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Implement gr_line() and gr_render_circle()

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Change-Id: I63c8dcfa276bbeb550ca051a3a1a0646a2d07dc6
Signed-off-by: Vojtech Bocek <vbocek@gmail.com>
This commit is contained in:
Vojtech Bocek
2015-03-05 20:02:57 +01:00
committed by Ethan Yonker
parent b2e8f672f3
commit db378b6cbb
2 changed files with 47 additions and 0 deletions
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45
minuitwrp/graphics.c
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@@ -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;

2
minuitwrp/minui.h
View File

@@ -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);