GPUShader: Improve error/warning logging experience

Thanks to the new `ShaderCreateInfo` we now include source files without
any modification. This let us query which are the source files passed to the
`print_log` function. The log will now include a file with row and column
number which is interpreted as a link in most IDE.

DEBUG_CONTEXT_LINES will add more lines around the error lines for more
context. This is also useful if the error line is imprecise (because of
driver bugs) and the reported line is not sufficient to know the location
of the error.

The DEBUG_DEPENDENCIES option will display the list of included files in
the shader sources. Note that it will not print generated source.

This commit also fixes some issues with unhelpful logs, bogus row & column
numbers, other error format, and bug if row was 0.

1 files changed, 1 insertions, 0 deletions

diff --git a/source/blender/gpu/intern/gpu_shader_private.hh b/source/blender/gpu/intern/gpu_shader_private.hh
index 3bfecdefba7..93c33811ee0 100644
--- a/source/blender/gpu/intern/gpu_shader_private.hh
+++ b/source/blender/gpu/intern/gpu_shader_private.hh
@@ -120,6 +120,7 @@ struct LogCursor {
 
 struct GPULogItem {
   LogCursor cursor;
+  bool source_base_row = false;
   Severity severity = Severity::Unknown;
 };