Initial commit

examples/textures/formats_loading/main.go

@@ -0,0 +1,219 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/gen2brain/raylib-go/raylib"
+)
+
+const NumTextures = 24
+
+const (
+	PNG_R8G8B8A8 = iota
+	PVR_GRAYSCALE
+	PVR_GRAY_ALPHA
+	PVR_R5G6B5
+	PVR_R5G5B5A1
+	PVR_R4G4B4A4
+	DDS_R5G6B5
+	DDS_R5G5B5A1
+	DDS_R4G4B4A4
+	DDS_R8G8B8A8
+	DDS_DXT1_RGB
+	DDS_DXT1_RGBA
+	DDS_DXT3_RGBA
+	DDS_DXT5_RGBA
+	PKM_ETC1_RGB
+	PKM_ETC2_RGB
+	PKM_ETC2_EAC_RGBA
+	KTX_ETC1_RGB
+	KTX_ETC2_RGB
+	KTX_ETC2_EAC_RGBA
+	ASTC_4x4_LDR
+	ASTC_8x8_LDR
+	PVR_PVRT_RGB
+	PVR_PVRT_RGBA
+)
+
+var formatText = []string{
+	"PNG_R8G8B8A8",
+	"PVR_GRAYSCALE",
+	"PVR_GRAY_ALPHA",
+	"PVR_R5G6B5",
+	"PVR_R5G5B5A1",
+	"PVR_R4G4B4A4",
+	"DDS_R5G6B5",
+	"DDS_R5G5B5A1",
+	"DDS_R4G4B4A4",
+	"DDS_R8G8B8A8",
+	"DDS_DXT1_RGB",
+	"DDS_DXT1_RGBA",
+	"DDS_DXT3_RGBA",
+	"DDS_DXT5_RGBA",
+	"PKM_ETC1_RGB",
+	"PKM_ETC2_RGB",
+	"PKM_ETC2_EAC_RGBA",
+	"KTX_ETC1_RGB",
+	"KTX_ETC2_RGB",
+	"KTX_ETC2_EAC_RGBA",
+	"ASTC_4x4_LDR",
+	"ASTC_8x8_LDR",
+	"PVR_PVRT_RGB",
+	"PVR_PVRT_RGBA",
+}
+
+func main() {
+	screenWidth := int32(800)
+	screenHeight := int32(450)
+
+	raylib.InitWindow(screenWidth, screenHeight, "raylib [textures] example - texture formats loading")
+
+	// NOTE: Textures MUST be loaded after Window initialization (OpenGL context is required)
+
+	sonic := make([]raylib.Texture2D, NumTextures)
+
+	sonic[PNG_R8G8B8A8] = raylib.LoadTexture("texture_formats/sonic.png")
+
+	// Load UNCOMPRESSED PVR texture data
+	sonic[PVR_GRAYSCALE] = raylib.LoadTexture("texture_formats/sonic_GRAYSCALE.pvr")
+	sonic[PVR_GRAY_ALPHA] = raylib.LoadTexture("texture_formats/sonic_L8A8.pvr")
+	sonic[PVR_R5G6B5] = raylib.LoadTexture("texture_formats/sonic_R5G6B5.pvr")
+	sonic[PVR_R5G5B5A1] = raylib.LoadTexture("texture_formats/sonic_R5G5B5A1.pvr")
+	sonic[PVR_R4G4B4A4] = raylib.LoadTexture("texture_formats/sonic_R4G4B4A4.pvr")
+
+	// Load UNCOMPRESSED DDS texture data
+	sonic[DDS_R5G6B5] = raylib.LoadTexture("texture_formats/sonic_R5G6B5.dds")
+	sonic[DDS_R5G5B5A1] = raylib.LoadTexture("texture_formats/sonic_A1R5G5B5.dds")
+	sonic[DDS_R4G4B4A4] = raylib.LoadTexture("texture_formats/sonic_A4R4G4B4.dds")
+	sonic[DDS_R8G8B8A8] = raylib.LoadTexture("texture_formats/sonic_A8R8G8B8.dds")
+
+	// Load COMPRESSED DXT DDS texture data (if supported)
+	sonic[DDS_DXT1_RGB] = raylib.LoadTexture("texture_formats/sonic_DXT1_RGB.dds")
+	sonic[DDS_DXT1_RGBA] = raylib.LoadTexture("texture_formats/sonic_DXT1_RGBA.dds")
+	sonic[DDS_DXT3_RGBA] = raylib.LoadTexture("texture_formats/sonic_DXT3_RGBA.dds")
+	sonic[DDS_DXT5_RGBA] = raylib.LoadTexture("texture_formats/sonic_DXT5_RGBA.dds")
