[gtk/wip/chergert/glproto: 849/920] decode uniform data when dumping batch info

[Christian Hergert <chergert src gnome org>]

commit 4e60b7b1d94f7eaab49b6e0bf2b3174a3e697c10
Author: Christian Hergert <chergert redhat com>
Date:   Mon Feb 1 22:09:42 2021 -0800

    decode uniform data when dumping batch info
    
    This lets us get information like the following if you print the batch
    details.
    
    Batch {
             Kind: Draw
         Viewport: 1200x1000
      Framebuffer: 0
          Program: 30
      Uniform[00]: 
matrix<0.0016670.0000000.0000000.0000000.000000-0.0020000.0000000.0000000.0000000.000000-0.0001000.000000-1.0000001.0000000.0000001.000000>
      Uniform[01]: 
matrix<2.0000000.0000000.0000000.0000000.0000002.0000000.0000000.0000000.0000000.0000001.0000000.0000000.0000000.0000000.0000001.000000>
      Uniform[02]: 1f<1.000000>
      Uniform[03]: rgb(213,208,204)
      Uniform[04]: 1f<1.000000>
      Uniform[05]: 2f<0.000000,0.000000>
      Uniform[06]: GskRoundedRect 0x231e920: Bounds: (345.000000, 29.000000, 134.000000, 34.000000) Corners: 
(0.000000, 0.000000) (5.000000, 5.000000) (5.000000, 5.000000) (0.000000, 0.000000)
      Uniform[09]: 4f<0.000000,0.000000,1200.000000,1000.000000>
      Uniform[10]: GskRoundedRect 0x231e8c0: Bounds: (52.000000, 46.000000, 1012.000000, 772.000000) Corners: 
(16.000000, 16.000000) (16.000000, 16.000000) (0.000000, 0.000000) (0.000000, 0.000000)
    }

 gsk/next/gskglcommandqueue.c | 107 ++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 105 insertions(+), 2 deletions(-)
---
diff --git a/gsk/next/gskglcommandqueue.c b/gsk/next/gskglcommandqueue.c
index e04c6037ee..2db4a5d0ef 100644
--- a/gsk/next/gskglcommandqueue.c
+++ b/gsk/next/gskglcommandqueue.c
@@ -26,6 +26,7 @@
 #include <gdk/gdkglcontextprivate.h>
 #include <gdk/gdkmemorytextureprivate.h>
 #include <gsk/gskdebugprivate.h>
+#include <gsk/gskroundedrectprivate.h>
 #include <epoxy/gl.h>
 #include <string.h>
 
@@ -165,6 +166,105 @@ G_STATIC_ASSERT (sizeof (GskGLCommandBatch) == 32);
 
 G_DEFINE_TYPE (GskGLCommandQueue, gsk_gl_command_queue, G_TYPE_OBJECT)
 
+static inline void
+print_uniform (GskGLUniformFormat format,
+               guint              array_count,
+               gconstpointer      valueptr)
+{
+  const union {
+    graphene_matrix_t matrix[0];
+    GskRoundedRect rounded_rect[0];
+    float fval[0];
+    int ival[0];
+    guint uval[0];
+  } *data = valueptr;
+
+  switch (format)
+    {
+    case GSK_GL_UNIFORM_FORMAT_1F:
+      g_print ("1f<%f>", data->fval[0]);
+      break;
+
+    case GSK_GL_UNIFORM_FORMAT_2F:
+      g_print ("2f<%f,%f>", data->fval[0], data->fval[1]);
+      break;
+
+    case GSK_GL_UNIFORM_FORMAT_3F:
+      g_print ("3f<%f,%f,%f>", data->fval[0], data->fval[1], data->fval[2]);
+      break;
+
+    case GSK_GL_UNIFORM_FORMAT_4F:
+      g_print ("4f<%f,%f,%f,%f>", data->fval[0], data->fval[1], data->fval[2], data->fval[3]);
+      break;
+
+    case GSK_GL_UNIFORM_FORMAT_1I:
+    case GSK_GL_UNIFORM_FORMAT_TEXTURE:
+      g_print ("1i<%d>", data->ival[0]);
+      break;
+
+    case GSK_GL_UNIFORM_FORMAT_1UI:
+      g_print ("1ui<%u>", data->uval[0]);
+      break;
+
+    case GSK_GL_UNIFORM_FORMAT_COLOR: {
+      char *str = gdk_rgba_to_string (valueptr);
+      g_print ("%s", str);
+      g_free (str);
+      break;
+    }
+
+    case GSK_GL_UNIFORM_FORMAT_ROUNDED_RECT: {
+      char *str = gsk_rounded_rect_to_string (valueptr);
+      g_print ("%s", str);
+      g_free (str);
+      break;
+    }
+
+    case GSK_GL_UNIFORM_FORMAT_MATRIX: {
+      float mat[16];
+      graphene_matrix_to_float (&data->matrix[0], mat);
+      g_print ("matrix<");
+      for (guint i = 0; i < G_N_ELEMENTS (mat)-1; i++)
+        g_print ("%f", mat[i]);
+      g_print ("%f>", mat[G_N_ELEMENTS (mat)-1]);
+      break;
+    }
+
+    case GSK_GL_UNIFORM_FORMAT_1FV:
+    case GSK_GL_UNIFORM_FORMAT_2FV:
+    case GSK_GL_UNIFORM_FORMAT_3FV:
+    case GSK_GL_UNIFORM_FORMAT_4FV:
+      /* non-V variants are -4 from V variants */
+      format -= 4;
+      g_print ("[");
+      for (guint i = 0; i < array_count; i++)
+        {
+          print_uniform (format, 0, valueptr);
+          if (i + 1 != array_count)
+            g_print (",");
+          valueptr = ((guint8*)valueptr + gsk_gl_uniform_format_size (format));
+        }
+      g_print ("]");
+      break;
+
+    case GSK_GL_UNIFORM_FORMAT_2I:
+      g_print ("2i<%d,%d>", data->ival[0], data->ival[1]);
+      break;
+
+    case GSK_GL_UNIFORM_FORMAT_3I:
+      g_print ("3i<%d,%d,%d>", data->ival[0], data->ival[1], data->ival[2]);
+      break;
+
+    case GSK_GL_UNIFORM_FORMAT_4I:
+      g_print ("3i<%d,%d,%d,%d>", data->ival[0], data->ival[1], data->ival[2], data->ival[3]);
+      break;
+
+    case GSK_GL_UNIFORM_FORMAT_LAST:
+    default:
+      g_assert_not_reached ();
+    }
+}
+
 static inline void
 gsk_gl_command_queue_print_batch (GskGLCommandQueue       *self,
                                   const GskGLCommandBatch *batch)
@@ -199,9 +299,12 @@ gsk_gl_command_queue_print_batch (GskGLCommandQueue       *self,
 
       for (guint i = 0; i < batch->draw.uniform_count; i++)
         {
-          /* TODO: We could decode the format to print them too */
           const GskGLCommandUniform *uniform = &g_array_index (self->batch_uniforms, GskGLCommandUniform, 
batch->draw.uniform_offset + i);
-          g_print ("  Uniform[%02d]: \n", uniform->location);
+          g_print ("  Uniform[%02d]: ", uniform->location);
+          print_uniform (uniform->info.format,
+                         uniform->info.array_count,
+                         gsk_gl_uniform_state_get_uniform_data (self->uniforms, uniform->info.offset));
+          g_print ("\n");
         }
     }