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Add clipping to graphics primitives 

- Includes drawChar, drawPixel, fillRect, drawFastHLine, drawFastVLine
This commit is contained in:
Calvin Hass 2020-10-02 19:48:14 -07:00
parent 9e59d312a8
commit 99d5fdbc5d
1 changed files with 16 additions and 23 deletions
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39
TFT_eSPI.cpp
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@ -2485,11 +2485,10 @@ int16_t TFT_eSPI::fontHeight(void)
***************************************************************************************/
void TFT_eSPI::drawChar(int32_t x, int32_t y, uint16_t c, uint32_t color, uint32_t bg, uint8_t size)
{
// TODO: Revise to use _clip* region
if ((x >= _width) || // Clip right
(y >= _height) || // Clip bottom
((x + 6 * size - 1) < 0) || // Clip left
((y + 8 * size - 1) < 0)) // Clip top
if ((x >= _clipX1) || // Clip right
(y >= _clipY1) || // Clip bottom
((x + 6 * size - 1) < _clipX0) || // Clip left
((y + 8 * size - 1) < _clipY0)) // Clip top
return;
if (c < 32) return;
@ -2736,8 +2735,7 @@ void TFT_eSPI::setClipRect(int32_t x, int32_t y, int32_t w, int32_t h)
void TFT_eSPI::drawPixel(int32_t x, int32_t y, uint32_t color)
{
// Range checking
// TODO: Revise to use _clip* region
if ((x < 0) || (y < 0) ||(x >= _width) || (y >= _height)) return;
if ((x < _clipX0) || (y < _clipY0) ||(x >= _clipX1) || (y >= _clipY1)) return;
#ifdef CGRAM_OFFSET
x+=colstart;
@ -2938,12 +2936,11 @@ void TFT_eSPI::drawLine(int32_t x0, int32_t y0, int32_t x1, int32_t y1, uint32_t
void TFT_eSPI::drawFastVLine(int32_t x, int32_t y, int32_t h, uint32_t color)
{
// Clipping
// TODO: Revise to use _clip* region
if ((x < 0) || (x >= _width) || (y >= _height)) return;
if ((x < _clipX0) || (x >= _clipX1) || (y >= _clipY1)) return;
if (y < 0) { h += y; y = 0; }
if (y < _clipY0) { h += (y - _clipY0); y = _clipY0; }
if ((y + h) > _height) h = _height - y;
if ((y + h) > _clipY1) h = _clipY1 - y;
if (h < 1) return;
@ -2964,12 +2961,11 @@ void TFT_eSPI::drawFastVLine(int32_t x, int32_t y, int32_t h, uint32_t color)
void TFT_eSPI::drawFastHLine(int32_t x, int32_t y, int32_t w, uint32_t color)
{
// Clipping
// TODO: Revise to use _clip* region
if ((y < 0) || (x >= _width) || (y >= _height)) return;
if ((y < _clipY0) || (x >= _clipX1) || (y >= _clipY1)) return;
if (x < 0) { w += x; x = 0; }
if (x < _clipX0) { w += (x - _clipX0); x = _clipX0; }
if ((x + w) > _width) w = _width - x;
if ((x + w) > _clipX1) w = _clipX1 - x;
if (w < 1) return;
@ -2990,14 +2986,13 @@ void TFT_eSPI::drawFastHLine(int32_t x, int32_t y, int32_t w, uint32_t color)
void TFT_eSPI::fillRect(int32_t x, int32_t y, int32_t w, int32_t h, uint32_t color)
{
// Clipping
// TODO: Revise to use _clip* region
if ((x >= _width) || (y >= _height)) return;
if ((x >= _clipX1) || (y >= _clipY1)) return;
if (x < 0) { w += x; x = 0; }
if (y < 0) { h += y; y = 0; }
if (x < _clipX0) { w += (x - _clipX0); x = _clipX0; }
if (y < _clipY0) { h += (y - _clipY0); y = _clipY0; }
if ((x + w) > _width) w = _width - x;
if ((y + h) > _height) h = _height - y;
if ((x + w) > _clipX1) w = _clipX1 - x;
if ((y + h) > _clipY1) h = _clipY1 - y;
if ((w < 1) || (h < 1)) return;
@ -3297,7 +3292,6 @@ uint32_t TFT_eSPI::alphaBlend24(uint8_t alpha, uint32_t fgc, uint32_t bgc, uint8
***************************************************************************************/
size_t TFT_eSPI::write(uint8_t utf8)
{
// TODO: Revise to use _clip* region
if (utf8 == '\r') return 1;
uint16_t uniCode = utf8;
@ -3445,7 +3439,6 @@ int16_t TFT_eSPI::drawChar(uint16_t uniCode, int32_t x, int32_t y)
// Any UTF-8 decoding must be done before calling drawChar()
int16_t TFT_eSPI::drawChar(uint16_t uniCode, int32_t x, int32_t y, uint8_t font)
{
// TODO: Revise to use _clip* region
if (!uniCode) return 0;
if (font==1) {