112 lines
3.4 KiB
Go
112 lines
3.4 KiB
Go
package main
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import (
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"fmt"
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"github.com/gen2brain/raylib-go/raylib"
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)
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func main() {
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screenWidth := int32(800)
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screenHeight := int32(450)
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rl.InitWindow(screenWidth, screenHeight, "raylib [text] example - ttf loading")
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msg := "TTF Font"
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// NOTE: Textures/Fonts MUST be loaded after Window initialization (OpenGL context is required)
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fontChars := int32(0)
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// TTF Font loading with custom generation parameters
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font := rl.LoadFontEx("fonts/KAISG.ttf", 96, &fontChars, 0)
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// Generate mipmap levels to use trilinear filtering
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// NOTE: On 2D drawing it won't be noticeable, it looks like FILTER_BILINEAR
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rl.GenTextureMipmaps(&font.Texture)
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fontSize := font.BaseSize
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fontPosition := rl.NewVector2(40, float32(screenHeight)/2+50)
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textSize := rl.Vector2{}
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rl.SetTextureFilter(font.Texture, rl.FilterPoint)
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currentFontFilter := 0 // FilterPoint
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count := int32(0)
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droppedFiles := make([]string, 0)
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rl.SetTargetFPS(60)
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for !rl.WindowShouldClose() {
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// Update
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//----------------------------------------------------------------------------------
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fontSize += rl.GetMouseWheelMove() * 4.0
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// Choose font texture filter method
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if rl.IsKeyPressed(rl.KeyOne) {
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rl.SetTextureFilter(font.Texture, rl.FilterPoint)
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currentFontFilter = 0
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} else if rl.IsKeyPressed(rl.KeyTwo) {
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rl.SetTextureFilter(font.Texture, rl.FilterBilinear)
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currentFontFilter = 1
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} else if rl.IsKeyPressed(rl.KeyThree) {
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// NOTE: Trilinear filter won't be noticed on 2D drawing
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rl.SetTextureFilter(font.Texture, rl.FilterTrilinear)
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currentFontFilter = 2
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}
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textSize = rl.MeasureTextEx(font, msg, float32(fontSize), 0)
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if rl.IsKeyDown(rl.KeyLeft) {
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fontPosition.X -= 10
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} else if rl.IsKeyDown(rl.KeyRight) {
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fontPosition.X += 10
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}
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// Load a dropped TTF file dynamically (at current fontSize)
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if rl.IsFileDropped() {
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droppedFiles = rl.GetDroppedFiles(&count)
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if count == 1 { // Only support one ttf file dropped
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rl.UnloadFont(font)
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font = rl.LoadFontEx(droppedFiles[0], fontSize, &fontChars, 0)
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rl.ClearDroppedFiles()
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}
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}
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rl.BeginDrawing()
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rl.ClearBackground(rl.RayWhite)
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rl.DrawText("Use mouse wheel to change font size", 20, 20, 10, rl.Gray)
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rl.DrawText("Use KEY_RIGHT and KEY_LEFT to move text", 20, 40, 10, rl.Gray)
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rl.DrawText("Use 1, 2, 3 to change texture filter", 20, 60, 10, rl.Gray)
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rl.DrawText("Drop a new TTF font for dynamic loading", 20, 80, 10, rl.DarkGray)
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rl.DrawTextEx(font, msg, fontPosition, float32(fontSize), 0, rl.Black)
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// TODO: It seems texSize measurement is not accurate due to chars offsets...
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//rl.DrawRectangleLines(int32(fontPosition.X), int32(fontPosition.Y), int32(textSize.X), int32(textSize.Y), rl.Red)
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rl.DrawRectangle(0, screenHeight-80, screenWidth, 80, rl.LightGray)
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rl.DrawText(fmt.Sprintf("Font size: %02.02f", float32(fontSize)), 20, screenHeight-50, 10, rl.DarkGray)
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rl.DrawText(fmt.Sprintf("Text size: [%02.02f, %02.02f]", textSize.X, textSize.Y), 20, screenHeight-30, 10, rl.DarkGray)
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rl.DrawText("CURRENT TEXTURE FILTER:", 250, 400, 20, rl.Gray)
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if currentFontFilter == 0 {
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rl.DrawText("POINT", 570, 400, 20, rl.Black)
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} else if currentFontFilter == 1 {
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rl.DrawText("BILINEAR", 570, 400, 20, rl.Black)
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} else if currentFontFilter == 2 {
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rl.DrawText("TRILINEAR", 570, 400, 20, rl.Black)
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}
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rl.EndDrawing()
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}
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rl.UnloadFont(font) // Font unloading
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rl.ClearDroppedFiles() // Clear internal buffers
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rl.CloseWindow()
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}
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