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Support really big images 50000px

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This commit is contained in:
Dušan Poizl
2024-11-30 21:51:47 +01:00
parent 9b7837e9fb
commit be1e65251d
3 changed files with 66 additions and 48 deletions
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imagewidget.cpp
+19 -19
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@@ -190,10 +190,10 @@ void ImageWidgetGL::zoom(int zoom, const QPointF &mousePos)
if(!mousePos.isNull())
focus = mousePos;
if(width() > m_image->width() * m_scale)
m_dx = -width() * 0.5f + m_image->width() * m_scale * 0.5f;
if(height() > m_image->height() * m_scale)
m_dy = -height() * 0.5f + m_image->height() * m_scale * 0.5f;
if(width() > m_imgWidth * m_scale)
m_dx = -width() * 0.5f + m_imgWidth * m_scale * 0.5f;
if(height() > m_imgHeight * m_scale)
m_dy = -height() * 0.5f + m_imgHeight * m_scale * 0.5f;
float newScale = std::sqrt(std::pow(2.0f, (float)m_scaleStop));
float r = newScale / m_scale;
@@ -237,10 +237,10 @@ QVector2D ImageWidgetGL::getImagePixelCoord(const QVector2D &pos)
{
float dx = m_dx;
float dy = m_dy;
if(m_width > m_image->width()*m_scale)
dx = -width()*0.5f + m_image->width()*m_scale*0.5f;
if(m_height > m_image->height()*m_scale)
dy = -height()*0.5f + m_image->height()*m_scale*0.5f;
if(m_width > m_imgWidth * m_scale)
dx = -width()*0.5f + m_imgWidth*m_scale * 0.5f;
if(m_height > m_imgHeight * m_scale)
dy = -height()*0.5f + m_imgHeight*m_scale * 0.5f;
QVector2D offset(dx, dy);
return (pos + offset) / m_scale;
@@ -353,8 +353,8 @@ void swPaint(std::shared_ptr<RawImage> &rawImage, float dx, float dy, float scal
int height = widget->height();
QImage img(width, height, QImage::Format_RGB32);
img.fill(Qt::gray);
int ox = dx;
int oy = dy;
int64_t ox = dx;
int64_t oy = dy;
auto mtf = [&mtfParams](int i, float x)
{
@@ -376,18 +376,18 @@ void swPaint(std::shared_ptr<RawImage> &rawImage, float dx, float dy, float scal
float r[4];
float g[4];
float b[4];
for(int y = std::max(0, -oy); y < height; y++)
for(int64_t y = std::max((int64_t)0, -oy); y < height; y++)
{
uint32_t *pixels = (uint32_t*)(img.scanLine(y));
float iptr;
float fy = std::modf((y + oy) * iscale - 0.5f, &iptr);
int py = iptr;
uint32_t w = py * rawImage->widthBytes();
uint32_t w2 = w;
int64_t py = iptr;
int64_t w = py * rawImage->widthBytes();
int64_t w2 = w;
if(py+1 < imgHeight)w2 += rawImage->widthBytes();
if(py >= imgHeight)break;
for(int x = std::max(0, -ox); x < width; x++)
for(int64_t x = std::max((int64_t)0, -ox); x < width; x++)
{
float fx = std::modf((x + ox) * iscale - 0.5f, &iptr);
int px = iptr;
@@ -467,10 +467,10 @@ void ImageWidgetGL::paintGL()
{
float dx = m_dx;
float dy = m_dy;
if(m_width > m_image->width() * m_scale)
dx = -width() * 0.5f + m_image->width() * m_scale * 0.5f;
if(m_height > m_image->height() * m_scale)
dy = -height() * 0.5f + m_image->height() * m_scale * 0.5f;
if(m_width > m_imgWidth * m_scale)
dx = -width() * 0.5f + m_imgWidth * m_scale * 0.5f;
if(m_height > m_imgHeight * m_scale)
dy = -height() * 0.5f + m_imgHeight * m_scale * 0.5f;
QBrush highlight = style()->standardPalette().highlight();
f->glClear(GL_COLOR_BUFFER_BIT);