mirror of
https://github.com/sle118/squeezelite-esp32.git
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271 lines
9.9 KiB
C
271 lines
9.9 KiB
C
/**
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* Copyright (c) 2017-2018 Tara Keeling
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* 2020 Philippe G.
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*
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* This software is released under the MIT License.
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* https://opensource.org/licenses/MIT
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <math.h>
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#include <esp_attr.h>
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#include "gds_private.h"
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#include "gds.h"
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#include "gds_draw.h"
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static const unsigned char BitReverseTable256[] =
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{
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0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0, 0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0,
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0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8, 0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8,
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0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4, 0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4,
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0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC, 0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC,
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0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2, 0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2,
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0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA, 0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA,
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0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6, 0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6,
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0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE, 0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE,
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0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1, 0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1,
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0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9, 0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9,
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0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5, 0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5,
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0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED, 0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD,
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0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3, 0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3,
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0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB, 0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB,
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0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7, 0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7,
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0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF, 0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF
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};
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__attribute__( ( always_inline ) ) static inline void SwapInt( int* a, int* b ) {
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int Temp = *b;
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*b = *a;
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*a = Temp;
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}
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// un-comment if need to be instanciated for external callers
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extern inline void IRAM_ATTR GDS_DrawPixelFast( struct GDS_Device* Device, int X, int Y, int Color );
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extern inline void IRAM_ATTR GDS_DrawPixel( struct GDS_Device* Device, int X, int Y, int Color );
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void GDS_DrawHLine( struct GDS_Device* Device, int x, int y, int Width, int Color ) {
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int XEnd = x + Width;
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Device->Dirty = true;
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if (x < 0) x = 0;
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if (XEnd >= Device->Width) XEnd = Device->Width - 1;
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if (y < 0) y = 0;
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else if (y >= Device->Height) y = Device->Height - 1;
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for ( ; x < XEnd; x++ ) GDS_DrawPixelFast( Device, x, y, Color );
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}
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void GDS_DrawVLine( struct GDS_Device* Device, int x, int y, int Height, int Color ) {
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int YEnd = y + Height;
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Device->Dirty = true;
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if (x < 0) x = 0;
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if (x >= Device->Width) x = Device->Width - 1;
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if (y < 0) y = 0;
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else if (YEnd >= Device->Height) YEnd = Device->Height - 1;
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for ( ; y < YEnd; y++ ) GDS_DrawPixel( Device, x, y, Color );
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}
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static inline void DrawWideLine( struct GDS_Device* Device, int x0, int y0, int x1, int y1, int Color ) {
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int dx = ( x1 - x0 );
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int dy = ( y1 - y0 );
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int Error = 0;
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int Incr = 1;
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int x = x0;
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int y = y0;
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if ( dy < 0 ) {
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Incr = -1;
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dy = -dy;
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}
