ogl_beamforming

Commit: 5055e0d4f13f8fc51358f9ed82a37ee38d3e0130
Parent: f15b9fab81866a6f6b22c95f30d4ad5aceaed1c7
Author: Randy Palamar
Date:   Mon, 12 Aug 2024 13:00:16 -0600

add displayed image filtering

Diffstat:
M
beamformer.c
 | 
15
++++++++++++++-
M
beamformer.h
 | 
1
+

2 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/beamformer.c b/beamformer.c
@@ -27,6 +27,10 @@ alloc_output_image(BeamformerCtx *ctx)
 
 	UnloadRenderTexture(ctx->fsctx.output);
 	ctx->fsctx.output = LoadRenderTexture(odim.x, odim.y);
+	GenTextureMipmaps(&ctx->fsctx.output.texture);
+	//SetTextureFilter(ctx->fsctx.output.texture, TEXTURE_FILTER_ANISOTROPIC_8X);
+	//SetTextureFilter(ctx->fsctx.output.texture, TEXTURE_FILTER_TRILINEAR);
+	SetTextureFilter(ctx->fsctx.output.texture, TEXTURE_FILTER_BILINEAR);
 
 	ctx->flags &= ~ALLOC_OUT_TEX;
 }
@@ -584,6 +588,7 @@ do_beamformer(BeamformerCtx *ctx, Arena arena)
 		do_compute_shader(ctx, CS_UFORCES);
 		do_compute_shader(ctx, CS_MIN_MAX);
 		ctx->flags &= ~DO_COMPUTE;
+		ctx->flags |= GEN_MIPMAPS;
 		glDeleteSync(ctx->csctx.timer_fence);
 		ctx->csctx.timer_fence = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
 	}
@@ -600,6 +605,12 @@ do_beamformer(BeamformerCtx *ctx, Arena arena)
 		EndShaderMode();
 	EndTextureMode();
 
+	/* NOTE: regenerate mipmaps only when the output has actually changed */
+	if (ctx->flags & GEN_MIPMAPS) {
+		GenTextureMipmaps(&ctx->fsctx.output.texture);
+		ctx->flags &= ~GEN_MIPMAPS;
+	}
+
 	/* NOTE: Draw UI */
 	BeginDrawing();
 		ClearBackground(colour_from_normalized(BG_COLOUR));
@@ -655,8 +666,10 @@ do_beamformer(BeamformerCtx *ctx, Arena arena)
 		/* NOTE: check mouse wheel for adjusting dynamic range of image */
 		v2 mouse = { .rl = GetMousePosition() };
 		if (CheckCollisionPointRec(mouse.rl, vr.rl)) {
-			ctx->fsctx.db += GetMouseWheelMove();
+			f32 delta = GetMouseWheelMove();
+			ctx->fsctx.db += delta;
 			CLAMP(ctx->fsctx.db, -120, 0);
+			if (delta) ctx->flags |= GEN_MIPMAPS;
 		}
 
 		static f32 txt_colour_t[2];
diff --git a/beamformer.h b/beamformer.h
@@ -56,6 +56,7 @@ enum program_flags {
 	ALLOC_SSBOS    = 1 << 1,
 	ALLOC_OUT_TEX  = 1 << 2,
 	UPLOAD_FILTER  = 1 << 3,
+	GEN_MIPMAPS    = 1 << 29,
 	DO_COMPUTE     = 1 << 30,
 };