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| /*********************************************************************************************************\ | ||
| |* *| | ||
| |* SPDX-FileCopyrightText: Copyright (c) 2019-2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved. *| | ||
| |* SPDX-License-Identifier: MIT *| | ||
| |* *| | ||
| |* Permission is hereby granted, free of charge, to any person obtaining a *| | ||
| |* copy of this software and associated documentation files (the "Software"), *| | ||
| |* to deal in the Software without restriction, including without limitation *| | ||
| |* the rights to use, copy, modify, merge, publish, distribute, sublicense, *| | ||
| |* and/or sell copies of the Software, and to permit persons to whom the *| | ||
| |* Software is furnished to do so, subject to the following conditions: *| | ||
| |* *| | ||
| |* The above copyright notice and this permission notice shall be included in *| | ||
| |* all copies or substantial portions of the Software. *| | ||
| |* *| | ||
| |* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *| | ||
| |* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *| | ||
| |* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *| | ||
| |* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER *| | ||
| |* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING *| | ||
| |* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER *| | ||
| |* DEALINGS IN THE SOFTWARE. *| | ||
| |* *| | ||
| |* *| | ||
| \*********************************************************************************************************/ | ||
| ///////////////////////////////////////////////////////////////////////////////////////////////////////// | ||
|
|
||
| //////////////////////////////////////////////////////////////////////////////////// | ||
| // @brief: This is the entry point for the console application. | ||
| // This program applies a fixed custom resolution to the attached monitor | ||
| // It applies the custom settings each active display in the following sequence: | ||
| // NvAPI_DISP_TryCustomDisplay... Wait for 5 seconds | ||
| // NvAPI_DISP_SaveCustomDisplay... Wait for 5 seconds | ||
| // NvAPI_DISP_RevertCustomDisplay... Wait for 5 seconds | ||
| // | ||
| // @assumptions: This code is designed for Win7+ operating systems. It assumes that | ||
| // the system has atleast one active display. | ||
| // | ||
| // @driver support: R313+ | ||
| //////////////////////////////////////////////////////////////////////////////////// | ||
|
|
||
| #include <stdio.h> | ||
| #include <windows.h> | ||
| #include <tchar.h> | ||
| #include "nvapi.h" | ||
|
|
||
| // Link the lib file. | ||
| // The following line is needed if we are building the code using the command line compiler. | ||
| // If we are building using the Visual Studio, we can point to the lib file using the UI. | ||
| #pragma comment(lib, "nvapi64.lib") | ||
|
|
||
| // This function applies the loaded custom timings on all available displays | ||
| NvAPI_Status ApplyCustomDisplay(); | ||
|
|
||
| // This function enumerates the display Ids of all the connected displays | ||
| NvAPI_Status GetConnectedDisplays(NvU32 *displayIds, NvU32 *noDisplays); | ||
|
|
||
| // This function applies custom display settings, saves them and reverts back. | ||
| void loadCustomDisplay(NV_CUSTOM_DISPLAY *customDisplay); | ||
|
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||
| int _tmain(int argc, _TCHAR *argv[]) | ||
| { | ||
| NvAPI_Status ret = NVAPI_OK; | ||
|
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||
