From db378b6cbb00296a9032aa8fc8a47961f6fced68 Mon Sep 17 00:00:00 2001
From: Vojtech Bocek <vbocek@gmail.com>
Date: Thu, 5 Mar 2015 20:02:57 +0100
Subject: Implement gr_line() and gr_render_circle()

Change-Id: I63c8dcfa276bbeb550ca051a3a1a0646a2d07dc6
Signed-off-by: Vojtech Bocek <vbocek@gmail.com>
---
 minuitwrp/graphics.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
 minuitwrp/minui.h    |  2 ++
 2 files changed, 47 insertions(+)

(limited to 'minuitwrp')

diff --git a/minuitwrp/graphics.c b/minuitwrp/graphics.c
index 7160c7e2e..077211064 100644
--- a/minuitwrp/graphics.c
+++ b/minuitwrp/graphics.c
@@ -586,6 +586,51 @@ void gr_fill(int x, int y, int w, int h)
         gl->enable(gl, GGL_BLEND);
 }
 
+void gr_line(int x0, int y0, int x1, int y1, int width)
+{
+    GGLContext *gl = gr_context;
+
+    if(gr_is_curr_clr_opaque)
+        gl->disable(gl, GGL_BLEND);
+
+    const int coords0[2] = { x0 << 4, y0 << 4 };
+    const int coords1[2] = { x1 << 4, y1 << 4 };
+    gl->linex(gl, coords0, coords1, width << 4);
+
+    if(gr_is_curr_clr_opaque)
+        gl->enable(gl, GGL_BLEND);
+}
+
+gr_surface gr_render_circle(int radius, unsigned char r, unsigned char g, unsigned char b, unsigned char a)
+{
+    int rx, ry;
+    GGLSurface *surface;
+    const int diameter = radius*2 + 1;
+    const int radius_check = radius*radius + radius*0.8;
+    const uint32_t px = (a << 24) | (b << 16) | (g << 8) | r;
+    uint32_t *data;
+
+    surface = malloc(sizeof(GGLSurface));
+    memset(surface, 0, sizeof(GGLSurface));
+
+    data = malloc(diameter * diameter * 4);
+    memset(data, 0, diameter * diameter * 4);
+
+    surface->version = sizeof(surface);
+    surface->width = diameter;
+    surface->height = diameter;
+    surface->stride = diameter;
+    surface->data = (GGLubyte*)data;
+    surface->format = GGL_PIXEL_FORMAT_RGBA_8888;
+
+    for(ry = -radius; ry <= radius; ++ry)
+        for(rx = -radius; rx <= radius; ++rx)
+            if(rx*rx+ry*ry <= radius_check)
+                *(data + diameter*(radius + ry) + (radius+rx)) = px;
+
+    return surface;
+}
+
 void gr_blit(gr_surface source, int sx, int sy, int w, int h, int dx, int dy) {
     if (gr_context == NULL) {
         return;
diff --git a/minuitwrp/minui.h b/minuitwrp/minui.h
index 8ef04445c..6033da728 100644
--- a/minuitwrp/minui.h
+++ b/minuitwrp/minui.h
@@ -39,6 +39,8 @@ void gr_color(unsigned char r, unsigned char g, unsigned char b, unsigned char a
 void gr_clip(int x, int y, int w, int h);
 void gr_noclip();
 void gr_fill(int x, int y, int w, int h);
+void gr_line(int x0, int y0, int x1, int y1, int width);
+gr_surface gr_render_circle(int radius, unsigned char r, unsigned char g, unsigned char b, unsigned char a);
 
 int gr_textEx(int x, int y, const char *s, void* font);
 int gr_textExW(int x, int y, const char *s, void* font, int max_width);
-- 
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