Fast Models Reference Manual - ARM Information Center

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Peripheral and Interface Components In addition to the public method defined in VisRegion, this class defines the following: VisRasterLayout const *lock() Locks the region for client rendering. The VisRasterLayout structure is described elsewhere. See Struct VisRasterLayout. While the buffer is locked, the client can modify the pixel data for the buffer. You must not call the methods writeText() and renderBitmap() while the buffer is locked. void unlock() This releases the lock on the render buffer, allowing the buffer to be updated on screen. void update(int left, int top, unsigned int width, unsigned int height) This causes the specified rectangle to be drawn to the GUI. int writeText(const char *text, int x, int y) This renders the given ASCII text onto an unlocked VisRenderRegion. The return value is the x co-ordinate of the end of the string. The default font is 8 pixels high, and cannot be changed. void renderBitmap(VisBitmap *bitmap, int x, int y) Draws a bitmap onto an unlocked VisRenderRegion. Struct VisRasterLayout The VisRasterLayout struct defines the layout of the pixel data in a frame-buffer. The lock() method of the LCD protocol expects to be given a pointer to this structure. You can generate a suitable instance by calling VisRasterRegion::lock(). The structure contains the following fields: uint8_t *buffer This points to the buffer for the rasterized pixel data. The controller can write pixels into this buffer, but must stick within the bounds specified by the width and height. uint32_t pitch The number of bytes between consecutive raster lines in the pixel data. This can be greater than the number of bytes per line. uint32_t width The width, in pixels, of the render area. This value can be less than the width requested by the LCD controller when it called lock(). uint32_t height The height, in pixels, of the render area. This value can be less than the height requested by the LCD controller when it called lock(). VisPixelFormat format This structure defines the format of the pixel data in the raster buffer. bool changed This is set to true if the pixel format or buffer size has changed since the previous call to lock(). <strong>ARM</strong> DUI 0423J Copyright © 2008-2011 <strong>ARM</strong>. All rights reserved. 5-155 ID051811 Non-Confidential
Peripheral and Interface Components Pixel data is represented as a one-dimensional array of bytes. The top-left pixel is pointed to by the buffer member. Each pixel takes up a number of bytes, given by format.pbytes. The pixel at location (x, y) is stored in the memory bytes starting at buffer[y * pitch + x * format.pbytes]. Struct VisPixelFormat The VisPixelFormat struct specifies the format of pixel data within the buffer. The members are: uint32_t rbits, gbits, bbits The number of bits per color channel. uint32_t roff, goff, boff The offset within the pixel data value for the red/green/blue channels. uint32_t pbytes The size of a single pixel, in bytes. format.pbytes specifies the number of bytes that make up the data for a single pixel. These bytes represent a single pixel value, stored in host-endian order. The pixel value contains a number of the form (R
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Fast Models Version 6.1 Reference M
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Contents Fast Models Reference Manu
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Preface This preface introduces the
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Preface Typographical conventions T
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Preface Feedback ARM welcomes feedb
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Introduction 1.1 About the componen
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Accuracy and Functionality 2.1 Mode
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Accuracy and Functionality 2.2.2 Pe
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Accuracy and Functionality 2. For a
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Accuracy and Functionality Fast Mod
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Signaling and Clocking Protocols 3.
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Signaling and Clocking Protocols 3.
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Signaling and Clocking Protocols Pa
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Signaling and Clocking Protocols Ve
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Chapter 4 Processor Components This
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Processor Components 4.2 ARMCortexA
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Processor Components InstructionCou
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Processor Components c. This is a m
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Processor Components Table 4-4 ARMC
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Processor Components 4.3.9 Library
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Processor Components a. The ase-pre
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Processor Components 4.4.8 Performa
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Processor Components 4.5.3 Paramete
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Processor Components The debugger m
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Processor Components 4.6.1 Ports Ta
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Processor Components Table 4-13 ARM
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Processor Components 4.6.5 Caches T
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Processor Components 4.7.8 Performa
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Processor Components Name Port Prot
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Processor Components b. Currently i
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Processor Components 4.9 ARMCortexR
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Processor Components 4.9.9 Library
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Processor Components Name Port prot
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Processor Components The debugger m
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Processor Components 4.11 ARMCortex
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Processor Components 4.12 ARMv7A -
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Processor Components pwrctli[0-3] V
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Processor Components Table 4-29 Pro
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Processor Components Cache geometry
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Processor Components Note In the vi
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Processor Components Message config
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Processor Components All entries in
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Processor Components 4.13.3 Paramet
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Processor Components Memory The ARM
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Processor Components Memory The ARM
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Processor Components 4.15.5 Debug f
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Processor Components 4.16 ARM926CT
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Processor Components Registers All
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Processor Components • Data/Instr
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Processor Components DMA DMA is cur
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Processor Components Table 4-47 Cor
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Peripheral and Interface Components
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Emulation Baseboard Model: Platform
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Microcontroller Prototyping System:
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AEM ARMv7-A specifics A.1 Boundary
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AEM ARMv7-A specifics When paramete
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AEM ARMv7-A specifics When stepping
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AEM ARMv7-A specifics A.2 Debug arc
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AEM ARMv7-A specifics A.3 IMPLEMENT
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AEM ARMv7-A specifics A.4 Trace The
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Glossary DSR DTR EB GIC GPIO I/O KM
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