st/mesa: Implement GL_OES_EGL_image driver hooks.

Use st_manager::get_egl_image to look up GLeglImageOES and implement
EGLImageTargetTexture2D and EGLImageTargetRenderbufferStorage.

src/mesa/SConscript

@@ -167,6 +167,7 @@ if env['platform'] != 'winddk':
 		'state_tracker/st_cb_condrender.c',
 		'state_tracker/st_cb_flush.c',
 		'state_tracker/st_cb_drawpixels.c',
+		'state_tracker/st_cb_eglimage.c',
 		'state_tracker/st_cb_fbo.c',
 		'state_tracker/st_cb_feedback.c',
 		'state_tracker/st_cb_program.c',

src/mesa/sources.mak

@@ -199,6 +199,7 @@ STATETRACKER_SOURCES = \
 	state_tracker/st_cb_condrender.c \
 	state_tracker/st_cb_flush.c \
 	state_tracker/st_cb_drawpixels.c \
+	state_tracker/st_cb_eglimage.c \
 	state_tracker/st_cb_fbo.c \
 	state_tracker/st_cb_feedback.c \
 	state_tracker/st_cb_program.c \

src/mesa/state_tracker/st_cb_eglimage.c

@@ -0,0 +1,160 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  7.9
+ *
+ * Copyright (C) 2010 LunarG Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Chia-I Wu <olv@lunarg.com>
+ */
+
+#include "main/texobj.h"
+#include "main/texfetch.h"
+#include "main/teximage.h"
+#include "util/u_inlines.h"
+#include "util/u_format.h"
+#include "st_cb_eglimage.h"
+#include "st_cb_fbo.h"
+#include "st_texture.h"
+#include "st_format.h"
+#include "st_manager.h"
+
+#if FEATURE_OES_EGL_image
+
+/**
+ * Return the base format just like _mesa_base_fbo_format does.
+ */
+static GLenum
+st_pipe_format_to_base_format(enum pipe_format format)
+{
+   GLenum base_format;
+
+   if (util_format_is_depth_or_stencil(format)) {
+      if (util_format_is_depth_and_stencil(format)) {
+         base_format = GL_DEPTH_STENCIL;
+      }
+      else {
+         if (format == PIPE_FORMAT_S8_USCALED)
+            base_format = GL_STENCIL_INDEX;
+         else
+            base_format = GL_DEPTH_COMPONENT;
+      }
+   }
+   else {
+      /* is this enough? */
+      if (util_format_has_alpha(format))
+         base_format = GL_RGBA;
+      else
+         base_format = GL_RGB;
+   }
+
+   return base_format;
+}
+
+static void
+st_egl_image_target_renderbuffer_storage(GLcontext *ctx,
+					 struct gl_renderbuffer *rb,
+					 GLeglImageOES image_handle)
+{
+   struct st_context *st = ctx->st;
+   struct st_renderbuffer *strb = st_renderbuffer(rb);
+   struct pipe_surface *ps;
+   unsigned usage;
+
+   usage = PIPE_BUFFER_USAGE_GPU_READ | PIPE_BUFFER_USAGE_GPU_WRITE;
+   ps = st_manager_get_egl_image_surface(st, (void *) image_handle, usage);
+   if (ps) {
+      strb->Base.Width = ps->width;
+      strb->Base.Height = ps->height;
+      strb->Base.Format = st_pipe_format_to_mesa_format(ps->format);
+      strb->Base.DataType = st_format_datatype(ps->format);
+      strb->Base._BaseFormat = st_pipe_format_to_base_format(ps->format);
+      strb->Base.InternalFormat = strb->Base._BaseFormat;
+
+      pipe_surface_reference(&strb->surface, ps);
+      pipe_texture_reference(&strb->texture, ps->texture);
+
+      pipe_surface_reference(&ps, NULL);
+   }
+}
+
+static void
+st_bind_surface(GLcontext *ctx, GLenum target,
+                struct gl_texture_object *texObj,
+                struct gl_texture_image *texImage,
+                struct pipe_surface *ps)
+{
+   struct st_texture_object *stObj;
+   struct st_texture_image *stImage;
+   GLenum internalFormat;
+
+   /* map pipe format to base format */
+   if (util_format_get_component_bits(ps->format, UTIL_FORMAT_COLORSPACE_RGB, 3) > 0)
+      internalFormat = GL_RGBA;
+   else
+      internalFormat = GL_RGB;
+
+   stObj = st_texture_object(texObj);
+   stImage = st_texture_image(texImage);
+
+   /* switch to surface based */
+   if (!stObj->surface_based) {
+      _mesa_clear_texture_object(ctx, texObj);
+      stObj->surface_based = GL_TRUE;
+   }
+
+   _mesa_init_teximage_fields(ctx, target, texImage,
+                              ps->width, ps->height, 1, 0, internalFormat);
+   texImage->TexFormat = st_pipe_format_to_mesa_format(ps->format);
+   _mesa_set_fetch_functions(texImage, 2);
+
+   stObj->pipe = ctx->st->pipe;
+   /* FIXME create a non-default sampler view from the pipe_surface? */
+   pipe_texture_reference(&stImage->pt, ps->texture);
+
+   _mesa_dirty_texobj(ctx, texObj, GL_TRUE);
+}
+
+static void
+st_egl_image_target_texture_2d(GLcontext *ctx, GLenum target,
+			       struct gl_texture_object *texObj,
+			       struct gl_texture_image *texImage,
+			       GLeglImageOES image_handle)
+{
+   struct st_context *st = ctx->st;
+   struct pipe_surface *ps;
+   unsigned usage;
+
+   usage = PIPE_BUFFER_USAGE_GPU_READ | PIPE_BUFFER_USAGE_GPU_WRITE;
+   ps = st_manager_get_egl_image_surface(st, (void *) image_handle, usage);
+   if (ps) {
+      st_bind_surface(ctx, target, texObj, texImage, ps);
+      pipe_surface_reference(&ps, NULL);
+   }
+}
+
+void
+st_init_eglimage_functions(struct dd_function_table *functions)
+{
+   functions->EGLImageTargetTexture2D = st_egl_image_target_texture_2d;
+   functions->EGLImageTargetRenderbufferStorage = st_egl_image_target_renderbuffer_storage;
+}
+
+#endif /* FEATURE_OES_EGL_image */

