Difference between revisions of "Unit TFT Framebuffer"
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=== Function declarations === | === Function declarations === | ||
Revision as of 02:29, 30 December 2016
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Description
Ultibo TFT Framebuffer driver library unit
This is a generic framebuffer device support unit for SPI based TFT screens using common chipsets.
This unit implements the shared functionality that is common to all devices and provides a set of functions that device specific drivers must implement. For each supported device a driver unit is required that implements the SPI communications to initialize the device, setup resolution and color depth as well as refreshing the framebuffer data to the device memory on change.
The resulting device created by the combination of this unit and a device specific driver is registered with Ultibo as a framebuffer device that can be accessed using all of the standard framebuffer API functions.
For examples of drivers that use this support unit see the HX8357D and ILI9340 units.
Constants
TFT_FRAMEBUFFER_* TFT_FRAMEBUFFER_FRAME_RATE_DEFAULT = 20;
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Default frame rate of 20 frames per second refresh |
Type definitions
To be documented
Public variables
None defined
Function declarations
TFT framebuffer functions
function TFTFramebufferAllocate(Framebuffer:PFramebufferDevice; Properties:PFramebufferProperties):LongWord;
| Note | Not intended to be called directly by applications, use FramebufferDeviceAllocate instead |
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function TFTFramebufferRelease(Framebuffer:PFramebufferDevice):LongWord;
| Note | Not intended to be called directly by applications, use FramebufferDeviceRelease instead |
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function TFTFramebufferMark(Framebuffer:PFramebufferDevice; X,Y,Width,Height,Flags:LongWord):LongWord;
| Note | Not intended to be called directly by applications, use FramebufferDeviceMark instead. Marks full lines only, X and Width are ignored for TFT Framebuffer. |
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function TFTFramebufferCommit(Framebuffer:PFramebufferDevice; Address,Size,Flags:LongWord):LongWord;
| Note | Not intended to be called directly by applications, use FramebufferDeviceCommit instead |
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function TFTFramebufferSetProperties(Framebuffer:PFramebufferDevice; Properties:PFramebufferProperties):LongWord;
| Note | Not intended to be called directly by applications, use FramebufferDeviceSetProperties instead |
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procedure TFTFramebufferUpdateDisplay(Framebuffer:PTFTFramebuffer);
| Note | Not intended to be called directly by applications |
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