diff options
| -rw-r--r-- | src/library_gl.js | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/library_gl.js b/src/library_gl.js index 507ac2ca..5f720842 100644 --- a/src/library_gl.js +++ b/src/library_gl.js @@ -892,6 +892,42 @@ var LibraryGL = { } glGetIntegerv(pname, params); }; + // Do some automatic rewriting to work around GLSL differences. Note that this must be done in + // tandem with the rest of the program, by itself it cannot suffice. + // Note that we need to remember shader types for this rewriting, saving sources makes it easier to debug. + GL.shaderTypes = {}; + GL.shaderSources = {}; + var glCreateShader = _glCreateShader; + _glCreateShader = function(shaderType) { + var id = glCreateShader(shaderType); + GL.shaderTypes[id] = shaderType; + return id; + }; + var glShaderSource = _glShaderSource; + _glShaderSource = function(shader, count, string, length) { + var source = GL.getSource(shader, count, string, length); + if (GL.shaderTypes[shader] == Module.ctx.VERTEX_SHADER) { + if (source.indexOf('ftransform()') >= 0) { + // Replace ftransform() with explicit project/modelview transforms, and add position and matrix info. + source = 'attribute vec3 a_position; \n\ + uniform mat4 u_modelView; \n\ + uniform mat4 u_projection; \n' + + source.replace('ftransform()', 'u_projection * u_modelView * vec4(a.position, 1.0)'); + } + } + GL.shaderSources[shader] = source; + Module.ctx.shaderSource(GL.shaders[shader], source); + }; + var glCompileShader = _glCompileShader; + _glCompileShader = function(shader) { + Module.ctx.compileShader(GL.shaders[shader]); + if (!Module.ctx.getShaderParameter(GL.shaders[shader], Module.ctx.COMPILE_STATUS)) { + console.log('Failed to compile shader: ' + Module.ctx.getShaderInfoLog(GL.shaders[shader])); + console.log('Type: ' + GL.shaderTypes[shader]); + console.log('Source: ' + GL.shaderSources[shader]); + throw 'Shader compilation halt'; + } + }; }, procReplacements: { |