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Diffstat (limited to 'src/library_gl.js')
-rw-r--r--src/library_gl.js166
1 files changed, 150 insertions, 16 deletions
diff --git a/src/library_gl.js b/src/library_gl.js
index d7bf31ea..f5235a3f 100644
--- a/src/library_gl.js
+++ b/src/library_gl.js
@@ -316,6 +316,10 @@ var LibraryGL = {
Module.ctx.texSubImage2D(target, level, xoffset, yoffset, width, height, format, type, pixels);
},
+ glReadPixels: function(x, y, width, height, format, type, pixels) {
+ Module.ctx.readPixels(x, y, width, height, format, type, HEAPU8.subarray(pixels));
+ },
+
glBindTexture: function(target, texture) {
Module.ctx.bindTexture(target, GL.textures[texture]);
},
@@ -963,6 +967,11 @@ var LibraryGL = {
return 1 /* GL_TRUE */;
},
+ glEnable: function(cap) {
+ if (cap == 0x0DE1) return; // no GL_TEXTURE_2D in GLES or WebGL
+ Module.ctx.enable(cap);
+ },
+
// GL emulation: provides misc. functionality not present in OpenGL ES 2.0 or WebGL
$GLEmulation__deps: ['glCreateShader', 'glShaderSource', 'glCompileShader', 'glCreateProgram', 'glDeleteShader', 'glDeleteProgram', 'glAttachShader', 'glActiveTexture', 'glGetShaderiv', 'glGetProgramiv', 'glLinkProgram'],
@@ -1017,20 +1026,140 @@ var LibraryGL = {
}
},
- glBegin__deps: ['$GL', function() { return 'GL.matrix.lib = ' + read('gl-matrix.js') + ';\n' +
- 'GL.initMatrixLibrary();'
- }],
- glBegin: function() {
- Module.print('TODO');
- }
+ // Immediate mode
+
+ $GLImmediate: {
+ maxElements: 1024,
+ vertexData: null,
+ indexData: null,
+ vertexCounter: 0,
+ indexCounter: 0,
+ mode: 0,
+
+ initted: false,
+ init: function() {
+ this.vertexShader = Module.ctx.createShader(Module.ctx.VERTEX_SHADER);
+ Module.ctx.shaderSource(this.vertexShader, 'attribute vec4 a_position; \n\
+ attribute vec2 a_texCoord; \n\
+ varying vec2 v_texCoord; \n\
+ void main() \n\
+ { \n\
+ gl_Position = a_position; \n\
+ v_texCoord = a_texCoord; \n\
+ } \n');
+ Module.ctx.compileShader(this.vertexShader);
+
+ this.fragmentShader = Module.ctx.createShader(Module.ctx.FRAGMENT_SHADER);
+ Module.ctx.shaderSource(this.fragmentShader, 'precision mediump float; \n\
+ varying vec2 v_texCoord; \n\
+ uniform sampler2D s_texture; \n\
+ void main() \n\
+ { \n\
+ gl_FragColor = texture2D( s_texture, v_texCoord );\n\
+ } \n');
+ Module.ctx.compileShader(this.fragmentShader);
+
+ this.program = Module.ctx.createProgram();
+ Module.ctx.attachShader(this.program, this.vertexShader);
+ Module.ctx.attachShader(this.program, this.fragmentShader);
+ Module.ctx.linkProgram(this.program);
+
+ this.positionLocation = Module.ctx.getAttribLocation(this.program, 'a_position');
+ this.texCoordLocation = Module.ctx.getAttribLocation(this.program, 'a_texCoord');
+ this.textureLocation = Module.ctx.getUniformLocation(this.program, 's_texture');
+
+ // Buffer for data
+ this.vertexData = new Float32Array(5 * this.maxElements);
+ this.indexData = new Uint16Array(this.maxElements);
+
+ this.vertexObject = Module.ctx.createBuffer();
+ this.indexObject = Module.ctx.createBuffer();
+ },
+ flush: function() {
+ // Upload the data
+ Module.ctx.bindBuffer(Module.ctx.ARRAY_BUFFER, this.vertexObject);
+ Module.ctx.bufferData(Module.ctx.ARRAY_BUFFER, this.vertexData.subarray(0, 5*this.vertexCounter), Module.ctx.STATIC_DRAW);
+ Module.ctx.bindBuffer(Module.ctx.ELEMENT_ARRAY_BUFFER, this.indexObject);
+ Module.ctx.bufferData(Module.ctx.ELEMENT_ARRAY_BUFFER, this.indexData.subarray(0, this.indexCounter), Module.ctx.STATIC_DRAW);
+
+ // Render
+ //Module.ctx.viewport(0, 0, Module.canvas.width, Module.canvas.height);
+ //Module.ctx.clear(Module.ctx.COLOR_BUFFER_BIT);
+
+ Module.ctx.useProgram(this.program);
+
+ Module.ctx.bindBuffer(Module.ctx.ARRAY_BUFFER, this.vertexObject);
+ Module.ctx.vertexAttribPointer(this.positionLocation, 3, Module.ctx.FLOAT,
+ false, 5 * 4, 0);
+ Module.ctx.vertexAttribPointer(this.texCoordLocation, 2, Module.ctx.FLOAT,
+ false, 5 * 4,
+ 3 * 4);
+
+ Module.ctx.enableVertexAttribArray(this.positionLoc);
+ Module.ctx.enableVertexAttribArray(this.texCoordLoc);
+
+ Module.ctx.activeTexture(Module.ctx.TEXTURE0);
+ Module.ctx.bindTexture(Module.ctx.TEXTURE_2D, this.textureId);
+
+ Module.ctx.uniform1i(this.textureLocation, 0);
+
+ Module.ctx.bindBuffer(Module.ctx.ELEMENT_ARRAY_BUFFER, this.indexObject);
