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(svn r10203) -Codechange: more moving things to blitter-layer: DrawLine

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This commit is contained in:
truelight
2007-06-18 19:38:23 +00:00
parent 704a67ff0b
commit d7736f6b83
7 changed files with 127 additions and 68 deletions
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49
src/blitter/32bpp_base.cpp
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@@ -32,6 +32,55 @@ void Blitter_32bppBase::DrawRect(void *video, int width, int height, uint8 color
} while (--height);
}
void Blitter_32bppBase::DrawLine(void *video, int x, int y, int x2, int y2, int screen_width, int screen_height, uint8 color)
{
int dy;
int dx;
int stepx;
int stepy;
int frac;
dy = (y2 - y) * 2;
if (dy < 0) {
dy = -dy;
stepy = -1;
} else {
stepy = 1;
}
dx = (x2 - x) * 2;
if (dx < 0) {
dx = -dx;
stepx = -1;
} else {
stepx = 1;
}
this->SetPixel(video, x, y, color);
if (dx > dy) {
frac = dy - (dx / 2);
while (x != x2) {
if (frac >= 0) {
y += stepy;
frac -= dx;
}
x += stepx;
frac += dy;
if (x > 0 && y > 0 && x < screen_width && y < screen_height) this->SetPixel(video, x, y, color);
}
} else {
frac = dx - (dy / 2);
while (y != y2) {
if (frac >= 0) {
x += stepx;
frac -= dy;
}
y += stepy;
frac += dx;
if (x > 0 && y > 0 && x < screen_width && y < screen_height) this->SetPixel(video, x, y, color);
}
}
}
void Blitter_32bppBase::CopyFromBuffer(void *video, const void *src, int width, int height, int src_pitch)
{
int direction = (height < 0) ? -1 : 1;

1
src/blitter/32bpp_base.hpp
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@@ -17,6 +17,7 @@ public:
/* virtual */ void SetPixel(void *video, int x, int y, uint8 color);
/* virtual */ void SetPixelIfEmpty(void *video, int x, int y, uint8 color);
/* virtual */ void DrawRect(void *video, int width, int height, uint8 color);
/* virtual */ void DrawLine(void *video, int x, int y, int x2, int y2, int screen_width, int screen_height, uint8 color);
/* virtual */ void CopyFromBuffer(void *video, const void *src, int width, int height, int src_pitch);
/* virtual */ void CopyToBuffer(const void *video, void *dst, int width, int height, int dst_pitch);
/* virtual */ void MoveBuffer(void *video_dst, const void *video_src, int width, int height);

50
src/blitter/8bpp_base.cpp
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@@ -36,6 +36,56 @@ void Blitter_8bppBase::DrawRect(void *video, int width, int height, uint8 color)
} while (--height);
}
void Blitter_8bppBase::DrawLine(void *video, int x, int y, int x2, int y2, int screen_width, int screen_height, uint8 color)
{
int dy;
int dx;
int stepx;
int stepy;
int frac;
dy = (y2 - y) * 2;
if (dy < 0) {
dy = -dy;
stepy = -1;
} else {
stepy = 1;
}
dx = (x2 - x) * 2;
if (dx < 0) {
dx = -dx;
stepx = -1;
} else {
stepx = 1;
}
this->SetPixel(video, x, y, color);
if (dx > dy) {
frac = dy - (dx / 2);
while (x != x2) {
if (frac >= 0) {
y += stepy;
frac -= dx;
}
x += stepx;
frac += dy;
if (x > 0 && y > 0 && x < screen_width && y < screen_height) this->SetPixel(video, x, y, color);
}
} else {
frac = dx - (dy / 2);
while (y != y2) {
if (frac >= 0) {
x += stepx;
frac -= dy;
}
y += stepy;
frac += dx;
if (x > 0 && y > 0 && x < screen_width && y < screen_height) this->SetPixel(video, x, y, color);
}
}
}
void Blitter_8bppBase::CopyFromBuffer(void *video, const void *src, int width, int height, int src_pitch)
{
int direction = (height < 0) ? -1 : 1;

1
src/blitter/8bpp_base.hpp
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@@ -17,6 +17,7 @@ public:
/* virtual */ void SetPixel(void *video, int x, int y, uint8 color);
/* virtual */ void SetPixelIfEmpty(void *video, int x, int y, uint8 color);
/* virtual */ void DrawRect(void *video, int width, int height, uint8 color);
/* virtual */ void DrawLine(void *video, int x, int y, int x2, int y2, int screen_width, int screen_height, uint8 color);
/* virtual */ void CopyFromBuffer(void *video, const void *src, int width, int height, int src_pitch);
/* virtual */ void CopyToBuffer(const void *video, void *dst, int width, int height, int dst_pitch);
/* virtual */ void MoveBuffer(void *video_dst, const void *video_src, int width, int height);

13
src/blitter/base.hpp
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@@ -96,6 +96,19 @@ public:
*/
virtual void DrawRect(void *video, int width, int height, uint8 color) = 0;
/**
* Draw a line with a given color.
* @param video The destination pointer (video-buffer).
* @param x The x coordinate from where the line starts.
* @param y The y coordinate from where the line starts.
* @param x2 The x coordinate to where the line goes.
* @param y2 The y coordinate to where the lines goes.
* @param screen_width The width of the screen you are drawing in (to avoid buffer-overflows).
* @param screen_height The height of the screen you are drawing in (to avoid buffer-overflows).
* @param color A 8bpp mapping color.
*/
virtual void DrawLine(void *video, int x, int y, int x2, int y2, int screen_width, int screen_height, uint8 color) = 0;
/**
* Copy from a buffer to the screen.
* @param video The destionation pointer (video-buffer).

1
src/blitter/null.hpp
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@@ -18,6 +18,7 @@ public:
/* virtual */ void SetPixel(void *video, int x, int y, uint8 color) {};
/* virtual */ void SetPixelIfEmpty(void *video, int x, int y, uint8 color) {};
/* virtual */ void DrawRect(void *video, int width, int height, uint8 color) {};
/* virtual */ void DrawLine(void *video, int x, int y, int x2, int y2, int screen_width, int screen_height, uint8 color) {};
/* virtual */ void CopyFromBuffer(void *video, const void *src, int width, int height, int src_pitch) {};
/* virtual */ void CopyToBuffer(const void *video, void *dst, int width, int height, int dst_pitch) {};
/* virtual */ void MoveBuffer(void *video_dst, const void *video_src, int width, int height) {};