src/mesa/state_tracker/st_cb_eglimage.h

@@ -0,0 +1,48 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  7.9
+ *
+ * Copyright (C) 2010 LunarG Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Chia-I Wu <olv@lunarg.com>
+ */
+
+#ifndef ST_CB_EGLIMAGE_H
+#define ST_CB_EGLIMAGE_H
+
+#include "main/mtypes.h"
+#include "main/dd.h"
+
+#if FEATURE_OES_EGL_image
+
+extern void
+st_init_eglimage_functions(struct dd_function_table *functions);
+
+#else
+
+static INLINE void
+st_init_eglimage_functions(struct dd_function_table *functions)
+{
+}
+
+#endif
+
+#endif /* ST_CB_EGLIMAGE_H */

src/mesa/state_tracker/st_context.c

@@ -46,6 +46,7 @@
 #if FEATURE_OES_draw_texture
 #include "st_cb_drawtex.h"
 #endif
+#include "st_cb_eglimage.h"
 #include "st_cb_fbo.h"
 #if FEATURE_feedback
 #include "st_cb_feedback.h"
@@ -359,6 +360,8 @@ void st_init_driver_functions(struct dd_function_table *functions)
    st_init_drawtex_functions(functions);
 #endif
 
+   st_init_eglimage_functions(functions);
+
    st_init_fbo_functions(functions);
 #if FEATURE_feedback
    st_init_feedback_functions(functions);

src/mesa/state_tracker/st_manager.c

@@ -720,6 +720,34 @@ st_manager_flush_frontbuffer(struct st_context *st)
    stfb->iface->flush_front(stfb->iface, ST_ATTACHMENT_FRONT_LEFT);
 }
 
+/**
+ * Return the surface of an EGLImage.
+ */
+struct pipe_surface *
+st_manager_get_egl_image_surface(struct st_context *st,
+                                 void *eglimg, unsigned usage)
+{
+   struct st_manager *smapi =
+      (struct st_manager *) st->iface.st_context_private;
+   struct st_egl_image stimg;
+   struct pipe_surface *ps;
+
+   if (!smapi || !smapi->get_egl_image)
+      return NULL;
+
+   memset(&stimg, 0, sizeof(stimg));
+   stimg.stctxi = &st->iface;
+   stimg.egl_image = eglimg;
+   if (!smapi->get_egl_image(smapi, &stimg))
+      return NULL;
+
+   ps = smapi->screen->get_tex_surface(smapi->screen,
+         stimg.texture, stimg.face, stimg.level, stimg.zslice, usage);
+   pipe_texture_reference(&stimg.texture, NULL);
+
+   return ps;
+}
+
 /**
  * Re-validate the framebuffers.
  */

src/mesa/state_tracker/st_manager.h

@@ -31,6 +31,10 @@
 #include "state_tracker/st_api.h"
 #include "st_context.h"
 
+struct pipe_surface *
+st_manager_get_egl_image_surface(struct st_context *st,
+                                 void *eglimg, unsigned usage);
+
 void
 st_manager_flush_frontbuffer(struct st_context *st);