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authorMattias Andrée <maandree@operamail.com>2014-08-06 06:23:25 +0200
committerMattias Andrée <maandree@operamail.com>2014-08-06 06:23:25 +0200
commit9bf41b7c331a95477d8a4c095b7802f7a2f8d913 (patch)
treed5151cd3f477556543b368ac76df313bc736dac6 /src/framebuffer.c
parentdoc (diff)
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framebuffer.c: line drawing
Signed-off-by: Mattias Andrée <maandree@operamail.com>
Diffstat (limited to 'src/framebuffer.c')
-rw-r--r--src/framebuffer.c46
1 files changed, 46 insertions, 0 deletions
diff --git a/src/framebuffer.c b/src/framebuffer.c
index 2418934..b830d6e 100644
--- a/src/framebuffer.c
+++ b/src/framebuffer.c
@@ -161,9 +161,55 @@ void fb_fill_rectangle(framebuffer_t* restrict fb, uint32_t colour,
for (y_ = y; y_ != y2; y_++, mem += fb->line_length)
for (x_ = x1; x_ != x2; x_ += fb->bytes_per_pixel)
+ {
+ int8_t* pixel = mem + x_;
+ *(uint32_t*)pixel = colour;
+ }
+}
+
+
+/**
+ * Draw a horizontal line segment on a framebuffer
+ *
+ * @param fb The framebuffer
+ * @param colour The colour to use when drawing the rectangle
+ * @param x The starting pixel on the X axis for the line segment
+ * @param y The starting pixel on the Y axis for the line segment
+ * @param length The length of the line segment, in pixels
+ */
+void fb_draw_horizontal_line(framebuffer_t* restrict fb, uint32_t colour,
+ uint32_t x, uint32_t y, uint32_t length)
+{
+ int8_t* mem = fb->mem + y * fb->line_length;
+ size_t x1 = x * fb->bytes_per_pixel;
+ size_t x2 = (x + length) * fb->bytes_per_pixel;
+ size_t x_;
+
+ for (x_ = x1; x_ != x2; x_ += fb->bytes_per_pixel)
{
int8_t* pixel = mem + x_;
*(uint32_t*)pixel = colour;
}
}
+
+/**
+ * Draw a vertical line segment on a framebuffer
+ *
+ * @param fb The framebuffer
+ * @param colour The colour to use when drawing the rectangle
+ * @param x The starting pixel on the X axis for the line segment
+ * @param y The starting pixel on the Y axis for the line segment
+ * @param length The length of the line segment, in pixels
+ */
+void fb_draw_vertical_line(framebuffer_t* restrict fb, uint32_t colour,
+ uint32_t x, uint32_t y, uint32_t length)
+{
+ int8_t* mem = fb->mem + y * fb->line_length + x * fb->bytes_per_pixel;
+ size_t y2 = y + length;
+ size_t y_;
+
+ for (y_ = y; y_ != y2; y_++, mem += fb->line_length)
+ *(uint32_t*)mem = colour;
+}
+