2 files changed, 37 insertions, 107 deletions

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;
 }