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Error = ( dy * 2 ) - dx;
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for ( ; x < x1; x++ ) {
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if ( IsPixelVisible( Device, x, y ) == true ) {
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GDS_DrawPixelFast( Device, x, y, Color );
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}
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if ( Error > 0 ) {
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Error-= ( dx * 2 );
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y+= Incr;
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}
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Error+= ( dy * 2 );
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}
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}
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static inline void DrawTallLine( struct GDS_Device* Device, int x0, int y0, int x1, int y1, int Color ) {
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int dx = ( x1 - x0 );
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int dy = ( y1 - y0 );
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int Error = 0;
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int Incr = 1;
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int x = x0;
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int y = y0;
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if ( dx < 0 ) {
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Incr = -1;
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dx = -dx;
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}
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Error = ( dx * 2 ) - dy;
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for ( ; y < y1; y++ ) {
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if ( IsPixelVisible( Device, x, y ) == true ) {
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GDS_DrawPixelFast( Device, x, y, Color );
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}
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if ( Error > 0 ) {
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Error-= ( dy * 2 );
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x+= Incr;
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}
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Error+= ( dx * 2 );
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}
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}
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void GDS_DrawLine( struct GDS_Device* Device, int x0, int y0, int x1, int y1, int Color ) {
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if ( x0 == x1 ) {
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GDS_DrawVLine( Device, x0, y0, ( y1 - y0 ), Color );
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} else if ( y0 == y1 ) {
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GDS_DrawHLine( Device, x0, y0, ( x1 - x0 ), Color );
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} else {
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Device->Dirty = true;
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if ( abs( x1 - x0 ) > abs( y1 - y0 ) ) {
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/* Wide ( run > rise ) */
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if ( x0 > x1 ) {
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SwapInt( &x0, &x1 );
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SwapInt( &y0, &y1 );
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}
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DrawWideLine( Device, x0, y0, x1, y1, Color );
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} else {
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/* Tall ( rise > run ) */
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if ( y0 > y1 ) {
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SwapInt( &y0, &y1 );
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SwapInt( &x0, &x1 );
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}
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DrawTallLine( Device, x0, y0, x1, y1, Color );
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}
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}
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}
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void GDS_DrawBox( struct GDS_Device* Device, int x1, int y1, int x2, int y2, int Color, bool Fill ) {
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int Width = ( x2 - x1 );
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int Height = ( y2 - y1 );
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Device->Dirty = true;
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if ( Fill == false ) {
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/* Top side */
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GDS_DrawHLine( Device, x1, y1, Width, Color );
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/* Bottom side */
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GDS_DrawHLine( Device, x1, y1 + Height, Width, Color );
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/* Left side */
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GDS_DrawVLine( Device, x1, y1, Height, Color );
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/* Right side */
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GDS_DrawVLine( Device, x1 + Width, y1, Height, Color );
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} else {
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/* Fill the box by drawing horizontal lines */
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for ( ; y1 <= y2; y1++ ) {
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GDS_DrawHLine( Device, x1, y1, Width, Color );
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}
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}
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}
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/****************************************************************************************
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* Process graphic display data from column-oriented data (MSbit first)
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*/
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void GDS_DrawBitmapCBR(struct GDS_Device* Device, uint8_t *Data, int Width, int Height, int Color ) {
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if (!Height) Height = Device->Height;
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if (!Width) Width = Device->Width;
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Height >>= 3;
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if (Device->DrawBitmapCBR) {
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Device->DrawBitmapCBR( Device, Data, Width, Height, Color );
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} else if (Device->Depth == 1) {
