1 files changed, 323 insertions, 0 deletions
diff --git a/drivers/gles2/shaders/tonemap.glsl b/drivers/gles2/shaders/tonemap.glsl
new file mode 100644
index 0000000000..2f671158b2
--- /dev/null
+++ b/drivers/gles2/shaders/tonemap.glsl
@@ -0,0 +1,323 @@
+[vertex]
+
+
+layout(location=0) in highp vec4 vertex_attrib;
+layout(location=4) in vec2 uv_in;
+
+out vec2 uv_interp;
+
+void main() {
+
+	gl_Position = vertex_attrib;
+	uv_interp = uv_in;
+#ifdef V_FLIP
+	uv_interp.y = 1.0-uv_interp.y;
+#endif
+
+}
+
+[fragment]
+
+#if !defined(GLES_OVER_GL)
+precision mediump float;
+#endif
+
+
+in vec2 uv_interp;
+
+uniform highp sampler2D source; //texunit:0
+
+uniform float exposure;
+uniform float white;
+
+#ifdef USE_AUTO_EXPOSURE
+
+uniform highp sampler2D source_auto_exposure; //texunit:1
+uniform highp float auto_exposure_grey;
+
+#endif
+
+#if defined(USE_GLOW_LEVEL1) || defined(USE_GLOW_LEVEL2) || defined(USE_GLOW_LEVEL3) || defined(USE_GLOW_LEVEL4) || defined(USE_GLOW_LEVEL5) || defined(USE_GLOW_LEVEL6) || defined(USE_GLOW_LEVEL7)
+
+uniform highp sampler2D source_glow; //texunit:2
+uniform highp float glow_intensity;
+
+#endif
+
+#ifdef USE_BCS
+
+uniform vec3 bcs;
+
+#endif
+
+#ifdef USE_COLOR_CORRECTION
+
+uniform sampler2D color_correction; //texunit:3
+
+#endif
+
+
+layout(location = 0) out vec4 frag_color;
+
+#ifdef USE_GLOW_FILTER_BICUBIC
+
+// w0, w1, w2, and w3 are the four cubic B-spline basis functions
+float w0(float a)
+{
+    return (1.0/6.0)*(a*(a*(-a + 3.0) - 3.0) + 1.0);
+}
+
+float w1(float a)
+{
+    return (1.0/6.0)*(a*a*(3.0*a - 6.0) + 4.0);
+}
+
+float w2(float a)
+{
+    return (1.0/6.0)*(a*(a*(-3.0*a + 3.0) + 3.0) + 1.0);
+}
+
+float w3(float a)
+{
+    return (1.0/6.0)*(a*a*a);
+}
+
+// g0 and g1 are the two amplitude functions
+float g0(float a)
+{
+    return w0(a) + w1(a);
+}
+
+float g1(float a)
+{
+    return w2(a) + w3(a);
+}
+
+// h0 and h1 are the two offset functions
+float h0(float a)
+{
+    return -1.0 + w1(a) / (w0(a) + w1(a));
+}
+
+float h1(float a)
+{
+    return 1.0 + w3(a) / (w2(a) + w3(a));
+}
+
+uniform ivec2 glow_texture_size;
+
+vec4 texture2D_bicubic(sampler2D tex, vec2 uv,int p_lod)
+{
+	float lod=float(p_lod);
+	vec2 tex_size = vec2(glow_texture_size >> p_lod);
+	vec2 pixel_size =1.0/tex_size;
+	uv = uv*tex_size + 0.5;
+	vec2 iuv = floor( uv );
+	vec2 fuv = fract( uv );
+
+	float g0x = g0(fuv.x);
+	float g1x = g1(fuv.x);
+	float h0x = h0(fuv.x);
+	float h1x = h1(fuv.x);
+	float h0y = h0(fuv.y);
+	float h1y = h1(fuv.y);
+
+	vec2 p0 = (vec2(iuv.x + h0x, iuv.y + h0y) - 0.5) * pixel_size;
