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feat: Implement cross-platform DPI scaling
This replaces the Windows-only code with code that should work on all the platforms. Tested on Linux/Wayland. The “Scaling” option is now just treated like a normal UI zoom control for users who want a larger UI. This means “Native” scaling option is removed now since that does not mean anything.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,35 @@ | ||
| #pragma once | ||
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| struct GLFWwindow; | ||
| struct GLFWmonitor; | ||
| typedef void (* GLFWcursorposfun)(GLFWwindow* window, double diX, double diY); | ||
| typedef void (* GLFWframebuffersizefun)(GLFWwindow* window, int width, int height); | ||
| typedef void (* GLFWwindowcontentscalefun)(GLFWwindow* window, float xscale, float yscale); | ||
| typedef void (* GLFWwindowposfun)(GLFWwindow* window, int diX, int diY); | ||
| typedef void (* GLFWwindowsizefun)(GLFWwindow* window, int diWidth, int diHeight); | ||
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| namespace hex { | ||
| /** | ||
| * Wrapper GLFW functions that use a device-independent coordinate system | ||
| * where the reference pixel is always 1/96in. | ||
| */ | ||
| namespace glfw { | ||
| GLFWwindow *CreateWindow(int diWidth, int diHeight, const char* title, GLFWmonitor* monitor, GLFWwindow* share); | ||
| void DestroyWindow(GLFWwindow *window); | ||
| void *GetWindowUserPointer(GLFWwindow *window); | ||
| void *SetWindowUserPointer(GLFWwindow *window, void *pointer); | ||
| void GetMonitorPos(GLFWmonitor *monitor, int *diX, int *diY); | ||
| bool GetMonitorSize(GLFWmonitor *monitor, int *diWidth, int *diHeight); | ||
| void SetWindowMonitor(GLFWwindow* window, GLFWmonitor* monitor, int diXpos, int diYpos, int diWidth, int diHeight, int refreshRate); | ||
| void GetWindowPos(GLFWwindow *window, int *diX, int *diY); | ||
| void SetWindowPos(GLFWwindow *window, int diX, int diY); | ||
| void GetWindowSize(GLFWwindow *window, int *diWidth, int *diHeight); | ||
| void SetWindowSize(GLFWwindow *window, int diWidth, int diHeight); | ||
| void SetWindowSizeLimits(GLFWwindow *window, int diMinWidth, int diMinHeight, int diMaxWidth, int diMaxHeight); | ||
| GLFWcursorposfun SetCursorPosCallback(GLFWwindow *window, GLFWcursorposfun callback); | ||
| GLFWwindowposfun SetFramebufferSizeCallback(GLFWwindow *window, GLFWframebuffersizefun callback); | ||
| GLFWwindowcontentscalefun SetWindowContentScaleCallback(GLFWwindow *window, GLFWwindowcontentscalefun callback); | ||
| GLFWwindowposfun SetWindowPosCallback(GLFWwindow *window, GLFWwindowposfun callback); | ||
| GLFWwindowsizefun SetWindowSizeCallback(GLFWwindow *window, GLFWwindowsizefun callback); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,223 @@ | ||
| #include <hex/ui/glfw_di.h> | ||
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| #include <GLFW/glfw3.h> | ||
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| #include <new> | ||
| #include <stdexcept> | ||
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| namespace hex::glfw { | ||
| struct GlfwData { | ||
| void *userPointer = nullptr; | ||
| GLFWcursorposfun userCursorPosFn = nullptr; | ||
| GLFWframebuffersizefun userFramebufferSizeFn = nullptr; | ||
| GLFWwindowcontentscalefun userWindowContentScaleFn = nullptr; | ||
| GLFWwindowposfun userWindowPosFn = nullptr; | ||
| GLFWwindowsizefun userWindowSizeFn = nullptr; | ||
| float scaleX = 1.0F; | ||
| float scaleY = 1.0F; | ||
| }; | ||
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| static void RecalculateScale(GLFWwindow *window, GlfwData *data) { | ||
| int width, height, framebufferWidth, framebufferHeight; | ||
| float scaleX, scaleY; | ||
| glfwGetWindowSize(window, &width, &height); | ||
| glfwGetFramebufferSize(window, &framebufferWidth, &framebufferHeight); | ||
| glfwGetWindowContentScale(window, &scaleX, &scaleY); | ||
| data->scaleX = scaleX / (float(framebufferWidth) / width); | ||
| data->scaleY = scaleY / (float(framebufferHeight) / height); | ||
| } | ||
