GPU: Refactored +cleanup compilation log parsing.

Old implementation has a single parser of many different
formats. With the introduction of Vulkan this would lead
to another parser in the same function. This patch
separates the log parsing using a visitor pattern so the
log parsing can be configured per GPU backend or even
per driver.

With Vulkan we manage the compiler our self so the parsing
will become more straight forward. The OpenGL part depends
on many factors (OS, Driver) and perhaps even GPU.

1 files changed, 38 insertions, 1 deletions

diff --git a/source/blender/gpu/intern/gpu_shader_private.hh b/source/blender/gpu/intern/gpu_shader_private.hh
index 281f01dbc22..ebdfc3478f8 100644
--- a/source/blender/gpu/intern/gpu_shader_private.hh
+++ b/source/blender/gpu/intern/gpu_shader_private.hh
@@ -29,6 +29,8 @@
 namespace blender {
 namespace gpu {
 
+class GPULogParser;
+
 /**
  * Implementation of shader compilation and uniforms handling.
  * Base class which is then specialized for each implementation (GL, VK, ...).
@@ -74,7 +76,11 @@ class Shader {
   };
 
  protected:
-  void print_log(Span<const char *> sources, char *log, const char *stage, const bool error);
+  void print_log(Span<const char *> sources,
+                 char *log,
+                 const char *stage,
+                 const bool error,
+                 GPULogParser *parser);
 };
 
 /* Syntactic sugar. */
@@ -91,6 +97,37 @@ static inline const Shader *unwrap(const GPUShader *vert)
   return reinterpret_cast<const Shader *>(vert);
 }
 
+enum class Severity {
+  Unknown,
+  Warning,
+  Error,
+};
+
+struct LogCursor {
+  int source = -1;
+  int row = -1;
+  int column = -1;
+};
+
+struct GPULogItem {
+  LogCursor cursor;
+  Severity severity = Severity::Unknown;
+};
+
+class GPULogParser {
+ public:
+  virtual char *parse_line(char *log_line, GPULogItem &log_item) = 0;
+
+ protected:
+  char *skip_severity(char *log_line,
+                      GPULogItem &log_item,
+                      const char *error_msg,
+                      const char *warning_msg) const;
+  char *skip_separators(char *log_line, char sep1, char sep2, char sep3) const;
+
+  MEM_CXX_CLASS_ALLOC_FUNCS("GPULogParser");
+};
+
 }  // namespace gpu
 }  // namespace blender