Questions related to images, including creation and modification

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0answers
2k views

Drawing and rotating bitmaps (with transparency) efficiently in Android

I just started making a game for Android and I'm already having some issues regarding performance. You can imagine the game as being some kind of Tower Defense game with a top-view, and the enemies ...
-2
votes
1answer
418 views

Cannot instantiate the type Image java?

public Image images[] = new Image[20]; for(i=0; i<10; i++){ images[i]=new Image(getClass().getResource("/images/"+i+".jpg")); } I am trying to add images to array but it gives the ...
37
votes
5answers
1k views

Best Way to allow players to “Dye” images without losing color quality?

I am creating a 2.5D isometric (2D images) game. I want the players to be able to "dye" their armor, clothes, and other things. I find that grayscaling everything leads to losing out on some of the ...
2
votes
2answers
209 views

Should I create generic bitmap/sound/et cetera wrappers for Allegro?

Basically, I have been writing a game in C++ using Allegro. I mostly just use the library to draw bitmaps, draw text, and play audio. My main concern as the game continues to grow code-wise, is that ...
1
vote
2answers
3k views

SFML: Generate a background image

I want to generate a background, which is used in the game, on every instance of the game based on certain conditions. To do so, I'm using a sf::RenderTexture and a sf::Texture like this: ...
6
votes
1answer
229 views

Can SFML load anything other than RGBA8888? (RGBA4444, RGB565, etc.)

I can't see this mentioned in the documentation. Am I missing something obvious? Or does SFML really give you no option, forcing everything to be loaded as RGBA8888? Searches on Google and the SFML ...
3
votes
1answer
416 views

Javascript tile map -> bitmap or JSON

I would like to know which idea is better in terms of performance. The map is 5000x5000 tiles and I plan to expand it even more. It is split into 50x50 regions and camera doesn't move with player, ...
0
votes
1answer
199 views

Is there a need to set the parameters again when updating a texture?

Suppose that I'm developing the class COpenGLControl here in code guru to use it for showing a 2D texture in an MFC CPictureControl. and after applying some filters on the image, I will update the ...
8
votes
3answers
676 views

Why is it possible to encounter a texture coordinate greater than 1 or less than 0

I'm studying a text about texture mapping and in the preparing to draw session, I read: Define the texture wrapping parameters. This will control what happens when a texture coordinate greater than ...
4
votes
1answer
500 views

How do I draw a zoomable image in OpenGL?

Up to now I have used glDrawPixels but since my image is a large geotiff one, I'm getting some horrible results for example: this is the code used for zoom extent: void ...
1
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0answers
139 views

Good Resolution for 2D Games [closed]

I am trying to figure out what is a good resolution for my 2D platform game. My images are 16x16 and my frame is 640x480 but I will allow it to be fullscreen also. I need a compatible resolution for ...
2
votes
1answer
4k views

Libgdx loading images

I can't find a sulotions that solves my problem, I've tried pretty much every tip I can find, but with no luck. Error : Exception in thread "LWJGL Application" ...
1
vote
3answers
1k views

corona sdk scale images

How to scale images to full screen on all devices, i want to use % The method I've seen so far is to define pixels image_variable_name = display.newImage( "testimage.jpg", 100, 300 ) I want to do ...
1
vote
3answers
142 views

Generating spritesheet(s) on load

I would like to reduce the size of the spritesheet I am loading by only loading the specific sprites I need. Is there a way to crop and splice images at runtime using javascript? Creating separate ...
1
vote
1answer
102 views

Black areas on different screen sizes

I'm currently facing some problems with sprites/images on different screen sizes. For now the game stage is stretched to maximum width and height of the screen. In Samsung Galaxy S2, SGS3 and SGS4 ...
1
vote
4answers
408 views

Changing color of a moving image without lowering the fps

I just added an option to my game that makes it so that all the enemies will have a random color for their clothes instead of the regular blue. I use this code to draw rectangles over the shirt of the ...
0
votes
2answers
486 views

How to reduce/handle image loading times?

