From: Rich Geldreich <richgel99@gmail.com>
Date: Wed, 19 Mar 2014 21:06:30 +0000 (-0700)
Subject: - Fixing polygon stipple saving/restoring so it doesn't stomp memory after the polygo... 
X-Git-Url: https://git.cworth.org/git?p=vogl;a=commitdiff_plain;h=048eec5a4b5387c0b14b2a417de0649e3c8461cd

- Fixing polygon stipple saving/restoring so it doesn't stomp memory after the polygon stipple object (whoops!)
---

diff --git a/src/voglcommon/vogl_general_context_state.cpp b/src/voglcommon/vogl_general_context_state.cpp
index ef3db73..d2d25a4 100644
--- a/src/voglcommon/vogl_general_context_state.cpp
+++ b/src/voglcommon/vogl_general_context_state.cpp
@@ -2630,8 +2630,10 @@ bool vogl_polygon_stipple_state::snapshot(const vogl_context_info &context_info)
 
     clear();
 
-    GL_ENTRYPOINT(glGetPolygonStipple)(reinterpret_cast<GLubyte *>(m_pattern));
+    vogl_scoped_state_saver pixelstore_state_saver(cGSTPixelStore);
+    vogl_reset_pixel_store_states();
 
+    GL_ENTRYPOINT(glGetPolygonStipple)(m_pattern);
     VOGL_CHECK_GL_ERROR;
 
     m_valid = true;
@@ -2650,8 +2652,10 @@ bool vogl_polygon_stipple_state::restore(const vogl_context_info &context_info)
 
     VOGL_CHECK_GL_ERROR;
 
-    GL_ENTRYPOINT(glPolygonStipple)(reinterpret_cast<const GLubyte *>(m_pattern));
+    vogl_scoped_state_saver pixelstore_state_saver(cGSTPixelStore);
+    vogl_reset_pixel_store_states();
 
+    GL_ENTRYPOINT(glPolygonStipple)(m_pattern);
     VOGL_CHECK_GL_ERROR;
 
     return true;
@@ -2675,7 +2679,7 @@ bool vogl_polygon_stipple_state::serialize(json_node &node, vogl_blob_manager &b
         return false;
 
     json_node &arr_node = node.add_array("pattern");
-    for (uint i = 0; i < 32; i++)
+    for (uint i = 0; i < VOGL_ARRAY_SIZE(m_pattern); i++)
         arr_node.add_value(m_pattern[i]);
 
     return true;
@@ -2693,11 +2697,19 @@ bool vogl_polygon_stipple_state::deserialize(const json_node &node, const vogl_b
     if (!pArr_node)
         return false;
 
-    if ((pArr_node->size() != 32) || (!pArr_node->are_all_children_values()))
+    if (!pArr_node->are_all_children_values())
         return false;
 
-    for (uint i = 0; i < 32; i++)
-        m_pattern[i] = pArr_node->value_as_uint32(i);
+    // An earlier version wrote the wrong size, so ignore that data.
+    if (pArr_node->size() == VOGL_ARRAY_SIZE(m_pattern))
+    {
+        for (uint i = 0; i < VOGL_ARRAY_SIZE(m_pattern); i++)
+            m_pattern[i] = static_cast<uint8>(pArr_node->value_as_uint32(i));
+    }
+    else
+    {
+        vogl_warning_printf("%s: Polygon stipple data is not valid in this older trace file so it's being ignored - please recapture (sorry)\n", VOGL_METHOD_NAME);
+    }
 
     m_valid = true;
 
@@ -2709,8 +2721,9 @@ uint vogl_polygon_stipple_state::get_num_pattern_rows() const
     return 32;
 }
 
-uint32 vogl_polygon_stipple_state::get_pattern_row(uint rowIndex) const
+uint32 vogl_polygon_stipple_state::get_pattern_row(uint row_index) const
 {
-    VOGL_ASSERT(rowIndex < 32);
-    return m_pattern[rowIndex];
+    VOGL_ASSERT(row_index < 32);
+
+    return m_pattern[4 * row_index] | (m_pattern[4 * row_index + 1] << 8U) | (m_pattern[4 * row_index + 2] << 16U) | (m_pattern[4 * row_index + 3] << 24U);
 }
diff --git a/src/voglcommon/vogl_general_context_state.h b/src/voglcommon/vogl_general_context_state.h
index 7f10c9e..d024b87 100644
--- a/src/voglcommon/vogl_general_context_state.h
+++ b/src/voglcommon/vogl_general_context_state.h
@@ -96,11 +96,11 @@ public:
     bool deserialize(const json_node &node, const vogl_blob_manager &blob_manager);
 
     uint get_num_pattern_rows() const;
-    uint32 get_pattern_row(uint rowIndex) const;
+    uint32 get_pattern_row(uint row_index) const;
 
 private:
     bool m_valid;
-    uint32 m_pattern[32];
+    uint8 m_pattern[32 * 4];
 };
 
 #endif // VOGL_BASIC_CONTEXT_STATE_H