+	vec2 p1 = (vec2(iuv.x + h1x, iuv.y + h0y) - 0.5) * pixel_size;
+	vec2 p2 = (vec2(iuv.x + h0x, iuv.y + h1y) - 0.5) * pixel_size;
+	vec2 p3 = (vec2(iuv.x + h1x, iuv.y + h1y) - 0.5) * pixel_size;
+
+	return g0(fuv.y) * (g0x * textureLod(tex, p0,lod)  +
+			    g1x * textureLod(tex, p1,lod)) +
+			g1(fuv.y) * (g0x * textureLod(tex, p2,lod)  +
+				     g1x * textureLod(tex, p3,lod));
+}
+
+
+
+#define GLOW_TEXTURE_SAMPLE(m_tex,m_uv,m_lod) texture2D_bicubic(m_tex,m_uv,m_lod)
+
+#else
+
+#define GLOW_TEXTURE_SAMPLE(m_tex,m_uv,m_lod) textureLod(m_tex,m_uv,float(m_lod))
+
+#endif
+
+
+vec3 tonemap_filmic(vec3 color,float white) {
+
+	float A = 0.15;
+	float B = 0.50;
+	float C = 0.10;
+	float D = 0.20;
+	float E = 0.02;
+	float F = 0.30;
+	float W = 11.2;
+
+	vec3 coltn = ((color*(A*color+C*B)+D*E)/(color*(A*color+B)+D*F))-E/F;
+	float whitetn = ((white*(A*white+C*B)+D*E)/(white*(A*white+B)+D*F))-E/F;
+
+	return coltn/whitetn;
+
+}
+
+vec3 tonemap_aces(vec3 color) {
+	float a = 2.51f;
+	float b = 0.03f;
+	float c = 2.43f;
+	float d = 0.59f;
+	float e = 0.14f;
+	return color = clamp((color*(a*color+b))/(color*(c*color+d)+e),vec3(0.0),vec3(1.0));
+}
+
+vec3 tonemap_reindhart(vec3 color,float white) {
+
+	return ( color * ( 1.0 + ( color / ( white) ) ) ) / ( 1.0 + color );
+}
+
+void main() {
+
+	vec4 color = textureLod(source, uv_interp, 0.0);
+
+#ifdef USE_AUTO_EXPOSURE
+
+	color/=texelFetch(source_auto_exposure,ivec2(0,0),0).r/auto_exposure_grey;
+#endif
+
+	color*=exposure;
+
+#if defined(USE_GLOW_LEVEL1) || defined(USE_GLOW_LEVEL2) || defined(USE_GLOW_LEVEL3) || defined(USE_GLOW_LEVEL4) || defined(USE_GLOW_LEVEL5) || defined(USE_GLOW_LEVEL6) || defined(USE_GLOW_LEVEL7)
+#define USING_GLOW
+#endif
+
+#if defined(USING_GLOW)
+	vec3 glow = vec3(0.0);
+
+#ifdef USE_GLOW_LEVEL1
+
+	glow+=GLOW_TEXTURE_SAMPLE(source_glow,uv_interp,1).rgb;
+#endif
+
+#ifdef USE_GLOW_LEVEL2
+	glow+=GLOW_TEXTURE_SAMPLE(source_glow,uv_interp,2).rgb;
+#endif
+
+#ifdef USE_GLOW_LEVEL3
+	glow+=GLOW_TEXTURE_SAMPLE(source_glow,uv_interp,3).rgb;
+#endif
+
+#ifdef USE_GLOW_LEVEL4
+	glow+=GLOW_TEXTURE_SAMPLE(source_glow,uv_interp,4).rgb;
+#endif
+
+#ifdef USE_GLOW_LEVEL5
+	glow+=GLOW_TEXTURE_SAMPLE(source_glow,uv_interp,5).rgb;
+#endif
+
+#ifdef USE_GLOW_LEVEL6
+	glow+=GLOW_TEXTURE_SAMPLE(source_glow,uv_interp,6).rgb;
+#endif
+
+#ifdef USE_GLOW_LEVEL7
+	glow+=GLOW_TEXTURE_SAMPLE(source_glow,uv_interp,7).rgb;
+#endif
+
+
+	glow *= glow_intensity;
+
+#endif
+
+
+#ifdef USE_REINDHART_TONEMAPPER
+
+	color.rgb = tonemap_reindhart(color.rgb,white);
+
+# if defined(USING_GLOW)
+	glow = tonemap_reindhart(glow,white);
+# endif
+
+#endif
+
