141 lines
4.3 KiB
GLSL
141 lines
4.3 KiB
GLSL
/**
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*
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* RenderPipeline
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*
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* Copyright (c) 2014-2016 tobspr <tobias.springer1@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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*/
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#version 430
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#pragma include "render_pipeline_base.inc.glsl"
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uniform samplerBuffer CommandQueue;
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uniform writeonly imageBuffer RESTRICT LightData;
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uniform writeonly imageBuffer RESTRICT SourceData;
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uniform int commandCount;
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// Reads a single float from the data stack
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float read_float(inout int stack_ptr) {
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return texelFetch(CommandQueue, stack_ptr++).x;
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}
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// Reads a single int from the data stack
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int read_int(inout int stack_ptr) {
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return gpu_cq_unpack_int_from_float(read_float(stack_ptr));
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}
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// Reads a 4-component vector from the data stack
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vec4 read_vec4(inout int stack_ptr) {
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stack_ptr += 4;
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return vec4(
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texelFetch(CommandQueue, stack_ptr - 4).x,
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texelFetch(CommandQueue, stack_ptr - 3).x,
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texelFetch(CommandQueue, stack_ptr - 2).x,
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texelFetch(CommandQueue, stack_ptr - 1).x
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);
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}
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void main() {
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// Store a pointer to the current stack index, its passed as a handle to all
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// read functions
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int stack_ptr = 0;
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// Process each command
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for (int command_index = 0; command_index < commandCount; ++command_index) {
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stack_ptr = command_index * 32;
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int command_type = read_int(stack_ptr);
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switch(command_type) {
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// Invalid Command Code
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case CMD_invalid: break;
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// Store Light
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case CMD_store_light: {
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// Read the destination slot of the light
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int slot = read_int(stack_ptr);
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int offs = slot * 4;
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// Copy the data over
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for (int i = 0; i < 4; ++i) {
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imageStore(LightData, offs + i, read_vec4(stack_ptr));
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}
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break;
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}
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// Remove Light
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case CMD_remove_light: {
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// Read the lights slot position
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int slot = read_int(stack_ptr);
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int offs = slot * 4;
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// Set the data to all zeroes, this indicates a null light
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for (int i = 0; i < 4; ++i) {
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imageStore(LightData, offs + i, vec4(0));
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}
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break;
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}
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// Store Source
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case CMD_store_source: {
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int slot = read_int(stack_ptr);
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int offs = slot * 5;
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// Copy the data over
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for (int i = 0; i < 5; ++i) {
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imageStore(SourceData, offs + i, read_vec4(stack_ptr));
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}
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break;
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}
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// Remove consecutive sources
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case CMD_remove_sources: {
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int base_slot = read_int(stack_ptr);
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int num_slots = read_int(stack_ptr);
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for (int slot = base_slot; slot < base_slot + num_slots; ++slot) {
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int offs = slot * 5;
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// Set the data to all zeroes, this indicates an unused source
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for (int i = 0; i < 5; ++i) {
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imageStore(SourceData, offs + i, vec4(0));
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}
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}
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break;
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}
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// .. further commands will follow here
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}
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}
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}
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