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Arduboy2
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Minor source format changes for drawCompressed() 

No code changes from previous commit.
This commit is contained in:
Scott Allen 2018-01-17 13:56:25 -05:00
parent 6f6849a5bb
commit d44b89e01f
1 changed files with 12 additions and 13 deletions
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11
src/Arduboy2.cpp
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@ -846,7 +846,9 @@ void Arduboy2Base::drawSlowXYBitmap
}
struct BitStreamReader {
// Helper for drawCompressed()
struct BitStreamReader
{
const uint8_t *source;
uint16_t sourceIndex;
uint8_t bitBuffer;
@ -878,15 +880,12 @@ struct BitStreamReader {
}
};
void Arduboy2Base::drawCompressed(int16_t sx, int16_t sy, const uint8_t *bitmap, uint8_t color)
{
// set up decompress state
BitStreamReader cs = BitStreamReader(bitmap);
// read header
int width = (int)cs.readBits(8) + 1;
int height = (int)cs.readBits(8) + 1;
uint8_t spanColour = (uint8_t)cs.readBits(1); // starting colour
@ -896,7 +895,6 @@ void Arduboy2Base::drawCompressed(int16_t sx, int16_t sy, const uint8_t *bitmap,
return;
// sy = sy - (frame * height);
int yOffset = abs(sy) % 8;
int startRow = sy / 8;
if (sy < 0) {
@ -933,7 +931,8 @@ void Arduboy2Base::drawCompressed(int16_t sx, int16_t sy, const uint8_t *bitmap,
int bRow = startRow + rowOffset;
//if (byte) // possible optimisation
if ((bRow <= (HEIGHT / 8) - 1) && (bRow > -2) && (columnOffset + sx <= (WIDTH - 1)) && (columnOffset + sx >= 0))
if ((bRow <= (HEIGHT / 8) - 1) && (bRow > -2) &&
(columnOffset + sx <= (WIDTH - 1)) && (columnOffset + sx >= 0))
{
int16_t offset = (bRow * WIDTH) + sx + columnOffset;
if (bRow >= 0)