128 lines
3.9 KiB
C
128 lines
3.9 KiB
C
/* Copyright (C) 2015-2016 by Jacob Alexander
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*
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* This file is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This file is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this file. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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// ----- Includes -----
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// Compiler Includes
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#include <stdint.h>
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// ----- Enums -----
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typedef enum FrameState {
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FrameState_Ready, // Buffers have been updated and are ready to send
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FrameState_Sending, // Buffers are currently being sent, do not change
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FrameState_Update, // Buffers need to be updated to latest frame
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} FrameState;
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// Pixel Change Storage
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// - Store only the change of the pixel
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// - Change is a value (size of the pixel)
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// - Contiguous sets of pixel changes can be stored for maximized packing (with the same width)
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// - Each value has a corresponding operator
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// * Add
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// * Subtract
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// * Left shift
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// * Right shift
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// * Set
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// * Add no-rollover
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// * Subtract no-rollover
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typedef enum PixelChange {
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PixelChange_Set = 0, // =
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PixelChange_Add, // +
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PixelChange_Subtract, // -
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PixelChange_NoRoll_Add, // +:
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PixelChange_NoRoll_Subtract, // -:
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PixelChange_LeftShift, // <<
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PixelChange_RightShift, // >>
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} PixelChange;
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// Animation modifiers
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typedef enum AnimationModifier {
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AnimationModifier_None = 0x00,
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AnimationModifier_Fallthrough = 0x01, // Process lower animation first
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} AnimationModifier;
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// ----- Structs -----
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// Element of array of buffers pointers
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typedef struct PixelBuf {
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uint8_t size; // Number of elements
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uint8_t width; // Width of each element
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uint16_t offset; // Subtraction offset from absolute channel
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void *data; // Pointer to start of buffer
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} PixelBuf;
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#define PixelBufElem(len,width,offset,ptr) { len, width, offset, (void*)ptr }
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#define PixelBuf8(pixbuf, ch) ( ((uint8_t*) (pixbuf.data))[ ch - pixbuf.offset ] )
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#define PixelBuf16(pixbuf, ch) ( ((uint16_t*)(pixbuf.data))[ ch - pixbuf.offset ] )
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// Individual Pixel element
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#define Pixel_MaxChannelPerPixel 3 // TODO Generate
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typedef struct PixelElement {
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uint8_t width; // Number of bits in a channel
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uint8_t channels; // Number of channels
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// Hardware indices for each channel
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uint16_t indices[Pixel_MaxChannelPerPixel];
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} PixelElement;
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#define Pixel_RGBChannel(r,g,b) { 8, 3, { r, g, b } }
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// TODO generate macro based on max channels
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//#define Pixel_8bitChannel(c) { 8, 1, { c } }
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typedef struct PixelMod {
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uint16_t pixel; // Pixel index
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PixelChange change; // Change to apply to pixel
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uint8_t contiguousPixels; // # of contiguous pixels to apply same changes too
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uint8_t data[0]; // Data size depends on PixelElement definition
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} PixelMod;
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// Animation stack element
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typedef struct AnimationElement {
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uint16_t index; // Animation id
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uint16_t pos; // Current frame
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uint8_t loops; // # of loops to run animation, 0 indicates infinite
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uint8_t divider; // # of times to repeat each frame
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AnimationModifier modifier; // Modifier applied to the entire animation
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} AnimationElement;
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// Animation stack
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#define Pixel_AnimationStackSize 16
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typedef struct AnimationStack {
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uint16_t size;
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AnimationElement stack[Pixel_AnimationStackSize];
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} AnimationStack;
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// ----- Variables -----
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extern FrameState Pixel_FrameState;
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// ----- Functions -----
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void Pixel_process();
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void Pixel_setup();
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