From 7682cf917a05784c132b1faca2611986c6a01e04 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Jean-Philippe=20Bruy=C3=A8re?= <jp_bruyere@hotmail.com>
Date: Thu, 14 Jul 2022 06:17:32 +0200
Subject: [PATCH] vkvg_surface_resize

---
 include/vkvg.h              |  5 +++++
 src/vkvg_context.c          |  4 ++--
 src/vkvg_surface.c          | 36 ++++++++++++++++++++++++++++++------
 src/vkvg_surface_internal.h |  6 ++++--
 4 files changed, 41 insertions(+), 10 deletions(-)

diff --git a/include/vkvg.h b/include/vkvg.h
index 3483a1e..164ef61 100644
--- a/include/vkvg.h
+++ b/include/vkvg.h
@@ -789,6 +789,11 @@ void vkvg_surface_destroy (VkvgSurface surf);
  */
 vkvg_public
 vkvg_status_t vkvg_surface_status (VkvgSurface surf);
+/**
+ * @brief Resize the surface.
+ */
+vkvg_public
+void vkvg_surface_resize(VkvgSurface surf, uint32_t width, uint32_t height);
 /**
  * @brief Clear surface's content.
  *
diff --git a/src/vkvg_context.c b/src/vkvg_context.c
index ea5b1f5..a88f71b 100644
--- a/src/vkvg_context.c
+++ b/src/vkvg_context.c
@@ -47,7 +47,7 @@ void _init_ctx (VkvgContext ctx) {
 	ctx->miterLimit		= 10;
 	ctx->curOperator	= VKVG_OPERATOR_OVER;
 	ctx->curFillRule	= VKVG_FILL_RULE_NON_ZERO;
-	ctx->bounds = (VkRect2D) {{0,0},{ctx->pSurf->width,ctx->pSurf->height}};
+	ctx->bounds = (VkRect2D) { {0,0}, { ctx->pSurf->width, ctx->pSurf->height } };
 	ctx->pushConsts = (push_constants) {
 			{.a = 1},
 			{(float)ctx->pSurf->width,(float)ctx->pSurf->height},
@@ -575,7 +575,7 @@ void _curve_to (VkvgContext ctx, float x1, float y1, float x2, float y2, float x
 	//compute dyn distanceTolerance depending on current scale
 	float sx = 1, sy = 1;
 	vkvg_matrix_get_scale (&ctx->pushConsts.mat, &sx, &sy);
-	float distanceTolerance = fabs(0.25f / fmaxf(sx,sy));
+	float distanceTolerance = fabs(0.01f / fmaxf(sx,sy));
 
 	_recursive_bezier (ctx, distanceTolerance, cp.x, cp.y, x1, y1, x2, y2, x3, y3, 0);
 	/*cp.x = x3;
diff --git a/src/vkvg_surface.c b/src/vkvg_surface.c
index 369adbd..c70e2aa 100644
--- a/src/vkvg_surface.c
+++ b/src/vkvg_surface.c
@@ -65,8 +65,8 @@ VkvgSurface vkvg_surface_create (VkvgDevice dev, uint32_t width, uint32_t height
 	if (surf->status)
 		return surf;
 
-	surf->width = MAX(1, width);
-	surf->height = MAX(1, height);
+	surf->imgWidth = surf->width = MAX(1, width);
+	surf->imgHeight = surf->height = MAX(1, height);
 	surf->newSurf = true;//used to clear all attacments on first render pass
 
 	_create_surface_images (surf);
@@ -88,8 +88,8 @@ VkvgSurface vkvg_surface_create_for_VkhImage (VkvgDevice dev, void* vkhImg) {
 	}
 
 	VkhImage img = (VkhImage)vkhImg;
-	surf->width = img->infos.extent.width;
-	surf->height= img->infos.extent.height;
+	surf->imgWidth = img->infos.extent.width;
+	surf->imgHeight = img->infos.extent.height;
 
 	surf->img = img;
 
@@ -116,8 +116,8 @@ VkvgSurface vkvg_surface_create_from_bitmap (VkvgDevice dev, unsigned char* img,
 		return surf;
 	}
 
-	surf->width = MAX(1, width);
-	surf->height = MAX(1, height);
+	surf->imgWidth = surf->width = MAX(1, width);
+	surf->imgHeight = surf->height = MAX(1, height);
 
 	_create_surface_images (surf);
 
@@ -275,7 +275,31 @@ uint32_t vkvg_surface_get_reference_count (VkvgSurface surf) {
 		return 0;
 	return surf->references;
 }
+void vkvg_surface_resize(VkvgSurface surf, uint32_t width, uint32_t height) {
+	if (surf->status)
+		return;
+
+	surf->width = MAX(1, width);
+	surf->height = MAX(1, height);
+
+	vkDestroyFramebuffer(surf->dev->vkDev, surf->fb, NULL);
+
+	if (width > surf->imgWidth || height > surf->imgHeight) {
+		if (!surf->img->imported)
+			vkh_image_destroy(surf->img);
+		vkh_image_destroy(surf->imgMS);
+		vkh_image_destroy(surf->stencil);
 
+		surf->newSurf = true;//used to clear all attacments on first render pass
+		_create_surface_images (surf);
+		_transition_surf_images (surf);
+
+		surf->imgWidth = surf->width;
+		surf->imgHeight = surf->height;
+	}
+
+	_create_framebuffer (surf);
+}
 VkImage vkvg_surface_get_vk_image(VkvgSurface surf)
 {
 	if (surf->status)
diff --git a/src/vkvg_surface_internal.h b/src/vkvg_surface_internal.h
index 5cc47c6..f89573f 100644
--- a/src/vkvg_surface_internal.h
+++ b/src/vkvg_surface_internal.h
@@ -30,8 +30,10 @@ typedef struct _vkvg_surface_t {
 	vkvg_status_t	status;					/**< Current status of surface, affected by last operation */
 	uint32_t		references;
 	VkvgDevice		dev;
-	uint32_t		width;
-	uint32_t		height;
+	uint32_t		width;					/**< surface width, underlying vulkan image may be larger */
+	uint32_t		height;					/**< surface height, underlying vulkan image may be larger */
+	uint32_t		imgWidth;				/**< physical surface image width */
+	uint32_t		imgHeight;				/**< physical surface image height */
 	VkFormat		format;
 	VkFramebuffer	fb;
 	VkhImage		img;
-- 
2.47.3