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Added draw functions to ImageDraw*() (#1138)

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Added draw functions:
ImageClearBackground()
ImageDrawPixel()
ImageDrawLineEx()
ImageDrawCircle()
This commit is contained in:
Sourav Gupta 2020-03-22 00:53:50 +05:30 committed by GitHub
parent b178c992a1
commit 574c689ff7
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2 changed files with 61 additions and 0 deletions
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4
src/raylib.h
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@ -1142,6 +1142,10 @@ RLAPI Image ImageTextEx(Font font, const char *text, float fontSize, float spaci
RLAPI void ImageDraw(Image *dst, Image src, Rectangle srcRec, Rectangle dstRec, Color tint); // Draw a source image within a destination image (tint applied to source)
RLAPI void ImageDrawRectangle(Image *dst, Rectangle rec, Color color); // Draw rectangle within an image
RLAPI void ImageDrawRectangleLines(Image *dst, Rectangle rec, int thick, Color color); // Draw rectangle lines within an image
RLAPI void ImageClearBackground(Image *dst, Color color); // Clear image background with given color
RLAPI void ImageDrawPixel(Image *dst, Vector2 position, Color color); // Draw pixel within an image
RLAPI void ImageDrawCircle(Image *dst, Vector2 center, int radius, Color color); // Draw circle within an image
RLAPI void ImageDrawLineEx(Image *dst, Vector2 start, Vector2 end, Color color); // Draw line within an image
RLAPI void ImageDrawText(Image *dst, Vector2 position, const char *text, int fontSize, Color color); // Draw text (default font) within an image (destination)
RLAPI void ImageDrawTextEx(Image *dst, Vector2 position, Font font, const char *text, float fontSize, float spacing, Color color); // Draw text (custom sprite font) within an image (destination)
RLAPI void ImageFlipVertical(Image *image); // Flip image vertically

57
src/textures.c
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@ -2014,6 +2014,63 @@ void ImageDrawRectangleLines(Image *dst, Rectangle rec, int thick, Color color)
ImageDrawRectangle(dst, (Rectangle){ rec.x, rec.y + rec.height - thick, rec.width, thick }, color);
}
// Clear image background with given color
void ImageClearBackground(Image *dst, Color color)
{
ImageDrawRectangle(dst, (Rectangle){ 0.0f, 0.0f, dst->width, dst->height }, color);
}
// Draw pixel within an image
void ImageDrawPixel(Image *dst, Vector2 position, Color color)
{
ImageDrawRectangle(dst, (Rectangle){ position.x, position.y, 1.0f, 1.0f }, color);
}
// Draw circle within an image
void ImageDrawCircle(Image *dst, Vector2 center, int radius, Color color)
{
int x = 0, y = radius, xc = center.x, yc = center.y;
int decesionParameter = 3 - 2 * radius;
while (y >= x)
{
ImageDrawPixel(dst, (Vector2){ xc + x, yc + y }, color);
ImageDrawPixel(dst, (Vector2){ xc - x, yc + y }, color);
ImageDrawPixel(dst, (Vector2){ xc + x, yc - y }, color);
ImageDrawPixel(dst, (Vector2){ xc - x, yc - y }, color);
ImageDrawPixel(dst, (Vector2){ xc + y, yc + x }, color);
ImageDrawPixel(dst, (Vector2){ xc - y, yc + x }, color);
ImageDrawPixel(dst, (Vector2){ xc + y, yc - x }, color);
ImageDrawPixel(dst, (Vector2){ xc - y, yc - x }, color);
x++;
if (decesionParameter > 0)
{
y--;
decesionParameter = decesionParameter + 4 * (x - y) + 10;
}
else
decesionParameter = decesionParameter + 4 * x + 6;
}
}
// Draw line within an image
void ImageDrawLineEx(Image *dst, Vector2 start, Vector2 end, Color color)
{
int x1 = start.x, y1 = start.y, x2 = end.x, y2 = end.y;
int m = 2 * (y2 - y1);
int slopeError = m - (x2 - x1);
for (int x = x1, y = y1; x <= x2; x++)
{
ImageDrawPixel(dst, (Vector2){ x, y }, color);
slopeError += m;
if (slopeError >= 0)
{
y++;
slopeError -= 2 * (x2 - x1);
}
}
}
// Draw text (default font) within an image (destination)
void ImageDrawText(Image *dst, Vector2 position, const char *text, int fontSize, Color color)
{