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| static GlfwData* GetWindowData(GLFWwindow *window) { | ||
| if (!window) | ||
| return nullptr; | ||
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| return static_cast<GlfwData *>(glfwGetWindowUserPointer(window)); | ||
| } | ||
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| template <typename T> | ||
| void FromGLFW(GLFWwindow *window, T *x, T *y) { | ||
| auto data = GetWindowData(window); | ||
| if (!data) | ||
| throw std::runtime_error("Missing window data; did you use glfwCreateWindow directly instead of hex::glfw::CreateWindow?"); | ||
| if (x) | ||
| *x /= data->scaleX; | ||
| if (y) | ||
| *y /= data->scaleY; | ||
| } | ||
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| template <typename T> | ||
| static void FromGLFW(GLFWmonitor *monitor, T *x, T *y) { | ||
| float xScale, yScale; | ||
| glfwGetMonitorContentScale(monitor, &xScale, &yScale); | ||
| if (x) | ||
| *x /= xScale; | ||
| if (y) | ||
| *y /= yScale; | ||
| } | ||
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| template <typename T> | ||
| void ToGLFW(GLFWwindow *window, T *x, T *y) { | ||
| auto data = GetWindowData(window); | ||
| if (!data) | ||
| throw std::runtime_error("Missing window data; did you use glfwCreateWindow directly instead of hex::glfw::CreateWindow?"); | ||
| if (x) | ||
| *x *= data->scaleX; | ||
| if (y) | ||
| *y *= data->scaleY; | ||
| } | ||
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| template <typename T> | ||
| static void ToGLFW(GLFWmonitor *monitor, T *x, T *y) { | ||
| float xScale, yScale; | ||
| glfwGetMonitorContentScale(monitor, &xScale, &yScale); | ||
| if (x) | ||
| *x *= xScale; | ||
| if (y) | ||
| *y *= yScale; | ||
| } | ||
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| GLFWwindow* CreateWindow(int diWidth, int diHeight, const char* title, GLFWmonitor* monitor, GLFWwindow* share) { | ||
| auto window = glfwCreateWindow(1, 1, title, monitor, share); | ||
| if (!window) | ||
| return nullptr; | ||
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| auto *data = new (std::nothrow) GlfwData; | ||
| if (!data) { | ||
| glfwDestroyWindow(window); | ||
| return nullptr; | ||
| } | ||
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| glfwSetWindowUserPointer(window, data); | ||
| RecalculateScale(window, data); | ||
| glfwSetWindowSize(window, diWidth * data->scaleX, diHeight * data->scaleY); | ||
| glfwSetFramebufferSizeCallback(window, [](GLFWwindow *window, int width, int height) { | ||
| auto data = GetWindowData(window); | ||
| RecalculateScale(window, data); | ||
| if (data->userFramebufferSizeFn) | ||
| (data->userFramebufferSizeFn)(window, width, height); | ||
| }); | ||
| glfwSetWindowContentScaleCallback(window, [](GLFWwindow *window, float scaleX, float scaleY) { | ||
| auto data = GetWindowData(window); | ||
| RecalculateScale(window, data); | ||
| if (data->userWindowContentScaleFn) | ||
| (data->userWindowContentScaleFn)(window, scaleX, scaleY); | ||
| }); | ||
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| return window; | ||
| } | ||
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| void DestroyWindow(GLFWwindow *window) { | ||
| if (!window) | ||
| return; | ||
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| delete GetWindowData(window); | ||
| glfwDestroyWindow(window); | ||
| } | ||
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| void *GetWindowUserPointer(GLFWwindow *window) { | ||
| if (!window) | ||
| return nullptr; | ||
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| return GetWindowData(window)->userPointer; | ||
| } | ||
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| void *SetWindowUserPointer(GLFWwindow *window, void *pointer) { | ||
| if (!window) | ||
| return nullptr; | ||
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| auto data = GetWindowData(window); | ||
| auto prev = data->userPointer; | ||
| data->userPointer = pointer; | ||
| return prev; | ||
| } | ||
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| bool GetMonitorSize(GLFWmonitor *monitor, int *diWidth, int *diHeight) { | ||
| auto mode = glfwGetVideoMode(monitor); | ||