I'm working on a 2D game that has very high resolution images (so that things look good on Retina MacBooks and such), and am seeing a noticeable lag caused by image loading. I notice the strongest ...
1
vote
1answer
438 views

Is this the best way to do sprite sheet animation? [closed]

I would like to make my player animate via a sprite sheet. I looked online and there are many different ways; I want to know what is the best way. Which method will allow me greater flexibility when ...
0
votes
1answer
903 views

How do I programmatically remove an image's background color?

I have a sprite sheet (image) and want to draw it on screen. image = sprite sheet image x = player x position y = player y position width = player width height = player height public ...
1
vote
2answers
957 views

Why cant I use slick-util with image IO and bufferedImage

My problem is that I get errors when I use texture = TextureLoader.getTexture("PNG", ResourceLoader.getResourceAsStream("TEXTURE PATH HERE")); it gives me these errors: Exception in thread "main" ...
1
vote
0answers
71 views

Another Question from the Image Efficiency for Memory Handling [closed]

At this topic, "Which image format is more memory-efficient: PNG, JPEG, or GIF?", one of the fellow Game Development community @Panda Pajama told about the complex concept about image memory handling ...
56
votes
5answers
17k views

Which image format is more memory-efficient: PNG, JPEG, or GIF?

Which image format is more efficient to save memory? PNG, JPEG, or GIF?
1
vote
2answers
369 views

Filtering (e.g. Gauss blur) on seamless textures but without border artifacts?

I am looking for a way to apply (Photoshop, Gimp etc.) filters to seamless textures without the usual border artifacts. The kernel of the Photoshop Gauss filter for example does not wrap around the ...
0
votes
2answers
212 views

Images not rendering in Slick

I have built a game that uses the Slick framework. The maps are tmx files and were built using TileD. The game iterates through a list of players and maps - once a game with a player and map is ...
1
vote
4answers
864 views

What is a good way to load more than a million images for a collectible card game?

I'm using C# with MonoGame and I'm wondering what would be an efficient way to load more than a million card images for a collectible card game. More cards would be continuously added in future ...
3
votes
1answer
446 views

Pygame performance issue for many images

I've made a script for generating a game world based off of image pixel data. Trying to make a python map editor My progress so far has resulted in a program which loads an image and draws sprites ...
2
votes
1answer
178 views

Getting an images rgb value at click

I'm not sure if this is at all possible, but maybe it will spark up an interesting conversation. (Sidenote: working on a small game in Löve). I'm making an archery shooting kind of game, and I was ...
2
votes
1answer
182 views

AngelCode's Bmfont about widths

In AngelCode's Bmfont is there a way to make it so that all of the widths are equal?
3
votes
2answers
1k views

Splitting a texture atlas into seperate images [duplicate]

Possible Duplicate: How to decompose sprite sheet I'm doing a port of an existing game and the designer no longer has all of the original art; he only has the resulting texture atlases he ...
5
votes
1answer
374 views

Rendering scaled-down card images

I have high-quality SVG card images, but they drastically lose their quality when I downsize them. I have tried two ways of rendering cards (using Inkscape and Imagemagics): 1) Render SVG to high-res ...
1
vote
2answers
582 views

Recommended formats to store bitmaps in memory?

I'm working with general purpose image rendering, and high-performance image processing, and so I need to know how to store bitmaps in-memory. (24bpp/32bpp, compressed/raw, etc) What is the "usual" ...
1
vote
1answer
288 views

Absorbtion 2d image effect

I want to create a specyfic 2d image effect. It consists in modifying a sprite so it looks like it is being zoomed to a point or "absorbed" by that point. I'm not really sure what is the technical ...
7
votes
3answers
2k views

Storing a Hex Grid

I've been creating a small hex grid framework for Unity3D and have come to the following dilemma. This is my coordinate system (taken from here): It all works pretty nicely except for the fact I ...
4
votes
4answers
529 views

Can a high FPS negatively affect how a program runs?

