From 57222cc64c9c83b5136dbb18c1ac723822db9794 Mon Sep 17 00:00:00 2001
From: Benjamin Otte <otte@redhat.com>
Date: Fri, 12 May 2023 03:59:44 +0200
Subject: [PATCH] vulkan: Add scale to push constants

This way, it can be pushed to the shaders
---
 gsk/vulkan/gskvulkanpushconstants.c        | 6 +++++-
 gsk/vulkan/gskvulkanpushconstantsprivate.h | 1 +
 gsk/vulkan/gskvulkanrenderpass.c           | 3 +++
 gsk/vulkan/resources/constants.glsl        | 1 +
 4 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/gsk/vulkan/gskvulkanpushconstants.c b/gsk/vulkan/gskvulkanpushconstants.c
index 456fff712b..ebc38275bb 100644
--- a/gsk/vulkan/gskvulkanpushconstants.c
+++ b/gsk/vulkan/gskvulkanpushconstants.c
@@ -12,6 +12,7 @@ struct _GskVulkanPushConstantsWire
   struct {
     float mvp[16];
     float clip[12];
+    float scale[2];
   } common;
 };
 
@@ -23,22 +24,25 @@ G_STATIC_ASSERT (sizeof (GskVulkanPushConstantsWire) <= 128);
 
 static void
 gsk_vulkan_push_constants_wire_init (GskVulkanPushConstantsWire *wire,
+                                     const graphene_vec2_t      *scale,
                                      const graphene_matrix_t    *mvp,
                                      const GskRoundedRect       *clip)
 {
   graphene_matrix_to_float (mvp, wire->common.mvp);
   gsk_rounded_rect_to_float (clip, graphene_point_zero (), wire->common.clip);
+  graphene_vec2_to_float (scale, wire->common.scale);
 }
 
 void
 gsk_vulkan_push_constants_push (VkCommandBuffer          command_buffer,
                                 VkPipelineLayout         pipeline_layout,
+                                const graphene_vec2_t   *scale,
                                 const graphene_matrix_t *mvp,
                                 const GskRoundedRect    *clip)
 {
   GskVulkanPushConstantsWire wire;
 
-  gsk_vulkan_push_constants_wire_init (&wire, mvp, clip);
+  gsk_vulkan_push_constants_wire_init (&wire, scale, mvp, clip);
 
   vkCmdPushConstants (command_buffer,
                       pipeline_layout,
diff --git a/gsk/vulkan/gskvulkanpushconstantsprivate.h b/gsk/vulkan/gskvulkanpushconstantsprivate.h
index 6b8470d674..1e04e50154 100644
--- a/gsk/vulkan/gskvulkanpushconstantsprivate.h
+++ b/gsk/vulkan/gskvulkanpushconstantsprivate.h
@@ -12,6 +12,7 @@ uint32_t                gsk_vulkan_push_constants_get_range_count       (void) G
 
 void                    gsk_vulkan_push_constants_push                  (VkCommandBuffer                 command_buffer,
                                                                          VkPipelineLayout                pipeline_layout,
+                                                                         const graphene_vec2_t          *scale,
                                                                          const graphene_matrix_t        *mvp,
                                                                          const GskRoundedRect           *clip);
 
diff --git a/gsk/vulkan/gskvulkanrenderpass.c b/gsk/vulkan/gskvulkanrenderpass.c
index 93a6dd3024..ffe9e5bc3d 100644
--- a/gsk/vulkan/gskvulkanrenderpass.c
+++ b/gsk/vulkan/gskvulkanrenderpass.c
@@ -99,6 +99,7 @@ struct _GskVulkanOpPushConstants
 {
   GskVulkanOpType         type;
   GskRenderNode          *node; /* node that's the source of this op */
+  graphene_vec2_t         scale;
   graphene_matrix_t       mvp;
   GskRoundedRect          clip;
 };
@@ -250,6 +251,7 @@ gsk_vulkan_render_pass_append_push_constants (GskVulkanRenderPass       *self,
   GskVulkanOp op = {
     .constants.type = GSK_VULKAN_OP_PUSH_VERTEX_CONSTANTS,
     .constants.node = node,
+    .constants.scale= state->scale,
     .constants.mvp = state->mvp,
     .constants.clip = state->clip.rect,
   };
@@ -2268,6 +2270,7 @@ gsk_vulkan_render_pass_draw_rect (GskVulkanRenderPass     *self,
           for (int j = 0; j < layout_count; j++)
             gsk_vulkan_push_constants_push (command_buffer,
                                             pipeline_layout[j],
+                                            &op->constants.scale,
                                             &op->constants.mvp,
                                             &op->constants.clip);
 
diff --git a/gsk/vulkan/resources/constants.glsl b/gsk/vulkan/resources/constants.glsl
index 427f42bc1a..9fe24ad475 100644
--- a/gsk/vulkan/resources/constants.glsl
+++ b/gsk/vulkan/resources/constants.glsl
@@ -6,6 +6,7 @@ layout(push_constant) uniform PushConstants {
     vec4 clip_bounds;
     vec4 clip_widths;
     vec4 clip_heights;
+    vec2 scale;
 } push;
 
 #endif