From 3bf85cc55d662c218e371a03040c4cd5c3cca771 Mon Sep 17 00:00:00 2001
From: Bruno de Oliveira Abinader <bruno@mapbox.com>
Date: Sun, 19 Jun 2016 19:25:33 +0300
Subject: [core] Added StaticRasterVertexBuffer

---
 src/mbgl/geometry/static_vertex_buffer.cpp | 18 ++++++++++++----
 src/mbgl/geometry/static_vertex_buffer.hpp | 17 ++++++++++-----
 src/mbgl/renderer/painter.cpp              |  1 +
 src/mbgl/renderer/painter.hpp              | 33 ++++++++++++++++++------------
 4 files changed, 47 insertions(+), 22 deletions(-)

(limited to 'src')

diff --git a/src/mbgl/geometry/static_vertex_buffer.cpp b/src/mbgl/geometry/static_vertex_buffer.cpp
index 254b01b6b6..c66b194748 100644
--- a/src/mbgl/geometry/static_vertex_buffer.cpp
+++ b/src/mbgl/geometry/static_vertex_buffer.cpp
@@ -3,11 +3,21 @@
 
 namespace mbgl {
 
-StaticVertexBuffer::StaticVertexBuffer(std::initializer_list<std::pair<int16_t, int16_t>> init) {
+StaticVertexBuffer::StaticVertexBuffer(std::initializer_list<std::array<VertexType, 2>> init) {
     for (const auto& vertex : init) {
-        vertex_type *vertices = static_cast<vertex_type *>(addElement());
-        vertices[0] = vertex.first;
-        vertices[1] = vertex.second;
+        VertexType* vertices = static_cast<VertexType*>(addElement());
+        vertices[0] = std::get<0>(vertex);
+        vertices[1] = std::get<1>(vertex);
+    }
+}
+
+StaticRasterVertexBuffer::StaticRasterVertexBuffer(std::initializer_list<std::array<VertexType, 4>> init) {
+    for (const auto& vertex : init) {
+        VertexType* vertices = static_cast<VertexType*>(addElement());
+        vertices[0] = std::get<0>(vertex);
+        vertices[1] = std::get<1>(vertex);
+        vertices[2] = std::get<2>(vertex);
+        vertices[3] = std::get<3>(vertex);
     }
 }
 
diff --git a/src/mbgl/geometry/static_vertex_buffer.hpp b/src/mbgl/geometry/static_vertex_buffer.hpp
index 79f6117cbc..2e738afc98 100644
--- a/src/mbgl/geometry/static_vertex_buffer.hpp
+++ b/src/mbgl/geometry/static_vertex_buffer.hpp
@@ -2,10 +2,8 @@
 
 #include <mbgl/geometry/buffer.hpp>
 
-#include <vector>
-#include <cstddef>
+#include <array>
 #include <cstdint>
-#include <cmath>
 
 namespace mbgl {
 
@@ -15,9 +13,18 @@ class StaticVertexBuffer : public Buffer<
     32 // default length
 > {
 public:
-    typedef int16_t vertex_type;
+    using VertexType = int16_t;
+    StaticVertexBuffer(std::initializer_list<std::array<VertexType, 2>>);
+};
 
-    StaticVertexBuffer(std::initializer_list<std::pair<int16_t, int16_t>> init);
+class StaticRasterVertexBuffer : public Buffer<
+    8, // bytes per vertex (4 * signed short == 8 bytes)
+    GL_ARRAY_BUFFER,
+    32 // default length
+> {
+public:
+    using VertexType = int16_t;
+    StaticRasterVertexBuffer(std::initializer_list<std::array<VertexType, 4>>);
 };
 
 } // namespace mbgl
diff --git a/src/mbgl/renderer/painter.cpp b/src/mbgl/renderer/painter.cpp
index 7661d80e9c..0e2cfc30b4 100644
--- a/src/mbgl/renderer/painter.cpp
+++ b/src/mbgl/renderer/painter.cpp
@@ -133,6 +133,7 @@ void Painter::render(const Style& style, const FrameData& frame_, SpriteAtlas& a
         MBGL_DEBUG_GROUP("upload");
 
         tileStencilBuffer.upload(store);
+        rasterBoundsBuffer.upload(store);
         tileBorderBuffer.upload(store);
         spriteAtlas->upload(store);
         lineAtlas->upload(store);
diff --git a/src/mbgl/renderer/painter.hpp b/src/mbgl/renderer/painter.hpp
index 0ea3596775..304132595c 100644
--- a/src/mbgl/renderer/painter.hpp
+++ b/src/mbgl/renderer/painter.hpp
@@ -225,16 +225,23 @@ private:
     std::unique_ptr<CircleShader> circleOverdrawShader;
 
     // Set up the stencil quad we're using to generate the stencil mask.
-    StaticVertexBuffer tileStencilBuffer = {
+    StaticVertexBuffer tileStencilBuffer {
         // top left triangle
-        { 0, 0 },
-        { util::EXTENT, 0 },
-        { 0, util::EXTENT },
+        {{ 0, 0 }},
+        {{ util::EXTENT, 0 }},
+        {{ 0, util::EXTENT }},
 
         // bottom right triangle
-        { util::EXTENT, 0 },
-        { 0, util::EXTENT },
-        { util::EXTENT, util::EXTENT },
+        {{ util::EXTENT, 0 }},
+        {{ 0, util::EXTENT }},
+        {{ util::EXTENT, util::EXTENT }},
+    };
+
+    StaticRasterVertexBuffer rasterBoundsBuffer {
+        {{ 0, 0, 0, 0 }},
+        {{ util::EXTENT, 0, 32767, 0 }},
+        {{ 0, util::EXTENT, 0, 32767 }},
+        {{ util::EXTENT, util::EXTENT, 32767, 32767 }},
     };
 
     VertexArrayObject coveringPlainArray;
@@ -248,12 +255,12 @@ private:
     VertexArrayObject backgroundOverdrawArray;
 
     // Set up the tile boundary lines we're using to draw the tile outlines.
-    StaticVertexBuffer tileBorderBuffer = {
-        { 0, 0 },
-        { util::EXTENT, 0 },
-        { util::EXTENT, util::EXTENT },
-        { 0, util::EXTENT },
-        { 0, 0 },
+    StaticVertexBuffer tileBorderBuffer {
+        {{ 0, 0 }},
+        {{ util::EXTENT, 0 }},
+        {{ util::EXTENT, util::EXTENT }},
+        {{ 0, util::EXTENT }},
+        {{ 0, 0 }},
     };
 
     VertexArrayObject tileBorderArray;
-- 
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