_WAVE_SPEED * 10.0;
+	pos.y += (snoise(wavePos) - 1.0) * WATER_WAVE_HEIGHT * 5.0;
 	gl_Position = mWorldViewProj * pos;
 #elif MATERIAL_TYPE == TILE_MATERIAL_WAVING_LEAVES && ENABLE_WAVING_LEAVES
-	vec4 pos = gl_Vertex;
+	vec4 pos = inVertexPosition;
 	pos.x += disp_x;
 	pos.y += disp_z * 0.1;
 	pos.z += disp_z;
 	gl_Position = mWorldViewProj * pos;
 #elif MATERIAL_TYPE == TILE_MATERIAL_WAVING_PLANTS && ENABLE_WAVING_PLANTS
-	vec4 pos = gl_Vertex;
-	if (gl_TexCoord[0].y < 0.05) {
+	vec4 pos = inVertexPosition;
+	if (varTexCoord.y < 0.05) {
 		pos.x += disp_x;
 		pos.z += disp_z;
 	}
 	gl_Position = mWorldViewProj * pos;
 #else
-	gl_Position = mWorldViewProj * gl_Vertex;
+	gl_Position = mWorldViewProj * inVertexPosition;
 #endif
 
 
 	vPosition = gl_Position.xyz;
 
-	// Don't generate heightmaps when too far from the eye
-	float dist = distance (vec3(0.0, 0.0, 0.0), vPosition);
-	if (dist > 150.0) {
-		area_enable_parallax = 0.0;
-	}
-
-	vec3 sunPosition = vec3 (0.0, eyePosition.y * BS + 900.0, 0.0);
-
-	vec3 normal, tangent, binormal;
-	normal = normalize(gl_NormalMatrix * gl_Normal);
-	tangent = normalize(gl_NormalMatrix * gl_MultiTexCoord1.xyz);
-	binormal = normalize(gl_NormalMatrix * gl_MultiTexCoord2.xyz);
-
-	vec3 v;
-
-	lightVec = sunPosition - worldPosition;
-	v.x = dot(lightVec, tangent);
-	v.y = dot(lightVec, binormal);
-	v.z = dot(lightVec, normal);
-	tsLightVec = normalize (v);
-
-	eyeVec = -(gl_ModelViewMatrix * gl_Vertex).xyz;
-	v.x = dot(eyeVec, tangent);
-	v.y = dot(eyeVec, binormal);
-	v.z = dot(eyeVec, normal);
-	tsEyeVec = normalize (v);
+	eyeVec = -(mWorldView * inVertexPosition).xyz;
 
 	// Calculate color.
 	// Red, green and blue components are pre-multiplied with
@@ -182,16 +148,16 @@ float disp_z;
 	// The pre-baked colors are halved to prevent overflow.
 	vec4 color;
 	// The alpha gives the ratio of sunlight in the incoming light.
-	float nightRatio = 1 - gl_Color.a;
-	color.rgb = gl_Color.rgb * (gl_Color.a * dayLight.rgb + 
-		nightRatio * artificialLight.rgb) * 2;
-	color.a = 1;
+	float nightRatio = 1.0 - inVertexColor.a;
+	color.rgb = inVertexColor.rgb * (inVertexColor.a * dayLight.rgb +
+		nightRatio * artificialLight.rgb) * 2.0;
+	color.a = 1.0;
 
 	// Emphase blue a bit in darker places
 	// See C++ implementation in mapblock_mesh.cpp final_color_blend()
-	float brightness = (color.r + color.g + color.b) / 3;
+	float brightness = (color.r + color.g + color.b) / 3.0;
 	color.b += max(0.0, 0.021 - abs(0.2 * brightness - 0.021) +
 		0.07 * brightness);
 
