[gtk/wip/matthiasc/vao-in-place] gl: Drop buffer_size

[Matthias Clasen <matthiasc src gnome org>]

commit f284da1735418323d33daa2f22e7721526ec5e77
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Oct 11 14:10:56 2019 -0400

    gl: Drop buffer_size
    
    No need to maintain buffer_size separately.
    It is always vertices->len * sizeof (GskQuadVertex).

 gsk/gl/gskglrenderer.c         | 8 +++-----
 gsk/gl/gskglrenderops.c        | 6 +-----
 gsk/gl/gskglrenderopsprivate.h | 2 --
 3 files changed, 4 insertions(+), 12 deletions(-)
---
diff --git a/gsk/gl/gskglrenderer.c b/gsk/gl/gskglrenderer.c
index 4380622aea..cb36f8c245 100644
--- a/gsk/gl/gskglrenderer.c
+++ b/gsk/gl/gskglrenderer.c
@@ -2988,10 +2988,10 @@ add_offscreen_ops (GskGLRenderer         *self,
 }
 
 static void
-gsk_gl_renderer_render_ops (GskGLRenderer *self,
-                            gsize          vertex_data_size)
+gsk_gl_renderer_render_ops (GskGLRenderer *self)
 {
   const Program *program = NULL;
+  gsize vertex_data_size = self->op_builder.vertices->len * sizeof (GskQuadVertex);
   float *vertex_data = (float*)self->op_builder.vertices->data;
   OpBufferIter iter;
   OpKind kind;
@@ -3189,7 +3189,6 @@ gsk_gl_renderer_do_render (GskRenderer           *renderer,
 {
   GskGLRenderer *self = GSK_GL_RENDERER (renderer);
   graphene_matrix_t projection;
-  gsize buffer_size;
 #ifdef G_ENABLE_DEBUG
   GskProfiler *profiler;
   gint64 gpu_time, cpu_time, start_time;
@@ -3266,7 +3265,6 @@ gsk_gl_renderer_do_render (GskRenderer           *renderer,
   g_assert_cmpint (self->op_builder.current_render_target, ==, fbo_id);
   ops_pop_modelview (&self->op_builder);
   ops_pop_clip (&self->op_builder);
-  buffer_size = self->op_builder.buffer_size;
   ops_finish (&self->op_builder);
 
   /*g_message ("Ops: %u", self->render_ops->len);*/
@@ -3294,7 +3292,7 @@ gsk_gl_renderer_do_render (GskRenderer           *renderer,
   glBlendEquation (GL_FUNC_ADD);
 
   gdk_gl_context_push_debug_group (self->gl_context, "Rendering ops");
-  gsk_gl_renderer_render_ops (self, buffer_size);
+  gsk_gl_renderer_render_ops (self);
   gdk_gl_context_pop_debug_group (self->gl_context);
 
 #ifdef G_ENABLE_DEBUG
diff --git a/gsk/gl/gskglrenderops.c b/gsk/gl/gskglrenderops.c
index 724aacfa42..4c6e2a7b35 100644
--- a/gsk/gl/gskglrenderops.c
+++ b/gsk/gl/gskglrenderops.c
@@ -28,7 +28,6 @@ ops_finish (RenderOpBuilder *builder)
     g_array_free (builder->clip_stack, TRUE);
   builder->clip_stack = NULL;
 
-  builder->buffer_size = 0;
   builder->dx = 0;
   builder->dy = 0;
   builder->current_modelview = NULL;
@@ -690,15 +689,12 @@ ops_draw (RenderOpBuilder     *builder,
     }
   else
     {
-      gsize offset = builder->buffer_size / sizeof (GskQuadVertex);
-
       op = op_buffer_add (&builder->render_ops, OP_DRAW);
-      op->vao_offset = offset;
+      op->vao_offset = builder->vertices->len;
       op->vao_size = GL_N_VERTICES;
     }
 
   g_array_append_vals (builder->vertices, vertex_data, GL_N_VERTICES);
-  builder->buffer_size += sizeof (GskQuadVertex) * GL_N_VERTICES;
 }
 
 /* The offset is only valid for the current modelview.
diff --git a/gsk/gl/gskglrenderopsprivate.h b/gsk/gl/gskglrenderopsprivate.h
index f01097b65f..e555653617 100644
--- a/gsk/gl/gskglrenderopsprivate.h
+++ b/gsk/gl/gskglrenderopsprivate.h
@@ -153,8 +153,6 @@ typedef struct
   float current_opacity;
   float dx, dy;
 
-  gsize buffer_size;
-
   OpBuffer render_ops;
   GArray *vertices;