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Generate a native cursor for the crosshair on the sprite

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In this way we can get pixel from the window surface and put pixels in
the new cursor surface which will represent the crosshair on the
mouse/screen position. In this way we avoid an effect of a slow mouse
response on high refresh rates.

Maybe related to: https://community.aseprite.org/t/3354
This commit is contained in:
David Capello 2021-02-25 16:56:33 -03:00
parent a24f271e3a
commit ef4f691459
2 changed files with 169 additions and 33 deletions
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143
src/app/ui/editor/brush_preview.cpp
View File

@ -27,6 +27,7 @@
#include "app/ui/editor/tool_loop_impl.h"
#include "app/ui_context.h"
#include "app/util/wrap_value.h"
#include "base/scoped_value.h"
#include "doc/algo.h"
#include "doc/blend_internals.h"
#include "doc/brush.h"
@ -35,6 +36,8 @@
#include "doc/layer.h"
#include "doc/primitives.h"
#include "os/display.h"
#include "os/surface.h"
#include "os/system.h"
#include "render/render.h"
#include "ui/manager.h"
#include "ui/system.h"
@ -45,17 +48,13 @@ using namespace doc;
BrushPreview::BrushPreview(Editor* editor)
: m_editor(editor)
, m_type(CROSSHAIR)
, m_onScreen(false)
, m_withModifiedPixels(false)
, m_withRealPreview(false)
, m_screenPosition(0, 0)
, m_editorPosition(0, 0)
{
}
BrushPreview::~BrushPreview()
{
if (m_cursor)
m_cursor->dispose();
}
BrushRef BrushPreview::getCurrentBrush()
@ -311,8 +310,13 @@ void BrushPreview::show(const gfx::Point& screenPos)
ui::ScreenGraphics g;
ui::SetClip clip(&g);
gfx::Color uiCursorColor = color_utils::color_for_ui(appCursorColor);
forEachBrushPixel(&g, m_screenPosition, spritePos, uiCursorColor, &BrushPreview::savePixelDelegate);
forEachBrushPixel(&g, m_screenPosition, spritePos, uiCursorColor, &BrushPreview::drawPixelDelegate);
createNativeCursor();
if (m_cursor)
forEachLittleCrossPixel(&g, m_screenPosition, uiCursorColor, &BrushPreview::putPixelInCursorDelegate);
forEachBrushPixel(&g, spritePos, uiCursorColor, &BrushPreview::savePixelDelegate);
forEachBrushPixel(&g, spritePos, uiCursorColor, &BrushPreview::drawPixelDelegate);
m_withModifiedPixels = true;
}
@ -337,6 +341,12 @@ void BrushPreview::hide()
if (!m_onScreen)
return;
// Don't hide the cursor to avoid flickering, the native mouse
// cursor will be changed anyway after the hide() by the caller.
//
//if (m_cursor)
// m_editor->manager()->getDisplay()->setNativeMouseCursor(os::NativeCursor::kNoCursor);
// Get drawable region
m_editor->getDrawableRegion(m_clippingRegion, ui::Widget::kCutTopWindows);
@ -348,7 +358,7 @@ void BrushPreview::hide()
// Restore pixels
ui::ScreenGraphics g;
ui::SetClip clip(&g);
forEachBrushPixel(&g, m_screenPosition, m_editorPosition, gfx::ColorNone,
forEachBrushPixel(&g, m_editorPosition, gfx::ColorNone,
&BrushPreview::clearPixelDelegate);
}
@ -370,6 +380,7 @@ void BrushPreview::hide()
}
m_onScreen = false;
m_clippingRegion.clear();
m_oldClippingRegion.clear();
}
@ -433,30 +444,89 @@ void BrushPreview::generateBoundaries()
delete mask;
}
void BrushPreview::forEachBrushPixel(
void BrushPreview::createNativeCursor()
{
gfx::Rect cursorBounds;
if (m_type & CROSSHAIR) {
cursorBounds |= gfx::Rect(-3, -3, 7, 7);
m_cursorCenter = -cursorBounds.origin();
}
// Special case of a cursor for one pixel
else if (!(m_type & NATIVE_CROSSHAIR) &&
m_editor->zoom().scale() >= 4.0) {
cursorBounds = gfx::Rect(0, 0, 1, 1);
m_cursorCenter = gfx::Point(0, 0);
}
if (m_cursor) {
