main: Added entry point for glGetTextureImage.

Reviewed-by: Anuj Phogat <[email protected]>

1 files changed, 230 insertions, 66 deletions

diff --git a/src/mesa/main/texgetimage.c b/src/mesa/main/texgetimage.c
index 4ec8f9e9ec5..db4fc01f057 100644
--- a/src/mesa/main/texgetimage.c
+++ b/src/mesa/main/texgetimage.c
@@ -758,24 +758,17 @@ _mesa_GetCompressedTexImage_sw(struct gl_context *ctx,
 
 
 /**
- * Validate the texture target enum supplied to glTexImage or
- * glCompressedTexImage.
+ * Validate the texture target enum supplied to glGetTex(ture)Image or
+ * glGetCompressedTex(ture)Image.
  */
 static GLboolean
-legal_getteximage_target(struct gl_context *ctx, GLenum target)
+legal_getteximage_target(struct gl_context *ctx, GLenum target, bool dsa)
 {
    switch (target) {
    case GL_TEXTURE_1D:
    case GL_TEXTURE_2D:
    case GL_TEXTURE_3D:
       return GL_TRUE;
-   case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
-   case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
-   case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
-   case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
-   case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
-   case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
-      return ctx->Extensions.ARB_texture_cube_map;
    case GL_TEXTURE_RECTANGLE_NV:
       return ctx->Extensions.NV_texture_rectangle;
    case GL_TEXTURE_1D_ARRAY_EXT:
@@ -783,6 +776,24 @@ legal_getteximage_target(struct gl_context *ctx, GLenum target)
       return ctx->Extensions.EXT_texture_array;
    case GL_TEXTURE_CUBE_MAP_ARRAY:
       return ctx->Extensions.ARB_texture_cube_map_array;
+
+   /* Section 8.11 (Texture Queries) of the OpenGL 4.5 core profile spec
+    * (30.10.2014) says:
+    *    "An INVALID_ENUM error is generated if the effective target is not
+    *    one of TEXTURE_1D, TEXTURE_2D, TEXTURE_3D, TEXTURE_1D_ARRAY,
+    *    TEXTURE_2D_ARRAY, TEXTURE_CUBE_MAP_ARRAY, TEXTURE_RECTANGLE, one of
+    *    the targets from table 8.19 (for GetTexImage and GetnTexImage *only*),
+    *    or TEXTURE_CUBE_MAP (for GetTextureImage *only*)." (Emphasis added.)
+    */
+   case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
+   case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
+   case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
+   case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
+   case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
+   case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
+      return dsa ? GL_FALSE : ctx->Extensions.ARB_texture_cube_map;
+   case GL_TEXTURE_CUBE_MAP:
+      return dsa ? GL_TRUE : GL_FALSE;
    default:
       return GL_FALSE;
    }
@@ -790,84 +801,75 @@ legal_getteximage_target(struct gl_context *ctx, GLenum target)
 
 
 /**
- * Do error checking for a glGetTexImage() call.
+ * Do error checking for a glGetTex(ture)Image() call.
  * \return GL_TRUE if any error, GL_FALSE if no errors.
  */
 static GLboolean
-getteximage_error_check(struct gl_context *ctx, GLenum target, GLint level,
+getteximage_error_check(struct gl_context *ctx,
+                        struct gl_texture_image *texImage,
+                        GLenum target, GLint level,
                         GLenum format, GLenum type, GLsizei clientMemSize,
-                        GLvoid *pixels )
+                        GLvoid *pixels, bool dsa)
 {
-   struct gl_texture_object *texObj;
-   struct gl_texture_image *texImage;
+   assert(texImage);
+
    const GLint maxLevels = _mesa_max_texture_levels(ctx, target);
    const GLuint dimensions = (target == GL_TEXTURE_3D) ? 3 : 2;
-   GLenum baseFormat, err;
-
-   if (!legal_getteximage_target(ctx, target)) {
-      _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(target=0x%x)", target);
-      return GL_TRUE;
-   }
+   GLenum baseFormat;
+   const char *suffix = dsa ? "ture" : "";
 
    assert(maxLevels != 0);
    if (level < 0 || level >= maxLevels) {
-      _mesa_error( ctx, GL_INVALID_VALUE, "glGetTexImage(level)" );
-      return GL_TRUE;
-   }
-
-   err = _mesa_error_check_format_and_type(ctx, format, type);
-   if (err != GL_NO_ERROR) {
-      _mesa_error(ctx, err, "glGetTexImage(format/type)");
-      return GL_TRUE;
-   }
-
-   texObj = _mesa_get_current_tex_object(ctx, target);
-
-   if (!texObj) {
-      _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(target)");
+      _mesa_error(ctx, GL_INVALID_VALUE,
+                  "glGetTex%sImage(level out of range)", suffix);
       return GL_TRUE;
    }
 