| if (!mode) | ||
| return false; | ||
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| if (diWidth) | ||
| *diWidth = mode->width; | ||
| if (diHeight) | ||
| *diHeight = mode->height; | ||
| FromGLFW(monitor, diWidth, diHeight); | ||
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| return true; | ||
| } | ||
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| void GetMonitorPos(GLFWmonitor *monitor, int *diX, int *diY) { | ||
| glfwGetMonitorPos(monitor, diX, diY); | ||
| FromGLFW(monitor, diX, diY); | ||
| } | ||
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| void SetWindowMonitor(GLFWwindow* window, GLFWmonitor* monitor, int diXpos, int diYpos, int diWidth, int diHeight, int refreshRate) { | ||
| if (monitor) | ||
| ToGLFW(monitor, &diXpos, &diYpos); | ||
| else | ||
| ToGLFW(window, &diXpos, &diYpos); | ||
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| ToGLFW(window, &diWidth, &diHeight); | ||
| glfwSetWindowMonitor(window, monitor, diXpos, diYpos, diWidth, diHeight, refreshRate); | ||
| } | ||
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| void GetWindowPos(GLFWwindow *window, int *diX, int *diY) { | ||
| glfwGetWindowPos(window, diX, diY); | ||
| FromGLFW(window, diX, diY); | ||
| } | ||
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| void SetWindowPos(GLFWwindow *window, int diX, int diY) { | ||
| ToGLFW(window, &diX, &diY); | ||
| glfwSetWindowPos(window, diX, diY); | ||
| } | ||
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| void GetWindowSize(GLFWwindow *window, int *diWidth, int *diHeight) { | ||
| glfwGetWindowSize(window, diWidth, diHeight); | ||
| FromGLFW(window, diWidth, diHeight); | ||
| } | ||
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| void SetWindowSize(GLFWwindow *window, int diWidth, int diHeight) { | ||
| ToGLFW(window, &diWidth, &diHeight); | ||
| glfwSetWindowSize(window, diWidth, diHeight); | ||
| } | ||
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| void SetWindowSizeLimits(GLFWwindow *window, int diMinWidth, int diMinHeight, int diMaxWidth, int diMaxHeight) { | ||
| ToGLFW(window, | ||
| diMinWidth == GLFW_DONT_CARE ? nullptr : &diMinWidth, | ||
| diMinHeight == GLFW_DONT_CARE ? nullptr : &diMinHeight); | ||
| ToGLFW(window, | ||
| diMaxWidth == GLFW_DONT_CARE ? nullptr : &diMaxWidth, | ||
| diMaxHeight == GLFW_DONT_CARE ? nullptr : &diMaxHeight); | ||
| glfwSetWindowSizeLimits(window, diMinWidth, diMinHeight, diMaxWidth, diMaxHeight); | ||
| } | ||
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| #define IMHEX_WINDOW_CALLBACK_SCALE(fnName, cbType, paramType) \ | ||
| static void fnName##Wrapper(GLFWwindow *window, paramType x, paramType y) { \ | ||
| FromGLFW(window, &x, &y); \ | ||
| (GetWindowData(window)->user##fnName##Fn)(window, x, y); \ | ||
| } \ | ||
| \ | ||
| cbType Set##fnName##Callback(GLFWwindow *window, cbType callback) { \ | ||
| auto data = GetWindowData(window); \ | ||
| auto previous = data->user##fnName##Fn; \ | ||
| data->user##fnName##Fn = callback; \ | ||
| glfwSet##fnName##Callback(window, callback ? fnName##Wrapper : nullptr);\ | ||
| return previous; \ | ||
| } | ||
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| IMHEX_WINDOW_CALLBACK_SCALE(CursorPos, GLFWcursorposfun, double) | ||
| IMHEX_WINDOW_CALLBACK_SCALE(WindowPos, GLFWwindowposfun, int) | ||
| IMHEX_WINDOW_CALLBACK_SCALE(WindowSize, GLFWwindowsizefun, int) | ||
| #undef IMHEX_WINDOW_CALLBACK_SCALE | ||
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| #define IMHEX_WINDOW_CALLBACK_RECALC(fnName, cbType) \ | ||
| cbType Set##fnName##Callback(GLFWwindow *window, cbType callback) { \ | ||
| auto data = GetWindowData(window); \ | ||
| auto previous = data->user##fnName##Fn; \ | ||
| data->user##fnName##Fn = callback; \ | ||
| return previous; \ | ||
| } | ||
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| IMHEX_WINDOW_CALLBACK_RECALC(FramebufferSize, GLFWframebuffersizefun) | ||
| IMHEX_WINDOW_CALLBACK_RECALC(WindowContentScale, GLFWwindowcontentscalefun) | ||
| #undef IMHEX_WINDOW_CALLBACK_RECALC | ||
| } |
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