-	gl_FrontColor = gl_BackColor = clamp(color, 0.0, 1.0);
+	varColor = clamp(color, 0.0, 1.0);
 }
diff --git a/client/shaders/object_shader/opengl_fragment.glsl b/client/shaders/object_shader/opengl_fragment.glsl
index 0534dc049..9a81d8185 100644
--- a/client/shaders/object_shader/opengl_fragment.glsl
+++ b/client/shaders/object_shader/opengl_fragment.glsl
@@ -1,6 +1,4 @@
 uniform sampler2D baseTexture;
-uniform sampler2D normalTexture;
-uniform sampler2D textureFlags;
 
 uniform vec4 emissiveColor;
 uniform vec4 skyBgColor;
@@ -10,22 +8,22 @@ uniform vec3 eyePosition;
 varying vec3 vNormal;
 varying vec3 vPosition;
 varying vec3 worldPosition;
+varying lowp vec4 varColor;
+#ifdef GL_ES
+varying mediump vec2 varTexCoord;
+#else
+centroid varying vec2 varTexCoord;
+#endif
 
 varying vec3 eyeVec;
-varying vec3 lightVec;
 varying float vIDiff;
 
-bool normalTexturePresent = false;
-bool texTileableHorizontal = false;
-bool texTileableVertical = false;
-bool texSeamless = false;
-
 const float e = 2.718281828459;
 const float BS = 10.0;
 const float fogStart = FOG_START;
-const float fogShadingParameter = 1 / ( 1 - fogStart);
+const float fogShadingParameter = 1.0 / (1.0 - fogStart);
 
-#ifdef ENABLE_TONE_MAPPING
+#if ENABLE_TONE_MAPPING
 
 /* Hable's UC2 Tone mapping parameters
 	A = 0.22;
@@ -49,7 +47,7 @@ vec4 applyToneMapping(vec4 color)
 	const float gamma = 1.6;
 	const float exposureBias = 5.5;
 	color.rgb = uncharted2Tonemap(exposureBias * color.rgb);
-	// Precalculated white_scale from 
+	// Precalculated white_scale from
 	//vec3 whiteScale = 1.0 / uncharted2Tonemap(vec3(W));
 	vec3 whiteScale = vec3(1.036015346);
 	color.rgb *= whiteScale;
@@ -57,99 +55,31 @@ vec4 applyToneMapping(vec4 color)
 }
 #endif
 
-void get_texture_flags()
-{
-	vec4 flags = texture2D(textureFlags, vec2(0.0, 0.0));
-	if (flags.r > 0.5) {
-		normalTexturePresent = true;
-	}
-	if (flags.g > 0.5) {
-		texTileableHorizontal = true;
-	}
-	if (flags.b > 0.5) {
-		texTileableVertical = true;
-	}
-	if (texTileableHorizontal && texTileableVertical) {
-		texSeamless = true;
-	}
-}
-
-float intensity(vec3 color)
-{
-	return (color.r + color.g + color.b) / 3.0;
-}
-
-float get_rgb_height(vec2 uv)
-{
-	if (texSeamless) {
-		return intensity(texture2D(baseTexture, uv).rgb);
-	} else {
-		return intensity(texture2D(baseTexture, clamp(uv, 0.0, 0.999)).rgb);
-	}
-}
-
-vec4 get_normal_map(vec2 uv)
-{
-	vec4 bump = texture2D(normalTexture, uv).rgba;
-	bump.xyz = normalize(bump.xyz * 2.0 - 1.0);
-	return bump;
-}
-
 void main(void)
 {
 	vec3 color;
-	vec4 bump;
-	vec2 uv = gl_TexCoord[0].st;
-	bool use_normalmap = false;
-	get_texture_flags();
-
-#if USE_NORMALMAPS == 1
-	if (normalTexturePresent) {
-		bump = get_normal_map(uv);
-		use_normalmap = true;
-	}
-#endif
-
-#if GENERATE_NORMALMAPS == 1
-	if (normalTexturePresent == false) {
-		float tl = get_rgb_height(vec2(uv.x - SAMPLE_STEP, uv.y + SAMPLE_STEP));
-		float t  = get_rgb_height(vec2(uv.x - SAMPLE_STEP, uv.y - SAMPLE_STEP));
-		float tr = get_rgb_height(vec2(uv.x + SAMPLE_STEP, uv.y + SAMPLE_STEP));
-		float r  = get_rgb_height(vec2(uv.x + SAMPLE_STEP, uv.y));
-		float br = get_rgb_height(vec2(uv.x + SAMPLE_STEP, uv.y - SAMPLE_STEP));
-		float b  = get_rgb_height(vec2(uv.x, uv.y - SAMPLE_STEP));
-		float bl = get_rgb_height(vec2(uv.x -SAMPLE_STEP, uv.y - SAMPLE_STEP));
-		float l  = get_rgb_height(vec2(uv.x - SAMPLE_STEP, uv.y));
-		float dX = (tr + 2.0 * r + br) - (tl + 2.0 * l + bl);
-		float dY = (bl + 2.0 * b + br) - (tl + 2.0 * t + tr);
-		bump = vec4(normalize(vec3 (dX, dY, NORMALMAPS_STRENGTH)), 1.0);
-		use_normalmap = true;
-	}
-#endif
+	vec2 uv = varTexCoord.st;
 
