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Custom Drawable Layer: Symbol Icon (#1908)

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This commit is contained in:
Stefan Karschti
2024-02-16 17:39:47 +02:00
committed by GitHub
parent 612b256821
commit d6db72e8ba
32 changed files with 789 additions and 30 deletions
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35
platform/darwin/app/ExampleCustomDrawableStyleLayer.mm
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@@ -2,6 +2,9 @@
#import "MLNStyleLayer.h"
#import "MLNCustomDrawableStyleLayer.h"
#import <UIKit/UIKit.h>
#include <mbgl/util/image+MLNAdditions.hpp>
#include <mbgl/layermanager/layer_factory.hpp>
#include <mbgl/style/layer.hpp>
#include <mbgl/style/layers/custom_drawable_layer.hpp>
@@ -81,7 +84,7 @@ public:
interface.addPolyline(polyline);
}
}
// add fill polygon
{
using namespace mbgl;
@@ -111,6 +114,36 @@ public:
// add fill
interface.addFill(geometry);
}
// add symbol
{
using namespace mbgl;
GeometryCoordinate position {static_cast<int16_t>(extent* 0.5f), static_cast<int16_t>(extent* 0.5f)};
// load image
UIImage *assetImage = [UIImage imageNamed:@"pin"];
assert(assetImage.CGImage != NULL);
std::shared_ptr<PremultipliedImage> image = std::make_shared<PremultipliedImage>(MLNPremultipliedImageFromCGImage(assetImage.CGImage));
// set symbol options
Interface::SymbolOptions options;
options.texture = interface.context.createTexture2D();
options.texture->setImage(image);
options.texture->setSamplerConfiguration({gfx::TextureFilterType::Linear, gfx::TextureWrapType::Clamp, gfx::TextureWrapType::Clamp});
options.textureCoordinates = {{{0.0f, 0.08f}, {1.0f, 0.9f}}};
const float xspan = options.textureCoordinates[1][0] - options.textureCoordinates[0][0];
const float yspan = options.textureCoordinates[1][1] - options.textureCoordinates[0][1];
assert(xspan > 0.0f && yspan > 0.0f);
options.size = {static_cast<uint32_t>(image->size.width * xspan), static_cast<uint32_t>(image->size.height * yspan)};
options.anchor = {0.5f, 0.95f};
options.angleDegrees = 45.0f;
options.scaleWithMap = true;
options.pitchWithMap = false;
interface.setSymbolOptions(options);
// add symbol
interface.addSymbol(position);
}
// finish
interface.finish();