-   texImage = _mesa_select_tex_image(texObj, target, level);
-   if (!texImage) {
-      /* non-existant texture image */
-      return GL_TRUE;
-   }
+   /*
+    * Format and type checking has been moved up to GetnTexImage and
+    * GetTextureImage so that it happens before getting the texImage object.
+    */
 
    baseFormat = _mesa_get_format_base_format(texImage->TexFormat);
-      
+
    /* Make sure the requested image format is compatible with the
     * texture's format.
     */
    if (_mesa_is_color_format(format)
        && !_mesa_is_color_format(baseFormat)) {
-      _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glGetTex%sImage(format mismatch)", suffix);
       return GL_TRUE;
    }
    else if (_mesa_is_depth_format(format)
             && !_mesa_is_depth_format(baseFormat)
             && !_mesa_is_depthstencil_format(baseFormat)) {
-      _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glGetTex%sImage(format mismatch)", suffix);
       return GL_TRUE;
    }
    else if (_mesa_is_stencil_format(format)
             && !ctx->Extensions.ARB_texture_stencil8) {
-      _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format=GL_STENCIL_INDEX)");
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "glGetTex%sImage(format=GL_STENCIL_INDEX)", suffix);
       return GL_TRUE;
    }
    else if (_mesa_is_ycbcr_format(format)
             && !_mesa_is_ycbcr_format(baseFormat)) {
-      _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glGetTex%sImage(format mismatch)", suffix);
       return GL_TRUE;
    }
    else if (_mesa_is_depthstencil_format(format)
             && !_mesa_is_depthstencil_format(baseFormat)) {
-      _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glGetTex%sImage(format mismatch)", suffix);
       return GL_TRUE;
    }
    else if (_mesa_is_enum_format_integer(format) !=
             _mesa_is_format_integer(texImage->TexFormat)) {
-      _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glGetTex%sImage(format mismatch)", suffix);
       return GL_TRUE;
    }
 
@@ -876,11 +878,13 @@ getteximage_error_check(struct gl_context *ctx, GLenum target, GLint level,
                                   format, type, clientMemSize, pixels)) {
       if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
          _mesa_error(ctx, GL_INVALID_OPERATION,
-                     "glGetTexImage(out of bounds PBO access)");
+                     "glGetTex%sImage(out of bounds PBO access)", suffix);
       } else {
          _mesa_error(ctx, GL_INVALID_OPERATION,
-                     "glGetnTexImageARB(out of bounds access:"
-                     " bufSize (%d) is too small)", clientMemSize);
+                     "%s(out of bounds access:"
+                     " bufSize (%d) is too small)",
+                     dsa ? "glGetTextureImage" : "glGetnTexImageARB",
+                     clientMemSize);
       }
       return GL_TRUE;
    }
@@ -889,7 +893,7 @@ getteximage_error_check(struct gl_context *ctx, GLenum target, GLint level,
       /* PBO should not be mapped */
       if (_mesa_check_disallowed_mapping(ctx->Pack.BufferObj)) {
          _mesa_error(ctx, GL_INVALID_OPERATION,
-                     "glGetTexImage(PBO is mapped)");
+                     "glGetTex%sImage(PBO is mapped)", suffix);
          return GL_TRUE;
       }
    }
@@ -898,9 +902,12 @@ getteximage_error_check(struct gl_context *ctx, GLenum target, GLint level,
 }
 
