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Add content scale queries

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This adds glfwGetWindowContentScale and glfwGetMonitorContentScale for
querying the recommended drawing scale factor for DPI-aware rendering.

Parts of this patch are based on code by @ferreiradaselva.

Fixes #235.
Fixes #439.
Fixes #677.
Fixes #845.
Fixes #898.
This commit is contained in:
Camilla Löwy
2017-08-29 19:19:00 +02:00
parent 1be81a1540
commit 16bf872117
26 changed files with 387 additions and 28 deletions
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tests/monitors.c
+6 -3
View File
@@ -92,21 +92,24 @@ static void key_callback(GLFWwindow* window, int key, int scancode, int action,
static void list_modes(GLFWmonitor* monitor)
{
int count, x, y, widthMM, heightMM, i;
int count, x, y, width_mm, height_mm, i;
float xscale, yscale;
const GLFWvidmode* mode = glfwGetVideoMode(monitor);
const GLFWvidmode* modes = glfwGetVideoModes(monitor, &count);
glfwGetMonitorPos(monitor, &x, &y);
glfwGetMonitorPhysicalSize(monitor, &widthMM, &heightMM);
glfwGetMonitorPhysicalSize(monitor, &width_mm, &height_mm);
glfwGetMonitorContentScale(monitor, &xscale, &yscale);
printf("Name: %s (%s)\n",
glfwGetMonitorName(monitor),
glfwGetPrimaryMonitor() == monitor ? "primary" : "secondary");
printf("Current mode: %s\n", format_mode(mode));
printf("Virtual position: %i %i\n", x, y);
printf("Content scale: %f %f\n", xscale, yscale);
printf("Physical size: %i x %i mm (%0.2f dpi)\n",
widthMM, heightMM, mode->width * 25.4f / widthMM);
width_mm, height_mm, mode->width * 25.4f / width_mm);
printf("Modes:\n");