delphi调用AMD ADL c ++ dll [英] delphi calling AMD ADL c++ dll
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问题描述
尝试与AMD ADL库（DLL）交互以检索图形卡上的信息。有一些功能可以使用，但是有问题。
请参阅相同的问题但无答案的帖子： ATI ADL-AdapterInfo_Get
Trying to interface with AMD ADL library (DLL) to retrieve info on the graphics card. Got some of the functions to work but having problems.
Pls see this post with same question but no answer: ATI ADL - AdapterInfo_Get
该函数使用delphi数组返回，但内容错误。
该函数使用指向缓冲区的指针返回，但数据相同[错误]。
[请参见下面的代码示例]
The function returns using a delphi array but the content is wrong.
The function returns using a pointer to a buffer but the data is the same [wrong].
[see below for code example]
该功能在文档中定义如下：
The function is defined in the documentation as follows:
int ADL_Adapter_AdapterInfo_Get(LPAdapterInfo lpInfo, int iInputSize)
Retrieves all OS-known adapter information.
This function retrieves the adapter information of all OS-known adapters in the
system. OS-known adapters can include adapters that are physically present in the
system (logical adapters) as well as ones that are no longer present in the system
but are still recognized by the OS.
Supported Platforms:
Linux and Windows(XP, Vista and Windows 7); 32bit and 64bit
Parameters:
[in] iInputSize The size of the lpInfo buffer.
[out] lpInfo The pointer to the buffer containing the retrieved adapter information.
Returns:
If the function succeeds, the return value is ADL_OK. Otherwise the return value is an ADL error code. Result Codes
Remarks:
This API take a fixed-size output array. For dynamic-size output, use ADL_Adapter_AdapterInfoX2_Get function.
adl_structures.pas文件将AdapterInfo定义如下：
类型
The adl_structures.pas file defines AdapterInfo as follows: type
AdapterInfo = record
iSize : integer;
iAdapterIndex : integer;
strUDID : array [0..ADL_MAX_PATH] of char;
iBusNumber : integer;
iDeviceNumber : integer;
iFunctionNumber : integer;
iVendorID : integer;
strAdapterName : array [0..ADL_MAX_PATH] of char;
strDisplayName : array [0..ADL_MAX_PATH] of char;
iPresent : integer;
{$IFDEF MSWINDOWS}
iExist : Integer;
strDriverPath : array [0..ADL_MAX_PATH-1] of Char;
strDriverPathExt : array[0..ADL_MAX_PATH-1] of Char;
strPNPString : array[0..ADL_MAX_PATH-1] of char;
iOSDisplayIndex : integer;
{$ENDIF} { (_WIN32) || (_WIN64) }
end;
LPAdapterInfo = ^AdapterInfo;
我为每个函数声明了一种类型：
I declared a type for each function this way:
type
TADL_MAIN_CONTROL_CREATE = function(param1 : ADL_MAIN_MALLOC_CALLBACK; param2 : integer) : integer; cdecl;
TADL_MAIN_CONTROL_DESTROY = function : integer; cdecl;
TADL_OVERDRIVE5_TEMPERATURE_GET = function (iAdapterIndex, iThermalControllerIndex : integer; var lpTemperature : ADLTemperature) : integer; cdecl;
TADL_OVERDRIVE5_FANSPEED_GET = function (iAdapterIndex, iThermalControllerIndex: integer; var lpFanSpeedValue: ADLFanSpeedValue): integer; cdecl;
TADL_ADAPTER_NUMBEROFADAPTERS_GET = function (var lpNumAdapters: integer): integer; cdecl;
TADL_ADAPTER_ACTIVE_GET = function(iAdapterIndex: integer; var lpStatus: Integer): Integer; cdecl;
TADL_ADAPTER_ADAPTERINFO_GET = function(AInfo : Pointer; iInputSize: Integer): integer; cdecl;{stdcall;}
通过以下方式创建变量：
Created variables this way:
var
ADL_Overdrive5_Temperature_Get : TADL_OVERDRIVE5_TEMPERATURE_GET;
ADL_Adapter_NumberOfAdapters_Get : TADL_ADAPTER_NUMBEROFADAPTERS_GET;
ADL_Adapter_Active_Get : TADL_ADAPTER_ACTIVE_GET;
ADL_Adapter_AdapterInfo_Get : TADL_ADAPTER_ADAPTERINFO_GET;
ADL_Overdrive5_FanSpeed_Get : TADL_OVERDRIVE5_FANSPEED_GET;
temperature : ADLTemperature;
fanspeed : ADLFanSpeedValue;
numGFX, numActiveGFX : Integer;
GFXActive : Integer;
x, size : integer;
ADL_Info : AdapterInfo;
ADL_PInfo : LPAdapterInfo;
ADL_AInfo : Array of AdapterInfo;
ADL_Result : Integer;
ActiveAdapters : Array of Integer;
Addr : Pointer;
strPresent : String;
通过以下方式链接到外部功能：
Linking to external functions this way:
ADL_Adapter_NumberOfAdapters_Get := GetProcAddress(hDLL, 'ADL_Adapter_NumberOfAdapters_Get');
ADL_Overdrive5_Temperature_Get := GetProcAddress(hDLL, 'ADL_Overdrive5_Temperature_Get');
ADL_Adapter_Active_Get := GetProcAddress(hDLL, 'ADL_Adapter_Active_Get');
ADL_Adapter_AdapterInfo_Get := GetProcAddress(hDLL, 'ADL_Adapter_AdapterInfo_Get');
ADL_Overdrive5_Fanspeed_Get := GetProcAddress(hDLL, 'ADL_Overdrive5_FanSpeed_Get');
然后我尝试将数据放入数组和内存缓冲区。两者都返回完全相同的数据，但无效。请注意，其他函数正在运行或返回有效错误，例如驱动程序不支持。
I then try to get the data into an array and into a memory buffer. Both return the exact same data but its not valid. Note that the other functions are working or return valid errors such as "not supported by driver".