 
-
 /**
- * Get texture image.  Called by glGetTexImage.
+ * This is the implementation for glGetnTexImageARB, glGetTextureImage,
+ * and glGetTexImage.
+ *
+ * Requires caller to pass in texImage object because _mesa_GetTextureImage
+ * must handle the GL_TEXTURE_CUBE_MAP target.
  *
  * \param target texture target.
  * \param level image level.
@@ -908,19 +915,29 @@ getteximage_error_check(struct gl_context *ctx, GLenum target, GLint level,
  * \param type pixel data type for returned image.
  * \param bufSize size of the pixels data buffer.
  * \param pixels returned pixel data.
+ * \param dsa True when the caller is an ARB_direct_state_access function,
+ *            false otherwise
  */
-void GLAPIENTRY
-_mesa_GetnTexImageARB( GLenum target, GLint level, GLenum format,
-                       GLenum type, GLsizei bufSize, GLvoid *pixels )
+void
+_mesa_get_texture_image(struct gl_context *ctx,
+                        struct gl_texture_object *texObj,
+                        struct gl_texture_image *texImage, GLenum target,
+                        GLint level, GLenum format, GLenum type,
+                        GLsizei bufSize, GLvoid *pixels, bool dsa)
 {
-   struct gl_texture_object *texObj;
-   struct gl_texture_image *texImage;
-   GET_CURRENT_CONTEXT(ctx);
+   assert(texObj);
+   assert(texImage);
 
    FLUSH_VERTICES(ctx, 0);
 
-   if (getteximage_error_check(ctx, target, level, format, type,
-                               bufSize, pixels)) {
+   /*
+    * Legal target checking has been moved up to GetnTexImage and
+    * GetTextureImage so that it can be caught before receiving a NULL
+    * texImage object and exiting.
+    */
+
+   if (getteximage_error_check(ctx, texImage, target, level, format,
+                               type, bufSize, pixels, dsa)) {
       return;
    }
 
@@ -929,15 +946,13 @@ _mesa_GetnTexImageARB( GLenum target, GLint level, GLenum format,
       return;
    }
 
-   texObj = _mesa_get_current_tex_object(ctx, target);
-   texImage = _mesa_select_tex_image(texObj, target, level);
-
    if (_mesa_is_zero_size_texture(texImage))
       return;
 
    if (MESA_VERBOSE & (VERBOSE_API | VERBOSE_TEXTURE)) {
-      _mesa_debug(ctx, "glGetTexImage(tex %u) format = %s, w=%d, h=%d,"
+      _mesa_debug(ctx, "glGetTex%sImage(tex %u) format = %s, w=%d, h=%d,"
                   " dstFmt=0x%x, dstType=0x%x\n",
+                  dsa ? "ture": "",
                   texObj->Name,
                   _mesa_get_format_name(texImage->TexFormat),
                   texImage->Width, texImage->Height,
@@ -951,6 +966,58 @@ _mesa_GetnTexImageARB( GLenum target, GLint level, GLenum format,
    _mesa_unlock_texture(ctx, texObj);
 }
 
+/**
+ * Get texture image.  Called by glGetTexImage.
+ *
+ * \param target texture target.
+ * \param level image level.
+ * \param format pixel data format for returned image.
+ * \param type pixel data type for returned image.
+ * \param bufSize size of the pixels data buffer.
+ * \param pixels returned pixel data.
+ */
+void GLAPIENTRY
+_mesa_GetnTexImageARB(GLenum target, GLint level, GLenum format,
+                      GLenum type, GLsizei bufSize, GLvoid *pixels)
+{
+   struct gl_texture_object *texObj;
+   struct gl_texture_image *texImage;
+   GLenum err;
+   GET_CURRENT_CONTEXT(ctx);
+
+   /*
+    * This has been moved here because a format/type mismatch can cause a NULL
+    * texImage object, which in turn causes the mismatch error to be
+    * ignored.
+    */
+   err = _mesa_error_check_format_and_type(ctx, format, type);
+   if (err != GL_NO_ERROR) {
+      _mesa_error(ctx, err, "glGetnTexImage(format/type)");
+      return;
+   }
+
+   /*
+    * Legal target checking has been moved here to prevent exiting with a NULL
+    * texImage object.
+    */
+   if (!legal_getteximage_target(ctx, target, false)) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetnTexImage(target=0x%x)",
+                  target);
+      return;
+   }
+
+   texObj = _mesa_get_current_tex_object(ctx, target);
+   if (!texObj)
+      return;
+
+   texImage = _mesa_select_tex_image(texObj, target, level);
+   if (!texImage)
+      return;
+
+   _mesa_get_texture_image(ctx, texObj, texImage, target, level, format, type,
+                           bufSize, pixels, false);
+}
+
 
 void GLAPIENTRY
 _mesa_GetTexImage( GLenum target, GLint level, GLenum format,
@@ -959,6 +1026,103 @@ _mesa_GetTexImage( GLenum target, GLint level, GLenum format,
    _mesa_GetnTexImageARB(target, level, format, type, INT_MAX, pixels);
 }
 
