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| author | fonsinchen <fonsinchen@openttd.org> | 2013-10-23 19:41:20 +0000 |
|---|---|---|
| committer | fonsinchen <fonsinchen@openttd.org> | 2013-10-23 19:41:20 +0000 |
| commit | 89b7afbac89eb3aac8871a9853cf12a0d6141dab (patch) | |
| tree | e059a94a03773edad3542dbbce7901ac2c3d2dd4 /src/blitter/base.cpp | |
| parent | f528d2c59246cb76c5d84dfac04e84e1368ea650 (diff) | |
| download | openttd-89b7afbac89eb3aac8871a9853cf12a0d6141dab.tar.xz | |
(svn r25911) -Add: Support for drawing dashed lines.
Diffstat (limited to 'src/blitter/base.cpp')
| -rw-r--r-- | src/blitter/base.cpp | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/src/blitter/base.cpp b/src/blitter/base.cpp index bb8b9f234..d30f4054b 100644 --- a/src/blitter/base.cpp +++ b/src/blitter/base.cpp @@ -13,7 +13,7 @@ #include "base.hpp" #include "../core/math_func.hpp" -void Blitter::DrawLine(void *video, int x, int y, int x2, int y2, int screen_width, int screen_height, uint8 colour, int width) +void Blitter::DrawLine(void *video, int x, int y, int x2, int y2, int screen_width, int screen_height, uint8 colour, int width, int dash) { int dy; int dx; @@ -59,6 +59,9 @@ void Blitter::DrawLine(void *video, int x, int y, int x2, int y2, int screen_wid } } + int gap = dash; + if (dash == 0) dash = 1; + int dash_count = 0; if (dx > dy) { int y_low = y; int y_high = y; @@ -76,7 +79,7 @@ void Blitter::DrawLine(void *video, int x, int y, int x2, int y2, int screen_wid x2 += stepx; while (x != x2) { - if (x >= 0 && x < screen_width) { + if (dash_count < dash && x >= 0 && x < screen_width) { for (int y = y_low; y != y_high; y += stepy) { if (y >= 0 && y < screen_height) this->SetPixel(video, x, y, colour); } @@ -92,6 +95,7 @@ void Blitter::DrawLine(void *video, int x, int y, int x2, int y2, int screen_wid x += stepx; frac_low += dy; frac_high += dy; + if (++dash_count >= dash + gap) dash_count = 0; } } else { int x_low = x; @@ -110,7 +114,7 @@ void Blitter::DrawLine(void *video, int x, int y, int x2, int y2, int screen_wid y2 += stepy; while (y != y2) { - if (y >= 0 && y < screen_height) { + if (dash_count < dash && y >= 0 && y < screen_height) { for (int x = x_low; x != x_high; x += stepx) { if (x >= 0 && x < screen_width) this->SetPixel(video, x, y, colour); } @@ -126,6 +130,7 @@ void Blitter::DrawLine(void *video, int x, int y, int x2, int y2, int screen_wid y += stepy; frac_low += dx; frac_high += dx; + if (++dash_count >= dash + gap) dash_count = 0; } } } |