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Diffstat (limited to 'src/lib/libkogata/draw.c')
-rw-r--r--src/lib/libkogata/draw.c148
1 files changed, 138 insertions, 10 deletions
diff --git a/src/lib/libkogata/draw.c b/src/lib/libkogata/draw.c
index 14f1dcf..4e5dcf2 100644
--- a/src/lib/libkogata/draw.c
+++ b/src/lib/libkogata/draw.c
@@ -112,7 +112,7 @@ color_t g_color_rgb(fb_t *f, uint8_t r, uint8_t g, uint8_t b) {
return 0; // unknown?
}
-// ---- Plot
+// ---- Drawing functions
static inline void g_plot24(uint8_t* p, color_t c) {
p[0] = c & 0xFF;
@@ -120,7 +120,11 @@ static inline void g_plot24(uint8_t* p, color_t c) {
p[2] = (c >> 16) & 0xFF;
}
-void g_plot(fb_t *fb, int x, int y, color_t c) {
+// # Plot #
+
+inline void g_plot(fb_t *fb, int x, int y, color_t c) {
+ if (x < 0 || y < 0 || x >= fb->geom.width || y >= fb->geom.height) return;
+
if (fb->geom.bpp == 8) {
fb->data[y * fb->geom.pitch + x] = (c & 0xFF);
} else if (fb->geom.bpp == 15 || fb->geom.bpp == 16) {
@@ -134,7 +138,22 @@ void g_plot(fb_t *fb, int x, int y, color_t c) {
}
}
-void g_hline(fb_t *fb, int x, int y, int w, color_t c) {
+inline void g_region_plot(fb_t *fb, fb_region_t *reg, int x, int y, color_t c) {
+ if (x < 0 || y < 0 || x >= reg->w || y >= reg->h) return;
+ g_plot(fb, x + reg->x, y + reg->y, c);
+}
+
+
+// # Horizontal line #
+
+inline void g_hline(fb_t *fb, int x, int y, int w, color_t c) {
+ if (x < 0) w = w + x, x = 0;
+ if (x >= fb->geom.width) return;
+ if (x + w < 0) return;
+ if (x + w > fb->geom.width) w = fb->geom.width - x;
+ if (y < 0 || y >= fb->geom.height) return;
+ if (w <= 0) return;
+
if (fb->geom.bpp == 8) {
for (int u = x; u < x + w; u++) {
fb->data[y * fb->geom.pitch + u] = (c & 0xFF);
@@ -151,12 +170,33 @@ void g_hline(fb_t *fb, int x, int y, int w, color_t c) {
} else if (fb->geom.bpp == 32) {
for (int u = x; u < x + w; u++) {
uint32_t *p = (uint32_t*)(fb->data + y * fb->geom.pitch + 4 * u);
- *p = c;
+ *p = c | 0xFF000000; // alpha = 0xFF
}
}
}
-void g_vline(fb_t *fb, int x, int y, int h, color_t c) {
+inline void g_region_hline(fb_t *fb, fb_region_t *reg, int x, int y, int w, color_t c) {
+ if (x < 0) w = w + x, x = 0;
+ if (x >= reg->w) return;
+ if (x + w < 0) return;
+ if (x + w > reg->w) w = reg->w - x;
+ if (y < 0 || y >= reg->h) return;
+ if (w <= 0) return;
+
+ g_hline(fb, reg->x + x, reg->y + y, w, c);
+}
+
+
+// # Vertical line #
+
+inline void g_vline(fb_t *fb, int x, int y, int h, color_t c) {
+ if (y < 0) h = h + y, y = 0;
+ if (y >= fb->geom.height) return;
+ if (y + h < 0) return;
+ if (y + h > fb->geom.width) h = fb->geom.height - y;
+ if (x < 0 || x >= fb->geom.width) return;
+ if (h <= 0) return;
+
if (fb->geom.bpp == 8) {
for (int v = y; v < y + h; v++) {
fb->data[v * fb->geom.pitch + x] = (c & 0xFF);
@@ -178,10 +218,31 @@ void g_vline(fb_t *fb, int x, int y, int h, color_t c) {
}
}
+inline void g_region_vline(fb_t *fb, fb_region_t *reg, int x, int y, int h, color_t c) {
+ if (y < 0) h = h + y, y = 0;
+ if (y >= reg->h) return;
+ if (y + h < 0) return;
+ if (y + h > reg->h) h = reg->h - y;
+ if (x < 0 || x >= reg->h) return;
+ if (h <= 0) return;
+
+ g_vline(fb, reg->x + x, reg->y + y, h, c);
+}
+
+
+// # Line #
+
void g_line(fb_t *fb, int x1, int y1, int x2, int y2, color_t c) {
// TODO
}
+void g_region_line(fb_t *fb, fb_region_t *reg, int x1, int y1, int x2, int y2, color_t c) {
+ // TODO
+}
+
+
+// # Rectangle #
+
void g_rect(fb_t *fb, int x, int y, int w, int h, color_t c) {