+/**
+ * Get texture image.
+ *
+ * \param texture texture name.
+ * \param level image level.
+ * \param format pixel data format for returned image.
+ * \param type pixel data type for returned image.
+ * \param bufSize size of the pixels data buffer.
+ * \param pixels returned pixel data.
+ */
+void GLAPIENTRY
+_mesa_GetTextureImage(GLuint texture, GLint level, GLenum format,
+                      GLenum type, GLsizei bufSize, GLvoid *pixels)
+{
+   struct gl_texture_object *texObj;
+   struct gl_texture_image *texImage;
+   int i;
+   GLint image_stride;
+   GLenum err;
+   GET_CURRENT_CONTEXT(ctx);
+
+   /*
+    * This has been moved here because a format/type mismatch can cause a NULL
+    * texImage object, which in turn causes the mismatch error to be
+    * ignored.
+    */
+   err = _mesa_error_check_format_and_type(ctx, format, type);
+   if (err != GL_NO_ERROR) {
+      _mesa_error(ctx, err, "glGetTextureImage(format/type)");
+      return;
+   }
+
+   texObj = _mesa_lookup_texture_err(ctx, texture, "glGetTextureImage");
+   if (!texObj)
+      return;
+
+   /*
+    * Legal target checking has been moved here to prevent exiting with a NULL
+    * texImage object.
+    */
+   if (!legal_getteximage_target(ctx, texObj->Target, true)) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetTextureImage(target=%s)",
+                  _mesa_lookup_enum_by_nr(texObj->Target));
+      return;
+   }
+
+   /* Must handle special case GL_TEXTURE_CUBE_MAP. */
+   if (texObj->Target == GL_TEXTURE_CUBE_MAP) {
+
+      /* Error checking */
+      if (texObj->NumLayers < 6) {
+         /* Not enough image planes for a cube map.  The spec does not say
+          * what should happen in this case because the user has always
+          * specified each cube face separately (using
+          * GL_TEXTURE_CUBE_MAP_POSITIVE_X+i) in previous GL versions.
+          * This is addressed in Khronos Bug 13223.
+          */
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetTextureImage(insufficient cube map storage)");
+         return;
+      }
+      for (i = 0; i < 6; ++i) { /* For each face. */
+         if (!texObj->Image[i][level]) {
+            /* Not enough image planes for a cube map.  The spec does not say
+             * what should happen in this case because the user has always
+             * specified each cube face separately (using
+             * GL_TEXTURE_CUBE_MAP_POSITIVE_X+i) in previous GL versions.
+             * This is addressed in Khronos Bug 13223.
+             */
+            _mesa_error(ctx, GL_INVALID_OPERATION,
+                        "glGetTextureImage(insufficient cube map storage)");
+            return;
+         }
+      }
+
+      /* Copy each face. */
+      for (i = 0; i < 6; ++i) {
+         texImage = texObj->Image[i][level];
+         _mesa_get_texture_image(ctx, texObj, texImage, texObj->Target, level,
+                                 format, type, bufSize, pixels, true);
+
+         image_stride = _mesa_image_image_stride(&ctx->Pack, texImage->Width,
+                                                 texImage->Height, format,
+                                                 type);
+         pixels += image_stride;
+         bufSize -= image_stride;
+      }
+   }
+   else {
+      texImage = _mesa_select_tex_image(texObj, texObj->Target, level);
+      if (!texImage)
+         return;
+
+      _mesa_get_texture_image(ctx, texObj, texImage, texObj->Target, level,
+                              format, type, bufSize, pixels, true);
+   }
+}
 
 /**
  * Do error checking for a glGetCompressedTexImage() call.
@@ -973,7 +1137,7 @@ getcompressedteximage_error_check(struct gl_context *ctx, GLenum target,
    const GLint maxLevels = _mesa_max_texture_levels(ctx, target);
    GLuint compressedSize, dimensions;
 
-   if (!legal_getteximage_target(ctx, target)) {
+   if (!legal_getteximage_target(ctx, target, false)) {
       _mesa_error(ctx, GL_INVALID_ENUM, "glGetCompressedTexImage(target=0x%x)",
                   target);
       return GL_TRUE;