+#ifdef USE_FILMIC_TONEMAPPER
+
+	color.rgb = tonemap_filmic(color.rgb,white);
+
+# if defined(USING_GLOW)
+	glow = tonemap_filmic(glow,white);
+# endif
+
+#endif
+
+#ifdef USE_ACES_TONEMAPPER
+
+	color.rgb = tonemap_aces(color.rgb);
+
+# if defined(USING_GLOW)
+	glow = tonemap_aces(glow);
+# endif
+
+#endif
+
+	//regular Linear -> SRGB conversion
+	vec3 a = vec3(0.055);
+	color.rgb = mix( (vec3(1.0)+a)*pow(color.rgb,vec3(1.0/2.4))-a , 12.92*color.rgb , lessThan(color.rgb,vec3(0.0031308)));
+
+#if defined(USING_GLOW)
+	glow = mix( (vec3(1.0)+a)*pow(glow,vec3(1.0/2.4))-a , 12.92*glow , lessThan(glow,vec3(0.0031308)));
+#endif
+
+//glow needs to be added in SRGB space (together with image space effects)
+
+	color.rgb = clamp(color.rgb,0.0,1.0);
+
+#if defined(USING_GLOW)
+	glow = clamp(glow,0.0,1.0);
+#endif
+
+#ifdef USE_GLOW_REPLACE
+
+	color.rgb = glow;
+
+#endif
+
+#ifdef USE_GLOW_SCREEN
+
+	color.rgb = max((color.rgb + glow) - (color.rgb * glow), vec3(0.0));
+
+#endif
+
+#ifdef USE_GLOW_SOFTLIGHT
+
+	{
+
+		glow = (glow * 0.5) + 0.5;
+		color.r =  (glow.r <= 0.5) ? (color.r - (1.0 - 2.0 * glow.r) * color.r * (1.0 - color.r)) : (((glow.r > 0.5) && (color.r <= 0.25)) ? (color.r + (2.0 * glow.r - 1.0) * (4.0 * color.r * (4.0 * color.r + 1.0) * (color.r - 1.0) + 7.0 * color.r)) : (color.r + (2.0 * glow.r - 1.0) * (sqrt(color.r) - color.r)));
+		color.g =  (glow.g <= 0.5) ? (color.g - (1.0 - 2.0 * glow.g) * color.g * (1.0 - color.g)) : (((glow.g > 0.5) && (color.g <= 0.25)) ? (color.g + (2.0 * glow.g - 1.0) * (4.0 * color.g * (4.0 * color.g + 1.0) * (color.g - 1.0) + 7.0 * color.g)) : (color.g + (2.0 * glow.g - 1.0) * (sqrt(color.g) - color.g)));
+		color.b =  (glow.b <= 0.5) ? (color.b - (1.0 - 2.0 * glow.b) * color.b * (1.0 - color.b)) : (((glow.b > 0.5) && (color.b <= 0.25)) ? (color.b + (2.0 * glow.b - 1.0) * (4.0 * color.b * (4.0 * color.b + 1.0) * (color.b - 1.0) + 7.0 * color.b)) : (color.b + (2.0 * glow.b - 1.0) * (sqrt(color.b) - color.b)));
+	}
+
+#endif
+
+#if defined(USING_GLOW) && !defined(USE_GLOW_SCREEN) && !defined(USE_GLOW_SOFTLIGHT) && !defined(USE_GLOW_REPLACE)
+	//additive
+	color.rgb+=glow;
+#endif
+
+#ifdef USE_BCS
+
+	color.rgb = mix(vec3(0.0),color.rgb,bcs.x);
+	color.rgb = mix(vec3(0.5),color.rgb,bcs.y);
+	color.rgb = mix(vec3(dot(vec3(1.0),color.rgb)*0.33333),color.rgb,bcs.z);
+
+#endif
+
+#ifdef USE_COLOR_CORRECTION
+
+	color.r = texture(color_correction,vec2(color.r,0.0)).r;
+	color.g = texture(color_correction,vec2(color.g,0.0)).g;
+	color.b = texture(color_correction,vec2(color.b,0.0)).b;
+#endif
+
+
+	frag_color=vec4(color.rgb,1.0);
+}