CN101488332A - Screen display accelerated mixing system and method based on WinCE system - Google Patents
Screen display accelerated mixing system and method based on WinCE system Download PDFInfo
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Abstract
The invention provides a screen display accelerating hybrid system based on WinCE system and a method thereof. The system realizes the method of display accelerating hybrid by adding a multilayer controller, the method comprises the following steps: modifying the memory configuration of the system, distributing independent memory space for four display layers respectively, transmitting display data of different types to the corresponding memory space of the four display layers respectively; setting different ALPHA values for the four display layers, mixing ALPHA values by the multilayer controller to synthesize pixel, and controlling the transparent effect display of different display layers after transmitting the data to a display controller. The system and method have the advantages of realizing calculating synthesized pixel without occupying the CPU resource and reaching the purposes of mixing graphics rapidly and presenting transparent display effect.
Description
Technical field
The present invention relates to the screen display technology field, be specifically related to a kind of screen display accelerated commingled system and method based on the WinCE system.
Background technology
Recreation of the prior art is no matter be 2D or 3D, in order to pursue transparent effect of shadow, usually all can use the Alpha-Blending technology, and ALPHA-BLENDING technology, i.e. transparent effect, when synthetic two or more pixels realize graphic presentation in proportion, present transparent effect.
At present based on the equipment of WinCE system, and based on the Pocket PC of WinCE nuclear, Windows Mobile equipment when realizing transparent display effect, all is to rely on the calculating of CPU to synthesize pixel fully, thereby reaches this effect; And because the method that relies on CPU to calculate synthesize pixel can take more cpu resource, and in embedded device, cpu resource all is very limited, when this effect of application, can reduce machine performance.
There is defective in the prior art practical application, so have much room for improvement.
Summary of the invention
The objective of the invention is, the defective that exists at above-mentioned prior art provides a kind of screen display accelerated commingled system and method based on the WinCE system, solved existing in prior technology and relied on CPU to calculate to synthesize the method for pixel, realized the rapid mixing figure, presented the purpose of transparent effect.
Technical scheme of the present invention is as follows:
A kind of screen display accelerated mixed method based on the WinCE system wherein, comprises the steps:
The memory configurations of A, modification system is respectively a plurality of display layer distributing independent memory space;
B, will have dissimilar video datas and transfer to respectively in the pairing described storage space of described display layer, and, carry out the ALPHA value by multilayer director and mix and transfer data to display controller after synthetic for a plurality of display layers are provided with different ALPHA values;
C, described display controller are controlled transparent effect demonstration between the different display layers.
Described method, wherein, described display layer has four display layers, is respectively: background layer, video layer, graph layer and mouse layer.
Described method, wherein, the processing of the video data in the described multilayer director specifically comprises the steps:
B1, the described multilayer director of initialization give described multilayer director corresponding address register the video memory start address of described four display layers;
B2, transmit the video data of described background layer and mouse layer, transmit the video data of described video layer, transmit the video data of described graph layer by the 3D/2D program by player by display driver;
B3, in described multilayer director, increase the control interface of an I/O passage, the ALPHA value of described 4 display layers is set respectively, the ALPHA value of setting is given in the described multilayer director ALPHA register of four display layer correspondences by described interface;
B4, call described interface, transparent display effect is set by the application program of described four display layers;
The ALPHA value of B5, described four display layers that will be provided with is sent to the pixel mixer respectively, finishes synthetic calculating of mixing of ALPHA value.
Described method, wherein, described interface is the IOCTL interface, is that described four display layers are provided with different ALPHA values by described interface.
Described method, wherein, the scope of described interface ALPHA value is 0～255.
A kind of screen display accelerated commingled system based on the WinCE system, comprise the display controller that links to each other with display, wherein, also comprise a multilayer director that links to each other with described display controller, described multilayer director is used to store the data of different display layers, the different ALPHA value of a plurality of display layers is set, and the data transmission of carrying out after the ALPHA mixing will be synthesized is given apparent controller; Described display controller is used to control the demonstration of transparent effect between the different display layers.
Described system, wherein, described a plurality of display layers are respectively background layers, video layer, four display layer of 3D/2D graph layer and mouse layer, described four display layers are synthesized to respectively in the described multilayer director.
Described system, wherein, described multilayer director also comprises the control interface and the pixel mixer of an I/O passage, described interface is set in the master controller, links to each other with described four display layers respectively; Described interface is used to be provided with transparent effect, and controls the transparent demonstration of different display layers; Described pixel mixer links to each other with interface with described four display layers respectively, is used to carry out synthetic calculating of mixing of ALPHA value.
