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introduce color-to-color gradient

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This commit is contained in:
TangoCash
2015-05-04 08:49:25 +02:00
committed by svenhoefer
parent 38cf252ab2
commit 736dcb20db
2 changed files with 53 additions and 0 deletions
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52
src/driver/colorgradient.cpp
View File

@@ -171,4 +171,56 @@ fb_pixel_t* CColorGradient::gradientOneColor(fb_pixel_t col, fb_pixel_t *gradien
return gradientBuf; return gradientBuf;
} }
fb_pixel_t* CColorGradient::gradientColorToColor(fb_pixel_t start_col,fb_pixel_t end_col, fb_pixel_t *gradientBuf, int bSize, int mode, int /*intensity*/)
{
if (gradientBuf == NULL) {
gradientBuf = (fb_pixel_t*) malloc(bSize * sizeof(fb_pixel_t));
if (gradientBuf == NULL) {
dprintf(DEBUG_NORMAL, "[%s:%d] malloc error\n", __func__, __LINE__);
return NULL;
}
}
memset((void*)gradientBuf, '\0', bSize * sizeof(fb_pixel_t));
int start_box = 0;
int end_box = bSize;
if (mode == gradientDark2Light) {
fb_pixel_t temp_col = start_col;
start_col = end_col;
end_col = temp_col;
}
uint8_t start_tr = (uint8_t)((start_col & 0xFF000000) >> 24);
uint8_t start_r = (uint8_t)((start_col & 0x00FF0000) >> 16);
uint8_t start_g = (uint8_t)((start_col & 0x0000FF00) >> 8);
uint8_t start_b = (uint8_t) (start_col & 0x000000FF);
uint8_t end_tr = (uint8_t)((end_col & 0xFF000000) >> 24);
uint8_t end_r = (uint8_t)((end_col & 0x00FF0000) >> 16);
uint8_t end_g = (uint8_t)((end_col & 0x0000FF00) >> 8);
uint8_t end_b = (uint8_t) (end_col & 0x000000FF);
float steps = (float) bSize;
float trStep = (float)(end_tr - start_tr) / steps;
float rStep = (float)(end_r - start_r) / steps;
float gStep = (float)(end_g - start_g) / steps;
float bStep = (float)(end_b - start_b) / steps;
for (int i = start_box; i < end_box; i++) {
uint8_t tr = limitChar((int)((float)start_tr + trStep*(float)i));
uint8_t r = limitChar((int)((float)start_r + rStep*(float)i));
uint8_t g = limitChar((int)((float)start_g + gStep*(float)i));
uint8_t b = limitChar((int)((float)start_b + bStep*(float)i));
gradientBuf[i] = ((tr << 24) & 0xFF000000) |
((r << 16) & 0x00FF0000) |
((g << 8) & 0x0000FF00) |
( b & 0x000000FF);
}
return gradientBuf;
}
//printf("[%s #%d] factor_v: %f, factor_s: %f, v: 0x%02X, s: 0x%02X\n", __func__, __LINE__, factor_v, factor_s, v, s); //printf("[%s #%d] factor_v: %f, factor_s: %f, v: 0x%02X, s: 0x%02X\n", __func__, __LINE__, factor_v, factor_s, v, s);

1
src/driver/colorgradient.h
View File

@@ -54,6 +54,7 @@ class CColorGradient
fb_pixel_t* gradientOneColor(fb_pixel_t col, fb_pixel_t *gradientBuf, int bSize, int mode, int intensity=normal, uint8_t v_min=0x40, uint8_t v_max=0xE0, uint8_t s=0xC0); fb_pixel_t* gradientOneColor(fb_pixel_t col, fb_pixel_t *gradientBuf, int bSize, int mode, int intensity=normal, uint8_t v_min=0x40, uint8_t v_max=0xE0, uint8_t s=0xC0);
fb_pixel_t* gradientColorToTransparent(fb_pixel_t col, fb_pixel_t *gradientBuf, int bSize, int mode, int intensity=normal); fb_pixel_t* gradientColorToTransparent(fb_pixel_t col, fb_pixel_t *gradientBuf, int bSize, int mode, int intensity=normal);
fb_pixel_t* gradientColorToColor(fb_pixel_t start_col, fb_pixel_t end_col, fb_pixel_t *gradientBuf, int bSize, int mode, int intensity=normal);
}; };