+
+	// Load COMPRESSED ETC texture data (if supported)
+	sonic[PKM_ETC1_RGB] = raylib.LoadTexture("texture_formats/sonic_ETC1_RGB.pkm")
+	sonic[PKM_ETC2_RGB] = raylib.LoadTexture("texture_formats/sonic_ETC2_RGB.pkm")
+	sonic[PKM_ETC2_EAC_RGBA] = raylib.LoadTexture("texture_formats/sonic_ETC2_EAC_RGBA.pkm")
+
+	sonic[KTX_ETC1_RGB] = raylib.LoadTexture("texture_formats/sonic_ETC1_RGB.ktx")
+	sonic[KTX_ETC2_RGB] = raylib.LoadTexture("texture_formats/sonic_ETC2_RGB.ktx")
+	sonic[KTX_ETC2_EAC_RGBA] = raylib.LoadTexture("texture_formats/sonic_ETC2_EAC_RGBA.ktx")
+
+	// Load COMPRESSED ASTC texture data (if supported)
+	sonic[ASTC_4x4_LDR] = raylib.LoadTexture("texture_formats/sonic_ASTC_4x4_ldr.astc")
+	sonic[ASTC_8x8_LDR] = raylib.LoadTexture("texture_formats/sonic_ASTC_8x8_ldr.astc")
+
+	// Load COMPRESSED PVR texture data (if supported)
+	sonic[PVR_PVRT_RGB] = raylib.LoadTexture("texture_formats/sonic_PVRT_RGB.pvr")
+	sonic[PVR_PVRT_RGBA] = raylib.LoadTexture("texture_formats/sonic_PVRT_RGBA.pvr")
+
+	selectedFormat := PNG_R8G8B8A8
+
+	selectRecs := make([]raylib.Rectangle, NumTextures)
+
+	for i := 0; i < NumTextures; i++ {
+		if i < NumTextures/2 {
+			selectRecs[i] = raylib.NewRectangle(40, int32(30+32*i), 150, 30)
+		} else {
+			selectRecs[i] = raylib.NewRectangle(40+152, int32(30+32*(i-NumTextures/2)), 150, 30)
+		}
+	}
+
+	// Texture sizes in KB
+	var textureSizes = [NumTextures]int{
+		512 * 512 * 32 / 8 / 1024, //PNG_R8G8B8A8 (32 bpp)
+		512 * 512 * 8 / 8 / 1024,  //PVR_GRAYSCALE (8 bpp)
+		512 * 512 * 16 / 8 / 1024, //PVR_GRAY_ALPHA (16 bpp)
+		512 * 512 * 16 / 8 / 1024, //PVR_R5G6B5 (16 bpp)
+		512 * 512 * 16 / 8 / 1024, //PVR_R5G5B5A1 (16 bpp)
+		512 * 512 * 16 / 8 / 1024, //PVR_R4G4B4A4 (16 bpp)
+		512 * 512 * 16 / 8 / 1024, //DDS_R5G6B5 (16 bpp)
+		512 * 512 * 16 / 8 / 1024, //DDS_R5G5B5A1 (16 bpp)
+		512 * 512 * 16 / 8 / 1024, //DDS_R4G4B4A4 (16 bpp)
+		512 * 512 * 32 / 8 / 1024, //DDS_R8G8B8A8 (32 bpp)
+		512 * 512 * 4 / 8 / 1024,  //DDS_DXT1_RGB (4 bpp) -Compressed-
+		512 * 512 * 4 / 8 / 1024,  //DDS_DXT1_RGBA (4 bpp) -Compressed-
+		512 * 512 * 8 / 8 / 1024,  //DDS_DXT3_RGBA (8 bpp) -Compressed-
+		512 * 512 * 8 / 8 / 1024,  //DDS_DXT5_RGBA (8 bpp) -Compressed-
+		512 * 512 * 4 / 8 / 1024,  //PKM_ETC1_RGB (4 bpp) -Compressed-
+		512 * 512 * 4 / 8 / 1024,  //PKM_ETC2_RGB (4 bpp) -Compressed-
+		512 * 512 * 8 / 8 / 1024,  //PKM_ETC2_EAC_RGBA (8 bpp) -Compressed-
+		512 * 512 * 4 / 8 / 1024,  //KTX_ETC1_RGB (4 bpp) -Compressed-
+		512 * 512 * 4 / 8 / 1024,  //KTX_ETC2_RGB (4 bpp) -Compressed-
+		512 * 512 * 8 / 8 / 1024,  //KTX_ETC2_EAC_RGBA (8 bpp) -Compressed-
