384 lines
12 KiB
JavaScript
384 lines
12 KiB
JavaScript
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// see http://cgit.freedesktop.org/mesa/mesa/tree/src/mapi/glapi/gen/gl_API.xml
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var constants = Require('x11/core/ext/glxconstants');
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var MAX_SMALL_RENDER=65536-16;
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module.exports = function(GLX, ctx) {
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buffers = [];
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var currentLength = 0;
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function commandBuffer(opcode, len) {
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if (currentLength + len > MAX_SMALL_RENDER) {
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render();
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}
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if (len > MAX_SMALL_RENDER)
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throw Error('Buffer too big. Make sure you are using RenderLarge for large commands');
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currentLength += len;
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var res = Buffer(len);
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res.writeUInt16LE(len, 0);
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res.writeUInt16LE(opcode, 2);
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return res;
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}
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function serialize0(opcode) {
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buffers.push(commandBuffer(opcode, 4));
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}
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function serialize3fv(opcode, c1, c2, c3) {
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var res = commandBuffer(opcode, 16);
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res.writeFloatLE(c1, 4);
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res.writeFloatLE(c2, 8);
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res.writeFloatLE(c3, 12);
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buffers.push(res);
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}
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function serialize4fv(opcode, c1, c2, c3, c4) {
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var res = commandBuffer(opcode, 20);
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res.writeFloatLE(c1, 4);
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res.writeFloatLE(c2, 8);
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res.writeFloatLE(c3, 12);
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res.writeFloatLE(c4, 16);
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buffers.push(res);
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}
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function serialize4i(opcode, c1, c2, c3, c4) {
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var res = commandBuffer(opcode, 20);
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res.writeInt32LE(c1, 4);
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res.writeInt32LE(c2, 8);
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res.writeInt32LE(c3, 12);
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res.writeInt32LE(c4, 16);
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buffers.push(res);
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}
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function serialize6d(opcode, d1, d2, d3, d4, d5, d6)
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{
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var res = commandBuffer(opcode, 52);
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res.writeDoubleLE(d1, 4);
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res.writeDoubleLE(d2, 12);
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res.writeDoubleLE(d3, 20);
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res.writeDoubleLE(d4, 28);
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res.writeDoubleLE(d5, 36);
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res.writeDoubleLE(d6, 44);
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buffers.push(res);
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};
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function serialize2i(opcode, value1, value2) {
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var res = commandBuffer(opcode, 12);
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res.writeUInt32LE(value1, 4);
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res.writeUInt32LE(value2, 8);
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buffers.push(res);
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}
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function serialize1i(opcode, value) {
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var res = commandBuffer(opcode, 8);
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res.writeUInt32LE(value, 4);
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buffers.push(res);
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}
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function serialize1f(opcode, value) {
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var res = commandBuffer(opcode, 8);
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res.writeFloatLE(value, 4);
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buffers.push(res);
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}
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function serialize2f(opcode, f1, f2) {
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var res = commandBuffer(opcode, 12);
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res.writeFloatLE(f1, 4);
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res.writeFloatLE(f2, 8);
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buffers.push(res);
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}
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function serialize2i(opcode, i1, i2) {
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var res = commandBuffer(opcode, 12);
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res.writeUInt32LE(i1, 4);
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res.writeUInt32LE(i2, 8);
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buffers.push(res);
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}
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function serialize3i(opcode, i1, i2, i3) {
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var res = commandBuffer(opcode, 16);
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res.writeUInt32LE(i1, 4);
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res.writeUInt32LE(i2, 8);
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res.writeUInt32LE(i3, 12);
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buffers.push(res);
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}
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function serialize2i1f(opcode, i1, i2, f1) {
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var res = commandBuffer(opcode, 16);
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res.writeUInt32LE(i1, 4);
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res.writeUInt32LE(i2, 8);
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res.writeFloatLE(f1, 12);
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buffers.push(res);
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}
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function serialize2ifv(opcode, i1, i2, fv) {
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var res = commandBuffer(opcode, 12 + fv.length*4);
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res.writeUInt32LE(i1, 4);
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res.writeUInt32LE(i2, 8);
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for (var i=0; i < fv.length; ++i)
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res.writeFloatLE(fv[i], 12+i*4);
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buffers.push(res);
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}
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function serialize2i4f(opcode, i1, i2, f1, f2, f3, f4) {
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var res = commandBuffer(opcode, 28);
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res.writeUInt32LE(i1, 4);
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res.writeUInt32LE(i2, 8);
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res.writeFloatLE(f1, 12);
