From 55fcca306b349a959feecae8f84a6b62f532114f Mon Sep 17 00:00:00 2001
From: Jason Ekstrand <jason.ekstrand@intel.com>
Date: Wed, 7 Oct 2015 09:31:53 -0700
Subject: [PATCH] anv: Add a dynamic state data structure and basic helpers

---
 src/vulkan/anv_cmd_buffer.c | 72 +++++++++++++++++++++++++++++++++++++
 src/vulkan/anv_private.h    | 56 +++++++++++++++++++++++++++--
 2 files changed, 125 insertions(+), 3 deletions(-)

diff --git a/src/vulkan/anv_cmd_buffer.c b/src/vulkan/anv_cmd_buffer.c
index 7587f2ed103..78b17ea15ee 100644
--- a/src/vulkan/anv_cmd_buffer.c
+++ b/src/vulkan/anv_cmd_buffer.c
@@ -38,6 +38,78 @@
  * is concerned, most of anv_cmd_buffer is magic.
  */
 
+/* TODO: These are taken from GLES.  We should check the Vulkan spec */
+const struct anv_dynamic_state default_dynamic_state = {
+   .viewport = {
+      .count = 0,
+   },
+   .scissor = {
+      .count = 0,
+   },
+   .line_width = 1.0f,
+   .depth_bias = {
+      .bias = 0.0f,
+      .clamp = 0.0f,
+      .slope_scaled = 0.0f,
+   },
+   .blend_constants = { 0.0f, 0.0f, 0.0f, 0.0f },
+   .depth_bounds = {
+      .min = 0.0f,
+      .max = 1.0f,
+   },
+   .stencil_compare_mask = {
+      .front = ~0u,
+      .back = ~0u,
+   },
+   .stencil_write_mask = {
+      .front = ~0u,
+      .back = ~0u,
+   },
+   .stencil_reference = {
+      .front = 0u,
+      .back = 0u,
+   },
+};
+
+void
+anv_dynamic_state_copy(struct anv_dynamic_state *dest,
+                       const struct anv_dynamic_state *src,
+                       uint32_t copy_mask)
+{
+   if (copy_mask & (1 << VK_DYNAMIC_STATE_VIEWPORT)) {
+      dest->viewport.count = src->viewport.count;
+      typed_memcpy(dest->viewport.viewports, src->viewport.viewports,
+                   src->viewport.count);
+   }
+
+   if (copy_mask & (1 << VK_DYNAMIC_STATE_SCISSOR)) {
+      dest->scissor.count = src->scissor.count;
+      typed_memcpy(dest->scissor.scissors, src->scissor.scissors,
+                   src->scissor.count);
+   }
+
+   if (copy_mask & (1 << VK_DYNAMIC_STATE_LINE_WIDTH))
+      dest->line_width = src->line_width;
+
+   if (copy_mask & (1 << VK_DYNAMIC_STATE_DEPTH_BIAS))
+      dest->depth_bias = src->depth_bias;
+
+   if (copy_mask & (1 << VK_DYNAMIC_STATE_BLEND_CONSTANTS))
+      typed_memcpy(dest->blend_constants, src->blend_constants, 4);
+
+   if (copy_mask & (1 << VK_DYNAMIC_STATE_DEPTH_BOUNDS))
+      dest->depth_bounds = src->depth_bounds;
+
+   if (copy_mask & (1 << VK_DYNAMIC_STATE_STENCIL_COMPARE_MASK))
+      dest->stencil_compare_mask = src->stencil_compare_mask;
+
+   if (copy_mask & (1 << VK_DYNAMIC_STATE_STENCIL_WRITE_MASK))
+      dest->stencil_write_mask = src->stencil_write_mask;
+
+   if (copy_mask & (1 << VK_DYNAMIC_STATE_STENCIL_REFERENCE))
+      dest->stencil_reference = src->stencil_reference;
+}
+
 static void
 anv_cmd_state_init(struct anv_cmd_state *state)
 {
diff --git a/src/vulkan/anv_private.h b/src/vulkan/anv_private.h
index ac9422f6b90..047c1cf4355 100644
--- a/src/vulkan/anv_private.h
+++ b/src/vulkan/anv_private.h
@@ -763,9 +763,11 @@ void
 anv_descriptor_set_destroy(struct anv_device *device,
                            struct anv_descriptor_set *set);
 
-#define MAX_VBS   32
-#define MAX_SETS   8
-#define MAX_RTS    8
+#define MAX_VBS         32
+#define MAX_SETS         8
+#define MAX_RTS          8
+#define MAX_VIEWPORTS   16
+#define MAX_SCISSORS    16
 #define MAX_PUSH_CONSTANTS_SIZE 128
 #define MAX_DYNAMIC_BUFFERS 16
 #define MAX_IMAGES 8
@@ -839,6 +841,54 @@ struct anv_push_constants {
    struct brw_image_param images[MAX_IMAGES];
 };
 
+struct anv_dynamic_state {
+   struct {
+      uint32_t                                  count;
+      VkViewport                                viewports[MAX_VIEWPORTS];
+   } viewport;
+
+   struct {
+      uint32_t                                  count;
+      VkRect2D                                  scissors[MAX_SCISSORS];
+   } scissor;
+
+   float                                        line_width;
+
+   struct {
+      float                                     bias;
+      float                                     clamp;
+      float                                     slope_scaled;
+   } depth_bias;
+
+   float                                        blend_constants[4];
+
+   struct {
+      float                                     min;
+      float                                     max;
+   } depth_bounds;
+
+   struct {
+      uint32_t                                  front;
+      uint32_t                                  back;
+   } stencil_compare_mask;
+
+   struct {
+      uint32_t                                  front;
+      uint32_t                                  back;
+   } stencil_write_mask;
+
+   struct {
+      uint32_t                                  front;
+      uint32_t                                  back;
+   } stencil_reference;
+};
+
+extern const struct anv_dynamic_state default_dynamic_state;
+
+void anv_dynamic_state_copy(struct anv_dynamic_state *dest,
+                            const struct anv_dynamic_state *src,
+                            uint32_t copy_mask);
+
 /** State required while building cmd buffer */
 struct anv_cmd_state {
    uint32_t                                     current_pipeline;
-- 
2.30.2