diff options
Diffstat (limited to 'js/helper-classes/RDGE/src/core/script/fx/ssao.js')
| -rw-r--r-- | js/helper-classes/RDGE/src/core/script/fx/ssao.js | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/js/helper-classes/RDGE/src/core/script/fx/ssao.js b/js/helper-classes/RDGE/src/core/script/fx/ssao.js new file mode 100644 index 00000000..05793594 --- /dev/null +++ b/js/helper-classes/RDGE/src/core/script/fx/ssao.js | |||
| @@ -0,0 +1,116 @@ | |||
| 1 | /* <copyright> | ||
| 2 | This file contains proprietary software owned by Motorola Mobility, Inc.<br/> | ||
| 3 | No rights, expressed or implied, whatsoever to this software are provided by Motorola Mobility, Inc. hereunder.<br/> | ||
| 4 | (c) Copyright 2011 Motorola Mobility, Inc. All Rights Reserved. | ||
| 5 | </copyright> */ | ||
| 6 | |||
| 7 | |||
| 8 | /** | ||
| 9 | * Implements SSAO. | ||
| 10 | * See http://www.gamedev.net/page/resources/_/reference/programming/140/lighting-and-shading/a-simple-and-practical-approach-to-ssao-r2753 | ||
| 11 | * @param v2ScreenSize - size of the viewport in window coordinates | ||
| 12 | */ | ||
| 13 | function fxSSAO(enHRDepth) | ||
| 14 | { | ||
| 15 | function renderInitSSAO(quad) | ||
| 16 | { | ||
| 17 | quad.shader = createShader(gl, 'ssao_vshader', enHRDepth ? 'ssaohr_fshader' : 'ssao_fshader', [ "vert", "texcoord"]); | ||
| 18 | quad.renderObj = new RenderObject(quad.shader); | ||
| 19 | |||
| 20 | var quadBuf = getScreenAlignedQuad(); | ||
| 21 | quad.vertBuffer = quadBuf.vertexObject; | ||
| 22 | quad.uvBuffer = quadBuf.texCoordObject; | ||
| 23 | |||
| 24 | quad.renderObj.addTexture("sColMap", 0, UNIFORMTYPE.TEXTURE2D); | ||
| 25 | quad.renderObj.addTexture("sNormDepthMap", 1, UNIFORMTYPE.TEXTURE2D); | ||
| 26 | quad.renderObj.addTexture("sRandMap", 2, UNIFORMTYPE.TEXTURE2D); | ||
| 27 | if (enHRDepth) | ||
| 28 | quad.renderObj.addTexture("sHRDepthMap", 3, UNIFORMTYPE.TEXTURE2D); | ||
| 29 | |||
| 30 | quad.renderObj.addBuffers(quad.vertBuffer, gl.ARRAY_BUFFER, 3, 0, gl.FLOAT); | ||
| 31 | quad.renderObj.addBuffers(quad.uvBuffer, gl.ARRAY_BUFFER, 2, 2, gl.FLOAT); | ||
| 32 | } | ||
| 33 | |||
| 34 | // Load random normal texture | ||
| 35 | this.randTexture = createTexture(gl, "assets/images/random_normal.png"); | ||
| 36 | gl.bindTexture(gl.TEXTURE_2D, this.randTexture); | ||
| 37 | gl.texParameteri(gl.TEXTURE_2D,gl.TEXTURE_MIN_FILTER,gl.LINEAR); | ||
| 38 | gl.texParameteri(gl.TEXTURE_2D,gl.TEXTURE_WRAP_S,gl.REPEAT); | ||
| 39 | gl.texParameteri(gl.TEXTURE_2D,gl.TEXTURE_WRAP_T,gl.REPEAT); | ||
| 40 | |||
| 41 | // Whether or not to use a high res depth texture | ||
| 42 | this.enHRDepth = enHRDepth; | ||
| 43 | |||
| 44 | // Quad for full screen pass | ||
| 45 | this.ssaoQuad = new ScreenQuad(null); | ||
| 46 | this.ssaoQuad.initialize(renderInitSSAO); | ||
| 47 | |||
| 48 | // Set up uniforms | ||
| 49 | var activeCam = g_cameraManager.getActiveCamera(); | ||
| 50 | this.v3FrustumFLT = activeCam.getFTR(); | ||