Yeah I know this is a broad question and will get down rated, I'm just hoping for some answer before it gets closed. Anyway, I'm using Slick 2D/Java to play around with graphics. I'm having some ...
1
vote
0answers
459 views

How to code a 4x shader/filter which emulates arcade crt display behavior?

I want to write a shader/filer probably in adobe Pixel Bender that will do the best job possible in emulating the fill of an oldskul monochromatic arcade CRT screen. Much like this here: ...
6
votes
2answers
1k views

OpenGL 3.0+ framebuffer to texture/images

I need a way to capture what is rendered on screen, i have read about glReadPixels but it looks really slow. Can you suggest a more efficient or just an alternative way for just copying what is ...
1
vote
1answer
572 views

Lost transparency in SDL surfaces drawn manually

I want to create SDL_Surface objects for each layer of my 2d tile-based map so that I have to render only one surface per layer rather than too many tiles. With normal tiles which do not have ...
-1
votes
1answer
1k views

How do I increase the size of a buffered image to the left and upwards?

I need to know how to increase the size of my buffered image to the left and up, not just the right and down. bI = new BufferedImage(yMax*size*5, xMax*size*5, BufferedImage.TYPE_INT_RGB);
2
votes
1answer
166 views

Multiple images written and read from one meta-file?

Short version: I need a way to store multiple image files in one bigger file, to be used using C#, preferably easily compatible with XNA. The files will be read, written to, but also adaitional files ...
-1
votes
2answers
200 views

Dealing with new animations in html5

Wish I knew of a better title, but the issue is rather specific. So the producer of the game I'm working on has given me new animations to put in the game. I knew there might be issues right off when ...
2
votes
2answers
340 views

there is a BLOB standard to store images in memory?

I would like to abstract all the images in memory, to do so i would like to have just 1 format of reference without talking about the usual file formats for the filesystem like JPG, TGA, and so on. I ...
3
votes
1answer
380 views

What algorithms exist for generating collision geometry from an image?

I am currently working on a game using SFML and Box2D. I am interested in generating collision geometry from the sprite data that I load into SFML. So, for example, an algorithm that would do this ...
2
votes
1answer
115 views

How to combine image with a gradient? Or make it more featured in a different way

I generate an abstract 128x128 image, that is in general two-color (it uses values scaled between "blue" and "white", or other similar color pair). I need to make the image more "featured". ...
2
votes
2answers
1k views

Best practice for image compression

Which is the best format or best technique to compress images without loss of quality for iPhone/iPad games?
42
votes
7answers
3k views

Managing text-maps in a 2D array on to be painted on HTML5 Canvas

So, I'm making a HTML5 RPG just for fun. The map is a <canvas> (512px width, 352px height | 16 tiles across, 11 tiles top to bottom). I want to know if there's a more efficient way to paint the ...
5
votes
1answer
263 views

Split Texture2D Across Line

Background I'm using a texture as a damage map represented by an array of floats for displaying damage effects on a space ship in a process. An upside of this is being able to 'slice' ships in ...
0
votes
1answer
2k views

Slick2D - Cannot instantiate the type Image

I am getting this strange error and I cannot for the life of me figure out why: Cannot instantiate the type Image CODE: import java.awt.Image; import org.newdawn.slick.GameContainer; import ...
0
votes
2answers
179 views

DrawImage doubt

What is the best option for animation in a game (HTML5 Javascript)? Put all the images in one png and change the background. Or create each image separately and draw with DrawImage?
2
votes
1answer
158 views

Is there a way to export all the images of my tweening effect in Flash?

i'm using Flash to create the animation of my character in 2D (i'm just beginning). Is it possible to make a tween effect of a character, and then automatically export all the images/frames? So far, ...
0
votes
1answer
366 views

How to select an image on the J2ME Canvas

I am working on J2ME. I have got a canvas, with a layout of a Checkers board. At the position of pieces, I have placed images. The point at which I got stuck is, how to select/highlite a piece's image ...