问题标签 [juicy-pixels]
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haskell - Why doesn't Gloss render in native resolution?
On OSX (with 2560 x 1600 native resolution), Gloss displays everything at zoom-factor 2x. Giving a window size of 300 x 300 to the display function creates a window of 600 x 600. All content in that window is also twice as big (in each dimension), regardless of whether drawn with Gloss or loaded as a sprite (I'm using Juicy for that). Scaling the content down does not give the same clean result as when displayed in the actual native resolution. Is there a way to make Gloss render in full native resolution?
I'm still new to Gloss and hope I haven't missed anything obvious.
Here is the code...
... and the corresponding render:
Update: This seems to be a general issue with OpenGL and retina displays (actually the way OSX pixels are calculated internally). Since, as I understand, Gloss doesn't really allow low-level access my guess is that this is not fixable.
Update 2: This seems to be a particular issue with GLUT as the underlying backend for Gloss. Rebuilding Gloss enabling GLFW and disabling GLUT should fix the issue.
image - 如何将图像从 DynamicImage 类型转换为 Image arr cs e？使用 JuicyPixels 和 HIP 库
我正在使用 JuicyPixels 图像处理库来摄取图像并将其转换为 Matrix 类型。我想将图像的分辨率更改为用户指定的尺寸，以便将其输入神经网络。
到目前为止，我的程序读取图像并将图像转换为 Data.Matrix 矩阵。图像类型来自DynamicImage -> Image Pixel8 ->[[Int]] -> Matrix Int
我曾尝试使用 Haskell 图像处理 (HIP) 库中的 resize 函数，但它需要并输出一种Image arr cs e我不知道如何处理的类型。
到目前为止，这是我的代码：
编辑：
更改程序以删除changeResolution函数，因为我意识到我可以使用convert函数或使用readImageY. 这是更新的代码：
我收到以下错误。你如何从 转换arr为VS？
image - 如何使用 HIP 将图像类型的精度从 Double 转换为 Word8？
我有一个类型的图像Image VS Y Double（使用readImageYHIP 库中的函数后），我想将其转换为Image VS Y Word8. 我该怎么做呢？我需要在这个精度下应用它的下一个函数。
以下是相关代码的片段：
这是错误：
编辑： 双打是在图像类型中存储为 VS 向量类型的灰度像素值。我遇到的问题是可以访问双打以便能够转换它们。试图在这里解释/找到 HIP 库的方法，但我是 Haskell 的新手，无法弄清楚。