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track area of the screen that's dirty

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This commit is contained in:
Jorj Bauer 2017-02-26 11:00:08 -05:00
parent e942d8a4dd
commit 969aa402ad
2 changed files with 67 additions and 16 deletions
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78
apple/appledisplay.cpp
View File

@ -14,12 +14,33 @@
*/
#define extendDirtyRect(x,y) { \
if (dirtyRect.left > x) { \
dirtyRect.left = x; \
} \
if (dirtyRect.right < x) { \
dirtyRect.right = x; \
} \
if (dirtyRect.top > y) { \
dirtyRect.top = y; \
} \
if (dirtyRect.bottom < y) { \
dirtyRect.bottom = y; \
} \
}
#include "globals.h"
AppleDisplay::AppleDisplay(uint8_t *vb) : VMDisplay(vb)
{
this->switches = NULL;
this->dirty = true;
this->dirtyRect.left = this->dirtyRect.top = 0;
this->dirtyRect.right = 279;
this->dirtyRect.bottom = 191;
textColor = g_displayType == m_monochrome?c_green:c_white;
}
AppleDisplay::~AppleDisplay()
@ -221,18 +242,16 @@ void AppleDisplay::Draw80CharacterAt(uint8_t c, uint8_t x, uint8_t y, uint8_t of
// even-align the drawing on the left side so we don't overwrite
// every other one on the left or right side.
uint16_t fgColor = g_displayType == m_monochrome?c_green:c_white;
for (uint8_t y2 = 0; y2<8; y2++) {
uint8_t d = *(cptr + y2);
for (uint8_t x2 = 0; x2 <= 7; x2+=2) {
uint16_t basex = ((x * 2 + offset) * 7) & 0xFFFE; // even aligned
bool pixelOn = ( (d & (1<<x2)) | (d & (1<<(x2+1))) );
if (pixelOn) {
uint8_t val = (invert ? c_black : fgColor);
uint8_t val = (invert ? c_black : textColor);
drawPixel(val, (basex+x2)/2, y*8+y2);
} else {
uint8_t val = (invert ? fgColor : c_black);
uint8_t val = (invert ? textColor : c_black);
drawPixel(val, (basex+x2)/2, y*8+y2);
}
}
@ -244,18 +263,17 @@ void AppleDisplay::DrawCharacterAt(uint8_t c, uint8_t x, uint8_t y)
bool invert;
const uint8_t *cptr = xlateChar(c, &invert);
uint16_t fgColor = g_displayType == m_monochrome?c_green:c_white;
for (uint8_t y2 = 0; y2<8; y2++) {
uint8_t d = *(cptr + y2);
for (uint8_t x2 = 0; x2 < 7; x2++) {
if (d & (1 << x2)) {
uint8_t val = (invert ? c_black : fgColor);
if (d & 1) {
uint8_t val = (invert ? c_black : textColor);
drawPixel(val, x*7+x2, y*8+y2);
} else {
uint8_t val = (invert ? fgColor : c_black);
uint8_t val = (invert ? textColor : c_black);
drawPixel(val, x*7+x2, y*8+y2);
}
d >>= 1;
}
}
}
@ -462,7 +480,6 @@ void AppleDisplay::modeChange()
}
}
dirty = true;
return;
}
@ -525,7 +542,6 @@ void AppleDisplay::modeChange()
}
}
}
dirty = true;
}
void AppleDisplay::Draw80LoresPixelAt(uint8_t c, uint8_t x, uint8_t y, uint8_t offset)
@ -578,12 +594,29 @@ void AppleDisplay::DrawLoresPixelAt(uint8_t c, uint8_t x, uint8_t y)
void AppleDisplay::draw2Pixels(uint16_t two4bitColors, uint16_t x, uint8_t y)
{
videoBuffer[(y * 320 + x) /2] = two4bitColors;
if (!dirty) {
dirty = true;
dirtyRect.left = x; dirtyRect.right = x + 1;
dirtyRect.top = dirtyRect.bottom = y;
} else {
extendDirtyRect(x, y);
extendDirtyRect(x+1, y);
}
void AppleDisplay::drawPixel(uint8_t color4bit, uint16_t x, uint8_t y)
videoBuffer[(y * DISPLAYWIDTH + x) /2] = two4bitColors;
}
inline void AppleDisplay::drawPixel(uint8_t color4bit, uint16_t x, uint8_t y)
{
uint16_t idx = (y * 320 + x) / 2;
if (!dirty) {
dirty = true;
dirtyRect.left = dirtyRect.right = x;
dirtyRect.top = dirtyRect.bottom = y;
} else {
extendDirtyRect(x, y);
}
uint16_t idx = (y * DISPLAYWIDTH + x) / 2;
if (x & 1) {
videoBuffer[idx] = (videoBuffer[idx] & 0xF0) | color4bit;
} else {
@ -594,9 +627,19 @@ void AppleDisplay::drawPixel(uint8_t color4bit, uint16_t x, uint8_t y)
void AppleDisplay::setSwitches(uint16_t *switches)
{
dirty = true;
dirtyRect.left = 0;
dirtyRect.right = 279;
dirtyRect.top = 0;
dirtyRect.bottom = 191;
this->switches = switches;
}
AiieRect AppleDisplay::getDirtyRect()
{
return dirtyRect;
}
bool AppleDisplay::needsRedraw()
{
return dirty;
@ -604,7 +647,10 @@ bool AppleDisplay::needsRedraw()
void AppleDisplay::didRedraw()
{
// FIXME: there's a drawing bug somewhere that's not getting the dirty flag set right.
// dirty = false;
dirty = false;
}
void AppleDisplay::displayTypeChanged()
{
textColor = g_displayType == m_monochrome?c_green:c_white;
}

5
apple/appledisplay.h
View File

@ -43,6 +43,7 @@ class AppleDisplay : public VMDisplay{
virtual ~AppleDisplay();
virtual bool needsRedraw();
virtual void didRedraw();
virtual AiieRect getDirtyRect();
void modeChange(); // FIXME: rename 'redraw'?
void setSwitches(uint16_t *switches);
@ -50,6 +51,7 @@ class AppleDisplay : public VMDisplay{
void writeLores(uint16_t address, uint8_t v);
void writeHires(uint16_t address, uint8_t v);
void displayTypeChanged();
private:
bool deinterlaceAddress(uint16_t address, uint8_t *row, uint8_t *col);
@ -68,8 +70,11 @@ class AppleDisplay : public VMDisplay{
private:
volatile bool dirty;
AiieRect dirtyRect;
uint16_t *switches; // pointer to the MMU's switches
uint16_t textColor;
};
#endif