graph.c File Reference

#include <kernel.h>
#include <gs_privileged.h>
#include <graph.h>

Include dependency graph for graph.c:

Go to the source code of this file.

Functions
int	graph_initialize (int fbp, int width, int height, int psm, int x, int y)
int	graph_add_vsync_handler (int(*vsync_callback)())
void	graph_remove_vsync_handler (int callback_id)
int	graph_get_field (void)
void	graph_wait_hsync (void)
int	graph_check_vsync (void)
void	graph_start_vsync (void)
void	graph_wait_vsync (void)

Function Documentation

graph_add_vsync_handler()

int graph_add_vsync_handler

(

int(*)()

vsync_callback

)

Add a vsync interrupt handler

Definition at line 29 of file graph.c.

{
 
        int callback_id;
 
        DIntr();
 
        callback_id = AddIntcHandler(INTC_VBLANK_S, vsync_callback, -1);
 
        EnableIntc(INTC_VBLANK_S);
 
        EIntr();
 
        return callback_id;
 
}

References AddIntcHandler(), DIntr(), EIntr(), EnableIntc(), and INTC_VBLANK_S.

graph_check_vsync()

int graph_check_vsync

(

void

)

Checks if a vertical sync event is currently generated.

Definition at line 85 of file graph.c.

{
 
        return (*GS_REG_CSR & 8);
 
}

References GS_REG_CSR.

graph_get_field()

int graph_get_field

(

void

)

Definition at line 59 of file graph.c.

{
 
        // Return the currently displayed field.
        if (*GS_REG_CSR & (1 << 13))
        {
 
                return GRAPH_FIELD_ODD;
 
        }
 
        return GRAPH_FIELD_EVEN;
 
}

References GRAPH_FIELD_EVEN, GRAPH_FIELD_ODD, and GS_REG_CSR.

graph_initialize()

int graph_initialize	(	int	fbp,
		int	width,
		int	height,
		int	psm,
		int	x,
		int	y
	)

Initializes a default NTSC/PAL mode with default settings.

Definition at line 6 of file graph.c.

{
 
        int mode = graph_get_region();
 
        // Set a default interlaced video mode with flicker filter.
        graph_set_mode(GRAPH_MODE_INTERLACED, mode, GRAPH_MODE_FIELD, GRAPH_ENABLE);
 
        // Set the screen up
        graph_set_screen(0,0,width,height);
 
        // Set black background
        graph_set_bgcolor(0,0,0);
 
        graph_set_framebuffer_filtered(fbp,width,psm,x,y);
 
        graph_enable_output();
 
        // End function.
        return 0;
 
}

References GRAPH_ENABLE, graph_enable_output(), graph_get_region(), GRAPH_MODE_FIELD, GRAPH_MODE_INTERLACED, graph_set_bgcolor(), graph_set_framebuffer_filtered(), graph_set_mode(), graph_set_screen(), mode, x, and y.

Referenced by draw_init_env(), init_gs(), and main().

graph_remove_vsync_handler()

void graph_remove_vsync_handler

(

int

callback_id

)

Remove a vsync interrupt handler

Definition at line 46 of file graph.c.

{
 
        DIntr();
 
        DisableIntc(INTC_VBLANK_S);
 
        RemoveIntcHandler(INTC_VBLANK_S, callback_id);
 
        EIntr();
 
}

References DIntr(), DisableIntc(), EIntr(), INTC_VBLANK_S, and RemoveIntcHandler().

graph_start_vsync()

void graph_start_vsync

(

void

)

Starts a vertical sync event and returns immediately.

Definition at line 92 of file graph.c.

{
 
        *GS_REG_CSR |= *GS_REG_CSR & 8;
 
}

References GS_REG_CSR.

graph_wait_hsync()

void graph_wait_hsync

(

void

)

Starts a horizontal sync event and waits

Definition at line 74 of file graph.c.

{
 
        // Initiate hsync interrupt
        *GS_REG_CSR |= *GS_REG_CSR & 4;
 
        // Wait for hsync interrupt to be generated.
        while (!(*GS_REG_CSR & 4));
 
}

References GS_REG_CSR.

graph_wait_vsync()

void graph_wait_vsync

(

void

)

Starts a vertical sync event and waits.

Definition at line 99 of file graph.c.

{
 
        // Initiate vsync interrupt.
        *GS_REG_CSR |= *GS_REG_CSR & 8;
 
        // Wait for vsync interrupt to be generated.
        while (!(*GS_REG_CSR & 8));
 
}

References GS_REG_CSR.

Referenced by main(), render(), and run_demo().