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124 lines
4.3 KiB
124 lines
4.3 KiB
4 months ago
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/*
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* Copyright (c) 2013, The Linux Foundation. All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of The Linux Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "qd_utils.h"
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#define MAX_FRAME_BUFFER_NAME_SIZE (80)
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#define QD_UTILS_DEBUG 0
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int getHDMINode(void)
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{
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FILE *displayDeviceFP = NULL;
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char fbType[MAX_FRAME_BUFFER_NAME_SIZE];
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char msmFbTypePath[MAX_FRAME_BUFFER_NAME_SIZE];
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int j = 0;
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for(j = 0; j < HWC_NUM_DISPLAY_TYPES; j++) {
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snprintf (msmFbTypePath, sizeof(msmFbTypePath),
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"/sys/class/graphics/fb%d/msm_fb_type", j);
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displayDeviceFP = fopen(msmFbTypePath, "r");
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if(displayDeviceFP) {
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fread(fbType, sizeof(char), MAX_FRAME_BUFFER_NAME_SIZE,
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displayDeviceFP);
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if(strncmp(fbType, "dtv panel", strlen("dtv panel")) == 0) {
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ALOGD("%s: HDMI is at fb%d", __func__, j);
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fclose(displayDeviceFP);
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break;
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}
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fclose(displayDeviceFP);
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} else {
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ALOGE("%s: Failed to open fb node %d", __func__, j);
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}
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}
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if (j < HWC_NUM_DISPLAY_TYPES)
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return j;
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else
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ALOGE("%s: Failed to find HDMI node", __func__);
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return -1;
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}
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int getEdidRawData(char *buffer)
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{
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int size;
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int edidFile;
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char msmFbTypePath[MAX_FRAME_BUFFER_NAME_SIZE];
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int node_id = getHDMINode();
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if (node_id < 0) {
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ALOGE("%s no HDMI node found", __func__);
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return 0;
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}
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snprintf(msmFbTypePath, sizeof(msmFbTypePath),
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"/sys/class/graphics/fb%d/edid_raw_data", node_id);
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edidFile = open(msmFbTypePath, O_RDONLY, 0);
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if (edidFile < 0) {
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ALOGE("%s no edid raw data found", __func__);
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return 0;
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}
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size = (int)read(edidFile, (char*)buffer, EDID_RAW_DATA_SIZE);
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close(edidFile);
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return size;
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}
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/* Calculates the aspect ratio for based on src & dest */
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void getAspectRatioPosition(int destWidth, int destHeight, int srcWidth,
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int srcHeight, hwc_rect_t& rect) {
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int x =0, y =0;
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if (srcWidth * destHeight > destWidth * srcHeight) {
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srcHeight = destWidth * srcHeight / srcWidth;
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srcWidth = destWidth;
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} else if (srcWidth * destHeight < destWidth * srcHeight) {
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srcWidth = destHeight * srcWidth / srcHeight;
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srcHeight = destHeight;
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} else {
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srcWidth = destWidth;
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srcHeight = destHeight;
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}
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if (srcWidth > destWidth) srcWidth = destWidth;
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if (srcHeight > destHeight) srcHeight = destHeight;
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x = (destWidth - srcWidth) / 2;
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y = (destHeight - srcHeight) / 2;
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ALOGD_IF(QD_UTILS_DEBUG, "%s: AS Position: x = %d, y = %d w = %d h = %d",
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__FUNCTION__, x, y, srcWidth , srcHeight);
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// Convert it back to hwc_rect_t
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rect.left = x;
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rect.top = y;
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rect.right = srcWidth + rect.left;
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rect.bottom = srcHeight + rect.top;
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}
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