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[NEW] Function to invert all the colors of an image

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Crayon2000 2009-02-14 06:03:43 +00:00
parent 3b9d414405
commit 4349944ae7
3 changed files with 3864 additions and 3845 deletions
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24
GRRLIB/GRRLIB/GRRLIB.c
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@ -514,7 +514,7 @@ void GRRLIB_FlushTex(GRRLIB_texImg tex)
* @param texsrc the texture source.
* @param texdest the texture grayscaled destination.
*/
void GRRLIB_BMFX_GrayScale(GRRLIB_texImg texsrc, GRRLIB_texImg texdest) {
void GRRLIB_BMFX_Grayscale(GRRLIB_texImg texsrc, GRRLIB_texImg texdest) {
unsigned int x, y;
u8 gray;
u32 color;
@ -523,7 +523,7 @@ void GRRLIB_BMFX_GrayScale(GRRLIB_texImg texsrc, GRRLIB_texImg texdest) {
for(x=0; x<texsrc.w; x++) {
color = GRRLIB_GetPixelFromtexImg(x, y, texsrc);
gray = ((((color>>8) & 0xFF)*77 + ((color>>16) & 0xFF)*150 + ((color>>24) & 0xFF)*28) / (255));
gray = (((color >> 24 & 0xFF)*77 + (color >> 16 & 0xFF)*150 + (color >> 8 & 0xFF)*28) / (255));
GRRLIB_SetPixelTotexImg(x, y, texdest,
((gray << 24) | (gray << 16) | (gray << 8) | (color & 0xFF)));
@ -531,6 +531,26 @@ void GRRLIB_BMFX_GrayScale(GRRLIB_texImg texsrc, GRRLIB_texImg texdest) {
}
}
/**
* Invert colors of the texture.
* @see GRRLIB_FlushTex
* @param texsrc the texture source.
* @param texdest the texture destination.
*/
void GRRLIB_BMFX_Invert(GRRLIB_texImg texsrc, GRRLIB_texImg texdest) {
unsigned int x, y;
u32 color;
for(y=0; y<texsrc.h; y++) {
for(x=0; x<texsrc.w; x++) {
color = GRRLIB_GetPixelFromtexImg(x, y, texsrc);
GRRLIB_SetPixelTotexImg(x, y, texdest,
((0xFFFFFF - (color >> 8 & 0xFFFFFF)) << 8) | (color & 0xFF));
}
}
}
/**
* A texture effect.
* @see GRRLIB_FlushTex

3
GRRLIB/GRRLIB/GRRLIB.h
View file

@ -67,7 +67,8 @@ void GRRLIB_SetPixelTotexImg(int x, int y, GRRLIB_texImg tex, u32 color);
void GRRLIB_FlushTex(GRRLIB_texImg tex);
void GRRLIB_BMFX_GrayScale(GRRLIB_texImg texsrc, GRRLIB_texImg texdest);
void GRRLIB_BMFX_Grayscale(GRRLIB_texImg texsrc, GRRLIB_texImg texdest);
void GRRLIB_BMFX_Invert(GRRLIB_texImg texsrc, GRRLIB_texImg texdest);
void GRRLIB_BMFX_Scatter(GRRLIB_texImg texsrc, GRRLIB_texImg texdest, int factor);
void GRRLIB_GXEngine(Vector v[], u32 color, long count, u8 fmt);

4
readme.txt
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@ -56,7 +56,7 @@ ChangeLog :
* GRRLIB_CreateEmptyTexture and GRRLIB_FlushTex
* New Bitmap FX: GRRLIB_BMFX_GrayScale and GRRLIB_BMFX_Scatter
* New Bitmap FX: GRRLIB_BMFX_Grayscale, GRRLIB_BMFX_Invert and GRRLIB_BMFX_Scatter
* add GRRLIB_Exit to free the memory allocated by GRRLIB
@ -70,5 +70,3 @@ Contact me to provide me all your patch/addon/new functions...
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