| 51 | this.ssaoQuad.renderObj.addUniform("u_frustumFLT", this.v3FrustumFLT, UNIFORMTYPE.FLOAT3); | ||
| 52 | |||
| 53 | this.v4ArtVals = [1.0, 1.0, 1.0, 1.0]; | ||
| 54 | this.ssaoQuad.renderObj.addUniform("u_artVals", this.v4ArtVals, UNIFORMTYPE.FLOAT4); | ||
| 55 | |||
| 56 | this.fRandMapSize = 64.0; | ||
| 57 | this.ssaoQuad.renderObj.addUniform("u_randMapSize", this.fRandMapSize, UNIFORMTYPE.FLOAT); | ||
| 58 | |||
| 59 | this.v2ScreenSize = [1024, 1024]; | ||
| 60 | this.ssaoQuad.renderObj.addUniform("u_screenSize", this.v2ScreenSize, UNIFORMTYPE.FLOAT2); | ||
| 61 | } | ||
| 62 | |||
| 63 | /** | ||
| 64 | * Contributes SSAO to the passed offscreen surface, rendering to another surface. | ||
| 65 | * See http://www.gamedev.net/page/resources/_/reference/programming/140/lighting-and-shading/a-simple-and-practical-approach-to-ssao-r2753 | ||
| 66 | * @param srcTexColor - color surface of rendered scene | ||
| 67 | * @param srcTexNormDepth - screenspace normal+depth surface for scene; {nx, ny, nz, depth} | ||
| 68 | * @param dstRenderTarget - where to put the result of SSAO | ||
| 69 | * @param sampleRadius - | ||
| 70 | * @param intensity - | ||
| 71 | * @param distScale - | ||
| 72 | * @param bias - | ||
| 73 | */ | ||
| 74 | fxSSAO.prototype.doSSAO = function(srcTexColor, srcTexNormDepth, srcTexHRDepth, dstRenderTarget, sampleRadius, intensity, distScale, bias) | ||
| 75 | { | ||
| 76 | // Set art params and other uniforms | ||
| 77 | this.v4ArtVals[0] = sampleRadius; | ||
| 78 | this.v4ArtVals[1] = intensity; | ||
| 79 | this.v4ArtVals[2] = distScale; | ||
| 80 | this.v4ArtVals[3] = bias; | ||
| 81 | |||
| 82 | this.v2ScreenSize[0] = dstRenderTarget ? dstRenderTarget.frameBuffer.width : g_width; | ||
| 83 | this.v2ScreenSize[1] = dstRenderTarget ? dstRenderTarget.frameBuffer.height : g_height; | ||
| 84 | |||
| 85 | // Do ssao | ||
| 86 | gl.bindFramebuffer(gl.FRAMEBUFFER, dstRenderTarget ? dstRenderTarget.frameBuffer : null); | ||
| 87 | // gl.viewport(0, 0, 99999, 99999); | ||
| 88 | gl.clear(gl.COLOR_BUFFER_BIT); | ||
| 89 | |||
| 90 | gl.disable(gl.DEPTH_TEST); | ||
| 91 | |||
| 92 | gl.useProgram(this.ssaoQuad.shader); | ||
| 93 | |||
| 94 | this.ssaoQuad.renderObj.bindBuffers(); | ||
| 95 | this.ssaoQuad.renderObj.bindTextures(); | ||
| 96 | this.ssaoQuad.renderObj.bindUniforms(); | ||
| 97 | |||
| 98 | gl.activeTexture(gl.TEXTURE0); | ||
| 99 | gl.bindTexture(gl.TEXTURE_2D, srcTexColor); | ||
| 100 | gl.activeTexture(gl.TEXTURE1); | ||
| 101 | gl.bindTexture(gl.TEXTURE_2D, srcTexNormDepth); | ||
| 102 | gl.activeTexture(gl.TEXTURE2); | ||
| 103 | gl.bindTexture(gl.TEXTURE_2D, this.randTexture); | ||
| 104 | if (this.enHRDepth) { | ||
| 105 | gl.activeTexture(gl.TEXTURE3); | ||
| 106 | gl.bindTexture(gl.TEXTURE_2D, srcTexHRDepth); | ||
| 107 | } | ||
| 108 | gl.activeTexture(gl.TEXTURE0); | ||
| 109 | |||
| 110 | gl.drawArrays(gl.TRIANGLES, 0, 6); | ||
| 111 | |||
| 112 | gl.enable(gl.DEPTH_TEST); | ||
| 113 | gl.useProgram(null); | ||
| 114 | |||
| 115 | return dstRenderTarget; | ||
| 116 | } | ||