graphics.h File Reference

#include "SDL2/SDL.h"

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Macros
#define	GRAPHICS_VERSION   "0.1.0"
	include guard

Functions
struct graphics *	GraphicsInit (char *title, int width, int height, int scale)
	Creates and initializes a new graphics object isntance. More...
void	GraphicsDeinit (struct graphics *graphics)
	De-initializes and frees memory for the given graphics object. More...
void	GraphicsBegin (struct graphics *graphics)
	Initializes the graphics subsystem for drawing routines. More...
void	GraphicsEnd (struct graphics *graphics)
	Prepares the graphics subsystem for presentation, then presents. More...
void	GraphicsClearScreen (struct graphics *graphics, unsigned int color)
	Sets all pixels in the screen to the given color. More...
void	GraphicsTriangleWireframe (struct graphics *graphics, struct triangle triangle, unsigned int color)
	Draw a triangle with the given set of x and y coordinates. More...
void	GraphicsTriangleSolid (struct graphics *graphics, struct triangle triangle, unsigned int color)
	Draw a triangle with the given set of x and y coordinates. More...
void	GraphicsTriangleTextured (struct graphics *graphics, struct triangle tri, struct texture *texture)
	Draw a textured triangle with the given set of x and y coordinates. More...

Detailed Description

Drawing interface to the operating system.

Function Documentation

GraphicsBegin()

void GraphicsBegin

(

struct graphics *

graphics

)

Initializes the graphics subsystem for drawing routines.

Internally locks streaming texture for direct manipulation.

Parameters

[in,out]

graphics

Graphics state to be manipulated

GraphicsClearScreen()

void GraphicsClearScreen	(	struct graphics *	graphics,
		unsigned int	color
	)

Sets all pixels in the screen to the given color.

Parameters

[in,out]	graphics	Graphics state to be manipulated
[in]	color	32-bit color with 8-bits per component: (R,G,B,A)

GraphicsDeinit()

void GraphicsDeinit

(

struct graphics *

graphics

)

De-initializes and frees memory for the given graphics object.

Parameters

[in,out]

graphics

The initialized opcode object to be cleaned and reclaimed

GraphicsEnd()

void GraphicsEnd

(

struct graphics *

graphics

)

Prepares the graphics subsystem for presentation, then presents.

Internally unlocks streaming texture then calls presentation routines.

Parameters

[in,out]

graphics

Graphics state to be manipulated.

GraphicsInit()

struct graphics* GraphicsInit	(	char *	title,
		int	width,
		int	height,
		int	scale
	)

Creates and initializes a new graphics object isntance.

Scale can be specified as a non-negative number. This value is used to multiply both the width and the height and the pixel size of any drawing operations.

For example, specifying a scale of 2 would multiply the width by 2, the height by 2, and every pixel would be 2x2; so the total scale factor ends up being scale^2

Parameters

[in]	title	The title displayed in the window titlebar
[in]	width	Width of the display area of the window, in pixels
[in]	height	Height of the display are of the window, in pixels
[in]	scale	Size and rendering scale, natural number multiple

Returns

The initialized graphics object

GraphicsTriangleSolid()

void GraphicsTriangleSolid	(	struct graphics *	graphics,
		struct triangle	triangle,
		unsigned int	color
	)

Draw a triangle with the given set of x and y coordinates.

Fills the specified polygon with the given color.

Parameters

[in,out]	graphics	Graphics state to be changed
[in]	triangle	The triangle to draw
[in]	color	What color the solid triangle should be rendered with

See also

Source: http://www.sunshine2k.de/coding/java/TriangleRasterization/TriangleRasterization.html

GraphicsTriangleTextured()

void GraphicsTriangleTextured	(	struct graphics *	graphics,
		struct triangle	tri,
		struct texture *	texture
	)

Draw a textured triangle with the given set of x and y coordinates.

Fills the specified polygon with the given texture.

Parameters

[in,out]	graphics	Graphics state to be changed
[in]	tri	The triangle to draw
[in]	texture	What texture to sample while drawing the solid triangle

See also

Source: https://github.com/OneLoneCoder/videos/blob/master/OneLoneCoder_olcEngine3D_Part4.cpp

GraphicsTriangleWireframe()

void GraphicsTriangleWireframe	(	struct graphics *	graphics,
		struct triangle	triangle,
		unsigned int	color
	)

Draw a triangle with the given set of x and y coordinates.

Only draws the lines, doesn't fill the polygon.

Parameters

[in,out]	graphics	Graphics state to be changed
[in]	triangle	The triangle to draw
[in]	color	What color the wireframe should be rendered with