+ Module.ctx.drawElements(Module.ctx.TRIANGLES, this.indexCounter, Module.ctx.UNSIGNED_SHORT, 0);
+
+ this.vertexCounter = this.indexCounter = 0;
+ }
+ },
+
+ glBegin__deps: ['$GL', '$GLImmediate', function() { return 'GL.matrix.lib = ' + read('gl-matrix.js') +
+ ';\nGL.immediate = GLImmediate;\nGL.initMatrixLibrary();\n' }],
+ glBegin: function(mode) {
+ if (!GL.immediate.initted) GL.immediate.init();
+ GL.immediate.mode = mode;
+ },
+
+ glEnd: function() {
+ GL.immediate.flush();
+ },
+
+ glVertex3f: function(x, y, z) {
+ GL.immediate.vertexData[5*GL.immediate.vertexCounter ] = x;
+ GL.immediate.vertexData[5*GL.immediate.vertexCounter+1] = y;
+ GL.immediate.vertexData[5*GL.immediate.vertexCounter+2] = z;
+ GL.immediate.vertexCounter++;
+#if ASSERTIONS
+ assert(GL.immediate.vertexCounter < GL.immediate.maxElements, 'too many immediate mode vertexes');
+#endif
+ if (GL.immediate.mode == 7) { // GL_QUADS
+ if (GL.immediate.vertexCounter % 4 == 0) {
+ var start = GL.immediate.vertexCounter % 4;
+ GL.immediate.indexData[GL.immediate.indexCounter ] = start;
+ GL.immediate.indexData[GL.immediate.indexCounter+1] = start+1;
+ GL.immediate.indexData[GL.immediate.indexCounter+2] = start+2;
+ GL.immediate.indexData[GL.immediate.indexCounter+3] = start;
+ GL.immediate.indexData[GL.immediate.indexCounter+4] = start+2;
+ GL.immediate.indexData[GL.immediate.indexCounter+5] = start+3;
+ GL.immediate.indexCounter += 6;
+ }
+ } else {
+ throw 'only GL_QUADS supported so far';
+ }
+#if ASSERTIONS
+ assert(GL.immediate.indexCounter < GL.immediate.maxElements, 'too many immediate mode indexes');
+#endif
+ },
+
+ glTexCoord2i: function(u, v) {
+ GL.immediate.vertexData[5*GL.immediate.vertexCounter+3] = u;
+ GL.immediate.vertexData[5*GL.immediate.vertexCounter+4] = v;
+ },
};
-// Simple pass-through functions. Starred ones have return values.
+// Simple pass-through functions. Starred ones have return values. [X] ones have X in the C name but not in the JS name
[[0, 'shadeModel fogi fogfv getError finish flush'],
- [1, 'clearDepth depthFunc enable disable frontFace cullFace clear enableVertexAttribArray disableVertexAttribArray lineWidth clearStencil depthMask stencilMask stencilMaskSeparate checkFramebufferStatus* generateMipmap activeTexture blendEquation'],
- [2, 'pixelStorei blendFunc blendEquationSeparate'],
- [3, 'texParameteri texParameterf drawArrays vertexAttrib2f'],
- [4, 'viewport clearColor scissor vertexAttrib3f colorMask drawElements renderbufferStorage blendFuncSeparate'],
+ [1, 'clearDepth clearDepth[f] depthFunc disable frontFace cullFace clear enableVertexAttribArray disableVertexAttribArray lineWidth clearStencil depthMask stencilMask stencilMaskSeparate checkFramebufferStatus* generateMipmap activeTexture blendEquation polygonOffset hint sampleCoverage'],
+ [2, 'pixelStorei blendFunc blendEquationSeparate depthRange depthRange[f]'],
+ [3, 'texParameteri texParameterf drawArrays vertexAttrib2f stencilFunc stencilOp'],
+ [4, 'viewport clearColor scissor vertexAttrib3f colorMask drawElements renderbufferStorage blendFuncSeparate blendColor'],
[5, 'vertexAttrib4f'],
[6, 'vertexAttribPointer'],
[8, 'copyTexImage2D copyTexSubImage2D']].forEach(function(data) {
@@ -1039,15 +1168,20 @@ var LibraryGL = {
var args = range(num).map(function(i) { return 'x' + i }).join(', ');
var plainStub = '(function(' + args + ') { ' + (num > 0 ? 'Module.ctx.NAME(' + args + ')' : '') + ' })';
var returnStub = '(function(' + args + ') { ' + (num > 0 ? 'return Module.ctx.NAME(' + args + ')' : '') + ' })';
- names.split(' ').forEach(function(name_) {
+ names.split(' ').forEach(function(name) {
var stub = plainStub;
- if (name_[name_.length-1] == '*') {
- name_ = name_.substr(0, name_.length-1);
+ if (name[name.length-1] == '*') {
+ name = name.substr(0, name.length-1);
stub = returnStub;
}
- var cName = 'gl' + name_[0].toUpperCase() + name_.substr(1);
+ var cName = name;
+ if (name.indexOf('[') >= 0) {
+ cName = name.replace('[', '').replace(']', '');
+ name = cName.substr(0, cName.length-1);
+ }
+ var cName = 'gl' + cName[0].toUpperCase() + cName.substr(1);
assert(!(cName in LibraryGL), "Cannot reimplement the existing function " + cName);
- LibraryGL[cName] = eval(stub.replace('NAME', name_));
+ LibraryGL[cName] = eval(stub.replace('NAME', name));
});
});
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2025-07-23 19:18:31 +0000