+		512 * 512 * 8 / 8 / 1024,  //ASTC_4x4_LDR (8 bpp) -Compressed-
+		512 * 512 * 2 / 8 / 1024,  //ASTC_8x8_LDR (2 bpp) -Compressed-
+		512 * 512 * 4 / 8 / 1024,  //PVR_PVRT_RGB (4 bpp) -Compressed-
+		512 * 512 * 4 / 8 / 1024,  //PVR_PVRT_RGBA (4 bpp) -Compressed-
+	}
+
+	raylib.SetTargetFPS(60)
+
+	for !raylib.WindowShouldClose() {
+		// Update
+
+		if raylib.IsKeyPressed(raylib.KeyDown) {
+			selectedFormat++
+			if selectedFormat >= NumTextures {
+				selectedFormat = 0
+			}
+		} else if raylib.IsKeyPressed(raylib.KeyUp) {
+			selectedFormat--
+			if selectedFormat < 0 {
+				selectedFormat = NumTextures - 1
+			}
+		} else if raylib.IsKeyPressed(raylib.KeyRight) {
+			if selectedFormat < NumTextures/2 {
+				selectedFormat += NumTextures / 2
+			}
+		} else if raylib.IsKeyPressed(raylib.KeyLeft) {
+			if selectedFormat >= NumTextures/2 {
+				selectedFormat -= NumTextures / 2
+			}
+		}
+
+		// Draw
+
+		raylib.BeginDrawing()
+
+		raylib.ClearBackground(raylib.RayWhite)
+
+		// Draw rectangles
+		for i := 0; i < NumTextures; i++ {
+			if i == selectedFormat {
+				raylib.DrawRectangleRec(selectRecs[i], raylib.SkyBlue)
+				raylib.DrawRectangleLines(selectRecs[i].X, selectRecs[i].Y, selectRecs[i].Width, selectRecs[i].Height, raylib.Blue)
+				raylib.DrawText(formatText[i], selectRecs[i].X+selectRecs[i].Width/2-raylib.MeasureText(formatText[i], 10)/2, selectRecs[i].Y+11, 10, raylib.DarkBlue)
+			} else {
+				raylib.DrawRectangleRec(selectRecs[i], raylib.LightGray)
+				raylib.DrawRectangleLines(selectRecs[i].X, selectRecs[i].Y, selectRecs[i].Width, selectRecs[i].Height, raylib.Gray)
+				raylib.DrawText(formatText[i], selectRecs[i].X+selectRecs[i].Width/2-raylib.MeasureText(formatText[i], 10)/2, selectRecs[i].Y+11, 10, raylib.DarkGray)
+			}
+		}
+
+		// Draw selected texture
+		if sonic[selectedFormat].Id != 0 {
+			raylib.DrawTexture(sonic[selectedFormat], 350, -10, raylib.White)
+		} else {
+			raylib.DrawRectangleLines(488, 165, 200, 110, raylib.DarkGray)
+			raylib.DrawText("FORMAT", 550, 180, 20, raylib.Maroon)
+			raylib.DrawText("NOT SUPPORTED", 500, 210, 20, raylib.Maroon)
+			raylib.DrawText("ON YOUR GPU", 520, 240, 20, raylib.Maroon)
+		}
+
+		raylib.DrawText("Select texture format (use cursor keys):", 40, 10, 10, raylib.DarkGray)
+		raylib.DrawText("Required GPU memory size (VRAM):", 40, 427, 10, raylib.DarkGray)
+		raylib.DrawText(fmt.Sprintf("%4.0d KB", textureSizes[selectedFormat]), 240, 420, 20, raylib.DarkBlue)
+
+		raylib.EndDrawing()
+	}
+
+	for i := 0; i < NumTextures; i++ {
+		raylib.UnloadTexture(sonic[i])
+	}
+
+	raylib.CloseWindow()
+}