[Mesa-dev] [PATCH 3/6] mesa: Add support for GL_NV_fill_rectangle

[Lyude]

Since we don't have the bits required to support this in OpenGLES yet,
this only enables support for OpenGL 4.3.

Signed-off-by: Lyude <lyude at redhat.com>
---
 src/mesa/main/api_validate.c     | 13 +++++++++++++
 src/mesa/main/extensions_table.h |  1 +
 src/mesa/main/mtypes.h           |  1 +
 src/mesa/main/polygon.c          | 15 +++++++++++++--
 4 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/src/mesa/main/api_validate.c b/src/mesa/main/api_validate.c
index 44d164a..bec6407 100644
--- a/src/mesa/main/api_validate.c
+++ b/src/mesa/main/api_validate.c
@@ -609,6 +609,19 @@ _mesa_valid_prim_mode(struct gl_context *ctx, GLenum mode, const char *name)
       }
    }
 
+   /* From the GL_NV_fill_rectangle spec:
+    *
+    * An INVALID_OPERATION error is generated by Begin or any Draw command if
+    * only one of the front and back polygon mode is FILL_RECTANGLE_NV.
+    */
+   if ((ctx->Polygon.FrontMode == GL_FILL_RECTANGLE_NV) !=
+       (ctx->Polygon.BackMode == GL_FILL_RECTANGLE_NV)) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "GL_NV_fill_rectangle can only be used on both the front "
+                  "and back polygon mode, not one or the other");
+      return GL_FALSE;
+   }
+
    return GL_TRUE;
 }
 
diff --git a/src/mesa/main/extensions_table.h b/src/mesa/main/extensions_table.h
index ec71791..f2eac2b 100644
--- a/src/mesa/main/extensions_table.h
+++ b/src/mesa/main/extensions_table.h
@@ -320,6 +320,7 @@ EXT(NV_conditional_render                   , NV_conditional_render
 EXT(NV_depth_clamp                          , ARB_depth_clamp                        , GLL, GLC,  x ,  x , 2001)
 EXT(NV_draw_buffers                         , dummy_true                             ,  x ,  x ,  x , ES2, 2011)
 EXT(NV_fbo_color_attachments                , dummy_true                             ,  x ,  x ,  x , ES2, 2010)
+EXT(NV_fill_rectangle                       , NV_fill_rectangle                      , GLL, GLC,  x ,  x , 2015)
 EXT(NV_fog_distance                         , NV_fog_distance                        , GLL,  x ,  x ,  x , 2001)
 EXT(NV_image_formats                        , ARB_shader_image_load_store            ,  x ,  x ,  x ,  31, 2014)
 EXT(NV_light_max_exponent                   , dummy_true                             , GLL,  x ,  x ,  x , 1999)
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index be78b96..88b8e2b 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -4016,6 +4016,7 @@ struct gl_extensions
    GLboolean MESA_shader_integer_functions;
    GLboolean MESA_ycbcr_texture;
    GLboolean NV_conditional_render;
+   GLboolean NV_fill_rectangle;
    GLboolean NV_fog_distance;
    GLboolean NV_point_sprite;
    GLboolean NV_primitive_restart;
diff --git a/src/mesa/main/polygon.c b/src/mesa/main/polygon.c
index 60af88f..2b57f36 100644
--- a/src/mesa/main/polygon.c
+++ b/src/mesa/main/polygon.c
@@ -131,8 +131,19 @@ _mesa_PolygonMode( GLenum face, GLenum mode )
                   _mesa_enum_to_string(face),
                   _mesa_enum_to_string(mode));
 
-   if (mode!=GL_POINT && mode!=GL_LINE && mode!=GL_FILL) {
-      _mesa_error( ctx, GL_INVALID_ENUM, "glPolygonMode(mode)" );
+   switch (mode) {
+   case GL_POINT:
+   case GL_LINE:
+   case GL_FILL:
+      break;
+   case GL_FILL_RECTANGLE_NV:
+      if (!ctx->Extensions.NV_fill_rectangle) {
+         _mesa_error(ctx, GL_INVALID_ENUM, "glPolygonMode(mode)");
+         return;
+      }
+      break;
+   default:
+      _mesa_error(ctx, GL_INVALID_ENUM, "glPolygonMode(mode)");
       return;
    }
 
-- 
2.9.3