Array：
if Assigned(ADL_Adapter_AdapterInfo_Get) then
begin
//*** Array (delphi way)
Setlength(ADL_AInfo, numGFX);
Addr := ADL_AInfo;
size := sizeof(AdapterInfo)*numGFX;
try
ADL_Result := ADL_Adapter_AdapterInfo_Get(Addr, size);
If ADL_Result = ADL_OK then
begin
for x := 0 to numGFX-1 do
begin
//using a delphi array
Memo1.Lines.Add('Vender ID for Adapter Index '+IntToStr(ADL_AInfo[x].iAdapterIndex)+' is '+IntToStr(ADL_AInfo[x].iVendorID));
Memo1.Lines.Add('Device Number for Adapter Index '+IntToStr(ADL_AInfo[x].iAdapterIndex)+' is '+IntToStr(ADL_AInfo[x].iDeviceNumber));
Memo1.Lines.Add('Adatper Name for Adapter Index '+IntToStr(ADL_AInfo[x].iAdapterIndex)+' is '+ADL_AInfo[x].strAdapterName);
Memo1.Lines.Add('Display Name for Adapter Index '+IntToStr(ADL_AInfo[x].iAdapterIndex)+' is '+ADL_aInfo[x].strDisplayName);
if ADL_AInfo[x].iPresent = 0 then strPresent := 'not present' else strPresent := 'present';
Memo1.Lines.Add('Adapter Index '+IntToStr(ADL_AInfo[x].iAdapterIndex)+' is '+strPresent);
end;
end
else
Memo1.Lines.Add('Error : '+IntToStr(ADL_Result));
finally
end;
end;
内存缓冲区：
if Assigned(ADL_Adapter_AdapterInfo_Get) then
begin
//*** Pointer (c lookalike)
size := sizeof(AdapterInfo)*numGFX;
//GetMem(ADL_PInfo, size);
ADL_PInfo := AllocMem(sizeof(AdapterInfo) * numGFX);
try
ADL_Result := ADL_Adapter_AdapterInfo_Get(ADL_PInfo, size);
If ADL_Result = ADL_OK then
begin
for x := 0 to numGFX-1 do
begin
//using getmem with a pointer to a record
Memo1.Lines.Add('Vender ID for Adapter Index '+IntToStr(ADL_PInfo.iAdapterIndex)+' is '+IntToStr(ADL_PInfo.iVendorID));
Memo1.Lines.Add('Device Number for Adapter Index '+IntToStr(ADL_PInfo.iAdapterIndex)+' is '+IntToStr(ADL_PInfo.iDeviceNumber));
Memo1.Lines.Add('Adatper Name for Adapter Index '+IntToStr(ADL_PInfo.iAdapterIndex)+' is '+ADL_PInfo.strAdapterName);
Memo1.Lines.Add('Display Name for Adapter Index '+IntToStr(ADL_PInfo.iAdapterIndex)+' is '+ADL_PInfo.strDisplayName);
if ADL_PInfo.iPresent = 0 then strPresent := 'not present' else strPresent := 'present';
Memo1.Lines.Add('Adapter Index '+IntToStr(ADL_PInfo.iAdapterIndex)+' is '+strPresent);
inc(ADL_Pinfo);
end;
end
else
Memo1.Lines.Add('Error : '+IntToStr(ADL_Result));
finally
// ZeroMemory(ADL_PInfo, size);
end;
end;
推荐答案
解决方案很简单。
- 下载PRAXIS库
- 在文件 adl_structures.pas中查找所有Char实例，并将其更改为AnsiChar
- 在同一文件中，查找 [0..MAX_PATH]的所有实例并将其更改为 [0..MAX_PATH-1]
上面获得指向DLL中的函数的指针并提取数据的代码是有效的并且可以正常工作
The code above to get the pointers to the functions in the DLL and extract data is valid and works fine
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