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res.writeFloatLE(f2, 16);
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res.writeFloatLE(f3, 20);
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res.writeFloatLE(f4, 24);
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buffers.push(res);
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}
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function render(ctxLocal) {
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if (!ctxLocal) // ctxLocal overrides ctx passed during creation of renderContext
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ctxLocal = ctx;
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if (buffers.length == 0) {
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buffers = [];
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currentLength = 0;
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return;
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}
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GLX.Render(ctxLocal, buffers);
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buffers = [];
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currentLength = 0;
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}
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var renderContext = {
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Render: render,
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Begin: function(what) {
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serialize1i(4, what);
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},
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End: function() {
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serialize0(23);
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},
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Ortho: function(left, right, bottom, top, znear, zfar) {
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serialize6d(182, left, right, bottom, top, znear, zfar);
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},
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Frustum: function(left, right, bottom, top, znear, zfar) {
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serialize6d(182, left, right, bottom, top, znear, zfar);
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},
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PopMatrix: function() {
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serialize0(183);
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},
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PushMatrix: function() {
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serialize0(184);
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},
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LoadIdentity: function() {
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serialize0(176);
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},
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Rotatef: function(a, x, y, z) {
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serialize4fv(186, a, x, y, z);
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},
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CallList: function(list) {
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serialize1i(1, list);
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},
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Viewport: function(x, y, w, h) {
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serialize4i(191, x, y, w, h); // TODO: x,y - signed, w,h - unsigned (currently all 4 unsigned)
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},
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Vertex3f: function(x, y, z) {
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serialize3fv(70, x, y, z);
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},
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Vertex3fv: function(v) {
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serialize3fv(70, v[0], v[1], v[2]);
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},
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Color3f: function(r, g, b) {
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serialize3fv(8, r, g, b);
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},
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Normal3f: function(x, y, z) {
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serialize3fv(30, x, y, z);
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},
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Normal3fv: function(v) {
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serialize3fv(70, v[0], v[1], v[2]);
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},
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Color4f: function(r, g, b, a) {
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serialize4fv(16, r, g, b, a);
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},
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Scalef: function(x, y, z) {
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serialize3fv(188, x, y, z);
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},
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Translatef: function(x, y, z) {
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serialize3fv(190, x, y, z);
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},
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ClearColor: function(r, g, b, a) {
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serialize4fv(0x82, r, g, b, a);
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},
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MatrixMode: function(mode) {
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serialize1i(179, mode);
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},
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Enable: function(value) {
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serialize1i(139, value);
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},
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Lightfv: function(light, name, p1, p2, p3, p4) {
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if (p1.length)
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serialize2i4f(87, light, name, p1[0], p1[1], p1[2], p1[3]);
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else
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serialize2i4f(87, light, name, p1, p2, p3, p4);
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},
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Materialfv: function(light, name, p1, p2, p3, p4) {
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if (p1.length)
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serialize2i4f(97, light, name, p1[0], p1[1], p1[2], p1[3]);
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else
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serialize2i4f(97, light, name, p1, p2, p3, p4);
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},
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Clear: function(mask) {
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serialize1i(0x7f, mask);
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},
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ShadeModel: function(model) {
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serialize1i(104, model);
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},
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BlendFunc: function(sfactor, dfactor) {
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serialize2i(160, sfactor, dfactor);
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},
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PointSize: function(r) {
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serialize1f(100, r);
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},
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Hint: function(target, mode) {
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serialize2i(85, target, mode);
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},
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BindTexture: function(target, texture) {
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serialize2i(4117, target, texture);
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},
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TexEnvf: function(target, pname, param) {
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serialize2i1f(112, target, pname, param);
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},
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TexParameterf: function(target, pname, param) {
