[Mesa-dev] [PATCH 22/38] main: Add entry point for BlitNamedFramebuffer.

[Laura Ekstrand]

---
 src/mapi/glapi/gen/ARB_direct_state_access.xml | 15 ++++++++
 src/mesa/main/blit.c                           | 50 ++++++++++++++++++++++++++
 src/mesa/main/blit.h                           |  6 ++++
 src/mesa/main/tests/dispatch_sanity.cpp        |  1 +
 4 files changed, 72 insertions(+)

diff --git a/src/mapi/glapi/gen/ARB_direct_state_access.xml b/src/mapi/glapi/gen/ARB_direct_state_access.xml
index 36de3c1..4e5ba0b 100644
--- a/src/mapi/glapi/gen/ARB_direct_state_access.xml
+++ b/src/mapi/glapi/gen/ARB_direct_state_access.xml
@@ -140,6 +140,21 @@
       <param name="layer" type="GLint" />
    </function>
 
+   <function name="BlitNamedFramebuffer" offset="assign">
+      <param name="readFramebuffer" type="GLuint" />
+      <param name="drawFramebuffer" type="GLuint" />
+      <param name="srcX0" type="GLint" />
+      <param name="srcY0" type="GLint" />
+      <param name="srcX1" type="GLint" />
+      <param name="srcY1" type="GLint" />
+      <param name="dstX0" type="GLint" />
+      <param name="dstY0" type="GLint" />
+      <param name="dstX1" type="GLint" />
+      <param name="dstY1" type="GLint" />
+      <param name="mask" type="GLbitfield" />
+      <param name="filter" type="GLenum" />
+   </function>
+
    <function name="CheckNamedFramebufferStatus" offset="assign">
       <return type="GLenum" />
       <param name="framebuffer" type="GLuint" />
diff --git a/src/mesa/main/blit.c b/src/mesa/main/blit.c
index b6d6d75..e03b5dc 100644
--- a/src/mesa/main/blit.c
+++ b/src/mesa/main/blit.c
@@ -524,3 +524,53 @@ _mesa_BlitFramebuffer(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
                           dstX0, dstY0, dstX1, dstY1,
                           mask, filter, "glBlitFramebuffer");
 }
+
+void GLAPIENTRY
+_mesa_BlitNamedFramebuffer(GLuint readFramebuffer, GLuint drawFramebuffer,
+                           GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
+                           GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
+                           GLbitfield mask, GLenum filter)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   struct gl_framebuffer *readFb, *drawFb;
+
+   if (MESA_VERBOSE & VERBOSE_API)
+      _mesa_debug(ctx,
+                  "glBlitNamedFramebuffer(%u %u %d, %d, %d, %d, "
+                  " %d, %d, %d, %d, 0x%x, %s)\n",
+                  readFramebuffer, drawFramebuffer,
+                  srcX0, srcY0, srcX1, srcY1,
+                  dstX0, dstY0, dstX1, dstY1,
+                  mask, _mesa_lookup_enum_by_nr(filter));
+
+   /*
+    * According to PDF page 533 of the OpenGL 4.5 core spec (30.10.2014,
+    * Section 18.3 Copying Pixels):
+    *   "... if readFramebuffer or drawFramebuffer is zero (for
+    *   BlitNamedFramebuffer), then the default read or draw framebuffer is
+    *   used as the corresponding source or destination framebuffer,
+    *   respectively."
+    */
+   if (readFramebuffer) {
+      readFb = _mesa_lookup_framebuffer_err(ctx, readFramebuffer,
+                                            "glBlitNamedFramebuffer");
+      if (!readFb)
+         return;
+   }
+   else
+      readFb = ctx->WinSysReadBuffer;
+
+   if (drawFramebuffer) {
+      drawFb = _mesa_lookup_framebuffer_err(ctx, drawFramebuffer,
+                                            "glBlitNamedFramebuffer");
+      if (!drawFb)
+         return;
+   }
+   else
+      drawFb = ctx->WinSysDrawBuffer;
+
+   _mesa_blit_framebuffer(ctx, readFb, drawFb,
+                          srcX0, srcY0, srcX1, srcY1,
+                          dstX0, dstY0, dstX1, dstY1,
+                          mask, filter, "glBlitNamedFramebuffer");
+}
diff --git a/src/mesa/main/blit.h b/src/mesa/main/blit.h
index b854f5f..54b946e 100644
--- a/src/mesa/main/blit.h
+++ b/src/mesa/main/blit.h
@@ -41,5 +41,11 @@ _mesa_BlitFramebuffer(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
                          GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
                          GLbitfield mask, GLenum filter);
 
+extern void GLAPIENTRY
+_mesa_BlitNamedFramebuffer(GLuint readFramebuffer, GLuint drawFramebuffer,
+                           GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
+                           GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
+                           GLbitfield mask, GLenum filter);
+
 
 #endif /* BLIT_H */
diff --git a/src/mesa/main/tests/dispatch_sanity.cpp b/src/mesa/main/tests/dispatch_sanity.cpp
index a6d8523..891ae0f 100644
--- a/src/mesa/main/tests/dispatch_sanity.cpp
+++ b/src/mesa/main/tests/dispatch_sanity.cpp
@@ -974,6 +974,7 @@ const struct function gl_core_functions_possible[] = {
    { "glNamedFramebufferRenderbuffer", 45, -1 },
    { "glNamedFramebufferTexture", 45, -1 },
    { "glNamedFramebufferTextureLayer", 45, -1 },
+   { "glBlitNamedFramebuffer", 45, -1 },
    { "glCheckNamedFramebufferStatus", 45, -1 },
    { "glGetNamedFramebufferAttachmentParameteriv", 45, -1 },
    { "glCreateTextures", 45, -1 },
-- 
2.1.0