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from PIL import Image |
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from ed2d.opengl import gl, pgl |
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from ed2d.assets import hdr |
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def load_image(path): |
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img = Image.open(path) |
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# Verify that the image is in RGBA format |
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if ''.join(img.getbands()) != 'RGBA': |
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img = img.convert('RGBA') |
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# Get image data as a list |
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data = list(img.getdata()) |
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width, height = img.size |
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return width, height, data |
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def load_image_hdr(path): |
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myhdr = hdr.HDR() |
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myhdrloader = hdr.HDRLoader() |
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myhdrloader.load(path, myhdr) |
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test = [] |
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for i in range(len(myhdr.cols) / 3): |
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test.append([myhdr.cols[i], myhdr.cols[i + 1], myhdr.cols[i + 2]]) |
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return myhdr.width, myhdr.height, test |
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class BaseTexture(object): |
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''' Texture manager''' |
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# Just for clarity |
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# This is basically a static variable |
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# It will be for assigning each texture unit id easily. |
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# We use the id for calculating GL_TEXTUREi. This value propagates |
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# down into the class instances also, even as it is changed. :D |
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# |
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# edit: decide if this would be better off as an __init__ method that |
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# the subclasses call via super. Would be the best thing if we want to |
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# have external subclasses of the BaseTexture. |
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_textureCount = 0 |
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def _set_unit_id(self): |
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self.texUnitID = self._textureCount |
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BaseTexture._textureCount += 1 |
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def __init__(self, program): |
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self.program = program |
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self.texFormat = None |
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self._set_unit_id() |
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def load_gl(self): |
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self.texSampID = self.program.new_uniform(b'textureSampler') |
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self.texResID = self.program.new_uniform(b'textureResolution') |
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if self.texFormat is None: |
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self.texFormat = gl.GL_RGBA |
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# Load image into new opengl texture |
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self.texID = pgl.glGenTextures(1) |
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gl.glBindTexture(gl.GL_TEXTURE_2D, self.texID) |
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gl.glPixelStorei(gl.GL_UNPACK_ALIGNMENT, 1) |
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gl.glTexParameteri(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MAG_FILTER, gl.GL_LINEAR) |
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gl.glTexParameteri(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MIN_FILTER, gl.GL_LINEAR) |
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pgl.glTexImage2D(gl.GL_TEXTURE_2D, 0, gl.GL_RGBA16F, self.width, self.height, |
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0, self.texFormat, gl.GL_FLOAT, self.data) |
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def bind(self): |
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gl.glActiveTexture(gl.GL_TEXTURE0 + self.texUnitID) |
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gl.glBindTexture(gl.GL_TEXTURE_2D, self.texID) |
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self.program.set_uniform(self.texSampID, self.texUnitID) |
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class Texture(BaseTexture): |
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def __init__(self, path, program, texFormat=None): |
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super(Texture, self).__init__(program) |
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self.path = path |
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self.texFormat = texFormat |
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self.width, self.height, self.data = load_image_hdr(self.path) |
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self.load_gl() |
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def load_gl(self): |
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super(Texture, self).load_gl() |
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self.program.set_uniform_array(self.texResID, [float(self.width), float(self.height)]) |
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class TextureAtlas(BaseTexture): |
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def __init__(self, program, maxWidth=1024, texFormat=None): |
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super(TextureAtlas, self).__init__(program) |
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self.program = program |
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self.texFormat = texFormat |
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# Data format will be as follows: |
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# Indexed by textureID |
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# value: |
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# - a second dict with information about that texture |
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# - x, y position in texture, width and height, texture |
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# data/uvcoords |
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self.textures = [] |
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self.data = 0 |
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self.maxWidth = maxWidth |
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self.width = 0 |
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self.height = 0 |
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self.cursorPosY = 0 |
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self.cursorPosX = 0 |
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self.lineHeight = 0 |
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self.maxSubTextureHeight = 0 |
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def add_texture(self, width, height, texData): |
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textureID = len(self.textures) |
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imgWidth = width |
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imgHeight = height |
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if (self.cursorPosX + imgWidth + 1) >= self.maxWidth: |
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self.width = max(self.width, self.cursorPosX) |
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self.cursorPosY += self.lineHeight |
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self.maxSubTextureHeight = max(self.maxSubTextureHeight, self.lineHeight - 1) |
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self.lineHeight = 0 |
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self.cursorPosX = 0 |
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x1 = self.cursorPosX |
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x2 = self.cursorPosX + imgWidth |
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y1 = self.cursorPosY |
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y2 = self.cursorPosY + imgHeight |
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self.cursorPosX += imgWidth + 1 |
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self.lineHeight = max(self.lineHeight, imgHeight + 1) |
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self.textures.append({ |
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'x1': x1, 'x2': x2, 'y1': y1, 'y2': y2, |
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'width': width, 'height': height, |
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'texData': texData, 'uvCoords': None, |
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}) |
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return textureID |
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def get_uvcoords(self, texID): |
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tex = self.textures[texID] |
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x1 = tex['x1'] / float(self.width) |
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x2 = tex['x2'] / float(self.width) |
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y1 = tex['y1'] / float(self.height) |
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y2 = tex['y2'] / float(self.height) |
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coord = [[x1, y2], |
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[x2, y2], |
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[x1, y1], |
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[x2, y1]] |
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return coord |
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def get_vertex_scale(self, texID): |
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''' |
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Returns calculated vertex scaleing for textures by textureID |
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This nomalizes all subtextures to the height of the tallest texture. |
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This is done because the vertex data sent to the gpu is the same for |
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each |
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''' |
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tex = self.textures[texID] |
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imgWidth = tex['width'] |
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imgHeight = tex['height'] |
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vertScaleY = imgHeight / float(self.maxSubTextureHeight) |
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vertScaleX = imgWidth / float(self.maxSubTextureHeight) |
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return (vertScaleX, vertScaleY) |
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def gen_atlas(self): |
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self.cursorPosY += self.lineHeight |
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self.width = max(self.width, self.cursorPosX) |
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self.height = self.cursorPosY |
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self.maxSubTextureHeight = max(self.maxSubTextureHeight, self.lineHeight - 1) |
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self.load_gl() |
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# add data to blank gl texture with |
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# glTexSubImage2D here |
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for tex in self.textures: |
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x1 = tex['x1'] |
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y1 = tex['y1'] |
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width = tex['width'] |
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height = tex['height'] |
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texData = tex['texData'] |
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pgl.glTexSubImage2D(gl.GL_TEXTURE_2D, 0, x1, y1, width, height, self.texFormat, gl.GL_UNSIGNED_BYTE, texData) |
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explosiveduck /
ed2d