if (m_cursor->width() != cursorBounds.w ||
m_cursor->height() != cursorBounds.h) {
m_cursor->dispose();
m_cursor = nullptr;
}
}
if (cursorBounds.isEmpty()) {
ASSERT(!m_cursor);
m_editor->manager()->getDisplay()->setNativeMouseCursor(os::NativeCursor::kNoCursor);
return;
}
if (!m_cursor) {
m_cursor = os::instance()->createRgbaSurface(cursorBounds.w, cursorBounds.h);
// Cannot clear the cursor on each iteration because it can
// generate a flicker effect when zooming in the same mouse
// position. That's strange.
m_cursor->clear();
}
}
void BrushPreview::forEachLittleCrossPixel(
ui::Graphics* g,
const gfx::Point& screenPos,
const gfx::Point& spritePos,
gfx::Color color,
PixelDelegate pixelDelegate)
{
m_savedPixelsIterator = 0;
if (m_type & CROSSHAIR)
traceCrossPixels(g, screenPos, color, pixelDelegate);
if (m_type & SELECTION_CROSSHAIR)
traceSelectionCrossPixels(g, spritePos, color, 1, pixelDelegate);
if (m_type & BRUSH_BOUNDARIES)
traceBrushBoundaries(g, spritePos, color, pixelDelegate);
// Depending on the editor zoom, maybe we need subpixel movement (a
// little dot inside the active pixel)
if (!(m_type & NATIVE_CROSSHAIR) &&
m_editor->zoom().scale() >= 4.0) {
(this->*pixelDelegate)(g, screenPos, color);
}
else {
// We'll remove the pixel (as we didn't called Surface::clear() to
// avoid a flickering issue when zooming in the same mouse
// position).
base::ScopedValue<bool> restore(m_blackAndWhiteNegative, false,
m_blackAndWhiteNegative);
(this->*pixelDelegate)(g, screenPos, gfx::ColorNone);
}
if (m_cursor) {
m_editor->manager()->getDisplay()->setNativeMouseCursor(
m_cursor, m_cursorCenter,
m_editor->manager()->getDisplay()->scale());
}
}
void BrushPreview::forEachBrushPixel(
ui::Graphics* g,
const gfx::Point& spritePos,
gfx::Color color,
PixelDelegate pixelDelegate)
{
m_savedPixelsIterator = 0;
if (m_type & SELECTION_CROSSHAIR)
traceSelectionCrossPixels(g, spritePos, color, 1, pixelDelegate);
if (m_type & BRUSH_BOUNDARIES)
traceBrushBoundaries(g, spritePos, color, pixelDelegate);
m_savedPixelsLimit = m_savedPixelsIterator;
}
@ -489,9 +559,7 @@ void BrushPreview::traceCrossPixels(
}
}
//////////////////////////////////////////////////////////////////////
// Old Thick Cross
// Old thick cross (used for selection tools)
void BrushPreview::traceSelectionCrossPixels(
ui::Graphics* g,
const gfx::Point& pt, gfx::Color color,
@ -528,9 +596,7 @@ void BrushPreview::traceSelectionCrossPixels(
}
}
//////////////////////////////////////////////////////////////////////
// Current Brush Bounds
// Current brush edges
void BrushPreview::traceBrushBoundaries(ui::Graphics* g,
gfx::Point pos,
gfx::Color color,
@ -558,6 +624,33 @@ void BrushPreview::traceBrushBoundaries(ui::Graphics* g,
}
}
//////////////////////////////////////////////////////////////////////
// Pixel delegates
void BrushPreview::putPixelInCursorDelegate(ui::Graphics* g, const gfx::Point& pt, gfx::Color color)
{
ASSERT(m_cursor);
if (!m_clippingRegion.contains(pt))
return;
if (m_blackAndWhiteNegative) {
color_t c = g->getPixel(pt.x, pt.y);
int r = gfx::getr(c);
int g = gfx::getg(c);
int b = gfx::getb(c);
m_cursor->putPixel(color_utils::blackandwhite_neg(gfx::rgba(r, g, b)),
pt.x - m_screenPosition.x + m_cursorCenter.x,
pt.y - m_screenPosition.y + m_cursorCenter.y);
}
else {
m_cursor->putPixel(color,
pt.x - m_screenPosition.x + m_cursorCenter.x,
pt.y - m_screenPosition.y + m_cursorCenter.y);
}
}
void BrushPreview::savePixelDelegate(ui::Graphics* g, const gfx::Point& pt, gfx::Color color)
{
if (m_clippingRegion.contains(pt)) {

