Graphics Namespace Reference

Namespaces
	Font

Data Structures
class	Framebuffer

Enumerations
enum	FramebufferMemoryModel { Undefined_FBMM = 0, RGB_FBMM = 1 }

Functions
Framebuffer *	getFramebuffer ()
void	init (Framebuffer *fb)
void	pixel (uint32_t x, uint32_t y, uint32_t color)
void	putrect (uint32_t x, uint32_t y, uint32_t w, uint32_t h, uint32_t color)
void	resetDoubleBuffer ()
void	swap ()

Enumeration Type Documentation

FramebufferMemoryModel

enum Graphics::FramebufferMemoryModel

Enumerator
Undefined_FBMM
RGB_FBMM

Definition at line 16 of file framebuffer.hpp.

                            {
    Undefined_FBMM = 0,
    RGB_FBMM = 1,
};

Function Documentation

getFramebuffer()

Framebuffer * Graphics::getFramebuffer

(

)

Get a pointer to the active framebuffer.

Returns

Framebuffer* Pointer to active framebuffer

Definition at line 81 of file framebuffer.cpp.

{
    return framebuffer;
}

init()

void Graphics::init

(

Framebuffer *

fb

)

Initializes the framebuffer (if available)

Definition at line 32 of file graphics.cpp.

{
    // Get the framebuffer info
    if (!(info = fb))
        return;
    // Ensure valid info is provided
    if (!info->getAddress())
        return;
    // Map in the framebuffer
    Logger::Debug(__func__, "==== MAP FRAMEBUFFER ====");
    Memory::mapKernelRangeVirtual(Memory::Section(
        (uintptr_t)info->getAddress(),
        (uintptr_t)info->getAddress() + (info->getPitch() * info->getHeight())
    ));
    // Alloc the backbuffer
    backbuffer = malloc(info->getPitch() * info->getHeight());
    memcpy(backbuffer, info->getAddress(), info->getPitch() * info->getHeight());
 
    initialized = true;
}

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pixel()

void Graphics::pixel	(	uint32_t	x,
		uint32_t	y,
		uint32_t	color
	)

Draws a pixel at a given coordinate.

Parameters

x	X-axis coordinate
y	Y-axis coordinate
color	Hex color

Definition at line 53 of file graphics.cpp.

{
    // Ensure framebuffer information exists
    if (!initialized)
        return;
    if ((x <= info->getWidth()) && (y <= info->getHeight())) {
        // Special thanks to the SkiftOS contributors.
        uint8_t* pixel = (uint8_t*)backbuffer + (y * info->getPitch()) + (x * info->getPixelWidth());
        // Pixel information
        pixel[0] = (color >> info->getBlueMaskShift()) & 0xff;  // B
        pixel[1] = (color >> info->getGreenMaskShift()) & 0xff; // G
        pixel[2] = (color >> info->getRedMaskShift()) & 0xff;   // R
        // Additional pixel information
        if (info->getPixelWidth() == 4)
            pixel[3] = 0x00;
    }
}

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putrect()

void Graphics::putrect	(	uint32_t	x,
		uint32_t	y,
		uint32_t	w,
		uint32_t	h,
		uint32_t	color
	)

Draws and fills a rectangle of a given width and height, and color at the provided coordinates.

Parameters

x	X-axis coordinate
y	Y-axis coordinate
w	Width
h	Height
color	Hex color

Definition at line 71 of file graphics.cpp.

{
    // Ensure framebuffer information exists
    if (!initialized)
        return;
    for (uint32_t curr_x = x; curr_x <= x + w; curr_x++) {
        for (uint32_t curr_y = y; curr_y <= y + h; curr_y++) {
            // Extremely slow but good for debugging
            pixel(curr_x, curr_y, color);
        }
    }
    // Swap after doing a large operation
    swap();
}

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resetDoubleBuffer()

void Graphics::resetDoubleBuffer

(

)

Fill the backbuffer with '0'.

Definition at line 86 of file graphics.cpp.

{
    if (!initialized)
        return;
    memset(backbuffer, 0, (info->getPitch() * info->getHeight()));
}

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swap()

void Graphics::swap

(

)

Swap the data on backbuffer to memory video buffer and show in the screen.

Definition at line 93 of file graphics.cpp.

{
    if (!initialized)
        return;
    memcpy(info->getAddress(), backbuffer, (info->getPitch() * info->getHeight()));
}

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