87 lines
2.4 KiB
C
87 lines
2.4 KiB
C
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#ifndef __LIB_GFX_H
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#define __LIB_GFX_H
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#include <sys/types.h>
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// gfx library
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// different graphics formats
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typedef enum {
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GFX_FORMAT_RGB_565,
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GFX_FORMAT_ARGB_8888,
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GFX_FORMAT_RGB_x888,
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GFX_FORMAT_MAX
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} gfx_format;
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#define MAX_ALPHA 255
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/**
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* @brief Describe a graphics drawing surface
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*
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* The gfx_surface object represents a framebuffer that can be rendered
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* to. Elements include a pointer to the actual pixel memory, its size, its
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* layout, and pointers to basic drawing functions.
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*
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* @ingroup graphics
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*/
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typedef struct gfx_surface {
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void *ptr;
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bool free_on_destroy;
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gfx_format format;
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uint width;
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uint height;
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uint stride;
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uint pixelsize;
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size_t len;
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uint alpha;
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// function pointers
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void (*copyrect)(struct gfx_surface *, uint x, uint y, uint width, uint height, uint x2, uint y2);
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void (*fillrect)(struct gfx_surface *, uint x, uint y, uint width, uint height, uint color);
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void (*putpixel)(struct gfx_surface *, uint x, uint y, uint color);
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void (*flush)(uint starty, uint endy);
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} gfx_surface;
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// copy a rect from x,y with width x height to x2, y2
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void gfx_copyrect(gfx_surface *surface, uint x, uint y, uint width, uint height, uint x2, uint y2);
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// fill a rect within the surface with a color
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void gfx_fillrect(gfx_surface *surface, uint x, uint y, uint width, uint height, uint color);
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// draw a pixel at x, y in the surface
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void gfx_putpixel(gfx_surface *surface, uint x, uint y, uint color);
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// clear the entire surface with a color
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static inline void gfx_clear(gfx_surface *surface, uint color)
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{
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surface->fillrect(surface, 0, 0, surface->width, surface->height, color);
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if (surface->flush)
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surface->flush(0, surface->height-1);
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}
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// blend between two surfaces
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void gfx_surface_blend(struct gfx_surface *target, struct gfx_surface *source, uint destx, uint desty);
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void gfx_flush(struct gfx_surface *surface);
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void gfx_flush_rows(struct gfx_surface *surface, uint start, uint end);
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// surface setup
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gfx_surface *gfx_create_surface(void *ptr, uint width, uint height, uint stride, gfx_format format);
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// utility routine to make a surface out of a display info
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struct display_info;
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gfx_surface *gfx_create_surface_from_display(struct display_info *);
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// free the surface
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// optionally frees the buffer if the free bit is set
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void gfx_surface_destroy(struct gfx_surface *surface);
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// utility routine to fill the display with a little moire pattern
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void gfx_draw_pattern(void);
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#endif
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