main: Fake entry point for glClearNamedFramebufferiv.

Mesa's ClearBuffer framework is very complicated and thoroughly married to the
object binding model.  Moreover, the OpenGL spec for ClearBuffer is also very
complicated.  At some point, we should implement buffer clearing for arbitrary
framebuffer objects, but for now, we will just wrap ClearBuffer.

Reviewed-by: Fredrik Höglund <fredrik@kde.org>
Signed-off-by: Fredrik Höglund <fredrik@kde.org>

4 files changed, 32 insertions, 0 deletions

diff --git a/src/mapi/glapi/gen/ARB_direct_state_access.xml b/src/mapi/glapi/gen/ARB_direct_state_access.xml
index de77420..c793c9e 100644
--- a/src/mapi/glapi/gen/ARB_direct_state_access.xml
+++ b/src/mapi/glapi/gen/ARB_direct_state_access.xml
@@ -197,6 +197,13 @@
       <param name="height" type="GLsizei" />
    </function>
 
+   <function name="ClearNamedFramebufferiv" offset="assign">
+      <param name="framebuffer" type="GLuint" />
+      <param name="buffer" type="GLenum" />
+      <param name="drawbuffer" type="GLint" />
+      <param name="value" type="const GLint *" />
+   </function>
+
    <function name="BlitNamedFramebuffer" offset="assign">
       <param name="readFramebuffer" type="GLuint" />
       <param name="drawFramebuffer" type="GLuint" />
diff --git a/src/mesa/main/clear.c b/src/mesa/main/clear.c
index 8d707bc..4e029cf 100644
--- a/src/mesa/main/clear.c
+++ b/src/mesa/main/clear.c
@@ -34,6 +34,8 @@
 #include "clear.h"
 #include "context.h"
 #include "enums.h"
+#include "fbobject.h"
+#include "get.h"
 #include "macros.h"
 #include "mtypes.h"
 #include "state.h"
@@ -400,6 +402,24 @@ _mesa_ClearBufferiv(GLenum buffer, GLint drawbuffer, const GLint *value)
 
 
 /**
+ * The ClearBuffer framework is so complicated and so riddled with the
+ * assumption that the framebuffer is bound that, for now, we will just fake
+ * direct state access clearing for the user.
+ */
+void GLAPIENTRY
+_mesa_ClearNamedFramebufferiv(GLuint framebuffer, GLenum buffer,
+                              GLint drawbuffer, const GLint *value)
+{
+   GLint oldfb;
+
+   _mesa_GetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &oldfb);
+   _mesa_BindFramebuffer(GL_DRAW_FRAMEBUFFER, framebuffer);
+   _mesa_ClearBufferiv(buffer, drawbuffer, value);
+   _mesa_BindFramebuffer(GL_DRAW_FRAMEBUFFER, (GLuint) oldfb);
+}
+
+
+/**
  * New in GL 3.0
  * Clear unsigned integer color buffer (not depth, not stencil).
  */
diff --git a/src/mesa/main/clear.h b/src/mesa/main/clear.h
index 96ce47b..d0b6133 100644
--- a/src/mesa/main/clear.h
+++ b/src/mesa/main/clear.h
@@ -52,6 +52,10 @@ extern void GLAPIENTRY
 _mesa_ClearBufferiv(GLenum buffer, GLint drawbuffer, const GLint *value);
 
 extern void GLAPIENTRY
+_mesa_ClearNamedFramebufferiv(GLuint framebuffer, GLenum buffer,
+                              GLint drawbuffer, const GLint *value);
+
+extern void GLAPIENTRY
 _mesa_ClearBufferuiv(GLenum buffer, GLint drawbuffer, const GLuint *value);
 
 extern void GLAPIENTRY
diff --git a/src/mesa/main/tests/dispatch_sanity.cpp b/src/mesa/main/tests/dispatch_sanity.cpp
index e375260..149c8b4 100644
--- a/src/mesa/main/tests/dispatch_sanity.cpp
+++ b/src/mesa/main/tests/dispatch_sanity.cpp
@@ -986,6 +986,7 @@ const struct function gl_core_functions_possible[] = {
    { "glNamedFramebufferTextureLayer", 45, -1 },
    { "glInvalidateNamedFramebufferSubData", 45, -1 },
    { "glInvalidateNamedFramebufferData", 45, -1 },
+   { "glClearNamedFramebufferiv", 45, -1 },
    { "glBlitNamedFramebuffer", 45, -1 },
    { "glCheckNamedFramebufferStatus", 45, -1 },
    { "glGetNamedFramebufferAttachmentParameteriv", 45, -1 },