Described system, wherein, described interface is the IOCTL interface, is used to described four display layers that different ALPHA values is set, the scope of described ALPHA value is 0～255.
The invention has the beneficial effects as follows, the present invention adds a multilayer director on the traditional hardware circuit basis, with display layer virtual be 4 independently display layer synthesize in multilayer director, use the complex functionality of the ALPHA-BLENDING of this multilayer director, realize that transparent effect shows between 4 independent displaying layers, the present invention can not take under the situation of cpu resource fully, realize this transparent display effect, be widely used in the field of transparent display effects such as background broadcast, picture-in-picture.
Description of drawings
Fig. 1 is a system chart of the present invention;
Fig. 2 is a multilayer director inner structure block diagram of the present invention;
Fig. 3 is a display plane hierarchical model synoptic diagram of the present invention.
Embodiment
The invention provides a kind of screen display accelerated commingled system and method based on the WinCE system, clearer, clear and definite for making purpose of the present invention, technical scheme and advantage, below develop simultaneously with reference to accompanying drawing that the present invention is described in more detail for embodiment.
In order to solve prior art existing cpu resource that occupies when the transparent display effect, the problem that the complete machine performance reduces, the present invention has adopted and added a multilayer director on the existing hardware circuit base, with display layer virtual be 4 independently display layers, and dissimilar video datas transferred to 4 respectively independently in the pairing storage space of display layer, use the complex functionality that this multilayer director ALPHA mixes, realize that transparent effect shows between 4 independent displaying layers, in display driver, increase the interface of the IOCTL of a control transparent effect simultaneously, the interface of IOCTL is the control interface of I/O passage, make application layer software can call this interface easily to control various transparent display effect, because the present invention utilizes multilayer director to realize transparent display effect, and do not need to occupy cpu resource, reached the rapid mixing figure, the purpose that presents transparent display effect.As for CPU how with dissimilar display data transmissions to 4 an independent displaying layer, the application of the interface of IOCTL and multilayer director how with 4 independently the data of display layer carry out the technology that synthetic technology that ALPHA mixes etc. is well known to those skilled in the art, do not repeat them here.
System of the present invention shown in the accompanying drawing 1 mainly comprises central processor CPU, internal memory (being the universal memory of system), multilayer director, display controller and LCD screen, central processor CPU links to each other with multilayer director with Installed System Memory, and wherein central processor CPU links to each other by data line with Installed System Memory, and links to each other by control line with multilayer director, be used for dissimilar display data transmissions system being handled and controlling to the multilayer controller;
Multilayer director respectively with internal memory, central processor CPU links to each other with display controller, multilayer director is used to store the data of four display layers, these four display layers are by revising the memory configurations of system, be respectively 4 display layer distributing independent memory space, and four display layers that will have different storage spaces are synthesized in this multilayer director, should synthetic notion mainly be: the memory configurations of at first carrying out system, with 4 display layers distributing independently the memory address of storage space give in the corresponding address register of multilayer director, control different internal memories by multilayer director by DMA (Direct MemoryAccess) mode then, the i.e. occupied and independent memory space of distributing of 4 display layers, with display layer virtual be in the multilayer director 4 independently display layers;
Multilayer director is that four display layers are provided with different ALPHA values, and the data transmission of carrying out then after the ALPHA mixing will be synthesized is given display controller;
Described display controller is used to control the demonstration of transparent effect between the different display layers, and the display graphics that will have different transparent effects at last is presented at the LCD screen.
Fig. 2 is a multilayer director inner structure block diagram, and this multilayer director comprises 4 virtual independent displaying layers, master controller and ALPHA mixer (pixel mixer); Wherein, 4 independent displaying layers are by revising the memory configurations of system, be respectively 4 display layer distributing independent memory space, make 4 display layers occupy different memory headrooms respectively, with 4 display layers independently memory address give in the corresponding address register of multilayer director, be equivalent to is that 4 display layers have distributed 4 groups of registers, pass through DMA (Direct Memory Access by multilayer director, direct memory access (DMA)) mode is controlled the internal storage data of 4 display layers, these 4 display layers comprise background layer respectively, video layer, 3D/2D graph layer and mouse layer; The control interface of an I/O passage of configuration in the master controller, this interface is the IOCTL interface, described interface respectively with background layer, video layer, four display layer of 3D/2D graph layer and mouse layer link to each other, by this interface four ALPHA values that display layer is different are set, set different ALPHA value is given in the ALPHA register of corresponding multilayer director, the ALPHA register is used to store the set different ALPHA value of four display layers, and by the ALPHA value of this interface with the different layers that sets, send different ALPHA Value Datas to the ALPHA mixer respectively with the R8G8B8 format code, the ALPHA mixer is used to finish the synthetic calculating of Alpha-blending (mixing), and the data after will synthesizing are transferred to display controller with the R8G8B8 format code; Behind Alpha-blending (mixing), the figure of its demonstration as shown in Figure 3, be respectively background layer, video layer, 3D/2D graph layer and mouse layer, the difference of ALPHA value that can be by four set display layers is controlled the transparency and the sharpness of four display layers, and wherein each layer of four display layers can take whole screen, can regulate the size of screen as required.