 	vec4 base = texture2D(baseTexture, uv).rgba;
 
-#ifdef ENABLE_BUMPMAPPING
-	if (use_normalmap) {
-		vec3 L = normalize(lightVec);
-		vec3 E = normalize(eyeVec);
-		float specular = pow(clamp(dot(reflect(L, bump.xyz), E), 0.0, 1.0), 1.0);
-		float diffuse = dot(-E,bump.xyz);
-		color = (diffuse + 0.1 * specular) * base.rgb;
-	} else {
-		color = base.rgb;
+#ifdef USE_DISCARD
+	// If alpha is zero, we can just discard the pixel. This fixes transparency
+	// on GPUs like GC7000L, where GL_ALPHA_TEST is not implemented in mesa,
+	// and also on GLES 2, where GL_ALPHA_TEST is missing entirely.
+	if (base.a == 0.0) {
+		discard;
 	}
-#else
-	color = base.rgb;
 #endif
 
+	color = base.rgb;
+
 	vec4 col = vec4(color.rgb, base.a);
 
-	col.rgb *= gl_Color.rgb;
+	col.rgb *= varColor.rgb;
 
 	col.rgb *= emissiveColor.rgb * vIDiff;
 
-#ifdef ENABLE_TONE_MAPPING
+#if ENABLE_TONE_MAPPING
 	col = applyToneMapping(col);
 #endif
 
diff --git a/client/shaders/object_shader/opengl_vertex.glsl b/client/shaders/object_shader/opengl_vertex.glsl
index 968a07e22..b4a4d0aaa 100644
--- a/client/shaders/object_shader/opengl_vertex.glsl
+++ b/client/shaders/object_shader/opengl_vertex.glsl
@@ -1,4 +1,3 @@
-uniform mat4 mWorldViewProj;
 uniform mat4 mWorld;
 
 uniform vec3 eyePosition;
@@ -7,9 +6,14 @@ uniform float animationTimer;
 varying vec3 vNormal;
 varying vec3 vPosition;
 varying vec3 worldPosition;
+varying lowp vec4 varColor;
+#ifdef GL_ES
+varying mediump vec2 varTexCoord;
+#else
+centroid varying vec2 varTexCoord;
+#endif
 
 varying vec3 eyeVec;
-varying vec3 lightVec;
 varying float vIDiff;
 
 const float e = 2.718281828459;
@@ -19,35 +23,31 @@ float directional_ambient(vec3 normal)
 {
 	vec3 v = normal * normal;
 
-	if (normal.y < 0)
-		return dot(v, vec3(0.670820f, 0.447213f, 0.836660f));
+	if (normal.y < 0.0)
+		return dot(v, vec3(0.670820, 0.447213, 0.836660));
 