| ret = NvAPI_Initialize(); | ||
| if(ret != NVAPI_OK) | ||
| { | ||
| printf("NvAPI_Initialize() failed = 0x%x", ret); | ||
| return 1; // Initialization failed | ||
| } | ||
|
|
||
| for(NvU32 q = 0; q < 50; q++) | ||
| { | ||
| printf("/"); | ||
| } | ||
| printf("\n"); | ||
|
|
||
| ret = ApplyCustomDisplay(); | ||
| if(ret != NVAPI_OK) | ||
| { | ||
| getchar(); | ||
| return 1; // Failed to apply custom display | ||
| } | ||
| printf("\n"); | ||
|
|
||
| for(NvU32 q = 0; q < 50; q++) | ||
| { | ||
| printf("/"); | ||
| } | ||
| printf("\n"); | ||
|
|
||
| printf("\nCustom_Timing successful!\nPress any key to exit...\n"); | ||
| getchar(); | ||
| return 0; | ||
| } | ||
|
|
||
| void loadCustomDisplay(NV_CUSTOM_DISPLAY *cd) | ||
| { | ||
| cd->version = NV_CUSTOM_DISPLAY_VER; | ||
| cd->width = 1024; | ||
| cd->height = 999; | ||
| cd->depth = 32; | ||
| cd->colorFormat = NV_FORMAT_A8R8G8B8; | ||
| cd->srcPartition.x = 0; | ||
| cd->srcPartition.y = 0; | ||
| cd->srcPartition.w = 1; | ||
| cd->srcPartition.h = 1; | ||
| cd->xRatio = 1; | ||
| cd->yRatio = 1; | ||
| } | ||
|
|
||
| NvAPI_Status GetConnectedDisplays(NvU32 *displayIds, NvU32 *noDisplays) | ||
| { | ||
| NvAPI_Status ret = NVAPI_OK; | ||
|
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||
| NvPhysicalGpuHandle nvGPUHandle[NVAPI_MAX_PHYSICAL_GPUS] = { 0 }; | ||
| NvU32 gpuCount = 0; | ||
| NvU32 noDisplay = 0; | ||
|
|
||
| // Get all the Physical GPU Handles | ||
| ret = NvAPI_EnumPhysicalGPUs(nvGPUHandle, &gpuCount); | ||
| if(ret != NVAPI_OK) | ||
| { | ||
| return ret; | ||
| } | ||
|
|
||
| for(NvU32 Count = 0; Count < gpuCount; Count++) // iterating per Physical GPU Handle call | ||
| { | ||
| NvU32 dispIdCount = 0; | ||
| // First call to get the no. of displays connected by passing NULL | ||
| if(NvAPI_GPU_GetConnectedDisplayIds(nvGPUHandle[Count], NULL, &dispIdCount, 0) != NVAPI_OK) | ||
| { | ||
| return NVAPI_ERROR; | ||
| } | ||
|
|
||
| if(dispIdCount > 0) // If no. of displays connected > 0 we can proceed to check if its active | ||
| { | ||
| // alocations for the display ids | ||
| NV_GPU_DISPLAYIDS *dispIds = (NV_GPU_DISPLAYIDS *)malloc( sizeof(NV_GPU_DISPLAYIDS)*dispIdCount ); | ||
|
|
||
| for(NvU32 dispIndex = 0; dispIndex < dispIdCount; dispIndex++) | ||
| { | ||
| dispIds[dispIndex].version = NV_GPU_DISPLAYIDS_VER; // adding the correct version information | ||
| } | ||
|
|
||
| // second call to get the display ids | ||
| if(NvAPI_GPU_GetConnectedDisplayIds(nvGPUHandle[Count], dispIds, &dispIdCount, 0) != NVAPI_OK) | ||
| { | ||
| return NVAPI_ERROR; | ||
| } | ||
|
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||
| for(NvU32 dispIndex = 0; dispIndex < dispIdCount; dispIndex++) | ||
| { | ||
| if(dispIds[dispIndex].isMultiStreamRootNode) | ||
| { | ||
| continue; | ||
| } | ||
| displayIds[noDisplay] = dispIds[dispIndex].displayId; | ||
| noDisplay++; | ||
| } | ||
| } | ||
| } | ||
|
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| *noDisplays = noDisplay; | ||
|
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| return ret; | ||
| } | ||
|
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| NvAPI_Status ApplyCustomDisplay() | ||
| { | ||
| NvAPI_Status ret = NVAPI_OK; | ||
| NvU32 noDisplays = 0; | ||
|
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| NvDisplayHandle hNvDisplay[NVAPI_MAX_DISPLAYS] = {0}; | ||
|
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| NvU32 displayIds[NVAPI_MAX_DISPLAYS] = {0}; | ||
|