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// need to do row/col swap and bit-reverse
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for (int r = 0; r < Height; r++) {
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uint8_t *optr = Device->Framebuffer + r*Device->Width, *iptr = Data + r;
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for (int c = Width; --c >= 0;) {
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*optr++ = BitReverseTable256[*iptr];
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iptr += Height;
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}
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}
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} else if (Device->Depth == 4) {
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uint8_t *optr = Device->Framebuffer;
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int LineLen = Device->Width >> 1;
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for (int i = Width * Height, r = 0, c = 0; --i >= 0;) {
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uint8_t Byte = BitReverseTable256[*Data++];
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// we need to linearize code to let compiler better optimize
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if (c & 0x01) {
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*optr = (*optr & 0x0f) | (((Byte & 0x01)*Color)<<4); optr += LineLen; Byte >>= 1;
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*optr = (*optr & 0x0f) | (((Byte & 0x01)*Color)<<4); optr += LineLen; Byte >>= 1;
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*optr = (*optr & 0x0f) | (((Byte & 0x01)*Color)<<4); optr += LineLen; Byte >>= 1;
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*optr = (*optr & 0x0f) | (((Byte & 0x01)*Color)<<4); optr += LineLen; Byte >>= 1;
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*optr = (*optr & 0x0f) | (((Byte & 0x01)*Color)<<4); optr += LineLen; Byte >>= 1;
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*optr = (*optr & 0x0f) | (((Byte & 0x01)*Color)<<4); optr += LineLen; Byte >>= 1;
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*optr = (*optr & 0x0f) | (((Byte & 0x01)*Color)<<4); optr += LineLen; Byte >>= 1;
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*optr = (*optr & 0x0f) | (((Byte & 0x01)*Color)<<4); optr += LineLen; Byte >>= 1;
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} else {
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*optr = (*optr & 0xf0) | (((Byte & 0x01)*Color)); optr += LineLen; Byte >>= 1;
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*optr = (*optr & 0xf0) | (((Byte & 0x01)*Color)); optr += LineLen; Byte >>= 1;
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*optr = (*optr & 0xf0) | (((Byte & 0x01)*Color)); optr += LineLen; Byte >>= 1;
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*optr = (*optr & 0xf0) | (((Byte & 0x01)*Color)); optr += LineLen; Byte >>= 1;
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*optr = (*optr & 0xf0) | (((Byte & 0x01)*Color)); optr += LineLen; Byte >>= 1;
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*optr = (*optr & 0xf0) | (((Byte & 0x01)*Color)); optr += LineLen; Byte >>= 1;
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*optr = (*optr & 0xf0) | (((Byte & 0x01)*Color)); optr += LineLen; Byte >>= 1;
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*optr = (*optr & 0xf0) | (((Byte & 0x01)*Color)); optr += LineLen; Byte >>= 1;
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}
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// end of a column, move to next one
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if (++r == Height) { c++; r = 0; optr = Device->Framebuffer + (c >> 1); }
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}
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} else {
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// don't know bitdepth, use brute-force solution
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for (int i = Width * Height, r = 0, c = 0; --i >= 0;) {
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uint8_t Byte = *Data++;
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GDS_DrawPixelFast( Device, c, (r << 3) + 7, (Byte & 0x01) * Color ); Byte >>= 1;
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GDS_DrawPixelFast( Device, c, (r << 3) + 6, (Byte & 0x01) * Color ); Byte >>= 1;
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GDS_DrawPixelFast( Device, c, (r << 3) + 5, (Byte & 0x01) * Color ); Byte >>= 1;
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GDS_DrawPixelFast( Device, c, (r << 3) + 4, (Byte & 0x01) * Color ); Byte >>= 1;
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GDS_DrawPixelFast( Device, c, (r << 3) + 3, (Byte & 0x01) * Color ); Byte >>= 1;
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GDS_DrawPixelFast( Device, c, (r << 3) + 2, (Byte & 0x01) * Color ); Byte >>= 1;
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GDS_DrawPixelFast( Device, c, (r << 3) + 1, (Byte & 0x01) * Color ); Byte >>= 1;
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GDS_DrawPixelFast( Device, c, (r << 3) + 0, (Byte & 0x01) * Color );
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if (++r == Height) { c++; r = 0; }
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}
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/* for better understanding, here is the mundane version
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for (int x = 0; x < Width; x++) {
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for (int y = 0; y < Height; y++) {
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uint8_t Byte = *Data++;
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GDS_DrawPixel4Fast( Device, x, y * 8 + 0, ((Byte >> 7) & 0x01) * Color );
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GDS_DrawPixel4Fast( Device, x, y * 8 + 1, ((Byte >> 6) & 0x01) * Color );
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GDS_DrawPixel4Fast( Device, x, y * 8 + 2, ((Byte >> 5) & 0x01) * Color );
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GDS_DrawPixel4Fast( Device, x, y * 8 + 3, ((Byte >> 4) & 0x01) * Color );
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GDS_DrawPixel4Fast( Device, x, y * 8 + 4, ((Byte >> 3) & 0x01) * Color );
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GDS_DrawPixel4Fast( Device, x, y * 8 + 5, ((Byte >> 2) & 0x01) * Color );
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GDS_DrawPixel4Fast( Device, x, y * 8 + 6, ((Byte >> 1) & 0x01) * Color );
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GDS_DrawPixel4Fast( Device, x, y * 8 + 7, ((Byte >> 0) & 0x01) * Color );
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}
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}
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*/
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}
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Device->Dirty = true;
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} |