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serialize2i1f(105, target, pname, param);
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},
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TexParameterfv: function(target, pname, param) {
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serialize2ifv(106, target, pname, param);
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},
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TexParameteri: function(target, pname, param) {
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serialize3i(107, target, pname, param);
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},
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TexImage2D: function(target, level, internalFormat, width, height, border, format, type, data) {
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render();
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var typeSize = [];
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typeSize[constants.FLOAT] = 4;
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typeSize[constants.BYTE] = 1;
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typeSize[constants.UNSIGNED_BYTE] = 1;
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var res = new Buffer(60 + data.length*typeSize[type]);
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res.writeUInt32LE(res.length, 0);
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res.writeUInt32LE(110, 4);
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res[8] = 0; // swapbytes
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res[9] = 0; // lsbfirst
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res.writeUInt16LE(0, 10); // unused
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/*
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defaults: (from http://stackoverflow.com/questions/21563590/glteximage2d-protocol-arguments?noredirect=1#comment32577251_21563590 )
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GL_UNPACK_SWAP_BYTES boolean false true or false
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GL_UNPACK_LSB_FIRST boolean false true or false
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GL_UNPACK_ROW_LENGTH integer 0 [0,oo)
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GL_UNPACK_SKIP_ROWS integer 0 [0,oo)
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GL_UNPACK_SKIP_PIXELS integer 0 [0,oo)
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GL_UNPACK_ALIGNMENT integer 4 1, 2, 4, or 8
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*/
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res.writeUInt32LE(0, 12); // rowlength
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res.writeUInt32LE(0, 16); // skiprows
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res.writeUInt32LE(0, 20); // skippixels
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res.writeUInt32LE(4, 24); // alignment
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res.writeUInt32LE(target, 28);
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res.writeUInt32LE(level, 32);
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res.writeUInt32LE(internalFormat, 36);
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res.writeUInt32LE(width, 40);
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res.writeUInt32LE(height, 44);
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res.writeUInt32LE(border, 48);
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res.writeUInt32LE(format, 52);
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res.writeUInt32LE(type, 56);
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switch(type) {
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case constants.FLOAT:
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for (var i=0; i < data.length; ++i)
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res.writeFloatLE(data[i], 60+i*typeSize[type]);
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break;
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case constants.BYTE:
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case constants.UNSIGNED_BYTE:
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for (var i=0; i < data.length; ++i)
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res[60+i] = data[i];
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break;
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default:
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throw new Error('unsupported texture type:' + type);
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}
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// bake sure buffer for glxRender request is emptied first
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render();
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var dataLen = res.length;
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var maxSize = 262124;
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var totalRequests = 1 + parseInt(dataLen / maxSize) - 1;
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if (dataLen % maxSize)
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totalRequests++;
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// for some reason RenderLarge does not like everything to be sent in one go
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// add one extra buffer request for small requests
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if (dataLen < maxSize) {
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GLX.RenderLarge(ctx, 1, 2, res);
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GLX.RenderLarge(ctx, 2, 2, Buffer(0));
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return;
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}
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var pos = 0;
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var reqNum = 1;
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while(dataLen > 0) {
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if (dataLen < maxSize) {
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GLX.RenderLarge(ctx, reqNum, totalRequests, res.slice(pos));
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break;
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} else {
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GLX.RenderLarge(ctx, reqNum, totalRequests, res.slice(pos, pos + maxSize));
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pos += maxSize;
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dataLen -= maxSize;
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reqNum++;
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}
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}
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},
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ProgramString: function(target, format, src) {
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serialize3i(target, format, src);
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buffers.push(Buffer(src));
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},
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BindProgram: function(target, program) {
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serialize2i(target, format, src);
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},
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TexCoord2f: function(x, y) {
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serialize2f(54, x, y);
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}
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};
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// import all constants
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for (var c in constants)
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renderContext[c] = constants[c];
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// bind some glx functions
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||
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|
'NewList EndList GenLists GenTextures IsTexture SwapBuffers Finish'.split(' ').forEach(function(name) {
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||
|
|
// todo: small camelCase ? to be consistent with webgl api
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||
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|
//renderContext[name] = GLX[name].bind(GLX, ctx);
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||
|
|
|
||
|
|
// flush render buffer before glx requests
|
||
|
|
renderContext[name] = function(p1, p2, p3, p4, p5, p6, p7, p8) {
|
||
|
|
render();
|
||
|
|
GLX[name](ctx, p1, p2, p3, p4, p5, p6, p7, p8);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
return renderContext;
|
||
|
|
}
|