The present invention utilizes said system to adopt screen display accelerated mixed method based on the WinCE system, and its method mainly comprises:
The memory configurations of step 1, modification system is respectively four display layer distributing independent memory space, and four display layers that will have different storage spaces are synthesized in the multilayer director of system;
For realizing above-mentioned 4 independent displaying layers in logic, at first in WinCE BSP (BSP is a plate level support package) to the configuration of config.bib file modification internal memory, be respectively 4 display layer distributing independent memory headrooms as video memory;
Following is that the Memory Allocation of 128M is as follows:
MEMORY
；Name Start Size Type
；----- ---------- -------- ----
；#CFG?Start
DRV_GLOBAL?80000000?00100000?RESERVED
NK 80100000 00F00000 RAMIMAGE
RAM 81000000?06200000?RAM
FRAMEBUFFER?87200000?00200000?RESERVED
LINEARMEMORY?87400000?00400000?RESERVED
BLOCKMEMORY?87800000?00800000?RESERVED
Wherein, FRAMEBUFFER uses as basic video memory, it is the video memory of Background Image (background layer) display layer, LINEARMEMORY is the video memory of Video Image (video layer) display layer, and BLOCKMEMORY is the video memory of 3D/2D Image (graph layer) display layer and Cursor Image (mouse layer) display layer;
Step 2, initialization multilayer director are given the start address of the video memory of above-mentioned 4 display layers in 4 corresponding address registers of multilayer director;
Step 3, dissimilar video datas is transferred to respectively in 4 pairing four storage spaces of display layer, when transmitting the data of these 4 different display layers, the data of Background Image, Cursor Image, finish by the display driver that the WinCE system provides, and Video Image, 3D Image adopt the mode of direct control video memory to finish; Be implemented as follows:
Insert the following function code in the DrvEscape function in the standard display driver code that WinCE provides,
Switch(iEsc)
{
Case?IOCTL_DISP_VIDEO_MEMORY:
Obtain the video memory address of Video Image.
Break；
Case?IOCTL_DISP_3D_MEMORY:
Obtain the video memory address of 3D Image.
Break；
}
The function prototype of DrvEscape is as follows:
ULONG?GPE::DrvEscape(
SURFOBJ*pso，
ULONG iEsc，
ULONG cjIn，
PVOID pvIn，
ULONG cjOut，
PVOID pvOut)
{
return0；
}
(annotate: the DrvEscape function can with reference to the file Platform Builder installation directory under WINCE500 public common oak drivers display GPE gpe.cpp the 76th capable.)
Step 4, four ALPHA values that display layer is different are set, in DISPLAY drives, dispose the IOCTL interface of a control ALPHA-BLENDING effect, the ALPHA value of different display layer aspects is set by this interface, the display resolution that is used for the different display layers of regulating and controlling, wherein, the interface prototype is as follows:
Interface name: SetAlphaBlending
Interface parameters: integer layer, (selection need be provided with the display layer of ALPHA-BLENDING effect, the span of four display layers is from 1～4, respectively corresponding above-mentioned four display layers independently, the layer value that is background layer is 1, the layer value of video layer is 2, the layer value of 3D/2D graph layer be 3 and the layer value of mouse layer be 4);
Boolean type bEnb, (display layer of show or hide layer correspondence being set, 0: hide 1: show);
Integer alpha, (four alpha values that display layer is different are set, and scope is 0～255, and the alpha value is more little, and is transparent more, is worth greatly more, and this layer is clear more).
Interface is realized: according to the different display layers of layer correspondence, the alpha value is given in the alpha register of corresponding multilayer director, multilayer director can be according to the synthetic transparent effect of this alpha value in synthetic each display layer;
In the DrvEscape function that Display drives, insert following function code, realize of the control of Alpha-blending mixed effect from the application layer program to hardware interface, as follows:
Case?IOCTL_DISP_SET_ALPHABLENDING:
{
UINT *Args＝(UINT*)pvIn；
UINT?Layer＝*(Args++)；
UINT?bEnb＝*(Args++)；//Byte?Per?Pixel
UINT?alpha＝*(Args++)；
SetAlphaBlending(Layer，bEnb，alpha)；
}
Break；
Step 5, application layer program are called the IOCTL interface of above-mentioned ALPHA-BLENDING effect as follows, and transparent display effect is set.
