Composing an image with layers and exporting it on MacOS
I have done a lot of iOS development but I've never done any Core Graphics stuff directly. Now I'm trying to create a MacOS application that does the following:
- Lets the user compose an image by layering vector graphics on top of each other. Basically the image is a map of the world, with countries colored in different colors. The world map is the base layer, and each country is its own layer, and when the user adds a country, the corresponding layer is added on top of the world map layer. And all those layers are PDF images so that they can be rendered perfectly, whatever the resolution or size of the window.
- Once the user is happy with their map, they can export it as a wallpaper for their machine, which means I need to export what's visible in the window as an image with the same resolution as the screen, while keeping the aspect ratio of all the layers (aspect-fit), potentially adding the same background color as the one of the world map image is the aspect ratio of the screen is not the same.
I'm currently reading through all the Core Graphics documentation to try and understand how to do it, but there seems to be so many ways of doing it, and I'm not sure everything is useful.
Should I draw everything just with Core Graphics? Should I use NSImageViews instead? Should I draw in CALayers? What approach would you suggest?
macos core-graphics quartz-graphics quartz-2d
asked Dec 31 '18 at 15:05
SebastienSebastien
68311349
add a comment |
I have done a lot of iOS development but I've never done any Core Graphics stuff directly. Now I'm trying to create a MacOS application that does the following:
- Lets the user compose an image by layering vector graphics on top of each other. Basically the image is a map of the world, with countries colored in different colors. The world map is the base layer, and each country is its own layer, and when the user adds a country, the corresponding layer is added on top of the world map layer. And all those layers are PDF images so that they can be rendered perfectly, whatever the resolution or size of the window.
- Once the user is happy with their map, they can export it as a wallpaper for their machine, which means I need to export what's visible in the window as an image with the same resolution as the screen, while keeping the aspect ratio of all the layers (aspect-fit), potentially adding the same background color as the one of the world map image is the aspect ratio of the screen is not the same.
I'm currently reading through all the Core Graphics documentation to try and understand how to do it, but there seems to be so many ways of doing it, and I'm not sure everything is useful.
Should I draw everything just with Core Graphics? Should I use NSImageViews instead? Should I draw in CALayers? What approach would you suggest?
macos core-graphics quartz-graphics quartz-2d
asked Dec 31 '18 at 15:05
SebastienSebastien
68311349
add a comment |
I have done a lot of iOS development but I've never done any Core Graphics stuff directly. Now I'm trying to create a MacOS application that does the following:
- Lets the user compose an image by layering vector graphics on top of each other. Basically the image is a map of the world, with countries colored in different colors. The world map is the base layer, and each country is its own layer, and when the user adds a country, the corresponding layer is added on top of the world map layer. And all those layers are PDF images so that they can be rendered perfectly, whatever the resolution or size of the window.
- Once the user is happy with their map, they can export it as a wallpaper for their machine, which means I need to export what's visible in the window as an image with the same resolution as the screen, while keeping the aspect ratio of all the layers (aspect-fit), potentially adding the same background color as the one of the world map image is the aspect ratio of the screen is not the same.
I'm currently reading through all the Core Graphics documentation to try and understand how to do it, but there seems to be so many ways of doing it, and I'm not sure everything is useful.
Should I draw everything just with Core Graphics? Should I use NSImageViews instead? Should I draw in CALayers? What approach would you suggest?
macos core-graphics quartz-graphics quartz-2d
asked Dec 31 '18 at 15:05
SebastienSebastien
68311349
I have done a lot of iOS development but I've never done any Core Graphics stuff directly. Now I'm trying to create a MacOS application that does the following:
- Lets the user compose an image by layering vector graphics on top of each other. Basically the image is a map of the world, with countries colored in different colors. The world map is the base layer, and each country is its own layer, and when the user adds a country, the corresponding layer is added on top of the world map layer. And all those layers are PDF images so that they can be rendered perfectly, whatever the resolution or size of the window.
- Once the user is happy with their map, they can export it as a wallpaper for their machine, which means I need to export what's visible in the window as an image with the same resolution as the screen, while keeping the aspect ratio of all the layers (aspect-fit), potentially adding the same background color as the one of the world map image is the aspect ratio of the screen is not the same.
I'm currently reading through all the Core Graphics documentation to try and understand how to do it, but there seems to be so many ways of doing it, and I'm not sure everything is useful.
Should I draw everything just with Core Graphics? Should I use NSImageViews instead? Should I draw in CALayers? What approach would you suggest?
macos core-graphics quartz-graphics quartz-2d
macos core-graphics quartz-graphics quartz-2d
asked Dec 31 '18 at 15:05
SebastienSebastien
68311349
asked Dec 31 '18 at 15:05
SebastienSebastien
68311349
asked Dec 31 '18 at 15:05
SebastienSebastien
68311349
asked Dec 31 '18 at 15:05
SebastienSebastien
68311349
asked Dec 31 '18 at 15:05
SebastienSebastien
68311349
68311349
add a comment |
add a comment |
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