lg_background.c File Reference

Functions
zboolean	lg_bg_new (const char *path, int scale_x, int scale_y)
zboolean	lg_bg_draw (int shift_x, int shift_y)
void	lg_bg_clear (uint8_t red, uint8_t green, uint8_t blue)
void	lg_bg_clear_full (uint8_t red, uint8_t green, uint8_t blue, uint8_t alpha, GLbitfield mask)
zboolean	lg_bg_free ()
void	lg_bg_info ()
zboolean	lg_read_and_render_screen_back ()

Detailed Description

 === Draw background, and these sorts of things ===

 So far:
 - Background is unique
 - background texture is env->bg_uniq_tex

Function Documentation

lg_bg_new()

zboolean lg_bg_new	(	const char *	path,
		int	scale_x,
		int	scale_y
	)

Load background texture with scaling

Parameters

scale_x
scale_y
path	Path to image file

Returns

TRUE if OK, FALSE otherwise

lg_bg_draw()

zboolean lg_bg_draw	(	int	shift_x,
		int	shift_y
	)

Draw background with shifting

Parameters

shift_x
shift_y
path	Path to image file

Returns

TRUE if OK, FALSE otherwise

lg_bg_clear()

void lg_bg_clear	(	uint8_t	red,
		uint8_t	green,
		uint8_t	blue
	)

Clear background with RGB color

NOTE: if followed by lg_swap_fb() without delay, and if a complete swap is needed, you may want to use glFinish() afterwards

Parameters

red
green
blue

lg_bg_clear_full()

void lg_bg_clear_full	(	uint8_t	red,
		uint8_t	green,
		uint8_t	blue,
		uint8_t	alpha,
		GLbitfield	mask
	)

Clear background with RGBA colors and mask

NOTE: if followed by lg_swap_fb() without delay, and if a complete swap is needed, you may want to use glFinish() afterwards

GLbitfield is 32-bit

Parameters

red
green
blue
alpha
mask	Bitwise OR of GL_COLOR_BUFFER_BIT, GL_DEPTH_BUFFER_BIT, GL_STENCIL_BUFFER_BIT

lg_bg_free()

zboolean lg_bg_free

(

)

Free background texture

lg_bg_info()

void lg_bg_info

(

)

Print out background texture info

lg_read_and_render_screen_back()

zboolean lg_read_and_render_screen_back

(

)

(Self-explanatory enough)

WARNING: Doesn't swap framebuffer

Returns

TRUE if OK, FALSE otherwise