59
src/app/ui/editor/brush_preview.h
View File

@ -26,6 +26,10 @@ namespace doc {
class Sprite;
}
namespace os {
class Surface;
}
namespace ui {
class Graphics;
}
@ -37,10 +41,34 @@ namespace app {
public:
// Brush type
enum {
CROSSHAIR = 1,
// A simple cursor in the mouse position for drawing tools. The
// crosshair is painted in real-time with black and white
// depending on the pixel of the screen.
//
// |
// |
// --- * ---
// |
// |
CROSSHAIR = 1,
// Crosshair used in the selection tools in the sprite position.
//
// | |
// -- --
// *
// -- --
// | |
SELECTION_CROSSHAIR = 2,
BRUSH_BOUNDARIES = 4,
NATIVE_CROSSHAIR = 8,
// The boundaries of the brush used in the sprite position
// (depends on the shape of the brush generated with
// doc::MaskBoundaries).
BRUSH_BOUNDARIES = 4,
// Use a pre-defined native cursor that is a crosshair in the
// mouse position.
NATIVE_CROSSHAIR = 8,
};
BrushPreview(Editor* editor);
@ -63,9 +91,16 @@ namespace app {
static doc::color_t getBrushColor(doc::Sprite* sprite, doc::Layer* layer);
void generateBoundaries();
void forEachBrushPixel(
// Creates a little native cursor to draw the CROSSHAIR
void createNativeCursor();
void forEachLittleCrossPixel(
ui::Graphics* g,
const gfx::Point& screenPos,
gfx::Color color,
PixelDelegate pixelDelegate);
void forEachBrushPixel(
ui::Graphics* g,
const gfx::Point& spritePos,
gfx::Color color,
PixelDelegate pixelDelegate);
@ -74,28 +109,36 @@ namespace app {
void traceSelectionCrossPixels(ui::Graphics* g, const gfx::Point& pt, gfx::Color color, int thickness, PixelDelegate pixel);
void traceBrushBoundaries(ui::Graphics* g, gfx::Point pos, gfx::Color color, PixelDelegate pixel);
void putPixelInCursorDelegate(ui::Graphics* g, const gfx::Point& pt, gfx::Color color);
void savePixelDelegate(ui::Graphics* g, const gfx::Point& pt, gfx::Color color);
void drawPixelDelegate(ui::Graphics* g, const gfx::Point& pt, gfx::Color color);
void clearPixelDelegate(ui::Graphics* g, const gfx::Point& pt, gfx::Color color);
Editor* m_editor;
int m_type;
int m_type = CROSSHAIR;
// The brush preview shows the cross or brush boundaries as black
// & white negative.
bool m_blackAndWhiteNegative;
// The brush preview is on the screen.
bool m_onScreen;
bool m_withModifiedPixels;
bool m_withRealPreview;
bool m_onScreen = false;
bool m_withRealPreview = false;
gfx::Point m_screenPosition; // Position in the screen (view)
gfx::Point m_editorPosition; // Position in the editor (model)
// Native mouse cursor to draw crosshair
os::Surface* m_cursor = nullptr;
gfx::Point m_cursorCenter;
// Information about current brush
doc::MaskBoundaries m_brushBoundaries;
int m_brushGen;
// True if we've modified pixels in the display surface
// (e.g. drawing the selection crosshair or the brush edges).
bool m_withModifiedPixels = false;
std::vector<gfx::Color> m_savedPixels;
int m_savedPixelsIterator;
int m_savedPixelsLimit;