g_hline(fb, x, y, w, c);
g_hline(fb, x, y+h-1, w, c);
@@ -189,7 +250,25 @@ void g_rect(fb_t *fb, int x, int y, int w, int h, color_t c) {
g_vline(fb, x+w-1, y, h, c);
}
+void g_region_rect(fb_t *fb, fb_region_t *reg, int x, int y, int w, int h, color_t c) {
+ g_region_hline(fb, reg, x, y, w, c);
+ g_region_hline(fb, reg, x, y+h-1, w, c);
+ g_region_vline(fb, reg, x, y, h, c);
+ g_region_vline(fb, reg, x+w-1, y, h, c);
+}
+
+
+// # Filled rectangle #
+
void g_fillrect(fb_t *fb, int x, int y, int w, int h, color_t c) {
+ if (x < 0) w = w + x, x = 0;
+ if (y < 0) h = h + y, y = 0;
+
+ if (x + w > fb->geom.width) w = fb->geom.width - x;
+ if (y + h > fb->geom.height) h = fb->geom.height - y;
+
+ if (w <= 0 || h <= 0) return;
+
if (fb->geom.bpp == 8) {
for (int v = y; v < y + h; v++) {
for (int u = x; u < x + w; u++) {
@@ -219,22 +298,43 @@ void g_fillrect(fb_t *fb, int x, int y, int w, int h, color_t c) {
}
}
-void g_rectregion(fb_t *fb, fb_region_t reg, color_t c) {
- g_rect(fb, reg.x, reg.y, reg.w, reg.h, c);
-}
+void g_region_fillrect(fb_t *fb, fb_region_t *reg, int x, int y, int w, int h, color_t c) {
+ if (x < 0) w = w + x, x = 0;
+ if (y < 0) h = h + y, y = 0;
+
+ if (x + w > reg->w) w = reg->w - x;
+ if (y + h > reg->h) h = reg->h - y;
-void g_fillregion(fb_t *fb, fb_region_t reg, color_t c) {
- g_fillrect(fb, reg.x, reg.y, reg.w, reg.h, c);
+ if (w <= 0 || h <= 0) return;
+
+ g_fillrect(fb, x + reg->x, y + reg->y, w, h, c);
}
+
+// # Circle #
+
void g_circle(fb_t *fb, int cx, int cy, int r, color_t c) {
// TODO
}
+void g_region_circle(fb_t *fb, fb_region_t *reg, int cx, int cy, int r, color_t c) {
+ // TODO
+}
+
+
+// # Filled circle #
+
void g_fillcircle(fb_t *fb, int cx, int cy, int r, color_t c) {
// TODO
}
+void g_region_fillcircle(fb_t *fb, fb_region_t *reg, int cx, int cy, int r, color_t c) {
+ // TODO
+}
+
+
+// # Blit #
+
void g_blit(fb_t *dst, int x, int y, fb_t *src) {
fb_region_t r;
@@ -246,6 +346,17 @@ void g_blit(fb_t *dst, int x, int y, fb_t *src) {
g_blit_region(dst, x, y, src, r);
}
+void g_region_blit(fb_t *dst, fb_region_t *reg, int x, int y, fb_t *src) {
+ fb_region_t r;
+
+ r.x = 0;
+ r.y = 0;
+ r.w = src->geom.width;
+ r.h = src->geom.height;
+
+ g_region_blit_region(dst, reg, x, y, src, r);
+}
+
void g_blit_region(fb_t *dst, int x, int y, fb_t *src, fb_region_t reg) {
if (x < 0 || y < 0 || reg.x < 0 || reg.y < 0 || reg.w < 0 || reg.h < 0) return; // invalid argument
@@ -311,6 +422,15 @@ void g_blit_region(fb_t *dst, int x, int y, fb_t *src, fb_region_t reg) {
}
}
+void g_region_blit_region(fb_t *dst, fb_region_t *reg, int x, int y, fb_t *src, fb_region_t r) {
+ if (x + r.w > reg->w) r.w = reg->w - x;
+ if (y + r.h > reg->h) r.h = reg->h - y;
+
+ g_blit_region(dst, x + reg->x, y + reg->y, src, r);
+}
+
+// # Scroll #
+
void g_scroll_up(fb_t *dst, int l) {
for (int y = 0; y < dst->geom.height - l; y++) {
memcpy(dst->data + y * dst->geom.pitch,
@@ -319,6 +439,10 @@ void g_scroll_up(fb_t *dst, int l) {
}
}
+void g_region_scroll_up(fb_t *fb, fb_region_t *reg, int l) {
+ // TODO
+}
+
// ---- Text manipulation
#define FONT_ASCII_BITMAP 1
@@ -562,5 +686,9 @@ void g_write(fb_t *fb, int x, int y, const char* text, font_t *font, int size, c
}
}
+void g_region_write(fb_t *fb, fb_region_t *reg, int x, int y, const char* text, font_t *font, int size, color_t c) {
+ // TODO
+}
+
/* vim: set ts=4 sw=4 tw=0 noet :*/
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-21 18:45:47 +0000