Fix T66860 Crash on opening .blend file from 2.79

This was caused by the preview render of the material property panel being
1px wide. The computed half buffers width were rounded to 0.

3 files changed, 7 insertions, 1 deletions

diff --git a/source/blender/draw/engines/eevee/eevee_depth_of_field.c b/source/blender/draw/engines/eevee/eevee_depth_of_field.c
index d0f544dd3c6..12d70131031 100644
--- a/source/blender/draw/engines/eevee/eevee_depth_of_field.c
+++ b/source/blender/draw/engines/eevee/eevee_depth_of_field.c
@@ -97,6 +97,9 @@ int EEVEE_depth_of_field_init(EEVEE_ViewLayerData *UNUSED(sldata),
 
     int buffer_size[2] = {(int)viewport_size[0] / 2, (int)viewport_size[1] / 2};
 
+    buffer_size[0] = max_ii(1, buffer_size[0]);
+    buffer_size[1] = max_ii(1, buffer_size[1]);
+
     eGPUTextureFormat down_format = DRW_state_draw_background() ? GPU_R11F_G11F_B10F : GPU_RGBA16F;
 
     effects->dof_down_near = DRW_texture_pool_query_2d(
diff --git a/source/blender/draw/engines/eevee/eevee_screen_raytrace.c b/source/blender/draw/engines/eevee/eevee_screen_raytrace.c
index 7b470f9c42a..d53ed239f4e 100644
--- a/source/blender/draw/engines/eevee/eevee_screen_raytrace.c
+++ b/source/blender/draw/engines/eevee/eevee_screen_raytrace.c
@@ -159,6 +159,9 @@ int EEVEE_screen_raytrace_init(EEVEE_ViewLayerData *sldata, EEVEE_Data *vedata)
     const bool high_qual_input = true; /* TODO dither low quality input */
     const eGPUTextureFormat format = (high_qual_input) ? GPU_RGBA16F : GPU_RGBA8;
 
+    tracing_res[0] = max_ii(1, tracing_res[0]);
+    tracing_res[1] = max_ii(1, tracing_res[1]);
+
     /* MRT for the shading pass in order to output needed data for the SSR pass. */
     effects->ssr_specrough_input = DRW_texture_pool_query_2d(
         size_fs[0], size_fs[1], format, &draw_engine_eevee_type);
diff --git a/source/blender/draw/engines/workbench/workbench_effect_dof.c b/source/blender/draw/engines/workbench/workbench_effect_dof.c
index 69d0500f155..22840a2a756 100644
--- a/source/blender/draw/engines/workbench/workbench_effect_dof.c
+++ b/source/blender/draw/engines/workbench/workbench_effect_dof.c
@@ -173,7 +173,7 @@ void workbench_dof_engine_init(WORKBENCH_Data *vedata, Object *camera)
   }
 
   const float *full_size = DRW_viewport_size_get();
-  int size[2] = {full_size[0] / 2, full_size[1] / 2};
+  int size[2] = {max_ii(1, (int)full_size[0] / 2), max_ii(1, (int)full_size[1] / 2)};
 #if 0
   /* NOTE: We Ceil here in order to not miss any edge texel if using a NPO2 texture.  */
   int shrink_h_size[2] = {ceilf(size[0] / 8.0f), size[1]};