first draft of sobel operator, use r_glsl_postprocess_uservec1 with an x value > 100

From: Wolfgang (Blub) Bumiller <blub@speed.at>

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@10115 d7cf8633-e32d-0410-b094-e92efae38249

diff --git a/gl_rmain.c b/gl_rmain.c
index d07ad154b1a354942a021373f11779bebfb6e8fe..120ee2e9082ae99c5a96dc5bea3fbc5e8f97b3c7 100644 (file)
--- a/gl_rmain.c
+++ b/gl_rmain.c
@@ -693,12 +693,44 @@ static const char *builtinshaderstring =
 "#ifdef USEPOSTPROCESSING\n"
 "// do r_glsl_dumpshader, edit glsl/default.glsl, and replace this by your own postprocessing if you want\n"
 "// this code does a blur with the radius specified in the first component of r_glsl_postprocess_uservec1 and blends it using the second component\n"
+"      if (UserVec1.x > 100.0) {\n"
+"              // vec2 ts = textureSize(Texture_First, 0);\n"
+"              // vec2 px = vec2(1/ts.x, 1/ts.y);\n"
+"              vec2 px = PixelSize;\n"
+"              vec4 x1 = texture2D(Texture_First, TexCoord1 + vec2(-px.x, px.y));\n"
+"              vec4 x2 = texture2D(Texture_First, TexCoord1 + vec2(-px.x,  0.0));\n"
+"              vec4 x3 = texture2D(Texture_First, TexCoord1 + vec2(-px.x,-px.y));\n"
+"              vec4 x4 = texture2D(Texture_First, TexCoord1 + vec2( px.x, px.y));\n"
+"              vec4 x5 = texture2D(Texture_First, TexCoord1 + vec2( px.x,  0.0));\n"
+"              vec4 x6 = texture2D(Texture_First, TexCoord1 + vec2( px.x,-px.y));\n"
+"              vec4 y1 = texture2D(Texture_First, TexCoord1 + vec2( px.x,-px.y));\n"
+"              vec4 y2 = texture2D(Texture_First, TexCoord1 + vec2(  0.0,-px.y));\n"
+"              vec4 y3 = texture2D(Texture_First, TexCoord1 + vec2(-px.x,-px.y));\n"
+"              vec4 y4 = texture2D(Texture_First, TexCoord1 + vec2( px.x, px.y));\n"
+"              vec4 y5 = texture2D(Texture_First, TexCoord1 + vec2(  0.0, px.y));\n"
+"              vec4 y6 = texture2D(Texture_First, TexCoord1 + vec2(-px.x, px.y));\n"
+""
+"              float px1 = -1.0 * (0.30*x1.r + 0.59*x1.g + 0.11*x1.b);\n"
+"              float px2 = -2.0 * (0.30*x2.r + 0.59*x2.g + 0.11*x2.b);\n"
+"              float px3 = -1.0 * (0.30*x3.r + 0.59*x3.g + 0.11*x3.b);\n"
+"              float px4 =  1.0 * (0.30*x4.r + 0.59*x4.g + 0.11*x4.b);\n"
+"              float px5 =  2.0 * (0.30*x5.r + 0.59*x5.g + 0.11*x5.b);\n"
+"              float px6 =  1.0 * (0.30*x6.r + 0.59*x6.g + 0.11*x6.b);\n"
+"              float py1 = -1.0 * (0.30*y1.r + 0.59*y1.g + 0.11*y1.b);\n"
+"              float py2 = -2.0 * (0.30*y2.r + 0.59*y2.g + 0.11*y2.b);\n"
+"              float py3 = -1.0 * (0.30*y3.r + 0.59*y3.g + 0.11*y3.b);\n"
+"              float py4 =  1.0 * (0.30*y4.r + 0.59*y4.g + 0.11*y4.b);\n"
+"              float py5 =  2.0 * (0.30*y5.r + 0.59*y5.g + 0.11*y5.b);\n"
+"              float py6 =  1.0 * (0.30*y6.r + 0.59*y6.g + 0.11*y6.b);\n"
+"              gl_FragColor = 0.25 * vec4(vec3(abs(px1 + px2 + px3 + px4 + px5 + px6)), 1) + 0.25 * vec4(vec3(abs(py1 + py2 + py3 + py4 + py5 + py6)), 1);\n"
+"      } else {\n"
 "      gl_FragColor += texture2D(Texture_First, TexCoord1 + PixelSize*UserVec1.x*vec2(-0.987688, -0.156434)) * UserVec1.y;\n"
 "      gl_FragColor += texture2D(Texture_First, TexCoord1 + PixelSize*UserVec1.x*vec2(-0.156434, -0.891007)) * UserVec1.y;\n"
 "      gl_FragColor += texture2D(Texture_First, TexCoord1 + PixelSize*UserVec1.x*vec2( 0.891007, -0.453990)) * UserVec1.y;\n"
 "      gl_FragColor += texture2D(Texture_First, TexCoord1 + PixelSize*UserVec1.x*vec2( 0.707107,  0.707107)) * UserVec1.y;\n"
 "      gl_FragColor += texture2D(Texture_First, TexCoord1 + PixelSize*UserVec1.x*vec2(-0.453990,  0.891007)) * UserVec1.y;\n"
 "      gl_FragColor /= (1 + 5 * UserVec1.y);\n"
+"      }\n"
 "#endif\n"
 "\n"
 "#ifdef USESATURATION\n"