dave/openttd
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

(svn r24111) -Codechange: use Colour more instead of manually bitstuffing

Browse Source
This commit is contained in:
rubidium
2012-04-10 20:16:51 +00:00
parent 696a4bcab0
commit ddae614e74
8 changed files with 95 additions and 72 deletions
Download Patch File Download Diff File Expand all files Collapse all files

78
src/blitter/32bpp_base.hpp
View File

@@ -33,33 +33,25 @@ public:
/* virtual */ Blitter::PaletteAnimation UsePaletteAnimation();
/* virtual */ int GetBytesPerPixel() { return 4; }
/**
* Compose a colour based on RGB values.
*/
static inline uint32 ComposeColour(uint a, uint r, uint g, uint b)
{
return (((a) << 24) & 0xFF000000) | (((r) << 16) & 0x00FF0000) | (((g) << 8) & 0x0000FF00) | ((b) & 0x000000FF);
}
/**
* Look up the colour in the current palette.
*/
static inline uint32 LookupColourInPalette(uint index)
static inline Colour LookupColourInPalette(uint index)
{
return _cur_palette.palette[index].data;
return _cur_palette.palette[index];
}
/**
* Compose a colour based on RGBA values and the current pixel value.
*/
static inline uint32 ComposeColourRGBANoCheck(uint r, uint g, uint b, uint a, uint32 current)
static inline Colour ComposeColourRGBANoCheck(uint r, uint g, uint b, uint a, Colour current)
{
uint cr = GB(current, 16, 8);
uint cg = GB(current, 8, 8);
uint cb = GB(current, 0, 8);
uint cr = current.r;
uint cg = current.g;
uint cb = current.b;
/* The 256 is wrong, it should be 255, but 256 is much faster... */
return ComposeColour(0xFF,
return Colour(
((int)(r - cr) * a) / 256 + cr,
((int)(g - cg) * a) / 256 + cg,
((int)(b - cb) * a) / 256 + cb);
@@ -69,10 +61,10 @@ public:
* Compose a colour based on RGBA values and the current pixel value.
* Handles fully transparent and solid pixels in a special (faster) way.
*/
static inline uint32 ComposeColourRGBA(uint r, uint g, uint b, uint a, uint32 current)
static inline Colour ComposeColourRGBA(uint r, uint g, uint b, uint a, Colour current)
{
if (a == 0) return current;
if (a >= 255) return ComposeColour(0xFF, r, g, b);
if (a >= 255) return Colour(r, g, b);
return ComposeColourRGBANoCheck(r, g, b, a, current);
}
@@ -80,11 +72,11 @@ public:
/**
* Compose a colour based on Pixel value, alpha value, and the current pixel value.
*/
static inline uint32 ComposeColourPANoCheck(uint32 colour, uint a, uint32 current)
static inline Colour ComposeColourPANoCheck(Colour colour, uint a, Colour current)
{
uint r = GB(colour, 16, 8);
uint g = GB(colour, 8, 8);
uint b = GB(colour, 0, 8);
uint r = colour.r;
uint g = colour.g;
uint b = colour.b;
return ComposeColourRGBANoCheck(r, g, b, a, current);
}
@@ -93,10 +85,13 @@ public:
* Compose a colour based on Pixel value, alpha value, and the current pixel value.
* Handles fully transparent and solid pixels in a special (faster) way.
*/
static inline uint32 ComposeColourPA(uint32 colour, uint a, uint32 current)
static inline Colour ComposeColourPA(Colour colour, uint a, Colour current)
{
if (a == 0) return current;
if (a >= 255) return (colour | 0xFF000000);
if (a >= 255) {
colour.a = 255;
return colour;
}
return ComposeColourPANoCheck(colour, a, current);
}
@@ -108,13 +103,13 @@ public:
* @param denom denominator, makes colour darker.
* @return the new colour for the screen.
*/
static inline uint32 MakeTransparent(uint32 colour, uint nom, uint denom = 256)
static inline Colour MakeTransparent(Colour colour, uint nom, uint denom = 256)
{
uint r = GB(colour, 16, 8);
uint g = GB(colour, 8, 8);
uint b = GB(colour, 0, 8);
uint r = colour.r;
uint g = colour.g;
uint b = colour.b;
return ComposeColour(0xFF, r * nom / denom, g * nom / denom, b * nom / denom);
return Colour(r * nom / denom, g * nom / denom, b * nom / denom);
}
/**
@@ -122,45 +117,46 @@ public:
* @param colour the colour to make grey.
* @return the new colour, now grey.
*/
static inline uint32 MakeGrey(uint32 colour)
static inline Colour MakeGrey(Colour colour)
{
uint r = GB(colour, 16, 8);
uint g = GB(colour, 8, 8);
uint b = GB(colour, 0, 8);
uint r = colour.r;
uint g = colour.g;
uint b = colour.b;
/* To avoid doubles and stuff, multiple it with a total of 65536 (16bits), then
* divide by it to normalize the value to a byte again. See heightmap.cpp for
* information about the formula. */
colour = ((r * 19595) + (g * 38470) + (b * 7471)) / 65536;
uint grey = ((r * 19595) + (g * 38470) + (b * 7471)) / 65536;
return ComposeColour(0xFF, colour, colour, colour);
return Colour(grey, grey, grey);
}
static const int DEFAULT_BRIGHTNESS = 64;
static inline uint32 AdjustBrightness(uint32 colour, uint8 brightness)
static inline Colour AdjustBrightness(Colour colour, uint8 brightness)
{
/* Shortcut for normal brightness */
if (brightness == DEFAULT_BRIGHTNESS) return colour;
uint16 ob = 0;
uint16 r = GB(colour, 16, 8) * brightness / DEFAULT_BRIGHTNESS;
uint16 g = GB(colour, 8, 8) * brightness / DEFAULT_BRIGHTNESS;
uint16 b = GB(colour, 0, 8) * brightness / DEFAULT_BRIGHTNESS;
uint16 r = colour.r * brightness / DEFAULT_BRIGHTNESS;
uint16 g = colour.g * brightness / DEFAULT_BRIGHTNESS;
uint16 b = colour.b * brightness / DEFAULT_BRIGHTNESS;
/* Sum overbright */
if (r > 255) ob += r - 255;
if (g > 255) ob += g - 255;
if (b > 255) ob += b - 255;
if (ob == 0) return ComposeColour(GB(colour, 24, 8), r, g, b);
if (ob == 0) return Colour(r, g, b, colour.a);
/* Reduce overbright strength */
ob /= 2;
return ComposeColour(GB(colour, 24, 8),
return Colour(
r >= 255 ? 255 : min(r + ob * (255 - r) / 256, 255),
g >= 255 ? 255 : min(g + ob * (255 - g) / 256, 255),
b >= 255 ? 255 : min(b + ob * (255 - b) / 256, 255));
b >= 255 ? 255 : min(b + ob * (255 - b) / 256, 255),
colour.a);
}
};