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| ret = GetConnectedDisplays(&displayIds[0],&noDisplays); | ||
| if(ret != NVAPI_OK) | ||
| { | ||
| printf("\nCall to GetConnectedDisplays() failed"); | ||
| return ret; | ||
| } | ||
|
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| printf("\nNumber of Displays in the system = %2d",noDisplays); | ||
|
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| NV_CUSTOM_DISPLAY cd[NVAPI_MAX_DISPLAYS] = {0}; | ||
|
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| float rr = 60; | ||
|
|
||
| //timing computation (to get timing that suits the changes made) | ||
| NV_TIMING_FLAG flag = {0}; | ||
|
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| NV_TIMING_INPUT timing = {0}; | ||
|
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| timing.version = NV_TIMING_INPUT_VER; | ||
|
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||
| for (NvU32 count = 0; count < noDisplays; count++) | ||
| { | ||
| //Load the NV_CUSTOM_DISPLAY structure with data from XML file | ||
| loadCustomDisplay(&cd[count]); | ||
|
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||
| timing.height = cd[count].height; | ||
| timing.width = cd[count].width; | ||
| timing.rr = rr; | ||
|
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| timing.flag = flag; | ||
| timing.type = NV_TIMING_OVERRIDE_CVT_RB; | ||
| timing.flag.scaling = 1; | ||
|
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||
| ret = NvAPI_DISP_GetTiming( displayIds[0], &timing, &cd[count].timing); | ||
|
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| if ( ret != NVAPI_OK) | ||
| { | ||
| printf("NvAPI_DISP_GetTiming() failed = %d\n", ret); //failed to get custom display timing | ||
| return ret; | ||
| } | ||
| } | ||
|
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||
| printf("\nCustom Timing to be tried: "); | ||
| printf("%d X %d @ %0.2f hz",cd[0].width,cd[0].height,rr); | ||
|
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| printf("\nNvAPI_DISP_TryCustomDisplay()"); | ||
|
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| ret = NvAPI_DISP_TryCustomDisplay(&displayIds[0],noDisplays, &cd[0]); // trying to set custom display | ||
| if ( ret != NVAPI_OK) | ||
| { | ||
| printf("NvAPI_DISP_TryCustomDisplay() failed = %d", ret); //failed to set custom display | ||
| return ret; | ||
| } | ||
| else | ||
| { | ||
| printf(".....Success!\n"); | ||
| } | ||
| Sleep(5000); | ||
|
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||
| printf("NvAPI_DISP_SaveCustomDisplay()"); | ||
|
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| ret = NvAPI_DISP_SaveCustomDisplay(&displayIds[0],noDisplays, true, true); | ||
| if ( ret != NVAPI_OK) | ||
| { | ||
| printf("NvAPI_DISP_SaveCustomDisplay() failed = %d", ret); //failed to save custom display | ||
| return ret; | ||
| } | ||
| else | ||
| { | ||
| printf(".....Success!\n"); | ||
| } | ||
|
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||
| Sleep(5000); | ||
|
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| printf("NvAPI_DISP_RevertCustomDisplayTrial()"); | ||
|
|
||
| // Revert the new custom display settings tried. | ||
| ret = NvAPI_DISP_RevertCustomDisplayTrial(&displayIds[0],1); | ||
| if ( ret != NVAPI_OK) | ||
| { | ||
| printf("NvAPI_DISP_RevertCustomDisplayTrial() failed = %d", ret); //failed to revert custom display trail | ||
| return ret; | ||
| } | ||
| else | ||
| { | ||
| printf(".....Success!"); | ||
| Sleep(5000); | ||
|
|
||
| } | ||
|
|
||
| return ret; // Custom Display. | ||
| } |
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