HDC?hdc＝GetDC(NULL)；
int?buf[4]＝{layer，bEnb，alpha，0}；
if(ExtEscape(hdc，IOCTL_DISP_SET_ALPHABLENDING，
sizeof(int)*4，(LPCSTR)&buf，0，NULL)＝＝0)
{
}
ReleaseDC(NULL，hdc)；
(annotate: ExtEscape is the interface of the supply that provides of WinCE operating system with routine call, during this function of application call, after the mechanism operation by WinCE operating system, can call the ExtEscape function of above-mentioned Display in driving at last; )
Step 6, set after the different Alpha value of four display layers, by calling the IOCTL interface different video datas is sent in the ALPH mixer in the multilayer director, finish the synthetic calculating of Alpha-blending, and the data transmission after will synthesizing is given display controller;
Its computing method are the computing method of general Alpha-blending, mainly comprise as follows:
Each pixel is by R, G, and three pixels of B are formed, the pixel of supposing ground floor and second layer correspondence position for (R1, G1, B1), (R2, G2, B2), the Alpha value is a, pixel after then synthetic be ((R1*a+R2* (255-a))〉〉 8, ((G1*a+G2* (255-a))〉〉 8, ((B1*a+B2* (255-a))〉〉 8), the technology that concrete detailed calculation procedure is well known to those skilled in the art does not repeat them here.
In sum, because the present invention has increased multilayer director on the traditional hardware circuit basis, by this multilayer director different ALPHA values is carried out hybrid, realized need not taking cpu resource and calculated synthetic pixel, reached the rapid mixing figure, presented the purpose of transparent display effect.
It should be noted that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (9)
1, a kind of screen display accelerated mixed method based on the WinCE system is characterized in that, comprises the steps:
The memory configurations of A, modification system is respectively a plurality of display layer distributing independent memory space;
B, will have dissimilar video datas and transfer to respectively in the pairing described storage space of described display layer, and, carry out the ALPHA value by multilayer director and mix and transfer data to display controller after synthetic for a plurality of display layers are provided with different ALPHA values;
C, described display controller are controlled transparent effect demonstration between the different display layers.
2, method according to claim 1 is characterized in that, described display layer has four display layers, is respectively: background layer, video layer, graph layer and mouse layer.
3, method according to claim 1 and 2 is characterized in that, the processing of the video data in the described multilayer director specifically comprises the steps:
B1, the described multilayer director of initialization give described multilayer director corresponding address register the video memory start address of described four display layers;
B2, transmit the video data of described background layer and mouse layer, transmit the video data of described video layer, transmit the video data of described graph layer by the 3D/2D program by player by display driver;
B3, in described multilayer director, increase the control interface of an I/O passage, the ALPHA value of described 4 display layers is set respectively, the ALPHA value of setting is given in the described multilayer director ALPHA register of four display layer correspondences by described interface;
B4, call described interface, transparent display effect is set by the application program of described four display layers;
The ALPHA value of B5, described four display layers that will be provided with is sent to the pixel mixer respectively, finishes synthetic calculating of mixing of ALPHA value.
4, method according to claim 3 is characterized in that, described interface is the IOCTL interface, is that described four display layers are provided with different ALPHA values by described interface.
5, method according to claim 4 is characterized in that, the scope of described interface ALPHA value is 0～255.
6, a kind of screen display accelerated commingled system based on the WinCE system, comprise the display controller that links to each other with display, it is characterized in that, also comprise a multilayer director that links to each other with described display controller, described multilayer director is used to store the data of different display layers, the different ALPHA value of a plurality of display layers is set, and the data transmission of carrying out after the ALPHA mixing will be synthesized is given display controller; Described display controller is used to control the demonstration of transparent effect between the different display layers.
7, system according to claim 6 is characterized in that, described a plurality of display layers are respectively background layers, video layer, and four display layer of 3D/2D graph layer and mouse layer, described four display layers are synthesized to respectively in the described multilayer director.
8, system according to claim 6 is characterized in that, described multilayer director also comprises the control interface and the pixel mixer of an I/O passage, and described interface is set in the master controller, links to each other with described four display layers respectively; Described interface is used to be provided with transparent effect, and controls the transparent demonstration of different display layers; Described pixel mixer links to each other with interface with described four display layers respectively, is used to carry out synthetic calculating of mixing of ALPHA value.
9, system according to claim 8 is characterized in that, described interface is the IOCTL interface, is used to described four display layers that different ALPHA values is set, and the scope of described ALPHA value is 0～255.
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