diff --git a/src/fb.c b/src/fb.c index 85d5ae3..04773c2 100644 --- a/src/fb.c +++ b/src/fb.c @@ -2,10 +2,12 @@ #include #include "mem.h" -static uint32_t * fb; -static uint32_t fb_width; -static uint32_t fb_height; -static uint32_t fb_pitch; +static struct { + uint32_t * addr; + uint32_t width; + uint32_t height; + uint32_t pitch; +} fb; static inline uint32_t build_pixel(uint8_t r, uint8_t g, uint8_t b) { @@ -14,31 +16,41 @@ static inline uint32_t build_pixel(uint8_t r, uint8_t g, uint8_t b) static inline void fb_set_pixel(int x, int y, uint8_t r, uint8_t g, uint8_t b) { - fb[fb_pitch * y / 4u + x] = build_pixel(r, g, b); + fb.addr[fb.pitch * y / 4u + x] = build_pixel(r, g, b); } static void fb_clear(void) { - memset32(fb, 0x002C55u, fb_pitch * fb_height / 4u); + memset32(fb.addr, 0x002C55u, fb.pitch * fb.height / 4u); } void fb_init(uint32_t * addr, uint32_t width, uint32_t height, uint32_t pitch) { - fb = addr; - fb_width = width; - fb_height = height; - fb_pitch = pitch; + fb.addr = addr; + fb.width = width; + fb.height = height; + fb.pitch = pitch; fb_clear(); } bool fb_ready(void) { - return fb != NULL; + return fb.addr != NULL; +} + +uint32_t fb_width(void) +{ + return fb.width; +} + +uint32_t fb_height(void) +{ + return fb.height; } void fb_blend_alpha8(const uint8_t * bitmap, int width, int height, int pitch, int x, int y, uint8_t r, uint8_t g, uint8_t b) { - if (((x + width) <= 0) || (x >= (int)fb_width) || ((y + height) <= 0) || (y >= (int)fb_height)) + if (((x + width) <= 0) || (x >= (int)fb.width) || ((y + height) <= 0) || (y >= (int)fb.height)) { return; } @@ -54,15 +66,15 @@ void fb_blend_alpha8(const uint8_t * bitmap, int width, int height, int pitch, i bitmap += ((-y) * pitch); y = 0; } - if ((x + width) > (int)fb_width) + if ((x + width) > (int)fb.width) { - width = (int)fb_width - x; + width = (int)fb.width - x; } - if ((y + height) > (int)fb_height) + if ((y + height) > (int)fb.height) { - height = (int)fb_height - y; + height = (int)fb.height - y; } - uint32_t * target = &fb[fb_pitch * y / 4u + x]; + uint32_t * target = &fb.addr[fb.pitch * y / 4u + x]; for (int row = 0; row < height; row++) { for (int col = 0; col < width; col++) @@ -83,17 +95,17 @@ void fb_blend_alpha8(const uint8_t * bitmap, int width, int height, int pitch, i target[col] = pixel; } bitmap += pitch; - target += (fb_pitch / 4u); + target += (fb.pitch / 4u); } } void fb_fill(int x, int y, int width, int height, uint8_t r, uint8_t g, uint8_t b) { - uint32_t * target = &fb[fb_pitch * y / 4u + x]; + uint32_t * target = &fb.addr[fb.pitch * y / 4u + x]; uint32_t pixel = build_pixel(r, g, b); for (int row = 0; row < height; row++) { memset32(target, pixel, width); - target += fb_pitch / 4u; + target += fb.pitch / 4u; } } diff --git a/src/fb.h b/src/fb.h index 4a2cf7a..00dbdcb 100644 --- a/src/fb.h +++ b/src/fb.h @@ -6,6 +6,8 @@ void fb_init(uint32_t * addr, uint32_t width, uint32_t height, uint32_t pitch); bool fb_ready(void); +uint32_t fb_width(void); +uint32_t fb_height(void); void fb_blend_alpha8(const uint8_t * bitmap, int width, int height, int pitch, int x, int y, uint8_t r, uint8_t g, uint8_t b); void fb_fill(int x, int y, int width, int height, uint8_t r, uint8_t g, uint8_t b);