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Code Issues Activity

Fix: do not hide parameter by local variable with the same name

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This commit is contained in:
rubidium42
2021-05-26 20:51:17 +02:00
committed by rubidium42
parent eaa3df1e8e
commit b791ffc6de
14 changed files with 130 additions and 130 deletions
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56
src/blitter/common.hpp
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@@ -16,14 +16,14 @@
#include <utility>
template <typename SetPixelT>
void Blitter::DrawLineGeneric(int x, int y, int x2, int y2, int screen_width, int screen_height, int width, int dash, SetPixelT set_pixel)
void Blitter::DrawLineGeneric(int x1, int y1, int x2, int y2, int screen_width, int screen_height, int width, int dash, SetPixelT set_pixel)
{
int dy;
int dx;
int stepx;
int stepy;
dy = (y2 - y) * 2;
dy = (y2 - y1) * 2;
if (dy < 0) {
dy = -dy;
stepy = -1;
@@ -31,7 +31,7 @@ void Blitter::DrawLineGeneric(int x, int y, int x2, int y2, int screen_width, in
stepy = 1;
}
dx = (x2 - x) * 2;
dx = (x2 - x1) * 2;
if (dx < 0) {
dx = -dx;
stepx = -1;
@@ -41,7 +41,7 @@ void Blitter::DrawLineGeneric(int x, int y, int x2, int y2, int screen_width, in
if (dx == 0 && dy == 0) {
/* The algorithm below cannot handle this special case; make it work at least for line width 1 */
if (x >= 0 && x < screen_width && y >= 0 && y < screen_height) set_pixel(x, y);
if (x1 >= 0 && x1 < screen_width && y1 >= 0 && y1 < screen_height) set_pixel(x1, y1);
return;
}
@@ -67,14 +67,14 @@ void Blitter::DrawLineGeneric(int x, int y, int x2, int y2, int screen_width, in
int dash_count = 0;
if (dx > dy) {
if (stepx < 0) {
std::swap(x, x2);
std::swap(y, y2);
std::swap(x1, x2);
std::swap(y1, y2);
stepy = -stepy;
}
if (x2 < 0 || x >= screen_width) return;
if (x2 < 0 || x1 >= screen_width) return;
int y_low = y;
int y_high = y;
int y_low = y1;
int y_high = y1;
int frac_low = dy - frac_diff / 2;
int frac_high = dy + frac_diff / 2;
@@ -87,10 +87,10 @@ void Blitter::DrawLineGeneric(int x, int y, int x2, int y2, int screen_width, in
y_high += stepy;
}
if (x < 0) {
dash_count = (-x) % (dash + gap);
if (x1 < 0) {
dash_count = (-x1) % (dash + gap);
auto adjust_frac = [&](int64 frac, int &y_bound) -> int {
frac -= ((int64) dy) * ((int64) x);
frac -= ((int64) dy) * ((int64) x1);
if (frac >= 0) {
int quotient = frac / dx;
int remainder = frac % dx;
@@ -101,17 +101,17 @@ void Blitter::DrawLineGeneric(int x, int y, int x2, int y2, int screen_width, in
};
frac_low = adjust_frac(frac_low, y_low);
frac_high = adjust_frac(frac_high, y_high);
x = 0;
x1 = 0;
}
x2++;
if (x2 > screen_width) {
x2 = screen_width;
}
while (x != x2) {
while (x1 != x2) {
if (dash_count < dash) {
for (int y = y_low; y != y_high; y += stepy) {
if (y >= 0 && y < screen_height) set_pixel(x, y);
if (y >= 0 && y < screen_height) set_pixel(x1, y);
}
}
if (frac_low >= 0) {
@@ -122,21 +122,21 @@ void Blitter::DrawLineGeneric(int x, int y, int x2, int y2, int screen_width, in
y_high += stepy;
frac_high -= dx;
}
x++;
x1++;
frac_low += dy;
frac_high += dy;
if (++dash_count >= dash + gap) dash_count = 0;
}
} else {
if (stepy < 0) {
std::swap(x, x2);
std::swap(y, y2);
std::swap(x1, x2);
std::swap(y1, y2);
stepx = -stepx;
}
if (y2 < 0 || y >= screen_height) return;
if (y2 < 0 || y1 >= screen_height) return;
int x_low = x;
int x_high = x;
int x_low = x1;
int x_high = x1;
int frac_low = dx - frac_diff / 2;
int frac_high = dx + frac_diff / 2;
@@ -149,10 +149,10 @@ void Blitter::DrawLineGeneric(int x, int y, int x2, int y2, int screen_width, in
x_high += stepx;
}
if (y < 0) {
dash_count = (-y) % (dash + gap);
if (y1 < 0) {
dash_count = (-y1) % (dash + gap);
auto adjust_frac = [&](int64 frac, int &x_bound) -> int {
frac -= ((int64) dx) * ((int64) y);
frac -= ((int64) dx) * ((int64) y1);
if (frac >= 0) {
int quotient = frac / dy;
int remainder = frac % dy;
@@ -163,17 +163,17 @@ void Blitter::DrawLineGeneric(int x, int y, int x2, int y2, int screen_width, in
};
frac_low = adjust_frac(frac_low, x_low);
frac_high = adjust_frac(frac_high, x_high);
y = 0;
y1 = 0;
}
y2++;
if (y2 > screen_height) {
y2 = screen_height;
}
while (y != y2) {
while (y1 != y2) {
if (dash_count < dash) {
for (int x = x_low; x != x_high; x += stepx) {
if (x >= 0 && x < screen_width) set_pixel(x, y);
if (x >= 0 && x < screen_width) set_pixel(x, y1);
}
}
if (frac_low >= 0) {
@@ -184,7 +184,7 @@ void Blitter::DrawLineGeneric(int x, int y, int x2, int y2, int screen_width, in
x_high += stepx;
frac_high -= dy;
}
y++;
y1++;
frac_low += dx;
frac_high += dx;
if (++dash_count >= dash + gap) dash_count = 0;