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112 lines
3.2 KiB
C
112 lines
3.2 KiB
C
/*
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* Copyright (C) 2018 bzt (bztsrc@github)
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* 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
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* included in 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,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* 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
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* DEALINGS IN THE SOFTWARE.
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*
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*/
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#include "uart.h"
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#include "mbox.h"
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#include "homer.h"
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unsigned int width, height, pitch;
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unsigned char *lfb;
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/**
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* Set screen resolution to 1024x768
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*/
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void lfb_init()
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{
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mbox[0] = 35*4;
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mbox[1] = MBOX_REQUEST;
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mbox[2] = 0x48003; //set phy wh
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mbox[3] = 8;
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mbox[4] = 8;
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mbox[5] = 1024; //FrameBufferInfo.width
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mbox[6] = 768; //FrameBufferInfo.height
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mbox[7] = 0x48004; //set virt wh
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mbox[8] = 8;
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mbox[9] = 8;
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mbox[10] = 1024; //FrameBufferInfo.virtual_width
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mbox[11] = 768; //FrameBufferInfo.virtual_height
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mbox[12] = 0x48009; //set virt offset
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mbox[13] = 8;
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mbox[14] = 8;
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mbox[15] = 0; //FrameBufferInfo.x_offset
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mbox[16] = 0; //FrameBufferInfo.y.offset
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mbox[17] = 0x48005; //set depth
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mbox[18] = 4;
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mbox[19] = 4;
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mbox[20] = 32; //FrameBufferInfo.depth
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mbox[21] = 0x48006; //set pixel order
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mbox[22] = 4;
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mbox[23] = 4;
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mbox[24] = 1; //RGB, not BGR preferably
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mbox[25] = 0x40001; //get framebuffer, gets alignment on request
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mbox[26] = 8;
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mbox[27] = 8;
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mbox[28] = 4096; //FrameBufferInfo.pointer
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mbox[29] = 0; //FrameBufferInfo.size
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mbox[30] = 0x40008; //get pitch
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mbox[31] = 4;
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mbox[32] = 4;
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mbox[33] = 0; //FrameBufferInfo.pitch
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mbox[34] = MBOX_TAG_LAST;
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if(mbox_call(MBOX_CH_PROP) && mbox[20]==32 && mbox[28]!=0) {
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mbox[28]&=0x3FFFFFFF;
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width=mbox[5];
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height=mbox[6];
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pitch=mbox[33];
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lfb=(void*)((unsigned long)mbox[28]);
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} else {
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uart_puts("Unable to set screen resolution to 1024x768x32\n");
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}
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}
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/**
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* Show a picture
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*/
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void lfb_showpicture()
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{
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int x,y;
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unsigned char *ptr=lfb;
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char *data=homer_data, pixel[4];
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ptr += (height-homer_height)/2*pitch + (width-homer_width)*2;
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for(y=0;y<homer_height;y++) {
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for(x=0;x<homer_width;x++) {
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HEADER_PIXEL(data, pixel);
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*((unsigned int*)ptr)=*((unsigned int *)&pixel);
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ptr+=4;
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}
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ptr+=pitch-homer_width*4;
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}
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}
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