mika/nx-hbmenu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Precompute wave gradients

Browse Source
This commit is contained in:
Adubbz 2018-02-25 14:37:15 +11:00 committed by plutoo
parent 0981e34b6f
commit 5eb782ce8e
2 changed files with 31 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
common/math.h
View File

@ -5,5 +5,5 @@
float approxSin(float x);
inline float clamp(float x, float min, float max) {
return x<min ? min : x > max ? max : x;
return fmin(fmax(x, min), max);
}

37
common/menu.c
View File

@ -207,6 +207,28 @@ static void drawEntry(menuEntry_s* me, int off_x, int is_active) {
}
}
color_t waveGradients[3][720];
void precomputeWaveColors(int id, color_t baseColor, int height) {
int y;
int alpha;
float dark_mult, dark_sub = 75;
color_t color;
for (y=0; y<720; y++) {
alpha = y - (720 - height);
if (alpha < 0)
color = baseColor;
else {
dark_mult = clamp((float)(alpha - 50) / (float)height, 0.0, 1.0);
color = MakeColor(baseColor.r - dark_sub * dark_mult, baseColor.g - dark_sub * dark_mult, baseColor.b - dark_sub * dark_mult, 255);
}
waveGradients[id][y] = color;
}
}
void menuStartup() {
const char *path;
@ -220,16 +242,18 @@ void menuStartup() {
folder_icon_small = downscaleIcon(folder_icon_bin);
invalid_icon_small = downscaleIcon(invalid_icon_bin);
precomputeWaveColors(0, themeCurrent.backWaveColor, 295);
precomputeWaveColors(1, themeCurrent.middleWaveColor, 290);
precomputeWaveColors(2, themeCurrent.frontWaveColor, 280);
}
color_t waveBlendAdd(color_t a, color_t b, float alpha) {
return MakeColor(a.r+(b.r*alpha), a.g+b.g*alpha, a.b + b.b*alpha, 255);
}
void drawWave(float timer, color_t color, float height, float phase, float speed) {
void drawWave(int id, float timer, color_t color, int height, float phase, float speed) {
int x, y;
float wave_top_y, alpha;
float dark_mult, dark_sub = 75;
color_t existing_color, new_color;
height = 720 - height;
@ -249,8 +273,7 @@ void drawWave(float timer, color_t color, float height, float phase, float speed
new_color = MakeColor(color.r * (1.0 - alpha) + existing_color.r * alpha, color.g * (1.0 - alpha) + existing_color.g * alpha, color.b * (1.0 - alpha) + existing_color.b * alpha, 255);
}
else { // darken closer to bottom of the waves
dark_mult = clamp((alpha - 50) / height, 0.0, 1.0);
new_color = MakeColor(color.r - dark_sub * dark_mult, color.g - dark_sub * dark_mult, color.b - dark_sub * dark_mult, 255);
new_color = waveGradients[id][y];
}
DrawPixelRaw(x, y, new_color);
@ -307,9 +330,9 @@ void menuLoop() {
}
}
drawWave(timer, themeCurrent.backWaveColor, 295.0, 0.0, 3.0);
drawWave(timer, themeCurrent.middleWaveColor, 290.0, 2.0, 3.5);
drawWave(timer, themeCurrent.frontWaveColor, 280.0, 4.0, -2.5);
drawWave(0, timer, themeCurrent.backWaveColor, 295, 0.0, 3.0);
drawWave(1, timer, themeCurrent.middleWaveColor, 290, 2.0, 3.5);
drawWave(2, timer, themeCurrent.frontWaveColor, 280, 4.0, -2.5);
timer += 0.05;
drawImage(40, 20, 140, 60, themeCurrent.hbmenuLogoImage, IMAGE_MODE_RGBA32);