-	return dot(v, vec3(0.670820f, 1.000000f, 0.836660f));
+	return dot(v, vec3(0.670820, 1.000000, 0.836660));
 }
 
 void main(void)
 {
-	gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
-	gl_Position = mWorldViewProj * gl_Vertex;
+	varTexCoord = (mTexture * inTexCoord0).st;
+	gl_Position = mWorldViewProj * inVertexPosition;
 
 	vPosition = gl_Position.xyz;
-	vNormal = gl_Normal;
-	worldPosition = (mWorld * gl_Vertex).xyz;
-
-	vec3 sunPosition = vec3 (0.0, eyePosition.y * BS + 900.0, 0.0);
-
-	lightVec = sunPosition - worldPosition;
-	eyeVec = -(gl_ModelViewMatrix * gl_Vertex).xyz;
+	vNormal = inVertexNormal;
+	worldPosition = (mWorld * inVertexPosition).xyz;
+	eyeVec = -(mWorldView * inVertexPosition).xyz;
 
 #if (MATERIAL_TYPE == TILE_MATERIAL_PLAIN) || (MATERIAL_TYPE == TILE_MATERIAL_PLAIN_ALPHA)
 	vIDiff = 1.0;
 #else
 	// This is intentional comparison with zero without any margin.
 	// If normal is not equal to zero exactly, then we assume it's a valid, just not normalized vector
-	vIDiff = length(gl_Normal) == 0.0
+	vIDiff = length(inVertexNormal) == 0.0
 		? 1.0
-		: directional_ambient(normalize(gl_Normal));
+		: directional_ambient(normalize(inVertexNormal));
 #endif
 
-	gl_FrontColor = gl_BackColor = gl_Color;
+	varColor = inVertexColor;
 }
diff --git a/client/shaders/selection_shader/opengl_fragment.glsl b/client/shaders/selection_shader/opengl_fragment.glsl
index c679d0e12..35b1f8902 100644
--- a/client/shaders/selection_shader/opengl_fragment.glsl
+++ b/client/shaders/selection_shader/opengl_fragment.glsl
@@ -1,9 +1,12 @@
 uniform sampler2D baseTexture;
 
+varying lowp vec4 varColor;
+varying mediump vec2 varTexCoord;
+
 void main(void)
 {
-	vec2 uv = gl_TexCoord[0].st;
+	vec2 uv = varTexCoord.st;
 	vec4 color = texture2D(baseTexture, uv);
-	color.rgb *= gl_Color.rgb;
+	color.rgb *= varColor.rgb;
 	gl_FragColor = color;
 }
diff --git a/client/shaders/selection_shader/opengl_vertex.glsl b/client/shaders/selection_shader/opengl_vertex.glsl
index d0b16c8b0..9ca87a9cf 100644
--- a/client/shaders/selection_shader/opengl_vertex.glsl
+++ b/client/shaders/selection_shader/opengl_vertex.glsl
@@ -1,9 +1,10 @@
-uniform mat4 mWorldViewProj;
+varying lowp vec4 varColor;
+varying mediump vec2 varTexCoord;
 
 void main(void)
 {
-	gl_TexCoord[0] = gl_MultiTexCoord0;
-	gl_Position = mWorldViewProj * gl_Vertex;
+	varTexCoord = inTexCoord0.st;
+	gl_Position = mWorldViewProj * inVertexPosition;
 
-	gl_FrontColor = gl_BackColor = gl_Color;
+	varColor = inVertexColor;
 }
diff --git a/client/shaders/stars_shader/opengl_fragment.glsl b/client/shaders/stars_shader/opengl_fragment.glsl
new file mode 100644
index 000000000..a9ed741bf
--- /dev/null
+++ b/client/shaders/stars_shader/opengl_fragment.glsl
@@ -0,0 +1,6 @@
+uniform vec4 starColor;
+
+void main(void)
+{
+	gl_FragColor = starColor;
+}
diff --git a/client/shaders/stars_shader/opengl_vertex.glsl b/client/shaders/stars_shader/opengl_vertex.glsl
new file mode 100644
index 000000000..77c401f34
--- /dev/null
+++ b/client/shaders/stars_shader/opengl_vertex.glsl
@@ -0,0 +1,4 @@
+void main(void)
+{
+	gl_Position = mWorldViewProj * inVertexPosition;
+}