/**
* Copies the bits of the given sprite to the chosen location on the canvas
*/
public void BitBltExt(MySprite sprite, int x, int y, bool invertColors, bool transparentBackground)
{
// Don't start drawing outside the screen - too complicated for late night programming
if (x < 0 || y < 0)
{
return;
}
// Move the screen cursor to the initial position
int screenPos = resX * y + x;
// Compute the length of the sprite
int spriteLength = sprite.height * sprite.width;
// Move the sprite's horizontal cursor to the first column
int spritePosX = 0;
// Loop through the sprite's pixels and copy them to the screen buffer
for (int spritePos = 0; spritePos < spriteLength; spritePos++)
{
try {
// Copy the value of the current pixel, after transforming it according to the given rules
Buffer[screenPos] = TransformSourcePixelValue(sprite.data[spritePos], Buffer[screenPos], invertColors, transparentBackground);
// Move the screen cursor to the next pixel on the screens
screenPos++;
} catch (Exception exc) {
// If it's outside the screen, it will overflow and it will throw an exception which needs to be caught
}
// Don't draw content outside the screen
if (screenPos >= length - 1)
{
return;
}
// Move the sprite's horizontal cursor to the next column
spritePosX++;
// If the sprite's horizontal cursor has reached the last column
if (spritePosX == sprite.width)
{
spritePosX = 0; // Reset the sprite's horizontal cursor
screenPos += resX - sprite.width; // Move the screen cursor to the next row
}
}
}
public void BitBlt(
MySprite Sprite,
int cropX1, int cropY1, int cropX2, int cropY2,
int x, int y
)
{
int trgX = x;
for (int srcX = cropX1; srcX <= cropX2; srcX++)
{
int trgY = y;
for (int srcY = cropY1; srcY <= cropY2; srcY++)
{
SetPixel(trgX, trgY, Sprite.data[srcY * Sprite.width + srcX]);
trgY++;
}
trgX++;
}
}
/**
* Draws text on the canvas using the default font.
* Multi-font support may be added at a later time.
*/
public void DrawColorText(int x, int y, String text, bool invertColors, bool transparentBackground)
{
// Don't crash if there's no font selected or if there's no text provided
if (DefaultFont == null || text == null)
{
return;
}
// Get the chars array from the given text
char[] textChars = text.ToCharArray();
// Initialize cursors
int screenPosX = x;
int prevSpacing = 7; // This will ensure that, if the font is missing a sprite, there can still be an empty space in its place
// For each character in the given text
foreach (char chr in textChars)
{
// Identify the sprite related to to the char
MySprite CharSprite = DefaultFont[chr];
// If the bitmap font has a sprite defined for the char,
// then put it on the screen and set the value of prevSpacing to the width of that last sprite
// NOTE: some bitmap fonts might have sprites with different widths (they may not all be mono-spaced)
if (CharSprite != null)
{
BitBltExt(CharSprite, screenPosX, y, invertColors, transparentBackground);
prevSpacing = CharSprite.width;
}
// Regardless of whether or not there's a sprite defined for the character,
// the screen cursor needs to advance to the next character position
screenPosX += prevSpacing;
// However, if the screen cursor has advanced so far that it's outside the drawing area,
// then there's no sense in processing any more text
if (screenPosX >= resX)
{
return;
}
}
}
public static MySprite ResizeSpriteCanvas(MySprite Sprite, int newWidth, int newHeight, int horizontalAlignment, int verticalAlignment)
{
// Garbage in, garbage out
if (Sprite == null || newWidth < 1 || newHeight < 1)
{
return(null);
}
// Create a new canvas to paint the original sprite to
MyCanvas NewCanvas = new MyCanvas(newWidth, newHeight);
// Compute the coordinates
int posX = ComputePos(Sprite.width, newWidth, horizontalAlignment);
int posY = ComputePos(Sprite.height, newHeight, verticalAlignment);
// Draw the sprite onto the canvas
NewCanvas.BitBlt(Sprite, posX, posY);
// Return a new sprite with the data of a new canvas
return(new MySprite(newWidth, newHeight, NewCanvas.GetBuffer()));
}
public static MySprite ResizeSpriteCanvas(MySprite Sprite, int newWidth, int newHeight)
{
return(ResizeSpriteCanvas(Sprite, newWidth, newHeight, DrawingFrameworkConstants.HORIZONTAL_ALIGN_CENTER, DrawingFrameworkConstants.VERTICAL_ALIGN_MIDDLE));
}
/**
* Copies the bits of the given sprite to the chosen location on the canvas
*/
public void BitBlt(MySprite sprite, int x, int y)
{
BitBltExt(sprite, x, y, false, false);
}
